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IODue.cpp
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/*
* Copyright (C) 2015,2016,2017,2018,2020 by Jonathan Naylor G4KLX
* Copyright (C) 2015 by Jim Mclaughlin KI6ZUM
* Copyright (C) 2016 by Colin Durbridge G4EML
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "Config.h"
#include "Globals.h"
#include "IO.h"
#if defined(__SAM3X8E__)
// An Arduino Due
#if defined(ARDUINO_DUE_PAPA)
#define PIN_COS 7
#define PIN_PTT 8
#define PIN_COSLED 11
#define PIN_DSTAR 16
#define PIN_DMR 17
#define PIN_YSF 18
#define PIN_P25 19
#define PIN_NXDN 20
#define PIN_POCSAG 4
#define PIN_FM 5
#define ADC_CHER_Chan (1<<7) // ADC on Due pin A0 - Due AD7 - (1 << 7)
#define ADC_ISR_EOC_Chan ADC_ISR_EOC7
#define ADC_CDR_Chan 7
#define DACC_MR_USER_SEL_Chan DACC_MR_USER_SEL_CHANNEL0 // DAC on Due DAC0
#define DACC_CHER_Chan DACC_CHER_CH0
#elif defined(ARDUINO_DUE_ZUM_V10)
#define PIN_COS 52
#define PIN_PTT 23
#define PIN_COSLED 22
#define PIN_DSTAR 9
#define PIN_DMR 8
#define PIN_YSF 7
#define PIN_P25 6
#define PIN_NXDN 5
#define PIN_POCSAG 4
#define PIN_FM 3
#define ADC_CHER_Chan (1<<13) // ADC on Due pin A11 - Due AD13 - (1 << 13)
#define ADC_ISR_EOC_Chan ADC_ISR_EOC13
#define ADC_CDR_Chan 13
#define DACC_MR_USER_SEL_Chan DACC_MR_USER_SEL_CHANNEL1 // DAC on Due DAC1
#define DACC_CHER_Chan DACC_CHER_CH1
#define RSSI_CHER_Chan (1<<1) // ADC on Due pin A6 - Due AD1 - (1 << 1)
#define RSSI_CDR_Chan 1
#elif defined(ARDUINO_DUE_NTH)
#define PIN_COS A7
#define PIN_PTT A8
#define PIN_COSLED A11
#define PIN_DSTAR 9
#define PIN_DMR 8
#define PIN_YSF 7
#define PIN_P25 6
#define PIN_NXDN 5
#define PIN_POCSAG 4
#define PIN_FM 3
#define ADC_CHER_Chan (1<<7) // ADC on Due pin A0 - Due AD7 - (1 << 7)
#define ADC_ISR_EOC_Chan ADC_ISR_EOC7
#define ADC_CDR_Chan 7
#define DACC_MR_USER_SEL_Chan DACC_MR_USER_SEL_CHANNEL0 // DAC on Due DAC0
#define DACC_CHER_Chan DACC_CHER_CH0
#define RSSI_CHER_Chan (1<<1) // ADC on Due pin A6 - Due AD1 - (1 << 1)
#define RSSI_CDR_Chan 1
#else
#error "Either ARDUINO_DUE_PAPA, ARDUINO_DUE_ZUM_V10, or ARDUINO_DUE_NTH need to be defined"
#endif
const uint16_t DC_OFFSET = 2048U;
extern "C" {
void ADC_Handler()
{
io.interrupt();
}
}
void CIO::initInt()
{
// Set up the TX, COS and LED pins
pinMode(PIN_PTT, OUTPUT);
pinMode(PIN_COSLED, OUTPUT);
pinMode(PIN_LED, OUTPUT);
pinMode(PIN_COS, INPUT);
#if defined(MODE_LEDS)
// Set up the mode output pins
pinMode(PIN_DSTAR, OUTPUT);
pinMode(PIN_DMR, OUTPUT);
pinMode(PIN_YSF, OUTPUT);
pinMode(PIN_P25, OUTPUT);
#if !defined(USE_ALTERNATE_NXDN_LEDS)
pinMode(PIN_NXDN, OUTPUT);
#endif
#if !defined(USE_ALTERNATE_POCSAG_LEDS)
pinMode(PIN_POCSAG, OUTPUT);
#endif
#if !defined(USE_ALTERNATE_POCSAG_LEDS)
pinMode(PIN_FM, OUTPUT);
#endif
#endif
}
void CIO::startInt()
{
if (ADC->ADC_ISR & ADC_ISR_EOC_Chan) // Ensure there was an End-of-Conversion and we read the ISR reg
io.interrupt();
// Set up the ADC
NVIC_EnableIRQ(ADC_IRQn); // Enable ADC interrupt vector
ADC->ADC_IDR = 0xFFFFFFFF; // Disable interrupts
ADC->ADC_IER = ADC_CHER_Chan; // Enable End-Of-Conv interrupt
ADC->ADC_CHDR = 0xFFFF; // Disable all channels
ADC->ADC_CHER = ADC_CHER_Chan; // Enable rx input channel
#if defined(SEND_RSSI_DATA)
ADC->ADC_CHER |= RSSI_CHER_Chan; // and RSSI input
#endif
ADC->ADC_CGR = 0x15555555; // All gains set to x1
ADC->ADC_COR = 0x00000000; // All offsets off
ADC->ADC_MR = (ADC->ADC_MR & 0xFFFFFFF0) | (1 << 1) | ADC_MR_TRGEN; // 1 = trig source TIO from TC0
#if defined(EXTERNAL_OSC)
// Set up the external clock input on PA4 = AI5
REG_PIOA_ODR = 0x10; // Set pin as input
REG_PIOA_PDR = 0x10; // Disable PIO A bit 4
REG_PIOA_ABSR &= ~0x10; // Select A peripheral = TCLK1 Input
#endif
// Set up the timer
pmc_enable_periph_clk(TC_INTERFACE_ID + 0*3+0) ; // Clock the TC0 channel 0
TcChannel* t = &(TC0->TC_CHANNEL)[0]; // Pointer to TC0 registers for its channel 0
t->TC_CCR = TC_CCR_CLKDIS; // Disable internal clocking while setup regs
t->TC_IDR = 0xFFFFFFFF; // Disable interrupts
t->TC_SR; // Read int status reg to clear pending
#if defined(EXTERNAL_OSC)
t->TC_CMR = TC_CMR_TCCLKS_XC1 | // Use XC1 = TCLK1 external clock
#else
t->TC_CMR = TC_CMR_TCCLKS_TIMER_CLOCK1 | // Use TCLK1 (prescale by 2, = 42MHz)
#endif
TC_CMR_WAVE | // Waveform mode
TC_CMR_WAVSEL_UP_RC | // Count-up PWM using RC as threshold
TC_CMR_EEVT_XC0 | // Set external events from XC0 (this setup TIOB as output)
TC_CMR_ACPA_CLEAR | TC_CMR_ACPC_CLEAR |
TC_CMR_BCPB_CLEAR | TC_CMR_BCPC_CLEAR;
#if defined(EXTERNAL_OSC)
t->TC_RC = EXTERNAL_OSC / 24000; // Counter resets on RC, so sets period in terms of the external clock
t->TC_RA = EXTERNAL_OSC / 48000; // Roughly square wave
#else
t->TC_RC = 1750; // Counter resets on RC, so sets period in terms of 42MHz internal clock
t->TC_RA = 880; // Roughly square wave
#endif
t->TC_CMR = (t->TC_CMR & 0xFFF0FFFF) | TC_CMR_ACPA_CLEAR | TC_CMR_ACPC_SET; // Set clear and set from RA and RC compares
t->TC_CCR = TC_CCR_CLKEN | TC_CCR_SWTRG; // re-enable local clocking and switch to hardware trigger source.
// Set up the DAC
pmc_enable_periph_clk(DACC_INTERFACE_ID); // Start clocking DAC
DACC->DACC_CR = DACC_CR_SWRST; // Reset DAC
DACC->DACC_MR =
DACC_MR_TRGEN_EN | DACC_MR_TRGSEL(1) | // Trigger 1 = TIO output of TC0
DACC_MR_USER_SEL_Chan | // Select channel
(24 << DACC_MR_STARTUP_Pos); // 24 = 1536 cycles which I think is in range 23..45us since DAC clock = 42MHz
DACC->DACC_IDR = 0xFFFFFFFF; // No interrupts
DACC->DACC_CHER = DACC_CHER_Chan; // Enable channel
digitalWrite(PIN_PTT, m_pttInvert ? HIGH : LOW);
digitalWrite(PIN_COSLED, LOW);
digitalWrite(PIN_LED, HIGH);
}
void CIO::interrupt()
{
if ((ADC->ADC_ISR & ADC_ISR_EOC_Chan) == ADC_ISR_EOC_Chan) { // Ensure there was an End-of-Conversion and we read the ISR reg
uint8_t control = MARK_NONE;
uint16_t sample = DC_OFFSET;
m_txBuffer.get(sample, control);
DACC->DACC_CDR = sample;
sample = ADC->ADC_CDR[ADC_CDR_Chan];
m_rxBuffer.put(sample, control);
#if defined(SEND_RSSI_DATA)
m_rssiBuffer.put(ADC->ADC_CDR[RSSI_CDR_Chan]);
#else
m_rssiBuffer.put(0U);
#endif
m_watchdog++;
}
}
bool CIO::getCOSInt()
{
return digitalRead(PIN_COS) == HIGH;
}
void CIO::setLEDInt(bool on)
{
digitalWrite(PIN_LED, on ? HIGH : LOW);
}
void CIO::setPTTInt(bool on)
{
digitalWrite(PIN_PTT, on ? HIGH : LOW);
}
void CIO::setCOSInt(bool on)
{
digitalWrite(PIN_COSLED, on ? HIGH : LOW);
}
void CIO::setDStarInt(bool on)
{
digitalWrite(PIN_DSTAR, on ? HIGH : LOW);
}
void CIO::setDMRInt(bool on)
{
digitalWrite(PIN_DMR, on ? HIGH : LOW);
}
void CIO::setYSFInt(bool on)
{
digitalWrite(PIN_YSF, on ? HIGH : LOW);
}
void CIO::setP25Int(bool on)
{
digitalWrite(PIN_P25, on ? HIGH : LOW);
}
void CIO::setNXDNInt(bool on)
{
#if defined(USE_ALTERNATE_NXDN_LEDS)
digitalWrite(PIN_YSF, on ? HIGH : LOW);
digitalWrite(PIN_P25, on ? HIGH : LOW);
#else
digitalWrite(PIN_NXDN, on ? HIGH : LOW);
#endif
}
void CIO::setPOCSAGInt(bool on)
{
#if defined(USE_ALTERNATE_POCSAG_LEDS)
digitalWrite(PIN_DSTAR, on ? HIGH : LOW);
digitalWrite(PIN_DMR, on ? HIGH : LOW);
#else
digitalWrite(PIN_POCSAG, on ? HIGH : LOW);
#endif
}
void CIO::setFMInt(bool on)
{
#if defined(USE_ALTERNATE_FM_LEDS)
digitalWrite(PIN_DSTAR, on ? HIGH : LOW);
digitalWrite(PIN_YSF, on ? HIGH : LOW);
#else
digitalWrite(PIN_FM, on ? HIGH : LOW);
#endif
}
void CIO::delayInt(unsigned int dly)
{
delay(dly);
}
#endif