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machine: fix usb truncation?

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Remove the sendUSBPacket maxLen param because this greatly confused the compiler.
It also fixes a bug where the length provided to the hardware may not match the length of the packet.
sendUSBPacket now panics if the sent packet is too big.

I also fixed some of the string descriptor logic where we could create a packet without fully populating it.

RP2* systems might require some more work since they are implemented very differently?
I don't have any of those to test with yet, so maybe someone can deal with them in a seperate PR?
This commit is contained in:
Nia Waldvogel
2025-12-30 15:51:27 -05:00
committed by Ron Evans
parent c7f62bae9b
commit 8ef36ed939
8 changed files with 130 additions and 98 deletions
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src/machine/machine_rp2350_usb.go
+1 -1
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@@ -131,7 +131,7 @@ func handleUSBSetAddress(setup usb.Setup) bool {
const ackTimeout = 570
rp.USB.SIE_STATUS.Set(rp.USB_SIE_STATUS_ACK_REC)
sendUSBPacket(0, []byte{}, 0)
sendUSBPacket(0, []byte{})
// Wait for transfer to complete with a timeout.
t := timer.timeElapsed()