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Interrupt time improvements

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This commit is contained in:
Jan Dümpelmann 2020-05-15 18:21:44 +02:00
parent 3401e0f6ff
commit 28696de390
1 changed files with 9 additions and 4 deletions
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13
src/portable/st/synopsys/dcd_synopsys.c
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@ -708,14 +708,19 @@ void dcd_int_handler(uint8_t rhport) {
}
#endif
// Use while loop to handle more than one fifo data entry
// within a single interrupt call
while(USB_OTG_FS->GINTSTS & USB_OTG_GINTSTS_RXFLVL) {
// RxFIFO non-empty interrupt handling.
if(int_status & USB_OTG_GINTSTS_RXFLVL) {
// RXFLVL bit is read-only
// Mask out RXFLVL while reading data from FIFO
USB_OTG_FS->GINTMSK &= ~USB_OTG_GINTMSK_RXFLVLM;
handle_rxflvl_ints(out_ep);
// Loop until all available packets were handled
do {
handle_rxflvl_ints(out_ep);
int_status = USB_OTG_FS->GINTSTS;
} while(int_status & USB_OTG_GINTSTS_RXFLVL);
USB_OTG_FS->GINTMSK |= USB_OTG_GINTMSK_RXFLVLM;
}