![](/media/cache/group/default_image.jpg.50x50_q85.jpg)
first draft
Dependencies: mbed
main.cpp
- Committer:
- rcwinder
- Date:
- 2017-06-07
- Revision:
- 0:52e7cb6008d3
File content as of revision 0:52e7cb6008d3:
#include "mbed.h" const unsigned __int64 FORWARD = 1; const unsigned __int64 BACKWARD = 0; const unsigned __int64 LIGHTON = 1; const unsigned __int64 LIGHTOFF = 0; const unsigned __int64 SLOW = 0x4; //0100 = step 5 const unsigned __int64 NORM = 0x9; //1001 = step 15 const unsigned __int64 FAST = 0xE; //1110 = step 25 const unsigned __int64 STOP = 0x1; //0001 = E-STOP DigitalOut Track(p20); DigitalIn sign2(p14); DigitalIn sign21(p15); DigitalIn sign22(p13); DigitalOut buzz(p21); void DCC_send_command(unsigned int address, unsigned int inst, unsigned int repeat_count){ unsigned __int64 command = 0x0000000000000000; // this is a 64-bit integer type, due to the packet size unsigned __int64 temp_command = 0x0000000000000000; unsigned __int64 prefix = 0x3FFF; // 14 1 bits as in the preamble of the data packet unsigned int error = 0x00; // error byte //calculate error detection byte with xor error = address ^ inst; // combine packet bits in basic DCC format command = (prefix<<28)|(address<<19)|(inst<<10)|((error)<<1)|0x01; int i = 0; // repeat DCC command lots of times while(i < repeat_count) { temp_command = command; //loops throught packet bits enconding and sending out digital pulses for a DCC command for (int j=0; j<64; j++) { if((temp_command&0x8000000000000000)==0) { //test packet bit Track=0; wait_us(100); Track=1; wait_us(100); } else { Track=0; wait_us(58); Track=1; wait_us(58); } temp_command = temp_command<<1; } i++; } } unsigned __int64 create_instruction(){ unsigned __int64 instruction = 0x0; unsigned __int64 direction = FORWARD; unsigned __int64 lights = LIGHTON; unsigned __int64 speed = NORM; return instruction = (0x01<<6)|(direction<<5)|(lights<<4)|speed; } int main(){ unsigned __int64 train1 = 0x1; unsigned __int64 train3 = 0x3; unsigned __int64 def_repeat_count = 2; unsigned __int64 instruction = 0x0; buzz = 0; while(1){ if(sign21){ instruction = (0x01<<6)|(FORWARD<<5)|(LIGHTOFF<<4)|SLOW; buzz = 1; DCC_send_command(train3, instruction, def_repeat_count); } else if (sign2){ instruction = (0x01<<6)|(FORWARD<<5)|(LIGHTOFF<<4)|STOP; buzz = 1; DCC_send_command(train3, instruction, def_repeat_count); wait(3); instruction = (0x01<<6)|(FORWARD<<5)|(LIGHTOFF<<4)|SLOW; DCC_send_command(train3, instruction, def_repeat_count*20); } else if(sign22){ instruction = (0x01<<6)|(FORWARD<<5)|(LIGHTOFF<<4)|SLOW; buzz = 1; DCC_send_command(train3, instruction, def_repeat_count); } else { instruction = (0x01<<6)|(FORWARD<<5)|(LIGHTON<<4)|FAST; buzz = 0; DCC_send_command(train3, instruction, def_repeat_count); } } }