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Added RH_ASK support for SAMD51 processor #58

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Added RH_ASK support for SAMD51 processor #58

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8f215e3
Added RH_ASK SAMD51 support
IoTPanic Oct 4, 2020
03cde69
Brought repo up to date
IoTPanic Oct 4, 2020
1c572cc
Change divider for better accuracy
IoTPanic Oct 5, 2020
af749de
Corrected math and increased precision
IoTPanic Oct 5, 2020
c73f900
Add line for 8 IRQs per bit time as per Wunder's suggestion
IoTPanic Oct 9, 2020
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Added RH_ASK SAMD51 support
@IoTPanic
IoTPanic committed Oct 4, 2020
commit 8f215e3c28235b80b26cd1e7b0f27149f3ca7de9
41 changes: 40 additions & 1 deletion RH_ASK.cpp
View file
Original file line number Diff line number Diff line change
@@ -5,7 +5,6 @@

#include <RH_ASK.h>
#include <RHCRC.h>

#if (RH_PLATFORM == RH_PLATFORM_STM32)
// Maple etc
HardwareTimer timer(MAPLE_TIMER);
@@ -234,6 +233,38 @@ void RH_ASK::timerSetup()
IntervalTimer *t = new IntervalTimer();
void TIMER1_COMPA_vect(void);
t->begin(TIMER1_COMPA_vect, 125000 / _speed);
#elif defined (__arm__) && defined(__SAMD51__)
// Arduino SAMD51
#define RH_ASK_M4_TIMER TC3
// Clock speed is 120MHz, prescaler of 256 is close to the 64 example below for samd21
#define RH_ASK_M4_PRESCALER 256
#define RH_ASK_M4_TIMER_IRQ TC3_IRQn

GCLK->PCHCTRL[TC3_GCLK_ID].reg = GCLK_PCHCTRL_GEN_GCLK1_Val |
(1 << GCLK_PCHCTRL_CHEN_Pos);

while (GCLK->SYNCBUSY.reg > 0);

TC3->COUNT16.CTRLA.bit.ENABLE = 0;
TC3->COUNT16.WAVE.bit.WAVEGEN = TC_WAVE_WAVEGEN_MFRQ;
while (TC3->COUNT16.SYNCBUSY.reg != 0) {}

TC3->COUNT16.INTENSET.reg = 0;
TC3->COUNT16.INTENSET.bit.MC0 = 1;

// Enable IRQ
NVIC_EnableIRQ(TC3_IRQn);

TC3->COUNT16.CTRLA.reg &= ~0b011100000000;
while (TC3->COUNT16.SYNCBUSY.reg != 0) {}

TC3->COUNT16.CTRLA.reg |= (uint32_t)TC_CTRLA_PRESCALER_DIV256;
while (TC3->COUNT16.SYNCBUSY.reg != 0) {}
uint32_t rc = (VARIANT_MCK / _speed) / RH_ASK_M4_PRESCALER / 8;
TC3->COUNT16.CC[0].reg = rc;
while (TC3->COUNT16.SYNCBUSY.reg != 0) {}
TC3->COUNT16.CTRLA.bit.ENABLE = 1;
while (TC3->COUNT16.SYNCBUSY.reg != 0) {}

#elif defined (__arm__) && defined(ARDUINO_ARCH_SAMD)
// Arduino Zero
@@ -604,6 +635,14 @@ void TIMER1_COMPA_vect(void)
{
thisASKDriver->handleTimerInterrupt();
}
#elif (RH_PLATFORM == RH_PLATFORM_ARDUINO) && defined (__arm__) && defined(__SAMD51__)

void TC3_Handler() {
if (TC3->COUNT16.INTFLAG.bit.MC0 == 1) {
TC3->COUNT16.INTFLAG.bit.MC0 = 1;
thisASKDriver->handleTimerInterrupt();
}
}

#elif (RH_PLATFORM == RH_PLATFORM_ARDUINO) && defined (__arm__) && defined(ARDUINO_ARCH_SAMD)
// Arduino Zero