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https://github.com/tinygo-org/tinygo.git
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Ayke van Laethem
77ec9b6369
Do it all at once in preparation for Go 1.18 support. To make this commit, I've simply modified the `fmt-check` Makefile target to rewrite files instead of listing the differences. So this is a fully mechanical change, it should not have introduced any errors.
48 lines
1.3 KiB
Go
48 lines
1.3 KiB
Go
//go:build nrf52840 && nrf52840_reset_uf2
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// +build nrf52840,nrf52840_reset_uf2
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package machine
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import (
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"device/arm"
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"device/nrf"
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)
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const (
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DFU_MAGIC_SERIAL_ONLY_RESET = 0x4e
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DFU_MAGIC_UF2_RESET = 0x57
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DFU_MAGIC_OTA_RESET = 0xA8
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)
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// checkShouldReset is called by the USB-CDC implementation to check whether to
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// reset into the bootloader/OTA and if so, resets the chip appropriately.
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func checkShouldReset() {
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if usbLineInfo.dwDTERate == 1200 && usbLineInfo.lineState&usb_CDC_LINESTATE_DTR == 0 {
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EnterUF2Bootloader()
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}
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}
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// EnterSerialBootloader resets the chip into the serial bootloader. After
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// reset, it can be flashed using serial/nrfutil.
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func EnterSerialBootloader() {
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arm.DisableInterrupts()
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nrf.POWER.GPREGRET.Set(DFU_MAGIC_SERIAL_ONLY_RESET)
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arm.SystemReset()
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}
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// EnterUF2Bootloader resets the chip into the UF2 bootloader. After reset, it
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// can be flashed via nrfutil or by copying a UF2 file to the mass storage device
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func EnterUF2Bootloader() {
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arm.DisableInterrupts()
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nrf.POWER.GPREGRET.Set(DFU_MAGIC_UF2_RESET)
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arm.SystemReset()
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}
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// EnterOTABootloader resets the chip into the bootloader so that it can be
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// flashed via an OTA update
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func EnterOTABootloader() {
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arm.DisableInterrupts()
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nrf.POWER.GPREGRET.Set(DFU_MAGIC_OTA_RESET)
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arm.SystemReset()
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}
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