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create dedicated conversion functions

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macphyter 2024-01-21 18:59:14 -07:00 committed by Georges Palauqui
parent 628d3ac3de
commit c1b031ab36
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GPG Key ID: 1E45F544CE4D04A5
1 changed files with 24 additions and 29 deletions
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53
main/TPS546.c
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@ -40,14 +40,16 @@ esp_err_t smb_read_byte(uint8_t command, uint8_t *data)
ESP_ERROR_CHECK(i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, SMBUS_DEFAULT_TIMEOUT));
i2c_cmd_link_delete(cmd);
// TODO get an actual error status
return err;
}
/**
* @brief SMBus read word
*/
esp_err_t smb_read_word(uint8_t command, uint8_t *data)
esp_err_t smb_read_word(uint8_t command, uint16_t *result)
{
uint8_t data[2];
esp_err_t err = ESP_FAIL;
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
@ -62,6 +64,8 @@ esp_err_t smb_read_word(uint8_t command, uint8_t *data)
ESP_ERROR_CHECK(i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, SMBUS_DEFAULT_TIMEOUT));
i2c_cmd_link_delete(cmd);
*result = (data[1] << 8) + data[0];
// TODO get an actual error status
return err;
}
@ -91,6 +95,7 @@ static esp_err_t smb_read_block(uint8_t command, uint8_t * data, uint8_t len)
ESP_ERROR_CHECK(i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, SMBUS_DEFAULT_TIMEOUT));
i2c_cmd_link_delete(cmd);
// TODO get an actual error status
return 0;
}
@ -102,6 +107,8 @@ void TPS546_init(void)
uint16_t u16_value;
float temp;
int mantissa, exponent;
int millivolts;
float iout;
ESP_LOGI(TAG, "Initializing the core voltage regulator");
@ -114,39 +121,27 @@ void TPS546_init(void)
/* Get temperature (SLINEAR11) */
ESP_LOGI(TAG, "--------------------------------");
smb_read_word(PMBUS_READ_TEMPERATURE_1, data);
u16_value = (data[1] << 8) + data[0];
ESP_LOGI(TAG, "Temperature raw: %04x", u16_value);
if (u16_value & 0x400) {
// mantissa is negative
mantissa = -1 * ((~u16_value & 0x07FF) + 1);
} else {
mantissa = (u16_value & 0x07FF);
}
if (u16_value & 0x8000) {
// exponent is negative
exponent = -1 * (((~u16_value >> 11) & 0x001F) + 1);
} else {
exponent = (u16_value >> 11);
}
ESP_LOGI(TAG, "exp: %04x, mant: %04x", exponent, mantissa);
temp = mantissa * powf(2.0, exponent);
smb_read_word(PMBUS_READ_TEMPERATURE_1, &u16_value);
temp = slinear11_2_float(u16_value);
ESP_LOGI(TAG, "Temp: %2.1f", temp);
/* Get voltage setting (ULINEAR16) */
ESP_LOGI(TAG, "--------------------------------");
smb_read_byte(PMBUS_VOUT_MODE, &u8_value);
//ESP_LOGI(TAG, "VOUT mode: %02x", u8_value);
float mode_exponent = -1 * ((~u8_value & 0x1F) + 1);
//ESP_LOGI(TAG, "mode_exponent: %f", mode_exponent);
smb_read_word(PMBUS_VOUT_COMMAND, &u16_value);
millivolts = ulinear16_2_int(u16_value);
ESP_LOGI(TAG, "Vout set to: %d mV", millivolts);
smb_read_word(PMBUS_VOUT_COMMAND, data);
u16_value = (data[1] << 8) + data[0];
//ESP_LOGI(TAG, "VOUT: %d", u16_value);
float scaler = powf(2.0, mode_exponent);
//ESP_LOGI(TAG, "scaler: %f", scaler);
int voltage = (u16_value * scaler) * 1000;
ESP_LOGI(TAG, "Vout: %d mV", voltage);
/* Get voltage output (ULINEAR16) */
// ESP_LOGI(TAG, "--------------------------------");
// smb_read_word(PMBUS_READ_VOUT, &u16_value);
// millivolts = ulinear16_2_int(u16_value);
// ESP_LOGI(TAG, "Vout measured: %d mV", millivolts);
/* Get output current (SLINEAR11) */
ESP_LOGI(TAG, "--------------------------------");
smb_read_word(PMBUS_READ_IOUT, &u16_value);
iout = slinear11_2_float(u16_value);
ESP_LOGI(TAG, "Iout measured: %2.2f", iout);
}