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avr: prevent race conditions when getting/setting parameters

This commit is contained in:
Bart Van Der Meerssche 2010-12-28 00:34:50 +01:00
parent 1ada193cea
commit 263d3d107a
1 changed files with 35 additions and 7 deletions
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42
mote/v2/avr/ctrl.c
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@ -223,6 +223,7 @@ void ctrlDecode(void)
void ctrlCmdGet(uint8_t cmd)
{
uint8_t i;
uint32_t tmp32;
switch (cmd) {
case 'p':
@ -233,7 +234,12 @@ void ctrlCmdGet(uint8_t cmd)
case 'v':
ctrlReadCharFromRxBuffer(&i);
ctrlWriteLongToTxBuffer(sensor[i].value);
cli();
tmp32 = sensor[i].value;
sei();
ctrlWriteLongToTxBuffer(tmp32);
break;
case 'm':
@ -253,31 +259,53 @@ void ctrlCmdGet(uint8_t cmd)
void ctrlCmdSet(uint8_t cmd)
{
uint8_t i;
uint8_t i, tmp8;
uint16_t tmp16;
uint32_t tmp32;
switch (cmd) {
case 'p':
for (i = 0 ; i < MAX_SENSORS; i++) {
ctrlReadCharFromRxBuffer(&phy_to_log[i]);
ctrlReadCharFromRxBuffer(&tmp8);
cli();
phy_to_log[i] = tmp8;
sei();
}
break;
case 'v':
ctrlReadCharFromRxBuffer(&i);
ctrlReadLongFromRxBuffer((uint32_t *)&sensor[i].value);
ctrlReadLongFromRxBuffer(&tmp32);
cli();
sensor[i].value = tmp32;
sei();
break;
case 'm':
ctrlReadCharFromRxBuffer(&i);
ctrlReadShortFromRxBuffer((uint16_t *)&sensor[i].meterconst);
ctrlReadShortFromRxBuffer(&tmp16);
cli();
sensor[i].meterconst = tmp16;
sei();
break;
case 'w':
ctrlReadShortFromRxBuffer((uint16_t *)&event.wdt);
ctrlReadShortFromRxBuffer(&tmp16);
cli();
event.wdt = tmp16;
sei();
break;
case 'b':
ctrlReadShortFromRxBuffer((uint16_t *)&event.brown_out);
ctrlReadShortFromRxBuffer(&tmp16);
cli();
event.brown_out = tmp16;
sei();
break;
}
}