AN_266_FT_App_Music

APPLICATION NOTE
AN_266
FT_App_Music
Version 1.1
Document Reference No.: FT_000911
Issue Date: 2013-11-01
This document is to introduce the Music Demo Application. The objective of the Demo Application
is to enable users to become familiar with the usage of the FT800, the design flow, and display list
used to design the desired user interface or visual effect.
Use of FTDI devices in life support and/or safety applications is entirely at the user’s risk, and the
user agrees to defend, indemnify and hold FTDI harmless from any and all damages, claims, suits
or expense resulting from such use.
Future Technology Devices International Limited (FTDI)
Unit 1, 2 Seaward Place, Glasgow G41 1HH, United Kingdom
Tel.: +44 (0) 141 429 2777 Fax: + 44 (0) 141 429 2758
Web Site: http://ftdichip.com
Copyright © 2013 Future Technology Devices International Limited
Application Note
AN_266 FT_App_Music
Version 1.1
Document Reference No.: FT_000911 Clearance No.: FTDI# 361
Table of Contents
1
2
3
Introduction ................................................................................................................ 3
1.1
Overview .............................................................................................................. 3
1.2
Scope .................................................................................................................. 3
Display Requirements ................................................................................................... 4
2.1
Display and Menu .................................................................................................. 4
2.2
Opening Menu ....................................................................................................... 4
Design Flow ................................................................................................................. 5
3.1
4
5
6
FT Music Flowchart ................................................................................................ 6
Description of the Functional Blocks ................................................................................ 7
4.1
System Initilization ................................................................................................ 7
4.2
Info () .................................................................................................................. 8
4.3
Memory Loading .................................................................................................. 10
Working with Widgets and Sound Effects ....................................................................... 11
5.1
Volume Slider Widget........................................................................................... 11
5.2
Drawing the Keyboard Keys .................................................................................. 12
5.3
Drawing the Instrument Select Buttons .................................................................. 12
5.4
Sound Synthesis and Playback .............................................................................. 13
Contact Information ................................................................................................... 14
Appendix A– References .................................................................................................... 15
Document References .................................................................................................... 15
Acronyms and Abbreviations ........................................................................................... 15
Appendix B – List of Tables & Figures .................................................................................. 16
List of Figures ............................................................................................................... 16
Appendix C– Revision History ............................................................................................. 17
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Copyright © 2013 Future Technology Devices International Limited
Application Note
AN_266 FT_App_Music
Version 1.1
Document Reference No.: FT_000911 Clearance No.: FTDI# 361
1 Introduction
This design example demonstrates a simple music synthesizer using touch, graphic display and
audio playback on a FT800 platform.
In the Music application, different musical instrument sounds are selected from a touch menu. A
graphical touch keyboard generates tones. The audio is streamed to a speaker using the audio
engine.
Loading of the necessary elements to show and manipulate the graphics elements is as follows:



Draw graphics primitives directly through a display list
Incorporate display list commands to access sound and touch events through reads and
writes of the FT800 registers
Store the display list in DL_RAM
1.1 Overview
The document will provide information on drawing graphics elements through primitives, tagging
of audio and touch capabilities and the structure of display lists. In addition, this application note
outlines the general steps of the system design flow, display list creation and integrating the
display list with the system host computer/microcontroller.
1.2 Scope
This document can be used as a guide by designers to develop GUI applications by using FT800
with any MCU via SPI or I2C. Note that detailed documentation is available on
www.ftdichip.com/EVE.htm, including:





FT800 datasheet
Programming Guide covering EVE command language
AN_240 FT800 From the Ground Up
AN_245 VM800CB_SampleApp_PC_Introduction - covering detailed design flow with a PC
and USB to SPI bridge cable
AN_246 VM800CB_SampleApp_Arduino_Introduction – covering detailed design flow in an
Arduino platform
Note source code for the Music application is provided in sections 4 and 5, or at:
http://www.ftdichip.com/Support/SoftwareExamples/FT800_Projects.htm
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Copyright © 2013 Future Technology Devices International Limited
Application Note
AN_266 FT_App_Music
Version 1.1
Document Reference No.: FT_000911 Clearance No.: FTDI# 361
2
Display Requirements
This section describes some of the key components of the design.
2.1 Display and Menu
This application demonstrates the usage of built-in widgets such as buttons, keys, and slider. The
application draws piano keys on the screen with white and black buttons, a slider to control the
volume of the sound, buttons to play different chords and buttons to choose the type of musical
instrument to be played.
The application constantly monitors the display for touch input on the piano keys, instrument type,
volume control and chord select keys (sound frequency).
2.2 Opening Menu
App Music opens with a generic introduction screen that prompts the user to press dots on the
touchscreen for calibration. After the FTDI logo appears, pressing the start arrow starts App Music.
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Copyright © 2013 Future Technology Devices International Limited
Application Note
AN_266 FT_App_Music
Version 1.1
Document Reference No.: FT_000911 Clearance No.: FTDI# 361
3 Design Flow
Every EVE design follows the same basic principles as highlighted in Figure 3.1.
Select and configure your host port for controlling the FT800 then wake the device before
configuring the display. The creative part then revolves around the generation of the display list,
“** APPLICATION DATA **” in the figure below. There will be two lists. The active list and the
updated/next list are continually swapped to render the display. Note, header files map the
pseudo code of the design file of the display list to the FT800 instruction set, which is sent as the
data of the SPI (or I²C) packet (typically <1KB). As a result, with EVE's object oriented approach,
the FT800 is operating as an SPI peripheral while providing full display, audio, and touch
capabilities.
Hardware
SPI or I2C
GPIO for PD_n
Interrupt Input
Select MCU
Select Display,
Audio & Touch
Size = WQVGA, QVGA, up to 512 x 512
Resistive Touch
Audio Amplifier
Software
Configure MCU
Interface
SPI Mode Zero -or- I2C Address
Set Host MCU SPI Speed to 10MHz maximum
Little Endian Data Format
Wake-up
FT800
Toggle PD_n low for 20ms min., then high
Write 0x00, 0x00, 0x00 to wake FT800
Write 0x44, 0x00, 0x00 to select Ext Clock
Write 0x62, 0x00, 0x00 to select 48MHz
Host MCU SPI Speed can now go up to 30MHz
REG_PCLK = zero until after display parameters are set
Configure
Display
Set Screen Registers
Vertical – REG_VCYCLE, REG_VSIZE, REG_VSYNC0/1, REG_VOFFSET
Horizontal – REG_HCYCLE, REG_HSIZE, REG_HSYNC0/1, REG_HOFFSET
Configure
Touch and
Audio
Set Touch Registers
REG_TOUCH_MODE, REG_TOUCH_RZTHRESH, Others if necessary
Set Audio Register
REG_VOL_SOUND = zero
Write Initial
Display List &
Enable Display
Write
Application
Display List
Swap Display
LIsts
CLEAR_COLOUR_RGB(0,0,0)
CLEAR(1,1,1)
DISPLAY
SWAP_LIST
REG_PWM_DUTY – brightness, PWM_HZ, frequency
REG_GPIO – bit 7 = 1 – DISP
REG_PCLK = LCD dot/pixel clock frequency
CLEAR_COLOUR_RGB(0,0,0)
CLEAR(1,1,1)
** APPLICATION DATA **
DISPLAY
SWAP_LIST
Figure 3.1 Generic EVE Design Flow
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Copyright © 2013 Future Technology Devices International Limited
Application Note
AN_266 FT_App_Music
Version 1.1
Document Reference No.: FT_000911 Clearance No.: FTDI# 361
3.1 FT Music Flowchart
The flow chart below is specific to the App Music application. The application uses internal Graphic
RAM and SD card storage for storing bitmaps and audio files that may be seen and heard as the
application plays
Start
Set Track for Volume
adjuster
By using CMD_TRACK
Draw keys using
Rectangle for piano
keyboard
Place the Sound
Selection Menu Button
Place the Slider for
Volume adjustment
NO
Key In?
YES
Menu Key?
NO
Music key?
NO
Tracker?
YES
YES
YES
Show the menu with
Background piano
keyboard by
Using Edge Strip
Play the sound
By key tag the sound
pitch is different
Adjust the Volume
NO
NO
Key In?
YES
Change the instrument
sound
Display the constructed
display list
Figure 3.2 App Music Flowchart
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Copyright © 2013 Future Technology Devices International Limited
Application Note
AN_266 FT_App_Music
Version 1.1
Document Reference No.: FT_000911 Clearance No.: FTDI# 361
4 Description of the Functional Blocks
4.1 System Initilization
Configuration of the SPI master port is unique to each controller – different registers etc, but all
will require data to be sent Most Significant Bit (MSB) first with a little endian format.
The function labelled Ft_BootupConfig is generic to all applications and will start by toggling the
FT800 PD# pin to perform a power cycle.
/* Do a power cycle for safer side */
Ft_Gpu_Hal_Powercycle(phost,FT_TRUE);
Ft_Gpu_Hal_Rd16(phost,RAM_G);
/* Set the clk to external clock */
Ft_Gpu_HostCommand(phost,FT_GPU_EXTERNAL_OSC);
Ft_Gpu_Hal_Sleep(10);
/* Switch PLL output to 48MHz */
Ft_Gpu_HostCommand(phost,FT_GPU_PLL_48M);
Ft_Gpu_Hal_Sleep(10);
/* Do a core reset for safer side */
Ft_Gpu_HostCommand(phost,FT_GPU_CORE_RESET);
/* Access address 0 to wake up the FT800 */
Ft_Gpu_HostCommand(phost,FT_GPU_ACTIVE_M);
The internal PLL is then given a prompt by setting the clock register and PLL to 48 MHz.
Note 36MHz is possible but will have a knock on effect for the display timing parameters.
A software reset of the core is performed followed by a dummy read to address 0 to complete the
wake up sequence.
The FT800 GPIO lines are also controlled by writing to registers:
Ft_Gpu_Hal_Wr8(phost, REG_GPIO_DIR,0x80 | Ft_Gpu_Hal_Rd8(phost,REG_GPIO_DIR));
Ft_Gpu_Hal_Wr8(phost, REG_GPIO,0x080 | Ft_Gpu_Hal_Rd8(phost,REG_GPIO));
And these allow the display to be enabled.
To confirm the FT800 is awake and ready to start accepting display list information the identity
register is read in a loop until it reports back 0x7C. It will always be 0x7C if everything is awake
and functioning correctly.
ft_uint8_t chipid;
//Read Register ID to check if FT800 is ready.
chipid = Ft_Gpu_Hal_Rd8(phost, REG_ID);
while(chipid != 0x7C)
chipid = Ft_Gpu_Hal_Rd8(phost, REG_ID);
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Copyright © 2013 Future Technology Devices International Limited
Application Note
AN_266 FT_App_Music
Version 1.1
Document Reference No.: FT_000911 Clearance No.: FTDI# 361
Once the FT800 is awake the display may be configured through 13 register writes according to its
resolution. Resolution and timing data should be available in the display datasheet.
Ft_Gpu_Hal_Wr16(phost, REG_HCYCLE, FT_DispHCycle);
Ft_Gpu_Hal_Wr16(phost, REG_HOFFSET, FT_DispHOffset);
Ft_Gpu_Hal_Wr16(phost, REG_HSYNC0, FT_DispHSync0);
Ft_Gpu_Hal_Wr16(phost, REG_HSYNC1, FT_DispHSync1);
Ft_Gpu_Hal_Wr16(phost, REG_VCYCLE, FT_DispVCycle);
Ft_Gpu_Hal_Wr16(phost, REG_VOFFSET, FT_DispVOffset);
Ft_Gpu_Hal_Wr16(phost, REG_VSYNC0, FT_DispVSync0);
Ft_Gpu_Hal_Wr16(phost, REG_VSYNC1, FT_DispVSync1);
Ft_Gpu_Hal_Wr8(phost, REG_SWIZZLE, FT_DispSwizzle);
Ft_Gpu_Hal_Wr8(phost, REG_PCLK_POL, FT_DispPCLKPol);
Ft_Gpu_Hal_Wr8(phost, REG_PCLK,FT_DispPCLK);//after this display is visible on the LCD
Ft_Gpu_Hal_Wr16(phost, REG_HSIZE, FT_DispWidth);
Ft_Gpu_Hal_Wr16(phost, REG_VSIZE, FT_DispHeight);
To complete the configuration the touch controller should also be calibrated
/* Touch configuration - configure the resistance value to 1200 - this value is specific to
customer requirement and derived by experiment */
Ft_Gpu_Hal_Wr16(phost, REG_TOUCH_RZTHRESH,1200);
Ft_Gpu_Hal_Wr8(phost, REG_GPIO_DIR,0xff);
Ft_Gpu_Hal_Wr8(phost, REG_GPIO,0x0ff);
An optional step is present in this code to clear the screen so that no artefacts from bootup are
displayed.
/*It is optional to clear the screen here*/
Ft_Gpu_Hal_WrMem(phost, RAM_DL,(ft_uint8_t *)FT_DLCODE_BOOTUP,sizeof(FT_DLCODE_BOOTUP));
Ft_Gpu_Hal_Wr8(phost, REG_DLSWAP,DLSWAP_FRAME);
4.2 Info ()
This is a largely informational section of code and it starts by synchronising the physical xy
coordinates of the display’s touch layer with the display’s visual layer.
A display list is started and cleared:
Ft_Gpu_CoCmd_Dlstart(phost);
Ft_App_WrCoCmd_Buffer(phost,CLEAR(1,1,1));
Ft_App_WrCoCmd_Buffer(phost,COLOR_RGB(255,255,255));
A text instruction is printed on the display followed by the call to the internal calibrate function:
Ft_Gpu_CoCmd_Text(phost,FT_DispWidth/2,FT_DispHeight/2,26,OPT_CENTERX|OPT_CENTERY,"Please tap
on a dot");
Ft_Gpu_CoCmd_Calibrate(phost,0);
The display list is then terminated and swapped to allow the changes to take effect.
Ft_App_WrCoCmd_Buffer(phost,DISPLAY());
Ft_Gpu_CoCmd_Swap(phost);
Ft_App_Flush_Co_Buffer(phost);
Ft_Gpu_Hal_WaitCmdfifo_empty(phost);
Next up in the Info() function is the FTDI logo playback:
Ft_Gpu_CoCmd_Logo(phost);
Ft_App_Flush_Co_Buffer(phost);
Ft_Gpu_Hal_WaitCmdfifo_empty(phost);
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Copyright © 2013 Future Technology Devices International Limited
Application Note
AN_266 FT_App_Music
Version 1.1
Document Reference No.: FT_000911 Clearance No.: FTDI# 361
while(0!=Ft_Gpu_Hal_Rd16(phost,REG_CMD_READ));
dloffset = Ft_Gpu_Hal_Rd16(phost,REG_CMD_DL);
A composite image with the logo and a start arrow is then displayed to allow the user to start the
main application
do
{
Ft_Gpu_CoCmd_Dlstart(phost);
Ft_Gpu_CoCmd_Append(phost,100000L,dloffset);
Ft_App_WrCoCmd_Buffer(phost,BITMAP_TRANSFORM_A(256));
Ft_App_WrCoCmd_Buffer(phost,BITMAP_TRANSFORM_A(256));
Ft_App_WrCoCmd_Buffer(phost,BITMAP_TRANSFORM_B(0));
Ft_App_WrCoCmd_Buffer(phost,BITMAP_TRANSFORM_C(0));
Ft_App_WrCoCmd_Buffer(phost,BITMAP_TRANSFORM_D(0));
Ft_App_WrCoCmd_Buffer(phost,BITMAP_TRANSFORM_E(256));
Ft_App_WrCoCmd_Buffer(phost,BITMAP_TRANSFORM_F(0));
Ft_App_WrCoCmd_Buffer(phost,SAVE_CONTEXT());
Ft_App_WrCoCmd_Buffer(phost,COLOR_RGB(219,180,150));
Ft_App_WrCoCmd_Buffer(phost,COLOR_A(220));
Ft_App_WrCoCmd_Buffer(phost,BEGIN(EDGE_STRIP_A));
Ft_App_WrCoCmd_Buffer(phost,VERTEX2F(0,FT_DispHeight*16));
Ft_App_WrCoCmd_Buffer(phost,VERTEX2F(FT_DispWidth*16,FT_DispHeight*16));
Ft_App_WrCoCmd_Buffer(phost,COLOR_A(255));
Ft_App_WrCoCmd_Buffer(phost,RESTORE_CONTEXT());
Ft_App_WrCoCmd_Buffer(phost,COLOR_RGB(0,0,0));
// INFORMATION
Ft_Gpu_CoCmd_Text(phost,FT_DispWidth/2,20,28,OPT_CENTERX|OPT_CENTERY,info[0]);
Ft_Gpu_CoCmd_Text(phost,FT_DispWidth/2,60,26,OPT_CENTERX|OPT_CENTERY,info[1]);
Ft_Gpu_CoCmd_Text(phost,FT_DispWidth/2,90,26,OPT_CENTERX|OPT_CENTERY,info[2]);
Ft_Gpu_CoCmd_Text(phost,FT_DispWidth/2,120,26,OPT_CENTERX|OPT_CENTERY,info[3]);
Ft_Gpu_CoCmd_Text(phost,FT_DispWidth/2,FT_DispHeight-30,26,OPT_CENTERX|OPT_CENTERY,"Click
to play");
if(sk!='P')
Ft_App_WrCoCmd_Buffer(phost,COLOR_RGB(255,255,255));
else
Ft_App_WrCoCmd_Buffer(phost,COLOR_RGB(100,100,100));
Ft_App_WrCoCmd_Buffer(phost,BEGIN(FTPOINTS));
Ft_App_WrCoCmd_Buffer(phost,POINT_SIZE(20*16));
Ft_App_WrCoCmd_Buffer(phost,TAG('P'));
Ft_App_WrCoCmd_Buffer(phost,VERTEX2F((FT_DispWidth/2)*16,(FT_DispHeight-60)*16));
Ft_App_WrCoCmd_Buffer(phost,COLOR_RGB(180,35,35));
Ft_App_WrCoCmd_Buffer(phost,BEGIN(BITMAPS));
Ft_App_WrCoCmd_Buffer(phost,VERTEX2II((FT_DispWidth/2)-14,(FT_DispHeight-75),14,0));
Ft_App_WrCoCmd_Buffer(phost,DISPLAY());
Ft_Gpu_CoCmd_Swap(phost);
Ft_App_Flush_Co_Buffer(phost);
Ft_Gpu_Hal_WaitCmdfifo_empty(phost);
}while(Read_Keys()!='P');
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Copyright © 2013 Future Technology Devices International Limited
Application Note
AN_266 FT_App_Music
Version 1.1
Document Reference No.: FT_000911 Clearance No.: FTDI# 361
4.3 Memory Loading
The on board graphics RAM (GRAM) is used to store the JPEG data and the audio data.
The file is copied from the PC to the FT800 GRAM.
e.g. for the audio files, the function Load_afile is called with an address in the 256k Graphics RAM
to be written to.
void Load_afile(ft_uint32_t add, FILE *afile)
{
ft_uint8_t pbuff[512],temp[512],tval;
ft_uint16_t z = 0;
fread(pbuff,1,512,afile);
Ft_Gpu_Hal_WrMem(phost,add,pbuff,512L);
if ((add & 2047L) == 0)
// every 2kb update the bitmap
{
for(z=0;z<512L;z++)
{
tval = pbuff[z];
if (tval & 0x80L)
tval ^= 0x7fL;
temp[z] = tval;
}
Ft_Gpu_Hal_WrMem(phost,8192L,temp,512L);
// 11 bits of data
}
}
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Copyright © 2013 Future Technology Devices International Limited
Application Note
AN_266 FT_App_Music
Version 1.1
Document Reference No.: FT_000911 Clearance No.: FTDI# 361
5 Working with Widgets and Sound Effects
App Music makes use of built-in widgets such as the buttons, piano keys and a slider for volume as
shown in figure 5.1 The application constantly monitors the display for touch input on the piano
keys, instrument type, volume control and chord select keys (sound frequency).
Figure 5.1 App Music Display
5.1 Volume Slider Widget
You can specify the properties of the volume slider by using the Co-Processor Track widget
(CoCmd_Track). Speaker volume is set by the REG_VOL_SOUND register. Volume level can range
from 0 to 255.
Ft_Gpu_CoCmd_Dlstart(phost);
Ft_Gpu_CoCmd_Track(phost,200,20,100,10,'V');
// where ‘V’ is the Tag of the volume slider
Ft_App_Flush_Co_Buffer(phost);
Ft_Gpu_Hal_WaitCmdfifo_empty(phost);
Ft_Gpu_Hal_Wr8(phost,REG_VOL_SOUND,100);
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Copyright © 2013 Future Technology Devices International Limited
Application Note
AN_266 FT_App_Music
Version 1.1
Document Reference No.: FT_000911 Clearance No.: FTDI# 361
5.2 Drawing the Keyboard Keys
The buttons for the keyboard keys (see figure 5.1) are drawn by using the co-processor button
widget. (CoCmd Button)
void pbuttons(ft_uint8_t no,ft_uint16_t xx,ft_uint16_t y,ft_uint8_t
btspace,ft_uint8_t btw,ft_uint8_t bth,ft_uint8_t tag_no,ft_uint32_t
fgc1,ft_uint32_t fgc2,ft_uint8_t rtag)
{
ft_uint16_t x,z;
for(z=0;z<no;z++)
{
x = z*(btw+btspace)+xx;
rtag==(z+tag_no) ? Ft_Gpu_CoCmd_FgColor(phost,fgc1) :
Ft_Gpu_CoCmd_FgColor(phost,fgc2);
Ft_App_WrCoCmd_Buffer(phost,TAG(z+tag_no));
Ft_Gpu_CoCmd_Button(phost,x,y,btw,bth,16,OPT_FLAT,"");
}
Button Codes:
no
number of keys
xx,y
xy co-ordinates
btspace
space between keys
btw,bth
Button Width and Height
fgc1,fgc2
Foreground colors
tag_no
tag for keys
rtag
detecting tag
5.3 Drawing the Instrument Select Buttons
The following code configures the instrument select menu shown in figure 5.2. The co-processor
Dlstart and Track widgets are used.
const char *ins[] =
{"Harp","Xylophone","Tuba","Glockenspiel","Organ","Trumpet","Piano","Chimes",
"Musicbox","Ding" };
// Intial stage
instr = 0x40;
Volume = 100;
button_space = 2;
// space between buttons
button_w = (FT_DispWidth / 10)-button_space;
// Button width
button_h = (FT_DispHeight - (FT_DispHeight/3));
// Button Height
b1w = button_w/2;
b1h = button_h/2;
b1s = b1w+button_space;
// button width one
Ft_Gpu_CoCmd_Dlstart(phost);
Ft_Gpu_CoCmd_Track(phost,200,20,100,10,'V');
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Copyright © 2013 Future Technology Devices International Limited
Application Note
AN_266 FT_App_Music
Version 1.1
Document Reference No.: FT_000911 Clearance No.: FTDI# 361
Figure 5.2 Instrument Select Menu
5.4 Sound Synthesis and Playback
The sounds of musical instruments are synthesized by using the REG_SOUND, REG_PLAY and
REG_VOLUME_SOUND registers.
Mkeys = Ft_Gpu_Hal_Rd8(phost,REG_TOUCH_TAG);
Skeys = Read_Keys();
if(Skeys=='I'){Flag.sound = 1;
Mkeys = 0;}
if(Skeys>=100 && Flag.sound==1)
//Tagval from 100
{
Flag.sound = 0;
pk = (Skeys-100);
// assign the selection
instr = pk|0x40;
}
if(Mkeys > '0' && temp_keys!=Mkeys)
{
//
freq = Mkeys;
Ft_Gpu_Hal_Wr16(phost,REG_SOUND, 0x50 + (Mkeys-'0'));
Ft_Gpu_Hal_Wr8(phost,REG_PLAY,1);
}
if(Mkeys !=0 && Mkeys < 16 && temp_keys!=Mkeys)
{
Ft_Gpu_Hal_Wr16(phost,REG_SOUND,((Mkeys|50) << 8) | instr);
Ft_Gpu_Hal_Wr8(phost,REG_PLAY,1);
}
Read_Tag_val = Ft_Gpu_Hal_Rd32(phost,REG_TRACKER);
if((Read_Tag_val&0xff)=='V' && Flag.sound==0)
{
Volume = (Read_Tag_val>>24);
Ft_Gpu_Hal_Wr8(phost,REG_VOL_SOUND,Volume);
}
temp_keys=Mkeys;
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Copyright © 2013 Future Technology Devices International Limited
Application Note
AN_266 FT_App_Music
Version 1.1
Document Reference No.: FT_000911 Clearance No.: FTDI# 361
6 Contact Information
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Branch Office – Tigard, Oregon, USA
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Distributor and Sales Representatives
Please visit the Sales Network page of the FTDI Web site for the contact details of our distributor(s) and sales
representative(s) in your country.
System and equipment manufacturers and designers are responsible to ensure that their systems, and any Future Technology
Devices International Ltd (FTDI) devices incorporated in their systems, meet all applicable safety, regulatory and system-level
performance requirements. All application-related information in this document (including application descriptions, suggested
FTDI devices and other materials) is provided for reference only. While FTDI has taken care to assure it is accurate, this
information is subject to customer confirmation, and FTDI disclaims all liability for system designs and for any applications
assistance provided by FTDI. Use of FTDI devices in life support and/or safety applications is entirely at the user’s risk, and the
user agrees to defend, indemnify and hold harmless FTDI from any and all damages, claims, suits or expense resulting from
such use. This document is subject to change without notice. No freedom to use patents or other intellectual property rights is
implied by the publication of this document. Neither the whole nor any part of the information contained in, or the product
described in this document, may be adapted or reproduced in any material or electronic form without the prior written consent
of the copyright holder. Future Technology Devices International Ltd, Unit 1, 2 Seaward Place, Centurion Business Park,
Glasgow G41 1HH, United Kingdom. Scotland Registered Company Number: SC136640
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Copyright © 2013 Future Technology Devices International Limited
Application Note
AN_266 FT_App_Music
Version 1.1
Document Reference No.: FT_000911 Clearance No.: FTDI# 361
Appendix A– References
Document References
1.
2.
3.
4.
Datasheet for VM800C
Datasheet for VM800B
FT800 programmer guide FT_000793.
FT800 Embedded Video Engine Datasheet FT_000792
Acronyms and Abbreviations
Terms
Description
Arduino Pro
The open source platform variety based on ATMEL’s ATMEGA chipset
EVE
Embedded Video Engine
SPI
Serial Peripheral Interface
UI
User Interface
USB
Universal Serial Bus
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Copyright © 2013 Future Technology Devices International Limited
Application Note
AN_266 FT_App_Music
Version 1.1
Document Reference No.: FT_000911 Clearance No.: FTDI# 361
Appendix B – List of Tables & Figures
List of Figures
Figure 3.1 Generic EVE Design Flow ........................................................................... 5
Figure 3.2 App Music Flowchart ................................................................................. 6
Figure 5.1 App Music Display ................................................................................... 11
Figure 5.2 Instrument Select Menu ......................................................................... 13
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Copyright © 2013 Future Technology Devices International Limited
Application Note
AN_266 FT_App_Music
Version 1.1
Document Reference No.: FT_000911 Clearance No.: FTDI# 361
Appendix C– Revision History
Document Title:
AN_266 FT_App_Music
Document Reference No.:
FT_000911
Clearance No.:
FTDI# 361
Product Page:
http://www.ftdichip.com/EVE.htm
Document Feedback:
Send Feedback
Revision
Changes
Date
0.1
Initial draft release
2013-07-18
1.0
Version 1.0 updated wrt review comments
2013-08-21
1.1
Version 1.1
2012-11-01
17
Copyright © 2013 Future Technology Devices International Limited