MSP430FR2433 FRAM 當 EEPROM

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 0xCABA

void main(void) {
    uint8_t count = 0;
    uint32_t data = 0;

    // Stop WDT
    WDT_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 data
    data = 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 counter
            count = 0;
            data = 0x11111111;
        }
    }
}

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

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

直接读取相应地址就可以

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 char state ;

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;
}

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

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？

dirtwillfly 说：

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？

Hello dirtwillfly , 

感謝您的回覆 , 它現在可以 work 了 , 我把它用串口打印出來看了 !!! 謝謝 ~

想再跟您請教一個問題 , 我怎麼定它的記億體的位置才合理 , 才不會壓到

我程式使用的區段,段成當機?

Thanks ~

Ryan

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

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