void rf_receive_isr() { int rf_rx_len = 0; int rssi = 0; char crc_ok = 0; rf_rx_len = RFD - 2; // 长度去除两字节附加结果 rf_rx_len &= 0x7F; for (int i = 0; i < rf_rx_len; i++) { rf_rx_buf[i] = RFD; // 连续读取接收缓冲区内容 } rssi