monorepo

P3_SETR1/Core/Src/HTS221.c

@@ -0,0 +1,123 @@
+#include "stm32l4xx_hal.h"
+#include "HTS221.h"
+
+extern I2C_HandleTypeDef hi2c2;
+
+//Estructura para almacenar la calibración
+typedef struct{
+	//Valores de los registros
+	float H0_rH_x2;
+	float H1_rH_x2;
+
+	float T0_degC_x8;
+	float T1_degC_x8;
+
+	int16_t H0_T0_OUT;
+	int16_t H1_T0_OUT;
+
+	int16_t T0_OUT;
+	int16_t T1_OUT;
+
+	//Rectas de calibración para humedad y temperatura
+	float ha, hb;
+
+	float ta, tb;
+
+} HTS_Calibration;
+
+//Instancia de la calibración
+HTS_Calibration hts_cal;
+
+// Direcciones de los registros
+#define I2C_TH 0xBE
+#define HTS_H0_rH_x2 0x30
+#define HTS_H1_rH_x2 0x31
+#define HTS_T0_degC_x8	 0x32
+#define HTS_T1_degC_x8	 0x33
+
+#define HTS_T1_T0_MSB	 0x35
+#define HTS_H0_T0_OUT_LSB 0x36
+#define HTS_H0_T0_OUT_MSB 0x37
+
+#define HTS_H1_T0_OUT_LSB 0x3A
+#define HTS_H1_T0_OUT_MSB 0x3B
+
+#define HTS_T0_OUT_LSB 0x3C
+#define HTS_T0_OUT_MSB 0x3D
+
+#define HTS_T1_OUT_LSB 0x3E
+#define HTS_T1_OUT_MSB 0x3F
+
+
+void HTS221_UpdateCalibration(){
+	uint8_t buffer;
+	uint8_t tempMSB;
+
+
+	HAL_I2C_Mem_Read(&hi2c2, I2C_TH, HTS_H0_rH_x2, I2C_MEMADD_SIZE_8BIT, &buffer, 1, 1000);
+	hts_cal.H0_rH_x2 = buffer / 2.0f;
+
+	HAL_I2C_Mem_Read(&hi2c2, I2C_TH, HTS_H1_rH_x2, I2C_MEMADD_SIZE_8BIT, &buffer, 1, 1000);
+	hts_cal.H1_rH_x2 = buffer / 2.0f;
+
+	HAL_I2C_Mem_Read(&hi2c2, I2C_TH, HTS_T1_T0_MSB, I2C_MEMADD_SIZE_8BIT, &tempMSB, 1, 1000);
+
+	HAL_I2C_Mem_Read(&hi2c2, I2C_TH, HTS_T0_degC_x8, I2C_MEMADD_SIZE_8BIT, &buffer, 1, 1000);
+	hts_cal.T0_degC_x8 = (((tempMSB & 0x03) <<8) |  buffer) / 8.0f ;
+
+	HAL_I2C_Mem_Read(&hi2c2, I2C_TH, HTS_T1_degC_x8, I2C_MEMADD_SIZE_8BIT, &buffer, 1, 1000);
+	hts_cal.T1_degC_x8 =  (((tempMSB & 0x0C) <<6) |  buffer) / 8.0f ;
+
+	HAL_I2C_Mem_Read(&hi2c2, I2C_TH, HTS_H0_T0_OUT_LSB, I2C_MEMADD_SIZE_8BIT, &buffer, 1, 1000);
+	HAL_I2C_Mem_Read(&hi2c2, I2C_TH, HTS_H0_T0_OUT_MSB, I2C_MEMADD_SIZE_8BIT, &tempMSB, 1, 1000);
+	hts_cal.H0_T0_OUT = (tempMSB <<8) |  buffer;
+
+	HAL_I2C_Mem_Read(&hi2c2, I2C_TH, HTS_H1_T0_OUT_LSB, I2C_MEMADD_SIZE_8BIT, &buffer, 1, 1000);
+	HAL_I2C_Mem_Read(&hi2c2, I2C_TH, HTS_H1_T0_OUT_MSB, I2C_MEMADD_SIZE_8BIT, &tempMSB, 1, 1000);
+	hts_cal.H1_T0_OUT = (tempMSB <<8) |  buffer;
+
+	HAL_I2C_Mem_Read(&hi2c2, I2C_TH, HTS_T0_OUT_LSB, I2C_MEMADD_SIZE_8BIT, &buffer, 1, 1000);
+	HAL_I2C_Mem_Read(&hi2c2, I2C_TH, HTS_T0_OUT_MSB, I2C_MEMADD_SIZE_8BIT, &tempMSB, 1, 1000);
+	hts_cal.T0_OUT = (tempMSB <<8) |  buffer;
+
+	HAL_I2C_Mem_Read(&hi2c2, I2C_TH, HTS_T1_OUT_LSB, I2C_MEMADD_SIZE_8BIT, &buffer, 1, 1000);
+	HAL_I2C_Mem_Read(&hi2c2, I2C_TH, HTS_T1_OUT_MSB, I2C_MEMADD_SIZE_8BIT, &tempMSB, 1, 1000);
+	hts_cal.T1_OUT = (tempMSB <<8) |  buffer;
+
+
+	hts_cal.ha = (hts_cal.H1_rH_x2 - hts_cal.H0_rH_x2) / (hts_cal.H1_T0_OUT - hts_cal.H0_T0_OUT);
+
+	hts_cal.hb = hts_cal.H0_rH_x2 - hts_cal.ha*hts_cal.H0_T0_OUT;
+
+	hts_cal.ta = (hts_cal.T1_degC_x8 - hts_cal.T0_degC_x8) / (hts_cal.T1_OUT - hts_cal.T0_OUT);
+
+	hts_cal.tb = hts_cal.T0_degC_x8 - hts_cal.ha*hts_cal.T0_OUT;
+
+}
+
+void HTS221_Init() {
+	uint8_t buffer[1];
+	buffer[0] = 0x87;
+	HAL_I2C_Mem_Write(&hi2c2, 0xBE, 0x20, I2C_MEMADD_SIZE_8BIT, buffer, 1, 1000);
+	HTS221_UpdateCalibration();
+}
+
+THSample HTS221_Read() {
+	THSample ths;
+
+	uint8_t buffer[4];
+	HAL_I2C_Mem_Read(&hi2c2, 0xBE, 0x80 | 0x28, I2C_MEMADD_SIZE_8BIT, buffer, 4, 1000);
+
+	int16_t hum_raw;
+	int16_t temp_raw;
+
+	hum_raw = (buffer[1] << 8) | buffer[0];
+	temp_raw = (buffer[3] << 8) | buffer[2];
+
+	ths.hum = hts_cal.ha * hum_raw + hts_cal.hb;
+	ths.temp = hts_cal.ta * temp_raw + hts_cal.tb;
+
+	return ths;
+
+	return ths;
+}