求助：AD7190软件驱动

只看该作者 · 2012-10-9 12:11

有谁用过AD7190作为测压力的电压啊？我是软件新手，刚开始学写程序，我从ADI官网上下了一个AD7190的初始化程序，再根据我的电路对配置寄存器做了一定的修改，结果发现AD转换后得到的数据始终为0,这时怎么回事啊。初始化源码见下：
void LC_Init(void)
{
CPU_CS0_ADC = 0;
nops();
buf[2] = 0xff;
buf[1] = 0xff;
buf[0] = 0xff;
WriteToAD7190(3,buf); //Reset AD7190 CHIP.
buf[1] = 0xff;
buf[0] = 0xff;
WriteToAD7190(2,buf); //Reset AD7190 CHIP.
/* buf[0] = 0x40;
WriteToAD7190(1,buf);  //write communication register 0x50 to control the progress to read state register
ReadFromAD7190(3,buf);  //read state register
*/
//  Configuration register
buf[0] = 0x10;
WriteToAD7190(1,buf); //write communication register（8-bits） 0x10 to control the progress to write configuration register
buf[2] = 0x00;
buf[1] = 0x01;
buf[0] = 0x5f; //enable to check Vrefin.enable the buffer.
WriteToAD7190(3,buf);  //write configuration register:disable chop,unipolar operation,gain=128,channel:AIN1 to AIN2
// mode register(Internal zero calibration)
buf[0] = 0x08;
WriteToAD7190(1,buf);  //write communication register 0x08 to control the progress to write mode register
buf[2] = 0x94; //enable transfor the data of status register and enable external 4.92MHz clock.
buf[1] = 0x03; //select to Continuous Conversion mode
buf[0] = 0xFF;
WriteToAD7190(3,buf);  //write mode register,external 4.92MHz clock,output data rate=4.7Hz
// mode register(Internal full scale calibration)
buf[0] = 0x08;
WriteToAD7190(1,buf);  //write communication register 0x08 to control the progress to write mode register
buf[2] = 0xB4; //enable transfor the data of status register and enable external 4.92MHz clock.
buf[1] = 0x03; //select to Continuous Conversion mode
buf[0] = 0xFF;
WriteToAD7190(3,buf);  //write mode register,external 4.92MHz clock,output data rate=4.7Hz
// mode register
buf[0] = 0x08;
WriteToAD7190(1,buf);  //write communication register 0x08 to control the progress to write mode register
buf[2] = 0x14; //enable transfor the data of status register and enable external 4.92MHz clock.
buf[1] = 0x03; //select to Continuous Conversion mode
buf[0] = 0xFF;
WriteToAD7190(3,buf);  //write mode register,external 4.92MHz clock,output data rate=4.7Hz
// read ID register
buf[0] = 0x64;
WriteToAD7190(1,buf);  //write communication register 0x64 to control the progress to read ID register
ReadFromAD7190(1,buf);  //read ID register
// read data register
  buf[0] = 0x5A; //enable Continuous transformation format
WriteToAD7190(1,buf);  //write communication register 0x58 to control the progress to read data register
ReadFromAD7190(3,buf);  //read data register
CPU_CS0_ADC = 1;

return;

}

只看该作者 · 2012-10-9 12:35

AD7190是目前国内最牛的AD了，这个程序是可以用的，可能是你底层SPI有问题吧？

只看该作者 · 2012-10-9 12:38

先排除硬件问题吧，再用示波器或逻辑分析仪看看波形。

只看该作者 · 2012-10-9 12:52

我将MCU的SPI功能已关闭，使用的是模拟的时钟来进行读写数据的。
void WriteToAD7190(unsigned char count, unsigned char *buf)
{
unsigned char ValueToWrite = 0;
unsigned char i = 0;
unsigned char j = 0;

CPU_SCK = 1; // the clock is set.
waiting(1);

// CPU_CS0_ADC = 1; // the SSEL1 is set.
// waiting(1);

// CPU_CS0_ADC = 0; // the SSEL1 is clear.
// waiting(1);

for(i=count;i>0;i--)
{
     ValueToWrite = *(buf + i - 1);
for(j=0; j<8; j++)
{
CPU_SCK = 0; // the clock is clear.
if(0x80 == (ValueToWrite & 0x80))
{
CPU_DO = 1;    //Send one to SDO pin
}
else
{
CPU_DO = 0;    //Send zero to SDO pin
}
waiting(1);
CPU_SCK = 1;
waiting(1);
ValueToWrite <<= 1; //Rotate data
}
}
// CPU_CS0_ADC = 1;
}

//---------------------------------
//void ReadFromAD7190(unsigned char count,unsigned char *buf)
//---------------------------------
//Function that reads from the AD7190 via the SPI port.
//--------------------------------------------------------------------------------
void ReadFromAD7190(unsigned char count, unsigned char *buf)
{
unsigned char i = 0;
unsigned char j = 0;
unsigned long    iTemp = 0; //ARM:int is a 32-bits,C51:int is 16-bits
unsigned char    RotateData = 0;

CPU_SCK = 1;
waiting(1);
// CPU_CS0_ADC = 1;
// waiting(1);
// CPU_CS0_ADC = 0;
// waiting(1);

for(j=count; j>0; j--)
{
for(i=0; i<8; i++)
{
            CPU_SCK = 0;
RotateData <<= 1; //Rotate data,equel RotateData = RotateData << 1;
waiting(1);
iTemp = CPU_DI; //Read SDI of AD7190
CPU_SCK = 1;
if(0x00000020 == (iTemp & 0x00000020)) //ARM:int is a 32-bits,C51:int is 16-bits
{
RotateData |= 1;
}

waiting(1);
}
*(buf + j - 1)= RotateData;
}
// CPU_CS0_ADC = 1;
}

只看该作者 · 2012-10-9 12:54

我在不初始化AD7190时，复位后读了状态寄存器、配置寄存器和模式寄存器，其中模式寄存器读回的数据为0，而不是0X080060

只看该作者 · 2012-11-26 09:07

不知楼主搞定没？
我现在也在用AD7190，发现读写状态寄存器，配置寄存器，模式寄存器都好用，但就是读数据是感觉不对，数跳得厉害。

只看该作者 · 2012-12-11 16:41

楼主，通道装换具体怎样选择啊？我只是数据寄存器的数据，但都是零，还有就是转换速率应该怎样匹配

只看该作者 · 2013-2-20 13:45

请问楼主，是否调试成功？我是用的AD7192，刚刚调试，就是调不通，数据乱跳，请给点意见。。。

只看该作者 · 2024-2-1 12:57

平替ADI芯片
SIG7190 平替 AD7190
SIG7192 平替 AD7192
SIG7193 平替 AD7193

平替TI芯片
SIG1232A 平替 ADS1232 (24-bit）
SIG1230A 平替 ADS1230 (20-bit）

平替ADI芯片
SIG7792 平替 AD7792
SIG7793 平替 AD7793
SIG7794 平替 AD7794
SIG7795 平替 AD7795
SIG7796 平替 AD7796
SIG7797 平替 AD7797
SIG7798 平替 AD7798
SIG7799 平替 AD7799

平替Cirrus Logic芯片
SIG5532B 平替 CS5532BS（32-bit）
SIG5534B 平替 CS5534BS（32-bit）
SIG5532A 平替 CS5532AS（24-bit）
SIG5534A 平替 CS5534AS（24-bit）
SIG5530 平替 CS5530 （24-bit）
SIG5530B 平替 CS5530（32-bit）

功能替代TI芯片
SIG24130/SIG24131/SIG24132 替代 ADS1220、ADS1247、ADS1248
SIG16130/SIG16131/SIG16132 替代 ADS1120、ADS1147、ADS1148

求助：AD7190软件驱动

相关下载

相关帖子

技术高手奖章

常驻人口

经常做客

技术奇才奖章

无冕之王奖章

沉静之湖泊

缘定三生

技术导师奖章

技术新星奖章