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#include "dac.h"
#include "esp_err.h"
#include "i2c.h"
#include "esp_log.h"
#include "assert.h"
#include "driver/i2c.h"
#include "gpio-expander.h"
#include "hal/i2c_types.h"
#include <cstdint>
namespace gay_ipod {
static const char* TAG = "AUDIODAC";
AudioDac::AudioDac(GpioExpander *gpio) {
this->gpio_ = gpio;
};
AudioDac::~AudioDac() {};
esp_err_t AudioDac::Start() {
bool is_booted = WaitForPowerState([](bool booted, PowerState state){ return booted; });
if (!is_booted) {
ESP_LOGE(TAG, "Timed out waiting for boot");
return ESP_ERR_TIMEOUT;
}
WriteRegister(Register::DE_EMPHASIS, 1 << 4);
WriteVolume(100);
WaitForPowerState([](bool booted, PowerState state){
return state == WAIT_FOR_CP || state == RAMP_UP || state == RUN || state == STANDBY;
});
return ESP_OK;
}
void AudioDac::WriteVolume(uint8_t volume) {
WriteRegister(Register::DIGITAL_VOLUME_L, volume);
WriteRegister(Register::DIGITAL_VOLUME_R, volume);
}
std::pair<bool, AudioDac::PowerState> AudioDac::ReadPowerState() {
uint8_t result = 0;
I2CTransaction transaction;
transaction
.start()
.write_addr(kPCM5122Address, I2C_MASTER_WRITE)
.write_ack(DSP_BOOT_POWER_STATE)
.start()
.write_addr(kPCM5122Address, I2C_MASTER_READ)
.read(&result, I2C_MASTER_NACK)
.stop();
ESP_ERROR_CHECK(transaction.Execute());
bool is_booted = result >> 7;
PowerState detail = (PowerState) (result & 0b1111);
return std::pair(is_booted, detail);
}
bool AudioDac::WaitForPowerState(std::function<bool(bool,AudioDac::PowerState)> predicate) {
bool has_matched = false;
for (int i=0; i<10; i++) {
std::pair<bool, PowerState> result = ReadPowerState();
has_matched = predicate(result.first, result.second);
if (has_matched) {
break;
} else {
ESP_LOGI(TAG, "Waiting for power state (was %d %x)", result.first, (uint8_t) result.second);
vTaskDelay(pdMS_TO_TICKS(1));
}
}
return has_matched;
}
void AudioDac::WriteRegister(Register reg, uint8_t val) {
I2CTransaction transaction;
transaction
.start()
.write_addr(kPCM5122Address, I2C_MASTER_WRITE)
.write_ack(reg, val)
.stop();
// TODO: Retry once?
ESP_ERROR_CHECK(transaction.Execute());
}
} // namespace gay_ipod
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