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hlw811x.c
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hlw811x.c
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/*
* SPDX-FileCopyrightText: 2024 Kyunghwan Kwon <[email protected]>
*
* SPDX-License-Identifier: MIT
*/
#include "hlw811x.h"
#include "hlw811x_overrides.h"
#include <string.h>
#if !defined(HLW811X_MCLK)
#define HLW811X_MCLK (3579545UL) /* Hz (= 3.579545MHz) */
#endif
#if !defined(HLW811X_DEBUG)
#define HLW811X_DEBUG(...)
#endif
#if !defined(HLW811X_INFO)
#define HLW811X_INFO(...)
#endif
#if !defined(HLW811X_ERROR)
#define HLW811X_ERROR(...)
#endif
enum {
CMD_ENABLE_WRITE = 0xE5u,
CMD_DISABLE_WRITE = 0xDCu,
CMD_SET_CHANNEL_A = 0x5Au,
CMD_SET_CHANNEL_B = 0xA5u,
CMD_RESET_CHIP = 0x96u,
};
typedef hlw811x_error_t (*encoder_t)(uint8_t *buf, size_t bufsize,
const uint8_t *data, size_t datalen, size_t *encoded_len);
typedef hlw811x_error_t (*decoder_t)(uint8_t *buf, size_t bufsize,
const uint8_t *tx, size_t tx_len,
const uint8_t *rx, size_t rx_len, size_t *decoded_len);
typedef enum {
CALC_TYPE_RMS,
CALC_TYPE_POWER,
CALC_TYPE_ENERGY,
} calc_type_t;
struct calc_param {
hlw811x_reg_addr_t addr;
uint16_t coeff; /* calibration coefficient */
uint16_t ratio; /* resistor ratio */
hlw811x_pga_gain_t pga; /* PGA gain */
uint8_t mult; /* multiplier */
int64_t resol; /* resolution */
};
struct hlw811x {
hlw811x_interface_t iface;
struct hlw811x_resistor_ratio ratio;
struct hlw811x_coeff coeff;
struct hlw811x_pga pga;
};
static struct hlw811x m;
static int16_t convert_16bits_to_int16(const uint8_t buf[2])
{
#if defined(HLW811X_BIG_ENDIAN)
return (int16_t)((buf[1] << 8) | buf[0]);
#else
return (int16_t)((buf[0] << 8) | buf[1]);
#endif
}
static int32_t convert_24bits_to_int32(const uint8_t buf[3])
{
#if defined(HLW811X_BIG_ENDIAN)
return (int32_t)
((buf[2] << 16) | (buf[1] << 8) | buf[0]);
#else
return (int32_t)
((buf[0] << 16) | (buf[1] << 8) | buf[2]);
#endif
}
static int32_t convert_32bits_to_int32(const uint8_t buf[4])
{
#if defined(HLW811X_BIG_ENDIAN)
return (int32_t)
((buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]);
#else
return (int32_t)
((buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]);
#endif
}
static int32_t fix_bit24_sign(int32_t val)
{
if (val & (1 << 23)) {
val = (int32_t)((uint32_t)val & ((1U << 23) - 1)) * -1;
}
return val;
}
static uint16_t convert_float_to_uint16_centi(float val)
{
return (uint16_t)(val * 100);
}
static uint8_t get_regval_from_intr(hlw811x_intr_t ints)
{
switch (ints) {
case HLW811X_INTR_PULSE_OUT_A:
return 0;
case HLW811X_INTR_PULSE_OUT_B:
return 1;
case HLW811X_INTR_B_LEAKAGE:
return 2;
case HLW811X_INTR_IRQ:
return 3;
case HLW811X_INTR_OVERLOAD:
return 4;
case HLW811X_INTR_ACTIVE_POWER_OVERFLOW_A:
return 5;
case HLW811X_INTR_ACTIVE_POWER_OVERFLOW_B:
return 6;
case HLW811X_INTR_INSTANTAENOUS_UPDATED:
return 7;
case HLW811X_INTR_AVERAGE_UPDATED:
return 8;
case HLW811X_INTR_ZERO_CROSSING_VOLTAGE:
return 9;
case HLW811X_INTR_ZERO_CROSSING_CURRENT_A:
return 10;
case HLW811X_INTR_ZERO_CROSSING_CURRENT_B:
return 11;
case HLW811X_INTR_OVER_VOLTAGE:
return 12;
case HLW811X_INTR_UNDER_VOLTAGE:
return 13;
case HLW811X_INTR_OVER_CURRENT_A:
return 14;
case HLW811X_INTR_OVER_CURRENT_B:
return 15;
default:
return 0;
}
}
static hlw811x_error_t encode_uart(uint8_t *buf, size_t bufsize,
const uint8_t *data, size_t datalen, size_t *encoded_len)
{
if (bufsize < datalen + 2) {
HLW811X_ERROR("Buffer size is too small");
return HLW811X_BUFFER_TOO_SMALL;
}
buf[0] = 0xA5;
uint8_t chksum = buf[0];
for (size_t i = 0; i < datalen; i++) {
buf[i + 1] = data[i];
chksum += data[i];
}
buf[datalen + 1] = ~chksum;
*encoded_len = datalen + 2;
return HLW811X_ERROR_NONE;
}
static hlw811x_error_t decode_uart(uint8_t *buf, size_t bufsize,
const uint8_t *tx, size_t tx_len,
const uint8_t *rx, size_t rx_len, size_t *decoded_len)
{
if (tx_len < 1) {
HLW811X_ERROR("Invalid tx_len");
return HLW811X_INVALID_PARAM;
}
if (rx_len < 3 || bufsize < rx_len - 1) {
HLW811X_ERROR("Invalid rx_len");
return HLW811X_INVALID_PARAM;
}
uint8_t chksum = ~tx[tx_len - 1];
for (size_t i = 0; i < rx_len - 1; i++) {
buf[i] = rx[i];
chksum += rx[i];
}
if ((uint8_t)~chksum != rx[rx_len - 1]) {
HLW811X_ERROR("chksum mismatch %x : %x", ~chksum, rx[rx_len-1]);
return HLW811X_CHECKSUM_MISMATCH;
}
*decoded_len = rx_len - 1;
return HLW811X_ERROR_NONE;
}
static hlw811x_error_t encode(uint8_t *buf, size_t bufsize,
const uint8_t *data, size_t datalen, size_t *len)
{
encoder_t encoder = encode_uart;
if (m.iface == HLW811X_UART) {
} else {
HLW811X_ERROR("Not implemented");
return HLW811X_NOT_IMPLEMENTED;
}
return (*encoder)(buf, bufsize, data, datalen, len);
return HLW811X_ERROR_NONE;
}
static hlw811x_error_t decode(uint8_t *buf, size_t bufsize,
const uint8_t *tx, size_t tx_len,
const uint8_t *rx, size_t rx_len, size_t *len)
{
decoder_t decoder = decode_uart;
if (m.iface == HLW811X_UART) {
} else {
HLW811X_ERROR("Not implemented");
return HLW811X_NOT_IMPLEMENTED;
}
return (*decoder)(buf, bufsize, tx, tx_len, rx, rx_len, len);
}
static hlw811x_error_t encode_frame(hlw811x_reg_addr_t addr,
uint8_t *txbuf, size_t txbuf_len,
const uint8_t *data, size_t datalen,
size_t *frame_len)
{
uint8_t payload[datalen + 1];
if (datalen > 2 || (data == NULL && datalen != 0)) {
HLW811X_ERROR("Invalid parameter: %d, %x", datalen, data);
return HLW811X_INVALID_PARAM;
}
payload[0] = (uint8_t)addr;
for (size_t i = 0; i < datalen; i++) {
payload[i + 1] = data[i];
}
return encode(txbuf, txbuf_len, payload, datalen+1, frame_len);
}
static hlw811x_error_t decode_frame(uint8_t *buf, size_t bufsize,
const uint8_t *tx, size_t tx_len,
const uint8_t *rx, size_t rx_len)
{
size_t len;
hlw811x_error_t err;
if ((err = decode(buf, bufsize, tx, tx_len, rx, rx_len, &len))
!= HLW811X_ERROR_NONE) {
return err;
} else if (len != bufsize) {
HLW811X_ERROR("decoder returned %d", len);
return HLW811X_INCORRECT_RESPONSE;
}
return HLW811X_ERROR_NONE;
}
static void get_calc_param_rms(hlw811x_channel_t channel,
struct calc_param *param)
{
if (channel == HLW811X_CHANNEL_A) {
*param = (struct calc_param) {
.addr = HLW811X_REG_RMS_IA,
.coeff = m.coeff.rms.A,
.ratio = convert_float_to_uint16_centi(m.ratio.K1_A),
.pga = m.pga.A,
.resol = 1ll << 23,
};
} else if (channel == HLW811X_CHANNEL_B) {
*param = (struct calc_param) {
.addr = HLW811X_REG_RMS_IB,
.coeff = m.coeff.rms.B,
.ratio = convert_float_to_uint16_centi(m.ratio.K1_B),
.pga = m.pga.B,
.resol = 1ll << 23,
};
} else if (channel == HLW811X_CHANNEL_U) {
*param = (struct calc_param) {
.addr = HLW811X_REG_RMS_U,
.coeff = m.coeff.rms.U,
.ratio = convert_float_to_uint16_centi(m.ratio.K2),
.pga = m.pga.U,
.resol = 1ll << 22,
.mult = 10,
};
} else {
HLW811X_ERROR("Invalid channel: %d", channel);
}
}
static void get_calc_param_power(hlw811x_channel_t channel,
struct calc_param *param)
{
if (channel == HLW811X_CHANNEL_A) {
*param = (struct calc_param) {
.addr = HLW811X_REG_POWER_PA,
.coeff = m.coeff.power.A,
.ratio = convert_float_to_uint16_centi(m.ratio.K1_A),
.pga = m.pga.A,
};
} else if (channel == HLW811X_CHANNEL_B) {
*param = (struct calc_param) {
.addr = HLW811X_REG_POWER_PB,
.coeff = m.coeff.power.B,
.ratio = convert_float_to_uint16_centi(m.ratio.K1_B),
.pga = m.pga.B,
};
} else if (channel == HLW811X_CHANNEL_U) {
*param = (struct calc_param) {
.addr = HLW811X_REG_POWER_S,
.coeff = m.coeff.power.S,
.ratio = convert_float_to_uint16_centi(m.ratio.K2),
.pga = m.pga.U,
};
} else {
HLW811X_ERROR("Invalid channel: %d", channel);
}
param->resol = 1ll << 31;
}
static void get_calc_param_energy(hlw811x_channel_t channel,
struct calc_param *param)
{
if (channel == HLW811X_CHANNEL_A) {
*param = (struct calc_param) {
.addr = HLW811X_REG_ENERGY_PA,
.coeff = m.coeff.energy.A,
.ratio = convert_float_to_uint16_centi(m.ratio.K1_A),
.pga = m.pga.A,
};
} else if (channel == HLW811X_CHANNEL_B) {
*param = (struct calc_param) {
.addr = HLW811X_REG_ENERGY_PB,
.coeff = m.coeff.energy.B,
.ratio = convert_float_to_uint16_centi(m.ratio.K1_B),
.pga = m.pga.B,
};
} else {
HLW811X_ERROR("Invalid channel: %d", channel);
}
param->resol = 1ll << 29;
}
static void get_calc_param(hlw811x_channel_t channel,
calc_type_t type, struct calc_param *param)
{
memset(param, 0, sizeof(*param));
if (type == CALC_TYPE_RMS) {
get_calc_param_rms(channel, param);
} else if (type == CALC_TYPE_POWER) {
get_calc_param_power(channel, param);
} else if (type == CALC_TYPE_ENERGY) {
get_calc_param_energy(channel, param);
} else {
HLW811X_ERROR("Invalid type: %d", type);
}
}
static hlw811x_error_t send_frame(const uint8_t *data, size_t datalen)
{
int err;
if ((err = hlw811x_ll_write(data, datalen)) < 0) {
HLW811X_ERROR("hlw811x_ll_write() failed: %x", err);
return HLW811X_IO_ERROR;
}
if ((size_t)err != datalen) {
HLW811X_ERROR("tx len mismatch: %d != %d", err, datalen);
return HLW811X_IO_MISSING_BYTES;
}
return HLW811X_ERROR_NONE;
}
static hlw811x_error_t write_cmd(hlw811x_reg_addr_t addr,
const uint8_t *data, size_t datalen)
{
uint8_t frame[datalen + 1/*addr*/ + 2/*header+chksum*/];
size_t frame_len;
hlw811x_error_t err;
if ((err = encode_frame(addr | 0x80u, frame, sizeof(frame),
data, datalen, &frame_len))
!= HLW811X_ERROR_NONE) {
return err;
}
return send_frame(frame, frame_len);
}
static hlw811x_error_t reset_chip(void)
{
const uint8_t cmd = CMD_RESET_CHIP;
return write_cmd(HLW811X_REG_COMMAND, &cmd, 1);
}
static hlw811x_error_t enable_write(void)
{
const uint8_t cmd = CMD_ENABLE_WRITE;
return write_cmd(HLW811X_REG_COMMAND, &cmd, 1);
}
static hlw811x_error_t disable_write(void)
{
const uint8_t cmd = CMD_DISABLE_WRITE;
return write_cmd(HLW811X_REG_COMMAND, &cmd, 1);
}
static hlw811x_error_t write_reg(hlw811x_reg_addr_t addr,
const uint8_t *data, size_t datalen)
{
hlw811x_error_t err;
if ((err = enable_write()) != HLW811X_ERROR_NONE) {
HLW811X_ERROR("enable_write() failed");
return err;
}
if ((err = write_cmd(addr, data, datalen)) != HLW811X_ERROR_NONE) {
disable_write();
HLW811X_ERROR("write_cmd() failed");
return err;
}
if ((err = disable_write()) != HLW811X_ERROR_NONE) {
HLW811X_ERROR("disable_write() failed");
}
return err;
}
static hlw811x_error_t write_reg16(hlw811x_reg_addr_t addr, const uint16_t val)
{
uint8_t tmp[2] = { (uint8_t)(val >> 8), (uint8_t)val };
return write_reg(addr, tmp, sizeof(tmp));
}
static hlw811x_error_t read_reg(hlw811x_reg_addr_t addr,
uint8_t *buf, size_t bytes_to_read)
{
hlw811x_error_t err;
int bytes_received;
uint8_t rx[bytes_to_read + 1];
uint8_t tx[3];
size_t encoded_len;
size_t tx_len;
if ((err = encode_frame(addr, tx, sizeof(tx), 0, 0, &encoded_len))
!= HLW811X_ERROR_NONE) {
return err;
}
tx_len = encoded_len;
if (m.iface == HLW811X_UART) {
tx_len -= 1; /* do not send chksum */
}
if ((err = send_frame(tx, tx_len)) != HLW811X_ERROR_NONE) {
return err;
}
if ((bytes_received = hlw811x_ll_read(rx, sizeof(rx))) < 0) {
HLW811X_ERROR("hlw811x_ll_read() failed");
return HLW811X_IO_ERROR;
} else if (bytes_received == 0) {
return HLW811X_NO_RESPONSE;
}
err = decode_frame(buf, bytes_to_read, tx, encoded_len,
rx, (size_t)bytes_received);
return err;
}
static hlw811x_error_t read_reg16(hlw811x_reg_addr_t addr, uint16_t *reg)
{
uint8_t buf[2];
hlw811x_error_t err;
if ((err = read_reg(addr, buf, sizeof(buf))) != HLW811X_ERROR_NONE) {
return err;
}
*reg = (uint16_t)convert_16bits_to_int16(buf);
return err;
}
static hlw811x_error_t select_channel(hlw811x_channel_t channel)
{
uint8_t cmd;
switch (channel) {
case HLW811X_CHANNEL_A:
cmd = CMD_SET_CHANNEL_A;
break;
case HLW811X_CHANNEL_B:
cmd = CMD_SET_CHANNEL_B;
break;
default:
HLW811X_ERROR("Invalid channel: %d", channel);
return HLW811X_INVALID_PARAM;
}
return write_cmd(HLW811X_REG_COMMAND, &cmd, 1);
}
static hlw811x_error_t read_current_channel(hlw811x_channel_t *channel)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_STATUS, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
*channel = (hlw811x_channel_t)(((reg >> 21) & 0x01) + 1);
return HLW811X_ERROR_NONE;
}
hlw811x_error_t hlw811x_write_reg(hlw811x_reg_addr_t addr,
const uint8_t *data, size_t datalen)
{
return write_reg(addr, data, datalen);
}
hlw811x_error_t hlw811x_read_reg(hlw811x_reg_addr_t addr,
uint8_t *buf, size_t bufsize)
{
return read_reg(addr, buf, bufsize);
}
hlw811x_error_t hlw811x_set_active_power_calc_mode(hlw811x_active_power_mode_t
mode)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
reg &= ~(3 << 10); /* clear Pmode bit */
reg |= (mode << 10);
return write_reg16(HLW811X_REG_METER_CTRL, reg);
}
hlw811x_error_t hlw811x_get_active_power_calc_mode(hlw811x_active_power_mode_t
*mode)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
*mode = (hlw811x_active_power_mode_t)((reg >> 10) & 0x03);
return HLW811X_ERROR_NONE;
}
hlw811x_error_t hlw811x_set_rms_calc_mode(hlw811x_rms_mode_t mode)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
reg &= ~(3 << 9); /* clear DC_MODE bit */
reg |= (mode << 9);
return write_reg16(HLW811X_REG_METER_CTRL, reg);
}
hlw811x_error_t hlw811x_get_rms_calc_mode(hlw811x_rms_mode_t *mode)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
*mode = (hlw811x_rms_mode_t)((reg >> 9) & 0x03);
return HLW811X_ERROR_NONE;
}
hlw811x_error_t hlw811x_enable_pulse(hlw811x_channel_t channel)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
if (channel & HLW811X_CHANNEL_A) {
reg |= 1 << 0; /* PARUN */
}
if (channel & HLW811X_CHANNEL_B) {
reg |= 1 << 1; /* PBRUN */
}
return write_reg16(HLW811X_REG_METER_CTRL, reg);
}
hlw811x_error_t hlw811x_disable_pulse(hlw811x_channel_t channel)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
if (channel & HLW811X_CHANNEL_A) {
reg &= ~(1 << 0); /* PARUN */
}
if (channel & HLW811X_CHANNEL_B) {
reg &= ~(1 << 1); /* PBRUN */
}
return write_reg16(HLW811X_REG_METER_CTRL, reg);
}
hlw811x_error_t hlw811x_set_data_update_frequency(hlw811x_data_update_freq_t
freq)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL_2, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
reg &= ~(3 << 8); /* clear DUP bit */
reg |= (freq << 8);
return write_reg16(HLW811X_REG_METER_CTRL_2, reg);
}
hlw811x_error_t hlw811x_get_data_update_frequency(hlw811x_data_update_freq_t
*freq)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL_2, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
*freq = (hlw811x_data_update_freq_t)((reg >> 8) & 0x03);
return HLW811X_ERROR_NONE;
}
hlw811x_error_t hlw811x_set_channel_b_mode(hlw811x_channel_b_mode_t mode)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL_2, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
reg &= ~(1 << 7); /* clear CHS_IB bit */
reg |= (mode << 7);
return write_reg16(HLW811X_REG_METER_CTRL_2, reg);
}
hlw811x_error_t hlw811x_get_channel_b_mode(hlw811x_channel_b_mode_t *mode)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL_2, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
*mode = (hlw811x_channel_b_mode_t)((reg >> 7) & 0x01);
return HLW811X_ERROR_NONE;
}
hlw811x_error_t hlw811x_set_zerocrossing_mode(hlw811x_zerocrossing_mode_t mode)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
reg &= ~(3 << 7); /* clear ZXDx bits */
reg |= (mode << 7);
return write_reg16(HLW811X_REG_METER_CTRL_2, reg);
}
hlw811x_error_t hlw811x_get_zerocrossing_mode(hlw811x_zerocrossing_mode_t
*mode)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
*mode = (hlw811x_zerocrossing_mode_t)((reg >> 7) & 0x03);
return HLW811X_ERROR_NONE;
}
hlw811x_error_t hlw811x_enable_waveform(void)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL_2, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
reg |= 1 << 5; /* WaveEN */
return write_reg16(HLW811X_REG_METER_CTRL_2, reg);
}
hlw811x_error_t hlw811x_disable_waveform(void)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL_2, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
reg &= ~(1 << 5); /* WaveEN */
return write_reg16(HLW811X_REG_METER_CTRL_2, reg);
}
hlw811x_error_t hlw811x_enable_zerocrossing(void)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL_2, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
reg |= 1 << 2; /* ZxEN */
return write_reg16(HLW811X_REG_METER_CTRL_2, reg);
}
hlw811x_error_t hlw811x_disable_zerocrossing(void)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL_2, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
reg &= ~(1 << 2); /* ZxEN */
return write_reg16(HLW811X_REG_METER_CTRL_2, reg);
}
hlw811x_error_t hlw811x_enable_power_factor(void)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL_2, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
reg |= 1 << 6; /* PfactorEN */
return write_reg16(HLW811X_REG_METER_CTRL_2, reg);
}
hlw811x_error_t hlw811x_disable_power_factor(void)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL_2, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
reg &= ~(1 << 6); /* PfactorEN */
return write_reg16(HLW811X_REG_METER_CTRL_2, reg);
}
hlw811x_error_t hlw811x_enable_energy_clearance(hlw811x_channel_t channel)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL_2, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
if (channel & HLW811X_CHANNEL_A) {
reg &= ~(1 << 10); /* EPA_CA */
}
if (channel & HLW811X_CHANNEL_B) {
reg &= ~(1 << 11); /* EPA_CB */
}
return write_reg16(HLW811X_REG_METER_CTRL_2, reg);
}
hlw811x_error_t hlw811x_disable_energy_clearance(hlw811x_channel_t channel)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL_2, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
if (channel & HLW811X_CHANNEL_A) {
reg |= 1 << 10; /* EPA_CA */
}
if (channel & HLW811X_CHANNEL_B) {
reg |= 1 << 11; /* EPA_CB */
}
return write_reg16(HLW811X_REG_METER_CTRL_2, reg);
}
hlw811x_error_t hlw811x_enable_hpf(hlw811x_channel_t channel)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
if (channel & HLW811X_CHANNEL_U) {
reg &= ~(1 << 4); /* HPFUOFF */
}
if (channel & HLW811X_CHANNEL_A) {
reg &= ~(1 << 5); /* HPFAOFF */
}
if (channel & HLW811X_CHANNEL_B) {
reg &= ~(1 << 6); /* HPFBOFF */
}
return write_reg16(HLW811X_REG_METER_CTRL, reg);
}
hlw811x_error_t hlw811x_disable_hpf(hlw811x_channel_t channel)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
if (channel & HLW811X_CHANNEL_U) {
reg |= 1 << 4; /* HPFUOFF */
}
if (channel & HLW811X_CHANNEL_A) {
reg |= 1 << 5; /* HPFAOFF */
}
if (channel & HLW811X_CHANNEL_B) {
reg |= 1 << 6; /* HPFBOFF */
}
return write_reg16(HLW811X_REG_METER_CTRL, reg);
}
hlw811x_error_t hlw811x_enable_b_channel_comparator(void)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
reg &= ~(1 << 12); /* comp_off */
return write_reg16(HLW811X_REG_METER_CTRL, reg);
}
hlw811x_error_t hlw811x_disable_b_channel_comparator(void)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
reg |= 1 << 12; /* comp_off */
return write_reg16(HLW811X_REG_METER_CTRL, reg);
}
hlw811x_error_t hlw811x_enable_temperature_sensor(void)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
reg |= 1 << 13; /* tensor_en */
return write_reg16(HLW811X_REG_METER_CTRL, reg);
}
hlw811x_error_t hlw811x_disable_temperature_sensor(void)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
reg &= ~(1 << 13); /* tensor_en */
return write_reg16(HLW811X_REG_METER_CTRL, reg);
}
hlw811x_error_t hlw811x_enable_peak_detection(void)
{
hlw811x_error_t err;
uint16_t reg;
if ((err = read_reg16(HLW811X_REG_METER_CTRL_2, ®))
!= HLW811X_ERROR_NONE) {
return err;
}
reg |= 1 << 1; /* PeakEN */
return write_reg16(HLW811X_REG_METER_CTRL_2, reg);
}