LPC1768 UCOSII 移植到IAR8.3环境下，编译没有问题，运行卡死...

放开那个鸡腿 · 发表于 2018-12-29 14:24:46

之前程序是在KEIL5环境下的，运行没有问题；
现在改到IAR8.30环境，配置后编译，有3个告警，如下标黑；
Warning[Pa082]: undefined behavior: the order of volatile accesses is undefined in this statement

因为这个是变量相关的，没有处理

//system_LPC17xx.c文件

void SystemCoreClockUpdate (void)          /* Get Core Clock Frequency    */
{
  /* Determine clock frequency according to clock register values          */
  if (((LPC_SC->PLL0STAT >> 24) & 3) == 3) { /* If PLL0 enabled and connected */
switch (LPC_SC->CLKSRCSEL & 0x03) {
   case 0:                               /* Int. RC oscillator => PLL0 */
   case 3:                               /* Reserved, default to Int. RC  */
      SystemCoreClock = (IRC_OSC *
                        ((2 * ((LPC_SC->PLL0STAT & 0x7FFF) + 1)))  /
                        (((LPC_SC->PLL0STAT >> 16) & 0xFF) + 1) /
                        ((LPC_SC->CCLKCFG & 0xFF)+ 1));
      break;
   case 1:                               /* Main oscillator => PLL0    */
      SystemCoreClock = (OSC_CLK *
                        ((2 * ((LPC_SC->PLL0STAT & 0x7FFF) + 1)))  /
                        (((LPC_SC->PLL0STAT >> 16) & 0xFF) + 1) /
                        ((LPC_SC->CCLKCFG & 0xFF)+ 1));
      break;
   case 2:                               /* RTC oscillator => PLL0       */
   SystemCoreClock = (RTC_CLK *
                        ((2 * ((LPC_SC->PLL0STAT & 0x7FFF) + 1)))  /
                        (((LPC_SC->PLL0STAT >> 16) & 0xFF) + 1) /
                        ((LPC_SC->CCLKCFG & 0xFF)+ 1));
      break;
}
  } else {
switch (LPC_SC->CLKSRCSEL & 0x03) {
   case 0:                               /* Int. RC oscillator => PLL0 */
   case 3:                               /* Reserved, default to Int. RC  */
      SystemCoreClock = IRC_OSC / ((LPC_SC->CCLKCFG & 0xFF)+ 1);
      break;
   case 1:                               /* Main oscillator => PLL0    */
      SystemCoreClock = OSC_CLK / ((LPC_SC->CCLKCFG & 0xFF)+ 1);
      break;
   case 2:                               /* RTC oscillator => PLL0       */
      SystemCoreClock = RTC_CLK / ((LPC_SC->CCLKCFG & 0xFF)+ 1);
      break;
}
  }

//----------------------------------------------------------------------------------
下载运行后，前边初始化时没有问题的，每次运行到下边标黑处就卡死了
int main(void)
{
      BSP_Init ();
      BSP_Start ();
      OSInit();

      Timer0_Init();


      OSTaskCreate(LEDON, (void *)0, &stkLEDON[sizeof(stkLEDON)/4-1], 5);
      OSTaskCreate(LEDOFF, (void *)0, &stkLEDOFF[sizeof(stkLEDOFF)/4-1], 4);

      OSStart();

}

卡死到下边标黑处
//startup_LPC177x_8x.s文件
      PUBWEAK HardFault_Handler
      SECTION .text:CODE:NOROOT:REORDER(1)
HardFault_Handler
      B HardFault_Handle

有如下提示：
Fri Dec 28, 2018 17:15:45: A precise data access error has occurred (CFSR.PRECISERR, BFAR) at data address 0x40034000.