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