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arduino / ArduinoCore-samd

Arduino Core for SAMD21 CPU
GNU Lesser General Public License v2.1
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UART Bootloader #236

Open fabltd opened 7 years ago

fabltd commented 7 years ago

Have implemented the Bootloader and works over USB. Trying to load via Sercom 0. Atmel docs say send # and should get a response. This doesn't seem to work.

What baud rate should be used is there something missing?

fabltd commented 7 years ago

Tested UART connection (Serial1) PA10&PA11 in a sketch and TX&RX work.- Sercom0

Have tried two target boards. With boot-loader uploaded.

Neither will respond to # send over Uart while bootloader is running. (LED pulsing)

facchinm commented 7 years ago

The bootloader listens on Serial1 if compiled correctly (see https://github.com/arduino/ArduinoCore-samd/blob/master/bootloaders/zero/main.c#L171 for the needed defines). The protocol implemented is the same as BOSSA over USB (you can use the same bossac binary and specifying -U false).

facchinm commented 7 years ago

Ah, and the baudrate should be 115200. Make sure you are using the latest version of the bootloader because otherwise you'll incur in a bug which caused the port speed to be set incorrectly.

fabltd commented 7 years ago

I am using:

https://github.com/arduino/ArduinoCore-samd/blob/master/bootloaders/zero/board_definitions_genuino_zero.h

This sets the boot-loader as using SERCOM0?

fabltd commented 7 years ago

using latest git version.

sam_ba_monitor.h declares:

define SAM_BA_INTERFACE SAM_BA_BOTH_INTERFACES

So uart should be enabled ?

On 16 May 2017 at 14:27, Martino Facchin notifications@github.com wrote:

Ah, and the baudrate should be 115200. Make sure you are using the latest version of the bootloader because otherwise you'll incur in a bug which caused the port speed to be set incorrectly.

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facchinm commented 7 years ago

Yes. it should be working out of the box on Serial1 (pins 0/1 on Zero board). Did you check with a scope if you can get any response when launching bossac on that port (with an USB-to-serial of course)?

fabltd commented 7 years ago

Hi

I have USB to serial and have simply tried to send # and see if there is a response. I think this is what bossac does.

I get nothing I have tried everything. I think something is wrong can you test?

facchinm commented 7 years ago

I just tested with:

Send the board to bootloader mode by clicking the reset button; the onboard LED will start fading. Then you can flash with

.../packages/arduino/tools/bossac/1.7.0/bossac -i -d --port=ttyUSB0 -U true -i -e -w -v /tmp/arduino_build_128082/Blink.ino.bin -R

It worked at the first try with the default images / IDE tools. Could you perform the same test to make sure your setup is ok?

fabltd commented 7 years ago

Will test later today.

Is the interactive mode not supported?