us915 ch 9 20dbm
Dependents: DISCO-L072CZ-LRWAN1_LoRa_PingPong
Fork of SX1276GenericLib by
Diff: sx1276/arduino-mbed.cpp
- Revision:
- 65:b2d98328fcba
- Parent:
- 61:08b50780eb91
- Child:
- 66:fbb2da34bd9a
diff -r b721e6ab656a -r b2d98328fcba sx1276/arduino-mbed.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/sx1276/arduino-mbed.cpp Tue Jul 11 13:32:34 2017 +0200 @@ -0,0 +1,441 @@ +/* + * The file is Licensed under the Apache License, Version 2.0 + * (c) 2017 Helmut Tschemernjak + * 30826 Garbsen (Hannover) Germany + */ + +#ifdef ARDUINO + +using namespace std; + +#include "arduino-mbed.h" + + +static void pinInt00(void); +static void pinInt01(void); +static void pinInt02(void); +static void pinInt03(void); +static void pinInt04(void); +static void pinInt05(void); +static void pinInt06(void); +static void pinInt07(void); +static void pinInt08(void); +static void pinInt09(void); +static void pinInt10(void); +static void pinInt11(void); +static void pinInt12(void); +static void pinInt13(void); +static void pinInt14(void); +static void pinInt15(void); +static void pinInt16(void); +static void pinInt17(void); +static void pinInt18(void); +static void pinInt19(void); +static void pinInt20(void); +static void pinInt21(void); +static void pinInt22(void); +static void pinInt23(void); +static void pinInt24(void); +static void pinInt25(void); +static void pinInt26(void); +static void pinInt27(void); +static void pinInt28(void); +static void pinInt29(void); +static void pinInt30(void); +static void pinInt31(void); +static void pinInt32(void); +static void pinInt33(void); +static void pinInt34(void); +static void pinInt35(void); +static void pinInt36(void); +static void pinInt37(void); +static void pinInt38(void); +static void pinInt39(void); +static void pinInt40(void); +static void pinInt41(void); +static void pinInt42(void); +static void pinInt43(void); +static void pinInt44(void); +static void pinInt45(void); +static void pinInt46(void); +static void pinInt47(void); + + + +#define MAX_MCU_PINS 48 +class InterruptIn; +struct intPtrTable { + void (*func)(void); + InterruptIn *context; +} intPtrTable[MAX_MCU_PINS] = { + { pinInt00, NULL }, + { pinInt01, NULL }, + { pinInt02, NULL }, + { pinInt03, NULL }, + { pinInt04, NULL }, + { pinInt05, NULL }, + { pinInt06, NULL }, + { pinInt07, NULL }, + { pinInt08, NULL }, + { pinInt09, NULL }, + { pinInt10, NULL }, + { pinInt11, NULL }, + { pinInt12, NULL }, + { pinInt13, NULL }, + { pinInt14, NULL }, + { pinInt15, NULL }, + { pinInt16, NULL }, + { pinInt17, NULL }, + { pinInt18, NULL }, + { pinInt19, NULL }, + { pinInt20, NULL }, + { pinInt21, NULL }, + { pinInt22, NULL }, + { pinInt23, NULL }, + { pinInt24, NULL }, + { pinInt25, NULL }, + { pinInt26, NULL }, + { pinInt27, NULL }, + { pinInt28, NULL }, + { pinInt29, NULL }, + { pinInt30, NULL }, + { pinInt31, NULL }, + { pinInt32, NULL }, + { pinInt33, NULL }, + { pinInt34, NULL }, + { pinInt35, NULL }, + { pinInt36, NULL }, + { pinInt37, NULL }, + { pinInt38, NULL }, + { pinInt39, NULL }, + { pinInt40, NULL }, + { pinInt41, NULL }, + { pinInt42, NULL }, + { pinInt43, NULL }, + { pinInt44, NULL }, + { pinInt45, NULL }, + { pinInt46, NULL }, + { pinInt47, NULL } +}; // our max MCUs pins + + + +static void pinInt00(void) { InterruptIn::_irq_handler(intPtrTable[0].context); } +static void pinInt01(void) { InterruptIn::_irq_handler(intPtrTable[1].context); } +static void pinInt02(void) { InterruptIn::_irq_handler(intPtrTable[2].context); } +static void pinInt03(void) { InterruptIn::_irq_handler(intPtrTable[3].context); } +static void pinInt04(void) { InterruptIn::_irq_handler(intPtrTable[4].context); } +static void pinInt05(void) { InterruptIn::_irq_handler(intPtrTable[5].context); } +static void pinInt06(void) { InterruptIn::_irq_handler(intPtrTable[6].context); } +static void pinInt07(void) { InterruptIn::_irq_handler(intPtrTable[7].context); } +static void pinInt08(void) { InterruptIn::_irq_handler(intPtrTable[8].context); } +static void pinInt09(void) { InterruptIn::_irq_handler(intPtrTable[9].context); } +static void pinInt10(void) { InterruptIn::_irq_handler(intPtrTable[10].context); } +static void pinInt11(void) { InterruptIn::_irq_handler(intPtrTable[11].context); } +static void pinInt12(void) { InterruptIn::_irq_handler(intPtrTable[12].context); } +static void pinInt13(void) { InterruptIn::_irq_handler(intPtrTable[13].context); } +static void pinInt14(void) { InterruptIn::_irq_handler(intPtrTable[14].context); } +static void pinInt15(void) { InterruptIn::_irq_handler(intPtrTable[15].context); } +static void pinInt16(void) { InterruptIn::_irq_handler(intPtrTable[16].context); } +static void pinInt17(void) { InterruptIn::_irq_handler(intPtrTable[17].context); } +static void pinInt18(void) { InterruptIn::_irq_handler(intPtrTable[18].context); } +static void pinInt19(void) { InterruptIn::_irq_handler(intPtrTable[19].context); } +static void pinInt20(void) { InterruptIn::_irq_handler(intPtrTable[20].context); } +static void pinInt21(void) { InterruptIn::_irq_handler(intPtrTable[21].context); } +static void pinInt22(void) { InterruptIn::_irq_handler(intPtrTable[22].context); } +static void pinInt23(void) { InterruptIn::_irq_handler(intPtrTable[23].context); } +static void pinInt24(void) { InterruptIn::_irq_handler(intPtrTable[24].context); } +static void pinInt25(void) { InterruptIn::_irq_handler(intPtrTable[25].context); } +static void pinInt26(void) { InterruptIn::_irq_handler(intPtrTable[26].context); } +static void pinInt27(void) { InterruptIn::_irq_handler(intPtrTable[27].context); } +static void pinInt28(void) { InterruptIn::_irq_handler(intPtrTable[28].context); } +static void pinInt29(void) { InterruptIn::_irq_handler(intPtrTable[29].context); } +static void pinInt30(void) { InterruptIn::_irq_handler(intPtrTable[30].context); } +static void pinInt31(void) { InterruptIn::_irq_handler(intPtrTable[31].context); } +static void pinInt32(void) { InterruptIn::_irq_handler(intPtrTable[32].context); } +static void pinInt33(void) { InterruptIn::_irq_handler(intPtrTable[33].context); } +static void pinInt34(void) { InterruptIn::_irq_handler(intPtrTable[34].context); } +static void pinInt35(void) { InterruptIn::_irq_handler(intPtrTable[35].context); } +static void pinInt36(void) { InterruptIn::_irq_handler(intPtrTable[36].context); } +static void pinInt37(void) { InterruptIn::_irq_handler(intPtrTable[37].context); } +static void pinInt38(void) { InterruptIn::_irq_handler(intPtrTable[38].context); } +static void pinInt39(void) { InterruptIn::_irq_handler(intPtrTable[39].context); } +static void pinInt40(void) { InterruptIn::_irq_handler(intPtrTable[40].context); } +static void pinInt41(void) { InterruptIn::_irq_handler(intPtrTable[41].context); } +static void pinInt42(void) { InterruptIn::_irq_handler(intPtrTable[42].context); } +static void pinInt43(void) { InterruptIn::_irq_handler(intPtrTable[43].context); } +static void pinInt44(void) { InterruptIn::_irq_handler(intPtrTable[44].context); } +static void pinInt45(void) { InterruptIn::_irq_handler(intPtrTable[45].context); } +static void pinInt46(void) { InterruptIn::_irq_handler(intPtrTable[46].context); } +static void pinInt47(void) { InterruptIn::_irq_handler(intPtrTable[47].context); } + + + + +void +InterruptIn::rise(Callback<void()> func) { + if (_gpioPin >= MAX_MCU_PINS-1) + return; + if (func) { + _func = func; + intPtrTable[_gpioPin].context = this; + attachInterrupt(digitalPinToInterrupt(_gpioPin), intPtrTable[_gpioPin].func, RISING); + } else { + _func = InterruptIn::donothing; + intPtrTable[_gpioPin].context = NULL; + detachInterrupt(_gpioPin); + } +}; + +void +InterruptIn::fall(Callback<void()> func) { + if (func) { + _func = func; + intPtrTable[_gpioPin].context = this; + attachInterrupt(digitalPinToInterrupt(_gpioPin), intPtrTable[_gpioPin].func, FALLING); + } else { + _func = InterruptIn::donothing; + intPtrTable[_gpioPin].context = NULL; + detachInterrupt(_gpioPin); + } +} + + +#define MAX_TIMEOUTS 10 +class Timeout; +struct TimeoutVector { + Timeout *timer; + volatile uint32_t timeout; // us +} TimeOuts[MAX_TIMEOUTS]; + + +#if defined(__SAMD21G18A__) || defined(__SAMD21J18A__) +/* + * __SAMD21J18A__ is the SamD21 Explained Board + * __SAMD21G18A__ is Genuino Zero-Board (compatible with the LoRa board) + */ + +/* + * see tcc.h included from + * Arduino15/packages/arduino/tools/CMSIS-Atmel/1.1.0/CMSIS/ + * Device/ATMEL/samd21/include/component/tcc.h + */ +static const struct TCC_CONFIG { + Tcc *tcc_ptr; + IRQn_Type tcc_irq; + uint8_t nbits; +} TCC_CONFIG[] { + { TCC0, TCC0_IRQn, 24 }, + { TCC1, TCC1_IRQn, 24 }, + { TCC2, TCC2_IRQn, 16 }, +}; +#define USE_TCC 0 // TCC0, TTC1, TTC2 are working using the Arduino D21 + + +static bool initTimerDone = false; + +static void initTimer() { + Tcc *TC = TCC_CONFIG[USE_TCC].tcc_ptr; + + // Enable clock for TC, see gclk.h + if (TC == TCC0 || TC == TCC1) { + REG_GCLK_CLKCTRL = (uint16_t) (GCLK_CLKCTRL_CLKEN | GCLK_CLKCTRL_GEN_GCLK0 | GCLK_CLKCTRL_ID_TCC0_TCC1); + } else if (TC == TCC2) { + REG_GCLK_CLKCTRL = (uint16_t) (GCLK_CLKCTRL_CLKEN | GCLK_CLKCTRL_GEN_GCLK0 | GCLK_CLKCTRL_ID_TCC2_TC3_Val); + } + while (GCLK->STATUS.bit.SYNCBUSY == 1); // wait for sync + + TC->CTRLA.reg &= ~TCC_CTRLA_ENABLE; // Disable TC + while (TC->SYNCBUSY.bit.ENABLE == 1); // wait for sync + + TC->CTRLA.reg |= (TCC_CTRLA_PRESCALER_DIV1024 | TCC_CTRLA_RUNSTDBY); // Set perscaler + + TC->WAVE.reg |= TCC_WAVE_WAVEGEN_NFRQ; // Set wave form configuration + while (TC->SYNCBUSY.bit.WAVE == 1); // wait for sync + + TC->PER.bit.PER = 0xFFFFFF; // set counter top to max 24 bit + while (TC->SYNCBUSY.bit.PER == 1); // wait for sync + + // the compare counter TC->CC[0].reg will be set in the startTimer + // after the timeout calculation is known. + + // Interrupts + TC->INTENSET.reg = 0; // disable all interrupts + TC->INTENSET.bit.OVF = 1; // enable overfollow + TC->INTENSET.bit.MC0 = 1; // enable compare match to CC0 + + NVIC_EnableIRQ( TCC_CONFIG[USE_TCC].tcc_irq); // Enable InterruptVector + initTimerDone = true; +} + +static void stopTimer(void) +{ + Tcc *TC = TCC_CONFIG[USE_TCC].tcc_ptr; + + TC->CTRLA.reg &= ~TCC_CTRLA_ENABLE; // Disable TC + while (TC->SYNCBUSY.bit.ENABLE == 1); // wait for sync +} + +static void startTimer(uint32_t delay_us) +{ + Tcc *TC = TCC_CONFIG[USE_TCC].tcc_ptr; + + if (!initTimerDone) + initTimer(); // initial setup with stopped timer + + stopTimer(); // avoid timer interrupts while calculating + + /* + * every 21333 ns equals one tick (1/(48000000/1024)) + * COUNT*DIVIDER*SECS until interrupt + * 48 Mhz = (65536*1024)/1.398636s + */ + long long nclocks = delay_us * 1000; // ns; + nclocks = nclocks / 21333; + int nCounts = nclocks; + + int bits = TCC_CONFIG[USE_TCC].nbits; + int maxCounts = (uint32_t)(1<<bits)-1; + + if (nCounts > maxCounts) // if count exceeds timer capacity + nCounts = maxCounts; // set the largest posible count. + if (nCounts == 0) + nCounts = 1; + TC->CC[0].bit.CC = nCounts; + while (TC->SYNCBUSY.bit.CC0 == 1); // wait for sync + + TC->CTRLA.reg |= TCC_CTRLA_ENABLE ; // Enable TC + while (TC->SYNCBUSY.bit.ENABLE == 1); // wait for sync +#if 1 + Serial.print(millis(), DEC); + Serial.print(" startTimer: nCounts="); + Serial.println(nCounts, DEC); +#endif +} + + + +#if USE_TCC == 0 +void TCC0_Handler() +#elif USE_TCC == 1 +void TCC1_Handler() +#elif USE_TCC == 2 +void TCC2_Handler() +#endif +{ + static uint32_t last_usecs = 0; + Tcc *TC = TCC_CONFIG[USE_TCC].tcc_ptr; + uint32_t usecs = micros(); + uint32_t u_offset = 0; + + if (last_usecs && last_usecs < usecs) { + /* + * Problem is that the micros sometimes gives smaller values + * compared to previuos micros. As a workaround we all 1ms. + */ + u_offset = 1000; + } + last_usecs = usecs; + + /* + * Overflow means the max timer exeeded, we need restart the timer + * Interrupts and + */ + if (TC->INTFLAG.bit.OVF == 1) { // A overflow caused the interrupt + Serial.print("OVF\r\n"); + TC->INTFLAG.bit.OVF = 1; // writing a one clears the flag ovf flag + } + + if (TC->INTFLAG.bit.MC0 == 1) { // A compare to cc0 caused the interrupt + //Serial.print("MC0\r\n"); + TC->INTFLAG.bit.MC0 = 1; // writing a one clears the MCO (match capture) flag + } + + TC->CTRLA.reg &= ~TCC_CTRLA_ENABLE; // Disable TC + while (TC->SYNCBUSY.bit.ENABLE == 1); // wait for sync + + for (int i = 0; i < MAX_TIMEOUTS-1; i++) { + struct TimeoutVector *tvp = &TimeOuts[i]; + if (tvp->timer && tvp->timeout && usecs + u_offset >= tvp->timeout) { + Timeout *saveTimer = tvp->timer; + tvp->timer = NULL; + tvp->timeout = 0; + Timeout::_irq_handler(saveTimer); + } + } + /* + * we need to restart the timer for remaining interrupts + * we provide the interrupt entry time in usecs which means + * we don't count the irq_hander duration or debug prints + */ + Timeout::restart(usecs); +} + +#endif // D21 TCC Timer + +void +Timeout::insert(void) +{ + noInterrupts(); + for (int i = 0; i < MAX_TIMEOUTS-1; i++) { + struct TimeoutVector *tvp = &TimeOuts[i]; + if (tvp->timer == NULL) { + tvp->timeout = _timeout; + tvp->timer = this; + break; + } + } + interrupts(); +} + +void +Timeout::remove(void) +{ + noInterrupts(); + for (int i = 0; i < MAX_TIMEOUTS-1; i++) { + struct TimeoutVector *tvp = &TimeOuts[i]; + if (tvp->timer == this) { + tvp->timer = NULL; + tvp->timeout = 0; + break; + } + } + interrupts(); +} + + +void +Timeout::restart(uint32_t usecs) +{ + uint32_t timeout = ~0; + + /* + * find the lowest timeout value which is our the next timeout + * zero means stop the timer. + */ + noInterrupts(); + for (int i = 0; i < MAX_TIMEOUTS-1; i++) { + struct TimeoutVector *tvp = &TimeOuts[i]; + if (tvp->timer && tvp->timeout > 0) { + if (tvp->timeout < timeout) { + timeout = tvp->timeout; + } + } + } + interrupts(); + + if (timeout == (uint32_t)~0) { + stopTimer(); + return; + } + if (!usecs) + usecs = micros(); + + if (timeout > usecs) { + startTimer(timeout - usecs); + return; + } else { + startTimer(1); // just one usec to trigger interrrupt + } +} +#endif // ARDUINO