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use synchronous transmission.

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This commit is contained in:
nvt-se 2007-12-17 15:26:47 +00:00
parent 2a0351afb4
commit 5f1ca4ccdf
3 changed files with 51 additions and 78 deletions
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100
platform/msb430/dev/cc1020.c
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@ -90,6 +90,8 @@ static volatile uint8_t rssi;
// callback when a packet has been received
static uint8_t cc1020_pa_power = PA_POWER;
static int dma_done;
static void (*receiver_callback)(const struct radio_driver *);
const struct radio_driver cc1020_driver =
@ -101,7 +103,11 @@ const struct radio_driver cc1020_driver =
cc1020_off
};
PROCESS(cc1020_sender_process, "CC1020 sender");
static void
dma_callback(void)
{
dma_done = 1;
}
void
cc1020_init(const uint8_t *config)
@ -127,7 +133,7 @@ cc1020_init(const uint8_t *config)
// power down
cc1020_setupPD();
process_start(&cc1020_sender_process, NULL);
dma_subscribe(0, dma_callback);
}
void
@ -236,8 +242,38 @@ cc1020_send(const void *buf, unsigned short len)
cc1020_txbuf[cc1020_txlen++] = TAIL;
cc1020_txbuf[cc1020_txlen++] = TAIL;
//process_poll(&cc1020_sender_process);
process_post_synch(&cc1020_sender_process, PROCESS_EVENT_POLL, NULL);
cc1020_set_rx();
if ((cc1020_state & CC1020_RX_SEARCHING) == 0) {
// Wait until the receiver is idle.
while (cc1020_state & CC1020_RX_SEARCHING);
// Wait for the medium to become idle.
while (cc1020_carrier_sense());
// Then wait for a short pseudo-random time before sending.
clock_delay(1 + 10 * (random_rand() & 0xff));
}
// Switch to transceive mode.
cc1020_set_tx();
// Initiate radio transfer.
dma_done = 0;
dma_transfer(&TXBUF0, cc1020_txbuf, cc1020_txlen);
while (!dma_done);
ENERGEST_OFF(ENERGEST_TYPE_TRANSMIT);
RIMESTATS_ADD(lltx);
// clean up
cc1020_txlen = 0;
if (cc1020_state & CC1020_TURN_OFF) {
CC1020_SET_OPSTATE(CC1020_RX | CC1020_RX_SEARCHING);
cc1020_off();
} else {
cc1020_set_rx();
}
return len;
}
@ -418,62 +454,6 @@ interrupt(UART0RX_VECTOR) cc1020_rxhandler(void)
}
}
PROCESS_THREAD(cc1020_sender_process, ev, data)
{
int i;
PROCESS_BEGIN();
dma_subscribe(0, &cc1020_sender_process);
while (1) {
PROCESS_WAIT_UNTIL(cc1020_txlen > 0 && cc1020_state != CC1020_OFF);
cc1020_set_rx();
if((cc1020_state & CC1020_RX_SEARCHING) == 0) {
// Wait until the receiver is idle.
PROCESS_WAIT_UNTIL(cc1020_state & CC1020_RX_SEARCHING);
// Wait for the medium to become idle.
while (cc1020_carrier_sense());
// Then wait for a short pseudo-random time before sending.
clock_delay(1 + 10 * (random_rand() & 0xff));
}
// Switch to transceive mode.
cc1020_set_tx();
#if 0
U0CTL &= ~SWRST;
for (i = 0; i < cc1020_txlen; i++) {
UART0_TX = cc1020_txbuf[i];
UART0_WAIT_TX();
}
#endif
// Initiate radio transfer.
dma_transfer(&TXBUF0, cc1020_txbuf, cc1020_txlen);
// wait for DMA0 to finish
PROCESS_WAIT_UNTIL(ev == dma_event);
ENERGEST_OFF(ENERGEST_TYPE_TRANSMIT);
RIMESTATS_ADD(lltx);
// clean up
cc1020_txlen = 0;
if (cc1020_state & CC1020_TURN_OFF) {
CC1020_SET_OPSTATE(CC1020_RX | CC1020_RX_SEARCHING);
cc1020_off();
} else {
cc1020_set_rx();
}
}
PROCESS_END();
}
static void
cc1020_write_reg(uint8_t addr, uint8_t adata)
{