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| author | deadprogram <[email protected]> | 2023-07-04 21:44:20 +0200 |
|---|---|---|
| committer | Ron Evans <[email protected]> | 2023-07-07 22:13:26 +0200 |
| commit | c83f712c17b6024d2cc3130db1d7bb0899e7b419 (patch) | |
| tree | 1752868254210e91b44db3531eb5d462bb4fa5d2 | |
| parent | fffad84a63488d2ffd6d143229412dc0913d5458 (diff) | |
| download | tinygo-c83f712c17b6024d2cc3130db1d7bb0899e7b419.tar.gz tinygo-c83f712c17b6024d2cc3130db1d7bb0899e7b419.zip | |
machine/rp2040: wait for 1000 us after flash reset to avoid issues with busy USB bus
Signed-off-by: deadprogram <[email protected]>
| -rw-r--r-- | src/machine/machine_rp2040_usb_fix_usb_device_enumeration.go | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/machine/machine_rp2040_usb_fix_usb_device_enumeration.go b/src/machine/machine_rp2040_usb_fix_usb_device_enumeration.go index c67cfe1d3..eedcc4d21 100644 --- a/src/machine/machine_rp2040_usb_fix_usb_device_enumeration.go +++ b/src/machine/machine_rp2040_usb_fix_usb_device_enumeration.go @@ -3,6 +3,7 @@ package machine import ( + "device/arm" "device/rp" ) @@ -87,6 +88,7 @@ func hw_enumeration_fix_force_ls_j() { rp.USBCTRL_REGS.USB_MUXING.Set(rp.USBCTRL_REGS_USB_MUXING_TO_DIGITAL_PAD | rp.USBCTRL_REGS_USB_MUXING_SOFTCON) // LS_J is now forced but while loop here just to check + waitCycles(125000) // if timer pool disabled, or no timer available, have to busy wait. hw_enumeration_fix_finish() @@ -109,3 +111,10 @@ func hw_enumeration_fix_finish() { // Restore the pad ctrl value padsBank0.io[dp].Set(padCtrlPrev) } + +func waitCycles(n int) { + for n > 0 { + arm.Asm("nop") + n-- + } +} |