251 lines
6.0 KiB
C
251 lines
6.0 KiB
C
#include "ads1220.h"
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#include "provalctrl.h"
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int ads1 = 0,ads2 = 0,ads3 = 0,ads4 = 0;
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uint8_t ads_ch = 0;
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long ads1220_data[4];
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long ads_v[4][10];
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long long ads_sum = 0;
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/************************************************
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函数名称 ： ads1220_write_byte
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功 能 ： SPI写读一个字节
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参 数 ： Byte ---- 数据
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返 回 值 ： Byte ---- 数据
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*************************************************/
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uint8_t ads1220_write_byte( uint8_t Byte )
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{
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uint8_t i;
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ADS1220_SCK(0);
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for(i = 0;i < 8;i++)
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{
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ADS1220_SCK(1);
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delay_us(1); // 空等待
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if(Byte & 0x80)
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{
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ADS1220_MOSI(1);
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}
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else
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{
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ADS1220_MOSI(0);
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}
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Byte <<= 1;
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delay_us(1); // 空等待
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ADS1220_SCK(0);
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delay_us(1); // 空等待
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Byte |= ADS1220_MISO;
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}
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return Byte;
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}
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/************************************************
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函数名称 ： ads1220_read_byte
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功 能 ： SPI只读一个字节
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参 数 ： 无
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返 回 值 ： temp ---- 数据
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*************************************************/
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uint8_t ads1220_read_byte(void)
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{
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uint8_t i;
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uint8_t temp = 0;
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ADS1220_SCK(0);
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for(i = 0;i < 8;i++)
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{
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ADS1220_SCK(1);
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delay_us(1); // 空等待
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temp <<= 1;
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temp |= ADS1220_MISO;
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delay_us(1); // 空等待
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ADS1220_SCK(0);
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delay_us(1); // 空等待
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}
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return temp;
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}
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/*******************************************************************************
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函数名称 ： ads1220_writeregister
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功 能 ： 数据写入到寄存器
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参 数 ： StartAddress--寄存器写入起始地址，NumRegs--寄存器数量，pData---写入的数据
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返 回 值 ： 无
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*******************************************************************************/
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void ads1220_writeregister(int StartAddress, int NumRegs, uint8_t * pData)
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{
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int i;
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ADS1220_NSS(0);
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/* send the command byte */
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ads1220_write_byte( ADS1220_WREG | (((StartAddress << 2) & 0x0c) | ((NumRegs - 1) & 0x03)));
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/* send the data bytes */
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for(i = 0; i < NumRegs; i++)
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{
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ads1220_write_byte(*pData++);
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}
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ADS1220_NSS(1);
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}
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/*******************************************************************************
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函数名称 ： ads1220_init
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功 能 ： ads1220初始化
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参 数 ： 无
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返 回 值 ： 无
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*******************************************************************************/
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void ads1220_init(void)
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{
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uint8_t config_0 = 0x81; //写入配置寄存器0,使用AIN0,AVSS,1倍增益,禁用PGA
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uint8_t config_1 = 0xC0; //写入配置寄存器1,使用正常工作模式,单次转换模式,
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uint8_t config_2 = 0x40; //写入配置寄存器2,使用外部基准,无滤波
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uint8_t config_3 = 0x00; //写入配置寄存器3,使用设置独立的DRY引脚
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ADS1220_NSS(0);
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ads1220_write_byte(ADS1220_RESET);//复位命令
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delay_ms(10);
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ADS1220_NSS(1);
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ads1220_writeregister(0x00, 1, &config_0);
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ads1220_writeregister(0x01, 1, &config_1);
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ads1220_writeregister(0x02, 1, &config_2);
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ads1220_writeregister(0x03, 1, &config_3);
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ADS1220_NSS(0);
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delay_ms(10);
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ads1220_write_byte(ADS1220_START);//开启一次转换
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}
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/*******************************************************************************
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函数名称 ： ads1220_setchannl
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功 能 ： 设置转换通道
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参 数 ： channl--通道号
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返 回 值 ： 无
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*******************************************************************************/
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void ads1220_setchannl(uint8_t channl)
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{
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ads1220_writeregister(0x00, 1, &channl);
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ads1220_write_byte(ADS1220_START);
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while(ADS1220_DRDY);
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}
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/*******************************************************************************
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函数名称 ： ads1220_readdata
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功 能 ： 读取ads1220数据
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参 数 ： 无
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返 回 值 ： ads1220转换数据
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*******************************************************************************/
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unsigned int ads1220_readdata(void)
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{
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long ads_data;
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ADS1220_NSS(0);
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ads1220_write_byte(ADS1220_RDATA);
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ads_data = ads1220_read_byte();
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ads_data = (ads_data << 8) | ads1220_read_byte();
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ads_data = (ads_data << 8) | ads1220_read_byte();
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/* sign extend data */
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if (ads_data & 0x800000)
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{
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//ads_data -= 0x800000;
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ads_data |= 0xff000000;
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}
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ADS1220_NSS(1);
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return ads_data;
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}
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/*******************************************************************************
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函数名称 ： get_data
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功 能 ： 获取四路输入电流并存储
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参 数 ： 无
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返 回 值 ： 无
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*******************************************************************************/
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void ads1220_get_data(void)
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{
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switch(ads_ch)
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{
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case 0://读取通道0 然后切换到通道1
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{
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ads1220_data[ads_ch] = ads1220_readdata();
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ads_v[ads_ch][ads1] = (long)((float)( ads1220_data[ads_ch] * 2.5f / 8388608 ) * 10000);//转换为电流 单位uA
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ads1++;
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if(ads1 > 9) ads1 = 0;
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for(int i = 0;i < 10;i++)
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{
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ads_sum += ads_v[ads_ch][i];
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}
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InputReg[8] = ads_sum / 10;
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ads_sum = 0;
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ads_ch = 1;
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ads1220_setchannl(AIN1_AVSS);
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}
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break;
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case 1://读取通道1 然后切换到通道2
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{
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ads1220_data[ads_ch] = ads1220_readdata();
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// ads_v[ads_ch][ads2] = (long)((float)( ads1220_data[ads_ch] * 2.5f / 8388608 ) * 10000);//转换为电流 单位uA
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ads_v[ads_ch][ads2] = (long)(ads1220_data[ads_ch]/8388608.0*2500);
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ads2++;
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if(ads2 > 9) ads2 = 0;
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for(int i = 0;i < 10;i++)
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{
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ads_sum += ads_v[ads_ch][i];
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}
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InputReg[9] = ads_sum / 10.0;
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ads_sum = 0;
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ads_ch = 2;
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ads1220_setchannl(AIN2_AVSS);
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}
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break;
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case 2://读取通道2 然后切换到通道3
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{
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ads1220_data[ads_ch] = ads1220_readdata();
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ads_v[ads_ch][ads3] = (long)((float)( ads1220_data[ads_ch] * 2.5f / 8388608 ) * 10000);//转换为电流 单位uA
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ads3++;
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if(ads3 > 9) ads3 = 0;
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for(int i = 0;i < 10;i++)
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{
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ads_sum += ads_v[ads_ch][i];
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}
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InputReg[10] = ads_sum / 10;
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ads_sum = 0;
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ads_ch = 3;
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ads1220_setchannl(AIN3_AVSS);
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}
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break;
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case 3://读取通道3 然后切换到通道0
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{
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ads1220_data[ads_ch] = ads1220_readdata();
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// ads_v[ads_ch][ads4] = (long)((float)( ads1220_data[ads_ch] * 2.5f / 8388608 ) * 10000);//转换为电流 单位uA
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ads_v[ads_ch][ads2] = (long)(ads1220_data[ads_ch]/8388608.0*2500);
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ads4++;
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if(ads4 > 9) ads4 = 0;
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for(int i = 0;i < 10;i++)
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{
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ads_sum += ads_v[ads_ch][i];
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}
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InputReg[11] = ads_sum / 10;
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ads_sum = 0;
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ads_ch = 0;
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ads1220_setchannl(AIN0_AVSS);
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}
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break;
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}
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}
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