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added simple surrounding signal strength checking before transmitting

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This commit is contained in:
fros4943 2006-10-09 14:13:04 +00:00
parent 5b66565c86
commit 774b977fe9
1 changed files with 12 additions and 12 deletions
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24
platform/cooja/dev/radio-arch.c
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@ -26,7 +26,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: radio-arch.c,v 1.6 2006/10/06 10:45:53 fros4943 Exp $
* $Id: radio-arch.c,v 1.7 2006/10/09 14:13:04 fros4943 Exp $
*/
#include "dev/radio-arch.h"
@ -44,6 +44,9 @@
#include "sys/log.h"
#define MAX_RETRIES 50
#define SS_INTERFERENCE -150
const struct simInterface radio_interface;
// COOJA variables
@ -56,7 +59,7 @@ char simOutDataBuffer[UIP_BUFSIZE];
int simOutSize;
char simRadioHWOn = 1;
int simSignalStrength = 0;
int simSignalStrength = -200;
char simPower = 100;
/*-----------------------------------------------------------------------------------*/
@ -145,28 +148,25 @@ simDoSend(void)
simOutSize = uip_len;
// Busy-wait while we are receiving
if (simReceiving && simInsideProcessRun) {
if (simReceiving && !simNoYield) {
cooja_mt_yield();
}
// Busy-wait until ether is ready, or die (MAC imitation)
int retries=0;
/* while (retries < 5 && simSignalStrength > -80) {
// TODO Retry and signal strength threshold values?
retries++;
printf("WAITING FOR ETHER! (null)\n");
cooja_mt_yield();
while (retries < MAX_RETRIES && simSignalStrength > SS_INTERFERENCE && !simNoYield) {
retries++;
cooja_mt_yield();
}
if (simSignalStrength > -80) {
return UIP_FW_DROPPED;
if (simSignalStrength > SS_INTERFERENCE) {
return UIP_FW_DROPPED;
}
*/
// - Initiate transmission -
simTransmitting = 1;
// Busy-wait while transmitting
if (simTransmitting && simInsideProcessRun) {
if (simTransmitting && !simNoYield) {
cooja_mt_yield();
}