瑞萨e2studio----Code Flash/Data Flash读写

1.概述

本篇文章主要介绍如何使用e2studio对瑞萨进行Flash配置，并且分别对Code Flash & Data Flash进行读写操作。

Flash有Code Flash（储存程序代码）以及Data Flash（储存一般数据），其中Code Flash主要以NOR型为主，储存系统程序代码及小量数据；而Data Flash则是以NAND型为主，用于储存大量数据。

2.硬件准备

首先需要准备一个开发板，这里我准备的是芯片型号 R7FA2L1AB2DFL 的开发板。

3.新建工程

4.工程模板

5.保存工程路径

6.芯片配置

本文中使用R7FA2L1AB2DFL来进行演示。

7

7.工程模板选择

8.Flash配置

点击 Stacks -> New Stack -> Driver -> Storage -> Flash Driver on r_flash_lp。

9.Flash属性配置

10.设置E2STUDIO堆栈

11.e2studio的重定向printf设置

C++ 构建->设置->GNU ARM Cross C Linker->Miscellaneous去掉Other linker flags中的 “--specs=rdimon.specs”

12.printf输出重定向到串口

打印最常用的方法是printf，所以要解决的问题是将printf的输出重定向到串口，然后通过串口将数据发送出去。

注意一定要加上头文件#include

#ifdef __GNUC__                                 //串口重定向
    #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
    #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif

PUTCHAR_PROTOTYPE
{
        err = R_SCI_UART_Write(&g_uart0_ctrl, (uint8_t *)&ch, 1);
        if(FSP_SUCCESS != err) __BKPT();
        while(uart_send_complete_flag == false){}
        uart_send_complete_flag = false;
        return ch;
}

int _write(int fd,char *pBuffer,int size)
{
    for(int i=0;i;i++)>

13.R_FLASH_LP_Open()函数原型


故可以用R_FLASH_LP_Open ()函数进行初始化开启初始化Flash。

 /* Open the flash lp instance. */
     fsp_err_t err = R_FLASH_LP_Open(&g_flash0_ctrl, &g_flash0_cfg);
    assert(FSP_SUCCESS == err);

14.R_FLASH_LP_Erase()函数原型


故可以用R_FLASH_LP_Erase()函数进行擦除指定的代码或数据闪存块。

 /* Erase 1 block of code flash starting at block 62. */
    err = R_FLASH_LP_Erase(&g_flash0_ctrl, FLASH_CF_BLOCK_62, 1);
    assert(FSP_SUCCESS == err);

15.R_FLASH_LP_StatusGet()函数原型


故可以用R_FLASH_LP_StatusGet()函数对Code Flash或者Data Flash进行写数据。

/* Write 32 bytes to the first block of data flash. */
    err = R_FLASH_LP_Write(&g_flash0_ctrl, (uint32_t) g_src_uint8, FLASH_CF_BLOCK_62, g_src_uint8_length);
    assert(FSP_SUCCESS == err);

16.R_FLASH_L

故可以用R_FLASH_LP_Write()函数对Code Flash或者Data Flash进行写数据。

 /* Write 32 bytes to the first block of data flash. */
    err = R_FLASH_LP_Write(&g_flash0_ctrl, (uint32_t) g_src_uint8, FLASH_CF_BLOCK_62, g_src_uint8_length);
    assert(FSP_SUCCESS == err);

17.R_FLASH_LP_StatusGet()函数原型


对Data Flash进行写操作时候，数据可以在后台运行，故可以用R_FLASH_LP_StatusGet()函数查询是否执行完毕。

/* Wait until the current flash operation completes. */
    do
    {
        err = R_FLASH_LP_StatusGet(&g_flash0_ctrl, &status);
    } while ((FSP_SUCCESS == err) && (FLASH_STATUS_BUSY == status));

18.Code Flash

对Code Flash进行读写操作时候，特别要注意写的地址，因为如果写的不对，会覆盖到代码区，造成运行错误，同时对于擦除，是一块的数据都会直接擦除掉。

在RA2L1中，Code flash有2种规格，分别是128KB和256KB，每块大小为2KB。

为了兼容其他的型号，向Block62种写入数据并且读取出来，地址范围是0x0001F000 - 0x0001F800。

使用R_FLASH_LP_Write()写入的时候，写入的是字节为单位，故num_bytes为g_src_uint8_length*1；

#define FLASH_CF_BLOCK_62               0x0001F000U /*   2 KB: 0x0001F000 - 0x0001F800 */
volatile uint8_t g_src_uint8[4]={0x1a,0x24,0x46,0x6a};
volatile uint8_t  g_src_uint8_length=4;
 /* Write 32 bytes to the first block of data flash. */
    err = R_FLASH_LP_Write(&g_flash0_ctrl, (uint32_t) g_src_uint8, FLASH_CF_BLOCK_62, g_src_uint8_length);
    assert(FSP_SUCCESS == err);
    assert(0 == memcmp(g_src_uint8, (uint8_t *) FLASH_CF_BLOCK_62, g_src_uint8_length));

19.Data Flash

对Data Flash进行读写操作时候，特别要注意要等待Data Flash写完才能进行后续读写操作。

在RA2L1中， Data flash都是8KB的，每块大小为1KB 。

向Block0种写入数据并且读取出来，地址范围是0x40100000 - 0x401003FF。

使用R_FLASH_LP_Write()写入的时候，写入的是字节为单位，故num_bytes为g_src_uint8_length*1；

#define FLASH_DF_BLOCK_0               0x40100000U  /*   1 KB: 0x40100000 - 0x401003FF */
volatile uint8_t g_src_uint8[4]={0x1a,0x24,0x46,0x6a};
volatile uint8_t  g_src_uint8_length=4;
flash_status_t status;
/* Write 32 bytes to the first block of data flash. */
err = R_FLASH_LP_Write(&g_flash0_ctrl, (uint32_t) g_src_uint8, FLASH_DF_BLOCK_0, g_src_uint8_length);
assert(FSP_SUCCESS == err);
/* Wait until the current flash operation completes. */
do
{
err = R_FLASH_LP_StatusGet(&g_flash0_ctrl, &status);
} while ((FSP_SUCCESS == err) && (FLASH_STATUS_BUSY == status));

20.演示效果

向Data Flash地址0x40100000写入{0x1a,0x24,0x46,0x6a}和{0xaabbccdd,0x11111111,0x22222222,0x33333333,0x44444444}

向Code Flash地址0x0001F000写入{0x1a,0x24,0x46,0x6a}和{0xaabbccdd,0x11111111,0x22222222,0x33333333,0x44444444}

通过串口打印出的结果如下所示。

内存地址查询结果如下所示。

21.完整代码

#include "hal_data.h"
#include 
FSP_CPP_HEADER
void R_BSP_WarmStart(bsp_warm_start_event_t event);
FSP_CPP_FOOTER

fsp_err_t err = FSP_SUCCESS;
volatile bool uart_send_complete_flag = false;
void user_uart_callback (uart_callback_args_t * p_args)
{
    if(p_args->event == UART_EVENT_TX_COMPLETE)
    {
        uart_send_complete_flag = true;
    }
}
#ifdef __GNUC__                                 //串口重定向
    #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
    #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif
PUTCHAR_PROTOTYPE
{
        err = R_SCI_UART_Write(&g_uart0_ctrl, (uint8_t *)&ch, 1);
        if(FSP_SUCCESS != err) __BKPT();
        while(uart_send_complete_flag == false){}
        uart_send_complete_flag = false;
        return ch;
}
int _write(int fd,char *pBuffer,int size)
{
    for(int i=0;ievent;
}

#define FLASH_DF_BLOCK_0               0x40100000U  /*   1 KB: 0x40100000 - 0x401003FF */
#define FLASH_CF_BLOCK_62               0x0001F000U /*   2 KB: 0x0001F000 - 0x0001F800 */
/*******************************************************************************************************************//**
 * main() is generated by the RA Configuration editor and is used to generate threads if an RTOS is used.  This function
 * is called by main() when no RTOS is used.
 **********************************************************************************************************************/
void hal_entry(void)
{
    /* TODO: add your own code here */
    err = R_SCI_UART_Open(&g_uart0_ctrl, &g_uart0_cfg);
    assert(FSP_SUCCESS == err);
    volatile uint8_t  g_src_uint8_length=4;
    volatile uint8_t g_src_uint8[4]={0x1a,0x24,0x46,0x6a};
    volatile uint8_t  g_src_uint32_length=5;
    volatile uint32_t g_src_uint32[5]={
    0xaabbccdd,0x11111111,0x22222222,0x33333333,0x44444444
    };
    /********************code flash*******************************/
    flash_result_t blank_check_result;
    /* Open the flash lp instance. */
     fsp_err_t err = R_FLASH_LP_Open(&g_flash0_ctrl, &g_flash0_cfg);
    assert(FSP_SUCCESS == err);
     /* Disable interrupts to prevent vector table access while code flash is in P/E mode. */
    __disable_irq();
    /* Erase 1 block of code flash starting at block 62. */
    err = R_FLASH_LP_Erase(&g_flash0_ctrl, FLASH_CF_BLOCK_62, 1);
    assert(FSP_SUCCESS == err);
    /* Write 32 bytes to the first block of data flash. */
    err = R_FLASH_LP_Write(&g_flash0_ctrl, (uint32_t) g_src_uint8, FLASH_CF_BLOCK_62, g_src_uint8_length);
    assert(FSP_SUCCESS == err);
    assert(0 == memcmp(g_src_uint8, (uint8_t *) FLASH_CF_BLOCK_62, g_src_uint8_length));
    err = R_FLASH_LP_Write(&g_flash0_ctrl, (uint32_t) g_src_uint32, FLASH_CF_BLOCK_62+g_src_uint8_length*1, g_src_uint32_length*4);
    assert(FSP_SUCCESS == err);
    assert(0 == memcmp(g_src_uint32, (uint8_t *) FLASH_CF_BLOCK_62+g_src_uint8_length*1, g_src_uint32_length*4));
    /* Enable interrupts after code flash operations are complete. */
    __enable_irq();
    printf("\n/********************code flash*******************************/\n");
    PrintFlashTest(6,FLASH_CF_BLOCK_62);
    /********************data flash*******************************/
    interrupt_called = false;
    /* Erase 1 block of data flash starting at block 0. */
    err = R_FLASH_LP_Erase(&g_flash0_ctrl, FLASH_DF_BLOCK_0, 1);
    assert(FSP_SUCCESS == err);
    while (!interrupt_called)
    {
    ;
    }
    assert(FLASH_EVENT_ERASE_COMPLETE == flash_event);
    interrupt_called = false;
    flash_status_t status;
    /* Write 32 bytes to the first block of data flash. */
    err = R_FLASH_LP_Write(&g_flash0_ctrl, (uint32_t) g_src_uint8, FLASH_DF_BLOCK_0, g_src_uint8_length);
    assert(FSP_SUCCESS == err);

    /* Wait until the current flash operation completes. */
    do
    {
        err = R_FLASH_LP_StatusGet(&g_flash0_ctrl, &status);
    } while ((FSP_SUCCESS == err) && (FLASH_STATUS_BUSY == status));

    err = R_FLASH_LP_Write(&g_flash0_ctrl, (uint32_t) g_src_uint32, FLASH_DF_BLOCK_0+g_src_uint8_length*1, g_src_uint32_length*4);
    assert(FSP_SUCCESS == err);
    /* Wait until the current flash operation completes. */
    do
    {
        err = R_FLASH_LP_StatusGet(&g_flash0_ctrl, &status);
    } while ((FSP_SUCCESS == err) && (FLASH_STATUS_BUSY == status));

    /* If the interrupt wasn't called process the error. */
    assert(interrupt_called);
    /* If the event wasn't a write complete process the error. */
    assert(FLASH_EVENT_WRITE_COMPLETE == flash_event);
    /* Verify the data was written correctly. */
    assert(0 == memcmp(g_src_uint8, (uint8_t *) FLASH_DF_BLOCK_0, g_src_uint8_length));
    assert(0 == memcmp(g_src_uint32, (uint8_t *) FLASH_DF_BLOCK_0+g_src_uint8_length*1, g_src_uint32_length*4));
    printf("\n/********************data flash*******************************/\n");
    PrintFlashTest(6,FLASH_DF_BLOCK_0);
    while(1)
    {
        R_BSP_SoftwareDelay(1000, BSP_DELAY_UNITS_MILLISECONDS); // NOLINT100->160
    }
#if BSP_TZ_SECURE_BUILD
    /* Enter non-secure code */
    R_BSP_NonSecureEnter();
#endif
}
/*FLASH读取打印程序*/
void PrintFlashTest(uint32_t L,uint32_t addr)
{
    uint32_t i=0;
    for(i=0;i;i++)>;i++)>

原创：By RA_Billy Xiao

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原文标题：瑞萨e2studio----Code Flash&Data Flash读写

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