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add: convert temperatures to degrees

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This commit is contained in:
Kilian Bracher 2025-03-26 16:28:43 +01:00
parent ba1c8c5905
commit e13e5c318b
2 changed files with 36 additions and 8 deletions
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2
AMS_Master_Code/Core/Lib/ADBMS6830B_Driver/Core/Src/ADBMS_Abstraction.c
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@ -161,7 +161,7 @@ HAL_StatusTypeDef amsAuxAndStatusMeasurement(Cell_Module (*module)[N_BMS]) {
CHECK_RETURN(readCMD(RDSTATA, rxbuf, STATUS_GROUP_A_SIZE));
for (size_t i = 0; i < N_BMS; i++) {
size_t offset = BUFFER_BMS_OFFSET(i, STATUS_GROUP_A_SIZE);
(*module)[i].internalDieTemp = rxbuf[offset + 2] | (rxbuf[offset + 3] << 8);
(*module)[i].internalDieTemp = (mV_from_ADBMS6830(rxbuf[offset + 2] | (rxbuf[offset + 3] << 8)) / 7.5) + 273; //datasheet page 72
}
CHECK_RETURN(readCMD(RDSTATB, rxbuf, STATUS_GROUP_B_SIZE));

42
AMS_Master_Code/Core/Src/main.c
View File

@ -61,7 +61,32 @@ static void MX_SPI1_Init(void);
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
uint32_t volatile logging_mask = 0b111111; // no LOG_LEVEL_NOISY
uint32_t volatile logging_mask = 0b11111; // no LOG_LEVEL_NOISY
#define NTC_A1 0.003354016f // see NTC RT csv from Vishay
#define NTC_B1 0.000300131f
#define NTC_C1 5.08516E-06f
#define NTC_D1 2.18765E-07f
#define NTC_R25 10000.0f // 10k ohm at 25C
#define NTC_R_DIVIDER 10000.0f
#define NTC_V_DIVIDER 5.000f // 5V
[[gnu::always_inline]]
static inline float ntc_ohms_to_celsius(float ohms) {
float log_ohms = logf(ohms / NTC_R25);
return 1.0f / (NTC_A1 + NTC_B1 * log_ohms + NTC_C1 * log_ohms * log_ohms + NTC_D1 * log_ohms * log_ohms * log_ohms) - 273.15f;
}
[[gnu::always_inline]]
static inline float ohms_from_ntc_v(float v) {
return (NTC_R_DIVIDER * v) / (NTC_V_DIVIDER - v);
}
static inline int ntc_mv_to_celsius(int mv) {
float v = (float)mv * 0.001f;
return (int)ntc_ohms_to_celsius(ohms_from_ntc_v(v));
}
/* USER CODE END 0 */
/**
@ -161,14 +186,17 @@ int main(void)
modules[i].auxVoltages[5], modules[i].auxVoltages[6],
modules[i].auxVoltages[7], modules[i].auxVoltages[8],
modules[i].auxVoltages[9]);
// Print temperatures
debug_log(LOG_LEVEL_INFO, " GPIO as temperatures (°C):");
debug_log(LOG_LEVEL_INFO, " G0: %4d G1: %4d G2: %4d G3: %4d G4: %4d",
modules[i].GPIO_Values[0], modules[i].GPIO_Values[1],
modules[i].GPIO_Values[2], modules[i].GPIO_Values[3],
modules[i].GPIO_Values[4]);
ntc_mv_to_celsius(modules[i].auxVoltages[0]), ntc_mv_to_celsius(modules[i].auxVoltages[1]),
ntc_mv_to_celsius(modules[i].auxVoltages[2]), ntc_mv_to_celsius(modules[i].auxVoltages[3]),
ntc_mv_to_celsius(modules[i].auxVoltages[4]));
debug_log(LOG_LEVEL_INFO, " G5: %4d G6: %4d G7: %4d G8: %4d G9: %4d",
modules[i].GPIO_Values[5], modules[i].GPIO_Values[6],
modules[i].GPIO_Values[7], modules[i].GPIO_Values[8],
modules[i].GPIO_Values[9]);
ntc_mv_to_celsius(modules[i].auxVoltages[5]), ntc_mv_to_celsius(modules[i].auxVoltages[6]),
ntc_mv_to_celsius(modules[i].auxVoltages[7]), ntc_mv_to_celsius(modules[i].auxVoltages[8]),
ntc_mv_to_celsius(modules[i].auxVoltages[9]));
debug_log(LOG_LEVEL_INFO, " Internal temp: %d, VAnalog: %d, VDigital: %d, VRef: %d",
modules[i].internalDieTemp, modules[i].analogSupplyVoltage,