From 7e5efe1fc2c650f5c2cc5b2d771aa6af6f8e3a16 Mon Sep 17 00:00:00 2001 From: Erik Strand <erik@erikstrand.net> Date: Tue, 3 Dec 2019 14:20:28 -0500 Subject: [PATCH] Link to Adafruit bootloader releases --- README.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.md b/README.md index c0073a8..57e8415 100644 --- a/README.md +++ b/README.md @@ -21,7 +21,7 @@ Since [Adafruit](https://learn.adafruit.com/adafruit-feather-m4-express-atsamd51 **fair warning** >Use of the arduino bootloader *does* assume that your circuit has a USB port available, as well as a 32.678kHz clock on the RTC Xout / Xin pins. During cycles, the bootloader (assuming it is on a Feather M4) will toggle 'D13' (PA23) as well as send Neopixel Data to (?). -To get started, find the latest build of the [adafruit bootloader] and download that (probably a `.bin` or `.elf` or `.hex` file). +To get started, find the latest build of the [adafruit bootloader](https://github.com/adafruit/uf2-samdx1/releases) and download that (probably a `.bin` or `.elf` or `.hex` file). The Adafruit Feather M4 uses the SAMD51J19A, so grab that one for the current generation squidworks module. We need to write this file into the micro's memory. I have been using the `Serial Wire Debug` interface, which is enabled by default on the D51 hardware (but JTAG is also available, but requires an enable pin pulled low somewhere *I think*). `SWCLK is on PA30` and `SWDIO is on PA31`. -- GitLab