在使用开发板做电机控制RAM下全速运行，Expressions的value和graph实时刷新观测，但不一会就停止刷新，出现错误，怀疑是不是仿真器的问题。请问如何解决？
Value显示
Console窗口显示：
IcePick_C_0: Trouble Reading Memory Block at 0x0 on Page 0 of Length 0xc8
IcePick_C_0: Trouble Reading Memory Block at 0x0 on Page 0 of Length 0xc8
C28xx_CPU1: Error: (Error -150 @ 0x0) One of the FTDI driver functions used during configuration returned a invalid status or an error. (Emulation package 7.0.100.1)
C28xx_CPU1: Unable to determine target status after 20 attempts
C28xx_CPU1: Failed to remove the debug state from the target before disconnecting. There may still be breakpoint op-codes embedded in program memory. It is recommended that you reset the emulator before you connect and reload your program before you continue debugging
IcePick_C_0: Error: (Error -150 @ 0x0) One of the FTDI driver functions used during configuration returned a invalid status or an error. (Emulation package 7.0.100.1)
IcePick_C_0: Unable to determine target status after 20 attempts
IcePick_C_0: Failed to remove the debug state from the target before disconnecting. There may still be breakpoint op-codes embedded in program memory. It is recommended that you reset the emulator before you connect and reload your program before you continue debugging
C28xx_CPU2: Error: (Error -150 @ 0x0) One of the FTDI driver functions used during configuration returned a invalid status or an error. (Emulation package 7.0.100.1)
C28xx_CPU2: Unable to determine target status after 20 attempts
C28xx_CPU2: Failed to remove the debug state from the target before disconnecting. There may still be breakpoint op-codes embedded in program memory. It is recommended that you reset the emulator before you connect and reload your program before you continue debugging
