chore: fix copy/paste typo

Author: mikesmitty

src/machine/machine_rp2_usb.go

@@ -119,7 +119,6 @@ func handleEndpointRx(ep uint32) []byte {
 
 // AckUsbOutTransfer is called to acknowledge the completion of a USB OUT transfer.
 func AckUsbOutTransfer(ep uint32) {
-	ep = ep & 0x7F
 	setOutEPDataPID(ep, !outEpXdata0[ep])
 }
 
@@ -131,7 +130,7 @@ func setInEPDataPID(ep uint32, dataOne usbPID) {
 		_usbDPSRAM.EPxBufferControl[ep].In.SetBits(usbBuf0CtrlData1Pid)
 	}
 
-	_usbDPSRAM.EPxBufferControl[ep].Out.SetBits(usbBuf0CtrlAvail)
+	_usbDPSRAM.EPxBufferControl[ep].In.SetBits(usbBuf0CtrlAvail)
 }
 
 // Set the USB endpoint Packet ID to DATA0 or DATA1.
@@ -169,6 +168,7 @@ func sendViaEPIn(ep uint32, data []byte, count int) {
 
 // Set ENDPOINT_HALT/stall status on a USB IN endpoint.
 func (dev *USBDevice) SetStallEPIn(ep uint32) {
+	// Drop the endpoint in bit (0x80)
 	ep = ep & 0x7F
 	// Prepare buffer control register value
 	if ep == 0 {
@@ -182,7 +182,6 @@ func (dev *USBDevice) SetStallEPIn(ep uint32) {
 
 // Set ENDPOINT_HALT/stall status on a USB OUT endpoint.
 func (dev *USBDevice) SetStallEPOut(ep uint32) {
-	ep = ep & 0x7F
 	if ep == 0 {
 		panic("SetStallEPOut: EP0 OUT not valid")
 	}
@@ -192,6 +191,7 @@ func (dev *USBDevice) SetStallEPOut(ep uint32) {
 
 // Clear the ENDPOINT_HALT/stall on a USB IN endpoint.
 func (dev *USBDevice) ClearStallEPIn(ep uint32) {
+	// Drop the endpoint in bit (0x80)
 	ep = ep & 0x7F
 	val := uint32(usbBuf0CtrlStall)
 	_usbDPSRAM.EPxBufferControl[ep].In.ClearBits(val)
@@ -203,7 +203,6 @@ func (dev *USBDevice) ClearStallEPIn(ep uint32) {
 
 // Clear the ENDPOINT_HALT/stall on a USB OUT endpoint.
 func (dev *USBDevice) ClearStallEPOut(ep uint32) {
-	ep = ep & 0x7F
 	val := uint32(usbBuf0CtrlStall)
 	_usbDPSRAM.EPxBufferControl[ep].Out.ClearBits(val)
 	if outEpXPIDReset[ep] {