VCNL4040 STM32的驱动程序

以下是VCNL4040的STM32驱动程序示例，供您参考：

#include "vcnl4040.h"
#include "i2c.h"

#define VCNL4040_ADDRESS   0x13

#define VCNL4040_REG_COMMAND    0x80
#define VCNL4040_REG_PRODUCT_ID 0x81
#define VCNL4040_REG_PROX_RATE  0x82
#define VCNL4040_REG_LED_CURRENT    0x83
#define VCNL4040_REG_AMBI_PARAMETER 0x84
#define VCNL4040_REG_AMBI_VALUE_H   0x85
#define VCNL4040_REG_AMBI_VALUE_L   0x86
#define VCNL4040_REG_PROX_VALUE_H   0x87
#define VCNL4040_REG_PROX_VALUE_L   0x88
#define VCNL4040_REG_INT_FLAG   0x89
#define VCNL4040_REG_LOW_TH_H   0x8A
#define VCNL4040_REG_LOW_TH_L   0x8B
#define VCNL4040_REG_HIGH_TH_H  0x8C
#define VCNL4040_REG_HIGH_TH_L  0x8D
#define VCNL4040_REG_PROX_TIMING    0x8E
#define VCNL4040_REG_PROX_INTEGRATION_TIME_H  0x8F
#define VCNL4040_REG_PROX_INTEGRATION_TIME_L  0x90

HAL_StatusTypeDef VCNL4040_WriteReg(uint8_t reg, uint8_t *pbuf, uint16_t len)
{
    return HAL_I2C_Mem_Write(&hi2c1, VCNL4040_ADDRESS << 1, reg, 1, pbuf, len, 1000);
}

HAL_StatusTypeDef VCNL4040_ReadReg(uint8_t reg, uint8_t *pbuf, uint16_t len)
{
    return HAL_I2C_Mem_Read(&hi2c1, VCNL4040_ADDRESS << 1, reg, 1, pbuf, len, 1000);
}

HAL_StatusTypeDef VCNL4040_Init()
{
    HAL_StatusTypeDef status;
    uint8_t command = 0x03; // enable proximity and ambient light measurement

    status = VCNL4040_WriteReg(VCNL4040_REG_COMMAND, &command, 1);
    if (status != HAL_OK) return status;

    return HAL_OK;
}

uint16_t VCNL4040_ReadProximity()
{
    uint8_t buf[2];
    uint16_t proximity;

    VCNL4040_ReadReg(VCNL4040_REG_PROX_VALUE_H, buf, 2);

    proximity = buf[0] << 8 | buf[1];

    return proximity;
}

uint16_t VCNL4040_ReadAmbientLight()
{
    uint8_t buf[2];
    uint16_t ambient_light;

    VCNL4040_ReadReg(VCNL4040_REG_AMBI_VALUE_H, buf, 2);

    ambient_light = buf[0] << 8 | buf[1];

    return ambient_light;
}

此示例中，我们使用STM32的I2C模块与VCNL4040进行通信，实现了初始化、读取近距离光感和环境光感的功能。使用时，您需要根据实际需求修改函数中的参数和寄存器地址。