TI中文支持网Error connecting to the target:
(Error -1155 @ 0x0)
Device may be operating in low-power mode. 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 5.1.450.0)
answer：
检查一下2812是否处于低功耗模式
尝试复位一下2812或给板子重新上电
降低JTAG的速率
