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参考 http://www.ti.com/lit/an/swra290/swra290.pdf 第3页可知
1) P0_7 can be moved to any GPIO pin, and the macros below HAL_PA_LNA_RX_LGM() and HAL_PA_LNA_RX_HGM() must be modified accordingly.
2) P1_1 and P1_4 are a subset of GPIO pins (only P1.0-P1.5) that can be configured to support special RF observation output control signals. PAEN and EN of the CC2591 are directly controlled by these signals via the radio core logic of the CC2530.
不能随意设置IO口