Seeed Xiao as DAPLink to burn bootloader the SAMD11 boards¶

Xiao to DAPLink¶

ref .How to use Arduino Boards as DAPLink Device

Install the DAPLink Arduino Libraries¶

Seeed_Arduino_DAPLink -> Code -> Download ZIP -> Seeed_Arduino_DAPLink-master .zip
Open the Arduino IDE, and click sketch -> Include Library -> Add .ZIP Library, and choose Downloads/Seeed_Arduino_DAPLink-master.zip

Install the Adafruit_TinyUSB_Arduino Library¶

Adafruit TinyUSB Library for Arduino -> Code -> Download ZIP -> Adafruit_TinyUSB_Arduino-master.zip

Note

If you have an error caused Adafruit_TinyUSB_Library when uploading sketch to Xiao, Use Adafruit_TinyUSB_Library Version 0.10.5 .

Open the Arduino IDE, and click sketch -> Include Library -> Add .ZIP Library, and choose Downloads/Adafruit_TinyUSB_Arduino-master.zip

Setup Xiao in Arduino¶

Preference -> Additional Boards Manager URLs https://files.seeedstudio.com/arduino/package_seeeduino_boards_index.json
Tool -> Boards -> Boards manager -> Search Xiao
Install Seeed SAMD Boards

Open the sketch¶

Unzip Seeed_Arduino_DAPLink-master.zip
Open Seeed_Arduino_DAPLink-master/examples/simple_daplink/simple_daplink.ino

Upload the sketch to Xiao¶

Upload the sketch to Xiao
- LEDs on Xiao one green -> two blue

Make Xiao to SWD adapter boards¶

Wiring¶

ref .How to use Arduino Boards as DAPLink Device

ref. class site

Eagle¶

Eagle .sch .brd

ref. Eagle holes making

SET FILL_LAYER 116 1;
run drill-aid 0

BOM¶

Item	Qty	Price	Link
Seeed Xiao	1	4.9USD, 556JPY	seeed, digikey, Amazon 3P
Pin Header(1x7)	2	some
Pin Socket(1x7)	2	some
wire from THT resistor	2	almost free

Boards¶

Install OpenOCD¶

Mac¶

ref. OpenOCD

1	`$ brew install openocd`

Download bootloader for SAMD11¶

SAMD11C14A Arduino-Compatible Bootloader -> Download -> zip
Unzip -> Download/atsamd11-master

Burn bootloader¶

Connection¶

PC(USB-C) - Xaio(SWD) - SAMD11_Board
3.3V will be supplied via SWD

Burn¶

$ cd Downloads/atsamd11-master/bootloader
$ ls
sam_ba_Generic_D11C14A_SAMD11C14A.bin
openocd.cfg
unprotect_bootloader.cfg

$ openocd
Open On-Chip Debugger 0.10.0
Licensed under GNU GPL v2
For bug reports, read
    http://openocd.org/doc/doxygen/bugs.html
Info : auto-selecting first available session transport "swd". To override use 'transport select <transport>'.
none separate
adapter speed: 400 kHz
cortex_m reset_config sysresetreq
Info : CMSIS-DAP: SWD  Supported
Info : CMSIS-DAP: JTAG Supported
Info : CMSIS-DAP: Interface Initialised (SWD)
Info : CMSIS-DAP: FW Version = 2.0.0
Info : SWCLK/TCK = 0 SWDIO/TMS = 1 TDI = 1 TDO = 0 nTRST = 0 nRESET = 1
Info : CMSIS-DAP: Interface ready
Info : clock speed 400 kHz
Info : SWD DPIDR 0x0bc11477
Info : at91samd11c14a.cpu: hardware has 4 breakpoints, 2 watchpoints
    TargetName         Type       Endian TapName            State       
--  ------------------ ---------- ------ ------------------ ------------
 0* at91samd11c14a.cpu cortex_m   little at91samd11c14a.cpu running
target halted due to debug-request, current mode: Thread
xPSR: 0x01000000 pc: 0x000004a0 msp: 0x20000ffc
target halted due to debug-request, current mode: Thread
xPSR: 0x01000000 pc: 0x000004a0 msp: 0x20000ffc
** Programming Started **
auto erase enabled
Info : SAMD MCU: SAMD11C14A (16KB Flash, 4KB RAM)
wrote 4096 bytes from file sam_ba_Generic_D11C14A_SAMD11C14A.bin in 1.113787s (3.591 KiB/s)
** Programming Finished **
** Verify Started **
verified 3904 bytes in 0.466176s (8.178 KiB/s)
** Verified OK **
shutdown command invoked

$ ls /dev | grep usb
cu.usbmodem14401
tty.usbmodem14401

Last update: November 22, 2021