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diff --git a/Projects/P-NUCLEO-WB55.Nucleo/Examples_MIX/SPI/SPI_FullDuplex_ComPolling_Master/readme.txt b/Projects/P-NUCLEO-WB55.Nucleo/Examples_MIX/SPI/SPI_FullDuplex_ComPolling_Master/readme.txt new file mode 100644 index 000000000..77117f0f8 --- /dev/null +++ b/Projects/P-NUCLEO-WB55.Nucleo/Examples_MIX/SPI/SPI_FullDuplex_ComPolling_Master/readme.txt @@ -0,0 +1,127 @@ +/** + @page SPI_FullDuplex_ComPolling_Master SPI Two Boards Communication example + + @verbatim + ****************************************************************************** + * @file SPI/SPI_FullDuplex_ComPolling_Master/readme.txt + * @author MCD Application Team + * @brief Description of the SPI Full Duplex Polling example. + ****************************************************************************** + * + * Copyright (c) 2019 STMicroelectronics. All rights reserved. + * + * This software component is licensed by ST under BSD 3-Clause license, + * the "License"; You may not use this file except in compliance with the + * License. You may obtain a copy of the License at: + * opensource.org/licenses/BSD-3-Clause + * + ****************************************************************************** + @endverbatim + +@par Example Description + +Data buffer transmission/reception between two boards via SPI using Polling mode. + +Board: P-NUCLEO-WB55 (embeds a STM32WB55RG device) +CLK Pin: PA5 (CN10, pin 11) +MISO Pin: PA6 (CN10, pin 13) +MOSI Pin: PA7 (CN10, pin 15) + _________________________ __________________________ + | ______________| |______________ | + | |SPI1 | | SPI1| | + | | | | | | + | | CLK(PA.05)|______________________|(PA.05)CLK | | + | | | | | | + | | MISO(PA.06)|______________________|(PA.06)MISO | | + | | | | | | + | | MOSI(PA.07)|______________________|(PA.07)MOSI | | + | | | | | | + | |______________| |______________| | + | __ | | | + | |__| | | | + | User push-button (SW1) | | | + | GND|______________________|GND | + | | | | + |_STM32WBxx Master________| |_STM32WBxx Slave_________| + + +At the beginning of the main program the HAL_Init() function is called to reset +all the peripherals, initialize the Flash interface and the systick. +Then the SystemClock_Config() function is used to configure the system +clock (SYSCLK) to run at 64 MHz. + +The SPI peripheral configuration is ensured by the HAL_SPI_Init() function. +This later is calling the HAL_SPI_MspInit()function which core is implementing +the configuration of the needed SPI resources according to the used hardware (CLOCK & +GPIO). You may update this function to change SPI configuration. +The Full-Duplex SPI transfer (16bit) is done using LL Driver functions +LL_SPI_TransmitData16 and LL_SPI_ReceiveData16. + +Example execution: +First step, press the User push-button (User push-button (SW1)), this action initiates a Full-Duplex transfer +between Master and Slave. +After end of transfer, aRxBuffer and aTxBuffer are compared through Buffercmp() in order to +check buffers correctness. + +STM32 board's LEDs can be used to monitor the transfer status: + - LED1 toggles quickly on master board waiting User push-button (SW1) to be pressed. + - LED1 turns ON when the transmission process is complete. + - LED2 turns ON when the reception process is complete. + - LED3 turns ON when there is an error in transmission/reception process. + - LED3 toggles when there is a timeout error in transmission/reception process. + +@note You need to perform a reset on Slave board, then perform it on Master board + to have the correct behaviour of this example. + +@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds) + based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from + a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower) + than the peripheral interrupt. Otherwise the caller ISR process will be blocked. + To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function. + +@note The application need to ensure that the SysTick time base is always set to 1 millisecond + to have correct HAL operation. + +@par Keywords + +Connectivity, SPI, Full-duplex, Transmission, Reception, Master, MISO, MOSI, Polling + +@par Directory contents + + - SPI/SPI_FullDuplex_ComPolling_Master/Inc/stm32wbxx_hal_conf.h HAL configuration file + - SPI/SPI_FullDuplex_ComPolling_Master/Inc/stm32wbxx_it.h Interrupt handlers header file + - SPI/SPI_FullDuplex_ComPolling_Master/Inc/main.h Header for main.c module + - SPI/SPI_FullDuplex_ComPolling_Master/Src/stm32wbxx_it.c Interrupt handlers + - SPI/SPI_FullDuplex_ComPolling_Master/Src/main.c Main program + - SPI/SPI_FullDuplex_ComPolling_Master/Src/system_stm32wbxx.c stm32wbxx system source file + - SPI/SPI_FullDuplex_ComPolling_Master/Src/stm32wbxx_hal_msp.c HAL MSP file + +@par Hardware and Software environment + + - This example runs on STM32WB55xx devices. + + - Take care to cable connection between Master and Slave Board: + Cable shall be smaller than 5 cm and rigid if possible. + + - This example has been tested with P-NUCLEO-WB55 board and can be + easily tailored to any other supported device and development board. + + - P-NUCLEO-WB55 Set-up + - Connect Master board PA5 (CN10, pin 11) to Slave Board PA5 (CN10, pin 11) + - Connect Master board PA6 (CN10, pin 13) to Slave Board PA6 (CN10, pin 13) + - Connect Master board PA7 (CN10, pin 15) to Slave Board PA7 (CN10, pin 15) + - Connect Master board GND to Slave Board GND + +@par How to use it ? + +In order to make the program work, you must do the following: + - Open your preferred toolchain + - Rebuild all files (master project) and load your image into target memory + o Load the project in Master Board + - Rebuild all files (slave project) and load your image into target memory + o Load the project in Slave Board + - Run the example + + * <h3><center>© COPYRIGHT STMicroelectronics</center></h3> + */ +
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