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atsamd21, atsamd51: add support for USB INTERRUPT OUT #3908

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merged 1 commit into from
Sep 16, 2023
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atsamd21, atsamd51: add support for USB INTERRUPT OUT #3908

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2 changes: 1 addition & 1 deletion builder/sizes_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -43,7 +43,7 @@ func TestBinarySize(t *testing.T) {
// microcontrollers
{"hifive1b", "examples/echo", 4612, 280, 0, 2252},
{"microbit", "examples/serial", 2724, 388, 8, 2256},
{"wioterminal", "examples/pininterrupt", 6039, 1485, 116, 6816},
{"wioterminal", "examples/pininterrupt", 6063, 1485, 116, 6816},

// TODO: also check wasm. Right now this is difficult, because
// wasm binaries are run through wasm-opt and therefore the
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18 changes: 17 additions & 1 deletion src/machine/machine_atsamd21_usb.go
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Expand Up @@ -225,7 +225,23 @@ func initEndpoint(ep, config uint32) {
setEPSTATUSCLR(ep, sam.USB_DEVICE_EPSTATUSCLR_BK0RDY)

case usb.ENDPOINT_TYPE_INTERRUPT | usb.EndpointOut:
// TODO: not really anything, seems like...
// set packet size
usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE.SetBits(epPacketSize(64) << usb_DEVICE_PCKSIZE_SIZE_Pos)

// set data buffer address
usbEndpointDescriptors[ep].DeviceDescBank[0].ADDR.Set(uint32(uintptr(unsafe.Pointer(&udd_ep_out_cache_buffer[ep]))))

// set endpoint type
setEPCFG(ep, ((usb.ENDPOINT_TYPE_INTERRUPT + 1) << sam.USB_DEVICE_EPCFG_EPTYPE0_Pos))

// receive interrupts when current transfer complete
setEPINTENSET(ep, sam.USB_DEVICE_EPINTENSET_TRCPT0)

// set byte count to zero, we have not received anything yet
usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE.ClearBits(usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask << usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos)

// ready for next transfer
setEPSTATUSCLR(ep, sam.USB_DEVICE_EPSTATUSCLR_BK0RDY)

case usb.ENDPOINT_TYPE_BULK | usb.EndpointIn:
// set packet size
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18 changes: 17 additions & 1 deletion src/machine/machine_atsamd51_usb.go
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Expand Up @@ -228,7 +228,23 @@ func initEndpoint(ep, config uint32) {
setEPSTATUSCLR(ep, sam.USB_DEVICE_ENDPOINT_EPSTATUSCLR_BK0RDY)

case usb.ENDPOINT_TYPE_INTERRUPT | usb.EndpointOut:
// TODO: not really anything, seems like...
// set packet size
usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE.SetBits(epPacketSize(64) << usb_DEVICE_PCKSIZE_SIZE_Pos)

// set data buffer address
usbEndpointDescriptors[ep].DeviceDescBank[0].ADDR.Set(uint32(uintptr(unsafe.Pointer(&udd_ep_out_cache_buffer[ep]))))

// set endpoint type
setEPCFG(ep, ((usb.ENDPOINT_TYPE_INTERRUPT + 1) << sam.USB_DEVICE_ENDPOINT_EPCFG_EPTYPE0_Pos))

// receive interrupts when current transfer complete
setEPINTENSET(ep, sam.USB_DEVICE_ENDPOINT_EPINTENSET_TRCPT0)

// set byte count to zero, we have not received anything yet
usbEndpointDescriptors[ep].DeviceDescBank[0].PCKSIZE.ClearBits(usb_DEVICE_PCKSIZE_BYTE_COUNT_Mask << usb_DEVICE_PCKSIZE_BYTE_COUNT_Pos)

// ready for next transfer
setEPSTATUSCLR(ep, sam.USB_DEVICE_ENDPOINT_EPSTATUSCLR_BK0RDY)

case usb.ENDPOINT_TYPE_BULK | usb.EndpointIn:
// set packet size
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