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TMS320F28379D: LAUNCHXL-F28379D

Part Number: TMS320F28379D

#include "driverlib.h"
#include "device.h"
uint32_t clock1=0,lowclock1=0;
void main(void)
{
    //
      // Disable the watchdog
      //
      SysCtl_disableWatchdog();

  #ifdef CMDTOOL
      CMD_init();
  #endif

  #ifdef _FLASH
  #ifndef CMDTOOL
      //
      // Copy time critical code and flash setup code to RAM. This includes the
      // following functions: InitFlash();
      //
      // The RamfuncsLoadStart, RamfuncsLoadSize, and RamfuncsRunStart symbols
      // are created by the linker. Refer to the device .cmd file.
      //
      memcpy(&RamfuncsRunStart, &RamfuncsLoadStart, (size_t)&RamfuncsLoadSize);
  #endif
      //
      // Call Flash Initialization to setup flash waitstates. This function must
      // reside in RAM.
      //
      Flash_initModule(FLASH0CTRL_BASE, FLASH0ECC_BASE, DEVICE_FLASH_WAITSTATES);
  #endif
  #ifdef CPU1

      //
      // Configure Analog Trim in case of untrimmed or TMX sample
      //
//      if((SysCtl_getDeviceParametric(SYSCTL_DEVICE_QUAL) == 0x0U)       &&
//         (HWREGH(ANALOGSUBSYS_BASE + ASYSCTL_O_ANAREFTRIMA) == 0x0U))
//      {
//          Device_configureTMXAnalogTrim();
//      }

      //
      // Set up PLL control and clock dividers
      //
      SysCtl_setClock(DEVICE_SETCLOCK_CFG);

      //
      // Make sure the LSPCLK divider is set to the default (divide by 4)
      //
      SysCtl_setLowSpeedClock(SYSCTL_LSPCLK_PRESCALE_4);

      //
      // These asserts will check that the #defines for the clock rates in
      // device.h match the actual rates that have been configured. If they do
      // not match, check that the calculations of DEVICE_SYSCLK_FREQ and
      // DEVICE_LSPCLK_FREQ are accurate. Some examples will not perform as
      // expected if these are not correct.
      //
      clock1=SysCtl_getClock(DEVICE_OSCSRC_FREQ);
      lowclock1=SysCtl_getLowSpeedClock(DEVICE_OSCSRC_FREQ);

      ASSERT(SysCtl_getClock(DEVICE_OSCSRC_FREQ) == DEVICE_SYSCLK_FREQ);
      ASSERT(SysCtl_getLowSpeedClock(DEVICE_OSCSRC_FREQ) == DEVICE_LSPCLK_FREQ);

  #ifndef _FLASH
      //
      // Call Device_cal function when run using debugger
      // This function is called as part of the Boot code. The function is called
      // in the Device_init function since during debug time resets, the boot code
      // will not be executed and the gel script will reinitialize all the
      // registers and the calibrated values will be lost.
      // Sysctl_deviceCal is a wrapper function for Device_Cal
      //
    //   SysCtl_deviceCal();
  #endif

  #endif
      //
      // Turn on all peripherals
      //
   //  Device_enableAllPeripherals();
}

移植universalmotor_lab 到 F28379D平台上,系统时钟出现了问题,目标是配置系统时钟为200M ,低速时钟为50M,

clock1=SysCtl_getClock(DEVICE_OSCSRC_FREQ);
lowclock1=SysCtl_getLowSpeedClock(DEVICE_OSCSRC_FREQ);

但是现在用读到的时钟全部是400M 。同样的代码在其他工程上是正确的。请问这个是为什么?