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Fujitsu Semiconductor (Shanghai) Co., Ltd.
Application Note
MCU-AN-500084-E-10
F²MC-8FX FAMILY
8-BIT MICROCONTROLLER
MB95200H/210H SERIES
CAPACITANCE TOUCH SENSOR
APPLICATION NOTE
Capacitance Touch Sensor V1.0
Revision History
Revision History
Date
2010-04-14
Author
Ivan. Xiao
Change of Records
V1.0, First draft
This manual contains 42 pages.
1. The products described in this manual and the specifications thereof may be changed without prior notice.
To obtain up-to-date information and/or specifications, contact your Fujitsu sales representative or Fujitsu
authorized dealer.
2. Fujitsu will not be liable for infringement of copyright, industrial property right, or other rights of a third party
caused by the use of information or drawings described in this manual.
3. The contents of this manual may not be transferred or copied without the express permission of Fujitsu.
4. The products contained in this manual are not intended for use with equipments which require extremely
high reliability such as aerospace equipments, undersea repeaters, nuclear control systems or medical
equipments for life support.
5. Some of the products described in this manual may be strategic materials (or special technology) as defined
by the Foreign Exchange and Foreign Trade Control Law. In such cases, the products or portions thereof
must not be exported without permission as defined under the law.
© 2010 Fujitsu Semiconductor (Shanghai) Co., Ltd.
MCU-AN- 500084-E-10 – Page 2
Capacitance Touch Sensor V1.0
CONTENTS
CONTENTS
REVISION HISTORY .............................................................................................................. 2 CONTENTS ............................................................................................................................ 3 1 INTRODUCTION ................................................................................................................ 5 2 FUJITSU CAPACITANCE TOUCH SENSOR SOLUTION ................................................ 6 3 LIBRARY ........................................................................................................................... 8 3.1 Library Functions....................................................................................................... 8 3.2 FUJITSU TSC Performance.................................................................................... 12 3.3 How to Add Fujitsu TSC.lib ..................................................................................... 13 3.3.1 Add Fujitsu TSC.lib to User’s Project ........................................................ 13 3.3.2 Add "#include ‘TSC.h’" in c File ................................................................. 16 3.4 How to use Fujitsu TSC.lib ...................................................................................... 17 4 LIB USAGE NOTICE ....................................................................................................... 19 5 TSC GUI ........................................................................................................................... 21 5.1 Overview ................................................................................................................. 21 5.2 Open Software ........................................................................................................ 22 5.3 Check Threshold ..................................................................................................... 23 5.3.1 Overview ................................................................................................... 23 5.3.2 Check Start ............................................................................................... 24 5.3.3 Checking ................................................................................................... 25 5.3.4 Check Stop................................................................................................ 26 5.3.5 Calculate Threshold .................................................................................. 27 5.4 Test Threshold ........................................................................................................ 28 5.4.1 Overview ................................................................................................... 28 5.4.2 Test Start................................................................................................... 29 5.4.3 Testing ...................................................................................................... 30 5.4.4 Test Stop ................................................................................................... 31 5.5 Graph ...................................................................................................................... 32 5.5.1 Overview ................................................................................................... 32 5.5.2 Graph ........................................................................................................ 32 6 ADDITIONAL INFORMATION ......................................................................................... 33 7 APPENDIX ....................................................................................................................... 34 7.1 Index of Figures ...................................................................................................... 34 7.2 Index of Table ......................................................................................................... 34 MCU-AN- 500084-E-10 – Page 3
Capacitance Touch Sensor V1.0
CONTENTS
7.3 Sample Code .......................................................................................................... 36 MCU-AN- 500084-E-10 – Page 4
Capacitance Touch Sensor V1.0
Chapter 1 Introduction
1 Introduction
This application note describes FUJITSU TSC solution, and describes how to use TSC
library and TSC GUI.
Chapter 2 explains the working principles of TSC solution.
Chapter 3 explains how to use TSC library.
Chapter 4 explains LIB usage notice.
Chapter 5 explains how to use TSC GUI.
MCU-AN- 500084-E-10 – Page 5
Capacitance Touch Sensor V1.0
Chapter 2 FUJITSU Capacitance Touch Sensor Solution
2 FUJITSU Capacitance Touch Sensor Solution
This chapter introduces working principles of TSC solution.
The theory of capacitance touch sensor is to check capacitance increment. As follows, when
finger not touch the C = Cp, when touching the C = Cp +Cғ, and the increment is ΔC = Cғ.
Figure 2-1: Capacitance Touch Sensor Theory
According to the characteristics of capacitor, the deposited charge of capacitor increases
along with the increase of capacitance. FUJITSU uses A/D+GPIO method to check the
capacitance change. The method includes the following steps: GPIO output ‘H’, duration
20us, then GPIO input and A/D sampling.
Start
GPIO output ‘H’
Delay 20us
GPIO input
Switch to A/D
and sampling
Figure 2-2: Operation Flowchart
MCU-AN- 500084-E-10 – Page 6
Capacitance Touch Sensor V1.0
Chapter 2 FUJITSU Capacitance Touch Sensor Solution
Figure 2-3: Hardware Connection
During GPIO input, the voltage when C sensor is touched is higher than the case when it is
not touched.
Figure 2-4: Sketch Map
MCU-AN- 500084-E-10 – Page 7
Capacitance Touch Sensor V1.0
Chapter 3 Library
3 Library
This chapter introduces how to use TSC library.
Basing on MB95F204K, FUJITSU designs a 4-buttons TSC solution which provides a library
for user to use and a TSC GUI to test.
3.1
Library Functions
The library has 12 functions which are listed as follow.
Table 3-1: Functions
Function Name
Function
void TSC_init(void)
Initialize TSC
void button1_init(unsigned int threshold)
Set button1 threshold
void button2_init(unsigned int threshold)
Set button2 threshold
void button3_init(unsigned int threshold)
Set button3 threshold
void button4_init(unsigned int threshold)
Set button4 threshold
void UART_init(void)
Initialize and start serial port
void TBT_init(void)
Initialize and start Timebase Timer
unsigned char Get_Data(void)
Get check data
void Transmit(void)
Transmit data
unsigned char get_mode(void)
Get sensor mode
void set_mode(unsigned char set_mode)
Set sensor mode
void clear_check_data(void)
Clear check data
MCU-AN- 500084-E-10 – Page 8
Capacitance Touch Sensor V1.0
Chapter 3 Library
„ void TSC_init(void)
Table 3-2: TSC_init
Function Name
TSC_init
Description
Initialize IO which connect sensor, and initialize A/D.
Input
None
Return
None
„ void button1_init(unsigned int threshold)
Table 3-3: button1_init
Function Name
button1_init
Description
Set button1 threshold
Input
threshold: threshold value, and the type data from 1000 to
1120
Return
None
„ void button2_init(unsigned int threshold)
Table 3-4: button2_init
Function Name
button2_init
Description
Set button2 threshold
Input
threshold: threshold value, and the type data from 1000 to
1120
Return
None
„ void button3_init(unsigned int threshold)
Table 3-5: button3_init
Function Name
button3_init
Description
Set button3 threshold
Input
threshold: threshold value, and the type data from 1000 to
1120
Return
None
„ void button4_init(unsigned int threshold)
Table 3-6: button4_init
Function Name
button4_init
Description
Set button4 threshold
Input
threshold: threshold value, and the normal value from
1000 to 1120
Return
None
MCU-AN- 500084-E-10 – Page 9
Capacitance Touch Sensor V1.0
Chapter 3 Library
„ void UART_init(void)
Table 3-7: UART_init
Function Name
UART_init
Description
Initialize and start serial port, the data length is 8-bit, stop
bit length is 1-bit, parity is even parity, and the baud rate is
115200.
Input
None
Return
None
„ void TBT_init(void)
Table 3-8: TBT_init
Function Name
TBT_init
Description
Initialize and start Timebase Timer, the interval time is 2¹²
x 1/FCRH
Input
None
Return
None
„ void Transmit(void)
Table 3-9: Transmit
Function Name
Transmit
Description
Transmit check data to TSC GUI
Input
None
Return
None
„ unsigned char get_mode(void)
Table 3-10: get_mode
Function Name
get_mode
Description
Get current check mode
Input
None
Return
Return check mode:
0: highest mode, this mode only returns sensor number
which the maximum increment of voltage and over
threshold.
1: normal mode, this mode return all over threshold
sensor.
2: slippage mode, this mode checks slippage direction,
right or left.
MCU-AN- 500084-E-10 – Page 10
Capacitance Touch Sensor V1.0
Chapter 3 Library
„ unsigned char Get_Data(void)
Table 3-11: Get_Data
Function Name
Get_Data
Description
Get check data
Input
None
Return
Return sensor number or slippage direction. The returned
value varies with the mode.
highest mode:
1->button1,
2->button2,
3->button3,
4->button4,
0-> no button.
normal mode:
bit0-> button1,
bit1-> button2,
bit2-> button3,
bit3-> button4,
1: touching,
0: not touch.
slippage mode:
1: right,
2: left,
0: checking.
„ void set_mode(unsigned char set_mode)
Table 3-12: set_mode
Function Name
set_mode
Description
Set current check mode
Input
Set mode:
0: highest mode, this mode only returns sensor number
which the maximum increment of voltage and over
threshold.
1: normal mode, this mode return all over threshold
sensor.
2: slippage mode, this mode checks slippage direction,
right or left.
Return
None
MCU-AN- 500084-E-10 – Page 11
Capacitance Touch Sensor V1.0
Chapter 3 Library
„ void clear_check_data(void)
Table 3-13: clear_check_data
Function Name
clear_check_data
Description
Clear check data when checking
Input
None
Return
None
3.2
FUJITSU TSC Performance
Table 3-14: Performance
Resource
Amount
ROM
1272 Byte
Description
ROM space:
If just need support 1 sensor, ROM of lib can be
reduced to: 300 Byte
If just need support 2 sensors, ROM of lib can be
reduced to: 960 Byte
If just need support 3 sensors, ROM of lib can be
reduced to: 1120 Byte
If need support 4 sensors, ROM of Lib is: 1272 Byte
RAM
36 Byte
RAM space:
If just need support 1 sensor, RAM of lib can be
reduced to: 11 Byte
If just need support 2 sensors, RAM of lib can be
reduced to: 26 Byte
If just need support 3 sensors, RAM of lib can be
reduced to: 31 Byte
If need support 4 sensors, RAM of Lib is: 36 Byte
IO Port
4
P00~P02,P03
A/D
4
Channel 1,2,3,6(P00~P02,P03)
Timer
1
Timebase Timer
Serial Port
1
Serial Port(P04,P05),only use in check threshold mode
Machine Clock
>=8M
Scan 1 Key
2 ms
MCU-AN- 500084-E-10 – Page 12
Capacitance Touch Sensor V1.0
Chapter 3 Library
3.3
How to Add Fujitsu TSC.lib
3.3.1 Add Fujitsu TSC.lib to User’s Project
1. In Softune, right click Include Files and select Add member to folder > File from the
shortcut menu.
Figure 3-1: Select File
MCU-AN- 500084-E-10 – Page 13
Capacitance Touch Sensor V1.0
Chapter 3 Library
2. The TSC.lib can’t be found in window of Add Member.
Figure 3-2: open Add Member Window
3. In Add Member window, select ALL Files from Files of Type, and then you will find the
TSC.lib.
Figure 3-3: Select File Type
MCU-AN- 500084-E-10 – Page 14
Capacitance Touch Sensor V1.0
Chapter 3 Library
4. Then the TSC.lib could be found.
Figure 3-4: Show TSC.lib
5. Double click TSC.lib, and the TSC.lib will be added to Source Files.
Figure 3-5: Add TSC.lib
MCU-AN- 500084-E-10 – Page 15
Capacitance Touch Sensor V1.0
Chapter 3 Library
3.3.2 Add "#include ‘TSC.h’" in c File
1. Add "#include ‘TSC.h’" in c file, such as in "main.c ".
Figure 3-6: Add “#include “TSC.h "” in “main.c”
2. Compile the whole project, "TSC.h" will link TSC.lib to c file, so that user program can
use API functions in TSC.lib.
Figure 3-7: ‘#include ‘TSC.h’’ is Added Successfully
MCU-AN- 500084-E-10 – Page 16
Capacitance Touch Sensor V1.0
Chapter 3 Library
3.4
How to use Fujitsu TSC.lib
Using the library needs following step. First, initialize TSC main function, threshold and
Timebase Timer. If need to get the threshold, the UART needs to be initialized. Second, use
function “Get_data()” to get the check data. Timebase Timer interrupt checks sensor
function, and UART transmits the check data to TSC GUI.
„ Connect TSC GUI software flowchart
Start
Initialization ( TSC_init(),
button1_init(threshold),
button2_init(threshold),
button3_init(threshold),
button4_init(threshold),
UART_init(), TBT_init())
UART interrupt
Transmit
sampling
data to TSC
GUI
Timebase Timer interrupt
Get check value
(Get_Data()) and
main function
Interrupt end
Interrupt end
End
Figure 3-8: Get Threshold with GUI Flowchart
MCU-AN- 500084-E-10 – Page 17
Check which
sensor is being
touched
Capacitance Touch Sensor V1.0
Chapter 3 Library
„ Not connect TSC GUI software flowchart
Start
Initialization ( TSC_init(),
button1_init(threshold),
button2_init(threshold),
button3_init(threshold),
button4_init(threshold),
TBT_init())
Timebase Timer interrupt
Get check value
(Get_Data()) and
main function
Interrupt end
End
Figure 3-9: Working Flowchart
MCU-AN- 500084-E-10 – Page 18
Check which
sensor is being
touched
Capacitance Touch Sensor V1.0
Chapter 4 LIB Usage Notice
4 LIB Usage Notice
This chapter introduces LIB usage notice.
Machine clock
„
The machine clock should be set to 8M or above. If the machine clock is less than 8M, the
sensor response is slow.
„ Interrupt
This solution needs to use Timebase Timer interrupt to check sensor, and the interval time is
512us. It is unnecessary to use UART if the threshold is not gotten or tested with TSC GUI,
and the interrupt setting in “vector.c” is as following:
#include "mb95200.h"
#include "TSC.h"
…
void InitIrqLevels(void)
{
…
#ifdef enableUART
ILR2 = 0xfd;
// IRQ8: LIN-UART (transmission)
// IRQ9: 8/16-bit PPG ch1 (lower) | UART/SIO ch1
// IRQ10: 8/16-bit PPG ch1 (upper) | I2C ch1
// IRQ11: 16-bit reload timer ch0
#else
ILR2 = 0xff;
// IRQ8: LIN-UART (transmission)
// IRQ9: 8/16-bit PPG ch1 (lower) | UART/SIO ch1
// IRQ10: 8/16-bit PPG ch1 (upper) | I2C ch1
// IRQ11: 16-bit reload timer ch0
#endif
…
ILR4 = 0xbf;
// IRQ16: 16-bit reload timer ch1 | I2C ch0
// IRQ17: 16-bit PPG ch1
// IRQ18: 10-biat A/D-converter
// IRQ19: Timebase timer
..
}
…
#ifdef enableUART
__interrupt void UART_T (void);
#endif
MCU-AN- 500084-E-10 – Page 19
Capacitance Touch Sensor V1.0
Chapter 4 LIB Usage Notice
__interrupt void TBT (void);
..
#ifdef enableUART
#pragma intvect UART_T 8 // IRQ8: LIN-UART (transmission)
#else
#pragma intvect DefaultIRQHandler 8 // IRQ8: LIN-UART (transmission)
#endif…
#pragma intvect TBT
19
// IRQ19: Timebase timer
…
„ Mode
When slippage mode is selected, the check data will be cleared during checking. Use
“clear_check_data” function to clear check data.
„ Button number
The corresponding relationship between button number and pins are as follows.
Button1-P00, Button2-P01, Button3-P02, Button4-P05,
„ Sample code
For more operation please refer to Appendix: Sample Code.
MCU-AN- 500084-E-10 – Page 20
Capacitance Touch Sensor V1.0
Chapter 5 TSC GUI
5 TSC GUI
This chapter introduces how to use TSC library.
5.1
Overview
The hardware needs to use Serial Port to connect PC with TSC board, as follows:
PC
Serial port
TSC board
Figure 5-1: GUI Connects TSC Board
TSC GUI is used to get and test threshold. It includes four files, as shown in Figure 5-2.
Figure 5-2: GUI Software
MCU-AN- 500084-E-10 – Page 21
Capacitance Touch Sensor V1.0
Chapter 5 TSC GUI
5.2
Open Software
Double click TSC GUI.exe to open the software, and the software includes 4 parts, Menu
Bar, Check module, Test module and Graph module, as following:
Menu Bar: this module ‘FileÆexit’, ‘ToolsÆlanguage’, ‘HelpÆhelp’; ‘HelpÆabout’.
Check: this module includes ‘Button Select’, ‘Mode’, ‘Max/Min Data’, ‘Check Status’,
‘Current Data’ and ‘Start’ Button.
Test: this module includes ‘Mode’, ‘Threshold’, ‘Test Result’, ‘Test Status’, ‘Current Data’,
and ‘Start’ Button.
Graph: this module includes ‘Button Select’ and graph display area.
The main interface is shown as follow:
Figure 5-3: TSC GUI Interface
MCU-AN- 500084-E-10 – Page 22
Capacitance Touch Sensor V1.0
Chapter 5 TSC GUI
5.3
Check Threshold
5.3.1 Overview
1. Button Select: This item is used to select which button to check. It has 16 options:
“button 1” to “button 16”.
2. Mode: This item is used to set current check mode, it include 2 modes, “Not Touch”,
“Touching”.
3. Current Data: This item displays current data.
4. Check Status: This item displays current status, “checking” or “stop”.
5. Max/Min Data: This item displays max data and min data when check is stopped.
6. Get Threshold: Get the threshold.
7. Start/Stop: Clicking this item can start or stop check.
1
○
3
○
2
○
5
○
6
○
4
○
7
○
Figure 5-4: Check Main Interface
MCU-AN- 500084-E-10 – Page 23
Capacitance Touch Sensor V1.0
Chapter 5 TSC GUI
5.3.2 Check Start
Select the button to be checked from Button Select field and select the right mode from
Mode field. Click Start, and the button text changes to Stop. The button will be checked for
a moment.
1
○
2
○
7
○
Figure 5-5: Check Start
MCU-AN- 500084-E-10 – Page 24
Capacitance Touch Sensor V1.0
Chapter 5 TSC GUI
5.3.3 Checking
In this status, all the fields in GUI Check Module cannot be operated except ‘Stop’. If
Touching is selected in Mode, the sensor should be kept in touching state.
Figure 5-6: Checking
MCU-AN- 500084-E-10 – Page 25
Capacitance Touch Sensor V1.0
Chapter 5 TSC GUI
5.3.4 Check Stop
Click Stop button to stop check, and the button text changes to Start. The max data and min
data are generated in Max/Min Data field.
Figure 5-7: Check Stop
MCU-AN- 500084-E-10 – Page 26
Capacitance Touch Sensor V1.0
Chapter 5 TSC GUI
5.3.5 Calculate Threshold
When Not Touch and Touching statuses are all checked, click Get Threshold button to
calculate the threshold.
6
○
Figure 5-8: Calculate Threshold
MCU-AN- 500084-E-10 – Page 27
Capacitance Touch Sensor V1.0
Chapter 5 TSC GUI
5.4
Test Threshold
5.4.1 Overview
1. Mode: This item is used to set current test mode, it include 3 modes, “Not Touch”,
“Touching”.
2. Test Status: This item displays current status, “checking” or “stop”.
3. Threshold: This item sets the threshold to be tested.
4. Current Data: This item displays current data.
5. Test Result: This item displays test result, “pass” and “not pass”.
6. More Information: Display more information on test.
7. Start/Stop: Clicking this item can start or stop test.
1
○
4
○
3
○
5
○
6
○
2
○
7
○
Figure 5-9: Test Main Interface
MCU-AN- 500084-E-10 – Page 28
Capacitance Touch Sensor V1.0
Chapter 5 TSC GUI
5.4.2 Test Start
Select a mode from Mode field, select the button to be tested in Current Data field, and
input the threshold in Threshold field. If the threshold is already gotten in check module, it
will be automatically displayed in Threshold field. Click OK to submit the threshold.
1
○
4
○
3
○
7
○
Figure 5-10: Test Start
MCU-AN- 500084-E-10 – Page 29
Capacitance Touch Sensor V1.0
Chapter 5 TSC GUI
5.4.3 Testing
Figure 5-11: Testing
MCU-AN- 500084-E-10 – Page 30
Capacitance Touch Sensor V1.0
Chapter 5 TSC GUI
5.4.4 Test Stop
Click Stop to stop test, and the current button test result will be displayed in Test Result.
Click More Information to display all button test results.
6
○
Figure 5-12: Test Result
MCU-AN- 500084-E-10 – Page 31
Capacitance Touch Sensor V1.0
Chapter 5 TSC GUI
5.5
Graph
5.5.1 Overview
1. Button Select: This item is used to select which button to display. It has 16 items, “button
1” to “button 16”.
5.5.2 Graph
This module displays A/D sampling data graph. Select the button to be displayed from
Button Select field.
Figure 5-13: Graph
MCU-AN- 500084-E-10 – Page 32
Capacitance Touch Sensor V1.0
Chapter 6 Additional Information
6 Additional Information
For more information about FUJITSU SEMICONDUCTOR products, visit the following
website.
English version:
http://www.fujitsu.com/cn/fsp/services/mcu/mb95/application_notes.html
Simplified Chinese Version:
http://www.fujitsu.com/cn/fss/services/mcu/mb95/application_notes.html
MCU-AN- 500084-E-10 – Page 33
Capacitance Touch Sensor V1.0
Chapter 7 Appendix
7 Appendix
7.1
Index of Figures
Figure 2-1: Capacitance Touch Sensor Theory ....................................................................... 6 Figure 2-2: Operation Flowchart .............................................................................................. 6 Figure 2-3: Hardware Connection ............................................................................................ 7 Figure 2-4: Sketch Map ............................................................................................................ 7 Figure 3-1: Select File ............................................................................................................ 13 Figure 3-2: open Add Member Window ................................................................................. 14 Figure 3-3: Select File Type ................................................................................................... 14 Figure 3-4: Show TSC.lib ....................................................................................................... 15 Figure 3-5: Add TSC.lib ......................................................................................................... 15 Figure 3-6: Add “#include “TSC.h "” in “main.c” ..................................................................... 16 Figure 3-7: ‘#include ‘TSC.h’’ is Added Successfully ............................................................. 16 Figure 3-8: Get Threshold with GUI Flowchart ...................................................................... 17 Figure 3-9: Working Flowchart ............................................................................................... 18 Figure 5-1: GUI Connects TSC Board ................................................................................... 21 Figure 5-2: GUI Software ....................................................................................................... 21 Figure 5-3: TSC GUI Interface ............................................................................................... 22 Figure 5-4: Check Main Interface ........................................................................................... 23 Figure 5-5: Check Start .......................................................................................................... 24 Figure 5-6: Checking .............................................................................................................. 25 Figure 5-7: Check Stop .......................................................................................................... 26 Figure 5-8: Calculate Threshold ............................................................................................. 27 Figure 5-9: Test Main Interface .............................................................................................. 28 Figure 5-10: Test Start ........................................................................................................... 29 Figure 5-11: Testing ............................................................................................................... 30 Figure 5-12: Test Result ........................................................................................................ 31 Figure 5-13: Graph ................................................................................................................. 32 7.2
Index of Table
Table 3-1: Functions ................................................................................................................ 8 Table 3-2: TSC_init .................................................................................................................. 9 Table 3-3: button1_init ............................................................................................................. 9 Table 3-4: button2_init ............................................................................................................. 9 Table 3-5: button3_init ............................................................................................................. 9 Table 3-6: button4_init ............................................................................................................. 9 Table 3-7: UART_init ............................................................................................................. 10 MCU-AN- 500084-E-10 – Page 34
Capacitance Touch Sensor V1.0
Chapter 7 Appendix
Table 3-8: TBT_init ................................................................................................................ 10 Table 3-9: Transmit ................................................................................................................ 10 Table 3-10: get_mode ............................................................................................................ 10 Table 3-11: Get_Data ............................................................................................................ 11 Table 3-12: set_mode ............................................................................................................ 11 Table 3-13: clear_check_data ................................................................................................ 12 Table 3-14: Performance ....................................................................................................... 12 MCU-AN- 500084-E-10 – Page 35
Capacitance Touch Sensor V1.0
Chapter 7 Appendix
7.3
Sample Code
Project Name: TSC
Function: TSC
/********************************************************************************************
-File:
main.c
-Author:
Ivan Xiao
-Date:
20100408
-Function: For TSC
*********************************************************************************************/
#include "mb95200.h"
#include "TSC.h"
unsigned char led = 0;
/********************************************************************************************
-FunctionName: init
-Description: initialization system and
-Input:
None
-Return:
None
*********************************************************************************************/
void init (void)
{
SYCC = 0;
EIC30 = 0x50;
//machine frequence is 8M
//external interrupt 7
DDR1 = 0xff;
PDR1 = 0xFF;
DDR6 = 0xff;
PDR6 = 0xFF;
Button1_init(1077);
//button1 threshold initialization
Button2_init(1080);
//button2 threshold initialization
Button3_init(1086);
//button3 threshold initialization
Button4_init(1080);
//button4 threshold initialization
TSC_init ();
//TSC initialization
#ifdef enableUART
UART_init();
//use serial port and initialization
#endif
TBT_init();
//Timebase Timer initialization
}
MCU-AN- 500084-E-10 – Page 36
Capacitance Touch Sensor V1.0
Chapter 7 Appendix
/********************************************************************************************
-FunctionName: main
-Description: main function
-Input:
None
-Return:
None
*********************************************************************************************/
void main(void)
{
unsigned char temp;
init ();
InitIrqLevels();
__EI();
while(1)
{
if(get_mode() == Highest_Mode)
//judge current mode
{
switch(Get_Data())
//get check result
{
case HighestMode_Button1:
PDR6 = 0xf7; //button1 touching
temp = PDR0;
temp |= 0x40;
PDR0 = temp;
PDR1 = 0xff;
break;
case HighestMode_Button2:
PDR6 = 0xef; //button2 touching
temp = PDR0;
temp |= 0x40;
PDR0 = temp;
PDR1 = 0xff;
break;
MCU-AN- 500084-E-10 – Page 37
Capacitance Touch Sensor V1.0
Chapter 7 Appendix
case HighestMode_Button3:
PDR6 = 0xff; //button3 touching
temp = PDR0;
temp &= 0xbf;
PDR0 = temp;
PDR1 = 0xff;
break;
case HighestMode_Button4:
PDR6 = 0xff; //button4 touching
temp = PDR0;
temp |= 0x40;
PDR0 = temp;
PDR1 = 0x00;
break;
case Checking:
PDR6 = 0xff; //no button touch
temp = PDR0;
temp |= 0x40;
PDR0 = temp;
PDR1 = 0xFF;break;
}
}
else
if(get_mode() ==Normal_Mode)
//judge current mode
{
if((Get_Data() & BIT00_Button1)== NormalMode_Button1)
//judge button1 touching?
{
temp = PDR6;
temp &= 0xf7;
PDR6 = temp;
}
else
{
temp = PDR6;
temp |= 0x08;
MCU-AN- 500084-E-10 – Page 38
Capacitance Touch Sensor V1.0
Chapter 7 Appendix
PDR6 = temp;
}
if((Get_Data() & BIT01_Button2) == NormalMode_Button2)
//judge button1 touching?
{
temp = PDR6;
temp &= 0xef;
PDR6 = temp;
}
else
{
temp = PDR6;
temp |= 0x10;
PDR6 = temp;
}
if((Get_Data() & BIT02_Button3) == NormalMode_Button3)
//judge button1 touching?
{
temp = PDR0;
temp &= 0xbf;
PDR0 = temp;
}
else
{
temp = PDR0;
temp |= 0x40;
PDR0 = temp;
}
if((Get_Data() & BIT03_Button4) == NormalMode_Button4)
//judge button1 touching?
{
PDR1 = 0x00;
}
else
{
PDR1 = 0xff;
}
}
MCU-AN- 500084-E-10 – Page 39
Capacitance Touch Sensor V1.0
Chapter 7 Appendix
else
if(get_mode() == Slippage_Mode)
//judge current mode
{
if(Get_Data() == SlippageMode_Add)
//judge slippage bearing
{
led++;
if(led>4)
led =4;
clear_check_data();
//clear check data
}
else
if(Get_Data() == SlippageMode_Sub)
//judge slippage bearing
{
if(led !=0)
led--;
clear_check_data();
}
switch(led)
{
case 0:
//open 0 led
temp = PDR6;
temp |= 0x18;
PDR6 = temp;
temp = PDR0;
temp |= 0x40;
PDR0 = temp;
PDR1 = 0xff;
break;
case 1:
//open 1 led
temp = PDR6;
temp |= 0x10;
temp &= 0xF7;
PDR6 = temp;
temp = PDR0;
temp |= 0x40;
MCU-AN- 500084-E-10 – Page 40
Capacitance Touch Sensor V1.0
Chapter 7 Appendix
PDR0 = temp;
PDR1 = 0xff;
break;
case 2:
//open 2 leds
temp = PDR6;
temp &= 0xE7;
PDR6 = temp;
temp = PDR0;
temp |= 0x40;
PDR0 = temp;
PDR1 = 0xff;
break;
case 3:
//open 3 leds
temp = PDR6;
temp &= 0xE7;
PDR6 = temp;
temp = PDR0;
temp &= 0xBF;
PDR0 = temp;
PDR1 = 0xff;
break;
case 4:
//open 4 leds
temp = PDR6;
temp &= 0xE7;
PDR6 = temp;
temp = PDR0;
temp &= 0xBF;
PDR0 = temp;
PDR1 = 0x00;
break;
}
}
}
}
MCU-AN- 500084-E-10 – Page 41
Capacitance Touch Sensor V1.0
Chapter 7 Appendix
/********************************************************************************************
-FunctionName: E_INT
-Description: external interrupt process, change mode by hard key.
-Input:
None
-Return:
None
*********************************************************************************************/
__interrupt void E_INT (void)
{
unsigned char temp;
if(get_mode() == Highest_Mode)
//judge current mode to change mode
set_mode(Normal_Mode);
else
if(get_mode() == Normal_Mode)
{
set_mode(Slippage_Mode);
}
else
if(get_mode() == Slippage_Mode)
set_mode(Highest_Mode);
temp = EIC30;
temp &= 0x7f;
EIC30 = temp;
}
/********************************************************************************************
-FunctionName: UART_T
-Description: serial port transmit interrupt
-Input:
None
-Return:
None
*********************************************************************************************/
#ifdef enableUART
__interrupt void UART_T (void)
{
Transmit();
//transmit check data to TSC GUI
}
#endif
MCU-AN- 500084-E-10 – Page 42
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