FRAM 存储

BAORONG YANG 说：

最大50个字节，但具体的地�能否告知哈，我在手册上没找到

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 *                       MSP430 CODE EXAMPLE DISCLAIMER
 *
 * MSP430 code examples are self-contained low-level programs that typically
 * demonstrate a single peripheral function or device feature in a highly
 * concise manner. For this the code may rely on the device's power-on default
 * register values and settings such as the clock configuration and care must
 * be taken when combining code from several examples to avoid potential side
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 * for an API functional library-approach to peripheral configuration.
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//******************************************************************************
//   MSP430FR69xx Demo - Long word writes to FRAM
//
//   Description: Use long word write to write to 512 byte blocks of FRAM.
//   Toggle LED after every 100 writes.
//   NOTE: Running this example for extended periods will impact the FRAM
//   endurance. MPU is also enabled by default in CCS.
//   MCLK = SMCLK = default DCO
//
//           MSP430FR6989
//         ---------------
//     /|\|               |
//      | |               |
//      --|RST            |
//        |               |
//        |               |
//        |          P1.0 |---> LED
//
//   Kathryn Adamsky
//   Texas Instruments Inc.
//   July 2016 (Updated) | April 2014 (Created)
//   Built with IAR Embedded Workbench V5.60 & Code Composer Studio V6.0
//******************************************************************************
#include <msp430.h>

void FRAMWrite(void);

#define WRITE_SIZE      128

unsigned char count = 0;
unsigned long data;

#if defined(__TI_COMPILER_VERSION__)
#pragma NOINIT(FRAM_write)
unsigned long FRAM_write[WRITE_SIZE] ;
#elif defined(__IAR_SYSTEMS_ICC__)
__persistent unsigned long FRAM_write[WRITE_SIZE] = {0};
#else
#error Compiler not supported!
#endif

int main(void)
{
  WDTCTL = WDTPW | WDTHOLD;                 // Stop WDT

  // Configure GPIO
  P1OUT &= ~BIT0;                           // Clear P1.0 output latch for a defined power-on state
  P1DIR |= BIT0;                            // Set P1.0 to output direction

  // Disable the GPIO power-on default high-impedance mode to activate
  // previously configured port settings
  PM5CTL0 &= ~LOCKLPM5;

  // Initialize dummy data
  data = 0x00010001;

  while(1)
  {
    data += 0x00010001;
    FRAMWrite();                            // Endless loop
    count++;
    if (count > 100)
    {
      P1OUT ^= 0x01;                        // Toggle LED to show 512K bytes
      count = 0;                            // ..have been written
      data = 0x00010001;
    }
  }
}

void FRAMWrite(void)
{
  unsigned int i=0;

  for ( i= 0; i<128; i++)
  {
      FRAM_write[i] = data;
  }
}