Atmel Microcontrollers
AT09333: USB Host Interface (UHI) for
Communication Class Device (CDC)
APPLICATION NOTE
Introduction
USB Host Interface (UHI) for Communication Class Device (CDC) provides
an interface for the configuration and management of USB CDC serial host.
The outline of this documentation is as follows:
•
API Overview
•
Quick Start Guide for USB Host Communication Device Class Module
(UHI CDC)
•
Configuration File Examples
®
For more details for Atmel Software Framework (ASF) USB Host Stack,
refer to following application note:
•
AVR4950: ASF - USB Host Stack
Atmel-42338B-USB-Host-Interface-UHI-for-Communication-Class-Device-CDC_AT09333_Application Note-12/2015
Table of Contents
Introduction......................................................................................................................1
1. Software License....................................................................................................... 4
2. API Overview............................................................................................................. 5
2.1.
Macro Definitions..........................................................................................................................5
2.1.1.
Interface with USB Host Core (UHC).............................................................................5
2.2.
Function Definitions......................................................................................................................5
2.2.1.
Functions Required by UHC.......................................................................................... 5
2.2.2.
UHI for Communication Device Class........................................................................... 6
3. Quick Start Guide for USB Host Communication Device Class Module (UHI CDC)
.................................................................................................................................10
3.1.
3.2.
3.3.
3.4.
3.5.
Basic Use Case..........................................................................................................................10
3.1.1.
Setup Steps................................................................................................................. 10
3.1.2.
Usage Steps................................................................................................................ 10
Advanced Use Cases................................................................................................................. 11
Enable USB High Speed Support.............................................................................................. 12
3.3.1.
Setup Steps................................................................................................................. 12
3.3.2.
Usage Steps................................................................................................................ 12
Multiple Classes Support............................................................................................................12
3.4.1.
Setup Steps................................................................................................................. 12
3.4.2.
Usage Steps................................................................................................................ 12
Dual Roles Support.................................................................................................................... 12
3.5.1.
Setup Steps................................................................................................................. 13
3.5.2.
Usage Steps................................................................................................................ 13
4. Configuration File Examples....................................................................................15
4.1.
4.2.
4.3.
4.4.
conf_usb_host.h......................................................................................................................... 15
4.1.1.
UHI CDC Single...........................................................................................................15
4.1.2.
UHI CDC Multiple (Composite)....................................................................................16
conf_clock.h................................................................................................................................17
4.2.1.
AT32UC3A0, AT32UC3A1, AT32UC3B Devices (USBB)............................................ 17
4.2.2.
AT32UC3A3 and AT32UC3A4 Devices (USBB with High Speed Support)................. 17
4.2.3.
AT32UC3C, ATUCXXD, ATUCXXL3U, ATUCXXL4U Devices (USBC).......................18
4.2.4.
SAM3X and SAM3A Devices (UOTGHS: USB OTG High Speed)..............................19
conf_clocks.h..............................................................................................................................20
4.3.1.
SAM D21 Devices (USB).............................................................................................20
conf_board.h...............................................................................................................................23
4.4.1.
AT32UC3A0, AT32UC3A1, AT32UC3B Devices (USBB)............................................ 23
4.4.2.
AT32UC3A3 and AT32UC3A4 Devices (USBB with High Speed Support)................. 23
4.4.3.
AT32UC3C, ATUCXXD, ATUCXXL3U, ATUCXXL4U Devices (USBC).......................23
4.4.4.
SAM3X and SAM3A Devices (UOTGHS: USB OTG High Speed)..............................24
4.4.5.
SAM D21 Devices (USB).............................................................................................25
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5. USB Host Basic Setup.............................................................................................26
5.1.
5.2.
5.3.
5.4.
USB Host User Configuration.....................................................................................................26
USB Host User Callback............................................................................................................ 26
USB Host Setup Steps............................................................................................................... 27
5.3.1.
USB Host Controller (UHC) - Prerequisites................................................................. 27
5.3.2.
USB Host Controller (UHC) - Example Code.............................................................. 27
5.3.3.
USB Device Controller (UHC) - Workflow....................................................................28
conf_clock.h Examples...............................................................................................................28
6. Document Revision History..................................................................................... 30
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1.
Software License
Redistribution and use in source and binary forms, with or without modification, are permitted provided
that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this list of conditions and the
following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
following disclaimer in the documentation and/or other materials provided with the distribution.
3. The name of Atmel may not be used to endorse or promote products derived from this software without
specific prior written permission.
4. This software may only be redistributed and used in connection with an Atmel microcontroller product.
THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE EXPRESSLY AND SPECIFICALLY
DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
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2.
API Overview
2.1.
Macro Definitions
2.1.1.
Interface with USB Host Core (UHC)
Definition and functions required by UHC.
2.1.1.1.
Macro UHI_CDC
#define UHI_CDC
Global definition which contains standard UHI API for UHC. It must be added in USB_HOST_UHI define
from conf_usb_host.h file.
2.2.
Function Definitions
2.2.1.
Functions Required by UHC
2.2.1.1.
Function uhi_cdc_install()
Install interface.
uhc_enum_status_t uhi_cdc_install(
uhc_device_t * dev)
Allocate interface endpoints if supported.
Table 2-1. Parameters
Data direction
Parameter name
Description
[in]
uhc_device_t
Device to request
Returns
Status of the install.
2.2.1.2.
Function uhi_cdc_enable()
Enable the interface.
void uhi_cdc_enable(
uhc_device_t * dev)
Enable a USB interface corresponding to UHI.
Table 2-2. Parameters
Data direction
Parameter name
Description
[in]
uhc_device_t
Device to request
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2.2.1.3.
Function uhi_cdc_uninstall()
Uninstall the interface (if installed).
void uhi_cdc_uninstall(
uhc_device_t * dev)
Table 2-3. Parameters
2.2.1.4.
Data direction
Parameter name
Description
[in]
uhc_device_t
Device to request
Function uhi_cdc_sof()
Signal that a SOF has occurred.
void uhi_cdc_sof(
bool b_micro)
2.2.2.
UHI for Communication Device Class
Common APIs used by high level application to use this USB host class. These routines are used by
memory to transfer its data to/from USB CDC endpoint.
2.2.2.1.
Function uhi_cdc_open()
Open a port of UHI CDC interface.
bool uhi_cdc_open(
uint8_t port,
usb_cdc_line_coding_t * configuration)
Table 2-4. Parameters
Data direction
Parameter name
Description
[in]
port
Communication port number
[in]
configuration
Pointer on port configuration
Returns
true if the port is available.
2.2.2.2.
Function uhi_cdc_close()
Close a port.
void uhi_cdc_close(
uint8_t port)
Table 2-5. Parameters
Data direction
Parameter name
Description
[in]
port
Communication port number
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2.2.2.3.
Function uhi_cdc_is_rx_ready()
This function checks if a character has been received on the CDC line.
bool uhi_cdc_is_rx_ready(
uint8_t port)
Table 2-6. Parameters
Data direction
Parameter name
Description
[in]
port
Communication port number
Returns
true if a byte is ready to be read.
2.2.2.4.
Function uhi_cdc_get_nb_received()
This function returns the number of character available on the CDC line.
iram_size_t uhi_cdc_get_nb_received(
uint8_t port)
Table 2-7. Parameters
Data direction
Parameter name
Description
[in]
port
Communication port number
Returns
The number of data received.
2.2.2.5.
Function uhi_cdc_getc()
Waits and gets a value on CDC line.
int uhi_cdc_getc(
uint8_t port)
Table 2-8. Parameters
Data direction
Parameter name
Description
[in]
port
Communication port number
Returns
Value read on CDC line.
2.2.2.6.
Function uhi_cdc_read_buf()
Reads a RAM buffer on CDC line.
iram_size_t uhi_cdc_read_buf(
uint8_t port,
void * buf,
iram_size_t size)
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Table 2-9. Parameters
Data direction
Parameter name
Description
[in]
port
Communication port number
[out]
buf
Values read
[in]
size
Number of value read
Returns
The number of data remaining.
2.2.2.7.
Function uhi_cdc_is_tx_ready()
This function checks if a new character sent is possible.
bool uhi_cdc_is_tx_ready(
uint8_t port)
The type int is used to support scanf redirection from compiler LIB.
Table 2-10. Parameters
Data direction
Parameter name
Description
[in]
port
Communication port number
Returns
true if a new character can be sent.
2.2.2.8.
Function uhi_cdc_putc()
Puts a byte on CDC line.
int uhi_cdc_putc(
uint8_t port,
int value)
The type int is used to support printf redirection from compiler LIB.
Table 2-11. Parameters
Data direction
Parameter name
Description
[in]
port
Communication port number
[in]
value
Value to put
Returns
true if function was successfully done, otherwise false.
2.2.2.9.
Function uhi_cdc_write_buf()
Writes a RAM buffer on CDC line.
iram_size_t uhi_cdc_write_buf(
uint8_t port,
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const void * buf,
iram_size_t size)
Table 2-12. Parameters
Data direction
Parameter name
Description
[in]
port
Communication port number
[in]
buf
Values to write
[in]
size
Number of value to write
Returns
The number of data remaining.
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3.
Quick Start Guide for USB Host Communication Device Class Module
(UHI CDC)
This is the quick start guide for the USB Host Communication Device Class Module (UHI CDC) with stepby-step instructions on how to configure and use the modules in a selection of use cases.
The use cases highlights several code fragments. The code fragments in the steps for setup can be
copied into a custom initialization function, while the steps for usage can be copied into, e.g., the main
application function.
3.1.
Basic Use Case
In this basic use case, the "USB Host CDC (Single Class support)" module is used.
The "USB Host CDC (Multiple Classes support)" module usage is described in Advanced Use Cases.
3.1.1.
Setup Steps
As a USB host, it follows common USB host setup steps. Refer to USB Host Basic Setup.
3.1.2.
Usage Steps
3.1.2.1.
Example Code
Content of conf_usb_host.h:
#define USB_HOST_UHI
UHI_CDC
#define UHI_CDC_CHANGE(dev, b_plug) my_callback_cdc_change(dev, b_plug)
extern bool my_callback_cdc_change(uhc_device_t* dev, bool b_plug);
#define UHI_CDC_RX_NOTIFY() my_callback_cdc_rx_notify()
extern void my_callback_cdc_rx_notify(void);
#include "uhi_cdc.h" // At the end of conf_usb_host.h file
Add to application C-file:
static bool my_flag_cdc_available = false;
bool my_callback_cdc_change(uhc_device_t* dev, bool b_plug)
{
if (b_plug) {
// USB Device CDC connected
my_flag_cdc_available = true;
// Open and configure USB CDC ports
usb_cdc_line_coding_t cfg = {
.dwDTERate
= CPU_TO_LE32(115200),
.bCharFormat = CDC_STOP_BITS_1,
.bParityType = CDC_PAR_NONE,
.bDataBits
= 8,
};
uhi_cdc_open(0, &cfg);
} else {
my_flag_cdc_available = false;
}
}
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void my_callback_cdc_rx_notify(void)
{
}
// Wakeup my_task_rx() task
#define MESSAGE "Hello"
void my_task(void)
{
static bool startup = true;
if (!my_flag_cdc_available) {
startup = true;
return;
}
if (startup) {
startup = false;
// Send data on CDC communication port
uhi_cdc_write_buf(0, MESSAGE, sizeof(MESSAGE)-1);
}
}
uhi_cdc_putc(0,'\n');
return;
void my_task_rx(void)
{
}
3.1.2.2.
while (uhi_cdc_is_rx_ready(0)) {
int value = uhi_cdc_getc(0);
}
Workflow
1.
Ensure that conf_usb_host.h is available and contains the following configuration which is the USB
host CDC configuration:
#define USB_HOST_UHI
UHI_CDC
Note: It defines the list of UHI supported by USB host.
#define UHI_CDC_CHANGE(dev, b_plug) my_callback_cdc_change(dev, b_plug)
extern bool my_callback_cdc_change(uhc_device_t* dev, bool b_plug);
Note: This callback is called when a USB device CDC is plugged or unplugged. The
communication port can be opened and configured here.
#define UHI_CDC_RX_NOTIFY() my_callback_cdc_rx_notify()
extern void my_callback_cdc_rx_notify(void);
2.
3.2.
Note: This callback is called when a new data are received. This can be used to manage data
reception through interrupt and avoid pooling.
The CDC data access functions are described in UHI CDC API Overview.
Advanced Use Cases
For more advanced use of the UHI CDC module, see the following use cases:
•
Enable USB High Speed Support
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•
•
3.3.
Multiple Classes Support
Dual Roles Support
Enable USB High Speed Support
In this use case, the USB host is used to support USB high speed.
3.3.1.
Setup Steps
Prior to implement this use case, be sure to have already applied the UHI module "basic use case".
3.3.2.
Usage Steps
3.3.2.1.
Example Code
Content of conf_usb_host.h:
#define USB_HOST_HS_SUPPORT
3.3.2.2.
Workflow
1.
Ensure that conf_usb_host.h is available and contains the following parameters required for a USB
device high speed (480Mbit/s):
#define
3.4.
USB_HOST_HS_SUPPORT
Multiple Classes Support
In this use case, the USB host is used to support several USB classes.
3.4.1.
Setup Steps
Prior to implement this use case, be sure to have already applied the UHI module "basic use case".
3.4.2.
Usage Steps
3.4.2.1.
Example Code
Content of conf_usb_host.h:
#define USB_HOST_UHI
3.4.2.2.
UHI_HID_MOUSE, UHI_MSC, UHI_CDC
Workflow
1.
Ensure that conf_usb_host.h is available and contains the following parameters:
#define USB_HOST_UHI
UHI_HID_MOUSE, UHI_MSC, UHI_CDC
Note: USB_HOST_UHI defines the list of UHI supported by USB host. Here, you must add all
classes that you want to support.
3.5.
Dual Roles Support
In this use case, the USB host and USB device are enabled, it is the dual role.
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Note: On the Atmel boards, the switch of USB role is managed automatically by the USB stack thank to
a USB On-The-Go (OTG) connector and its USB ID pin. Refer to section "Dual roles" for further
information in the application note:
•
Atmel AVR4950: ASF - USB Host Stack
3.5.1.
Setup Steps
Prior to implement this use case, be sure to have already applied the UHI module "basic use case".
3.5.2.
Usage Steps
3.5.2.1.
Example Code
Content of conf_usb_host.h:
#define UHC_MODE_CHANGE(b_host_mode)
my_callback_mode_change(b_host_mode)
extern void my_callback_mode_change(bool b_host_mode);
Add to application C-file:
void usb_init(void)
{
//udc_start();
}
uhc_start();
bool my_host_mode;
void my_callback_mode_change(bool b_host_mode)
{
}
my_host_mode = b_host_mode;
void my_usb_task(void)
{
}
3.5.2.2.
if (my_host_mode) {
// CALL USB Host task
} else {
// CALL USB Device task
}
Workflow
1.
In case of USB dual roles (Device and Host), the USB stack must be enabled by uhc_start()
and the udc_start() must not be called.
//udc_start();
uhc_start();
2.
In dual role, to know the current USB mode, the callback to notify the mode changes can be used.
•
Ensure that conf_usb_host.h contains the following parameters:
#define UHC_MODE_CHANGE(b_host_mode)
my_callback_mode_change(b_host_mode)
extern void my_callback_mode_change(bool b_host_mode);
•
Ensure that application contains the following code:
bool my_host_mode;
void my_callback_mode_change(bool b_host_mode)
{
my_host_mode = b_host_mode;
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}
void my_usb_task(void)
{
}
if (my_host_mode) {
// CALL USB Host task
} else {
// CALL USB Device task
}
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4.
Configuration File Examples
4.1.
conf_usb_host.h
4.1.1.
UHI CDC Single
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel
Support</a>
*/
#ifndef _CONF_USB_HOST_H_
#define _CONF_USB_HOST_H_
#include "compiler.h"
#define USB_HOST_UHI
UHI_CDC
#define USB_HOST_POWER_MAX
500
// #define USB_HOST_HUB_SUPPORT
#if (UC3A3||UC3A4)
# define USB_HOST_HS_SUPPORT
#endif
//#define UHC_MODE_CHANGE(b_host_mode)
usb_host_mode_change(b_host_mode)
//#define UHC_VBUS_CHANGE(b_present)
usb_host_vbus_change(b_present)
//#define UHC_VBUS_ERROR()
usb_host_vbus_error()
//#define UHC_CONNECTION_EVENT(dev,b_present)
usb_host_connection_event(dev,b_present)
//#define UHC_WAKEUP_EVENT()
usb_host_wakeup_event()
//#define UHC_SOF_EVENT()
usb_host_sof_event()
//#define UHC_DEVICE_CONF(dev)
uint8_t usb_host_device_conf(dev)
//#define UHC_ENUM_EVENT(dev,b_status)
usb_host_enum_event(dev,b_status)
#define UHI_CDC_CHANGE(dev,b_plug)
#define UHI_CDC_RX_NOTIFY()
#include "uhi_cdc.h"
#endif // _CONF_USB_HOST_H_
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4.1.2.
UHI CDC Multiple (Composite)
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel
Support</a>
*/
#ifndef _CONF_USB_HOST_H_
#define _CONF_USB_HOST_H_
#include "compiler.h"
#define USB_HOST_UHI
// UHI_MSC, UHI_HID_MOUSE, UHI_CDC, UHI_VENDOR
#define USB_HOST_POWER_MAX
500
// #define USB_HOST_HUB_SUPPORT
#if (UC3A3 || UC3A4)
# define USB_HOST_HS_SUPPORT
#endif
//#define UHC_MODE_CHANGE(b_host_mode)
usb_host_mode_change(b_host_mode)
//#define UHC_VBUS_CHANGE(b_present)
usb_host_vbus_change(b_present)
//#define UHC_VBUS_ERROR()
usb_host_vbus_error()
//#define UHC_CONNECTION_EVENT(dev,b_present)
usb_host_connection_event(dev,b_present)
//#define UHC_WAKEUP_EVENT()
usb_host_wakeup_event()
//#define UHC_SOF_EVENT()
usb_host_sof_event()
//#define UHC_DEVICE_CONF(dev)
uint8_t usb_host_device_conf(dev)
//#define UHC_ENUM_EVENT(dev,b_status)
usb_host_enum_event(dev,b_status)
#define
#define
#define
#define
#define
UHI_HID_MOUSE_CHANGE(dev,b_plug)
UHI_HID_MOUSE_EVENT_BTN_LEFT(b_state)
UHI_HID_MOUSE_EVENT_BTN_RIGHT(b_state)
UHI_HID_MOUSE_EVENT_BTN_MIDDLE(b_state)
UHI_HID_MOUSE_EVENT_MOUVE(x,y,scroll)
#define UHI_MSC_CHANGE(dev,b_plug)
#define UHI_CDC_CHANGE(dev,b_plug)
#define UHI_CDC_RX_NOTIFY()
#define UHI_VENDOR_CHANGE(dev, b_plug)
#define UHI_VENDOR_VID_PID_LIST {USB_VID_ATMEL,
USB_PID_ATMEL_ASF_VENDOR_CLASS}
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//#include "uhi_msc.h"
//#include "uhi_hid_mouse.h"
#endif // _CONF_USB_HOST_H_
4.2.
conf_clock.h
4.2.1.
AT32UC3A0, AT32UC3A1, AT32UC3B Devices (USBB)
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel
Support</a>
*/
#ifndef CONF_CLOCK_H_INCLUDED
#define CONF_CLOCK_H_INCLUDED
/* ===== System Clock Source Options */
//#define CONFIG_SYSCLK_SOURCE
SYSCLK_SRC_RCSYS
#define CONFIG_SYSCLK_SOURCE
SYSCLK_SRC_OSC0
//#define CONFIG_SYSCLK_SOURCE
SYSCLK_SRC_PLL0
/* ===== PLL0 Options */
//#define CONFIG_PLL0_SOURCE
//#define CONFIG_PLL0_SOURCE
//#define CONFIG_PLL0_MUL
//#define CONFIG_PLL0_DIV
PLL_SRC_OSC0
PLL_SRC_OSC1
4 /* Fpll = (Fclk * PLL_mul) / PLL_div */
1 /* Fpll = (Fclk * PLL_mul) / PLL_div */
/* ===== PLL1 Options */
#define CONFIG_PLL1_SOURCE
//#define CONFIG_PLL1_SOURCE
#define CONFIG_PLL1_MUL
#define CONFIG_PLL1_DIV
PLL_SRC_OSC0
PLL_SRC_OSC1
8 /* Fpll = (Fclk * PLL_mul) / PLL_div */
2 /* Fpll = (Fclk * PLL_mul) / PLL_div */
/* ===== System Clock Bus Division Options */
//#define CONFIG_SYSCLK_CPU_DIV
0 /* Fcpu = Fsys/(2 ^ CPU_div) */
//#define CONFIG_SYSCLK_PBA_DIV
0 /* Fpba = Fsys/(2 ^ PBA_div) */
//#define CONFIG_SYSCLK_PBB_DIV
0 /* Fpbb = Fsys/(2 ^ PBB_div) */
/* ===== Peripheral Clock Management Options */
//#define CONFIG_SYSCLK_INIT_CPUMASK ((1 << SYSCLK_SYSTIMER) | (1 << SYSCLK_OCD))
//#define CONFIG_SYSCLK_INIT_PBAMASK (1 << SYSCLK_USART0)
//#define CONFIG_SYSCLK_INIT_PBBMASK (1 << SYSCLK_HMATRIX)
//#define CONFIG_SYSCLK_INIT_HSBMASK (1 << SYSCLK_MDMA_HSB)
/* ===== USB Clock Source Options */
//#define CONFIG_USBCLK_SOURCE
//#define CONFIG_USBCLK_SOURCE
#define CONFIG_USBCLK_SOURCE
#define CONFIG_USBCLK_DIV
USBCLK_SRC_OSC0
USBCLK_SRC_PLL0
USBCLK_SRC_PLL1
1 /* Fusb = Fsys/(2 ^ USB_div) */
#endif /* CONF_CLOCK_H_INCLUDED */
4.2.2.
AT32UC3A3 and AT32UC3A4 Devices (USBB with High Speed Support)
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel
Atmel AT09333: USB Host Interface (UHI) for Communication Class Device (CDC) [APPLICATION
NOTE]
Atmel-42338B-USB-Host-Interface-UHI-for-Communication-Class-Device-CDC_AT09333_Application Note-12/2015
17
Support</a>
*/
#ifndef CONF_CLOCK_H_INCLUDED
#define CONF_CLOCK_H_INCLUDED
/* ===== System Clock Source Options */
//#define CONFIG_SYSCLK_SOURCE
SYSCLK_SRC_RCSYS
//#define CONFIG_SYSCLK_SOURCE
SYSCLK_SRC_OSC0
#define CONFIG_SYSCLK_SOURCE
/* ===== PLL0 Options */
#define CONFIG_PLL0_SOURCE
//#define CONFIG_PLL0_SOURCE
#define CONFIG_PLL0_MUL
*/
#define CONFIG_PLL0_DIV
SYSCLK_SRC_PLL0
PLL_SRC_OSC0
PLL_SRC_OSC1
11 /* Fpll = (Fclk * PLL_mul) / PLL_div
2
/* Fpll = (Fclk * PLL_mul) / PLL_div
*/
/* ===== PLL1 Options */
//#define CONFIG_PLL1_SOURCE
//#define CONFIG_PLL1_SOURCE
//#define CONFIG_PLL1_MUL
//#define CONFIG_PLL1_DIV
PLL_SRC_OSC0
PLL_SRC_OSC1
8 /* Fpll = (Fclk * PLL_mul) / PLL_div */
2 /* Fpll = (Fclk * PLL_mul) / PLL_div */
/* ===== System Clock Bus Division Options */
#define CONFIG_SYSCLK_CPU_DIV
0 /* Fcpu = Fsys/(2 ^ CPU_div) */
#define CONFIG_SYSCLK_PBA_DIV
0 /* Fpba = Fsys/(2 ^ PBA_div) */
//#define CONFIG_SYSCLK_PBB_DIV
0 /* Fpbb = Fsys/(2 ^ PBB_div) */
/* ===== Peripheral Clock Management Options */
//#define CONFIG_SYSCLK_INIT_CPUMASK ((1 << SYSCLK_SYSTIMER) | (1 << SYSCLK_OCD))
//#define CONFIG_SYSCLK_INIT_PBAMASK (1 << SYSCLK_USART0)
//#define CONFIG_SYSCLK_INIT_PBBMASK (1 << SYSCLK_HMATRIX)
//#define CONFIG_SYSCLK_INIT_HSBMASK (1 << SYSCLK_MDMA_HSB)
/* ===== USB Clock Source Options */
#define CONFIG_USBCLK_SOURCE
//#define CONFIG_USBCLK_SOURCE
//#define CONFIG_USBCLK_SOURCE
#define CONFIG_USBCLK_DIV
USBCLK_SRC_OSC0
USBCLK_SRC_PLL0
USBCLK_SRC_PLL1
1 /* Fusb = Fsys/(2 ^ USB_div) */
#endif /* CONF_CLOCK_H_INCLUDED */
4.2.3.
AT32UC3C, ATUCXXD, ATUCXXL3U, ATUCXXL4U Devices (USBC)
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel
Support</a>
*/
#ifndef CONF_CLOCK_H_INCLUDED
#define CONF_CLOCK_H_INCLUDED
// ===== System Clock Source Options
//#define CONFIG_SYSCLK_SOURCE
//#define CONFIG_SYSCLK_SOURCE
//#define CONFIG_SYSCLK_SOURCE
SYSCLK_SRC_RCSYS
SYSCLK_SRC_OSC0
SYSCLK_SRC_OSC1
//#define CONFIG_SYSCLK_SOURCE
//#define CONFIG_SYSCLK_SOURCE
SYSCLK_SRC_PLL1
SYSCLK_SRC_RC8M
#define CONFIG_SYSCLK_SOURCE
SYSCLK_SRC_PLL0
// ===== PLL0 Options
Atmel AT09333: USB Host Interface (UHI) for Communication Class Device (CDC) [APPLICATION
NOTE]
Atmel-42338B-USB-Host-Interface-UHI-for-Communication-Class-Device-CDC_AT09333_Application Note-12/2015
18
#define CONFIG_PLL0_SOURCE
//#define CONFIG_PLL0_SOURCE
//#define CONFIG_PLL0_SOURCE
PLL_SRC_OSC0
#define CONFIG_PLL0_MUL
#define CONFIG_PLL0_DIV
PLL_SRC_OSC1
PLL_SRC_RC8M
3 /* Fpll = (Fclk * PLL_mul) / PLL_div */
1 /* Fpll = (Fclk * PLL_mul) / PLL_div */
// ===== PLL1 Options
//#define CONFIG_PLL1_SOURCE
//#define CONFIG_PLL1_SOURCE
//#define CONFIG_PLL1_SOURCE
//#define CONFIG_PLL1_MUL
//#define CONFIG_PLL1_DIV
PLL_SRC_OSC0
PLL_SRC_OSC1
PLL_SRC_RC8M
3 /* Fpll = (Fclk * PLL_mul) / PLL_div */
1 /* Fpll = (Fclk * PLL_mul) / PLL_div */
// ===== System Clock Bus Division Options
//#define CONFIG_SYSCLK_CPU_DIV
0 /* Fcpu = Fsys/(2 ^
//#define CONFIG_SYSCLK_PBA_DIV
0 /* Fpba = Fsys/(2 ^
//#define CONFIG_SYSCLK_PBB_DIV
0 /* Fpbb = Fsys/(2 ^
//#define CONFIG_SYSCLK_PBC_DIV
0 /* Fpbc = Fsys/(2 ^
CPU_div)
PBA_div)
PBB_div)
PBC_div)
*/
*/
*/
*/
// ===== Peripheral Clock Management Options
//#define CONFIG_SYSCLK_INIT_CPUMASK ((1 << SYSCLK_SYSTIMER) | (1 << SYSCLK_OCD))
//#define CONFIG_SYSCLK_INIT_PBAMASK (1 << SYSCLK_USART0)
//#define CONFIG_SYSCLK_INIT_PBBMASK (1 << SYSCLK_HMATRIX)
//#define CONFIG_SYSCLK_INIT_HSBMASK (1 << SYSCLK_MDMA_HSB)
// ===== USB Clock Source Options
//#define CONFIG_USBCLK_SOURCE
//#define CONFIG_USBCLK_SOURCE
#define CONFIG_USBCLK_SOURCE
//#define CONFIG_USBCLK_SOURCE
#define CONFIG_USBCLK_DIV
USBCLK_SRC_OSC0
USBCLK_SRC_OSC1
USBCLK_SRC_PLL0
USBCLK_SRC_PLL1
1 /* Fusb = Fsys/(2 ^ USB_div) */
#endif /* CONF_CLOCK_H_INCLUDED */
4.2.4.
SAM3X and SAM3A Devices (UOTGHS: USB OTG High Speed)
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel
Support</a>
*/
#ifndef CONF_CLOCK_H_INCLUDED
#define CONF_CLOCK_H_INCLUDED
/* ===== System Clock (MCK) Source Options */
//#define CONFIG_SYSCLK_SOURCE
SYSCLK_SRC_SLCK_RC
//#define CONFIG_SYSCLK_SOURCE
SYSCLK_SRC_SLCK_XTAL
//#define CONFIG_SYSCLK_SOURCE
SYSCLK_SRC_SLCK_BYPASS
//#define CONFIG_SYSCLK_SOURCE
SYSCLK_SRC_MAINCK_4M_RC
//#define CONFIG_SYSCLK_SOURCE
SYSCLK_SRC_MAINCK_8M_RC
//#define CONFIG_SYSCLK_SOURCE
SYSCLK_SRC_MAINCK_12M_RC
//#define CONFIG_SYSCLK_SOURCE
SYSCLK_SRC_MAINCK_XTAL
//#define CONFIG_SYSCLK_SOURCE
SYSCLK_SRC_MAINCK_BYPASS
#define CONFIG_SYSCLK_SOURCE
//#define CONFIG_SYSCLK_SOURCE
SYSCLK_SRC_PLLACK
SYSCLK_SRC_UPLLCK
/* ===== System Clock (MCK) Prescaler Options
(Fmck = Fsys / (SYSCLK_PRES)) */
//#define CONFIG_SYSCLK_PRES
SYSCLK_PRES_1
#define CONFIG_SYSCLK_PRES
//#define CONFIG_SYSCLK_PRES
//#define CONFIG_SYSCLK_PRES
//#define CONFIG_SYSCLK_PRES
SYSCLK_PRES_2
SYSCLK_PRES_4
SYSCLK_PRES_8
SYSCLK_PRES_16
Atmel AT09333: USB Host Interface (UHI) for Communication Class Device (CDC) [APPLICATION
NOTE]
Atmel-42338B-USB-Host-Interface-UHI-for-Communication-Class-Device-CDC_AT09333_Application Note-12/2015
19
//#define CONFIG_SYSCLK_PRES
//#define CONFIG_SYSCLK_PRES
//#define CONFIG_SYSCLK_PRES
SYSCLK_PRES_32
SYSCLK_PRES_64
SYSCLK_PRES_3
/* ===== PLL0 (A) Options
(Fpll = (Fclk * PLL_mul) / PLL_div)
Use mul and div effective values here. */
#define CONFIG_PLL0_SOURCE
#define CONFIG_PLL0_MUL
#define CONFIG_PLL0_DIV
PLL_SRC_MAINCK_XTAL
14
1
/* ===== UPLL (UTMI) Hardware fixed at 480MHz. */
/* ===== USB Clock Source Options
(Fusb = FpllX / USB_div)
Use div effective value here. */
//#define CONFIG_USBCLK_SOURCE
USBCLK_SRC_PLL0
#define CONFIG_USBCLK_SOURCE
#define CONFIG_USBCLK_DIV
USBCLK_SRC_UPLL
1
/*
===== Target frequency (System clock)
- XTAL frequency: 12MHz
- System clock source: PLLA
- System clock prescaler: 2 (divided by 2)
- PLLA source: XTAL
- PLLA output: XTAL * 14 / 1
- System clock is: 12 * 14 / 1 /2 = 84MHz
===== Target frequency (USB Clock)
- USB clock source: UPLL
- USB clock divider: 1 (not divided)
- UPLL frequency: 480MHz
- USB clock: 480 / 1 = 480MHz
*/
#endif /* CONF_CLOCK_H_INCLUDED */
4.3.
conf_clocks.h
4.3.1.
SAM D21 Devices (USB)
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel
Support</a>
*/
#include <clock.h>
#ifndef CONF_CLOCKS_H_INCLUDED
# define CONF_CLOCKS_H_INCLUDED
/* System clock bus configuration */
#
#
#
#
#
#
define
define
define
define
define
define
CONF_CLOCK_CPU_CLOCK_FAILURE_DETECT
CONF_CLOCK_FLASH_WAIT_STATES
CONF_CLOCK_CPU_DIVIDER
CONF_CLOCK_APBA_DIVIDER
CONF_CLOCK_APBB_DIVIDER
CONF_CLOCK_APBC_DIVIDER
false
2
SYSTEM_MAIN_CLOCK_DIV_1
SYSTEM_MAIN_CLOCK_DIV_1
SYSTEM_MAIN_CLOCK_DIV_1
SYSTEM_MAIN_CLOCK_DIV_1
/* SYSTEM_CLOCK_SOURCE_OSC8M configuration - Internal 8MHz oscillator */
#
#
#
define CONF_CLOCK_OSC8M_PRESCALER
define CONF_CLOCK_OSC8M_ON_DEMAND
define CONF_CLOCK_OSC8M_RUN_IN_STANDBY
SYSTEM_OSC8M_DIV_1
true
true
Atmel AT09333: USB Host Interface (UHI) for Communication Class Device (CDC) [APPLICATION
NOTE]
Atmel-42338B-USB-Host-Interface-UHI-for-Communication-Class-Device-CDC_AT09333_Application Note-12/2015
20
/* SYSTEM_CLOCK_SOURCE_XOSC configuration - External clock/oscillator */
# define CONF_CLOCK_XOSC_ENABLE
# define CONF_CLOCK_XOSC_EXTERNAL_CRYSTAL
SYSTEM_CLOCK_EXTERNAL_CRYSTAL
# define CONF_CLOCK_XOSC_EXTERNAL_FREQUENCY
# define CONF_CLOCK_XOSC_STARTUP_TIME
# define CONF_CLOCK_XOSC_AUTO_GAIN_CONTROL
# define CONF_CLOCK_XOSC_ON_DEMAND
# define CONF_CLOCK_XOSC_RUN_IN_STANDBY
false
12000000UL
SYSTEM_XOSC_STARTUP_32768
true
true
false
/* SYSTEM_CLOCK_SOURCE_XOSC32K configuration - External 32KHz crystal/clock
oscillator */
# define CONF_CLOCK_XOSC32K_ENABLE
true
# define CONF_CLOCK_XOSC32K_EXTERNAL_CRYSTAL
SYSTEM_CLOCK_EXTERNAL_CRYSTAL
# define CONF_CLOCK_XOSC32K_STARTUP_TIME
SYSTEM_XOSC32K_STARTUP_65536
# define CONF_CLOCK_XOSC32K_AUTO_AMPLITUDE_CONTROL false
# define CONF_CLOCK_XOSC32K_ENABLE_1KHZ_OUPUT
false
# define CONF_CLOCK_XOSC32K_ENABLE_32KHZ_OUTPUT true
# define CONF_CLOCK_XOSC32K_ON_DEMAND
false
# define CONF_CLOCK_XOSC32K_RUN_IN_STANDBY
true
/* SYSTEM_CLOCK_SOURCE_OSC32K configuration - Internal 32KHz oscillator */
#
#
#
#
#
#
define
define
define
define
define
define
CONF_CLOCK_OSC32K_ENABLE
CONF_CLOCK_OSC32K_STARTUP_TIME
CONF_CLOCK_OSC32K_ENABLE_1KHZ_OUTPUT
CONF_CLOCK_OSC32K_ENABLE_32KHZ_OUTPUT
CONF_CLOCK_OSC32K_ON_DEMAND
CONF_CLOCK_OSC32K_RUN_IN_STANDBY
false
SYSTEM_OSC32K_STARTUP_130
false
true
true
false
/* SYSTEM_CLOCK_SOURCE_DFLL configuration - Digital Frequency Locked Loop */
# define CONF_CLOCK_DFLL_ENABLE
# define CONF_CLOCK_DFLL_LOOP_MODE
SYSTEM_CLOCK_DFLL_LOOP_MODE_CLOSED
# define CONF_CLOCK_DFLL_ON_DEMAND
/* DFLL open loop mode configuration */
#
define CONF_CLOCK_DFLL_FINE_VALUE
/* DFLL closed loop mode configuration */
#
#
#
#
#
#
#
#
define
define
define
define
define
define
define
define
CONF_CLOCK_DFLL_SOURCE_GCLK_GENERATOR
CONF_CLOCK_DFLL_MULTIPLY_FACTOR
CONF_CLOCK_DFLL_QUICK_LOCK
CONF_CLOCK_DFLL_TRACK_AFTER_FINE_LOCK
CONF_CLOCK_DFLL_KEEP_LOCK_ON_WAKEUP
CONF_CLOCK_DFLL_ENABLE_CHILL_CYCLE
CONF_CLOCK_DFLL_MAX_COARSE_STEP_SIZE
CONF_CLOCK_DFLL_MAX_FINE_STEP_SIZE
true
true
(512)
GCLK_GENERATOR_1
(48000000/32768)
true
true
true
true
(0x1f / 8)
(0xff / 8)
/* SYSTEM_CLOCK_SOURCE_DPLL configuration - Digital Phase-Locked Loop */
#
#
#
#
#
#
define
define
define
define
define
define
CONF_CLOCK_DPLL_ENABLE
CONF_CLOCK_DPLL_ON_DEMAND
CONF_CLOCK_DPLL_RUN_IN_STANDBY
CONF_CLOCK_DPLL_LOCK_BYPASS
CONF_CLOCK_DPLL_WAKE_UP_FAST
CONF_CLOCK_DPLL_LOW_POWER_ENABLE
false
false
true
false
false
true
# define CONF_CLOCK_DPLL_LOCK_TIME
SYSTEM_CLOCK_SOURCE_DPLL_LOCK_TIME_DEFAULT
# define CONF_CLOCK_DPLL_REFERENCE_CLOCK
Atmel AT09333: USB Host Interface (UHI) for Communication Class Device (CDC) [APPLICATION
NOTE]
Atmel-42338B-USB-Host-Interface-UHI-for-Communication-Class-Device-CDC_AT09333_Application Note-12/2015
21
SYSTEM_CLOCK_SOURCE_DPLL_REFERENCE_CLOCK_XOSC32K
# define CONF_CLOCK_DPLL_FILTER
SYSTEM_CLOCK_SOURCE_DPLL_FILTER_DEFAULT
#
#
#
define CONF_CLOCK_DPLL_REFERENCE_FREQUENCY
define CONF_CLOCK_DPLL_REFERENCE_DIVIDER
define CONF_CLOCK_DPLL_OUTPUT_FREQUENCY
/* DPLL GCLK reference configuration */
#
define CONF_CLOCK_DPLL_REFERENCE_GCLK_GENERATOR
/* DPLL GCLK lock timer configuration */
#
32768
1
48000000
define CONF_CLOCK_DPLL_LOCK_GCLK_GENERATOR
GCLK_GENERATOR_1
GCLK_GENERATOR_1
/* Set this to true to configure the GCLK when running clocks_init. If set to
* false, none of the GCLK generators will be configured in clocks_init(). */
#
define CONF_CLOCK_CONFIGURE_GCLK
/* Configure GCLK generator 0 (Main Clock) */
#
#
#
#
#
define
define
define
define
define
CONF_CLOCK_GCLK_0_ENABLE
CONF_CLOCK_GCLK_0_RUN_IN_STANDBY
CONF_CLOCK_GCLK_0_CLOCK_SOURCE
CONF_CLOCK_GCLK_0_PRESCALER
CONF_CLOCK_GCLK_0_OUTPUT_ENABLE
/* Configure GCLK generator 1 */
# define CONF_CLOCK_GCLK_1_ENABLE
# define CONF_CLOCK_GCLK_1_RUN_IN_STANDBY
# define CONF_CLOCK_GCLK_1_CLOCK_SOURCE
SYSTEM_CLOCK_SOURCE_XOSC32K
# define CONF_CLOCK_GCLK_1_PRESCALER
# define CONF_CLOCK_GCLK_1_OUTPUT_ENABLE
/* Configure GCLK generator 2 (RTC) */
# define CONF_CLOCK_GCLK_2_ENABLE
# define CONF_CLOCK_GCLK_2_RUN_IN_STANDBY
# define CONF_CLOCK_GCLK_2_CLOCK_SOURCE
SYSTEM_CLOCK_SOURCE_OSC32K
# define CONF_CLOCK_GCLK_2_PRESCALER
# define CONF_CLOCK_GCLK_2_OUTPUT_ENABLE
/* Configure GCLK generator 3 */
#
#
#
#
#
define
define
define
define
define
CONF_CLOCK_GCLK_3_ENABLE
CONF_CLOCK_GCLK_3_RUN_IN_STANDBY
CONF_CLOCK_GCLK_3_CLOCK_SOURCE
CONF_CLOCK_GCLK_3_PRESCALER
CONF_CLOCK_GCLK_3_OUTPUT_ENABLE
/* Configure GCLK generator 4 */
#
#
#
#
#
define
define
define
define
define
CONF_CLOCK_GCLK_4_ENABLE
CONF_CLOCK_GCLK_4_RUN_IN_STANDBY
CONF_CLOCK_GCLK_4_CLOCK_SOURCE
CONF_CLOCK_GCLK_4_PRESCALER
CONF_CLOCK_GCLK_4_OUTPUT_ENABLE
/* Configure GCLK generator 5 */
#
#
#
#
#
define
define
define
define
define
CONF_CLOCK_GCLK_5_ENABLE
CONF_CLOCK_GCLK_5_RUN_IN_STANDBY
CONF_CLOCK_GCLK_5_CLOCK_SOURCE
CONF_CLOCK_GCLK_5_PRESCALER
CONF_CLOCK_GCLK_5_OUTPUT_ENABLE
true
true
true
SYSTEM_CLOCK_SOURCE_DFLL
1
false
true
false
1
false
false
false
32
false
false
false
SYSTEM_CLOCK_SOURCE_OSC8M
1
false
false
false
SYSTEM_CLOCK_SOURCE_OSC8M
1
false
false
false
SYSTEM_CLOCK_SOURCE_OSC8M
1
false
/* Configure GCLK generator 6 */
Atmel AT09333: USB Host Interface (UHI) for Communication Class Device (CDC) [APPLICATION
NOTE]
Atmel-42338B-USB-Host-Interface-UHI-for-Communication-Class-Device-CDC_AT09333_Application Note-12/2015
22
#
#
#
#
#
define
define
define
define
define
CONF_CLOCK_GCLK_6_ENABLE
CONF_CLOCK_GCLK_6_RUN_IN_STANDBY
CONF_CLOCK_GCLK_6_CLOCK_SOURCE
CONF_CLOCK_GCLK_6_PRESCALER
CONF_CLOCK_GCLK_6_OUTPUT_ENABLE
/* Configure GCLK generator 7 */
#
#
#
#
#
define
define
define
define
define
CONF_CLOCK_GCLK_7_ENABLE
CONF_CLOCK_GCLK_7_RUN_IN_STANDBY
CONF_CLOCK_GCLK_7_CLOCK_SOURCE
CONF_CLOCK_GCLK_7_PRESCALER
CONF_CLOCK_GCLK_7_OUTPUT_ENABLE
/* Configure GCLK generator 8 */
#
#
#
#
#
define
define
define
define
define
CONF_CLOCK_GCLK_8_ENABLE
CONF_CLOCK_GCLK_8_RUN_IN_STANDBY
CONF_CLOCK_GCLK_8_CLOCK_SOURCE
CONF_CLOCK_GCLK_8_PRESCALER
CONF_CLOCK_GCLK_8_OUTPUT_ENABLE
false
false
SYSTEM_CLOCK_SOURCE_OSC8M
1
false
false
false
SYSTEM_CLOCK_SOURCE_OSC8M
1
false
false
false
SYSTEM_CLOCK_SOURCE_OSC8M
1
false
#endif /* CONF_CLOCKS_H_INCLUDED */
4.4.
conf_board.h
4.4.1.
AT32UC3A0, AT32UC3A1, AT32UC3B Devices (USBB)
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel
Support</a>
*/
#ifndef CONF_BOARD_H_INCLUDED
#define CONF_BOARD_H_INCLUDED
/* Enable UART Port */
#define CONF_BOARD_COM_PORT
#endif /* CONF_BOARD_H_INCLUDED */
4.4.2.
AT32UC3A3 and AT32UC3A4 Devices (USBB with High Speed Support)
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel
Support</a>
*/
#ifndef CONF_BOARD_H_INCLUDED
#define CONF_BOARD_H_INCLUDED
/* Enable UART Port */
#define CONF_BOARD_COM_PORT
#endif /* CONF_BOARD_H_INCLUDED */
4.4.3.
AT32UC3C, ATUCXXD, ATUCXXL3U, ATUCXXL4U Devices (USBC)
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel
Atmel AT09333: USB Host Interface (UHI) for Communication Class Device (CDC) [APPLICATION
NOTE]
Atmel-42338B-USB-Host-Interface-UHI-for-Communication-Class-Device-CDC_AT09333_Application Note-12/2015
23
Support</a>
*/
#ifndef CONF_BOARD_H_INCLUDED
#define CONF_BOARD_H_INCLUDED
// Enable UART Port
#define CONF_BOARD_COM_PORT
#endif /* CONF_BOARD_H_INCLUDED */
4.4.4.
SAM3X and SAM3A Devices (UOTGHS: USB OTG High Speed)
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel
Support</a>
*/
#ifndef CONF_BOARD_H_INCLUDED
#define CONF_BOARD_H_INCLUDED
/* Pins description corresponding to Rxd,Txd, (UART pins) */
#define CONSOLE_PINS
{PINS_UART}
/* Usart Hw ID used by the console (UART0) */
#define CONSOLE_UART_ID
ID_UART
/* Configure UART pins */
#define CONF_BOARD_UART_CONSOLE
/* Configure ADC example pins */
//#define CONF_BOARD_ADC
/* Configure PWM LED0 pin */
//#define CONF_BOARD_PWM_LED0
/* Configure PWM LED1 pin */
//#define CONF_BOARD_PWM_LED1
/* Configure PWM LED2 pin */
//#define CONF_BOARD_PWM_LED2
/* Configure SPI0 pins */
//#define CONF_BOARD_SPI0
//#define CONF_BOARD_SPI0_NPCS0
//#define CONF_BOARD_SPI0_NPCS1
//#define CONF_BOARD_SPI0_NPCS2
//#define CONF_BOARD_SPI0_NPCS3
/* Configure SPI1 pins */
//#define CONF_BOARD_SPI1
//#define CONF_BOARD_SPI1_NPCS0
//#define CONF_BOARD_SPI1_NPCS1
//#define CONF_BOARD_SPI1_NPCS2
//#define CONF_BOARD_SPI1_NPCS3
//#define CONF_BOARD_TWI0
//#define CONF_BOARD_TWI1
/* Configure USART RXD pin */
//#define CONF_BOARD_USART_RXD
Atmel AT09333: USB Host Interface (UHI) for Communication Class Device (CDC) [APPLICATION
NOTE]
Atmel-42338B-USB-Host-Interface-UHI-for-Communication-Class-Device-CDC_AT09333_Application Note-12/2015
24
/* Configure USART TXD pin */
//#define CONF_BOARD_USART_TXD
/* Configure USART CTS pin */
//#define CONF_BOARD_USART_CTS
/* Configure USART RTS pin */
//#define CONF_BOARD_USART_RTS
/* Configure USART synchronous communication SCK pin */
//#define CONF_BOARD_USART_SCK
/* Configure ADM3312 enable pin */
//#define CONF_BOARD_ADM3312_EN
/* Configure IrDA transceiver shutdown pin */
//#define CONF_BOARD_TFDU4300_SD
/* Configure RS485 transceiver ADM3485 RE pin */
//#define CONF_BOARD_ADM3485_RE
//#define CONF_BOARD_SMC_PSRAM
/* Configure LCD EBI pins */
//#define CONF_BOARD_HX8347A
/* Configure Backlight control pin */
//#define CONF_BOARD_AAT3194
/* Configure USB pins */
#define CONF_BOARD_USB_PORT
#endif /* CONF_BOARD_H_INCLUDED */
4.4.5.
SAM D21 Devices (USB)
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel
Support</a>
*/
#ifndef CONF_BOARD_H_INCLUDED
#define CONF_BOARD_H_INCLUDED
/* Enable USB VBUS detect */
#define CONF_BOARD_USB_VBUS_DETECT
/* ID detect enabled */
#define CONF_BOARD_USB_ID_DETECT
#endif /* CONF_BOARD_H_INCLUDED */
Atmel AT09333: USB Host Interface (UHI) for Communication Class Device (CDC) [APPLICATION
NOTE]
Atmel-42338B-USB-Host-Interface-UHI-for-Communication-Class-Device-CDC_AT09333_Application Note-12/2015
25
5.
USB Host Basic Setup
5.1.
USB Host User Configuration
The following USB host configuration must be included in the conf_usb_host.h file of the application:
1. USB_HOST_UHI (List of UHI APIs).
Define the list of UHI supported by USB host. (E.g.: UHI_MSC, UHI_HID_MOUSE).
2. USB_HOST_POWER_MAX (mA).
Maximum current allowed on Vbus.
3. USB_HOST_HS_SUPPORT (Only defined).
Authorize the USB host to run in High Speed.
4. USB_HOST_HUB_SUPPORT (Only defined).
Authorize the USB HUB support.
5.2.
USB Host User Callback
The following optional USB host callback can be defined in the conf_usb_host.h file of the application:
1. void UHC_MODE_CHANGE (bool b_host_mode).
To notify that the USB mode are switched automatically. This is possible only when ID pin is available.
2. void UHC_VBUS_CHANGE (bool b_present).
To notify that the Vbus level has changed (Available only in USB hardware with Vbus monitoring).
3. void UHC_VBUS_ERROR (void).
To notify that a Vbus error has occurred (Available only in USB hardware with Vbus monitoring).
4. void UHC_CONNECTION_EVENT (uhc_device_t* dev, bool b_present).
To notify that a device has been connected or disconnected.
5. void UHC_WAKEUP_EVENT (void).
Called when a USB device or the host have wake up the USB line.
6. void UHC_SOF_EVENT (void).
Called for each received SOF each 1ms. Available in High and Full speed mode.
7. uint8_t UHC_DEVICE_CONF (uhc_device_t* dev).
Called when a USB device configuration must be chosen. Thus, the application can choose either a
configuration number for this device or a configuration number 0 to reject it. If callback not defined the
configuration 1 is chosen.
8. void UHC_ENUM_EVENT (uhc_device_t* dev, uint8_t b_status).
Called when a USB device enumeration is completed or failed.
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5.3.
USB Host Setup Steps
5.3.1.
USB Host Controller (UHC) - Prerequisites
Common prerequisites for all USB hosts.
®
This module is based on USB host stack full interrupt driven and supporting sleepmgr. For AVR and
®
®
Atmel | SMART ARM -based SAM3/4 devices the clock services is supported. For SAM D21 devices the
clock driver is supported.
The following procedure must be executed to setup the project correctly:
•
Specify the clock configuration:
•
UC3 and SAM3/4 devices without USB high speed support need 48MHz clock input. You
must use a PLL and an external OSC.
•
UC3 and SAM3/4 devices with USB high speed support need 12MHz clock input. You must
use an external OSC.
•
UC3 devices with USBC hardware need CPU frequency higher than 25MHz
•
SAM D21 devices without USB high speed support need 48MHz clock input. You must use a
DFLL and an external OSC.
•
In conf_board.h, the define CONF_BOARD_USB_PORT must be added to enable USB lines. (Not
mandatory for all boards).
•
Enable interrupts
•
Initialize the clock service
The usage of sleep manager service is optional, but recommended to reduce power consumption:
•
Initialize the sleep manager service
•
Activate sleep mode when the application is in IDLE state
For AVR and SAM3/4 devices, add to the initialization code:
sysclk_init();
irq_initialize_vectors();
cpu_irq_enable();
board_init();
sleepmgr_init(); // Optional
For SAM D21 devices, add to the initialization code:
system_init();
irq_initialize_vectors();
cpu_irq_enable();
sleepmgr_init(); // Optional
Add to the main IDLE loop:
sleepmgr_enter_sleep(); // Optional
5.3.2.
USB Host Controller (UHC) - Example Code
Common example code for all USB hosts.
Content of conf_usb_host.h:
#define USB_HOST_POWER_MAX
500
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Add to application C-file:
void usb_init(void)
{
}
5.3.3.
uhc_start();
USB Device Controller (UHC) - Workflow
Common workflow for all USB devices.
1.
Ensure that conf_usb_host.h is available and contains the following configuration which is the main
USB device configuration:
// Maximum current allowed on Vbus (mA) which depends of 5V generator
#define USB_HOST_POWER_MAX
2.
500 // (500mA)
Call the USB host stack start function to enable USB Host stack:
uhc_start();
5.4.
conf_clock.h Examples
Content of conf_clock.h for AT32UC3A0, AT32UC3A1, and AT32UC3B devices (USBB):
// Configuration based on 12MHz external OSC:
#define
#define
#define
#define
#define
CONFIG_PLL1_SOURCE
CONFIG_PLL1_MUL
CONFIG_PLL1_DIV
CONFIG_USBCLK_SOURCE
CONFIG_USBCLK_DIV
PLL_SRC_OSC0
8
2
USBCLK_SRC_PLL1
1 // Fusb = Fsys/(2 ^ USB_div)
Content of conf_clock.h for AT32UC3A3 and AT32UC3A4 devices (USBB with high speed support):
// Configuration based on 12MHz external OSC:
#define CONFIG_USBCLK_SOURCE
#define CONFIG_USBCLK_DIV
USBCLK_SRC_OSC0
1 // Fusb = Fsys/(2 ^ USB_div)
Content of conf_clock.h for AT32UC3C device (USBC):
// Configuration based on 12MHz external OSC:
#define
#define
#define
#define
#define
CONFIG_PLL1_SOURCE
CONFIG_PLL1_MUL
CONFIG_PLL1_DIV
CONFIG_USBCLK_SOURCE
CONFIG_USBCLK_DIV
PLL_SRC_OSC0
8
2
USBCLK_SRC_PLL1
1 // Fusb = Fsys/(2 ^ USB_div)
// CPU clock need of clock > 25MHz to run with USBC
#define CONFIG_SYSCLK_SOURCE
SYSCLK_SRC_PLL1
Content of conf_clock.h for SAM3X and SAM3A devices (UOTGHS: USB OTG High Speed):
// USB Clock Source fixed at UPLL.
#define CONFIG_USBCLK_SOURCE
#define CONFIG_USBCLK_DIV
USBCLK_SRC_UPLL
1
Content of conf_clocks.h for SAM D21 devices (USB):
// USB Clock Source fixed at DFLL.
// SYSTEM_CLOCK_SOURCE_XOSC32K configuration - External 32KHz crystal/clock
oscillator
#
define CONF_CLOCK_XOSC32K_ENABLE
true
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# define CONF_CLOCK_XOSC32K_EXTERNAL_CRYSTAL
SYSTEM_CLOCK_EXTERNAL_CRYSTAL
# define CONF_CLOCK_XOSC32K_STARTUP_TIME
SYSTEM_XOSC32K_STARTUP_65536
# define CONF_CLOCK_XOSC32K_AUTO_AMPLITUDE_CONTROL false
# define CONF_CLOCK_XOSC32K_ENABLE_1KHZ_OUPUT
false
# define CONF_CLOCK_XOSC32K_ENABLE_32KHZ_OUTPUT true
# define CONF_CLOCK_XOSC32K_ON_DEMAND
false
# define CONF_CLOCK_XOSC32K_RUN_IN_STANDBY
true
// SYSTEM_CLOCK_SOURCE_DFLL configuration - Digital Frequency Locked Loop
# define CONF_CLOCK_DFLL_ENABLE
# define CONF_CLOCK_DFLL_LOOP_MODE
SYSTEM_CLOCK_DFLL_LOOP_MODE_CLOSED
# define CONF_CLOCK_DFLL_ON_DEMAND
// DFLL closed loop mode configuration
#
#
#
#
#
#
#
#
define
define
define
define
define
define
define
define
CONF_CLOCK_DFLL_SOURCE_GCLK_GENERATOR
CONF_CLOCK_DFLL_MULTIPLY_FACTOR
CONF_CLOCK_DFLL_QUICK_LOCK
CONF_CLOCK_DFLL_TRACK_AFTER_FINE_LOCK
CONF_CLOCK_DFLL_KEEP_LOCK_ON_WAKEUP
CONF_CLOCK_DFLL_ENABLE_CHILL_CYCLE
CONF_CLOCK_DFLL_MAX_COARSE_STEP_SIZE
CONF_CLOCK_DFLL_MAX_FINE_STEP_SIZE
#
define CONF_CLOCK_CONFIGURE_GCLK
// Configure GCLK generator 0 (Main Clock)
#
#
#
#
#
define
define
define
define
define
CONF_CLOCK_GCLK_0_ENABLE
CONF_CLOCK_GCLK_0_RUN_IN_STANDBY
CONF_CLOCK_GCLK_0_CLOCK_SOURCE
CONF_CLOCK_GCLK_0_PRESCALER
CONF_CLOCK_GCLK_0_OUTPUT_ENABLE
// Configure GCLK generator 1
# define CONF_CLOCK_GCLK_1_ENABLE
# define CONF_CLOCK_GCLK_1_RUN_IN_STANDBY
# define CONF_CLOCK_GCLK_1_CLOCK_SOURCE
SYSTEM_CLOCK_SOURCE_XOSC32K
# define CONF_CLOCK_GCLK_1_PRESCALER
# define CONF_CLOCK_GCLK_1_OUTPUT_ENABLE
true
true
GCLK_GENERATOR_1
(48000000/32768)
true
true
true
true
(0x1f / 8)
(0xff / 8)
true
true
true
SYSTEM_CLOCK_SOURCE_DFLL
1
false
true
false
1
true
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6.
Document Revision History
Doc. Rev.
Date
Comments
42338B
12/2015
Fixed typos
42338A
12/2014
Initial release
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2015 Atmel Corporation. / Rev.: Atmel-42338B-USB-Host-Interface-UHI-for-Communication-Class-Device-CDC_AT09333_Application Note-12/2015
®
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