MG32F10x Standard Peripherals Firmware Library
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*************** (C) COPYRIGHT 2020 - 2023 megawin Technology *************** * @file NVIC/NVIC_DMA_WFIMode/readme.txt * @author megawin Application Team * @version V0.1.10 * @date 05-January-2023 * @brief Description of the NVIC NVIC_DMA_WFIMode example. ****************************************************************************** * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE * TIME. AS A RESULT, MEGAWIN SHALL NOT BE HELD LIABLE FOR ANY DIRECT, * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM * THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. ******************************************************************************
This example describes how to wake up from this mode through the DMA transfer end interrupt,when DMA transfer is enabled and the system enters WFI mode.
In this example, Main clock is from PLL clock and it is configured at 96MHz. The PLL clock is based on 8MHz HSE. APB1 and APB2 clock is from Main clock.
Press the button (PB6) to make the core enter the WFI mode, and LED1 stops switching. To wake up from WFI mode, You must send the ASCII sequence (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) to UART1. DMAC transfers these bytes from the UART1 receiving data register to a predefined buffer, and then generates an interrupt, The system exits the WFI mode, and LED1 restarts to switch. If the correct sequence is received, LED2 is on, otherwise LED2 is off.
In order to make the program work, you must do the following :
Run the example