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atusb/fw/mac.c: reserved code 0 and added notification of TX completion

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- mac.c (queued_tx_ack, rx_done, handle_irq): on TX completion, send a
  a zero byte on EP 1
- mac.c (handle_irq): don't receive zero-sized frames (they're
  malformed anyway), so that size zero can be used to signal TX
  completion
This commit is contained in:
Werner Almesberger 2011-07-13 14:22:49 -03:00
parent 23c24f65aa
commit eeeb5599f8
1 changed files with 13 additions and 1 deletions
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14
atusb/fw/mac.c
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@ -28,6 +28,7 @@ static uint8_t rx_buf[MAX_PSDU+2]; /* PHDR+payload+LQ */
static uint8_t tx_buf[MAX_PSDU];
static uint8_t tx_size = 0;
static int txing = 0;
static int queued_tx_ack = 0;
static uint8_t reg_read(uint8_t reg)
@ -55,6 +56,10 @@ static void reg_write(uint8_t reg, uint8_t value)
static void rx_done(void *user)
{
led(0);
if (queued_tx_ack) {
usb_send(&eps[1], "", 1, rx_done, NULL);
queued_tx_ack = 0;
}
}
@ -64,6 +69,13 @@ static int handle_irq(void)
uint8_t size, i;
if (txing) {
if (eps[1].state == EP_IDLE)
usb_send(&eps[1], "", 1, rx_done, NULL);
else {
if (queued_tx_ack)
panic();
queued_tx_ack = 1;
}
txing = 0;
return 0;
}
@ -79,7 +91,7 @@ static int handle_irq(void)
spi_begin();
spi_send(AT86RF230_BUF_READ);
size = spi_recv();
if (size & 0x80) {
if (!size || (size & 0x80)) {
spi_end();
return 1;
}