eurorack/stereo_mix/stereo_mix.cc

91 lines
2.5 KiB
C++

#include "avrlib/adc.h"
#include "avrlib/avrlib.h"
#include "avrlib/boot.h"
#include "avrlib/devices/mcp492x.h"
#include "avrlib/gpio.h"
#include "avrlib/spi.h"
#include "avrlib/time.h"
#include "avrlib/watchdog_timer.h"
#include "stereo_mix/resources.h"
using namespace avrlib;
using namespace stereo_mix;
typedef SpiMaster<NumberedGpio<0>, MSB_FIRST, 2> dac1Spi;
typedef Dac<dac1Spi, BUFFERED_REFERENCE, 1> Dac1;
typedef SpiMaster<NumberedGpio<1>, MSB_FIRST, 2> dac2Spi;
typedef Dac<dac2Spi, BUFFERED_REFERENCE, 1> Dac2;
typedef SpiMaster<NumberedGpio<2>, MSB_FIRST, 2> dac3Spi;
typedef Dac<dac3Spi, BUFFERED_REFERENCE, 1> Dac3;
typedef SpiMaster<NumberedGpio<3>, MSB_FIRST, 2> dac4Spi;
typedef Dac<dac4Spi, BUFFERED_REFERENCE, 1> Dac4;
typedef SpiMaster<NumberedGpio<4>, MSB_FIRST, 2> oDac1Spi;
typedef Dac<oDac1Spi, BUFFERED_REFERENCE, 0> oDac1;
typedef SpiMaster<NumberedGpio<5>, MSB_FIRST, 2> oDac2Spi;
typedef Dac<oDac2Spi, BUFFERED_REFERENCE, 0> oDac2;
typedef SpiMaster<NumberedGpio<6>, MSB_FIRST, 2> oDac3Spi;
typedef Dac<oDac3Spi, BUFFERED_REFERENCE, 0> oDac3;
typedef SpiMaster<NumberedGpio<7>, MSB_FIRST, 2> oDac4Spi;
typedef Dac<oDac4Spi, BUFFERED_REFERENCE, 0> oDac4;
typedef AdcInputScanner AnalogInputs;
#define NUM_CHANNELS 4
uint32_t volume[NUM_CHANNELS];
uint16_t pan[NUM_CHANNELS * 2];
int main(void)
{
Boot(true);
Dac1::Init();
Dac2::Init();
Dac3::Init();
Dac4::Init();
oDac1::Init();
oDac2::Init();
oDac3::Init();
oDac4::Init();
AnalogInputs::Init();
AnalogInputs::set_num_inputs(8);
#define WRITE(DAC, ODAC, N) \
DAC::Write((volume[N] * pan[N * NUM_CHANNELS]) >> 12, 0); \
ODAC::Write((volume[N] * pan[N * NUM_CHANNELS]) >> 12, 0); \
DAC::Write((volume[N] * pan[N * NUM_CHANNELS + 1]) >> 12, 1); \
ODAC::Write((volume[N] * pan[N * NUM_CHANNELS + 1]) >> 12, 1);
while (true) {
ResetWatchdog();
int i = AnalogInputs::current_pin() % NUM_CHANNELS;
volume[i] = pgm_read_word_near(lut_res_linear_to_exp + (AnalogInputs::Read(i) >> 1));
pan[i * NUM_CHANNELS] = pgm_read_word(lut_res_left_sin_pan + (AnalogInputs::Read(i + NUM_CHANNELS) >> 1));
pan[i * NUM_CHANNELS + 1] = pgm_read_word(lut_res_right_cos_pan + (AnalogInputs::Read(i + NUM_CHANNELS) >> 1));
switch (i) {
case 0:
WRITE(Dac1, oDac1, i);
break;
case 1:
WRITE(Dac2, oDac2, i);
break;
case 2:
WRITE(Dac3, oDac3, i);
break;
case 3:
WRITE(Dac4, oDac4, i);
break;
}
AnalogInputs::Scan();
}
}
TIMER_0_TICK
{
TickSystemClock();
}