Skip TXFE for EP0

HiFiPhile · HiFiPhile · commit be4b38c54dc4 · 2025-10-31T10:56:48.000+01:00
Signed-off-by: HiFiPhile &lt;admin@hifiphile.com&gt;
diff --git a/src/portable/synopsys/dwc2/dcd_dwc2.c b/src/portable/synopsys/dwc2/dcd_dwc2.c
@@ -419,7 +419,8 @@ static void edpt_schedule_packets(uint8_t rhport, const uint8_t epnum, const uin
       const uint16_t xferred_bytes = epin_write_tx_fifo(rhport, epnum);
 
       // Enable TXFE interrupt if there are still data to be sent
-      if (xfer->total_len - xferred_bytes > 0) {
+      // EP0 only sends one packet at a time, so no need to check for EP0
+      if ((epnum != 0) && (xfer->total_len - xferred_bytes > 0)) {
          dwc2->diepempmsk |= (1u << epnum);
       }
     }

Original file line number	Diff line number	Diff line change
`@@ -419,7 +419,8 @@ static void edpt_schedule_packets(uint8_t rhport, const uint8_t epnum, const uin`
`419`	`419`	`const uint16_t xferred_bytes = epin_write_tx_fifo(rhport, epnum);`
`420`	`420`
`421`	`421`	`// Enable TXFE interrupt if there are still data to be sent`
`422`		`- if (xfer->total_len - xferred_bytes > 0) {`
	`422`	`+ // EP0 only sends one packet at a time, so no need to check for EP0`
	`423`	`+ if ((epnum != 0) && (xfer->total_len - xferred_bytes > 0)) {`
`423`	`424`	`dwc2->diepempmsk \|= (1u << epnum);`
`424`	`425`	`}`
`425`	`426`	`}`