CC3200MOD: question about SPI trasfer size (MAP_SPITransfer)

Hi Hayden,

Please share how you are attempting to put the device into low-power mode after initiating the SPI transfer. Are you simply calling PRCMLPDSEnter() or PRCMHibernateEnter() right after calling SPITransfer()?

Best Regards,
Ben M

Hi Ben,

It is same as in the example of "idle_profile", as below.

(after doing SPI WRITE...)

   iRetVal = osi_MsgQCreate(&g_tWkupSignalQueue, NULL,

                            sizeof( unsigned char ), 10);

   if (iRetVal < 0)

   {

       UART_PRINT("unable to create the msg queue\n\r");

       LOOP_FOREVER();

   }

   tTimerHndl = SetTimerAsWkUp();

   tGPIOHndl = SetGPIOAsWkUp();

   /* handles, if required, can be used to stop the timer, but not used here*/

   UNUSED(tTimerHndl);

   UNUSED(tGPIOHndl);

   /* now go to LPDS ... */

   lp3p0_setup_power_policy(POWER_POLICY_STANDBY); //lp3p0_setup_power_policy(POWER_POLICY_HIBERNATE);

   while(FOREVER)

   {

       //

       // waits for the message from the various interrupt handlers(GPIO,

       // Timer) and the UDPServerTask.

       //

       osi_MsgQRead(&g_tWkupSignalQueue, &ucQueueMsg, OSI_WAIT_FOREVER);

       switch(ucQueueMsg){

           case 1:

               UART_PRINT("timer\n\r");

               break;

           case 2:

               UART_PRINT("GPIO\n\r");

               break;

           case 3:

               UART_PRINT("host irq\n\r");

               break;

           default:

               UART_PRINT("invalid msg\n\r");

               break;

       }

   }

 

Thanks and regards,

Hayden

Ben,

With "idle_profile_freertos", it properly worked (hibernate and wake up).
FYI, I modified the code as below.


(TimerGPIOTask(), main.c of idle_profile_freertos)

/* handles, if required, can be used to stop the timer, but not used here*/
UNUSED(tTimerHndl);
UNUSED(tGPIOHndl);


UART_PRINT(">>>>>> SPI start !!\n\r");
MAP_PRCMPeripheralReset(PRCM_GSPI);
MAP_SPIReset(GSPI_BASE);
MAP_SPIConfigSetExpClk(GSPI_BASE,MAP_PRCMPeripheralClockGet(PRCM_GSPI),
SPI_IF_BIT_RATE,SPI_MODE_MASTER,SPI_SUB_MODE_0, // polality 0, phase 0
(SPI_HW_CTRL_CS | // don't mux out CS Pin, instead mux out the required GPIO, SPI_SW_CTRL_CS
SPI_4PIN_MODE |
SPI_TURBO_OFF |
SPI_CS_ACTIVELOW |
SPI_WL_8));
MAP_SPIEnable(GSPI_BASE);
MAP_SPITransfer(GSPI_BASE, g_ucTxBuff, g_ucRxBuff, 1024, 0);
MAP_SPIDisable(GSPI_BASE);
UART_PRINT(">>>>>> SPI stop !!!\n\r");


//
// setting Apps power policy
//
//lp3p0_setup_power_policy(POWER_POLICY_STANDBY);
lp3p0_setup_power_policy(POWER_POLICY_HIBERNATE);

while(FOREVER)
{
//
// waits for the message from the various interrupt handlers(GPIO,
// Timer) and the UDPServerTask.
//
osi_MsgQRead(&g_tWkupSignalQueue, &ucQueueMsg, OSI_WAIT_FOREVER);
switch(ucQueueMsg){
case 1:
UART_PRINT("timer\n\r");
break;
...


Best regards,
Hayden

Hi Ben,

(update the result)
The cause is the rx buffer size at "MAP_SPITransfer(GSPI_BASE, g_ucTxBuff, g_ucRxBuff, 1024, 0)".
Tx buffer size was 1024. After changing buffer size of g_ucRxBuff as 1024, it worked properly.

Thanks and regards,
Hayden