Denver / Mbed 2 deprecated denver_train_proj

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Dependencies:   mbed TextLCD

main.cpp@16:2a2da0e67793, 2018-06-07 (annotated)

Committer:
mglmx
Date:
Thu Jun 07 12:17:51 2018 +0000
Revision:
16:2a2da0e67793
Parent:
14:7bb998edd819
Child:
17:0a657e338356
Second time with interrupt

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mglmx 0:4d06a6a8e785 1 #include "mbed.h"
mglmx 3:fe7010b693a0 2 #include "TextLCD.h"
mglmx 1:0ab26889af9b 3 //mbed DCC Model Train Demo
mglmx 1:0ab26889af9b 4
carlosperales95 7:e2b8461d4f05 5 /******PINS AND DECLARATIONS*******/
carlosperales95 7:e2b8461d4f05 6
carlosperales95 7:e2b8461d4f05 7 ///p5
carlosperales95 7:e2b8461d4f05 8 ///p6
carlosperales95 7:e2b8461d4f05 9 ///p7
carlosperales95 7:e2b8461d4f05 10 ///p8
carlosperales95 7:e2b8461d4f05 11
carlosperales95 10:2088b1935a93 12 //RAIL SENSORS - INT0,INT1
carlosperales95 7:e2b8461d4f05 13 //INT0 - p9
carlosperales95 10:2088b1935a93 14 InterruptIn sensors0(p9);
carlosperales95 7:e2b8461d4f05 15 //INT1 - p10
carlosperales95 10:2088b1935a93 16 InterruptIn sensors1(p10);
carlosperales95 7:e2b8461d4f05 17
carlosperales95 7:e2b8461d4f05 18 ///p11
carlosperales95 7:e2b8461d4f05 19 ///p12
carlosperales95 12:e914ca5cd44b 20
carlosperales95 7:e2b8461d4f05 21 //M0 - p13
carlosperales95 7:e2b8461d4f05 22 DigitalIn d21(p13);
carlosperales95 7:e2b8461d4f05 23 //M1 - p14
carlosperales95 7:e2b8461d4f05 24 DigitalIn d22(p14);
carlosperales95 7:e2b8461d4f05 25 //M2 - p15
carlosperales95 7:e2b8461d4f05 26 DigitalIn d23(p15);
carlosperales95 12:e914ca5cd44b 27
carlosperales95 7:e2b8461d4f05 28 //p16
carlosperales95 12:e914ca5cd44b 29 //p17
carlosperales95 12:e914ca5cd44b 30
carlosperales95 11:021210c59a95 31 //BUZZER - p18
carlosperales95 11:021210c59a95 32 DigitalOut buzz(p18); // buzz=0 doesn't beep, buzz=1 beeps
carlosperales95 7:e2b8461d4f05 33
carlosperales95 7:e2b8461d4f05 34 //POTENTIOMETER - p19
carlosperales95 13:dbf1ead12cee 35 AnalogIn pot(p19); //Gives float value pot.read(). Convert analog input to V with f*3.3
carlosperales95 7:e2b8461d4f05 36
carlosperales95 7:e2b8461d4f05 37 //DAT - p20
mglmx 3:fe7010b693a0 38 DigitalOut Track(p20); //Digital output bit used to drive track power via H-bridge
carlosperales95 7:e2b8461d4f05 39
carlosperales95 7:e2b8461d4f05 40 //LCD SCREEN - p21, p22, p23, p24, p25, p26
carlosperales95 11:021210c59a95 41 TextLCD lcd(p22,p21,p23,p24,p25,p26); // RS, E, A4, A5, A6, A7 // ldc.cls() to clear and printf(String up to 16char)
carlosperales95 7:e2b8461d4f05 42
carlosperales95 7:e2b8461d4f05 43 ///p27
carlosperales95 7:e2b8461d4f05 44 ///p28
carlosperales95 7:e2b8461d4f05 45
carlosperales95 7:e2b8461d4f05 46 //LED1 - p29
mglmx 3:fe7010b693a0 47 DigitalOut redled(p29);
carlosperales95 7:e2b8461d4f05 48 //LED2 - p30
mglmx 3:fe7010b693a0 49 DigitalOut greenled(p30);
carlosperales95 7:e2b8461d4f05 50
mglmx 5:ce0f66ea12c5 51
mglmx 16:2a2da0e67793 52 //Rail sensors
mglmx 16:2a2da0e67793 53 InterruptIn int0(p9);
mglmx 16:2a2da0e67793 54 InterruptIn int1(p10);
mglmx 16:2a2da0e67793 55
mglmx 16:2a2da0e67793 56 //MCP
mglmx 16:2a2da0e67793 57 MCP23017 *mcp;
carlosperales95 12:e914ca5cd44b 58
carlosperales95 11:021210c59a95 59 //**************** FUNCTIONS FOR DENVER TRAIN ****************//
carlosperales95 10:2088b1935a93 60
mglmx 16:2a2da0e67793 61 void interrupt0(){
mglmx 16:2a2da0e67793 62 int data = mcp->readRegister(GPIO);
mglmx 16:2a2da0e67793 63 lcd.printf("int0 %d",data);
mglmx 16:2a2da0e67793 64 }
mglmx 16:2a2da0e67793 65
mglmx 16:2a2da0e67793 66 void interrupt1(){
mglmx 16:2a2da0e67793 67 int data = mcp->readRegister(GPIO);
mglmx 16:2a2da0e67793 68 lcd.printf("int1 %d",data);
mglmx 16:2a2da0e67793 69 }
mglmx 16:2a2da0e67793 70
mglmx 16:2a2da0e67793 71 void initalize_mcp(){
mglmx 16:2a2da0e67793 72 mcp = new MPC23017(p28,p27,0x40); //Connect to SCL - p28 and SDA - p27 and MPC I2C address 0x40
mglmx 16:2a2da0e67793 73
mglmx 16:2a2da0e67793 74 mcp->reset();
mglmx 16:2a2da0e67793 75 mcp->writeRegister(0x00, (unsigned char )0xff);
mglmx 16:2a2da0e67793 76 mcp->writeRegister(0x01, (unsigned char )0xff);
mglmx 16:2a2da0e67793 77 mcp->writeRegister(0x02, (unsigned char )0x00);
mglmx 16:2a2da0e67793 78 mcp->writeRegister(0x03, (unsigned char )0x00);
mglmx 16:2a2da0e67793 79 mcp->writeRegister(0x04, (unsigned char )0xff);
mglmx 16:2a2da0e67793 80 mcp->writeRegister(0x05, (unsigned char )0xff);
mglmx 16:2a2da0e67793 81 mcp->writeRegister(0x06, (unsigned char )0xff);
mglmx 16:2a2da0e67793 82 mcp->writeRegister(0x07, (unsigned char )0xff);
mglmx 16:2a2da0e67793 83 mcp->writeRegister(0x08, (unsigned char )0xff);
mglmx 16:2a2da0e67793 84 mcp->writeRegister(0x09, (unsigned char )0xff);
mglmx 16:2a2da0e67793 85 mcp->writeRegister(0x0a, (unsigned char )0x42);
mglmx 16:2a2da0e67793 86 mcp->writeRegister(0x0b, (unsigned char )0x42);
mglmx 16:2a2da0e67793 87 mcp->writeRegister(0x0c, (unsigned char )0x00);
mglmx 16:2a2da0e67793 88 mcp->writeRegister(0x0d, (unsigned char )0x00);
mglmx 16:2a2da0e67793 89 }
mglmx 5:ce0f66ea12c5 90
mglmx 1:0ab26889af9b 91
mglmx 1:0ab26889af9b 92 void DCC_send_command(unsigned int address, unsigned int inst, unsigned int repeat_count)
mglmx 1:0ab26889af9b 93 {
mglmx 1:0ab26889af9b 94 unsigned __int64 command = 0x0000000000000000; // __int64 is the 64-bit integer type
mglmx 1:0ab26889af9b 95 unsigned __int64 temp_command = 0x0000000000000000;
mglmx 1:0ab26889af9b 96 unsigned __int64 prefix = 0x3FFF; // 14 "1" bits needed at start
mglmx 1:0ab26889af9b 97 unsigned int error = 0x00; //error byte
mglmx 1:0ab26889af9b 98 //calculate error detection byte with xor
mglmx 1:0ab26889af9b 99 error = address ^ inst;
mglmx 1:0ab26889af9b 100 //combine packet bits in basic DCC format
mglmx 1:0ab26889af9b 101 command = (prefix<<28)|(address<<19)|(inst<<10)|((error)<<1)|0x01;
mglmx 1:0ab26889af9b 102 //printf("\n\r %llx \n\r",command);
mglmx 1:0ab26889af9b 103 int i=0;
mglmx 1:0ab26889af9b 104 //repeat DCC command lots of times
mglmx 1:0ab26889af9b 105 while(i < repeat_count) {
mglmx 1:0ab26889af9b 106 temp_command = command;
mglmx 1:0ab26889af9b 107 //loops through packet bits encoding and sending out digital pulses for a DCC command
mglmx 1:0ab26889af9b 108 for (int j=0; j<64; j++) {
mglmx 1:0ab26889af9b 109 if((temp_command&0x8000000000000000)==0) { //test packet bit
mglmx 1:0ab26889af9b 110 //send data for a "0" bit
mglmx 1:0ab26889af9b 111 Track=0;
mglmx 1:0ab26889af9b 112 wait_us(100);
mglmx 1:0ab26889af9b 113 Track=1;
mglmx 1:0ab26889af9b 114 wait_us(100);
mglmx 1:0ab26889af9b 115 //printf("0011");
mglmx 1:0ab26889af9b 116 } else {
mglmx 1:0ab26889af9b 117 //send data for a "1"bit
mglmx 1:0ab26889af9b 118 Track=0;
mglmx 1:0ab26889af9b 119 wait_us(58);
mglmx 1:0ab26889af9b 120 Track=1;
mglmx 1:0ab26889af9b 121 wait_us(58);
mglmx 1:0ab26889af9b 122 //printf("01");
mglmx 1:0ab26889af9b 123 }
mglmx 1:0ab26889af9b 124 // next bit in packet
mglmx 1:0ab26889af9b 125 temp_command = temp_command<<1;
mglmx 1:0ab26889af9b 126 }
mglmx 1:0ab26889af9b 127 i++;
mglmx 0:4d06a6a8e785 128 }
mglmx 0:4d06a6a8e785 129 }
carlosperales95 11:021210c59a95 130
carlosperales95 11:021210c59a95 131
carlosperales95 12:e914ca5cd44b 132
carlosperales95 11:021210c59a95 133 //**************** MAIN PROGRAM FOR DENVER TRAIN ****************//
carlosperales95 11:021210c59a95 134
mglmx 1:0ab26889af9b 135 int main()
mglmx 1:0ab26889af9b 136 {
mglmx 2:f580707c44fa 137 led1 = 1;
mglmx 2:f580707c44fa 138 wait(0.5);
mglmx 2:f580707c44fa 139 led1 = 0;
mglmx 2:f580707c44fa 140 wait(0.5);
mglmx 2:f580707c44fa 141 led1 = 1;
mglmx 16:2a2da0e67793 142
mglmx 16:2a2da0e67793 143 initialize_mcp();
mglmx 16:2a2da0e67793 144
mglmx 16:2a2da0e67793 145 int0.rise($interrupt0);
mglmx 16:2a2da0e67793 146 int1.rise($interrupt1);
mglmx 16:2a2da0e67793 147
mglmx 16:2a2da0e67793 148
mglmx 1:0ab26889af9b 149 //typical out of box default engine DCC address is 3 (at least for Bachmann trains)
mglmx 1:0ab26889af9b 150 //Note: A DCC controller can reprogram the address whenever needed
mglmx 1:0ab26889af9b 151 unsigned int DCCaddress = 0x01;
mglmx 1:0ab26889af9b 152 //see http://www.nmra.org/standards/DCC/standards_rps/RP-921%202006%20Aug%2021.pdf
mglmx 1:0ab26889af9b 153 //01DCSSSS for speed, D is direction (fwd=1 and rev=0), C is speed(SSSSC) LSB
mglmx 1:0ab26889af9b 154 unsigned int DCCinst_forward = 0x68; //forward half speed
mglmx 1:0ab26889af9b 155 unsigned int DCCinst_reverse = 0x48; //reverse half speed
mglmx 4:50879dfb82d5 156 unsigned int DCCinst_stop = 0x50;
mglmx 1:0ab26889af9b 157 //100DDDDD for basic headlight functions
mglmx 1:0ab26889af9b 158 unsigned int DCC_func_lighton = 0x90; //F0 turns on headlight function
mglmx 1:0ab26889af9b 159 unsigned int DCC_func_dimlight = 0x91; //F0 + F1 dims headlight
mglmx 1:0ab26889af9b 160 //
mglmx 1:0ab26889af9b 161 //Basic DCC Demo Commands
mglmx 1:0ab26889af9b 162 DCC_send_command(DCCaddress,DCC_func_lighton,200); // turn light on full
mglmx 1:0ab26889af9b 163 DCC_send_command(DCCaddress,DCC_func_dimlight,200); //dim light
mglmx 1:0ab26889af9b 164 DCC_send_command(DCCaddress,DCC_func_lighton,200); //light full again
mglmx 2:f580707c44fa 165 led2 = 1;
carlosperales95 14:7bb998edd819 166
carlosperales95 14:7bb998edd819 167 //Demo for stopping at the station
mglmx 1:0ab26889af9b 168 while(1) {
mglmx 4:50879dfb82d5 169
mglmx 4:50879dfb82d5 170 if(d21 == 1 || d22 == 1 || d23 == 1){
carlosperales95 14:7bb998edd819 171
mglmx 4:50879dfb82d5 172 lcd.cls();
mglmx 4:50879dfb82d5 173 lcd.printf("Choo Choo station");
carlosperales95 14:7bb998edd819 174 DCC_send_command(DCCaddress,DCCinst_stop,400); // Stop train address 3
mglmx 4:50879dfb82d5 175
mglmx 4:50879dfb82d5 176 }else{
carlosperales95 14:7bb998edd819 177 DCC_send_command(DCCaddress,DCCinst_forward,1); // Forward half speed train address 3
mglmx 4:50879dfb82d5 178 }
mglmx 4:50879dfb82d5 179
mglmx 4:50879dfb82d5 180
mglmx 4:50879dfb82d5 181 /*
mglmx 3:fe7010b693a0 182 float f = pot.read();
mglmx 3:fe7010b693a0 183 float vin = f * 3.3;
mglmx 3:fe7010b693a0 184
mglmx 2:f580707c44fa 185 led3 = 1;
mglmx 3:fe7010b693a0 186 if(switch1 == 1){
mglmx 3:fe7010b693a0 187 lcd.cls();
mglmx 3:fe7010b693a0 188 lcd.printf("Going forward");
mglmx 3:fe7010b693a0 189 greenled = 0;
mglmx 3:fe7010b693a0 190 redled = 1;
mglmx 3:fe7010b693a0 191 DCC_send_command(DCCaddress,DCCinst_forward,400); // forward half speed train address 3
mglmx 3:fe7010b693a0 192 lcd.cls();
mglmx 3:fe7010b693a0 193
mglmx 3:fe7010b693a0 194 lcd.printf("vin: %.4f",vin);
mglmx 3:fe7010b693a0 195 wait(0.2);
mglmx 3:fe7010b693a0 196
mglmx 3:fe7010b693a0 197 }else{
mglmx 3:fe7010b693a0 198 lcd.cls();
mglmx 3:fe7010b693a0 199 lcd.printf("Going backwards");
mglmx 3:fe7010b693a0 200 greenled = 1;
mglmx 3:fe7010b693a0 201 redled = 0;
mglmx 3:fe7010b693a0 202 DCC_send_command(DCCaddress,DCCinst_reverse,400); // reverse half speed train address 3
mglmx 3:fe7010b693a0 203 lcd.cls();
mglmx 3:fe7010b693a0 204
mglmx 3:fe7010b693a0 205 lcd.printf("vin: %.4f",vin);
mglmx 3:fe7010b693a0 206 wait(0.2);
mglmx 3:fe7010b693a0 207
mglmx 3:fe7010b693a0 208 }
mglmx 4:50879dfb82d5 209 */
mglmx 1:0ab26889af9b 210 }
mglmx 3:fe7010b693a0 211 }