MSP430FR2433 FRAM 當 EEPROM

Hello ~ 

請問有沒有 fram 當 EEPROM 的 讀/寫 Sample code ??

謝謝

Ryan

灰小子：

对fram的写操作应该就算当作eeprom吧

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//******************************************************************************
//!Long word writes to FRAM
//!
//!Description: Use long word write to write to 512 byte blocks of FRAM.
//!Toggle LEDs after every 100 writes.
//!NOTE: Running this example for extended periods will impact the FRAM
//!endurance.
//!ACLK = VLO, MCLK = SMCLK = ~1.048MHz
//!
//!MSP430FR2xx_4xx Board
//!---------------
//!/|\||
//!| ||
//!--|RST|
//!||
//!||
//!||-->LED1
//!||-->LED2
//!
//******************************************************************************
#include "driverlib.h"
#include "Board.h"#define FRAM_TEST_START 0xCABAvoid main(void) {uint8_t count = 0;uint32_t data = 0;// Stop WDTWDT_A_hold(WDT_A_BASE);//Set LED1 as an output pin.GPIO_setAsOutputPin(GPIO_PORT_LED1,GPIO_PIN_LED1);//Set LED2 as an output pin.GPIO_setAsOutputPin(GPIO_PORT_LED2,GPIO_PIN_LED2);/** Disable the GPIO power-on default high-impedance mode to activate* previously configured port settings*/PMM_unlockLPM5();// Initialize dummy datadata = 0x11111111;while (1) {data += 0x00010001;FRAMCtl_fillMemory32(data, (uint32_t *) FRAM_TEST_START,128);count++;if (count > 100) {//Toggle LED1 output pin.GPIO_toggleOutputOnPin(GPIO_PORT_LED1, GPIO_PIN_LED1);//Toggle LED2 output pin.GPIO_toggleOutputOnPin(GPIO_PORT_LED2, GPIO_PIN_LED2);//Reset countercount = 0;data = 0x11111111;}}
}

Ryan wen1：

Hello ~

感謝回覆 !!

以下這行 , 看起來應該是可以寫入資料到 fram , 但要如何讀出資料呢 ?

FRAMCtl_fillMemory32(data, (uint32_t *) FRAM_TEST_START, 128);

Thanks !!

Ryan

Susan Yang：

回复 Ryan wen1:

您可以看一下 www.ti.com/…/slaa628.pdf 以及 e2e.ti.com/…/1736699

灰小子：

回复 Ryan wen1:

直接读取相应地址就可以

Ryan wen1：

回复 灰小子:

我的程序如下 , 可以讀寫 , 但不能掉電保存 , 可不可以幫忙一下…… 謝謝
(　msp430FR2433的 FRAM　作EEPROM的功能　！！！)

#define FRAM_TEST_START 0xCABA

unsigned int data;
unsigned int *FRAM_write_ptr;
unsigned char wp ;
unsigned charstate ;

void main(void)
{unsigned char dd[12];unsigned char i ;
for(i=0;i<8;i++)dd[i] = FRAM_Read(i);FRCTL0 = FRCTLPW | NWAITS_7;/* Frame wait state enable */wp = DFWP | PFWP;state = HWREG8(SYS_BASE + OFS_SYSCFG0_L);HWREG16(SYS_BASE + OFS_SYSCFG0) = FWPW | (state & ~wp);
for(i=0;i<8;i++)dd[i] = FRAM_Read(i);while(1){for(i=0;i<8;i++) FRAM_Write(i , 0xcc);P1OUT ^= BIT0;
for(i=0;i<8;i++)dd[i] = FRAM_Read(i);P1OUT ^= BIT0;}
}
//***************************************************************************************
//***************************************************************************************

unsigned char FRAM_Read(unsigned char Offset )
{FRAM_write_ptr = (unsigned int *)FRAM_TEST_START;return *(FRAM_write_ptr+Offset);
}

//***************************************************************************************
//***************************************************************************************

void FRAM_Write(unsigned char Offset , unsigned char data)
{FRAM_write_ptr = (unsigned int *)FRAM_TEST_START;SYSCFG0 &= ~DFWP;*(FRAM_write_ptr+Offset) = data;SYSCFG0 |= DFWP;
}

//***************************************************************************************
//***************************************************************************************

灰小子：

回复 Ryan wen1:

你的意思是调电后FRAM_TEST_START及之后地址上的数据就没有了吗？

你怎么检查的？有没有读出来显示在显示屏或者串口发送的上位机看看？

Ryan wen1：

回复 灰小子:

dirtwillfly

你的意思是调电后FRAM_TEST_START及之后地址上的数据就没有了吗？

你怎么检查的？有没有读出来显示在显示屏或者串口发送的上位机看看？

Xiaodong LI：

回复 Ryan wen1:

如果想利用MSP的FRAM模拟独立的串口的EEPROM IC， 请参考这个www.ti.com/…/tidubi8a.pdf

Xiaodong LI：

回复 Xiaodong LI:

如果是在同一片单片机上存储参数的需求，可以参考官方样例程序中framwrite.c的程序。FRAM读写读写操作都非常直观，FRAM不需要片擦除，唯一需要注意的是SYSCFG0上的DFWP（write protection）。www.ti.com/…/getliterature.tsp