About MSP430F149 Flash

glphighlj

About MSP430F149 Flash [Copy Link]

About MSP430F149 Flash

In order to realize data collection and storage in on-chip Flash, the board made by myself uses an 8M crystal oscillator instead of a 32K one. Now the program can be downloaded to the MCU, but the data cannot be written into Flash. The program can write the data into Flash in the development board. The reason has been found for three or four days, but I still don't know the reason. I hope experts can give me some advice.

wstt

What you mean is that the user FLASH cannot be used normally. This mainly depends on the configuration of the FLASH controller

[ This post was last edited by wstt on March 26, 2012 at 10:34 ]

glphighlj

Thank you for your help. Can you help me look at my program? See what's wrong

#include <msp430.h>
#include "BoardConfig.h
uint *Flash_ptr;                           // Flash pointer
unsigned int i;

void flash_write(void)
{
  while(FCTL3 & BUSY);
  FCTL2 = FWKEY + FSSEL0 + FN4+ FN1+ FN0;              // MCLK/20 for Flash Timing Generator
  Flash_ptr = (uint *) 0x2080;               // Initialize Flash pointer
  FCTL1 = FWKEY + ERASE;                     // Set Erase bit
  FCTL3 = FWKEY;// Clear Lock bit
 
  *Flash_ptr = 0;                            // Dummy write to erase Flash segment
  FCTL1 = FWKEY + WRT;

}

void int_clk(void)
{
   BCSCTL1&=~XT2OFF; //Open XT oscillator
    do
 {
        IFG1 &= ~OFIFG; //Clear oscillation error flag
        for(i = 0; i < 100; i++);
   _NOP(); //Delay waiting
        }
    while ((IFG1 & OFIFG) != 0); //If the flag is 1, continue the cycle waiting
    BCSCTL2|=SELM_0;                    //MCLK 8M  
}

void main( void )
{
    WDTCTL = WDTPW + WDTHOLD; //Turn off the dog
    int_clk();
    flash_write();  
    while((FCTL3&BUSY)==BUSY) ;// Wait for FLASH memory to complete operation
    for(i=0;i<8;i++)
      {
       *Flash_ptr=0x30;                // Move results;
      
        Flash_ptr++;
       
      }
    FCTL1 = FWKEY; // Clear WRT bit
    FCTL3 = FWKEY + LOCK; // Reset LOCK bit
    _EINT();

}

This program can write 8 flash 0030s on the development board, but not on my board

glphighlj

Thank you for your help. Can you help me look at my program? See what's wrong

#include
#include "BoardConfig.h
uint *Flash_ptr;                           // Flash pointer
unsigned int i;

void flash_write(void)
{
  while(FCTL3 & BUSY);
  FCTL2 = FWKEY + FSSEL0 + FN4+ FN1+ FN0;              // MCLK/20 for Flash Timing Generator
  Flash_ptr = (uint *) 0x2080;               // Initialize Flash pointer
  FCTL1 = FWKEY + ERASE;                     // Set Erase bit
  FCTL3 = FWKEY;// Clear Lock bit
  
  *Flash_ptr = 0;                            // Dummy write to erase Flash segment
  FCTL1 = FWKEY + WRT;

}


void int_clk(void)
{
   BCSCTL1&=~XT2OFF; //Open XT oscillator
    do
{
        IFG1 &= ~OFIFG; //Clear oscillation error flag
        for(i = 0; i < 100; i++);
   _NOP(); //Delay waiting
        }
    while ((IFG1 & OFIFG) != 0); //If the flag is 1, continue the cycle waiting
    BCSCTL2|=SELM_0;                    //MCLK 8M   
}

void main( void )
{
    WDTCTL = WDTPW + WDTHOLD; //Turn off the dog
    int_clk();
    flash_write();   
    while((FCTL3&BUSY)==BUSY) ;// Wait for FLASH memory to complete operation
    for(i=0;i<8;i++)
      {
       *Flash_ptr=0x30;                // Move results;
      
        Flash_ptr++;
        
      }
    FCTL1 = FWKEY; // Clear WRT bit
    FCTL3 = FWKEY + LOCK; // Reset LOCK bit
    _EINT();

}

This program can write 8 flash 0030s on the development board, but not on my board

glphighlj

The problem has been solved, thank you very much for your help!

Triton.zhang

Let's talk about how to solve the problem.

glphighlj

The crystal oscillator didn't start, and then it was solved^_^