1.概述

本篇文章主要介紹如何使用e2studio對瑞薩進行Flash配置，并且分別對Code Flash & Data Flash進行讀寫操作。

Flash有Code Flash（儲存程序代碼）以及Data Flash（儲存一般數據），其中Code Flash主要以NOR型為主，儲存系統(tǒng)程序代碼及小量數據；而Data Flash則是以NAND型為主，用于儲存大量數據。

2.硬件準備

首先需要準備一個開發(fā)板，這里我準備的是芯片型號 R7FA2L1AB2DFL 的開發(fā)板。

3.新建工程

4.工程模板

5.保存工程路徑

6.芯片配置

本文中使用R7FA2L1AB2DFL來進行演示。

7

7.工程模板選擇

8.Flash配置

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

9.Flash屬性配置

10.設置E2STUDIO堆棧

11.e2studio的重定向printf設置

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

12.printf輸出重定向到串口

打印最常用的方法是printf，所以要解決的問題是將printf的輸出重定向到串口，然后通過串口將數據發(fā)送出去。

注意一定要加上頭文件#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()函數原型


故可以用R_FLASH_LP_Open ()函數進行初始化開啟初始化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()函數原型


故可以用R_FLASH_LP_Erase()函數進行擦除指定的代碼或數據閃存塊。

 /* 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()函數原型


故可以用R_FLASH_LP_StatusGet()函數對Code Flash或者Data Flash進行寫數據。

/* 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()函數對Code Flash或者Data Flash進行寫數據。

 /* 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()函數原型


對Data Flash進行寫操作時候，數據可以在后臺運行，故可以用R_FLASH_LP_StatusGet()函數查詢是否執(zhí)行完畢。

/* 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

對Code Flash進行讀寫操作時候，特別要注意寫的地址，因為如果寫的不對，會覆蓋到代碼區(qū)，造成運行錯誤，同時對于擦除，是一塊的數據都會直接擦除掉。

在RA2L1中，Code flash有2種規(guī)格，分別是128KB和256KB，每塊大小為2KB。

為了兼容其他的型號，向Block62種寫入數據并且讀取出來，地址范圍是0x0001F000 - 0x0001F800。

使用R_FLASH_LP_Write()寫入的時候，寫入的是字節(jié)為單位，故num_bytes為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

對Data Flash進行讀寫操作時候，特別要注意要等待Data Flash寫完才能進行后續(xù)讀寫操作。

在RA2L1中， Data flash都是8KB的，每塊大小為1KB 。

向Block0種寫入數據并且讀取出來，地址范圍是0x40100000 - 0x401003FF。

使用R_FLASH_LP_Write()寫入的時候，寫入的是字節(jié)為單位，故num_bytes為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寫入{0x1a,0x24,0x46,0x6a}和{0xaabbccdd,0x11111111,0x22222222,0x33333333,0x44444444}

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

通過串口打印出的結果如下所示。

內存地址查詢結果如下所示。

21.完整代碼

#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讀取打印程序*/
void PrintFlashTest(uint32_t L,uint32_t addr)
{
    uint32_t i=0;
    for(i=0;i;i++)>;i++)>

原創(chuàng)：By RA_Billy Xiao

---

原文標題：瑞薩e2studio----Code Flash&Data Flash讀寫

文章出處：【微信公眾號：RA生態(tài)工作室】歡迎添加關注！文章轉載請注明出處。