#include "newblue_bh1750.h"
I2C_HandleTypeDef *bh1750_i2c; // Handler to I2C interface
bh1750_mode Bh1750_Mode; // Current sensor mode
uint8_t Bh1750_Mtreg; // Current MT register value
void BH1750_Init(I2C_HandleTypeDef *hi2c)
{
bh1750_i2c = hi2c;
BH1750_Reset();
BH1750_SetMtreg(BH1750_DEFAULT_MTREG);
}
//
// Reset all registers to default value.
//
void BH1750_Reset(void)
{
uint8_t tmp = 0x07;
if(HAL_I2C_Master_Transmit_DMA(bh1750_i2c, BH1750_ADDRESS, &tmp, 1)!=HAL_OK )
//if(HAL_I2C_Master_Transmit(bh1750_i2c, BH1750_ADDRESS, &tmp, 1,10)!=HAL_OK )
{
Error_Handler();
}
}
//
// Set the power state.
// 0 - sleep, low power.
// 1 - running.
//
void BH1750_PowerState(uint8_t PowerOn)
{
PowerOn = (PowerOn? 1:0);
if( HAL_I2C_Master_Transmit_DMA(bh1750_i2c, BH1750_ADDRESS, &PowerOn, 1)!=HAL_OK)
//if( HAL_I2C_Master_Transmit(bh1750_i2c, BH1750_ADDRESS, &PowerOn, 1,10)!=HAL_OK)
{ Error_Handler(); }
}
//
// Set the mode of converting. Look into bh1750_mode enum.
//
void BH1750_SetMode(bh1750_mode Mode)
{
if(!((Mode >> 4) || (Mode >> 5))) Error_Handler();
if((Mode & 0x0F) > 3) Error_Handler();
Bh1750_Mode = Mode;
if(HAL_I2C_Master_Transmit_DMA(bh1750_i2c, BH1750_ADDRESS, &Mode, 1)!=HAL_OK )
//if(HAL_I2C_Master_Transmit(bh1750_i2c, BH1750_ADDRESS, &Mode, 1,10)!=HAL_OK )
{ Error_Handler(); }
}
//
// Set the Measurement Time register. It allows to increase or decrease the sensitivity.
//
void BH1750_SetMtreg(uint8_t Mtreg)
{
HAL_StatusTypeDef retCode;
if (Mtreg < 31 || Mtreg > 254) {
Error_Handler();
}
Bh1750_Mtreg = Mtreg;
uint8_t tmp[2];
tmp[0] = (0x40 | (Mtreg >> 5));
tmp[1] = (0x60 | (Mtreg & 0x1F));
retCode = HAL_I2C_Master_Transmit_DMA(bh1750_i2c, BH1750_ADDRESS, &tmp[0], 1);
//retCode = HAL_I2C_Master_Transmit(bh1750_i2c, BH1750_ADDRESS, &tmp[0], 1,10);
if (HAL_OK != retCode) {
Error_Handler();
}
retCode = HAL_I2C_Master_Transmit_DMA(bh1750_i2c, BH1750_ADDRESS, &tmp[0], 1);
//retCode = HAL_I2C_Master_Transmit(bh1750_i2c, BH1750_ADDRESS, &tmp[1], 1,10);
if (HAL_OK == retCode) {
asm("NOP");
}
//Error_Handler();
}
//
// Trigger the conversion in manual modes.
// For low resolution conversion time is typical 16 ms,
// for high resolution 120 ms. You need to wait until read the measurement value.
// There is no need to exit low power mode for manual conversion. It makes automatically.
//
void BH1750_TriggerManualConversion(void)
{
BH1750_SetMode(Bh1750_Mode);
}
//
// Read the converted value and calculate the result.
//
void BH1750_ReadLight(uint_fast32_t *raw)
{
uint_fast32_t result;
uint8_t tmp[2];
if(HAL_I2C_Master_Receive_DMA(bh1750_i2c, BH1750_ADDRESS, tmp, 2)!=HAL_OK)
//if(HAL_I2C_Master_Receive(bh1750_i2c, BH1750_ADDRESS, tmp, 2,10)!=HAL_OK)
{
Error_Handler();
}
result = (tmp[0] << 8) | (tmp[1]);
*raw=result;
}
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
#include "main.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include"newblue_bh1750.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
I2C_HandleTypeDef hi2c1;
DMA_HandleTypeDef hdma_i2c1_rx;
DMA_HandleTypeDef hdma_i2c1_tx;
/* USER CODE BEGIN PV */
uint_fast32_t rawvalue=0;
uint_fast32_t RAWVALUE =0;
volatile uint_fast32_t count=0;
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_I2C1_Init(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_DMA_Init();
MX_I2C1_Init();
/* USER CODE BEGIN 2 */
BH1750_Init(&hi2c1);
BH1750_SetMode(CONTINUOUS_HIGH_RES_MODE_2);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
BH1750_ReadLight(&rawvalue);
RAWVALUE=rawvalue;
HAL_Delay(1000);
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief I2C1 Initialization Function
* @param None
* @retval None
*/
static void MX_I2C1_Init(void)
{
/* USER CODE BEGIN I2C1_Init 0 */
/* USER CODE END I2C1_Init 0 */
/* USER CODE BEGIN I2C1_Init 1 */
/* USER CODE END I2C1_Init 1 */
hi2c1.Instance = I2C1;
hi2c1.Init.ClockSpeed = 100000;
hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2;
hi2c1.Init.OwnAddress1 = 0;
hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
hi2c1.Init.OwnAddress2 = 0;
hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
if (HAL_I2C_Init(&hi2c1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN I2C1_Init 2 */
/* USER CODE END I2C1_Init 2 */
}
/**
* Enable DMA controller clock
*/
static void MX_DMA_Init(void)
{
/* DMA controller clock enable */
__HAL_RCC_DMA1_CLK_ENABLE();
/* DMA interrupt init */
/* DMA1_Channel6_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA1_Channel6_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMA1_Channel6_IRQn);
/* DMA1_Channel7_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA1_Channel7_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMA1_Channel7_IRQn);
}
/**
* @brief GPIO Initialization Function
* @param None
* @retval None
*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_RESET);
/*Configure GPIO pin : PC13 */
GPIO_InitStruct.Pin = GPIO_PIN_13;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
}
/* USER CODE BEGIN 4 */
void HAL_I2C_MasterRxCpltCallback(I2C_HandleTypeDef *hi2c1)
{
/* Toggle LED_GREEN: Transfer in reception process is correct */
HAL_GPIO_TogglePin(GPIOC, GPIO_PIN_13);
count++;
}
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
