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atusb/fw/mac.c: queue frame reception if USB is busy

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This way we we make sure we retrieve the frame and thus release dynamic
buffer protection (if enabled).
This commit is contained in:
Werner Almesberger 2013-04-01 15:17:37 -03:00
parent ad70d7c129
commit 65722d417a
1 changed files with 23 additions and 1 deletions
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24
atusb/fw/mac.c
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@ -30,6 +30,7 @@ static uint8_t tx_buf[MAX_PSDU];
static uint8_t tx_size = 0;
static bool txing = 0;
static bool queued_tx_ack = 0;
static bool queued_rx = 0;
static uint8_t reg_read(uint8_t reg)
@ -54,9 +55,17 @@ static void reg_write(uint8_t reg, uint8_t value)
}
static void receive_frame(void);
static void rx_done(void *user)
{
led(0);
if (queued_rx) {
receive_frame();
queued_rx = 0;
return;
}
if (queued_tx_ack) {
usb_send(&eps[1], "", 1, rx_done, NULL);
queued_tx_ack = 0;
@ -88,6 +97,14 @@ static void receive_frame(void)
}
static void flush_queued_rx(void)
{
if (queued_rx)
receive_frame();
queued_rx = 0;
}
static bool handle_irq(void)
{
uint8_t irq;
@ -109,8 +126,10 @@ static bool handle_irq(void)
}
/* unlikely */
if (eps[1].state != EP_IDLE)
if (eps[1].state != EP_IDLE) {
queued_rx = 1;
return 1;
}
receive_frame();
@ -165,7 +184,9 @@ static void do_tx(void *user)
*/
reg_write(REG_TRX_STATE, TRX_CMD_FORCE_PLL_ON);
flush_queued_rx();
handle_irq();
queued_rx = 0;
spi_begin();
spi_send(AT86RF230_BUF_WRITE);
@ -201,6 +222,7 @@ void mac_reset(void)
mac_irq = NULL;
txing = 0;
queued_tx_ack = 0;
queued_rx = 0;
/* enable CRC and PHY_RSSI (with RX_CRC_VALID) in SPI status return */
reg_write(REG_TRX_CTRL_1,