added libs for AS6221 temperature sensor and SHT40 humidity and temperature sensor
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AS6221.c
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201
AS6221.c
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/*
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* AS6221.c
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*
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* Created on: Nov 15, 2021
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* Author: angoosh
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*/
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#include "AS6221.h"
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#include "main.h"
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extern I2C_HandleTypeDef AS6221_I2C_HANDLE;
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float AS6221_Read_Temperature();
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int AS6221_Register(SETUP_REG reg, uint8_t value, ACCESS_OP rw);
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/*
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* @brief Reads temperature measured by sensor
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* @retval temperature in C
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*/
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float AS6221_Read_Temperature(){
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uint8_t temp_raw[2];
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uint16_t temp_bin = 0;
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double temp = 0;
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uint8_t index[1] = {1};
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HAL_I2C_Master_Transmit(&AS6221_I2C_HANDLE, (AS6221_ADDRESS << 1), index, 2, 0xFFFF);
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HAL_I2C_Master_Receive(&AS6221_I2C_HANDLE, (AS6221_ADDRESS << 1), temp_raw, 2, 0xFFFF);
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temp_bin = temp_raw[0] * 256 + temp_raw[1];
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if(temp_bin >= 0x8000){//is negative
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temp = ((~(temp_bin - 1)) * LSB) * (-1);
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}
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else{//is positive
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temp = temp_bin * LSB;
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}
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return temp;
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}
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/*
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* @brief Reads and Writes to control register
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* @param register
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* @param value to write
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* @param access operation: R,W,RW
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* @retval register contents
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*/
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int AS6221_Register(SETUP_REG reg, uint8_t value, ACCESS_OP rw){
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uint8_t conf_reg[2];
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uint8_t index[1] = {1};
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HAL_I2C_Master_Transmit(&AS6221_I2C_HANDLE, (AS6221_ADDRESS << 1), index, 2, 0xFFFF);
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HAL_I2C_Master_Receive(&AS6221_I2C_HANDLE, (AS6221_ADDRESS << 1), conf_reg, 2, 0xFFFF);
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switch(reg){
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case AL:
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return ((conf_reg[0] & 0x04) >> 2);
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case CR:
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if(rw == R){
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return (conf_reg[0] & 0x03);
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}
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else if(rw == W){
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value = value & 0x03;
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conf_reg[0] = (conf_reg[0] & ~(0x03 << 0));
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conf_reg[0] = (conf_reg[0] | (value << 0));
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uint8_t msg[3] = {index[0], conf_reg[0], conf_reg[1]};
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HAL_I2C_Master_Transmit(&AS6221_I2C_HANDLE, (AS6221_ADDRESS << 1), msg, 4, 0xFFFF);
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}
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else{
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value = value & 0x03;
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uint8_t retVal =(conf_reg[0] & 0x03);
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conf_reg[0] = (conf_reg[0] & ~(0x03 << 0));
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conf_reg[0] = (conf_reg[0] | (value << 0));
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uint8_t msg[3] = {index[0], conf_reg[0], conf_reg[1]};
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HAL_I2C_Master_Transmit(&AS6221_I2C_HANDLE, (AS6221_ADDRESS << 1), msg, 4, 0xFFFF);
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return retVal;
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}
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case SM:
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if(rw == R){
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return (conf_reg[1] & 0x80);
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}
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else if(rw == W){
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value = value & 0x01;
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conf_reg[1] = (conf_reg[1] & ~(0x01 << 7));
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conf_reg[1] = (conf_reg[1] | (value << 7));
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uint8_t msg[3] = {index[0], conf_reg[0], conf_reg[1]};
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HAL_I2C_Master_Transmit(&AS6221_I2C_HANDLE, (AS6221_ADDRESS << 1), msg, 4, 0xFFFF);
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}
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else{
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value = value & 0x01;
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uint8_t retVal =(conf_reg[1] & 0x80);
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conf_reg[1] = (conf_reg[1] & ~(0x01 << 7));
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conf_reg[1] = (conf_reg[1] | (value << 7));
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uint8_t msg[3] = {index[0], conf_reg[0], conf_reg[1]};
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HAL_I2C_Master_Transmit(&AS6221_I2C_HANDLE, (AS6221_ADDRESS << 1), msg, 4, 0xFFFF);
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return retVal;
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}
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case IM:
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if(rw == R){
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return (conf_reg[1] & 0x40);
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}
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else if(rw == W){
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value = value & 0x01;
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conf_reg[1] = (conf_reg[1] & ~(0x01 << 6));
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conf_reg[1] = (conf_reg[1] | (value << 6));
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uint8_t msg[3] = {index[0], conf_reg[0], conf_reg[1]};
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HAL_I2C_Master_Transmit(&AS6221_I2C_HANDLE, (AS6221_ADDRESS << 1), msg, 4, 0xFFFF);
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}
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else{
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value = value & 0x01;
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uint8_t retVal =(conf_reg[1] & 0x40);
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conf_reg[1] = (conf_reg[1] & ~(0x01 << 6));
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conf_reg[1] = (conf_reg[1] | (value << 6));
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uint8_t msg[3] = {index[0], conf_reg[0], conf_reg[1]};
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HAL_I2C_Master_Transmit(&AS6221_I2C_HANDLE, (AS6221_ADDRESS << 1), msg, 4, 0xFFFF);
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return retVal;
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}
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case POL:
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if(rw == R){
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return (conf_reg[1] & 0x20);
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}
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else if(rw == W){
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value = value & 0x01;
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conf_reg[1] = (conf_reg[1] & ~(0x01 << 5));
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conf_reg[1] = (conf_reg[1] | (value << 5));
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uint8_t msg[3] = {index[0], conf_reg[0], conf_reg[1]};
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HAL_I2C_Master_Transmit(&AS6221_I2C_HANDLE, (AS6221_ADDRESS << 1), msg, 4, 0xFFFF);
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}
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else{
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value = value & 0x01;
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uint8_t retVal =(conf_reg[1] & 0x20);
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conf_reg[1] = (conf_reg[1] & ~(0x01 << 5));
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conf_reg[1] = (conf_reg[1] | (value << 5));
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uint8_t msg[3] = {index[0], conf_reg[0], conf_reg[1]};
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HAL_I2C_Master_Transmit(&AS6221_I2C_HANDLE, (AS6221_ADDRESS << 1), msg, 4, 0xFFFF);
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return retVal;
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}
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case CF:
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if(rw == R){
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return (conf_reg[1] & 0x18);
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}
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else if(rw == W){
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value = value & 0x03;
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conf_reg[1] = (conf_reg[1] & ~(0x03 << 3));
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conf_reg[1] = (conf_reg[1] | (value << 3));
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uint8_t msg[3] = {index[0], conf_reg[0], conf_reg[1]};
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HAL_I2C_Master_Transmit(&AS6221_I2C_HANDLE, (AS6221_ADDRESS << 1), msg, 4, 0xFFFF);
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}
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else{
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value = value & 0x03;
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uint8_t retVal =(conf_reg[1] & 0x18);
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conf_reg[1] = (conf_reg[1] & ~(0x01 << 3));
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conf_reg[1] = (conf_reg[1] | (value << 3));
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uint8_t msg[3] = {index[0], conf_reg[0], conf_reg[1]};
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HAL_I2C_Master_Transmit(&AS6221_I2C_HANDLE, (AS6221_ADDRESS << 1), msg, 4, 0xFFFF);
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return retVal;
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}
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case SS:
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if(rw == R){
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return (conf_reg[1] & 0x01);
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}
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else if(rw == W){
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value = value & 0x01;
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conf_reg[1] = (conf_reg[1] & ~(0x01 << 0));
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conf_reg[1] = (conf_reg[1] | (value << 0));
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uint8_t msg[3] = {index[0], conf_reg[0], conf_reg[1]};
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HAL_I2C_Master_Transmit(&AS6221_I2C_HANDLE, (AS6221_ADDRESS << 1), msg, 4, 0xFFFF);
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}
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else{
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value = value & 0x01;
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uint8_t retVal =(conf_reg[1] & 0x01);
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conf_reg[1] = (conf_reg[1] & ~(0x01 << 0));
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conf_reg[1] = (conf_reg[1] | (value << 0));
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uint8_t msg[3] = {index[0], conf_reg[0], conf_reg[1]};
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HAL_I2C_Master_Transmit(&AS6221_I2C_HANDLE, (AS6221_ADDRESS << 1), msg, 4, 0xFFFF);
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return retVal;
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}
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}
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return 0;
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}
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36
AS6221.h
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36
AS6221.h
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/*
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* AS6221.h
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*
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* Created on: Nov 15, 2021
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* Author: angoosh
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*/
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#ifndef INC_AS6221_H_
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#define INC_AS6221_H_
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#include "stm32l0xx_hal.h"
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#define AS6221_ADDRESS 0x48
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#define LSB (double)0.0078125
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typedef enum {
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AL = 0,
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CR = 1,
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SM = 2,
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IM = 3,
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POL = 4,
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CF = 5,
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SS = 6
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} SETUP_REG;
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typedef enum {
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R = 0,
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W = 1,
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RW = 2
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} ACCESS_OP;
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float AS6221_Read_Temperature();
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int AS6221_Register(SETUP_REG reg, uint8_t value, ACCESS_OP rw);
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#endif /* INC_AS6221_H_ */
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62
SHT40.c
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62
SHT40.c
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/*
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* SHT40.c
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*
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* Created on: Nov 15, 2021
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* Author: angoosh
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*/
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#include "SHT40.h"
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#include "main.h"
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extern I2C_HandleTypeDef STH40_I2C_HANDLE;
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void STH40_Read_Sensor_Data(STH40_COMMANDS command, float *retVal);
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/* @brief Read sensor data of SHT40
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* @param command to send
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* @param returns temperature and humidity
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* @retval float temperature or humidity
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*/
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void STH40_Read_Sensor_Data(STH40_COMMANDS command, float *retVal){
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uint8_t data[1] = {command};
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uint8_t SHT40_data[6];
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if((command != Serial_Number) || (command != Soft_Reset)){
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HAL_I2C_Master_Transmit(&STH40_I2C_HANDLE, (STH40_ADDRESS << 1), data, 2, 0xFFFF);
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if((command == High_Precision) || (command == Medium_Precision) || (command == Low_Precision)){
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HAL_Delay(10);
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}
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else if((command == Heater_200mW_1s) || (command == Heater_110mW_1s) || (command == Heater_20mW_1s)){
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HAL_Delay(1010);
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}
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else{
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HAL_Delay(110);
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}
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HAL_I2C_Master_Receive(&STH40_I2C_HANDLE, (STH40_ADDRESS << 1), SHT40_data, 6, 0xFFFF);
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int t_ticks = SHT40_data[0] * 256 + SHT40_data[1];
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int rh_ticks = SHT40_data[3] * 256 + SHT40_data[4];
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float temp = -45 + 175 * t_ticks/65535;
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float hum = -6 + 125 * rh_ticks/65535;
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if(hum > 100){
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hum = 100;
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}
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if(hum < 0){
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hum = 0;
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}
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retVal[0] = temp;
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retVal[1] = hum;
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}
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else if(command == Serial_Number){
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HAL_I2C_Master_Transmit(&STH40_I2C_HANDLE, (STH40_ADDRESS << 1), data, 2, 0xFFFF);
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HAL_Delay(10);
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HAL_I2C_Master_Receive(&STH40_I2C_HANDLE, (STH40_ADDRESS << 1), SHT40_data, 6, 0xFFFF);
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retVal[0] = SHT40_data[0] * 256 + SHT40_data[1];
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retVal[1] = SHT40_data[3] * 256 + SHT40_data[4];
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}
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else{
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HAL_I2C_Master_Transmit(&STH40_I2C_HANDLE, (STH40_ADDRESS << 1), data, 2, 0xFFFF);
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}
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}
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32
SHT40.h
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32
SHT40.h
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/*
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* SHT40.h
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*
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* Created on: Nov 15, 2021
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* Author: angoosh
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*/
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#ifndef INC_SHT40_H_
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#define INC_SHT40_H_
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#include "stm32l0xx_hal.h"
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#define STH40_ADDRESS 0x44 //pro STH40xx-B is address 0x45
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typedef enum {
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High_Precision = 0xFD,
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Medium_Precision = 0xF6,
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Low_Precision = 0xE0,
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Heater_200mW_1s = 0x39,
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Heater_200mW_100ms = 0x32,
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Heater_110mW_1s = 0x39,
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Heater_110mW_100ms = 0x32,
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Heater_20mW_1s = 0x39,
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Heater_20mW_100ms = 0x32,
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Serial_Number = 0x89,
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Soft_Reset = 0x94
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} STH40_COMMANDS;
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void STH40_Read_Sensor_Data(STH40_COMMANDS command, float *retVal);
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#endif /* INC_SHT40_H_ */
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