PM0237 datasheet(40/88 Pages) STMICROELECTRONICS

40 / 88 page

BlueNRG, BlueNRG-MS stacks architecture and ACI

PM0237

40/88

DocID027104 Rev 2

2.4

How to port the ACI SPI interface framework to a selected

microcontroller

BlueNRG, BlueNRG-MS devices are network coprocessors providing the Bluetooth low

energy features. In order to get access to its functionality, an external microcontroller can be

used by implementing the ACI SPI interface framework previously described. BlueNRG,

BlueNRG-MS development kits software package provides a reference framework targeting

this ACI SPI interface. This framework can be ported to another external microcontroller by

following these steps:

Define a specific "USER_Platform_Configuration.h" with specific user platform SPI

configuration

On the selected user application preprocessor options, add this define:

USER_DEFINED_PLATFORM=USER_EVAL_PLATFORM

Replace the STM32L1xx libraries on folder

platform\STM32L1XX\Libraries\STM32L1xx_StdPeriph_Driver folder with the specific

microcontroller low level drivers

Replace the CMSIS Cortex-M3 files and the startup file (file startup_stm32l1xx_md.s)

accordingly to the selected microcontroller

Readapt/port accordingly to the selected microcontroller the file system_stm32l1xx.c

handling the system clock configuration for STM32L1xx

Adapt/port the files described in the section in order to refer to the selected external

microcontroller low level drivers.

Readapt/port accordingly to the selected microcontroller the stm32l1xx_it.c (make sure that

HCI_Isr() is called within the SPI irq API handling the external IRQ interrupt on the IRQ line)

Once the ACI SPI interface framework has been ported to the selected microcontroller, user

can verify that SPI access from external microcontroller is working by performing the basic

test described in the section “SPI Interface” of the application note AN4494 “Bringing up the

BlueNRG, BlueNRG-MS”

, available on ST BlueNRG and BlueNRG-MS web pages.

PM0237 데이터시트(PDF) 40 Page - STMicroelectronics