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Create main ON/OFF method

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macphyter 2024-02-02 01:47:04 -07:00 committed by Georges Palauqui
parent a20e2ad87b
commit f76cdd804e
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GPG Key ID: 1E45F544CE4D04A5
3 changed files with 53 additions and 8 deletions
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56
main/TPS546.c
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@ -214,6 +214,17 @@ static uint16_t int_2_slinear11(int value)
result = (mantissa * 1024);
// int i;
// First see if the exponent is positive or negative
// if (value > 0) {
// exponent is positive
// } else {
// exponent is negative
// }
// First 5 bits is exponent in twos-complement
// check the first bit of the exponent to see if its negative
// if (value & 0x8000) {
@ -239,6 +250,9 @@ static uint16_t int_2_slinear11(int value)
/**
* @brief Convert a ULINEAR16 value into an int
* the exponent comes from the VOUT_MODE bits[4..0]
* stored in twos-complement
* The mantissa occupies the full 16-bits of the value
*/
static int ulinear16_2_int(uint16_t value)
{
@ -246,8 +260,6 @@ static int ulinear16_2_int(uint16_t value)
int result;
uint8_t voutmode;
/* the exponent comes from VOUT_MODE bits[4..0] */
/* in twos-complement */
smb_read_byte(PMBUS_VOUT_MODE, &voutmode);
if (voutmode & 0x10) {
// exponent is negative
@ -262,15 +274,16 @@ static int ulinear16_2_int(uint16_t value)
/**
* @brief Convert an int value into a ULINEAR16
*/
* the exponent comes from the VOUT_MODE bits[4..0]
* stored in twos-complement
* The mantissa occupies the full 16-bits of the result
**/
static uint16_t int_2_ulinear16(int value)
{
uint8_t voutmode;
float exponent;
int result;
/* the exponent comes from VOUT_MODE bits[4..0] */
/* in twos-complement */
smb_read_byte(PMBUS_VOUT_MODE, &voutmode);
if (voutmode & 0x10) {
// exponent is negative
@ -412,6 +425,9 @@ void TPS546_set_mfr_info(void)
/* Set all the relevant config registers for normal operation */
void TPS546_write_entire_config(void)
{
/* set up the ON_OFF_CONFIG */
smb_write_byte(PMBUS_ON_OFF_CONFIG, TPS546_INIT_ON_OFF_CONFIG);
/* Switch frequency */
smb_write_word(PMBUS_FREQUENCY_SWITCH, int_2_slinear11(TPS546_INIT_FREQUENCY));
@ -463,6 +479,8 @@ void TPS546_write_entire_config(void)
/* configure the bootup behavior regarding pin detect values vs NVM values */
smb_write_word(PMBUS_PIN_DETECT_OVERRIDE, INIT_PIN_DETECT_OVERRIDE);
/* TODO write new MFR_REVISION number to reflect these parameters */
/* store configuration in NVM */
smb_write_byte(PMBUS_STORE_USER_ALL, 0xFF);
@ -510,13 +528,35 @@ int TPS546_get_temperature(void)
return temp;
}
/**
* @brief Sets the core voltage
* this function controls the regulator ontput state
* send it the desired output in millivolts
* A value between TPS546_INIT_VOUT_MIN and TPS546_INIT_VOUT_MAX
* send a 0 to turn off the output
**/
void TPS546_set_vout(int millivolts)
{
uint16_t value;
value = int_2_ulinear16(millivolts);
smb_write_word(PMBUS_VOUT_COMMAND, value);
ESP_LOGI(TAG, "Vout changed to %d mV", millivolts);
if (millivolts == 0) {
/* turn off output */
smb_write_byte(PMBUS_OPERATION, OPERATION_OFF);
} else {
/* make sure we're in range */
if ((millivolts < TPS546_INIT_VOUT_MIN) || (millivolts > TPS546_INIT_VOUT_MAX)) {
ESP_LOGI(TAG, "ERR- Voltage requested is out of range");
} else {
/* set the output voltage */
value = int_2_ulinear16(millivolts);
smb_write_word(PMBUS_VOUT_COMMAND, value);
ESP_LOGI(TAG, "Vout changed to %d mV", millivolts);
/* turn on output */
smb_write_byte(PMBUS_OPERATION, OPERATION_ON);
}
}
}
void TPS546_show_voltage_settings(void)

4
main/TPS546.h
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@ -10,6 +10,10 @@
/* when the config revision stored in the TPS546 doesn't match, these values are used */
#define TPS546_INIT_ON_OFF_CONFIG 0x18 /* use ON_OFF command to control power */
#define OPERATION_OFF 0x00
#define OPERATION_ON 0x80
#define TPS546_INIT_FREQUENCY 650 /* KHz */
/* vin voltage */

1
main/pmbus_commands.h
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@ -1,5 +1,6 @@
/* Standard Core PMBus commands */
#define PMBUS_OPERATION 0x01
#define PMBUS_ON_OFF_CONFIG 0x02
#define PMBUS_CLEAR_FAULTS 0x03
#define PMBUS_PHASE 0x04