g4klx/MMDVM
1
0
Fork 0
mirror of https://github.com/g4klx/MMDVM.git synced 2026-04-04 14:08:33 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

More work on Teensy interrupts.

Browse source
This commit is contained in:
Jonathan Naylor 2016-11-11 06:56:02 +00:00
parent 823b68d5ed
commit e97c1dc746
4 changed files with 50 additions and 35 deletions
Download patch file Download diff file Expand all files Collapse all files

71
IOTeensy.cpp
View file

@ -55,10 +55,17 @@
const uint16_t DC_OFFSET = 2048U;
extern "C" {
void pdb_isr()
void adc0_isr()
{
io.interrupt();
io.interrupt(0U);
}
#if defined(SEND_RSSI_DATA)
void adc1_isr()
{
io.interrupt(1U);
}
#endif
}
void CIO::initInt()
@ -80,6 +87,14 @@ void CIO::initInt()
void CIO::startInt()
{
if ((ADC0_SC1A & ADC_SC1_COCO) == ADC_SC1_COCO)
io.interrupt(0U);
#if defined(SEND_RSSI_DATA)
if ((ADC1_SC1A & ADC_SC1_COCO) == ADC_SC1_COCO)
io.interrupt(1U);
#endif
// Initialise ADC0
ADC0_CFG1 = ADC_CFG1_ADIV(1) | ADC_CFG1_ADICLK(1) | ADC_CFG1_MODE(1) |
ADC_CFG1_ADLSMP; // Single-ended 12 bits, long sample time
@ -95,6 +110,9 @@ void CIO::startInt()
sum0 = (sum0 / 2U) | 0x8000U;
ADC0_PG = sum0;
ADC0_SC1A = ADC_SC1_AIEN | PIN_ADC; // Enable ADC interrupt, use A0
NVIC_ENABLE_IRQ(IRQ_ADC0);
#if defined(SEND_RSSI_DATA)
// Initialise ADC1
ADC1_CFG1 = ADC_CFG1_ADIV(1) | ADC_CFG1_ADICLK(1) | ADC_CFG1_MODE(1) |
@ -110,6 +128,9 @@ void CIO::startInt()
uint16_t sum1 = ADC1_CLPS + ADC1_CLP4 + ADC1_CLP3 + ADC1_CLP2 + ADC1_CLP1 + ADC1_CLP0; // Plus side gain
sum1 = (sum1 / 2U) | 0x8000U;
ADC1_PG = sum1;
ADC1_SC1A = ADC_SC1_AIEN | PIN_RSSI; // Enable ADC interrupt, use A2
NVIC_ENABLE_IRQ(IRQ_ADC1);
#endif
// Setup PDB for ADC0 at 24 kHz
@ -138,41 +159,35 @@ void CIO::startInt()
digitalWrite(PIN_LED, HIGH);
}
void CIO::interrupt()
void CIO::interrupt(uint8_t source)
{
uint8_t control = MARK_NONE;
uint16_t sample = DC_OFFSET;
if (source == 0U) { // ADC0
uint8_t control = MARK_NONE;
uint16_t sample = DC_OFFSET;
m_txBuffer.get(sample, control);
*(int16_t *)&(DAC0_DAT0L) = sample;
m_txBuffer.get(sample, control);
*(int16_t *)&(DAC0_DAT0L) = sample;
ADC0_SC1A = PIN_ADC; // Start read on A0
// Wait for the read to complete
while ((ADC0_SC1A & ADC_SC1_COCO) != ADC_SC1_COCO)
;
sample = ADC0_RA;
m_rxBuffer.put(sample, control);
if ((ADC0_SC1A & ADC_SC1_COCO) == ADC_SC1_COCO) {
sample = ADC0_RA;
m_rxBuffer.put(sample, control);
#if !defined(SEND_RSSI_DATA)
m_rssiBuffer.put(0U);
m_rssiBuffer.put(0U);
#endif
}
m_watchdog++;
}
#if defined(SEND_RSSI_DATA)
ADC1_SC1A = PIN_RSSI; // Start read on A2
// Wait for the read to complete
while ((ADC1_SC1A & ADC_SC1_COCO) != ADC_SC1_COCO)
;
uint16_t rssi = ADC1_RA;
m_rssiBuffer.put(rssi);
if (source == 1U) { // ADC1
if ((ADC1_SC1A & ADC_SC1_COCO) == ADC_SC1_COCO) {
uint16_t rssi = ADC1_RA;
m_rssiBuffer.put(rssi);
}
}
#endif
PDB0_SC &= ~PDB_SC_PDBIF; // Clear interrupt flag
m_watchdog++;
}
bool CIO::getCOSInt()