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atusb/fw/mac.c (next_buf): dedicated function for incrementing buffer indices

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This commit is contained in:
Werner Almesberger 2013-07-24 16:21:38 -03:00
parent b73d5fc1af
commit 998ac7e5c6
1 changed files with 14 additions and 3 deletions
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17
atusb/fw/mac.c
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@ -29,7 +29,6 @@ bool (*mac_irq)(void) = NULL;
static uint8_t rx_buf[RX_BUFS][MAX_PSDU+2]; /* PHDR+payload+LQ */
static bool rx_in = 0, rx_out = 0;
static uint8_t tx_buf[MAX_PSDU];
static uint8_t tx_size = 0;
static bool txing = 0;
@ -37,6 +36,18 @@ static bool queued_tx_ack = 0;
static uint8_t next_seq, this_seq, queued_seq;
/* ----- Receive buffer management ----------------------------------------- */
static uint8_t rx_in = 0, rx_out = 0;
static inline void next_buf(uint8_t *index)
{
*index = (*index+1) % RX_BUFS;
}
/* ----- Register access --------------------------------------------------- */
@ -95,7 +106,7 @@ static void tx_ack_done(void *user)
static void rx_done(void *user)
{
led(0);
rx_out = (rx_out+1) & (RX_BUFS-1);
next_buf(&rx_out);
usb_next();
}
@ -122,7 +133,7 @@ static void receive_frame(void)
spi_end();
buf[0] = size;
rx_in = (rx_in+1) & (RX_BUFS-1);
next_buf(&rx_in);
if (eps[1].state == EP_IDLE)
usb_next();