altos: Clear any broken cc1120 TX fifo bits before transmitting

[fw/altos] / src / drivers / ao_cc1120.c

diff --git a/src/drivers/ao_cc1120.c b/src/drivers/ao_cc1120.c
index a26eccbc26d10a16b1719a12a612aeb0fa049dad..07ebf8356cf5f3e108d4eaa202fd64e19d840d03 100644 (file)
--- a/src/drivers/ao_cc1120.c
+++ b/src/drivers/ao_cc1120.c
@@ -30,6 +30,7 @@ static uint8_t ao_radio_wake;         /* radio ready. Also used as sleep address */
 static uint8_t ao_radio_abort;         /* radio operation should abort */
 static uint8_t ao_radio_mcu_wake;      /* MARC status change */
 static uint8_t ao_radio_marc_status;   /* Last read MARC status value */
+static uint8_t ao_radio_tx_finished;   /* MARC status indicates TX finished */
 
 #define CC1120_DEBUG   AO_FEC_DEBUG
 #define CC1120_TRACE   0
@@ -242,6 +243,8 @@ ao_radio_check_marc_status(void)
        /* Anyt other than 'tx/rx finished' means an error occurred */
        if (ao_radio_marc_status & ~(CC1120_MARC_STATUS1_TX_FINISHED|CC1120_MARC_STATUS1_RX_FINISHED))
                ao_radio_abort = 1;
+       if (ao_radio_marc_status & (CC1120_MARC_STATUS1_TX_FINISHED))
+               ao_radio_tx_finished = 1;
 }
 
 static void
@@ -258,6 +261,7 @@ ao_radio_start_tx(void)
        ao_exti_set_callback(AO_CC1120_INT_PORT, AO_CC1120_INT_PIN, ao_radio_isr);
        ao_exti_enable(AO_CC1120_INT_PORT, AO_CC1120_INT_PIN);
        ao_exti_enable(AO_CC1120_MCU_WAKEUP_PORT, AO_CC1120_MCU_WAKEUP_PIN);
+       ao_radio_tx_finished = 0;
        ao_radio_strobe(CC1120_STX);
 }
 
@@ -268,6 +272,8 @@ ao_radio_idle(void)
                uint8_t state = ao_radio_strobe(CC1120_SIDLE);
                if ((state >> CC1120_STATUS_STATE) == CC1120_STATUS_STATE_IDLE)
                        break;
+               if ((state >> CC1120_STATUS_STATE) == CC1120_STATUS_STATE_TX_FIFO_ERROR)
+                       ao_radio_strobe(CC1120_SFTX);
        }
        /* Flush any pending TX bytes */
        ao_radio_strobe(CC1120_SFTX);
@@ -671,12 +677,17 @@ ao_radio_test_cmd(void)
 }
 
 static void
-ao_radio_wait_isr(void)
+ao_radio_wait_isr(uint16_t timeout)
 {
+       if (timeout)
+               ao_alarm(timeout);
        ao_arch_block_interrupts();
        while (!ao_radio_wake && !ao_radio_mcu_wake && !ao_radio_abort)
-               ao_sleep(&ao_radio_wake);
+               if (ao_sleep(&ao_radio_wake))
+                       ao_radio_abort = 1;
        ao_arch_release_interrupts();
+       if (timeout)
+               ao_clear_alarm();
        if (ao_radio_mcu_wake)
                ao_radio_check_marc_status();
 }
@@ -687,7 +698,7 @@ ao_radio_wait_tx(uint8_t wait_fifo)
        uint8_t fifo_space = 0;
 
        do {
-               ao_radio_wait_isr();
+               ao_radio_wait_isr(0);
                if (!wait_fifo)
                        return 0;
                fifo_space = ao_radio_tx_fifo_space();
@@ -706,11 +717,17 @@ ao_radio_send(const void *d, uint8_t size)
        uint8_t         this_len;
        uint8_t         started = 0;
        uint8_t         fifo_space;
+       uint8_t         q;
 
        encode_len = ao_fec_encode(d, size, tx_data);
 
        ao_radio_get(encode_len);
 
+       ao_radio_abort = 0;
+
+       /* Flush any pending TX bytes */
+       ao_radio_strobe(CC1120_SFTX);
+
        started = 0;
        fifo_space = CC1120_FIFO_SIZE;
        while (encode_len) {
@@ -741,6 +758,8 @@ ao_radio_send(const void *d, uint8_t size)
                        break;
                }
        }
+       while (started && !ao_radio_abort && !ao_radio_tx_finished)
+               ao_radio_wait_isr(0);
        ao_radio_put();
 }
 
@@ -777,7 +796,7 @@ ao_radio_send_aprs(ao_radio_fill_func fill)
                        /* Wait for some space in the fifo */
                        while (!ao_radio_abort && (fifo_space = ao_radio_tx_fifo_space()) == 0) {
                                ao_radio_wake = 0;
-                               ao_radio_wait_isr();
+                               ao_radio_wait_isr(0);
                        }
                        if (ao_radio_abort)
                                break;
@@ -809,7 +828,7 @@ ao_radio_send_aprs(ao_radio_fill_func fill)
                }
                /* Wait for the transmitter to go idle */
                ao_radio_wake = 0;
-               ao_radio_wait_isr();
+               ao_radio_wait_isr(0);
        }
        ao_radio_put();
 }
@@ -886,7 +905,7 @@ ao_radio_rx_wait(void)
 }
 
 uint8_t
-ao_radio_recv(__xdata void *d, uint8_t size)
+ao_radio_recv(__xdata void *d, uint8_t size, uint8_t timeout)
 {
        uint8_t         len;
        uint16_t        i;
@@ -940,7 +959,7 @@ ao_radio_recv(__xdata void *d, uint8_t size)
        ao_radio_strobe(CC1120_SRX);
 
        /* Wait for the preamble to appear */
-       ao_radio_wait_isr();
+       ao_radio_wait_isr(timeout);
        if (ao_radio_abort)
                goto abort;