瑞萨官方提供的串口例程，见附件。运行起来的效果与官方说明的一样
资源文件列表
sample_UART/sample_UART/DefaultBuild/r_cg_cgc.rel , 1868
sample_UART/sample_UART/DefaultBuild/r_cg_cgc_user.rel , 1880
sample_UART/sample_UART/DefaultBuild/r_cg_serial.rel , 4312
sample_UART/sample_UART/DefaultBuild/r_cg_serial_user.rel , 4188
sample_UART/sample_UART/DefaultBuild/r_main.rel , 2532
sample_UART/sample_UART/DefaultBuild/r_systeminit.rel , 2324
sample_UART/sample_UART/DefaultBuild/sample_UART.hex , 184684
sample_UART/sample_UART/DefaultBuild/sample_UART.lmf , 12304
sample_UART/sample_UART/DefaultBuild/sample_UART.map , 13721
sample_UART/sample_UART/DefaultBuild/sample_UART.sym , 1651
sample_UART/sample_UART/r_cg_cgc.c , 4223
sample_UART/sample_UART/r_cg_cgc.h , 10473
sample_UART/sample_UART/r_cg_cgc_user.c , 4069
sample_UART/sample_UART/r_cg_macrodriver.h , 4810
sample_UART/sample_UART/r_cg_serial.c , 10462
sample_UART/sample_UART/r_cg_serial.h , 25067
sample_UART/sample_UART/r_cg_serial_user.c , 6810
sample_UART/sample_UART/r_cg_userdefine.h , 2532
sample_UART/sample_UART/r_main.c , 4905
sample_UART/sample_UART/r_systeminit.c , 4502
sample_UART/sample_UART/sample_UART.mtpj , 305346
sample_UART/sample_UART/sample_UART.n.mtud , 321343
超纬原理图.pdf , 28894