-static FIFOBuffer delay_fifo;
-
-/**
- * Buffer for delay FIFO.
- * The 1 is added because the FIFO macros need
- * 1 byte more to handle a buffer (SAMPLEPERBIT / 2) bytes long.
- */
-static int8_t delay_buf[SAMPLEPERBIT / 2 + 1];
-
-static FIFOBuffer rx_fifo;
-static uint8_t rx_buf[CONFIG_AFSK_RX_BUFLEN];
-
-static FIFOBuffer tx_fifo;
-static uint8_t tx_buf[CONFIG_AFSK_TX_BUFLEN];
-
-static int16_t iir_x[2];
-static int16_t iir_y[2];
-
-static uint8_t sampled_bits;
-static uint8_t found_bits;
-static uint8_t demod_bits;
-static int8_t curr_phase;
-
-static bool hdlc_rxstart;
-static uint8_t hdlc_currchar;
-static uint8_t hdlc_bit_idx;
-