ADS1211: ADS1211E

Hi Jayaramulu,

Welcome to the E2E forums!  Unfortunately we do not have any sample code for the ADS1211.  It is in some ways a complicated device with respect to timing of the communication.  How have you verified that you can write to the device if you cannot read from it?

Can you send me your schematic and some scope or logic analyzer shots of your communication?  This would be helpful for me to see what might be going wrong in the communication.

Best regards,

Bob B

writing 0x84 and dummy data 0x00

this is our code ..please review and let me know where iam doing mistake.

/* ========================================
*
* Copyright YOUR COMPANY, THE YEAR
* All Rights Reserved
* UNPUBLISHED, LICENSED SOFTWARE.
*
* CONFIDENTIAL AND PROPRIETARY INFORMATION
* WHICH IS THE PROPERTY OF your company.
*
* ========================================
*/
#include "project.h"

uint8 SPIReadData[4] = {0};
#define READEMASK 0x80
#define WRITEMASK 0x00


#define ADC_DATA_REG2_ADDRESS 0x00
#define ADC_DATA_REG1_ADDRESS 0x01
#define ADC_DATA_REG0_ADDRESS 0x02


#define ADC_CMD_REG3_ADDRESS 0x20
#define ADC_CMD_REG2_ADDRESS 0x05
#define ADC_CMD_REG1_ADDRESS 0x06
#define ADC_CMD_REG0_ADDRESS 0x07



uint8 CMDRegValue[4] = {0};



//void adcWrite(void);
//void adcRead(void);
void adcWrite(uint8 Address,uint8 Data);

void writeADCCMDRegValue(void);
void ReadADCCMDRegValue(void);
uint8 adcRead(uint8 Address);
uint8 CMDbuff[4] = {0xB0,0x04,0xFF,0x80};
//uint8 i = 0;
int main(void)
{

// Clock_1_Start();
SPIM_Start();


CyDelay(1000);
CyGlobalIntEnable; /* Enable global interrupts. */

//CS_Write(1);

while(1 == DRDY_IP_Read());

/* Place your initialization/startup code here (e.g. MyInst_Start()) */
DSYNC_Write(0);

for(;;)
{
writeADCCMDRegValue();
ReadADCCMDRegValue();




}
}

void writeADCCMDRegValue(void)
{
while(1 == DRDY_IP_Read());
CyDelay(1);
// /*Write */
CS_Write(0);


CyDelay(2);
//adcWrite(ADC_CMD_REG0_ADDRESS, 0x16);
//CyDelay(100);
adcWrite(ADC_CMD_REG3_ADDRESS, 0x04);
//CyDelay(100);
//adcWrite(ADC_CMD_REG1_ADDRESS, 0xFF);
//CyDelay(100);
//adcWrite(ADC_CMD_REG0_ADDRESS, 0x80);
//CyDelay(100);
}

void ReadADCCMDRegValue(void)
{
//SPIM_ClearFIFO();
// SPIM_ClearRxBuffer();
//CyDelay(100);
CMDRegValue[0] = adcRead(ADC_CMD_REG0_ADDRESS);
//CyDelay(100);
//CMDRegValue[1] = adcRead(ADC_CMD_REG2_ADDRESS);
CyDelay(100);
// CMDRegValue[2] = adcRead(ADC_CMD_REG1_ADDRESS);
// CyDelay(100);
// CMDRegValue[3] = adcRead(ADC_CMD_REG0_ADDRESS);
// CyDelay(100);
}

void adcWrite(uint8 Address,uint8 Data)
{

while(1 == DRDY_IP_Read());
CyDelay(10);
/*Write */
// CS_Write(0);
// CyDelay(1);
// SPIM_TxEnable();
SPIM_WriteTxData(WRITEMASK | Address);
while(!(SPIM_ReadTxStatus() & SPIM_STS_BYTE_COMPLETE));

// SPIM_TxDisable();
CyDelay(10);

// SPIM_TxEnable();
SPIM_WriteTxData(Data);
while(!(SPIM_ReadTxStatus() & SPIM_STS_BYTE_COMPLETE));

// SPIM_TxDisable();
CyDelay(10);



while(1 == DRDY_IP_Read());
CyDelay(1);


}

uint8 adcRead(uint8 Address)
{
uint8 SPIData = 0;


while(1 == DRDY_IP_Read());
CyDelay(10);

CyDelay(1);


SPIM_WriteTxData(READEMASK |Address);
while(!(SPIM_ReadTxStatus() & SPIM_STS_BYTE_COMPLETE));
while(!(SPIM_ReadRxStatus() & SPIM_STS_RX_FIFO_NOT_EMPTY));
CyDelay(10);
SPIM_ReadRxStatus() ;

SPIM_WriteTxData(0x00);
while(!(SPIM_ReadTxStatus() & SPIM_STS_BYTE_COMPLETE));

CyDelay(1);

SPIData = SPIM_ReadRxData();
CyDelay(100);
while(1 == DRDY_IP_Read());
CyDelay(1);
CS_Write(1);

return SPIData;
}




Thanks & Regards.

Hi Jayaramulu,

I haven't been able to look at your code yet, but it appears that you are attempting to read 1 byte (MSB) of the command register.  However, you never initiate any SCLKs for the retrieval of the register byte.  The micro must initiate the clocks for the register byte as well as the instruction.  This can be initiated by sending a dummy byte of data where the result will be transmitted.  This dummy byte can be 0x00.

Best regards,

Bob B