EFM32
来自Jack's Lab
目录 |
1 Overview
EFM32HG:
- ARM Cortex-M+ @ 25 MHz
- Crystalless USB w/ built-in 3.3V regulator for minimal part count
- 64/32 kB flash, 8/4 kB RAM
- Capacitive touch sensors
- Super low-power
2 QuickStart
3 OpenOCD
Windows:
../../../nodetao/toolchain/openocd/bin/openocd.exe -f interface/stlink.cfg -f aet1-flash.conf
4 ARDUINO_EFM32
Build message:
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== Basic ==
* 刷入一个 Bootloader --- [https://github.com/im-tomu/toboot toboot]
* 使用 [https://github.com/arduino/dfu-utils-cross dfu-utils] 从 USB 口刷入固件程序...
* arduino core: https://github.com/todbot/ArduinoCore-EFM32
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=== Flashing the toboot ===
Brand-new EFM32HG will not have Toboot installed. Instead, they might have the SiLabs AN0042 bootloader.
The recommend way to load the bootloader onto a Chip is using a Raspberry Pi with OpenOCD. Instructions for doing this can be found in the [https://github.com/im-tomu/toboot/tree/master/openocd openocd] directory. You need OpenOCD version 0.10.0 or later to have EFM32HG support.
Tomu can be powered using the 3.3V pin, so you can create a sort of "programming wand" by bringing 3.3V, GND, SCK, and SIO out to a 0.1" header, running openocd in a loop, and touching the programming pins on the side of a Tomu board. The process only takes a few seconds, so contact doesn't have to be great.
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=== Install dfu-util ===
The dfu-util suite of programs is used to talk to Toboot
'''Ubuntu and Debian'''
sudo apt-get install dfu-util
Create /etc/udev/rules.d/10-tomu.rules and populate it with the following:
ATTRS{idProduct}=="70b1", ATTRS{idVendor}=="1209", MODE="777"
(Note: you can give it a more restrictive mode if you also give it a group that you’re in)
'''Windows'''
Download dfu-util-static.exe from the dfu-util repository and rename it to dfu-util.exe. Place it somewhere in your $PATH for convenience. To build examples, you’ll also want to get dfu-suffix.exe and put it in your $PATH.
'''Mac'''
Install Homebrew and run:
brew install dfu-util
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