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Much more efficient algorithm for the Endpoint/Pipe configuration routine of unordered endpoints/pipes - only reconfigure the endpoints and pipes above the newly configured endpoint/pipe, and don't cache existing endpoint/pipe configuration before use to save SRAM.

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This commit is contained in:
Dean Camera 2010-12-24 18:06:55 +00:00
parent 5489af7fa0
commit bfa622d27e
2 changed files with 70 additions and 80 deletions
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87
LUFA/Drivers/USB/LowLevel/Pipe.c
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@ -56,58 +56,53 @@ bool Pipe_ConfigurePipe(const uint8_t Number,
Pipe_SetInfiniteINRequests();
return Pipe_IsConfigured();
#else
uint8_t UPCFG0XTemp[PIPE_TOTAL_PIPES];
uint8_t UPCFG1XTemp[PIPE_TOTAL_PIPES];
uint8_t UPCFG2XTemp[PIPE_TOTAL_PIPES];
uint8_t UPCONXTemp[PIPE_TOTAL_PIPES];
uint8_t UPINRQXTemp[PIPE_TOTAL_PIPES];
uint8_t UPIENXTemp[PIPE_TOTAL_PIPES];
for (uint8_t PNum = 0; PNum < PIPE_TOTAL_PIPES; PNum++)
#else
for (uint8_t PNum = Number; PNum < PIPE_TOTAL_PIPES; PNum++)
{
Pipe_SelectPipe(PNum);
UPCFG0XTemp[PNum] = UPCFG0X;
UPCFG1XTemp[PNum] = UPCFG1X;
UPCFG2XTemp[PNum] = UPCFG2X;
UPCONXTemp[PNum] = UPCONX;
UPINRQXTemp[PNum] = UPINRQX;
UPIENXTemp[PNum] = UPIENX;
}
UPCFG0XTemp[Number] = ((Type << EPTYPE0) | Token | ((EndpointNumber & PIPE_EPNUM_MASK) << PEPNUM0));
UPCFG1XTemp[Number] = ((1 << ALLOC) | Banks | Pipe_BytesToEPSizeMask(Size));
UPCFG2XTemp[Number] = 0;
UPCONXTemp[Number] = (1 << INMODE);
UPINRQXTemp[Number] = 0;
UPIENXTemp[Number] = 0;
for (uint8_t PNum = 0; PNum < PIPE_TOTAL_PIPES; PNum++)
{
Pipe_SelectPipe(PNum);
UPIENX = 0;
UPINTX = 0;
UPCFG1X = 0;
Pipe_DisablePipe();
}
uint8_t UPCFG0XTemp;
uint8_t UPCFG1XTemp;
uint8_t UPCFG2XTemp;
uint8_t UPCONXTemp;
uint8_t UPINRQXTemp;
uint8_t UPIENXTemp;
for (uint8_t PNum = 0; PNum < PIPE_TOTAL_PIPES; PNum++)
{
if (!(UPCFG1XTemp[PNum] & (1 << ALLOC)))
continue;
Pipe_SelectPipe(PNum);
Pipe_SelectPipe(PNum);
Pipe_EnablePipe();
if (PNum == Number)
{
UPCFG0XTemp = ((Type << EPTYPE0) | Token | ((EndpointNumber & PIPE_EPNUM_MASK) << PEPNUM0));
UPCFG1XTemp = ((1 << ALLOC) | Banks | Pipe_BytesToEPSizeMask(Size));
UPCFG2XTemp = 0;
UPCONXTemp = ((1 << PEN) | (1 << INMODE));
UPINRQXTemp = 0;
UPIENXTemp = 0;
}
else
{
UPCFG0XTemp = UPCFG0X;
UPCFG1XTemp = UPCFG1X;
UPCFG2XTemp = UPCFG2X;
UPCONXTemp = UPCONX;
UPINRQXTemp = UPINRQX;
UPIENXTemp = UPIENX;
}
UPCFG0X = UPCFG0XTemp[PNum];
UPCFG1X = UPCFG1XTemp[PNum];
UPCFG2X = UPCFG2XTemp[PNum];
UPCONX |= UPCONXTemp[PNum];
UPINRQX = UPINRQXTemp[PNum];
UPIENX = UPIENXTemp[PNum];
if (!(UPCFG1XTemp & (1 << ALLOC)))
continue;
Pipe_DisablePipe();
UPCFG1X &= (1 << ALLOC);
Pipe_EnablePipe();
UPCFG0X = UPCFG0XTemp;
UPCFG1X = UPCFG1XTemp;
UPCFG2X = UPCFG2XTemp;
UPCONX = UPCONXTemp;
UPINRQX = UPINRQXTemp;
UPIENX = UPIENXTemp;
if (!(Pipe_IsConfigured()))
return false;
return false;
}
Pipe_SelectPipe(Number);