nrf5x/nrf52840首次MDK编译失败

[githubhjz]

clone代码后，使用pgks --update更新好，使用scons --target=mdk5生成工程，但是编译失败，编译错误信息如下： `Build started: Project: project *** Using Compiler 'V5.06 update 6 (build 750)', folder: 'D:\Program Files (x86)\Keil_v5\ARM\ARMCC\Bin' Build target 'rtthread' compiling drv_uart.c... ..\libraries\drivers\drv_uart.c(32): error: #20: identifier "NRFX_UART0_INST_IDX" is undefined .uart = NRFX_UART_INSTANCE(0), ..\libraries\drivers\drv_uart.c: 0 warnings, 1 error compiling board.c... packages\nrfx-v2.1.0\drivers\include\nrfx_power_clock.h(55): error: #35: #error directive: "This code is not supposed to be compiled when neither POWER nor CLOCK is enabled."

error "This code is not supposed to be compiled when neither POWER nor CLOCK is enabled."

board\board.c: 0 warnings, 1 error ".\build\rtthread.axf" - 2 Error(s), 0 Warning(s). Target not created. Build Time Elapsed: 00:00:03`

[githubhjz]

需要通过env开启串口就可以编译通过了

[Guozhanxin]

这个也可以提个pr修复下。默认开启串口。