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/*
* Copyright 2023 jacqueline <me@jacqueline.id.au>
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#include "wm8523.hpp"
#include <cstdint>
#include "esp_err.h"
#include "hal/i2c_types.h"
#include "i2c.hpp"
namespace drivers {
namespace wm8523 {
static const uint8_t kAddress = 0b0011010;
auto ReadRegister(Register reg) -> std::optional<uint16_t> {
uint8_t msb, lsb;
I2CTransaction transaction;
transaction.start()
.write_addr(kAddress, I2C_MASTER_WRITE)
.write_ack(static_cast<uint8_t>(reg))
.start()
.write_addr(kAddress, I2C_MASTER_READ)
.read(&msb, I2C_MASTER_ACK)
.read(&lsb, I2C_MASTER_LAST_NACK)
.stop();
if (transaction.Execute() != ESP_OK) {
return {};
}
return (msb << 8) & lsb;
}
auto WriteRegister(Register reg, uint16_t data) -> bool {
return WriteRegister(reg, (data >> 8) & 0xFF, data & 0xFF);
}
auto WriteRegister(Register reg, uint8_t msb, uint8_t lsb) -> bool {
I2CTransaction transaction;
transaction.start()
.write_addr(kAddress, I2C_MASTER_WRITE)
.write_ack(static_cast<uint8_t>(reg), msb, lsb)
.stop();
return transaction.Execute() == ESP_OK;
}
}
}
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