Engravity-CDU / CDU_Mbed_36

New work version with additional functions

Dependencies:   4DGL-UC ConfigFile MODSERIAL mbed mbos

Fork of CDU_Mbed_35 by Engravity-CDU

keyboard2.cpp@17:b3545e9d38f7, 2014-08-26 (annotated)

Committer:
WillemBraat
Date:
Tue Aug 26 14:18:39 2014 +0000
Revision:
17:b3545e9d38f7
Parent:
13:d60c746c097c
Child:
20:2d6ac4577e68
All pin-definitions are driven by pins.h

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 8:422544d24df3 8 #include "mbos_def2.h"
WillemBraat 17:b3545e9d38f7 9 #include "pins.h"
LvdK 7:6576a287e563 10
LvdK 7:6576a287e563 11 const int CDU_KB_ADRS = 0x68; //Base address TCA8418 keypad scanner
LvdK 7:6576a287e563 12 const int I2C_ACK = 0x00;
LvdK 7:6576a287e563 13 //const int NACK = 0x01;
LvdK 7:6576a287e563 14
LvdK 7:6576a287e563 15 extern int key_hit_ID;
LvdK 7:6576a287e563 16 extern mbos CDU_OS;
LvdK 7:6576a287e563 17 extern MODSERIAL SERIAL_DEBUG;
LvdK 7:6576a287e563 18
LvdK 7:6576a287e563 19 //CDU Keyboard communications KEYBOARD_INT
WillemBraat 17:b3545e9d38f7 20 InterruptIn CDU_KB_INT( KBD_INT ); //Set CDU keyboard interrupt line
WillemBraat 17:b3545e9d38f7 21 I2C CDU_I2C(I2C_SDA, I2C_SCL); //I2C bus for keyboard/temp chip.
LvdK 7:6576a287e563 22
LvdK 7:6576a287e563 23 //CDU Keyboard LEDS
WillemBraat 17:b3545e9d38f7 24 DigitalOut EXEC( LED_EXEC );
WillemBraat 17:b3545e9d38f7 25 DigitalOut FAIL( LED_FAIL );
WillemBraat 17:b3545e9d38f7 26 DigitalOut DSPY( LED_DSPY );
WillemBraat 17:b3545e9d38f7 27 DigitalOut MSG( LED_MSG );
WillemBraat 17:b3545e9d38f7 28 DigitalOut OFST( LED_OFST );
LvdK 7:6576a287e563 29
LvdK 7:6576a287e563 30 //CDU background lighting
WillemBraat 17:b3545e9d38f7 31 AnalogIn BGL_POT( BACKLIGHT_SET ); //background light control potmeter
WillemBraat 17:b3545e9d38f7 32 PwmOut BGL_LED( BACKLIGHT_DRIVE ); //PWM output background lighting
LvdK 7:6576a287e563 33
LvdK 7:6576a287e563 34 // ---- added by LvdK : -----------------------------------------------------------
WillemBraat 17:b3545e9d38f7 35 DigitalOut Key_led( KEY_PRESSED ); // : LED 2 on Mbed board toggles when CDU key is pressed
LvdK 7:6576a287e563 36 // --------------------------------------------------------------------------------
LvdK 7:6576a287e563 37
LvdK 7:6576a287e563 38 void CDU_KB_COMM_INIT()
LvdK 7:6576a287e563 39 { //initialize communication with TCA84818
LvdK 7:6576a287e563 40 char cmd[2];
WillemBraat 13:d60c746c097c 41 Key_led = 0;
LvdK 7:6576a287e563 42 cmd[0] = REG_CFG; //pointer byte to CFG register
LvdK 7:6576a287e563 43 cmd[1] = 0x01; //data for CFG register KE_IEN set to 1
LvdK 7:6576a287e563 44 if ( CDU_I2C.write(CDU_KB_ADRS,cmd, 2) == I2C_ACK ) //initiate write cycle and check for ACK
LvdK 7:6576a287e563 45 {
LvdK 7:6576a287e563 46 //intialize all registers from TCA8418 here
LvdK 7:6576a287e563 47 cmd[0] = REG_INT_STAT; //pointer byte to Interrupt Status Register
LvdK 7:6576a287e563 48 cmd[1] = 0x01; //Reset KE-INT flag
LvdK 7:6576a287e563 49 CDU_I2C.write(CDU_KB_ADRS,cmd, 2 ); //Write to Interrupt Status Register from TCA4818
LvdK 7:6576a287e563 50
LvdK 7:6576a287e563 51 //Set TCA8418 to Keypad mode
LvdK 7:6576a287e563 52 cmd[0]=REG_KP_GPIO1; //KP_GIO1
LvdK 7:6576a287e563 53 cmd[1]=0xFF; //Set to Keypad mode
LvdK 7:6576a287e563 54 CDU_I2C.write(CDU_KB_ADRS,cmd, 2);
LvdK 7:6576a287e563 55
LvdK 7:6576a287e563 56 cmd[0]=REG_KP_GPIO2; //KP_GIO2
LvdK 7:6576a287e563 57 cmd[1]=0xFF; //Set to Keypad mode
LvdK 7:6576a287e563 58 CDU_I2C.write(CDU_KB_ADRS,cmd, 2);
LvdK 7:6576a287e563 59
LvdK 7:6576a287e563 60 cmd[0]=REG_KP_GPIO3; //KP_GIO3
LvdK 7:6576a287e563 61 cmd[1]=0xFF; //Set to Keypad mode
LvdK 7:6576a287e563 62 CDU_I2C.write(CDU_KB_ADRS,cmd, 2);
LvdK 7:6576a287e563 63
LvdK 7:6576a287e563 64 }
LvdK 7:6576a287e563 65 else
LvdK 7:6576a287e563 66 {
LvdK 7:6576a287e563 67 //No response from TCA8418 keyboard chip
LvdK 7:6576a287e563 68 FAIL = 1; //Switch on FAIL indicator
LvdK 7:6576a287e563 69 }
LvdK 7:6576a287e563 70 }
LvdK 7:6576a287e563 71
LvdK 7:6576a287e563 72 void CDU_KB_GET_KEY()
LvdK 7:6576a287e563 73 {
LvdK 7:6576a287e563 74
LvdK 7:6576a287e563 75 Key_led = !Key_led; // : toggle LED 2
LvdK 7:6576a287e563 76
LvdK 7:6576a287e563 77 char cmd[2];
LvdK 7:6576a287e563 78 //Read interrupt status flag
LvdK 7:6576a287e563 79 cmd[0] = REG_INT_STAT; //pointer byte to Interrupt Status Register
LvdK 7:6576a287e563 80 CDU_I2C.write(CDU_KB_ADRS, cmd, 1); //initiate read cycle
LvdK 7:6576a287e563 81 CDU_I2C.read(CDU_KB_ADRS, cmd, 1); //read key value
LvdK 7:6576a287e563 82
LvdK 7:6576a287e563 83 //Read Key Lock and Event Counter
LvdK 7:6576a287e563 84 cmd[0] = REG_KEY_LCK_EC; //pointer byte KEY_LCK_EC
LvdK 7:6576a287e563 85 CDU_I2C.write(CDU_KB_ADRS, cmd, 1); //initiate read cycle
LvdK 7:6576a287e563 86 CDU_I2C.read(CDU_KB_ADRS, cmd, 1); //read key value
LvdK 7:6576a287e563 87
LvdK 7:6576a287e563 88 //Keypress --> read data from keybuffer
LvdK 7:6576a287e563 89 cmd[0] = REG_KEY_EVENT_A; //pointer to Key Event Register KEY_EVENT_A
LvdK 7:6576a287e563 90 CDU_I2C.write(CDU_KB_ADRS, cmd, 1); //initiate read cycle
LvdK 7:6576a287e563 91 CDU_I2C.read(CDU_KB_ADRS, cmd, 2); //read key value (=2 words)
LvdK 7:6576a287e563 92
LvdK 7:6576a287e563 93 key_hit_ID = int(cmd[0]);
LvdK 8:422544d24df3 94
LvdK 8:422544d24df3 95 //SERIAL_DEBUG.printf("keynumber : %d,%d\r\n",key_hit_ID,cmd[1] ); // : TEST only !
LvdK 7:6576a287e563 96
LvdK 7:6576a287e563 97 //Reset interrupt flag
LvdK 7:6576a287e563 98 cmd[0] = REG_INT_STAT; //pointer byte to Interrupt Status Register
LvdK 7:6576a287e563 99 cmd[1] = 0x01; //Reset KE-INT flag
LvdK 7:6576a287e563 100 CDU_I2C.write(CDU_KB_ADRS,cmd, 2);
LvdK 7:6576a287e563 101
LvdK 7:6576a287e563 102 //Read interrupt status flag
LvdK 7:6576a287e563 103 cmd[0] = 0x02; //pointer byte to Interrupt Status Register
LvdK 7:6576a287e563 104 CDU_I2C.write(CDU_KB_ADRS, cmd, 1); //initiate read cycle
LvdK 7:6576a287e563 105 CDU_I2C.read(CDU_KB_ADRS, cmd, 1); //read interrupt value
LvdK 7:6576a287e563 106
LvdK 7:6576a287e563 107 if ( cmd[0] == 1 )
LvdK 7:6576a287e563 108 { //reset INT flag failed!
LvdK 7:6576a287e563 109 while (1)
LvdK 7:6576a287e563 110 {
LvdK 7:6576a287e563 111 cmd[0] = 0x04; //pointer to Key Event Register KEY_EVENT_A
LvdK 7:6576a287e563 112 CDU_I2C.write(CDU_KB_ADRS, cmd, 1); //initiate read cycle
LvdK 7:6576a287e563 113 CDU_I2C.read(CDU_KB_ADRS, cmd, 2); //read key value (=2 words)
LvdK 7:6576a287e563 114
LvdK 7:6576a287e563 115 //Reset interrupt flag
LvdK 7:6576a287e563 116 cmd[0] = 0x02; //pointer byte to Interrupt Status Register
LvdK 7:6576a287e563 117 cmd[1] = 0x01; //Reset KE-INT flag
LvdK 7:6576a287e563 118 CDU_I2C.write(CDU_KB_ADRS,cmd, 2 );
LvdK 7:6576a287e563 119
LvdK 7:6576a287e563 120 //Read interrupt status flag
LvdK 7:6576a287e563 121 cmd[0] = 0x02; //pointer byte to Interrupt Status Register
LvdK 7:6576a287e563 122 CDU_I2C.write(CDU_KB_ADRS, cmd, 1); //initiate read cycle
LvdK 7:6576a287e563 123 CDU_I2C.read(CDU_KB_ADRS, cmd, 1); //read interrupt value
LvdK 7:6576a287e563 124
LvdK 7:6576a287e563 125 if ( cmd[0] == 0 ) break;
LvdK 7:6576a287e563 126 }
LvdK 7:6576a287e563 127 }
LvdK 7:6576a287e563 128 }
LvdK 7:6576a287e563 129
LvdK 7:6576a287e563 130 void SET_KEY_EVENT()
LvdK 7:6576a287e563 131 {
LvdK 7:6576a287e563 132 // set KEY_EVENT to wakeup SEND_KEYMESSAGE_TASK :
LvdK 7:6576a287e563 133 CDU_OS.SetEvent(KEY_EVENT,SEND_KEYMESSAGE_TASK_ID );
LvdK 7:6576a287e563 134 }
LvdK 7:6576a287e563 135
LvdK 7:6576a287e563 136 void CDU_KB_INT_START()
LvdK 7:6576a287e563 137 {
LvdK 7:6576a287e563 138 CDU_KB_INT.mode( PullUp ); //Keyboard chip pulls this line to 0 on a keypress
LvdK 7:6576a287e563 139 CDU_KB_INT.fall(&SET_KEY_EVENT); //Bind function to handle interrupt
LvdK 7:6576a287e563 140 }
LvdK 7:6576a287e563 141
LvdK 7:6576a287e563 142 void CDU_SET_BGL_INTENSITY( int nVal=255 )
LvdK 7:6576a287e563 143 {
LvdK 7:6576a287e563 144 //This routine must be called 5-10x per second. Manual test to see what is pleasant to see
LvdK 7:6576a287e563 145 //AnalogIn BGL_POT( p15 ); //background light control potmeter. Returns a value between 0.0 and 1.0
LvdK 7:6576a287e563 146 //PwmOut BGL_LED( p21 ); //PWM output
LvdK 7:6576a287e563 147 //calculate required brightness in percentage from 0%-100%
LvdK 7:6576a287e563 148 //nVal 255 --> calculate brightness from potmeter value (default value if no parameter is passed)
LvdK 7:6576a287e563 149 //nVal = 0 --> switch off backlight
LvdK 7:6576a287e563 150 //nVal = 100 --> switch on backlight max
WillemBraat 10:9a5f1b389973 151
WillemBraat 12:7e350a27f936 152 static int LightOn = 1;
WillemBraat 12:7e350a27f936 153 static int FullBright = 0;
WillemBraat 10:9a5f1b389973 154
LvdK 7:6576a287e563 155 switch (nVal)
LvdK 7:6576a287e563 156 {
LvdK 7:6576a287e563 157 case 0:
LvdK 7:6576a287e563 158 {
LvdK 7:6576a287e563 159 //switch off backlighting
WillemBraat 10:9a5f1b389973 160 BGL_LED = 0.0 ;
WillemBraat 10:9a5f1b389973 161 LightOn = 0;
WillemBraat 13:d60c746c097c 162 FullBright = 0;
LvdK 7:6576a287e563 163 break;
LvdK 7:6576a287e563 164 }
LvdK 7:6576a287e563 165 case 100:
LvdK 7:6576a287e563 166 {
WillemBraat 13:d60c746c097c 167 //switch on backlighting to normal
WillemBraat 10:9a5f1b389973 168 BGL_LED = BGL_POT;
WillemBraat 10:9a5f1b389973 169 LightOn = 1;
WillemBraat 13:d60c746c097c 170 FullBright = 0;
LvdK 7:6576a287e563 171 break;
LvdK 7:6576a287e563 172 }
WillemBraat 13:d60c746c097c 173
WillemBraat 13:d60c746c097c 174 case 128:
WillemBraat 13:d60c746c097c 175 {
WillemBraat 13:d60c746c097c 176 //switch backlighting to MAX
WillemBraat 13:d60c746c097c 177 BGL_LED= 1;
WillemBraat 13:d60c746c097c 178 FullBright = 1;
WillemBraat 13:d60c746c097c 179 }
WillemBraat 13:d60c746c097c 180
LvdK 7:6576a287e563 181 case 255:
LvdK 7:6576a287e563 182 {
LvdK 7:6576a287e563 183 //calculate percentage from potmeter value
WillemBraat 13:d60c746c097c 184 if ( ( LightOn == 1) && (FullBright== 0) )
LvdK 7:6576a287e563 185 {
WillemBraat 10:9a5f1b389973 186 if ( BGL_POT < 0.01 )
WillemBraat 10:9a5f1b389973 187 {
WillemBraat 10:9a5f1b389973 188 BGL_LED = 0.0; //prevents flickering when low intensity
WillemBraat 10:9a5f1b389973 189 }
WillemBraat 10:9a5f1b389973 190 else
WillemBraat 10:9a5f1b389973 191 {
WillemBraat 10:9a5f1b389973 192 BGL_LED = BGL_POT;
WillemBraat 10:9a5f1b389973 193 }
LvdK 7:6576a287e563 194 }
WillemBraat 13:d60c746c097c 195 else if ( ( LightOn == 1) && (FullBright== 1) )
WillemBraat 13:d60c746c097c 196 {
WillemBraat 13:d60c746c097c 197 BGL_LED = 1;
WillemBraat 13:d60c746c097c 198
WillemBraat 13:d60c746c097c 199 }
LvdK 7:6576a287e563 200 }
LvdK 7:6576a287e563 201 }
WillemBraat 10:9a5f1b389973 202 }