STM32芯片HAL库读取LTR303例程
时间: 2023-06-30 16:11:02 浏览: 99
以下是一个使用STM32芯片HAL库读取LTR303的简单例程,仅供参考:
```c
#include "main.h"
#include "stdio.h"
#define LTR303_ADDR (0x29 << 1) // LTR303驱动的I2C地址
I2C_HandleTypeDef hi2c1; // I2C句柄
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_I2C1_Init(void);
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_I2C1_Init();
uint8_t data[2];
uint16_t result;
// 配置LTR303驱动
data[0] = 0x00; // 配置寄存器地址
data[1] = 0x0F; // 配置寄存器值(连续模式,16位精度,等待时间100ms)
HAL_I2C_Master_Transmit(&hi2c1, LTR303_ADDR, data, 2, 100);
while (1)
{
// 读取光照度数据
data[0] = 0x88; // 光照度数据寄存器地址
HAL_I2C_Master_Transmit(&hi2c1, LTR303_ADDR, data, 1, 100);
HAL_I2C_Master_Receive(&hi2c1, LTR303_ADDR, data, 2, 100);
result = ((uint16_t)data[1] << 8) | data[0]; // 将数据转换为16位整数
printf("Light intensity: %d\n", result); // 打印光照度数据
HAL_Delay(1000); // 1秒延时
}
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Configure the main internal regulator output voltage
*/
__HAL_RCC_PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
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_HSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
Error_Handler();
}
}
static void MX_I2C1_Init(void)
{
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();
}
}
void Error_Handler(void)
{
__disable_irq();
while (1)
{
}
}
```
这个例程使用I2C接口读取LTR303驱动的光照度数据,并将其转换为16位整数。在主循环中,它每秒钟读取一次光照度数据,并通过串口打印输出。需要注意的是,这个例程仅供参考,具体的实现细节会因芯片型号和LTR303驱动的具体规格而有所不同。你需要参考相关的文档和示例代码来进行具体的实现。
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