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cc2420 and cc2430: add comment on why we discard tbiv

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Simon Duquennoy 2015-10-06 16:12:24 +02:00
parent 343326abee
commit ca8fe618e7
3 changed files with 3 additions and 0 deletions
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1
cpu/msp430/cc2420-arch-sfd.c
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@ -45,6 +45,7 @@ ISR(TIMERB1, cc2420_timerb1_interrupt)
ENERGEST_ON(ENERGEST_TYPE_IRQ); ENERGEST_ON(ENERGEST_TYPE_IRQ);
/* always read TBIV to clear IFG */ /* always read TBIV to clear IFG */
tbiv = TBIV; tbiv = TBIV;
/* read and discard tbiv to avoid "variable set but not used" warning */
(void)tbiv; (void)tbiv;
if(CC2420_SFD_IS_1) { if(CC2420_SFD_IS_1) {
cc2420_sfd_counter++; cc2420_sfd_counter++;

1
cpu/msp430/cc2520-arch-sfd.c
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@ -44,6 +44,7 @@ ISR(TIMERB1, cc2520_timerb1_interrupt)
ENERGEST_ON(ENERGEST_TYPE_IRQ); ENERGEST_ON(ENERGEST_TYPE_IRQ);
/* always read TBIV to clear IFG */ /* always read TBIV to clear IFG */
tbiv = TBIV; tbiv = TBIV;
/* read and discard tbiv to avoid "variable set but not used" warning */
(void)tbiv; (void)tbiv;
if(CC2520_SFD_IS_1) { if(CC2520_SFD_IS_1) {
cc2520_sfd_counter++; cc2520_sfd_counter++;

1
dev/cc2520/cc2520.c
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@ -217,6 +217,7 @@ flushrx(void)
uint8_t dummy; uint8_t dummy;
CC2520_READ_FIFO_BYTE(dummy); CC2520_READ_FIFO_BYTE(dummy);
/* read and discard dummy to avoid "variable set but not used" warning */
(void)dummy; (void)dummy;
CC2520_STROBE(CC2520_INS_SFLUSHRX); CC2520_STROBE(CC2520_INS_SFLUSHRX);
CC2520_STROBE(CC2520_INS_SFLUSHRX); CC2520_STROBE(CC2520_INS_SFLUSHRX);