瑞萨e2studio(15)----Code Flash&Data Flash读写
瑞萨e2studio.15--Code Flash&Data Flash读写
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。
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：
新建工程
工程模板
保存工程路径
芯片配置
本文中使用R7FA2L1AB2DFL来进行演示。
工程模板选择
FLASH配置
点击Stacks->New Stack->Driver->Storage -> Flash Driver on r_flash_lp。
FLASH属性配置
设置e2studio堆栈
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”
uart配置
点击Stacks->New Stack->Driver->Connectivity -> UART Driver on r_sci_uart。
uart属性配置
配置串口，用于打印数据。
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 <stdio.h>
#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<size;i++)
{
__io_putchar(*pBuffer++);
}
return size;
}
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);
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);
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);
R_FLASH_LP_Write()函数原型
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);
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));
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));
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));
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。
完整代码
#include "hal_data.h"
#include <stdio.h>
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;i<size;i++)
{
__io_putchar(*pBuffer++);
}
return size;
}
void PrintFlashTest(uint32_t L,uint32_t addr);
volatile bool interrupt_called;
volatile flash_event_t flash_event;
void flash_callback (flash_callback_args_t * p_args)
{
interrupt_called = true;
flash_event = p_args->event;
}
#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<L;i++)
{
printf("addr is:0x%x, data is:0x%x\n", addr+i*4, *(__IO uint32_t*)(addr+i*4));
}
}
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