CC2640R2F: Unable to interface ads1220 using SPI

Hi,

I can't see that you setup the DIOs (DIO8, DIO9 and DIO10) in your code. Do you do that somewhere else?

Best Regards,
R.M

I have used Board_SPI_Master which is linked to CC2640R2_LAUNCHXL_SPI0 which defines (DIO8, DIO9, DIO10) as MISO, MOSI, Clk.

Hi,

You say that you are not able to initialize SPI, does that mean that the SPI_open() fails (returns NULL)?

Do you initialize the SPI module with SPI_init();  first?

Best Regards,

R.M

Hi

I think SPI_Transfer was failing, to check i modified my code, also included SPI_init(). Now SPI_Transfer is not failing but instead i am getting 0x00 as output.

SPI_init();

SPI_Handle handle;
SPI_Params params;
SPI_Transaction transaction;
uint8_t txBuf[] = {0xA1, 0xC0, 0x00, 0x00} ; // Transmit buffer
uint8_t rxBuf[10]; // Receive buffer

// Init SPI and specify non-default parameters
SPI_Params_init(&params);
params.bitRate = 1000000;
params.frameFormat = SPI_POL1_PHA1;
params.mode = SPI_MASTER;

// Configure the transaction
transaction.count = sizeof(txBuf);
transaction.txBuf = txBuf;
transaction.rxBuf = rxBuf;

// Open the SPI and initiate the first transfer
handle = SPI_open(Board_SPI_MASTER, &params);


if(SPI_transfer(handle, &transaction))
{
for(int i =0 ; i<10; i++)

{
uint8 adc = rxBuf[i];
SimpleProfile_SetParameter(SIMPLEPROFILE_CHAR4, sizeof(uint8_t),
&adc);
}

}

SPI_close(handle);

Hi,

I recommend that you start with the SPI Master example first and make that work before merging it into the Simple BLE Peripheral project.

Best Regards,
R.M