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Changed AVRISP-MKII project to use the Watchdog interrupt for command timeouts, to reduce CPU usage and free timer 0 for other uses in the future.

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This commit is contained in:
Dean Camera 2011-01-22 17:48:06 +00:00
parent ef44b8c036
commit 26017b68b0
10 changed files with 37 additions and 35 deletions
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10
Projects/AVRISP-MKII/Lib/ISP/ISPProtocol.c
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@ -68,15 +68,14 @@ void ISPProtocol_EnterISPMode(void)
ISPProtocol_DelayMS(Enter_ISP_Params.ExecutionDelayMS);
ISPTarget_EnableTargetISP();
ISPTarget_ChangeTargetResetLine(true);
/* Continuously attempt to synchronize with the target until either the number of attempts specified
* by the host has exceeded, or the the device sends back the expected response values */
while (Enter_ISP_Params.SynchLoops-- && (ResponseStatus != STATUS_CMD_OK) && TimeoutTicksRemaining)
while (Enter_ISP_Params.SynchLoops-- && (ResponseStatus != STATUS_CMD_OK) && !(TimeoutExpired))
{
uint8_t ResponseBytes[4];
ISPTarget_ChangeTargetResetLine(true);
ISPProtocol_DelayMS(Enter_ISP_Params.PinStabDelayMS);
for (uint8_t RByte = 0; RByte < sizeof(ResponseBytes); RByte++)
{
ISPProtocol_DelayMS(Enter_ISP_Params.ByteDelay);
@ -92,6 +91,7 @@ void ISPProtocol_EnterISPMode(void)
{
ISPTarget_ChangeTargetResetLine(false);
ISPProtocol_DelayMS(Enter_ISP_Params.PinStabDelayMS);
ISPTarget_ChangeTargetResetLine(true);
}
}
@ -509,7 +509,7 @@ void ISPProtocol_SPIMulti(void)
*/
void ISPProtocol_DelayMS(uint8_t DelayMS)
{
while (DelayMS-- && TimeoutTicksRemaining)
while (DelayMS-- && !(TimeoutExpired))
_delay_ms(1);
}