chore: add doc note around USB DPSRAM layout

mikesmitty · mikesmitty · commit 3288f5ebe1ae · 2025-08-26T20:37:37.000-04:00
diff --git a/src/machine/machine_rp2_usb.go b/src/machine/machine_rp2_usb.go
@@ -231,6 +231,8 @@ func (dev *USBDevice) ClearStallEPOut(ep uint32) {
 	}
 }
 
+// RP2040: See datasheet section 4.1.2.7.2
+// RP2350: See datasheet section 12.7.3.7.2
 type usbDPSRAM struct {
 	// Note that EPxControl[0] is not EP0Control but 8-byte setup data.
 	EPxControl [16]usbEndpointControlRegister

Original file line number	Diff line number	Diff line change
`@@ -231,6 +231,8 @@ func (dev *USBDevice) ClearStallEPOut(ep uint32) {`
`231`	`231`	`}`
`232`	`232`	`}`
`233`	`233`
	`234`	`+// RP2040: See datasheet section 4.1.2.7.2`
	`235`	`+// RP2350: See datasheet section 12.7.3.7.2`
`234`	`236`	`type usbDPSRAM struct {`
`235`	`237`	`// Note that EPxControl[0] is not EP0Control but 8-byte setup data.`
`236`	`238`	`EPxControl [16]usbEndpointControlRegister`