use synchronous transmission.
This commit is contained in:
nvt-se
parent
2a0351afb4
commit
5f1ca4ccdf
3 changed files with 51 additions and 78 deletions
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@ -90,6 +90,8 @@ static volatile uint8_t rssi;
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// callback when a packet has been received
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static uint8_t cc1020_pa_power = PA_POWER;
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static int dma_done;
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static void (*receiver_callback)(const struct radio_driver *);
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const struct radio_driver cc1020_driver =
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@ -101,7 +103,11 @@ const struct radio_driver cc1020_driver =
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cc1020_off
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};
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PROCESS(cc1020_sender_process, "CC1020 sender");
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static void
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dma_callback(void)
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{
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dma_done = 1;
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}
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void
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cc1020_init(const uint8_t *config)
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@ -127,7 +133,7 @@ cc1020_init(const uint8_t *config)
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// power down
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cc1020_setupPD();
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process_start(&cc1020_sender_process, NULL);
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dma_subscribe(0, dma_callback);
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}
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void
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@ -236,8 +242,38 @@ cc1020_send(const void *buf, unsigned short len)
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cc1020_txbuf[cc1020_txlen++] = TAIL;
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cc1020_txbuf[cc1020_txlen++] = TAIL;
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//process_poll(&cc1020_sender_process);
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process_post_synch(&cc1020_sender_process, PROCESS_EVENT_POLL, NULL);
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cc1020_set_rx();
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if ((cc1020_state & CC1020_RX_SEARCHING) == 0) {
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// Wait until the receiver is idle.
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while (cc1020_state & CC1020_RX_SEARCHING);
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// Wait for the medium to become idle.
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while (cc1020_carrier_sense());
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// Then wait for a short pseudo-random time before sending.
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clock_delay(1 + 10 * (random_rand() & 0xff));
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}
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// Switch to transceive mode.
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cc1020_set_tx();
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// Initiate radio transfer.
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dma_done = 0;
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dma_transfer(&TXBUF0, cc1020_txbuf, cc1020_txlen);
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while (!dma_done);
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ENERGEST_OFF(ENERGEST_TYPE_TRANSMIT);
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RIMESTATS_ADD(lltx);
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// clean up
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cc1020_txlen = 0;
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if (cc1020_state & CC1020_TURN_OFF) {
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CC1020_SET_OPSTATE(CC1020_RX | CC1020_RX_SEARCHING);
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cc1020_off();
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} else {
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cc1020_set_rx();
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}
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return len;
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}
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@ -418,62 +454,6 @@ interrupt(UART0RX_VECTOR) cc1020_rxhandler(void)
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}
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}
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PROCESS_THREAD(cc1020_sender_process, ev, data)
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{
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int i;
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PROCESS_BEGIN();
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dma_subscribe(0, &cc1020_sender_process);
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while (1) {
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PROCESS_WAIT_UNTIL(cc1020_txlen > 0 && cc1020_state != CC1020_OFF);
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cc1020_set_rx();
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if((cc1020_state & CC1020_RX_SEARCHING) == 0) {
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// Wait until the receiver is idle.
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PROCESS_WAIT_UNTIL(cc1020_state & CC1020_RX_SEARCHING);
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// Wait for the medium to become idle.
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while (cc1020_carrier_sense());
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// Then wait for a short pseudo-random time before sending.
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clock_delay(1 + 10 * (random_rand() & 0xff));
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}
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// Switch to transceive mode.
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cc1020_set_tx();
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#if 0
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U0CTL &= ~SWRST;
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for (i = 0; i < cc1020_txlen; i++) {
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UART0_TX = cc1020_txbuf[i];
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UART0_WAIT_TX();
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}
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#endif
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// Initiate radio transfer.
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dma_transfer(&TXBUF0, cc1020_txbuf, cc1020_txlen);
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// wait for DMA0 to finish
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PROCESS_WAIT_UNTIL(ev == dma_event);
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ENERGEST_OFF(ENERGEST_TYPE_TRANSMIT);
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RIMESTATS_ADD(lltx);
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// clean up
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cc1020_txlen = 0;
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if (cc1020_state & CC1020_TURN_OFF) {
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CC1020_SET_OPSTATE(CC1020_RX | CC1020_RX_SEARCHING);
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cc1020_off();
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} else {
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cc1020_set_rx();
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}
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}
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PROCESS_END();
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}
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static void
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cc1020_write_reg(uint8_t addr, uint8_t adata)
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{
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@ -44,31 +44,30 @@
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#include "dev/cc1020.h"
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#include "dev/dma.h"
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static struct process *subscribers[DMA_LINES];
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process_event_t dma_event;
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static void (*callbacks[DMA_LINES])(void);
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interrupt(DACDMA_VECTOR) irq_dacdma(void)
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{
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if (DMA0CTL & DMAIFG) {
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DMA0CTL &= ~(DMAIFG | DMAIE);
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if (subscribers[0] != NULL) {
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process_post(subscribers[0], dma_event, NULL);
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if (callbacks[0] != NULL) {
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callbacks[0]();
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}
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LPM_AWAKE();
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}
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if (DMA1CTL & DMAIFG) {
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DMA1CTL &= ~(DMAIFG | DMAIE);
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if (subscribers[1] != NULL) {
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process_post(subscribers[1], dma_event, NULL);
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if (callbacks[1] != NULL) {
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callbacks[1]();
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}
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LPM_AWAKE();
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}
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if (DMA2CTL & DMAIFG) {
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DMA2CTL &= ~(DMAIFG | DMAIE);
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if (subscribers[2] != NULL) {
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process_post(subscribers[2], dma_event, NULL);
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if (callbacks[2] != NULL) {
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callbacks[2]();
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}
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LPM_AWAKE();
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}
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@ -82,19 +81,13 @@ interrupt(DACDMA_VECTOR) irq_dacdma(void)
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}
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}
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void
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dma_init(void)
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{
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dma_event = process_alloc_event();
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}
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int
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dma_subscribe(int line, struct process *p)
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dma_subscribe(int line, void (*callback)(void))
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{
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if (line >= DMA_LINES)
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return -1;
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subscribers[line] = p;
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callbacks[line] = callback;
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return 0;
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}
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@ -28,7 +28,7 @@
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*
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* This file is part of the Contiki operating system.
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*
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* $Id: dma.h,v 1.5 2007/11/06 15:08:56 nvt-se Exp $
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* $Id: dma.h,v 1.6 2007/12/17 15:26:47 nvt-se Exp $
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*/
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#ifndef DMA_H
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@ -37,7 +37,7 @@
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#define DMA_LINES 2
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void dma_init(void);
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int dma_subscribe(int, struct process *);
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int dma_subscribe(int, void (*)(void));
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void dma_transfer(unsigned char *, unsigned char *, unsigned);
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extern process_event_t dma_event;
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