國產8通道24位ADC SGM58601(替代ADS1256)GD32單片機驅動程序調試

ID:337280 · 發表于 2024-1-19 20:49

調試過程中遇到的問題：
最大的問題，使用SPI驅動時讀數為0 -1 或者其他很大的數（都是不對的數），經過反復驗證后發現與SPI時鐘有關，參考STM32 驅動ADS1256程序硬件SPI 時鐘分頻為256，燒錄后驅動正常，修改分頻系數后，讀數異常。但是256分頻后時鐘頻率約1.幾KHz 速度太慢。有反復調試了一會，發現SPI時鐘速度，ADC采樣頻率都可能會導致讀數錯誤，具體問題沒有細究。經過調試后可以使用該程序驅動SGM58601。下面附上代碼，單片機為GD32E103。

單片機源程序如下:

#ifndef _SGM58601_H
#define _SGM58601_H
#include "gd32e10x.h"
#include "systick.h"
#include "spi.h"
#define SGM58601_DRDY_PIN GPIO_PIN_3
#define SGM58601_DRDY gpio_input_bit_get(GPIOA, SGM58601_DRDY_PIN)
//define commands
#define SGM58601_CMD_WAKEUP 0x00
#define SGM58601_CMD_RDATA 0x01
#define SGM58601_CMD_RDATAC 0x03
#define SGM58601_CMD_SDATAC 0x0f
#define SGM58601_CMD_RREG 0x10
#define SGM58601_CMD_WREG 0x50
#define SGM58601_CMD_SELFCAL 0xf0
#define SGM58601_CMD_SELFOCAL 0xf1
#define SGM58601_CMD_SELFGCAL 0xf2
#define SGM58601_CMD_SYSOCAL 0xf3
#define SGM58601_CMD_SYSGCAL 0xf4
#define SGM58601_CMD_SYNC 0xfc
#define SGM58601_CMD_STANDBY 0xfd
#define SGM58601_CMD_REST 0xfe
//define the SGM58601 register values
#define SGM58601_STATUS 0x00
#define SGM58601_MUX 0x01
#define SGM58601_ADCON 0x02
#define SGM58601_DRATE 0x03
#define SGM58601_IO 0x04
#define SGM58601_OFC0 0x05
#define SGM58601_OFC1 0x06
#define SGM58601_OFC2 0x07
#define SGM58601_FSC0 0x08
#define SGM58601_FSC1 0x09
#define SGM58601_FSC2 0x0A
//define multiplexer codes
#define SGM58601_MUXP_AIN0 0x00
#define SGM58601_MUXP_AIN1 0x10
#define SGM58601_MUXP_AIN2 0x20
#define SGM58601_MUXP_AIN3 0x30
#define SGM58601_MUXP_AIN4 0x40
#define SGM58601_MUXP_AIN5 0x50
#define SGM58601_MUXP_AIN6 0x60
#define SGM58601_MUXP_AIN7 0x70
#define SGM58601_MUXP_AINCOM 0x80
#define SGM58601_MUXN_AIN0 0x00
#define SGM58601_MUXN_AIN1 0x01
#define SGM58601_MUXN_AIN2 0x02
#define SGM58601_MUXN_AIN3 0x03
#define SGM58601_MUXN_AIN4 0x04
#define SGM58601_MUXN_AIN5 0x05
#define SGM58601_MUXN_AIN6 0x06
#define SGM58601_MUXN_AIN7 0x07
#define SGM58601_MUXN_AINCOM 0x08
//define gain codes
#define SGM58601_GAIN_1 0x00
#define SGM58601_GAIN_2 0x01
#define SGM58601_GAIN_4 0x02
#define SGM58601_GAIN_8 0x03
#define SGM58601_GAIN_16 0x04
#define SGM58601_GAIN_32 0x05
#define SGM58601_GAIN_64 0x06
//#define SGM58601_GAIN_64 0x07
//define drate codes
#define SGM58601_DRATE_30000SPS 0xF0
#define SGM58601_DRATE_15000SPS 0xE0
#define SGM58601_DRATE_7500SPS 0xD0
#define SGM58601_DRATE_3750SPS 0xC0
#define SGM58601_DRATE_2000SPS 0xB0
#define SGM58601_DRATE_1000SPS 0xA1
#define SGM58601_DRATE_500SPS 0x92
#define SGM58601_DRATE_100SPS 0x82
#define SGM58601_DRATE_60SPS 0x72
#define SGM58601_DRATE_50SPS 0x63
#define SGM58601_DRATE_30SPS 0x53
#define SGM58601_DRATE_25SPS 0x43
#define SGM58601_DRATE_15SPS 0x33
#define SGM58601_DRATE_10SPS 0x23
#define SGM58601_DRATE_5SPS 0x13
#define SGM58601_DRATE_2_5SPS 0x03
// define commands
#define SGM58601_CMD_WAKEUP 0x00
#define SGM58601_CMD_RDATA 0x01
#define SGM58601_CMD_RDATAC 0x03
#define SGM58601_CMD_SDATAC 0x0f
#define SGM58601_CMD_RREG 0x10
#define SGM58601_CMD_WREG 0x50
#define SGM58601_CMD_SELFCAL 0xf0
#define SGM58601_CMD_SELFOCAL 0xf1
#define SGM58601_CMD_SELFGCAL 0xf2
#define SGM58601_CMD_SYSOCAL 0xf3
#define SGM58601_CMD_SYSGCAL 0xf4
#define SGM58601_CMD_SYNC 0xfc
#define SGM58601_CMD_STANDBY 0xfd
#define SGM58601_CMD_REST 0xfe
//define the SGM58601 register values
#define SGM58601_STATUS 0x00
#define SGM58601_MUX 0x01
#define SGM58601_ADCON 0x02
#define SGM58601_DRATE 0x03
#define SGM58601_IO 0x04
#define SGM58601_OFC0 0x05
#define SGM58601_OFC1 0x06
#define SGM58601_OFC2 0x07
#define SGM58601_FSC0 0x08
#define SGM58601_FSC1 0x09
#define SGM58601_FSC2 0x0A
//define multiplexer codes
#define SGM58601_MUXP_AIN0 0x00
#define SGM58601_MUXP_AIN1 0x10
#define SGM58601_MUXP_AIN2 0x20
#define SGM58601_MUXP_AIN3 0x30
#define SGM58601_MUXP_AIN4 0x40
#define SGM58601_MUXP_AIN5 0x50
#define SGM58601_MUXP_AIN6 0x60
#define SGM58601_MUXP_AIN7 0x70
#define SGM58601_MUXP_AINCOM 0x80
#define SGM58601_MUXN_AIN0 0x00
#define SGM58601_MUXN_AIN1 0x01
#define SGM58601_MUXN_AIN2 0x02
#define SGM58601_MUXN_AIN3 0x03
#define SGM58601_MUXN_AIN4 0x04
#define SGM58601_MUXN_AIN5 0x05
#define SGM58601_MUXN_AIN6 0x06
#define SGM58601_MUXN_AIN7 0x07
#define SGM58601_MUXN_AINCOM 0x08
//define gain codes
#define SGM58601_GAIN_1 0x00
#define SGM58601_GAIN_2 0x01
#define SGM58601_GAIN_4 0x02
#define SGM58601_GAIN_8 0x03
#define SGM58601_GAIN_16 0x04
#define SGM58601_GAIN_32 0x05
#define SGM58601_GAIN_64 0x06
//#define SGM58601_GAIN_64 0x07
//define drate codes
#define SGM58601_DRATE_30000SPS 0xF0
#define SGM58601_DRATE_15000SPS 0xE0
#define SGM58601_DRATE_7500SPS 0xD0
#define SGM58601_DRATE_3750SPS 0xC0
#define SGM58601_DRATE_2000SPS 0xB0
#define SGM58601_DRATE_1000SPS 0xA1
#define SGM58601_DRATE_500SPS 0x92
#define SGM58601_DRATE_100SPS 0x82
#define SGM58601_DRATE_60SPS 0x72
#define SGM58601_DRATE_50SPS 0x63
#define SGM58601_DRATE_30SPS 0x53
#define SGM58601_DRATE_25SPS 0x43
#define SGM58601_DRATE_15SPS 0x33
#define SGM58601_DRATE_10SPS 0x23
#define SGM58601_DRATE_5SPS 0x13
#define SGM58601_DRATE_2_5SPS 0x03
void SGM58601_Gpio_Init(void); //SGM58601 GPIO初始化
void SGM58601AWREG(unsigned char regaddr,unsigned char databyte); //SGM58601A 寫寄存器
void SGM58601BWREG(unsigned char regaddr,unsigned char databyte); //SGM58601B 寫寄存器
signed int SGM58601AReadData(unsigned char channel); //SGM58601 讀數據
signed int SGM58601BReadData(unsigned char channel); //SGM58601 讀數據
void SGM58601A_Init(void); //SGM58601A 單端采集初始化
void SGM58601B_Init(void); //SGM58601B 差分采集初始化
int SGM58601_Read_SingleData(unsigned char channel); //SGM58601A 單端ADC讀取
int SGM58601_Read_DiffData(void); //SGM58601B 差分ADC讀取
#endif

復制代碼

#include "SGM58601.H"
void SGM58601_Gpio_Init(void)
{
gpio_init(SGM58601_GPIO_RCU,GPIO_MODE_IN_FLOATING,GPIO_OSPEED_50MHZ, SGM58601_DRDY_PIN);
}
void SGM58601AWREG(unsigned char regaddr,unsigned char databyte) //A
{
SPI_CS1_ENABLE();
while(SGM58601_DRDY);//當SGM58601_DRDY為低時才能寫寄存器
//向寄存器寫入數據地址
SPI0_ReadWriteByte(SGM58601_CMD_WREG | (regaddr & 0x0F));
//寫入數據的個數n-1
SPI0_ReadWriteByte(0x00);
//向regaddr地址指向的寄存器寫入數據databyte
SPI0_ReadWriteByte(databyte);
SPI_CS1_DISABLE();
}
void SGM58601BWREG(unsigned char regaddr,unsigned char databyte) //B
{
SPI_CS2_ENABLE();
while(SGM58601_DRDY);//當SGM58601_DRDY為低時才能寫寄存器
//向寄存器寫入數據地址
SPI0_ReadWriteByte(SGM58601_CMD_WREG | (regaddr & 0x0F));
//寫入數據的個數n-1
SPI0_ReadWriteByte(0x00);
//向regaddr地址指向的寄存器寫入數據databyte
SPI0_ReadWriteByte(databyte);
SPI_CS2_DISABLE();
}
//初始化SGM58601 // 單端采集
void SGM58601A_Init(void) //A
{
//*************自校準****************
// while(SGM58601_DRDY);
// SPI_CS1_ENABLE();
// SPI0_ReadWriteByte(SGM58601_CMD_SELFCAL);
// while(SGM58601_DRDY);
// SPI_CS1_DISABLE();
//**********************************
SGM58601AWREG(SGM58601_STATUS,0x06); // 高位在前、使用緩沖
// SGM58601AWREG(SGM58601_STATUS,0x04); // 高位在前、不使用緩沖
// SGM58601AWREG(SGM58601_MUX,0x08); // 初始化端口A0為‘+’，AINCOM位‘-’
SGM58601AWREG(SGM58601_ADCON,SGM58601_GAIN_1); // 放大倍數1
SGM58601AWREG(SGM58601_DRATE,SGM58601_DRATE_7500SPS); // 數據10sps
SGM58601AWREG(SGM58601_IO,0x00);
//*************自校準****************
// while(SGM58601_DRDY);
// SPI_CS1_ENABLE();
// SPI0_ReadWriteByte(SGM58601_CMD_SELFCAL);
// while(SGM58601_DRDY);
// SPI_CS1_DISABLE();
//**********************************
}
//初始化SGM58601 // 差分采集
void SGM58601B_Init(void) //B
{
//*************自校準****************
// while(SGM58601_DRDY);
// SPI_CS2_ENABLE();
// SPI0_ReadWriteByte(SGM58601_CMD_SELFCAL);
// while(SGM58601_DRDY);
// SPI_CS2_DISABLE();
//**********************************
SGM58601BWREG(SGM58601_STATUS,0x06); // 高位在前、使用緩沖
// SGM58601BWREG(SGM58601_STATUS,0x04); // 高位在前、不使用緩沖
SGM58601BWREG(SGM58601_MUX,0x08); // 初始化端口A0為‘+’，AINCOM位‘-’
SGM58601BWREG(SGM58601_ADCON,SGM58601_GAIN_64); // 放大倍數1
SGM58601BWREG(SGM58601_DRATE,SGM58601_DRATE_2000SPS); // 數據10sps
SGM58601BWREG(SGM58601_IO,0x00);
//*************自校準****************
// while(SGM58601_DRDY);
// SPI_CS2_ENABLE();
// SPI0_ReadWriteByte(SGM58601_CMD_SELFCAL);
// while(SGM58601_DRDY);
// SPI_CS2_DISABLE();
//**********************************
}
//讀取單端AD值
signed int SGM58601AReadData(unsigned char channel) //A
{
unsigned int sum=0;
while(SGM58601_DRDY);//當SGM58601_DRDY為低時才能寫寄存器
SGM58601AWREG(SGM58601_MUX,channel); //設置通道
SPI_CS1_ENABLE();
SPI0_ReadWriteByte(SGM58601_CMD_SYNC);
SPI0_ReadWriteByte(SGM58601_CMD_WAKEUP);
SPI0_ReadWriteByte(SGM58601_CMD_RDATA);
sum |= (SPI0_ReadWriteByte(0xff) << 16);
sum |= (SPI0_ReadWriteByte(0xff) << 8);
sum |= SPI0_ReadWriteByte(0xff);
SPI_CS1_DISABLE();
if (sum>0x7FFFFF) // if MSB=1,
{
sum -= 0x1000000; // do 2's complement
}
return sum;
}
signed int SGM58601BReadData(unsigned char channel) //B
{
unsigned int sum=0;
while(SGM58601_DRDY);//當SGM58601_DRDY為低時才能寫寄存器
SGM58601BWREG(SGM58601_MUX,channel); //設置通道
SPI_CS2_ENABLE();
SPI0_ReadWriteByte(SGM58601_CMD_SYNC);
SPI0_ReadWriteByte(SGM58601_CMD_WAKEUP);
SPI0_ReadWriteByte(SGM58601_CMD_RDATA);
sum |= (SPI0_ReadWriteByte(0xff) << 16);
sum |= (SPI0_ReadWriteByte(0xff) << 8);
sum |= SPI0_ReadWriteByte(0xff);
SPI_CS2_DISABLE();
if (sum>0x7FFFFF) // if MSB=1,
{
sum -= 0x1000000; // do 2's complement
}
return sum;
}
int SGM58601_Read_SingleData(unsigned char channel)
{
return SGM58601AReadData( (channel << 4) | SGM58601_MUXN_AINCOM);
}
int SGM58601_Read_DiffData(void)
{
return SGM58601BReadData( SGM58601_MUXP_AIN0 | SGM58601_MUXN_AIN1);
}

復制代碼

ID:301191 · 發表于 2024-1-20 15:06

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國產8通道24位ADC SGM58601(替代ADS1256)GD32單片機驅動程序調試