CC2650 Spi Slave

Hi,
Can you use HostTest project as a reference? We have a SPI slave implemented in that project that comes with our latest SDK release. Specifically in the npi_tl_spi.c file.

Hi,

I am trying to communicate between CC2650 and external MCU via SPI. I was using HostTest BLE project as reference. I created a custom task for SPI initialization w.r.t npi_tl_spi.c . The external MCU is configured as MASTER and CC2650 as slave. The MASTER keeps on pushing data and CC2650 receives some characters. But not fully. I can't figure out where I am messing the communication. I am adding a snippet of the code for the CC2650 section. I didn't incorporate BLE section in the project. It's just simple SPI communication between two micro controllers.
#include <xdc/runtime/Error.h>
#include <ti/sysbios/family/arm/cc26xx/Power.h>
#include <ti/sysbios/BIOS.h>

#include "ICall.h"
#include "Board.h"
#include "inc/npi_task.h"

#include "HostTestApp.h"

/* Header files required to enable instruction fetch cache */
#include <inc/hw_memmap.h>
#include <driverlib/vims.h>

#ifndef USE_DEFAULT_USER_CFG

#include "bleUserConfig.h"

// BLE user defined configuration
bleUserCfg_t user0Cfg = BLE_USER_CFG;

#endif // USE_DEFAULT_USER_CFG

/*******************************************************************************
* CONSTANTS
*/

/*******************************************************************************
* MACROS
*/
#include <ti/drivers/SPI.h> // header for SPI
#include <ti/sysbios/knl/Task.h> // header for task struct
#include <xdc/runtime/System.h> // header for system printf

#define SPI_SLAVE_STACK_SIZE 1024
#define SPI_SLAVE_TASK_PRIORITY 1

// Task configuration
Task_Struct spi_slave_Task;
Char spi_slave_Task_stack[SPI_SLAVE_STACK_SIZE];
#define SPI_SLAVE_BAUD_RATE 8000000
SPI_Handle handle;
SPI_Params params;
SPI_Transaction spiTransaction;
uint8_t receiveBufferPointer[50];
uint8_t transmitBufferPointer[]={0};
int ret=0;

/**
* Exception handler
*/
void exceptionHandler()
{
while(1){}
}
void spi_tx_call(SPI_Handle handle, SPI_Transaction *objTransaction)
{
System_printf("\n RX");
}
void spi_slave_task_fxn(UArg a0, UArg a1)
{
SPI_Params_init(&params);
// Slave mode
params.mode = SPI_SLAVE;
params.bitRate = SPI_SLAVE_BAUD_RATE;
params.frameFormat = SPI_POL1_PHA1;
// params.transferMode = SPI_MODE_CALLBACK;
// params.transferCallbackFxn = spi_tx_call;

handle=SPI_open(Board_SPI0,&params);
if(!handle){
System_printf("SPI did not open");
}
System_printf("\n SPI initialization done");

spiTransaction.rxBuf= receiveBufferPointer;
spiTransaction.txBuf = transmitBufferPointer;
spiTransaction.count=64;

while(1)
{
SPI_transfer(handle,&spiTransaction);
}
}
/*
* ======== main ========
*/
int main()
{
PIN_init(BoardGpioInitTable);

Task_Params taskParams;

// Configure task
Task_Params_init(&taskParams);
taskParams.stack = spi_slave_Task_stack;
taskParams.stackSize = SPI_SLAVE_STACK_SIZE;
taskParams.priority = SPI_SLAVE_TASK_PRIORITY;

Task_construct(&spi_slave_Task, spi_slave_task_fxn, &taskParams, NULL);

/* enable interrupts and start SYS/BIOS */
BIOS_start();

return 0;
}


1) Is there something like BLE section should be incorporated (ICall_init() and others)?

2) I had tried another configuration for CC2650 in which when I change the params.dataSize value, the number of data getting received changes, But then also it is jumbled. I am sending data like 0xFE,0xFF,0x00,0x01,0x02,.... till 0x1D. At CC2650, watch window, I can see 0xFE,0x02,0x08,0x0E...

SPI_Params_init(&params);
// params.transferMode=SPI_MODE_BLOCKING;
// params.bitRate=1000000;//1000000
params.mode=SPI_SLAVE;
// params.frameFormat= SPI_POL1_PHA1;
params.dataSize=48;
handle=SPI_open(Board_SPI0,&params);
if(!handle){
System_printf("SPI did not open");
}
System_printf("\n SPI initialization done");

spiTransaction.rxBuf= receiveBufferPointer;
spiTransaction.txBuf = transmitBufferPointer;
spiTransaction.count=32;

I added 0xFE thinking if SOF is a must.