APP 4
Dependencies: mbed CRC16 mbed-rtos
APP.cpp
- Committer:
- vinbel93
- Date:
- 2016-02-23
- Revision:
- 20:f0932bfe09ed
- Parent:
- 19:41e914ab0d19
- Child:
- 21:137d010e7469
- Child:
- 22:b855dbf3a8c1
- Child:
- 23:d41a23d8f2d7
File content as of revision 20:f0932bfe09ed:
#include "APP.h" #include "Manchester.h" #include "Frame.h" #include "MEF.h" Serial pc(USBTX, USBRX); DigitalOut out(p8); DigitalIn in(p30); bool clockTick = false; bitset<FRAMESIZE> message; bitset<MAX_DATA> decodedMessage; int debugMessage; bool debugMessageReady = false; bool dataReady; bool frameDropped; int counter = 0; unsigned int period = 0; unsigned int currentClocks = 0; bool periodCalculated = false; bool firstBit = true; bool value = false; MEF mef; STATES mefSTATE; int payloadSize = 0; int benchmark(void (*function) (void)) { int count = LPC_TIM2->TC; function(); return LPC_TIM2->TC - count; } extern "C" void TIMER1_IRQHandler() { if ((LPC_TIM1->IR & 0x01) == 0x01) // if MR0 interrupt, proceed { LPC_TIM1->IR |= 1 << 0; // Clear MR0 interrupt flag clockTick = !clockTick; out = encode(message[counter], clockTick); if (clockTick) { counter++; } if (counter >= FRAMESIZE) { LPC_TIM1->MR0 = 1000000000; } } } extern "C" void TIMER2_IRQHandler() { unsigned int clocks = LPC_TIM2->CR0; bool inputValue = in.read(); // Discard first bit if (!periodCalculated && !firstBit) { period = clocks / 2; periodCalculated = true; } if (firstBit) { mef.ReceiveBit(!inputValue); firstBit = false; } if (periodCalculated) { if (clocks >= period*1.5 || (currentClocks + clocks) >= period*1.5) { currentClocks = 0; mef.ReceiveBit(!inputValue); } else { currentClocks += clocks; } } LPC_TIM2->TC = 0; LPC_TIM2->IR |= 0xFFFFFFFF; // clear Timer interrupt register } void initTimers() { //Timer 1 (match) LPC_SC->PCLKSEL0 |= (1 << 4); // pclk = cclk timer1 LPC_SC->PCONP |= (1 << 2); // timer1 power on LPC_TIM1->MR0 = CLOCKS_TO_SECOND / 1000; // 100 ms LPC_TIM1->MCR = 3; // interrupt and reset control // Interrupt & reset timer on match LPC_TIM1->EMR = (3 << 4); NVIC_EnableIRQ(TIMER1_IRQn); // enable timer interrupt LPC_TIM1->TCR = 1; // enable Timer //Timer 2 (cap) LPC_SC->PCLKSEL1 |= (1 << 12); // pclk = cclk timer2 LPC_SC->PCONP |= (1 << 22); // timer2 power on LPC_TIM2->TC = 0; // clear timer counter LPC_TIM2->PC = 0; // clear prescale counter LPC_TIM2->PR = 0; // clear prescale register LPC_TIM2->TCR |= (1 << 1); // reset timer LPC_TIM2->TCR &= ~(1 << 1); // release reset LPC_TIM2->IR = 0xFFFFFFFF; // clear interrupt register LPC_TIM2->CCR |= 0x0000007; // enable rising-edge and falling-edge capture on 2.0 NVIC_EnableIRQ(TIMER2_IRQn); // enable timer interrupt LPC_TIM2->TCR = 1; // start Timer } int main() { message = buildFrame(convertToBits("BLUBLUBLUBLUBLU", 17), 17); LPC_PINCON->PINSEL0 |= (3 << 8); // P0.4 = CAP2.0 initTimers(); STATES tempState = BLU; while (true) { if (dataReady) { for (int i = 0; i < payloadSize * 8; i++) { if((i + 1) % 8 == 0) { char tempChar = (decodedMessage[i] << 0) | (decodedMessage[i - 1] << 1) | (decodedMessage[i - 2] << 2) | (decodedMessage[i - 3] << 3) | (decodedMessage[i - 4] << 4) | (decodedMessage[i - 5] << 5) | (decodedMessage[i - 6] << 6) | (decodedMessage[i - 7] << 7); pc.printf("%c", tempChar); } } dataReady = false; } if (tempState != mefSTATE) { pc.printf("\r\nNew state: %i \r\n", mefSTATE); tempState = mefSTATE; } if(frameDropped) { pc.printf("Frame dropped\r\n"); frameDropped = false; } if(debugMessageReady) { pc.printf("%i\r\n", debugMessage); debugMessageReady = false; } } } void bSToChar(bitset<8> bs) { } void _decodeCallback(bitset<MAX_DATA> decMessage, int size) { decodedMessage = decMessage; payloadSize = size; dataReady = true; } void _decodeError() { frameDropped = true; } void _updateState(STATES state) { mefSTATE = state; } void _mefDebug(int blu) { debugMessage = blu; debugMessageReady = true; }