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HC32F005C6PA 硬件I2C采集ADS1115，亲测可用

游戏城市 • 2022-12-14 • 随笔 • 阅读 32

HC32F005C6PA 硬件I2C采集ADS1115，亲测可用,第1张

HC32F005C6PA 硬件I2C采集ADS1115，亲测可用

HC32时钟为22.15MHz，继而I2C传输速率如果为100k的话，根据公式

在这里将stcI2cCfg.u8Tm设置为 0x10。

I2C端口定义       SDA -> P25     SCL -> P26

ADS1115写地址可选择0x90，0x92，在这里选择了0x92

废话不多说，先上代码

【ADS1115.c】

#include "ads1115.h"
#include "usartApp.h"
#include "i2c.h"

#define GPIO_I2C_SDA_PORT   2
#define GPIO_I2C_SDA_PIN	  5

#define GPIO_I2C_SCL_PORT   2
#define GPIO_I2C_SCL_PIN	  6



void I2C_init(void)
{
	stc_i2c_config_t stcI2cCfg;
	DDL_ZERO_STRUCT(stcI2cCfg);

	Gpio_InitIOExt(GPIO_I2C_SDA_PORT,GPIO_I2C_SDA_PIN,GpioDirOut,FALSE,FALSE,TRUE,FALSE);
	Gpio_InitIOExt(GPIO_I2C_SCL_PORT,GPIO_I2C_SCL_PIN,GpioDirOut,FALSE,FALSE,TRUE,FALSE);

	Gpio_SetFunc_I2CDAT_P25();
	Gpio_SetFunc_I2CCLK_P26();
	Clk_SetPeripheralGate(ClkPeripheralI2c,TRUE);

	stcI2cCfg.enFunc = I2cBaud_En;
	stcI2cCfg.u8Tm = I2C_DRATE;
	stcI2cCfg.pfnI2cCb = NULL;
	stcI2cCfg.bTouchNvic = FALSE;

	I2C_DeInit();
	I2C_Init(&stcI2cCfg);
	I2C_SetFunc(I2cMode_En);
}


en_result_t I2C_MasterSendStart(uint8_t u8DevAddr, uint8_t channel)
{
	int timeout = 0;
	
	
  I2C_SetFunc(I2cStart_En);  // Step5, 发送 Start 信号
	I2C_ClearIrq();

	timeout = TOUTVAL;
	while(0 == I2C_GetIrq() || timeout--);
	
	if(0x08 != I2C_GetState()) {return Error;}

	
	I2C_WriteByte(u8DevAddr);  // Step 10-1
	I2C_ClearFunc(I2cStart_En);  // Step 10-2
	I2C_ClearIrq();  // Step 10-3  M0P_I2C->CR_f.SI = 0;
	timeout = TOUTVAL;
	while(0 == I2C_GetIrq() || timeout--); // Step 11, 等待 I2Cx_CR.si 变为 1，SLA+W 已发送到总线上
	if(0x18 != I2C_GetState()) return Error;

	
	do{
		I2C_WriteByte(CONF_REG);  // Step 13-1
		I2C_ClearIrq();  // Step 13-2    I2Cx_CR.si = 0
  	timeout = TOUTVAL;
		while(0 == I2C_GetIrq() || timeout--);  // Step 14, 等待 I2Cx_CR.si 变为 1，数据已发送到总线上
	}while(0x28 != I2C_GetState());	

	
	do{
		I2C_WriteByte(channel);  // Step 13-1
		I2C_ClearIrq();  // Step 13-2
  	timeout = TOUTVAL;
		while(0 == I2C_GetIrq() || timeout--);  // Step 14, 等待 I2Cx_CR.si 变为 1，数据已发送到总线上
	}while(0x28 != I2C_GetState());

	
	do{
		I2C_WriteByte(0xe3);  // Step 13-1
		I2C_ClearIrq();  // Step 13-2
  	timeout = TOUTVAL;
		while(0 == I2C_GetIrq() || timeout--);  // Step 14, 等待 I2Cx_CR.si 变为 1，数据已发送到总线上
	}while(0x28 != I2C_GetState());

	
	I2C_ClearIrq();  // Step 15-2   I2Cx_CR.si = 0	
  I2C_SetFunc(I2cStop_En);  // Step 15-1  I2Cx_CR.sto = 1
	I2C_ClearIrq();  // Step 15-2   I2Cx_CR.si = 0
  timeout = TOUTVAL;
	while(0 == I2C_GetIrq() || timeout--);  // Step 16, 等待 I2Cx_CR.si 变为 1，数据已发送到总线上

	return Ok;
}


uint32_t ADCDataProcess(uint16_t ADC_Readbuff_i[])
{
  uint32_t adc_rawdata_o;
	adc_rawdata_o = (ADC_Readbuff_i[0] << 8) + ADC_Readbuff_i[1];
	if(adc_rawdata_o >= 0x8000)  
		 adc_rawdata_o = ((0xffff - adc_rawdata_o) / 32767.0) * ADS1115_PGA_6144;
	else
		 adc_rawdata_o = (adc_rawdata_o/32768.0)*ADS1115_PGA_6144;

	return adc_rawdata_o;
}


en_result_t I2C_Read(uint8_t u8DevAddr, uint8_t Reg, uint16_t Readbuff[])
{
	int timeout = 0;
	
	
  I2C_SetFunc(I2cStart_En);  // Step5, 发送 Start 信号
	I2C_ClearIrq();
  timeout = TOUTVAL;
	while(0 == I2C_GetIrq() || timeout--);
	if(0x08 != I2C_GetState()) return Error;

	
	I2C_WriteByte(u8DevAddr);  // Step 10-1
	I2C_ClearFunc(I2cStart_En);  // Step 10-2
	I2C_ClearIrq();  // Step 10-3  M0P_I2C->CR_f.SI = 0;
  timeout = TOUTVAL;
	while(0 == I2C_GetIrq() || timeout--);  // Step 11, 等待 I2Cx_CR.si 变为 1，SLA+W 已发送到总线上
	if(0x18 != I2C_GetState()) return Error;

	
	do{
		I2C_WriteByte(DATA_REG);  // Step 13-1
		I2C_ClearIrq();  // Step 13-2    I2Cx_CR.si = 0
    timeout = TOUTVAL;
		while(0 == I2C_GetIrq() || timeout--);  // Step 14, 等待 I2Cx_CR.si 变为 1，数据已发送到总线上
	}while(0x28 != I2C_GetState());	

	
	I2C_ClearIrq();  // Step 15-2   I2Cx_CR.si = 0	
  I2C_SetFunc(I2cStop_En);  // Step 15-1  I2Cx_CR.sto = 1
	I2C_ClearIrq();  // Step 15-2   I2Cx_CR.si = 0
  timeout = TOUTVAL;
	while(0 == I2C_GetIrq() || timeout--);  // Step 16, 等待 I2Cx_CR.si 变为 1，数据已发送到总线上

	
  I2C_SetFunc(I2cStart_En);  // Step5, 发送 Start 信号
	I2C_ClearIrq();
  timeout = TOUTVAL;
	while(0 == I2C_GetIrq() || timeout--);
	if(0x08 != I2C_GetState()) return Error;

	
	I2C_WriteByte(Reg);  // Step 8-1
	I2C_ClearFunc(I2cStart_En);  // Step 8-2  CR_f.STA = 0;
	I2C_ClearIrq();  // Step 8-3 CR_f.SI = 0;
  timeout = TOUTVAL;
	while(0 == I2C_GetIrq() || timeout--);  // Step 9, 等待 I2Cx_CR.si 变为 1，SLA+W 已发送到总线上
	if(0x40 != I2C_GetState()) return Error;		

	I2C_SetFunc(I2cAck_En);  // CR_f.AA = 1;
	
	I2C_ClearIrq();  // 设置 I2Cx_CR.si 为 0
  timeout = TOUTVAL;
	while(0 == I2C_GetIrq() || timeout--);
	Readbuff[0] = I2C_ReadByte();
	if((0x50 != I2C_GetState())) return Error;

  I2C_ClearIrq();  // 设置 I2Cx_CR.si 为 0
  timeout = TOUTVAL;
	while(0 == I2C_GetIrq() || timeout--);
	Readbuff[1] = I2C_ReadByte();
	if((0x50 != I2C_GetState())) return Error;
	I2C_ClearFunc(I2cAck_En);

	
	I2C_ClearIrq();
  I2C_SetFunc(I2cStop_En);
	I2C_ClearIrq();  // 设置 I2Cx_CR.si 为 0
  timeout = TOUTVAL;
	while(0 == I2C_GetIrq() || timeout--);  // Step 9, 等待 I2Cx_CR.si 变为 1
	
	return Ok;
}


en_result_t ADS1115Read(uint8_t u8DevAddr, uint8_t Reg, uint32_t *adc_rawdata)
{
  uint16_t ADC_Readbuff[2];
	
	if(I2C_Read(u8DevAddr, Reg, ADC_Readbuff) != Ok){return Error;}  //芯片读取数据
	*adc_rawdata = ADCDataProcess(ADC_Readbuff);  //数据处理
	return Ok;
}


uint32_t Getonevalue(uint8_t chip, uint32_t channel)
{
  uint32_t ADC_data;

	if(chip == CHIP1){
		switch(channel)
		{
			case CHANNEL0:
				I2C_MasterSendStart(WR_REG1, AD_CH0);
				ADS1115Read(WR_REG1, RE_REG1, &ADC_data);
			break;
		
			case CHANNEL1:
				I2C_MasterSendStart(WR_REG1, AD_CH1);
				ADS1115Read(WR_REG1, RE_REG1, &ADC_data);
			break;
			
			case CHANNEL2:
				I2C_MasterSendStart(WR_REG1, AD_CH2);
				ADS1115Read(WR_REG1, RE_REG1, &ADC_data);
			break;
			
			case CHANNEL3:
				I2C_MasterSendStart(WR_REG1, AD_CH3);
				ADS1115Read(WR_REG1, RE_REG1, &ADC_data);
			break;
		}
	
	}
	else if(chip == CHIP2)
	{
		switch(channel)
		{
			case CHANNEL0:
				I2C_MasterSendStart(WR_REG2, AD_CH0);
				ADS1115Read(WR_REG2, RE_REG2, &ADC_data);
			break;
		
			case CHANNEL1:
				I2C_MasterSendStart(WR_REG2, AD_CH1);
				ADS1115Read(WR_REG2, RE_REG2, &ADC_data);
			break;
			
			case CHANNEL2:
				I2C_MasterSendStart(WR_REG2, AD_CH2);
				ADS1115Read(WR_REG2, RE_REG2, &ADC_data);
			break;
			
			case CHANNEL3:
				I2C_MasterSendStart(WR_REG2, AD_CH3);
				ADS1115Read(WR_REG2, RE_REG2, &ADC_data);
			break;
		}
	}
	
	return ADC_data;
}


uint32_t GetAdcValue(uint8_t chip, uint32_t channel)
{
	uint32_t adcvalue;
	int i = 0, sum = 0;
	
	for(i = 0; i < AVGTIMES; i++){
	  adcvalue = Getonevalue(chip, channel);
		sum = sum + adcvalue;
	}
	adcvalue = sum / AVGTIMES;
	
	return adcvalue;
}

【ADS1115.h】

#ifndef __ADS1115_H
#define __ADS1115_H

#include "hc32l110.h"
#include "base_types.h"

#define  I2C_DRATE 0x10    
#define  TOUTVAL   100     
#define  AVGTIMES  5


#define  CHIP1 0x01      
#define  CHIP2 0x02      

#define  CHANNEL0 0x00      
#define  CHANNEL1 0x01      
#define  CHANNEL2 0x02      
#define  CHANNEL3 0x03      



#define  WR_REG1 0x90      
#define  RE_REG1 0x91      
#define  WR_REG2 0x92      
#define  RE_REG2 0x93      

#define  DATA_REG  0x00		
#define  CONF_REG  0x01   
#define  LOTH_REG  0x02		
#define  HITH_REG  0x03		


#define  AD_CH0  0xC0   
#define  AD_CH1  0xD0   
#define  AD_CH2  0xE0   
#define  AD_CH3  0xF0   

#define ADS1115_PGA_6144  6144		//FS=6.144V
#define ADS1115_PGA_4096  4096		//FS=4.096V
#define ADS1115_PGA_2048  2048		//FS=2.048V
#define ADS1115_PGA_1024  1024		//FS=1.024V
#define ADS1115_PGA_0512  512		//FS=0.512V
#define ADS1115_PGA_0256  256		//FS=0.256V

uint32_t GetAdcValue(uint8_t chip, uint32_t channel);
uint32_t AvgFilter(uint32_t adcvalue);
uint32_t ADCDataProcess(uint16_t ADC_Readbuff_i[]);
uint32_t Getonevalue(uint8_t chip, uint32_t channel);
en_result_t I2C_MasterSendStart(uint8_t u8DevAddr, uint8_t channel);
en_result_t I2C_Read(uint8_t u8DevAddr, uint8_t Reg, uint16_t Readbuff[]);
en_result_t ADS1115Read(uint8_t u8DevAddr, uint8_t Reg, uint32_t *adc_rawdata);
void I2C_init(void);


#endif

这里ADS1115的ADDR管脚接高电平，所以写地址为0x92，已经封装好。如ADDR管脚接低电平，则将   GetAdcValue(CHIP2, CHANNEL2);    中CHIP2改成CHIP1即可

最后附上完整代码链接

BigHero47/HC32F005-ADS1115: HC32F005C6PA ADS1115 (github.com)https://github.com/BigHero47/HC32F005-ADS1115

欢迎分享，转载请注明来源：内存溢出

原文地址: http://outofmemory.cn/zaji/5580113.html

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