Denver / Mbed 2 deprecated denver_train_proj

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Dependencies:   mbed TextLCD

main.cpp@3:fe7010b693a0, 2018-06-06 (annotated)

Committer:
mglmx
Date:
Wed Jun 06 14:06:57 2018 +0000
Revision:
3:fe7010b693a0
Parent:
2:f580707c44fa
Child:
4:50879dfb82d5
Child:
6:9789ad5f8b7f
LCD and potentiometer working.

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
mglmx 3:fe7010b693a0 5 DigitalOut Track(p20); //Digital output bit used to drive track power via H-bridge
mglmx 2:f580707c44fa 6 DigitalOut led1(LED1);
mglmx 2:f580707c44fa 7 DigitalOut led2(LED2);
mglmx 2:f580707c44fa 8 DigitalOut led3(LED3);
mglmx 3:fe7010b693a0 9 DigitalOut redled(p29);
mglmx 3:fe7010b693a0 10 DigitalOut greenled(p30);
mglmx 3:fe7010b693a0 11 DigitalIn switch1(p9);
mglmx 3:fe7010b693a0 12 TextLCD lcd(p22,p21,p23,p24,p25,p26);
mglmx 3:fe7010b693a0 13 AnalogIn pot(p19);
mglmx 1:0ab26889af9b 14
mglmx 1:0ab26889af9b 15 void DCC_send_command(unsigned int address, unsigned int inst, unsigned int repeat_count)
mglmx 1:0ab26889af9b 16 {
mglmx 1:0ab26889af9b 17 unsigned __int64 command = 0x0000000000000000; // __int64 is the 64-bit integer type
mglmx 1:0ab26889af9b 18 unsigned __int64 temp_command = 0x0000000000000000;
mglmx 1:0ab26889af9b 19 unsigned __int64 prefix = 0x3FFF; // 14 "1" bits needed at start
mglmx 1:0ab26889af9b 20 unsigned int error = 0x00; //error byte
mglmx 1:0ab26889af9b 21 //calculate error detection byte with xor
mglmx 1:0ab26889af9b 22 error = address ^ inst;
mglmx 1:0ab26889af9b 23 //combine packet bits in basic DCC format
mglmx 1:0ab26889af9b 24 command = (prefix<<28)|(address<<19)|(inst<<10)|((error)<<1)|0x01;
mglmx 1:0ab26889af9b 25 //printf("\n\r %llx \n\r",command);
mglmx 1:0ab26889af9b 26 int i=0;
mglmx 1:0ab26889af9b 27 //repeat DCC command lots of times
mglmx 1:0ab26889af9b 28 while(i < repeat_count) {
mglmx 1:0ab26889af9b 29 temp_command = command;
mglmx 1:0ab26889af9b 30 //loops through packet bits encoding and sending out digital pulses for a DCC command
mglmx 1:0ab26889af9b 31 for (int j=0; j<64; j++) {
mglmx 1:0ab26889af9b 32 if((temp_command&0x8000000000000000)==0) { //test packet bit
mglmx 1:0ab26889af9b 33 //send data for a "0" bit
mglmx 1:0ab26889af9b 34 Track=0;
mglmx 1:0ab26889af9b 35 wait_us(100);
mglmx 1:0ab26889af9b 36 Track=1;
mglmx 1:0ab26889af9b 37 wait_us(100);
mglmx 1:0ab26889af9b 38 //printf("0011");
mglmx 1:0ab26889af9b 39 } else {
mglmx 1:0ab26889af9b 40 //send data for a "1"bit
mglmx 1:0ab26889af9b 41 Track=0;
mglmx 1:0ab26889af9b 42 wait_us(58);
mglmx 1:0ab26889af9b 43 Track=1;
mglmx 1:0ab26889af9b 44 wait_us(58);
mglmx 1:0ab26889af9b 45 //printf("01");
mglmx 1:0ab26889af9b 46 }
mglmx 1:0ab26889af9b 47 // next bit in packet
mglmx 1:0ab26889af9b 48 temp_command = temp_command<<1;
mglmx 1:0ab26889af9b 49 }
mglmx 1:0ab26889af9b 50 i++;
mglmx 0:4d06a6a8e785 51 }
mglmx 0:4d06a6a8e785 52 }
mglmx 1:0ab26889af9b 53 //DCC train demo turns on headlight, dims headlight, and moves back and forth at half speed forever
mglmx 1:0ab26889af9b 54 int main()
mglmx 1:0ab26889af9b 55 {
mglmx 2:f580707c44fa 56 led1 = 1;
mglmx 2:f580707c44fa 57 wait(0.5);
mglmx 2:f580707c44fa 58 led1 = 0;
mglmx 2:f580707c44fa 59 wait(0.5);
mglmx 2:f580707c44fa 60 led1 = 1;
mglmx 1:0ab26889af9b 61 //typical out of box default engine DCC address is 3 (at least for Bachmann trains)
mglmx 1:0ab26889af9b 62 //Note: A DCC controller can reprogram the address whenever needed
mglmx 1:0ab26889af9b 63 unsigned int DCCaddress = 0x01;
mglmx 1:0ab26889af9b 64 //see http://www.nmra.org/standards/DCC/standards_rps/RP-921%202006%20Aug%2021.pdf
mglmx 1:0ab26889af9b 65 //01DCSSSS for speed, D is direction (fwd=1 and rev=0), C is speed(SSSSC) LSB
mglmx 1:0ab26889af9b 66 unsigned int DCCinst_forward = 0x68; //forward half speed
mglmx 1:0ab26889af9b 67 unsigned int DCCinst_reverse = 0x48; //reverse half speed
mglmx 1:0ab26889af9b 68 //100DDDDD for basic headlight functions
mglmx 1:0ab26889af9b 69 unsigned int DCC_func_lighton = 0x90; //F0 turns on headlight function
mglmx 1:0ab26889af9b 70 unsigned int DCC_func_dimlight = 0x91; //F0 + F1 dims headlight
mglmx 1:0ab26889af9b 71 //
mglmx 1:0ab26889af9b 72 //Basic DCC Demo Commands
mglmx 1:0ab26889af9b 73 DCC_send_command(DCCaddress,DCC_func_lighton,200); // turn light on full
mglmx 1:0ab26889af9b 74 DCC_send_command(DCCaddress,DCC_func_dimlight,200); //dim light
mglmx 1:0ab26889af9b 75 DCC_send_command(DCCaddress,DCC_func_lighton,200); //light full again
mglmx 2:f580707c44fa 76 led2 = 1;
mglmx 1:0ab26889af9b 77 while(1) {
mglmx 3:fe7010b693a0 78 float f = pot.read();
mglmx 3:fe7010b693a0 79 float vin = f * 3.3;
mglmx 3:fe7010b693a0 80
mglmx 2:f580707c44fa 81 led3 = 1;
mglmx 3:fe7010b693a0 82 if(switch1 == 1){
mglmx 3:fe7010b693a0 83 lcd.cls();
mglmx 3:fe7010b693a0 84 lcd.printf("Going forward");
mglmx 3:fe7010b693a0 85 greenled = 0;
mglmx 3:fe7010b693a0 86 redled = 1;
mglmx 3:fe7010b693a0 87 DCC_send_command(DCCaddress,DCCinst_forward,400); // forward half speed train address 3
mglmx 3:fe7010b693a0 88 lcd.cls();
mglmx 3:fe7010b693a0 89
mglmx 3:fe7010b693a0 90 lcd.printf("vin: %.4f",vin);
mglmx 3:fe7010b693a0 91 wait(0.2);
mglmx 3:fe7010b693a0 92
mglmx 3:fe7010b693a0 93 }else{
mglmx 3:fe7010b693a0 94 lcd.cls();
mglmx 3:fe7010b693a0 95 lcd.printf("Going backwards");
mglmx 3:fe7010b693a0 96 greenled = 1;
mglmx 3:fe7010b693a0 97 redled = 0;
mglmx 3:fe7010b693a0 98 DCC_send_command(DCCaddress,DCCinst_reverse,400); // reverse half speed train address 3
mglmx 3:fe7010b693a0 99 lcd.cls();
mglmx 3:fe7010b693a0 100
mglmx 3:fe7010b693a0 101 lcd.printf("vin: %.4f",vin);
mglmx 3:fe7010b693a0 102 wait(0.2);
mglmx 3:fe7010b693a0 103
mglmx 3:fe7010b693a0 104 }
mglmx 3:fe7010b693a0 105
mglmx 1:0ab26889af9b 106 }
mglmx 3:fe7010b693a0 107 }