//基于msp430F149单片机的flash读写，记录430的运行状态，
//实现在复位和掉电的情况下，恢复原始运行状态。

#include  
#include  "function.h"

unsigned char value1=0;             // 待写入段A的值
unsigned char *data =(unsigned char *)0x4080; // 段A的头指针

void write_SegA (unsigned char value1)
{
  char *Flash_ptr;                          // Flash pointer
  Flash_ptr = (char *) 0x4080;              // 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;                      // Set WRT bit for write operation

  *Flash_ptr = value1;                   // Write value1 to flash
  _NOP();                                 // SET BREAKPOINT HERE 至关重要！！需要此等待
  FCTL1 = FWKEY;                            // Clear WRT bit
  FCTL3 = FWKEY + LOCK;                     // Set LOCK bit
}
void main(void)
{
  WDTCTL = WDTPW + WDTHOLD;                 // Stop watchdog timer  
  P3DIR |= 0x23;
  P2DIR |= 0xFF;  
  XT2_open();
  uart1_init((8000000/115200)%6,(8000000/115200)/256);
  FCTL2 = FWKEY + FSSEL0 + FN2 + FN4;         // MCLK/20 for Flash Timing Generator
  
  while(1){
   P2OUT =*data;              //led灯指示
   yanshi_1ms(1000);            //延时1s
   write_SegA(*data+1);                    // 读出段A第一个值，增加1，并赋给value1，写入flash
   sendi(i);sends(" : ");
   sendi(*data);sends("n");          // 串口发送信息
  }
}