veles_labs/iaq_sensor_wired
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Added CO2 MODBUS readout

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dooku 2021-08-16 23:21:33 +02:00
parent 6830fabbd3
commit 8d2f2a6486
1 changed files with 21 additions and 5 deletions
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26
fw/Core/Src/main.c
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@ -50,6 +50,20 @@ const uint16_t tim21_prescaler = 60000-1; // 100Hz
//const uint16_t tim21_period = 12000-1; // 60s
const uint16_t tim21_period = 1200-1; // 6s
//const uint16_t tim21_period = 200-1; // 1s
/* Variables to store the measured data */
int CO2, T_SCD4x, RH_SCD4x;
int T_SHT4x, RH_SHT4x;
uint16_t sps30_measured_data[10];
/* TODO maybe use union for measured value?
* this would make modbus register readout easier */
union {
struct {
uint16_t CO2;
uint16_t T_SCD4x;
uint16_t RH_SCD4x;
};
uint16_t array[3];
} measured_values;
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
@ -66,6 +80,13 @@ static void MX_TIM21_Init(void);
/* USER CODE BEGIN 0 */
int8_t modbus_slave_callback(modbus_transaction_t *transaction)
{
if (transaction->function_code == MODBUS_READ_INPUT_REGISTERS) {
// TODO select reasonable register numbers and implement
// readout of all measured variables
if (transaction->register_number == 30010) { // register number 30010 (randomly selected)
transaction->input_registers[0] = CO2;
}
}
return MODBUS_ERROR_FUNCTION_NOT_IMPLEMENTED; /* nothing implemented yet! TODO */
}
@ -147,11 +168,6 @@ int main(void)
sps30_is_connected = 1;
}
/* Variables to store the measured data */
int CO2, T_SCD4x, RH_SCD4x;
int T_SHT4x, RH_SHT4x;
uint16_t sps30_measured_data[10];
/* Wait 1000ms for sensors initialization */
/* SHT4x Init Time: max 1 ms (datasheet pg. 8) */
/* SCD4x Init Time: max 1000 ms (datasheet pg. 6) */