换了个芯片,就好了。不过后来在BIT配置中 增加了 DEBUG=ON ,这样GONFIG1L就能可靠保证在DEBUG模式。
#pragma config WDTEN = ON, STVREN = OFF, XINST = OFF, CP0 = OFF,DEBUG = ON
#pragma config FOSC = HS, FOSC2 = ON, FCMEN = OFF, IESO = OFF
#pragma config WDTPS = 32768, CCP2MX = DEFAULT//512
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