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104 lines
3.1 KiB
C++
104 lines
3.1 KiB
C++
#include "i2c.h"
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#include "esphome/core/log.h"
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#include <memory>
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namespace esphome {
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namespace i2c {
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static const char *const TAG = "i2c";
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ErrorCode I2CDevice::read_register(uint8_t a_register, uint8_t *data, size_t len, bool stop) {
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ErrorCode err = this->write(&a_register, 1, stop);
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if (err != ERROR_OK)
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return err;
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return bus_->read(address_, data, len);
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}
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ErrorCode I2CDevice::read_register16(uint16_t a_register, uint8_t *data, size_t len, bool stop) {
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a_register = convert_big_endian(a_register);
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ErrorCode const err = this->write(reinterpret_cast<const uint8_t *>(&a_register), 2, stop);
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if (err != ERROR_OK)
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return err;
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return bus_->read(address_, data, len);
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}
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ErrorCode I2CDevice::write_register(uint8_t a_register, const uint8_t *data, size_t len, bool stop) {
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WriteBuffer buffers[2];
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buffers[0].data = &a_register;
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buffers[0].len = 1;
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buffers[1].data = data;
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buffers[1].len = len;
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return bus_->writev(address_, buffers, 2, stop);
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}
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ErrorCode I2CDevice::write_register16(uint16_t a_register, const uint8_t *data, size_t len, bool stop) {
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a_register = convert_big_endian(a_register);
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WriteBuffer buffers[2];
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buffers[0].data = reinterpret_cast<const uint8_t *>(&a_register);
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buffers[0].len = 2;
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buffers[1].data = data;
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buffers[1].len = len;
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return bus_->writev(address_, buffers, 2, stop);
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}
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bool I2CDevice::read_bytes_16(uint8_t a_register, uint16_t *data, uint8_t len) {
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if (read_register(a_register, reinterpret_cast<uint8_t *>(data), len * 2) != ERROR_OK)
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return false;
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for (size_t i = 0; i < len; i++)
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data[i] = i2ctohs(data[i]);
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return true;
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}
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bool I2CDevice::write_bytes_16(uint8_t a_register, const uint16_t *data, uint8_t len) {
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// we have to copy in order to be able to change byte order
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std::unique_ptr<uint16_t[]> temp{new uint16_t[len]};
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for (size_t i = 0; i < len; i++)
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temp[i] = htoi2cs(data[i]);
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return write_register(a_register, reinterpret_cast<const uint8_t *>(temp.get()), len * 2) == ERROR_OK;
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}
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I2CRegister &I2CRegister::operator=(uint8_t value) {
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this->parent_->write_register(this->register_, &value, 1);
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return *this;
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}
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I2CRegister &I2CRegister::operator&=(uint8_t value) {
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value &= get();
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this->parent_->write_register(this->register_, &value, 1);
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return *this;
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}
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I2CRegister &I2CRegister::operator|=(uint8_t value) {
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value |= get();
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this->parent_->write_register(this->register_, &value, 1);
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return *this;
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}
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uint8_t I2CRegister::get() const {
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uint8_t value = 0x00;
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this->parent_->read_register(this->register_, &value, 1);
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return value;
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}
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I2CRegister16 &I2CRegister16::operator=(uint8_t value) {
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this->parent_->write_register16(this->register_, &value, 1);
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return *this;
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}
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I2CRegister16 &I2CRegister16::operator&=(uint8_t value) {
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value &= get();
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this->parent_->write_register16(this->register_, &value, 1);
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return *this;
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}
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I2CRegister16 &I2CRegister16::operator|=(uint8_t value) {
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value |= get();
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this->parent_->write_register16(this->register_, &value, 1);
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return *this;
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}
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uint8_t I2CRegister16::get() const {
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uint8_t value = 0x00;
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this->parent_->read_register16(this->register_, &value, 1);
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return value;
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}
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} // namespace i2c
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} // namespace esphome
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