148 lines
4.5 KiB
C
148 lines
4.5 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : main.c
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* Author : WCH
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* Version : V1.0.0
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* Date : 2024/07/09
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* Description : Main program body.
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*********************************************************************************
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* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
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* Attention: This software (modified or not) and binary are used for
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* microcontroller manufactured by Nanjing Qinheng Microelectronics.
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*******************************************************************************/
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/*
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*@Note
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* In STANDBY mode, 2K bytes RAM and 30K bytes RAM data holding routines:
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* Address range of 2K bytes RAM data holding: 0x20000000 ¡ª 0x20000000+2K .
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* Address range of 30K bytes RAM data holding: 0x20000000+2K ¡ª 0x20000000+2K+30K .
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* This example demonstrates the RAM data holding in standby mode (chip VDD power supply or VBAT power
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* supply,and RAM work at different voltages). Write data to 2K RAM and 30K RAM respectively, then
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* execute WFI to enter STANDBY mode, exit STANDBY mode by inputting a high level to the PA0 (wake-up)
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* pin, print RAM data after waking up, and test whether RAM retains data. This routine supports
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* CH32V20x_D8-CH32V203RB CH32V20x_D8W-CH32V208x,If you have requirements for other products,you need
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* to modify the Link.ld file.
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*/
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#include "debug.h"
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#define KEEP_2kRAM __attribute__((section(".keep_2kram"))) //Address space for 2K bytes of RAM.
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#define KEEP_30kRAM __attribute__((section(".keep_30kram"))) //Address space for 30K bytes of RAM.
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/* Power supply mode definition */
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#define VDD_POWER_MODE 0
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#define VBAT_POWER_MODE 1
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#define POWER_MODE VDD_POWER_MODE
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/* RAM low voltage working mode definition */
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#define RAMLV 0
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/* Global Variable */
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KEEP_2kRAM u32 DataBuf0[256];
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KEEP_30kRAM u32 DataBuf1[1024];
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/*********************************************************************
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* @fn TestDataWrite
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*
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* @brief Write data in 2K RAM and 30K RAM.
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*
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* @return none
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*/
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void TestDataWrite(void)
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{
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uint32_t i=0;
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/* Write data in 2K RAM */
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for( i=0; i<256; i++ )
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{
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DataBuf0[i] = 0x22222222;
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}
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printf("Write data in 2K RAM Successfully!\r\n");
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/* Write data in 30K RAM */
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for( i=0; i<1024; i++ )
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{
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DataBuf1[i] = 0x33333333;
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}
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printf("Write data in 30K RAM Successfully!\r\n");
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}
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/*********************************************************************
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* @fn TestDataRead
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*
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* @brief Read data written in 2K RAM and 30K RAM.
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*
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* @return none
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*/
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void TestDataRead(void)
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{
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uint32_t i=0;
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printf("Read data in 2K RAM:\r\n");
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for( i=0; i<256; i++ )
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{
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printf("DataBuf0#%d = 0x%08lx\r\n",i,DataBuf0[i]);
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}
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printf("Read data in 30K RAM:\r\n");
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for( i=0; i<1024; i++ )
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{
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printf("DataBuf1#%d = 0x%08lx\r\n",i,DataBuf1[i]);
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}
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}
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/*********************************************************************
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* @fn main
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*
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* @brief Main program.
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*
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* @return none
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*/
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int main(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure={0};
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SystemCoreClockUpdate();
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/* Configure unused GPIO as IPD to reduce power consumption */
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC |
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RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE, ENABLE);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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GPIO_Init(GPIOB, &GPIO_InitStructure);
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GPIO_Init(GPIOC, &GPIO_InitStructure);
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GPIO_Init(GPIOD, &GPIO_InitStructure);
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GPIO_Init(GPIOE, &GPIO_InitStructure);
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NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
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Delay_Init();
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USART_Printf_Init(115200);
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
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/* Delay 1.5s to avoid entering low power mode immediately after reset*/
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Delay_Ms(1500);
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TestDataRead();
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TestDataWrite();
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PWR_WakeUpPinCmd(ENABLE);
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#if(POWER_MODE == VDD_POWER_MODE)
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#if RAMLV
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printf("\r\n***Start RAM_LV Data Hold Test \r\n");
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PWR_EnterSTANDBYMode_RAM_LV();
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#else
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printf("\r\n***Start RAM Data Hold Test \r\n");
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PWR_EnterSTANDBYMode_RAM();
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#endif
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#elif(POWER_MODE == VBAT_POWER_MODE)
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#if RAMLV
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printf("\r\n***Start VBAT_EN RAM_LV Data Hold Test \r\n");
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PWR_EnterSTANDBYMode_RAM_LV_VBAT_EN();
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#else
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printf("\r\n***Start VBAT_EN RAM Data Hold Test \r\n");
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PWR_EnterSTANDBYMode_RAM_VBAT_EN();
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#endif
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#endif
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while(1);
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}
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