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change how prepare and transmit work --- Contiki expects to call

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prepare once and then transmit many times to repeat the same packet
over and over. This didn't work like that, but now it does.
This commit is contained in:
maralvira 2010-11-07 20:07:42 +00:00
parent 24b6071234
commit 3b515587c5
1 changed files with 42 additions and 32 deletions
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56
cpu/mc1322x/contiki-maca.c
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@ -30,7 +30,7 @@
*
* This file is part of the Contiki OS.
*
* $Id: contiki-maca.c,v 1.5 2010/11/07 18:34:52 maralvira Exp $
* $Id: contiki-maca.c,v 1.6 2010/11/07 20:07:42 maralvira Exp $
*/
#include <stdint.h>
@ -95,10 +95,9 @@ static volatile uint8_t contiki_maca_request_off = 0;
static process_event_t event_data_ready;
volatile packet_t *prepped_p;
static volatile packet_t prepped_p;
int contiki_maca_init(void) {
prepped_p = 0;
trim_xtal();
vreg_init();
contiki_maca_init();
@ -169,51 +168,62 @@ int contiki_maca_read(void *buf, unsigned short bufsize) {
}
}
/* copies a payload into the prepped packet */
/* transmit sends the prepped packet everytime it is called */
/* Contiki may call prepare once and then transmit several times to send */
/* the same packet repeatedly */
int contiki_maca_prepare(const void *payload, unsigned short payload_len) {
volatile int i;
volatile packet_t *p;
if ((prepped_p == 0)
&& (p = get_free_packet())) {
PRINTF("contiki maca prepare");
#if CONTIKI_MACA_RAW_MODE
p->offset = 1;
p->length = payload_len + 1;
prepped_p.offset = 1;
prepped_p.length = payload_len + 1;
#else
p->offset = 0;
p->length = payload_len;
prepped_p.offset = 0;
prepped_p.length = payload_len;
#endif
if(payload_len > MAX_PACKET_SIZE) return RADIO_TX_ERR;
memcpy((uint8_t *)(p->data + p->offset), payload, payload_len);
memcpy((uint8_t *)(prepped_p.data + prepped_p.offset), payload, payload_len);
#if CONTIKI_MACA_RAW_MODE
p->offset = 0;
p->data[0] = CONTIKI_MACA_PREPEND_BYTE;
prepped_p.offset = 0;
prepped_p.data[0] = CONTIKI_MACA_PREPEND_BYTE;
PRINTF(" raw mode");
#endif
#if CONTIKI_MACA_DEBUG
PRINTF(": sending %d bytes\n\r", payload_len);
for(i = p->offset ; i < (p->length + p->offset); i++) {
PRINTF(" %02x",p->data[i]);
for(i = prepped_p.offset ; i < (prepped_p.length + prepped_p.offset); i++) {
PRINTF(" %02x",prepped_p.data[i]);
}
PRINTF("\n\r");
#endif
prepped_p = p;
return RADIO_TX_OK;
} else {
PRINTF("couldn't get free packet for contiki_maca_send\n\r");
return RADIO_TX_ERR;
}
}
/* gets a packet from the radio (if available), */
/* copies the prepared packet prepped_p */
/* and transmits it */
int contiki_maca_transmit(unsigned short transmit_len) {
volatile packet_t *p;
PRINTF("contiki maca transmit\n\r");
#if BLOCKING_TX
tx_complete = 0;
#endif
tx_packet(prepped_p);
prepped_p = 0;
if(p = get_free_packet()) {
p->offset = prepped_p.offset;
p->length = prepped_p.length;
memcpy((uint8_t *)(p->data + p->offset),
(const uint8_t *)(prepped_p.data + prepped_p.offset),
prepped_p.length);
tx_packet(p);
} else {
PRINTF("couldn't get free packet for transmit\n\r");
return RADIO_TX_ERR;
}
#if BLOCKING_TX
/* block until tx_complete, set by contiki_maca_tx_callback */
/* there are many places in contiki that rely on the */