Renesas R7FA8D1BH (Cortex®-M85) Data Flash程序功能实现

概述

1 Data Flash空间

2 FSP配置参数

3 源代码介绍

3.1 源代码

3.2 中断函数

3.3 源代码文件

4 测试

4.1 测试实现

4.2 测试

概述

本文主要介绍使用FSP提供的库函数操作Renesas R7FA8D1BH (Cortex®-M85) Data Flash的方法，笔者使用FSP配置参数，并生成工程文件，然后实现测试函数，以验证操作Flash的功能。

1 Data Flash空间

Renesas R7FA8D1BH (Cortex®-M85) Data Flash的数据快闪存储器的数据区被划分为64字节块，每个字节块作为一个擦除单元。数据闪存的映射关系如下图所示：

2 FSP配置参数

1）使用FSP创建Stack

2) 配置Stack的参数

3 源代码介绍

3.1 源代码

1）应用函数代码

代码118行：打开Flash操作端口

代码122行：擦除Flash

代码127行：判断是否查出完成

代码134行：检查擦除Flash空间的是否完成

代码144：写数据

代码149行：读取数据

3.2 中断函数

代码14~22行：定义中断函数中使用的变量

代码25~51行：判断中断状态

3.3 源代码文件

创建 bsp_vm_flash.c文件，编写如下代码

 /*FILE NAME  :  bsp_vm_flash.cDescription:  vm flash interfaceAuthor     :  tangmingfei2013@126.comDate       :  2024/09/22*/
#include <string.h>
#include <stdio.h>
#include <stdbool.h>
#include "r_ospi_b.h"
#include "bsp_vm_flash.h"
#include "hal_data.h"bool               interrupt_called;
flash_event_t      flash_event;volatile bool flash_erase_complete_flag = false;
volatile bool flash_write_complete_flag = false;
volatile bool flash_event_not_blank = false;
volatile bool flash_event_blank = false;
volatile bool flash_event_error = false;
volatile flash_event_t flash_event_error_type;void g_flash_callBack (flash_callback_args_t * p_args)
{interrupt_called = true;flash_event      = p_args->event;if (FLASH_EVENT_ERASE_COMPLETE == flash_event){flash_erase_complete_flag = true;}else if (FLASH_EVENT_WRITE_COMPLETE == flash_event){flash_write_complete_flag = true;}else if (FLASH_EVENT_BLANK == flash_event){flash_event_blank = true;}else if (FLASH_EVENT_NOT_BLANK == flash_event){flash_event_not_blank = true;}else{flash_event_error = true;flash_event_error_type = flash_event;}
}#if 1#define FLASH_DF_BLOCK                     0x27000000  /*   64 B:  0x27000000 - 0x2700004F */
#define FLASH_DATA_BLOCK_SIZE              64
#define FLASH_HP_EXAMPLE_WRITE_SIZE        64#define  TRANSFER_LENGTH                   256uint8_t        g_dest[TRANSFER_LENGTH];
uint8_t        g_src[TRANSFER_LENGTH];
flash_result_t blank_check_result;void r_flash_hp_basic_test(void)
{/* Initialize p_src to known data */for (uint32_t i = 0; i < TRANSFER_LENGTH; i++){g_src[i] = (uint8_t) ('A' + (i % 26));}/* Open the flash hp instance. */fsp_err_t err = R_FLASH_HP_Open(&g_flash_ctrl, &g_flash_cfg);assert(FSP_SUCCESS == err);/* Erase 1 block of data flash starting at block 0. */err = R_FLASH_HP_Erase(&g_flash_ctrl, FLASH_DF_BLOCK, 1);assert(FSP_SUCCESS == err);if (true == g_flash_cfg.data_flash_bgo){while (!flash_erase_complete_flag);flash_erase_complete_flag = false;}memcpy( g_dest, FLASH_DF_BLOCK, FLASH_HP_EXAMPLE_WRITE_SIZE);/* Check if block 0 is erased. */err = R_FLASH_HP_BlankCheck(&g_flash_ctrl, FLASH_DF_BLOCK, FLASH_DATA_BLOCK_SIZE, &blank_check_result);assert(FSP_SUCCESS == err);/* Verify the previously erased area is blank *///assert(FLASH_RESULT_BLANK == blank_check_result);/* Write 32 bytes to the first block of data flash. */err = R_FLASH_HP_Write(&g_flash_ctrl, (uint32_t) g_src, FLASH_DF_BLOCK, FLASH_HP_EXAMPLE_WRITE_SIZE);assert(FSP_SUCCESS == err);memcpy( g_dest, FLASH_DF_BLOCK, FLASH_HP_EXAMPLE_WRITE_SIZE);assert(0 == memcmp(g_src, (uint8_t *) FLASH_DF_BLOCK, FLASH_HP_EXAMPLE_WRITE_SIZE));}#endif

4 测试

4.1 测试实现

功能介绍：

1）选取BLOCK_0: 0x27000000 /* 64 B: 0x27000000 - 0x2700004F */

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2) 在该区间写入如下数据：

/* Initialize p_src to known data */
for (uint32_t i = 0; i < TRANSFER_LENGTH; i++)
{
g_src[i] = (uint8_t) ('A' + (i % 26));
}

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3）比较数据

准备数据