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usb: remove allocs in ISR

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This commit is contained in:
Kenneth Bell
2022-10-05 16:18:56 +01:00
committed by Ron Evans
parent 7e9d84777e
commit 8f33721b88
3 changed files with 47 additions and 32 deletions
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src/machine/usb/cdc/usbcdc.go
+10 -9
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@@ -129,19 +129,20 @@ func cdcCallbackRx(b []byte) {
}
}
var cdcSetupBuff [cdcLineInfoSize]byte
func cdcSetup(setup usb.Setup) bool {
if setup.BmRequestType == usb_REQUEST_DEVICETOHOST_CLASS_INTERFACE {
if setup.BRequest == usb_CDC_GET_LINE_CODING {
var b [cdcLineInfoSize]byte
b[0] = byte(usbLineInfo.dwDTERate)
b[1] = byte(usbLineInfo.dwDTERate >> 8)
b[2] = byte(usbLineInfo.dwDTERate >> 16)
b[3] = byte(usbLineInfo.dwDTERate >> 24)
b[4] = byte(usbLineInfo.bCharFormat)
b[5] = byte(usbLineInfo.bParityType)
b[6] = byte(usbLineInfo.bDataBits)
cdcSetupBuff[0] = byte(usbLineInfo.dwDTERate)
cdcSetupBuff[1] = byte(usbLineInfo.dwDTERate >> 8)
cdcSetupBuff[2] = byte(usbLineInfo.dwDTERate >> 16)
cdcSetupBuff[3] = byte(usbLineInfo.dwDTERate >> 24)
cdcSetupBuff[4] = byte(usbLineInfo.bCharFormat)
cdcSetupBuff[5] = byte(usbLineInfo.bParityType)
cdcSetupBuff[6] = byte(usbLineInfo.bDataBits)
machine.SendUSBInPacket(0, b[:])
machine.SendUSBInPacket(0, cdcSetupBuff[:])
return true
}
}