ch32v20x-examples/EVT/EXAM/FLASH/FLASH_Program/User/main.c

/********************************** (C) COPYRIGHT *******************************
 * File Name          : main.c
 * Author             : WCH
 * Version            : V1.0.1
 * Date               : 2026/05/22
 * Description        : Main program body.
 *********************************************************************************
 * Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
 * Attention: This software (modified or not) and binary are used for 
 * microcontroller manufactured by Nanjing Qinheng Microelectronics.
 *******************************************************************************/

/*
 *@Note
 *FLASH erase/read/write, and fast programming:
 *    Includes Standard Erase and Program, Fast Erase and Program.
 *
 *
 *    a-Erase successful part read non-0xFF:
 *                    Word reading--0xe339e339
 *            Half-word reading--0xe339
 *                       byte read--0x39
 *            Even address byte read--0x39
 *            Odd address byte read--0xe3
 *    b-When If the actual application must require the use of the system with a frequency greater than 120M,
 *            attention should be paid to:
 *            In non-zero wait area FLASH and zero wait area FLASH, user word read and write, manufacturer 
 *            configuration word and Boot area read, you need to do the following operations. Firstly, divide 
 *            the frequency of HCLK by 2 (the related peripheral clocks are also divided at the same time, and 
 *            the impact needs to be evaluated). After the FLASH operation is completed, restore it to ensure 
 *            the FLASH access clock The frequency does not exceed 60Mhz (bit[25]-SCKMOD of the FLASH_CTLR register 
 *            can configure the FLASH access clock frequency to be the system clock or half of the system clock, 
 *            and this bit is configured as half of the system clock by default).
 *
 */

#include "debug.h"

/* Global define */
typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus;
#define PAGE_WRITE_START_ADDR  ((uint32_t)0x08008000) /* Start from 32K */
#define PAGE_WRITE_END_ADDR    ((uint32_t)0x08009000) /* End at 36K */
#define FLASH_PAGE_SIZE                   4096
#define FLASH_PAGES_TO_BE_PROTECTED FLASH_WRProt_Pages60to63

/* Fast Mode define */
#define FAST_FLASH_PROGRAM_START_ADDR  ((uint32_t)0x08008000)
#define FAST_FLASH_PROGRAM_END_ADDR  ((uint32_t)0x08010000)
#define FAST_FLASH_SIZE  (64*1024)

/* Global Variable */
volatile uint32_t EraseCounter = 0x0, Address = 0x0;
uint16_t Data = 0xAAAA;
uint32_t WRPR_Value = 0xFFFFFFFF, ProtectedPages = 0x0;
uint32_t NbrOfPage;
volatile FLASH_Status FLASHStatus = FLASH_COMPLETE;
volatile TestStatus MemoryProgramStatus = PASSED;
volatile TestStatus MemoryEraseStatus = PASSED;

#define Fadr    (0x08020000)
#define Fsize   ((((256*4))>>2))
u32 buf[Fsize];

/*********************************************************************
 * @fn      Flash_Test
 *
 * @brief   Flash Program Test.
 *
 * @return  none
 */
void Flash_Test(void)
{
    printf("FLASH Test\n");

    FLASH_Unlock();

    NbrOfPage = (PAGE_WRITE_END_ADDR - PAGE_WRITE_START_ADDR) / FLASH_PAGE_SIZE;

    FLASH_ClearFlag( FLASH_FLAG_EOP |FLASH_FLAG_WRPRTERR);

    for(EraseCounter = 0; (EraseCounter < NbrOfPage) && (FLASHStatus == FLASH_COMPLETE); EraseCounter++)
    {
      FLASHStatus = FLASH_ErasePage(PAGE_WRITE_START_ADDR + (FLASH_PAGE_SIZE * EraseCounter));  //Erase 4KB

      if(FLASHStatus != FLASH_COMPLETE)
      {
        printf("FLASH Erase Fail\r\n");
        return;
      }
      printf("FLASH Erase Suc\r\n");
    }

    Address = PAGE_WRITE_START_ADDR;
    printf("Programing...\r\n");
    while((Address < PAGE_WRITE_END_ADDR) && (FLASHStatus == FLASH_COMPLETE))
    {
      FLASHStatus = FLASH_ProgramHalfWord(Address, Data);
      Address = Address + 2;
    }

    Address = PAGE_WRITE_START_ADDR;

    printf("Program Cheking...\r\n");
    while((Address < PAGE_WRITE_END_ADDR) && (MemoryProgramStatus != FAILED))
    {
      if((*(__IO uint16_t*) Address) != Data)
      {
        MemoryProgramStatus = FAILED;
      }
      Address += 2;
    }

    if(MemoryProgramStatus == FAILED)
    {
       printf("Memory Program FAIL!\r\n");
    }
    else
    {
       printf("Memory Program PASS!\r\n");
    }

    FLASH_Lock();
}

/*********************************************************************
 * @fn      Flash_Test_Fast
 *
 * @brief   Flash Fast Program Test.
 *
 * @return  none
 */
void Flash_Test_Fast(void)
{
    u32 i;
    u8 Verify_Flag = 0;
    FLASH_Status s;

    for(i = 0; i < Fsize; i++){
        buf[i] = i;
    }

    printf("Read flash\r\n");
    for(i=0; i<Fsize; i++){
        printf("adr-%08x v-%08x\r\n", Fadr +4*i, *(u32*)(Fadr +4*i));
    }

    s = FLASH_ROM_ERASE(Fadr, Fsize*4);
    if(s != FLASH_COMPLETE)
    {
        printf("check FLASH_ADR_RANGE_ERROR FLASH_ALIGN_ERROR or FLASH_OP_RANGE_ERROR\r\n");
        return;
    }

    printf("Erase flash\r\n");
    for(i=0; i<Fsize; i++){
        printf("adr-%08x v-%08x\r\n", Fadr +4*i, *(u32*)(Fadr +4*i));
    }

    s = FLASH_ROM_WRITE(Fadr,  buf, Fsize*4);
    if(s != FLASH_COMPLETE)
    {
        printf("check FLASH_ADR_RANGE_ERROR FLASH_ALIGN_ERROR or FLASH_OP_RANGE_ERROR\r\n");
        return;
    }

    printf("Write flash\r\n");
    for(i=0; i<Fsize; i++){
        printf("adr-%08x v-%08x\r\n", Fadr +4*i, *(u32*)(Fadr +4*i));
    }

    for(i = 0; i < Fsize; i++){
        if(buf[i] == *(u32 *)(Fadr + 4 * i))
        {
            Verify_Flag = 0;
        }
        else
        {
            Verify_Flag = 1;
            break;
        }
    }

    if(Verify_Flag)
        printf("%d Byte Verify Fail\r\n", (Fsize*4));
    else
        printf("%d Byte Verify Suc\r\n", (Fsize*4));
}

/*********************************************************************
 * @fn      main
 *
 * @brief   Main program.
 *
 * @return  none
 */
int main(void)
{
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
	SystemCoreClockUpdate();
	Delay_Init();
	USART_Printf_Init(115200);
	printf("SystemClk:%d\r\n",SystemCoreClock);
	printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() );
	printf("Flash Program Test\r\n");

	Flash_Test();
	Flash_Test_Fast();

	while(1);
}