PM0237 datasheet(42/88 Pages) STMICROELECTRONICS

42 / 88 page

Design an application using BlueNRG, BlueNRG-MS ACI APIs

PM0237

42/88

DocID027104 Rev 2

3.1

Initialization phase and main application loop

The following main steps are required for properly configure the selected external

microcontroller and the SPI communication with a BlueNRG or BlueNRG-MS device.

Configure selected BlueNRG platform

Configure clock, GPIOs and setup low power mode

Initialize the serial communication channel used for I/O communication (debug and

utility information)

Initialize list heads of ready and free hci data packet queues

Init SPI interface for allowing external microcontroller to get access to the BlueNRG

features properly

Reset the BlueNRG, BlueNRG-MS network coprocessor

Configure BlueNRG, BlueNRG-MS public address (if public address is used)

Init BLE NRG GATT layer

Init BLE NRG GAP layer depending on the selected device role

10. Set the proper security I/O capability and authentication requirement (if BLE NRG

security is used)

11. Define the required Services & Characteristics if the device is a GATT server

12. Add a while(1) loop calling the HCI_Process() API and a specific user application

function where user actions/events are processed (advertising, connections, services

and characteristics discovery, notification and related events ).

The following pseudocode example illustrates the required initialization steps:

int main(void)

{

int ret;

/* Setup the STM32L1xx NVIC vector table base address */

NVIC_SetVectorTable(NVIC_VectTab_FLASH, VECTOR_TABLE_BASE_ADDRESS);

/* Configure selected BlueNRG platform */

SdkEvalIdentification();

/* Configure clock */

RCC_Configuration();

/* Init I/O ports */

Init_GPIOs ();

PWR_PVDCmd(DISABLE);

/* Disable FLASH during Sleep

FLASH_SLEEPPowerDownCmd(ENABLE);

/* Enable Ultra low power mode */

PWR_UltraLowPowerCmd(ENABLE);

PWR_FastWakeUpCmd(DISABLE);

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

/* Init timer used for SPI timeouts */

Clock_Init();

/* Configure I/O communication channel:

It requires the void IO_Receive_Data(uint8_t * rx_data, uint16_t

data_size)function where user received data should be processed */

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