/*
* ======== WiFiCC3100_open ========
*/
WiFi_Handle WiFiCC3100_open(WiFi_Handle handle, unsigned int spiIndex,
WiFi_evntCallback evntCallback, WiFi_Params *params)
{
unsigned int key;
WiFiCC3100_Object *object = handle->object;
WiFiCC3100_HWAttrs const *hwAttrs = handle->hwAttrs;
union {
#if !defined(MSP430WARE)
Hwi_Params hwiParams;
#endif
Semaphore_Params semParams;
} paramsUnion;
key = Hwi_disable();
if (object->isOpen) {
Hwi_restore(key);
Log_warning0("WiFi Hwi already in use.");
return (NULL);
}
object->isOpen = true;
Hwi_restore(key);
/* Construct semaphores to block read/write transactions. */
Semaphore_Params_init(&(paramsUnion.semParams));
paramsUnion.semParams.mode = Semaphore_Mode_BINARY;
paramsUnion.semParams.instance->name = "WiFi.writeSemaphore";
Semaphore_construct(&(object->writeSemaphore), 0, &(paramsUnion.semParams));
paramsUnion.semParams.instance->name = "WiFi.readSemaphore";
Semaphore_construct(&(object->readSemaphore), 0, &(paramsUnion.semParams));
#if !defined(MSP430WARE)
Hwi_Params_init(&(paramsUnion.hwiParams));
paramsUnion.hwiParams.arg = (UArg) handle;
paramsUnion.hwiParams.enableInt = false;
/* Hwi_construct cannot fail, use NULL instead of an Error Block */
Hwi_construct(&(object->wifiHwi), hwAttrs->irqIntNum,
WiFiCC3100_hostIntHandler, &(paramsUnion.hwiParams), NULL);
#endif
#if defined(MSP430WARE) || defined(MSP432WARE)
MAP_GPIO_clearInterruptFlag(hwAttrs->irqPort, hwAttrs->irqPin);
MAP_GPIO_enableInterrupt(hwAttrs->irqPort, hwAttrs->irqPin);
#else
GPIOIntClear(hwAttrs->irqPort, hwAttrs->irqPin);
GPIOIntEnable(hwAttrs->irqPort, hwAttrs->irqPin);
#endif
/* Store SPI interface parameters */
object->spiIndex = spiIndex;
object->bitRate = params->bitRate;
return (handle);
}
/*
* DataService_RegisterAppCBs - Registers the application callback function.
* Only call this function once.
*
* appCallbacks - pointer to application callbacks.
*/
bStatus_t DataService_RegisterAppCBs( DataServiceCBs_t *appCallbacks )
{
if ( appCallbacks )
{
pAppCBs = appCallbacks;
Log_info1("Registered callbacks to application. Struct %p", (IArg)appCallbacks);
return ( SUCCESS );
}
else
{
Log_warning0("Null pointer given for app callbacks.");
return ( FAILURE );
}
}
/*!
* @brief Function to initialize the CC26XX SPI peripheral specified by the
* particular handle. The parameter specifies which mode the SPI
* will operate.
*
* The function will set a dependency on it power domain, i.e. power up the
* module and enable the clock. The IOs are allocated. Neither the SPI nor UDMA module
* will be enabled.
*
* @pre SPI controller has been initialized.
* Calling context: Task
*
* @param handle A SPI_Handle
*
* @param params Pointer to a parameter block, if NULL it will use
* default values
*
* @return A SPI_Handle on success or a NULL on an error or if it has been
* already opened
*
* @sa SPICC26XXDMA_close()
*/
SPI_Handle SPICC26XXDMA_open(SPI_Handle handle, SPI_Params *params)
{
/* Use union to save on stack allocation */
union {
Semaphore_Params semParams;
Hwi_Params hwiParams;
} paramsUnion;
SPI_Params defaultParams;
SPICC26XX_Object *object;
SPICC26XX_HWAttrs const *hwAttrs;
unsigned int key;
/* Get the pointer to the object and hwAttrs */
object = handle->object;
hwAttrs = handle->hwAttrs;
/* Disable preemption while checking if the SPI is open. */
key = Hwi_disable();
/* Check if the SPI is open already with the base addr. */
if (object->isOpen == true) {
Hwi_restore(key);
Log_warning1("SPI:(%p) already in use.", hwAttrs->baseAddr);
return (NULL);
}
/* Mark the handle as being used */
object->isOpen = true;
Hwi_restore(key);
/* If params are NULL use defaults */
if (params == NULL) {
/* No params passed in, so use the defaults */
SPI_Params_init(&defaultParams);
params = &defaultParams;
}
Assert_isTrue((params->dataSize >= 4) &&
(params->dataSize <= 16), NULL);
/* Initialize the SPI object */
object->currentTransaction = NULL;
object->bitRate = params->bitRate;
object->dataSize = params->dataSize;
object->frameFormat = params->frameFormat;
object->mode = params->mode;
object->transferMode = params->transferMode;
object->transferTimeout = params->transferTimeout;
object->returnPartial = false;
#ifdef SPICC26XXDMA_WAKEUP_ENABLED
object->wakeupCallbackFxn = NULL;
#endif
/* Determine if we need to use an 8-bit or 16-bit framesize for the DMA */
object->frameSize = (params->dataSize < 9) ? SPICC26XXDMA_8bit : SPICC26XXDMA_16bit;
Log_print2(Diags_USER2,"SPI:(%p) DMA buffer incrementation size: %s",
hwAttrs->baseAddr,
(object->frameSize) ? (UArg)"16-bit" : (UArg)"8-bit");
/* Register power dependency - i.e. power up and enable clock for SPI. */
Power_setDependency(hwAttrs->powerMngrId);
/* Configure the hardware module */
SPICC26XXDMA_initHw(handle);
/* CSN is initialized using hwAttrs initially, but can be re-configured later */
object->csnPin = hwAttrs->csnPin;
/* Configure IOs after hardware has been initialized so that IOs aren't */
/* toggled unnecessary and make sure it was successful */
if (!SPICC26XXDMA_initIO(handle)) {
/* Trying to use SPI driver when some other driver or application
* has already allocated these pins, error! */
Log_warning0("Could not allocate SPI pins, already in use.");
/* Release power dependency - i.e. potentially power down serial domain. */
Power_releaseDependency(hwAttrs->powerMngrId);
/* Mark the module as available */
key = Hwi_disable();
object->isOpen = false;
Hwi_restore(key);
/* Signal back to application that SPI driver was not succesfully opened */
return (NULL);
}
/* Create the Hwi for this SPI peripheral. */
Hwi_Params_init(¶msUnion.hwiParams);
paramsUnion.hwiParams.arg = (UArg) handle;
Hwi_construct(&(object->hwi), (int) hwAttrs->intNum, SPICC26XXDMA_hwiFxn, ¶msUnion.hwiParams, NULL);
/* Check the transfer mode */
if (object->transferMode == SPI_MODE_BLOCKING) {
Log_print1(Diags_USER2, "SPI DMA:(%p) in SPI_MODE_BLOCKING mode",
hwAttrs->baseAddr);
/* Create a semaphore to block task execution for the duration of the
* SPI transfer */
Semaphore_Params_init(¶msUnion.semParams);
paramsUnion.semParams.mode = Semaphore_Mode_BINARY;
Semaphore_construct(&(object->transferComplete), 0, ¶msUnion.semParams);
/* Store internal callback function */
object->transferCallbackFxn = SPICC26XXDMA_transferCallback;
}
else {
Log_print1(Diags_USER2, "SPI DMA:(%p) in SPI_MODE_CALLBACK mode", hwAttrs->baseAddr);
/* Check to see if a callback function was defined for async mode */
Assert_isTrue(params->transferCallbackFxn != NULL, NULL);
/* Save the callback function pointer */
object->transferCallbackFxn = params->transferCallbackFxn;
}
/* Declare the dependency on the UDMA driver */
object->udmaHandle = UDMACC26XX_open();
/* Configure PIN driver for CSN callback in optional RETURN_PARTIAL slave mode */
/* and/or optional wake up on CSN assert slave mode */
if (object->mode == SPI_SLAVE) {
PIN_registerIntCb(object->pinHandle, SPICC26XXDMA_csnCallback);
PIN_setUserArg(object->pinHandle, (UArg) handle);
}
Log_print1(Diags_USER1, "SPI:(%p) opened", hwAttrs->baseAddr);
/* Register notification functions */
#ifdef SPICC26XXDMA_WAKEUP_ENABLED
Power_registerNotify(&object->spiPreObj, Power_ENTERING_STANDBY, (Fxn)spiPreNotify, (UInt32)handle, NULL );
#endif
Power_registerNotify(&object->spiPostObj, Power_AWAKE_STANDBY, (Fxn)spiPostNotify, (UInt32)handle, NULL );
return (handle);
}
