137 lines
4.1 KiB
C
137 lines
4.1 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : main.c
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* Author : WCH
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* Version : V1.0.1
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* Date : 2025/04/26
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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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* when LV is not enabled in standby mode, RAM 2k and 30K data holding routines:
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* This routine demonstrates writing data at the specified location of 2K RAM and 30K RAM(Applicable to
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* CH32V20x_D8 and CH32V20x_D8W,CH32V20x_D6 has a 20K RAM data holding option),then WFI enters STANDBY
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* sleep mode, through the PA0 (wakeup) pin Input high level to exit standby mode, print RAM data after
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* waking up, and test whether RAM is maintained data.
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*
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*/
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#include "debug.h"
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/* Global define */
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/* Global Variable */
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/*********************************************************************
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* @fn TestDataWrite
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*
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* @brief Write data to certain address of 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 myAddr=0x20000000+10*1024;
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uint32_t myAddr2=0x20000000+1*1024+512;
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uint32_t i=0;
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for(i=0;i<1024;i++)//Write 30K RAM
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{
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*(uint32_t volatile *)(myAddr+(i<<2)) = 0x33333333;
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}
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for(i=0;i<1024;i++)//Check 30K RAM
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{
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if((*(uint32_t volatile *)(myAddr+(i<<2))) != 0x33333333)
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{
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printf("Write 30K RAM Error!\r\n");
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break;
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}
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}
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printf("Write 30K RAM Successfully!\r\n");
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for(i=0;i<10;i++)//Write 2K RAM
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{
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*(uint32_t volatile *)(myAddr2+(i<<2)) = 0x33333333;
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}
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for(i=0;i<10;i++)//Check 2K RAM
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{
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if((*(uint32_t volatile *)(myAddr2+(i<<2))) != 0x33333333)
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{
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printf("Write 2K RAM Error!\r\n");
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break;
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}
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}
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printf("Write 2K 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 Print the data of certain address of 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 myAddr=0x20000000+10*1024;
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uint32_t myAddr2=0x20000000+1*1024+512;
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uint32_t i=0;
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printf("2K RAM:\r\n");
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for(i=0;i<10;i++)
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{
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printf("0x%08lx=0x%08lx\r\n",myAddr2+(i<<2),*(uint32_t volatile *)(myAddr2+(i<<2)));
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}
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printf("32K RAM:\r\n");
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for(i=0;i<1024;i++)
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{
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printf("0x%08lx=0x%08lx\r\n",myAddr+(i<<2),*(uint32_t volatile *)(myAddr+(i<<2)));
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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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NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
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SystemCoreClockUpdate();
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Delay_Init();
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Delay_Ms(1000);
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/* To reduce power consumption, unused GPIOs need to be set as pull-down inputs */
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|
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RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);
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GPIO_PinRemapConfig(GPIO_Remap_SWJ_Disable,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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USART_Printf_Init(115200);
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printf("SystemClk:%d\r\n", SystemCoreClock);
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printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() );
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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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printf("Standby RAM Mode Test\r\n");
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TestDataWrite();
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PWR_WakeUpPinCmd(ENABLE);
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PWR_EnterSTANDBYMode_RAM();
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while(1);
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}
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