M0有 4K DATAFLASH，可以当做1K 32Bit EEPROM用，非常方便！
前几天说共享，说到要做到，呵呵，现将资料整理一下上传，可以不用再外扩EEPROM了，谁用谁知道。注意在用DATA FLASH前，请先将DATA FLASH使能，要不然没办法存数据进去。
设置见截图：
运行图片：
源码：- #include <stdio.h>
- #include "NUC1xx.h"
- #include "Driver\DrvSYS.h"
- #include "Driver\DrvGPIO.h"
- #include "Driver\DrvUART.h"
- #include "Driver\DrvFMC.h"
- uint32_t temp1,temp2,temp3;
- #define DATA_Flash_Start_ADD 0x0001F000
- #define PAGE_SIZE 128 //512 byte
- void DATA_FLASH_Write(uint32_t add,uint32_t data);
- uint32_t DATA_FLASH_Read(uint32_t add);
- //============================================================================
- // DATA FLASH当做EEPROM用。4k 8BIT当做1K 32位用，这样读写更方便！---烈火狂龙
- // u32addr : 0-1024 写入地址
- // u32data : 0-0xFFFFFFFF 写入数据
- //============================================================================
- void DATA_FLASH_Write(uint32_t u32addr,uint32_t u32data)
- {
- uint32_t data_buff[128]={0};
- uint32_t i=0;
- __set_PRIMASK(1);//关闭全局中断,不关中断就等着出错吧，呵呵。
- UNLOCKREG();
- DrvFMC_EnableISP();
- for(i=0;i<AGE_SIZE;i++)
- DrvFMC_Read(DATA_Flash_Start_ADD+i*4+ u32addr/128*512, &data_buff);//读出一页
- DrvFMC_Erase(DATA_Flash_Start_ADD+u32addr/128*512);//擦除一页
- data_buff[u32addr%128]=u32data; //修改要写入的数据
- for(i=0; i<AGE_SIZE; i++) //写入数据
- DrvFMC_Write(DATA_Flash_Start_ADD+i*4+ u32addr/128*512, data_buff);
- DrvFMC_DisableISP();
- LOCKREG();
- __set_PRIMASK(0);//打开全局中断
- }
- //============================================================================
- // u32addr : 0-1024 读取地址
- //============================================================================
- uint32_t DATA_FLASH_Read(uint32_t u32add)
- {
- uint32_t u32data;
- __set_PRIMASK(1);//关闭全局中断,不关中断就等着出错吧，呵呵。
- UNLOCKREG();
- DrvFMC_EnableISP();
- DrvFMC_Read(u32add*4+DATA_Flash_Start_ADD, &u32data);
- DrvFMC_DisableISP();
- LOCKREG();
- __set_PRIMASK(0);//打开全局中断
- return u32data;
- }
- //============================================================================
- // 主程序
- //============================================================================
- int32_t main (void)
- {
- STR_UART_T sParam;
- /* Unlock the protected registers */
- UNLOCKREG();
- /* Enable the 12MHz oscillator oscillation */
- DrvSYS_SetOscCtrl(E_SYS_XTL12M, 1);
- /* Waiting for 12M Xtal stalble */
- DrvSYS_Delay(5000);
- /* HCLK clock source. 0: external 12MHz; 4:internal 22MHz RC oscillator */
- DrvSYS_SelectHCLKSource(0);
- /*lock the protected registers */
- LOCKREG();
- DrvSYS_SetClockDivider(E_SYS_HCLK_DIV, 0); /* HCLK clock frequency = HCLK clock source / (HCLK_N + 1) */
- /* Set UART Pin */
- DrvGPIO_InitFunction(E_FUNC_UART0);
- /* UART Setting */
- sParam.u32BaudRate = 115200;
- sParam.u8cDataBits = DRVUART_DATABITS_8;
- sParam.u8cStopBits = DRVUART_STOPBITS_1;
- sParam.u8cParity = DRVUART_PARITY_NONE;
- sParam.u8cRxTriggerLevel= DRVUART_FIFO_1BYTES;
- /* Set UART Configuration */
- if(DrvUART_Open(UART_PORT0,&sParam) != E_SUCCESS)
- {
- printf("UART0 open failed\n");
- return FALSE;
- }
- printf("================================================\n\r");
- printf(" 菜农新唐M0助学板范例 \n\r");
- printf(" 实验十： DATA FLASH读写例程 \n\r");
- printf(" 烈火狂龙 论坛ID: plc_avr \n\r");
- printf("================================================\n\r");
- if(DATA_FLASH_Read(0)==0xFFFFFFFF)
- {
- DATA_FLASH_Write(0,0);
- DATA_FLASH_Write(1,1);
- DATA_FLASH_Write(2,2);
- }
- else
- {
- temp1 = DATA_FLASH_Read(0);
- printf("当前DATA FLASH 地址0数据: %ld\n", temp1);
- temp2 = DATA_FLASH_Read(1);
- printf("当前DATA FLASH 地址1数据: %ld\n", temp2);
- temp3 = DATA_FLASH_Read(2);
- printf("当前DATA FLASH 地址2数据: %ld\n", temp3);
- DATA_FLASH_Write(0,temp1+1);
- DATA_FLASH_Write(1,temp2+1);
- DATA_FLASH_Write(2,temp3+1);
- }
- printf("演示结束，按板子上面复位，可以看到DATA FLASH数据累加并保存\n");
- while(1)
- {
- }
- }
- //============================================================================
- // END
- //============================================================================
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