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CC2420: The crystal oscillator only needs to stabilize at startup

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This commit is contained in:
kkrentz 2013-05-25 06:37:08 -07:00
parent 06d3225aa7
commit b53e35b2a0
1 changed files with 3 additions and 12 deletions
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15
dev/cc2420/cc2420.c
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@ -373,8 +373,6 @@ on(void)
CC2420_ENABLE_FIFOP_INT(); CC2420_ENABLE_FIFOP_INT();
strobe(CC2420_SRXON); strobe(CC2420_SRXON);
wait_for_status(BV(CC2420_XOSC16M_STABLE));
ENERGEST_ON(ENERGEST_TYPE_LISTEN); ENERGEST_ON(ENERGEST_TYPE_LISTEN);
receive_on = 1; receive_on = 1;
} }
@ -452,6 +450,8 @@ cc2420_init(void)
/* Turn on the crystal oscillator. */ /* Turn on the crystal oscillator. */
strobe(CC2420_SXOSCON); strobe(CC2420_SXOSCON);
/* And wait until it stabilizes */
wait_for_status(BV(CC2420_XOSC16M_STABLE));
/* Turn on/off automatic packet acknowledgment and address decoding. */ /* Turn on/off automatic packet acknowledgment and address decoding. */
reg = getreg(CC2420_MDMCTRL0); reg = getreg(CC2420_MDMCTRL0);
@ -697,11 +697,7 @@ cc2420_set_channel(int c)
channel = c; channel = c;
f = 5 * (c - 11) + 357 + 0x4000; f = 5 * (c - 11) + 357 + 0x4000;
/*
* Writing RAM requires crystal oscillator to be stable.
*/
wait_for_status(BV(CC2420_XOSC16M_STABLE));
/* Wait for any transmission to end. */ /* Wait for any transmission to end. */
wait_for_transmission(); wait_for_transmission();
@ -724,11 +720,6 @@ cc2420_set_pan_addr(unsigned pan,
{ {
GET_LOCK(); GET_LOCK();
/*
* Writing RAM requires crystal oscillator to be stable.
*/
wait_for_status(BV(CC2420_XOSC16M_STABLE));
write_ram((uint8_t *) &pan, CC2420RAM_PANID, 2, CC2420_WRITE_RAM_IN_ORDER); write_ram((uint8_t *) &pan, CC2420RAM_PANID, 2, CC2420_WRITE_RAM_IN_ORDER);
write_ram((uint8_t *) &addr, CC2420RAM_SHORTADDR, 2, CC2420_WRITE_RAM_IN_ORDER); write_ram((uint8_t *) &addr, CC2420RAM_SHORTADDR, 2, CC2420_WRITE_RAM_IN_ORDER);