Engravity-CDU / CDU_Mbed_21

voor willem test

Dependencies:   4DGL MODSERIAL mbed mbos

keyboard2.cpp@7:6576a287e563, 2014-07-17 (annotated)

Committer:
LvdK
Date:
Thu Jul 17 10:09:14 2014 +0000
Revision:
7:6576a287e563
CDU V21

Who changed what in which revision?

UserRevisionLine numberNew contents of line
LvdK 7:6576a287e563 1 /* File: keyboard2.cpp W. Braat */
LvdK 7:6576a287e563 2 /* Keyboard chip TCA8418 control */
LvdK 7:6576a287e563 3
LvdK 7:6576a287e563 4 #include "mbed.h"
LvdK 7:6576a287e563 5 #include "MODSERIAL.h"
LvdK 7:6576a287e563 6 #include "keyboard.h"
LvdK 7:6576a287e563 7 #include "mbos.h"
LvdK 7:6576a287e563 8 #include "mbos_def.h"
LvdK 7:6576a287e563 9
LvdK 7:6576a287e563 10 const int CDU_KB_ADRS = 0x68; //Base address TCA8418 keypad scanner
LvdK 7:6576a287e563 11 const int I2C_ACK = 0x00;
LvdK 7:6576a287e563 12 //const int NACK = 0x01;
LvdK 7:6576a287e563 13
LvdK 7:6576a287e563 14 extern int key_hit_ID;
LvdK 7:6576a287e563 15 extern mbos CDU_OS;
LvdK 7:6576a287e563 16 extern MODSERIAL SERIAL_DEBUG;
LvdK 7:6576a287e563 17
LvdK 7:6576a287e563 18 //CDU Keyboard communications KEYBOARD_INT
LvdK 7:6576a287e563 19 InterruptIn CDU_KB_INT( p5 ); //Set CDU keyboard interrupt line
LvdK 7:6576a287e563 20 I2C CDU_I2C(p28, p27); //I2C bus for keyboard/temp chip.
LvdK 7:6576a287e563 21
LvdK 7:6576a287e563 22 //CDU Keyboard LEDS
LvdK 7:6576a287e563 23 DigitalOut EXEC( p12 );
LvdK 7:6576a287e563 24 DigitalOut FAIL( p17 );
LvdK 7:6576a287e563 25 DigitalOut DSPY( p18 );
LvdK 7:6576a287e563 26 DigitalOut MSG( p19 );
LvdK 7:6576a287e563 27 DigitalOut OFST( p20 );
LvdK 7:6576a287e563 28
LvdK 7:6576a287e563 29 //CDU background lighting
LvdK 7:6576a287e563 30 AnalogIn BGL_POT( p16 ); //background light control potmeter
LvdK 7:6576a287e563 31 PwmOut BGL_LED( p21 ); //PWM output background lighting
LvdK 7:6576a287e563 32
LvdK 7:6576a287e563 33 // ---- added by LvdK : -----------------------------------------------------------
LvdK 7:6576a287e563 34 DigitalOut Key_led(LED2); // : LED 2 on Mbed board toggles when CDU key is pressed
LvdK 7:6576a287e563 35 // --------------------------------------------------------------------------------
LvdK 7:6576a287e563 36
LvdK 7:6576a287e563 37 void CDU_KB_COMM_INIT()
LvdK 7:6576a287e563 38 { //initialize communication with TCA84818
LvdK 7:6576a287e563 39 char cmd[2];
LvdK 7:6576a287e563 40
LvdK 7:6576a287e563 41 cmd[0] = REG_CFG; //pointer byte to CFG register
LvdK 7:6576a287e563 42 cmd[1] = 0x01; //data for CFG register KE_IEN set to 1
LvdK 7:6576a287e563 43 if ( CDU_I2C.write(CDU_KB_ADRS,cmd, 2) == I2C_ACK ) //initiate write cycle and check for ACK
LvdK 7:6576a287e563 44 {
LvdK 7:6576a287e563 45 //intialize all registers from TCA8418 here
LvdK 7:6576a287e563 46 cmd[0] = REG_INT_STAT; //pointer byte to Interrupt Status Register
LvdK 7:6576a287e563 47 cmd[1] = 0x01; //Reset KE-INT flag
LvdK 7:6576a287e563 48 CDU_I2C.write(CDU_KB_ADRS,cmd, 2 ); //Write to Interrupt Status Register from TCA4818
LvdK 7:6576a287e563 49
LvdK 7:6576a287e563 50 //Set TCA8418 to Keypad mode
LvdK 7:6576a287e563 51 cmd[0]=REG_KP_GPIO1; //KP_GIO1
LvdK 7:6576a287e563 52 cmd[1]=0xFF; //Set to Keypad mode
LvdK 7:6576a287e563 53 CDU_I2C.write(CDU_KB_ADRS,cmd, 2);
LvdK 7:6576a287e563 54
LvdK 7:6576a287e563 55 cmd[0]=REG_KP_GPIO2; //KP_GIO2
LvdK 7:6576a287e563 56 cmd[1]=0xFF; //Set to Keypad mode
LvdK 7:6576a287e563 57 CDU_I2C.write(CDU_KB_ADRS,cmd, 2);
LvdK 7:6576a287e563 58
LvdK 7:6576a287e563 59 cmd[0]=REG_KP_GPIO3; //KP_GIO3
LvdK 7:6576a287e563 60 cmd[1]=0xFF; //Set to Keypad mode
LvdK 7:6576a287e563 61 CDU_I2C.write(CDU_KB_ADRS,cmd, 2);
LvdK 7:6576a287e563 62
LvdK 7:6576a287e563 63 }
LvdK 7:6576a287e563 64 else
LvdK 7:6576a287e563 65 {
LvdK 7:6576a287e563 66 //No response from TCA8418 keyboard chip
LvdK 7:6576a287e563 67 FAIL = 1; //Switch on FAIL indicator
LvdK 7:6576a287e563 68 }
LvdK 7:6576a287e563 69 }
LvdK 7:6576a287e563 70
LvdK 7:6576a287e563 71 void CDU_KB_GET_KEY()
LvdK 7:6576a287e563 72 {
LvdK 7:6576a287e563 73
LvdK 7:6576a287e563 74 Key_led = !Key_led; // : toggle LED 2
LvdK 7:6576a287e563 75
LvdK 7:6576a287e563 76 char cmd[2];
LvdK 7:6576a287e563 77 //Read interrupt status flag
LvdK 7:6576a287e563 78 cmd[0] = REG_INT_STAT; //pointer byte to Interrupt Status Register
LvdK 7:6576a287e563 79 CDU_I2C.write(CDU_KB_ADRS, cmd, 1); //initiate read cycle
LvdK 7:6576a287e563 80 CDU_I2C.read(CDU_KB_ADRS, cmd, 1); //read key value
LvdK 7:6576a287e563 81
LvdK 7:6576a287e563 82 //Read Key Lock and Event Counter
LvdK 7:6576a287e563 83 cmd[0] = REG_KEY_LCK_EC; //pointer byte KEY_LCK_EC
LvdK 7:6576a287e563 84 CDU_I2C.write(CDU_KB_ADRS, cmd, 1); //initiate read cycle
LvdK 7:6576a287e563 85 CDU_I2C.read(CDU_KB_ADRS, cmd, 1); //read key value
LvdK 7:6576a287e563 86
LvdK 7:6576a287e563 87 //Keypress --> read data from keybuffer
LvdK 7:6576a287e563 88 cmd[0] = REG_KEY_EVENT_A; //pointer to Key Event Register KEY_EVENT_A
LvdK 7:6576a287e563 89 CDU_I2C.write(CDU_KB_ADRS, cmd, 1); //initiate read cycle
LvdK 7:6576a287e563 90 CDU_I2C.read(CDU_KB_ADRS, cmd, 2); //read key value (=2 words)
LvdK 7:6576a287e563 91
LvdK 7:6576a287e563 92 key_hit_ID = int(cmd[0]);
LvdK 7:6576a287e563 93 SERIAL_DEBUG.printf("keynumber : %d,%d\r\n",key_hit_ID,cmd[1] ); // : TEST only !
LvdK 7:6576a287e563 94
LvdK 7:6576a287e563 95 //Reset interrupt flag
LvdK 7:6576a287e563 96 cmd[0] = REG_INT_STAT; //pointer byte to Interrupt Status Register
LvdK 7:6576a287e563 97 cmd[1] = 0x01; //Reset KE-INT flag
LvdK 7:6576a287e563 98 CDU_I2C.write(CDU_KB_ADRS,cmd, 2);
LvdK 7:6576a287e563 99
LvdK 7:6576a287e563 100 //Read interrupt status flag
LvdK 7:6576a287e563 101 cmd[0] = 0x02; //pointer byte to Interrupt Status Register
LvdK 7:6576a287e563 102 CDU_I2C.write(CDU_KB_ADRS, cmd, 1); //initiate read cycle
LvdK 7:6576a287e563 103 CDU_I2C.read(CDU_KB_ADRS, cmd, 1); //read interrupt value
LvdK 7:6576a287e563 104
LvdK 7:6576a287e563 105 if ( cmd[0] == 1 )
LvdK 7:6576a287e563 106 { //reset INT flag failed!
LvdK 7:6576a287e563 107 while (1)
LvdK 7:6576a287e563 108 {
LvdK 7:6576a287e563 109 cmd[0] = 0x04; //pointer to Key Event Register KEY_EVENT_A
LvdK 7:6576a287e563 110 CDU_I2C.write(CDU_KB_ADRS, cmd, 1); //initiate read cycle
LvdK 7:6576a287e563 111 CDU_I2C.read(CDU_KB_ADRS, cmd, 2); //read key value (=2 words)
LvdK 7:6576a287e563 112
LvdK 7:6576a287e563 113 //Reset interrupt flag
LvdK 7:6576a287e563 114 cmd[0] = 0x02; //pointer byte to Interrupt Status Register
LvdK 7:6576a287e563 115 cmd[1] = 0x01; //Reset KE-INT flag
LvdK 7:6576a287e563 116 CDU_I2C.write(CDU_KB_ADRS,cmd, 2 );
LvdK 7:6576a287e563 117
LvdK 7:6576a287e563 118 //Read interrupt status flag
LvdK 7:6576a287e563 119 cmd[0] = 0x02; //pointer byte to Interrupt Status Register
LvdK 7:6576a287e563 120 CDU_I2C.write(CDU_KB_ADRS, cmd, 1); //initiate read cycle
LvdK 7:6576a287e563 121 CDU_I2C.read(CDU_KB_ADRS, cmd, 1); //read interrupt value
LvdK 7:6576a287e563 122
LvdK 7:6576a287e563 123 if ( cmd[0] == 0 ) break;
LvdK 7:6576a287e563 124 }
LvdK 7:6576a287e563 125 }
LvdK 7:6576a287e563 126 }
LvdK 7:6576a287e563 127
LvdK 7:6576a287e563 128 void SET_KEY_EVENT()
LvdK 7:6576a287e563 129 {
LvdK 7:6576a287e563 130 // set KEY_EVENT to wakeup SEND_KEYMESSAGE_TASK :
LvdK 7:6576a287e563 131 CDU_OS.SetEvent(KEY_EVENT,SEND_KEYMESSAGE_TASK_ID );
LvdK 7:6576a287e563 132 }
LvdK 7:6576a287e563 133
LvdK 7:6576a287e563 134 void CDU_KB_INT_START()
LvdK 7:6576a287e563 135 {
LvdK 7:6576a287e563 136 CDU_KB_INT.mode( PullUp ); //Keyboard chip pulls this line to 0 on a keypress
LvdK 7:6576a287e563 137 CDU_KB_INT.fall(&SET_KEY_EVENT); //Bind function to handle interrupt
LvdK 7:6576a287e563 138 }
LvdK 7:6576a287e563 139
LvdK 7:6576a287e563 140 void CDU_SET_BGL_INTENSITY( int nVal=255 )
LvdK 7:6576a287e563 141 {
LvdK 7:6576a287e563 142 //This routine must be called 5-10x per second. Manual test to see what is pleasant to see
LvdK 7:6576a287e563 143 //AnalogIn BGL_POT( p15 ); //background light control potmeter. Returns a value between 0.0 and 1.0
LvdK 7:6576a287e563 144 //PwmOut BGL_LED( p21 ); //PWM output
LvdK 7:6576a287e563 145 //calculate required brightness in percentage from 0%-100%
LvdK 7:6576a287e563 146 //nVal 255 --> calculate brightness from potmeter value (default value if no parameter is passed)
LvdK 7:6576a287e563 147 //nVal = 0 --> switch off backlight
LvdK 7:6576a287e563 148 //nVal = 100 --> switch on backlight max
LvdK 7:6576a287e563 149
LvdK 7:6576a287e563 150 switch (nVal)
LvdK 7:6576a287e563 151 {
LvdK 7:6576a287e563 152 case 0:
LvdK 7:6576a287e563 153 {
LvdK 7:6576a287e563 154 //switch off backlighting
LvdK 7:6576a287e563 155 BGL_LED.pulsewidth( 0.0 );
LvdK 7:6576a287e563 156 break;
LvdK 7:6576a287e563 157 }
LvdK 7:6576a287e563 158 case 100:
LvdK 7:6576a287e563 159 {
LvdK 7:6576a287e563 160 //switch on backlighting
LvdK 7:6576a287e563 161 BGL_LED.pulsewidth( 100.0 );
LvdK 7:6576a287e563 162 break;
LvdK 7:6576a287e563 163 }
LvdK 7:6576a287e563 164 case 255:
LvdK 7:6576a287e563 165 {
LvdK 7:6576a287e563 166 //calculate percentage from potmeter value
LvdK 7:6576a287e563 167 if ( BGL_POT < 0.01 )
LvdK 7:6576a287e563 168 {
LvdK 7:6576a287e563 169 BGL_LED = 0.0; //prevents flickering when low intensity
LvdK 7:6576a287e563 170 }
LvdK 7:6576a287e563 171 else
LvdK 7:6576a287e563 172 {
LvdK 7:6576a287e563 173 BGL_LED = BGL_POT;
LvdK 7:6576a287e563 174 }
LvdK 7:6576a287e563 175 }
LvdK 7:6576a287e563 176 }
LvdK 7:6576a287e563 177 }