STM32F103C8开发紫外线传感器SI1133的使用（七）

SI1133传感器是基于I2C通信的，关于I2C部分请参考：


关于传感器初始化参数的说明：


PARAM_CHAN_LIST:配置通道，从bit0到bit5,分别代表通道0到5，共六个通道，最高两位无效；


PARAM_ADCCONFIGx:半导体功能配置，0x78表示配置成UV紫外线检测,积分时间基数短24.4us，即CFG_RATE_SHORT|CFG_UV，其余见datasheet;
PARAM_ADCSENSx:检测信号范围，最高位置1表示高,可防止结果溢出，低4位表示积分时间；
PARAM_ADCPOSTx:测量结果设置，0x00表示结果为16位模式，0x40表示24位模式；
PARAM_MEASCONFIGx:计数器选择，0x00表示不设置，0x40设置计数器0，0x80设置计数器1，0xc0设置计数器2


PARAM_MEASRATE_H:采样频率设置高位
PARAM_MEASRATE_L:采样频率设置低位


REG_IRQ_ENABLE:开启通道中断


按照SI1133_init()中的设置，积分时间基数为24.4us,积分时间t = 24.4us * 2^0x09 = 12.5ms，采样频率f = 1250Hz/0x09c4 = 0.5Hz；




关于结果：
根据以上配置，传感器检测结果保存在REG_HOSTOUT0-REG_HOSTOUT11中，每个通道占用两个字节，高位在前；
CH0H,CH0L,CH1H,CH1L..............
如设置了24位模式，则结果如下：

CH0H,CH0L,CH1H,CH1M,CH1L........

头文件：

#ifndef __SI1133_H__#define __SI1133_H__#include "tim.h"#include "i2c.h"#define SI1133_PART_ID  0xAA//*******************************************************////*                   ADCCONFIGx                        *////*******************************************************////=========================================================//  measurement rate,Offsets for Parameter Table ADCCONFIGx//=========================================================#define CFG_RATE_SHORT    0X60 //24.4us#define CFG_RATE_NORMAL   0X00 //48.8us#define CFG_RATE_LONG     0X20 //97.6us#define CFG_RATE_VLONG    0X40 //195us//==========================================================// Photodiodos select,Offsets for Parameter Table ADCCONFIGx//==========================================================#define CFG_SMALL_IR   0X00 #define CFG_MEDIUM_IR  0X01#define CFG_LARGE_IR  0X02#define CFG_WHITE     0X0B#define CFG_LARGE_WHITE   0X0C#define CFG_UV    0X18#define CFG_UV_DEEP   0X19//------------------------END------------------------------//*******************************************************////*                   MEASCONFIGx                       *////*******************************************************////===========================// MEASCOUNTER select,Value for Parameter Table MEASCONFIGx//===========================#define MEAS_COUNT_NONE   0X00#define MEAS_COUNT_0   0X40#define MEAS_COUNT_1   0X80#define MEAS_COUNT_2   0XC0//------------------------END------------------------------//*******************************************************////*                      ADCPOSTx                       *////*******************************************************////===========================// OUTPUT setting,Offsets for Parameter Table ADCPOSTx//===========================#define POST_BITS_16  0X00#define POST_BITS_24  0X40//===========================// THRESHOLD setting,Offsets for Parameter Table ADCPOSTx//===========================#define POST_THRESHOLD_NONE  0X00#define POST_THRESHOLD_0  0X01#define POST_THRESHOLD_1  0X02#define POST_THRESHOLD_2  0X03//------------------------END------------------------------//===========================// I2C Registers Address//===========================#define REG_PART_ID               0x00#define REG_REV_ID                0x01#define REG_MFR_ID                0x02#define REG_INFO0               0x03#define REG_INFO1                 0x04#define REG_HOSTIN3               0x07#define REG_HOSTIN2               0x08#define REG_HOSTIN1               0x09#define REG_HOSTIN0               0x0A#define REG_COMMAND               0x0B#define REG_IRQ_ENABLE            0x0F#define REG_RESET                 0x0F#define REG_RESPONSE1             0x10#define REG_RESPONSE0             0x11#define REG_IRQ_STATUS            0x12#define REG_HOSTOUT0              0x13#define REG_HOSTOUT1              0x14#define REG_HOSTOUT2              0x15#define REG_HOSTOUT3              0x16#define REG_HOSTOUT4              0x17#define REG_HOSTOUT5              0x18#define REG_HOSTOUT6              0x19#define REG_HOSTOUT7              0x1A#define REG_HOSTOUT8              0x1B#define REG_HOSTOUT9              0x1C#define REG_HOSTOUT10             0x1D#define REG_HOSTOUT11             0x1E#define REG_HOSTOUT12             0x1F#define REG_HOSTOUT13             0x20#define REG_HOSTOUT14             0x21#define REG_HOSTOUT15             0x22#define REG_HOSTOUT16             0x23#define REG_HOSTOUT17             0x24#define REG_HOSTOUT18             0x25#define REG_HOSTOUT19             0x26#define REG_HOSTOUT20             0x27#define REG_HOSTOUT21             0x28#define REG_HOSTOUT22             0x29#define REG_HOSTOUT23             0x2A#define REG_HOSTOUT24             0x2B#define REG_HOSTOUT25             0x2C//============================================================// Parameter Table Offsets//============================================================#define PARAM_I2C_ADDR            0x00#define PARAM_CHAN_LIST           0x01#define PARAM_ADCCONFIG0          0x02#define PARAM_ADCSENS0            0x03#define PARAM_ADCPOST0            0x04#define PARAM_MEASCONFIG0         0x05#define PARAM_ADCCONFIG1          0x06#define PARAM_ADCSENS1            0x07#define PARAM_ADCPOST1            0x08#define PARAM_MEASCONFIG1         0x09#define PARAM_ADCCONFIG2          0x0A#define PARAM_ADCSENS2            0x0B#define PARAM_ADCPOST2            0x0C#define PARAM_MEASCONFIG2         0x0D#define PARAM_ADCCONFIG3          0x0E#define PARAM_ADCSENS3            0x0F#define PARAM_ADCPOST3            0x10#define PARAM_MEASCONFIG3         0x11#define PARAM_ADCCONFIG4          0x12#define PARAM_ADCSENS4            0x13#define PARAM_ADCPOST4            0x14#define PARAM_MEASCONFIG4         0x15#define PARAM_ADCCONFIG5          0x16#define PARAM_ADCSENS5            0x17#define PARAM_ADCPOST5            0x18#define PARAM_MEASCONFIG5         0x19#define PARAM_MEASRATE_H          0x1A#define PARAM_MEASRATE_L          0x1B#define PARAM_MEASCOUNT0          0x1C#define PARAM_MEASCOUNT1          0x1D#define PARAM_MEASCOUNT2          0x1E#define PARAM_LED1_A          0x1F#define PARAM_LED1_B          0x20#define PARAM_LED2_A          0x21#define PARAM_LED2_B          0x22#define PARAM_LED3_A          0x23#define PARAM_LED3_B          0x24#define PARAM_THRESHOLD0_H    0x25#define PARAM_THRESHOLD0_L    0x26#define PARAM_THRESHOLD1_H    0x27#define PARAM_THRESHOLD1_L    0x28#define PARAM_THRESHOLD2_H    0x29#define PARAM_THRESHOLD2_L    0x2A#define PARAM_BURST           0x2B//==================================================================//COMMAND Register Value//==================================================================#define CMD_RESET_CTR  0x00#define CMD_RESET_SW  0x01#define CMD_FORCE  0x11#define CMD_PAUSE  0x12#define CMD_START  0x13#define CMD_WRITE  0x80#define CMD_READ  0x40/******************************************************************************* *******    Si115x Register and Parameter Bit Definitions  ********************* ******************************************************************************/#define RSP0_CHIPSTAT_MASK      0xe0#define RSP0_COUNTER_MASK       0x1f#define RSP0_SLEEP              0x20extern int16_t SI1133_ReadRegister(uint8_t addr);extern int16_t SI1133_WriteRegister(uint8_t addr, uint8_t data);extern int16_t SI1133_ReadParameter(uint8_t addr);extern int16_t SI1133_WriteParameter(uint8_t addr, uint8_t data);extern int16_t SI1133_Init(void);extern int16_t SI1133_NOP(void);extern int16_t SI1133_Force(void);extern int16_t SI1133_Start (void);extern int16_t SI1133_Pause(void);#endif

驱动：

#include "si1133.h"int16_t SI1133_ReadRegister(uint8_t addr){uint8_t x;I2C_ReadByte(SI1133_PART_ID, addr, &x);return x;}int16_t SI1133_WriteRegister(uint8_t addr, uint8_t data){I2C_WriteByte(SI1133_PART_ID, addr, &data);return 0;}static int16_t SI1133_WriteBlock(uint8_t addr, uint8_t* p_data, uint16_t len){I2C_WriteBlock(SI1133_PART_ID, addr, p_data, len);return 0;}static int16_t SI1133_ReadBlock(uint8_t addr, uint8_t* p_data, uint16_t len){I2C_ReadBlock(SI1133_PART_ID, addr, p_data, len);return 0;}static int16_t WaitUntilSleep(void){int16_t retval = -1;uint8_t count = 0;while (count < 5){retval = SI1133_ReadRegister(REG_RESPONSE0);if ((retval & RSP0_CHIPSTAT_MASK) == RSP0_SLEEP)   break;if (retval <  0)   return retval;count++;}return 0;}static int16_t SI1133_SendCMD(uint8_t command){int16_t  response, retval;uint8_t  count = 0;response = SI1133_ReadRegister(REG_RESPONSE0);if (response < 0) return response;response = response & RSP0_COUNTER_MASK;for (count = 0 ; count < 5; count++){if ((retval = WaitUntilSleep()) != 0) return retval;if (command == 0) break;retval = SI1133_ReadRegister(REG_RESPONSE0);if ((retval & RSP0_COUNTER_MASK) == response) break;else if (retval < 0) return retval;elseresponse = retval & RSP0_COUNTER_MASK;}if ((retval = (SI1133_WriteRegister(REG_COMMAND, command)) != 0)){return retval;}for (count = 0 ; count < 5; count++){if (command == 0)  break;retval = SI1133_ReadRegister(REG_RESPONSE0);if ((retval & RSP0_COUNTER_MASK) != response) break;else if (retval < 0) return retval;}return 0;}int16_t SI1133_ReadParameter(uint8_t addr){int16_t retval;retval = SI1133_SendCMD(CMD_READ | (addr & 0x3F));if ( retval != 0 )    return retval;retval = SI1133_ReadRegister(REG_RESPONSE1);return retval;}int16_t SI1133_WriteParameter(uint8_t addr, uint8_t data){uint8_t buffer[2];int16_t retval, response_stored, response;buffer[0] = data; buffer[1] = CMD_WRITE | (addr & 0x3F);if ((retval = WaitUntilSleep()) != 0)    return retval;response_stored = RSP0_COUNTER_MASK & SI1133_ReadRegister(REG_RESPONSE0);retval = SI1133_WriteBlock(REG_HOSTIN0, (uint8_t *)buffer, 2);if (retval != 0)  return retval;response = SI1133_ReadRegister(REG_RESPONSE0);while ((response & RSP0_COUNTER_MASK) == response_stored){response = SI1133_ReadRegister(REG_RESPONSE0);}if (retval < 0)   return retval;else   return 0;}static int16_t SI1133_Reset(void){int16_t retval = 0;Delay_ms(10);Delay_ms(10);Delay_ms(10);retval += SI1133_WriteRegister(REG_COMMAND, CMD_RESET_SW);Delay_ms(10);return retval;}int16_t SI1133_NOP(void){return SI1133_SendCMD(CMD_RESET_CTR);}int16_t SI1133_Force(void){return SI1133_SendCMD(CMD_FORCE);}int16_t SI1133_Start (void){return SI1133_SendCMD(CMD_START);}int16_t SI1133_Pause(void){uint8_t countA, countB;int8_t  retval = 0;while ((RSP0_CHIPSTAT_MASK & retval) != RSP0_SLEEP){retval = SI1133_ReadRegister(REG_RESPONSE0);}countA = 0;while (countA < 5){countB = 0;while (countB < 5){retval = SI1133_ReadRegister(REG_RESPONSE0);if ((retval & RSP0_COUNTER_MASK) == 0)     break;else{SI1133_WriteRegister(REG_COMMAND, 0x00);}countB++;}SI1133_SendCMD(CMD_PAUSE);countB = 0;while (countB < 5){retval = SI1133_ReadRegister(REG_RESPONSE0);if ((retval & RSP0_COUNTER_MASK) != 0)        break;countB++;}retval = SI1133_ReadRegister(REG_RESPONSE0);if ((retval & RSP0_COUNTER_MASK) == 1 )      break;countA++;}return 0;}int16_t SI1133_Init(void){int16_t    retval;retval  = SI1133_Reset();Delay_ms(10);retval += SI1133_WriteParameter( PARAM_CHAN_LIST, 0x3f);//UVretval += SI1133_WriteParameter( PARAM_ADCCONFIG0, 0x78);retval += SI1133_WriteParameter( PARAM_ADCSENS0, 0x89);retval += SI1133_WriteParameter( PARAM_ADCPOST0, 0x00);retval += SI1133_WriteParameter( PARAM_MEASCONFIG0, 0x40);//retval += SI1133_WriteParameter( PARAM_ADCCONFIG1, 0x6d);retval += SI1133_WriteParameter( PARAM_ADCSENS1, 0x89);retval += SI1133_WriteParameter( PARAM_ADCPOST1, 0x00);retval += SI1133_WriteParameter( PARAM_MEASCONFIG1, 0x40);retval += SI1133_WriteParameter( PARAM_ADCCONFIG2, 0x6b);retval += SI1133_WriteParameter( PARAM_ADCSENS2, 0x89);retval += SI1133_WriteParameter( PARAM_ADCPOST2, 0x00);retval += SI1133_WriteParameter( PARAM_MEASCONFIG2, 0x40);retval += SI1133_WriteParameter( PARAM_ADCCONFIG3, 0x61);retval += SI1133_WriteParameter( PARAM_ADCSENS3, 0x89);retval += SI1133_WriteParameter( PARAM_ADCPOST3, 0x00);retval += SI1133_WriteParameter( PARAM_MEASCONFIG3, 0x40);retval += SI1133_WriteParameter( PARAM_ADCCONFIG4, 0x60);retval += SI1133_WriteParameter( PARAM_ADCSENS4, 0x89);retval += SI1133_WriteParameter( PARAM_ADCPOST4, 0x00);retval += SI1133_WriteParameter( PARAM_MEASCONFIG4, 0x40);retval += SI1133_WriteParameter( PARAM_ADCCONFIG5, 0x79);retval += SI1133_WriteParameter( PARAM_ADCSENS5, 0x89);retval += SI1133_WriteParameter( PARAM_ADCPOST5, 0x00);retval += SI1133_WriteParameter( PARAM_MEASCONFIG5, 0x40);retval += SI1133_WriteParameter( PARAM_MEASRATE_H, 0x09);retval += SI1133_WriteParameter( PARAM_MEASRATE_L, 0xc4);retval += SI1133_WriteRegister(  REG_IRQ_ENABLE, 0x3f);retval += SI1133_Start();return retval;}