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diff --git a/Projects/NUCLEO-WB35CE/Examples_LL/LPUART/LPUART_WakeUpFromStop2_Init/readme.txt b/Projects/NUCLEO-WB35CE/Examples_LL/LPUART/LPUART_WakeUpFromStop2_Init/readme.txt new file mode 100644 index 000000000..fe495857d --- /dev/null +++ b/Projects/NUCLEO-WB35CE/Examples_LL/LPUART/LPUART_WakeUpFromStop2_Init/readme.txt @@ -0,0 +1,78 @@ +/** + @page LPUART_WakeUpFromStop2_Init LPUART example + + @verbatim + ****************************************************************************** + * @file Examples_LL/LPUART/LPUART_WakeUpFromStop2_Init/readme.txt + * @author MCD Application Team + * @brief Description of the LPUART_WakeUpFromStop2_Init LPUART 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 + +Configuration of GPIO and LPUART peripherals to allow characters +received on LPUART_RX pin to wake up the MCU from low-power mode. This example is based +on the LPUART LL API. The peripheral initialization uses LL +initialization function to demonstrate LL init usage. + +LPUART Peripheral is configured in asynchronous mode (9600 bauds, 8 data bit, 1 start bit, 1 stop bit, no parity). +No HW flow control is used. +LPUART Clock is based on HSI. + +Example execution: +After startup from reset and system configuration, LED2 is blinking quickly during 3 sec, +then MCU enters "Stop 2" mode (LED2 off). +On first character reception by the LPUART from PC Com port (ex: using HyperTerminal) +after "Stop 2" Mode period, MCU wakes up from "Stop 2" Mode. +Received character value is checked : +- On a specific value ('S' or 's'), LED2 is turned On and program ends. +- If different from 'S' or 's', program performs a quick LED2 blinks during 3 sec and + enters again "Stop 2" mode, waiting for next character to wake up. + +In case of errors, LED2 is slowly blinking (1 sec period). + +@par Directory contents + + - LPUART/LPUART_WakeUpFromStop2_Init/Inc/stm32wbxx_it.h Interrupt handlers header file + - LPUART/LPUART_WakeUpFromStop2_Init/Inc/main.h Header for main.c module + - LPUART/LPUART_WakeUpFromStop2_Init/Inc/stm32_assert.h Template file to include assert_failed function + - LPUART/LPUART_WakeUpFromStop2_Init/Src/stm32wbxx_it.c Interrupt handlers + - LPUART/LPUART_WakeUpFromStop2_Init/Src/main.c Main program + - LPUART/LPUART_WakeUpFromStop2_Init/Src/system_stm32wbxx.c STM32WBxx system source file + +@par Hardware and Software environment + + - This example runs on STM32WB35CEUx devices. + + - This example has been tested with NUCLEO-WB35CE board and can be + easily tailored to any other supported device and development board. + + - NUCLEO-WB35CE Set-up + - Connect STM32 MCU board LPUART1 TX pin (GPIO PA2 connected to pin 36 of CN7 connector) + to PC COM port RX signal + - Connect STM32 MCU board LPUART1 RX pin (GPIO PA3 connected to pin 38 of CN7 connector) + to PC COM port TX signal + - Connect STM32 MCU board GND to PC COM port GND signal + + - Launch serial communication SW on PC (as HyperTerminal or TeraTerm) with proper configuration + (9600 bauds, 8 bits data, 1 stop bit, no parity, no HW flow control). + +@par How to use it ? + +In order to make the program work, you must do the following : + - Open your preferred toolchain + - Rebuild all files and load your image into target memory + - Run the example + + * <h3><center>© COPYRIGHT STMicroelectronics</center></h3> + */ |