源码/核心板/Src/OnChipDevices/Usart.c @@ -44,3 +44,13 @@ } uint16_t Checksum_u16(uint8_t *pdata, uint32_t len) { uint16_t sum = 0; uint32_t i; for(i = 0; i < len; i++) sum += pdata[i]; sum = ~sum; return sum; }