TMS320F28P550SJ: Device may be operating in low-power mode. Do you want to bring it out of this mode?

程序通过仿真器写入后开始单步调试，执行至GPIO口初始化时“GpioCtrlRegs.GPBMUX1.all = 0x00000000L;”会出现如下报警：

Can't Single Step Target Program: (Error -1156 @ 0x82256) Device may be operating in low-power mode. Do you want to bring it out of this mode?

此时选择"YES"或“cancel”后，两种情况下，仿真器都会断开连接，此时再连接目标时，则无法连接了。

报警界面报警内容如下：

C28xx_CPU1: Can't Single Step Target Program: (Error -1156 @ 0x82256) Device may be operating in low-power mode. Do you want to bring it out of this mode? Choose 'Yes' to force the device to wake up and retry the operation. Choose 'No' to retry the operation without waking the device. (Emulation package 12.8.0.00189)C28xx_CPU1: Trouble Halting Target CPU: (Error -1044 @ 0x0) The debug probe reported an error. Confirm debug probe configuration and connections, reset the debug probe, and retry the operation. (Emulation package 12.8.0.00189)C28xx_CPU1: JTAG Communication Error: (Error -1044 @ 0x0) The debug probe reported an error. Confirm debug probe configuration and connections, reset the debug probe, and retry the operation. (Emulation package 12.8.0.00189)IcePick_C_0: Error connecting to the target: (Error -2131 @ 0x0) Unable to access device register. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 12.8.0.00189)

请问：

1、这种情况下，如何重新连接目标芯片？

2、从哪个方向查找导致此问题的原因？

Alice：

您好，

    可能代码配置冲突了，请参考 gpio.c (ti.com)里void GPIO_setPinConfig(uint32_t pinConfig)

    下面帖子讨论了类似问题，请参考

TMS320F28379D: After trying to increase PLL frequency, system shows the error: "Device may be operating in low-power mode. The debugger has forced the device to wake up.", and never connects – C2000 microcontrollers forum – C2000︎ microcontrollers – TI E2E support forums

TMS320F280049C: LOW POWER MODE ERROR – C2000 microcontrollers forum – C2000︎ microcontrollers – TI E2E support forums