光感VEML6030,I2C驱动及示例

#include "VEML6030.h" #include "PUBLIC.h" #include "delay.h" unsigned char GG_LSB=0; unsigned char GG_MSB=0; unsigned char VMEL6030_First=0; unsigned char VMEL6030_Broke_Flag=0; unsigned char VMEL6030_StopInterrupt_Flag=0; unsigned char VEML6030_FalseTrigger_Flag=0; uint16_t VEML6030_SUM=0; double ALS_Alarm_lux[3]; double Communication_ALS_Alarm_lux=0; unsigned char Communication_ALS_Read_lux=0; uint8_t Int_TH_Low_Flag; uint8_t INT_TH_High_Flag; uint8_t ALS_Light_Flag; uint8_t ALS_Dark_Flag; uint8_t ALS_Light_Count=0; uint8_t ALS_Dark_Count=0; ALS_State Current_ALS_State; uint8_t Last_ALS_Light_State=0; uint16_t cmd[4]={VEML6030_ALS_CONF_DEFAULT | VEML6030_ALS_CONF_PERS_4 | VEML6030_ALS_CONF_IT_200MS | VEML6030_ALS_CONF_SM_x2, 315, 285, 0}; double lux; double luxlasttime; const float calibration_factor = 0.0144; void WRITE_VEML6030(u8 command,u8 LSB,u8 MSB) { I2C_Start(); I2C_Send_Byte(0x90);// I2C_Wait_Ack(); I2C_Send_Byte(command);// I2C_Wait_Ack(); I2C_Send_Byte(LSB);// I2C_Wait_Ack(); I2C_Send_Byte(MSB);// I2C_Wait_Ack(); I2C_Stop(); delay_ms(110); } void READ_VEML6030_OUTPUT(u8 command) { I2C_Start(); I2C_Send_Byte(0x90);// I2C_Wait_Ack(); I2C_Send_Byte(command);// I2C_Wait_Ack(); I2C_Start(); I2C_Send_Byte(0x91);// I2C_Wait_Ack(); GG_LSB=I2C_Read_Byte(1); GG_MSB=I2C_Read_Byte(0); I2C_Stop(); } void Initialize_VEML6030(void) { Disable_Sensor();//失能器件 IWDG_Feed(); SET_Interrupt_Threshold(ALS_Alarm_Low_Threshold,ALS_Alarm_High_Threshold);//设置低阈值，高阈值 IWDG_Feed(); Enable_Interrupt();//使能中断 IWDG_Feed(); Set_PSM_Modle();//设置CMD03为连续采集模式 IWDG_Feed(); Enable_Sensor();//配置ALS GainX2，积分时间200ms，ALS_PERS 4次采集，ALS_INT_EN使能，ALS_SD打开器件 delay_ms(250); IWDG_Feed(); } void Set_PSM_Modle(void) { uint8_t data[2]; cmd[ALS_PSM] |= VEML6030_ALS_PSM_MODLE; data[0] = (uint8_t)(cmd[ALS_PSM]&0xFF); //获取16位数据的低8位 data[1] = (uint8_t)((cmd[ALS_PSM]&0xFF00)>>8); //获取16位数据的低8位 WRITE_VEML6030(ALS_PSM,data[0],data[1]); } void Clear_Interrupt(void) { READ_VEML6030_OUTPUT(ALS_STATUS); //读取0x06，以清除中断 INT_TH_High_Flag = GG_MSB & 0x40; //判断是否是高阈值置位 Int_TH_Low_Flag = GG_MSB & 0x80; //判断是否是低阈值置位 } void Enable_Sensor(void) { uint8_t data[2]; //data[0]存放命令的低8位，data[1]存放命令的高8位 cmd[ALS_CONF] &= ~VEML6030_ALS_CONF_SD; data[0] = (uint8_t)(cmd[ALS_CONF]&0xFF); //获取16位数据的低8位 data[1] = (uint8_t)((cmd[ALS_CONF]&0xFF00)>>8); //获取16位数据的低8位 WRITE_VEML6030(ALS_CONF,data[0],data[1]); } void Disable_Sensor(void) { uint8_t data[2]; //data[0]存放命令的低8位，data[1]存放命令的高8位 cmd[ALS_CONF] |= VEML6030_ALS_CONF_SD; data[0] = (uint8_t)(cmd[ALS_CONF]&0xFF); //获取16位数据的低8位 data[1] = (uint8_t)((cmd[ALS_CONF]&0xFF00)>>8); //获取16位数据的低8位 WRITE_VEML6030(ALS_CONF,data[0],data[1]); } void Enable_Interrupt(void) { uint8_t data[2]; //data[0]存放命令的低8位，data[1]存放命令的高8位 cmd[ALS_CONF] |= VEML6030_ALS_CONF_INT_EN; data[0] = (uint8_t)(cmd[ALS_CONF]&0xFF); //获取16位数据的低8位 data[1] = (uint8_t)((cmd[ALS_CONF]&0xFF00)>>8); //获取16位数据的低8位 WRITE_VEML6030(ALS_CONF,data[0],data[1]); } void Disable_Interrupt(void) { uint8_t data[2]; //data[0]存放命令的低8位，data[1]存放命令的高8位 cmd[ALS_CONF] &= ~VEML6030_ALS_CONF_INT_EN; data[0] = (uint8_t)(cmd[ALS_CONF]&0xFF); //获取16位数据的低8位 data[1] = (uint8_t)((cmd[ALS_CONF]&0xFF00)>>8); //获取16位数据的低8位 WRITE_VEML6030(ALS_CONF,data[0],data[1]); } void SET_Interrupt_Threshold(uint16_t min,uint16_t max) { uint8_t Hdata[2]; //data[0]存放命令的低8位，data[1]存放命令的高8位 uint8_t Ldata[2]; uint16_t HighThreshold; uint16_t LowThreshold; // Set ALS high threshold HighThreshold = max; if(HighThreshold > 65535) HighThreshold = 65535; Hdata[0] = (uint8_t)(HighThreshold & 0xFF); //获取16位数据的低8位 Hdata[1] = (uint8_t)((HighThreshold & 0xFF00)>>8); //获取16位数据的高8位 WRITE_VEML6030(ALS_THDH,Hdata[0],Hdata[1]); // Set ALS low threshold LowThreshold = min; if(LowThreshold <= 0) LowThreshold = 0; Ldata[0] = (uint8_t)(LowThreshold & 0xFF); //获取16位数据的低8位 Ldata[1] = (uint8_t)((LowThreshold & 0xFF00)>>8); //获取16位数据的高8位 WRITE_VEML6030(ALS_THDL,Ldata[0],Ldata[1]); } void Read_als_data(void) { READ_VEML6030_OUTPUT(ALS_DATA); //读取0x04，获取ALS OUTPUT的值，此值需要计算才对应Lux； } /************************************************************************************** * 计算lux，将读到的低8位数据和高8位数据组合成16位数据，并将16位数据转换成十进制数据 * 并根据初始值设置计算出lux * * **************************************************************************************/ double calculateLux(void) { uint16_t total_num; uint8_t lowsb = GG_LSB; uint8_t highsb = GG_MSB; uint8_t num3,num2,num1,num0; uint16_t sum; total_num = (highsb<<8 | lowsb); num0 = total_num&0xF; num1 = (total_num>>4)&0xF; num2 = (total_num>>8)&0xF; num3 = (total_num>>12)&0xF; sum = num0*1+num1*16+num2*16*16+num3*16*16*16; VEML6030_SUM=sum; lux = sum*calibration_factor; return lux; }