飞思卡尔16位单片机MC9S12XE系列用协处理器X-GATE驱动串口SCIence的C语言参考代码，绝对能用，本人在MC9S12XEQ512上测试通过。-Freescale 16-bit single-chip coprocessor MC9S12XE series by X-GATE-driven serial port of the C Language Reference SCIence code, absolutely can, I MC9S12XEQ512 on the test.