what is the use of SPI_IRQ pin in IDB05A1 BLE module.

[Nikhil Gayke]

/**

 * @brief Reports if the BlueNRG has data for the host micro.

 *

 * @param None

 * @retval int32_t: 1 if data are present, 0 otherwise

 */

static int32_t IsDataAvailable(void)

{

 return (HAL_GPIO_ReadPin(HCI_TL_SPI_EXTI_PORT, HCI_TL_SPI_EXTI_PIN) == GPIO_PIN_SET);

}

if it indicate that it has data for mater can we use this as a wake up to controller. by checking pin status can we wakeup the MCU when the data is available.

[Sebastien DENOUAL]

Hi @Nikhil Gayke​ ,

This is true. I confirm this SPI IRQ pin of IDBO5A1 (BlueNRG-MS) is raise High by BlueNRG-MS network processor to indicate that there is some data available and host MCU (STM32) can perform SPI read. I do not see blocking point to use it for waking up Host MCU (of course, host MCU remains SPI master and is in charge of control/configure BlueNRG-MS)

Regards,

Sebastien.

[Nikhil Gayke]

does this code wake the MCU from low power mode

static int32_t IsDataAvailable(void)

{

if(HAL_GPIO_ReadPin(HCI_TL_SPI_EXTI_PORT, HCI_TL_SPI_EXTI_PIN) == GPIO_PIN_SET)

{

Flag=True;

}

   else

   {

   Flag=False;

   }

}

void MX_BlueNRG_MS_Process(void)

{

if(set_connectable==TRUE && Flag==True)

{

User_Process();

hci_user_evt_proc();

}

else

{

__disable_irq();

LPM_Enter_Mode();

}

__enable_irq();

}

@Agnieszka Stawiarska​ @Sebastien DENOUAL​ @s2399​ @s_abbot​ @s_michas​