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by Roberthh
Sun Oct 10, 2021 7:04 am
Forum: General Discussion and Questions
Topic: Official build use less RAM memory then own build
Replies: 3
Views: 1264

Re: Official build use less RAM memory then own build

That was discussed in another thread as well. It is related to the ESP-IDF version you are using. With ESP-IDF V4.2 you get 110k, with V4.3 and v4.4 one ends up at ~65k. So if you are building for the "classic" EP32, use v4.2.
by Roberthh
Sat Oct 09, 2021 9:18 am
Forum: Other Boards
Topic: Teensy 4.0 & 4.1
Replies: 290
Views: 443063

Re: Teensy 4.0 & 4.1

To enter serial download mode the pin GPIO_AD_B0_05 has to be set high, all other mode switches low. I just tried that on the ARC MiX board using Debian Linux. Something that puzzled me when looking at the schematics is, that GPIO_AD_B0_05 is connected to the 3/6 position of the DIP switch, not the...
by Roberthh
Sat Oct 09, 2021 7:02 am
Forum: Other Boards
Topic: Teensy 4.0 & 4.1
Replies: 290
Views: 443063

Re: Teensy 4.0 & 4.1

I just checked whether the serial load method is suitable for Teensy 4.x. It is not. GPIO_AD_B0_05 is tied to GND.
by Roberthh
Fri Oct 08, 2021 1:35 pm
Forum: Other Boards
Topic: Teensy 4.0 & 4.1
Replies: 290
Views: 443063

Re: Teensy 4.0 & 4.1

@loboris This is definitely a great help for all people without and with JLink hardware for flashing firmware. Thank you for your effort. This is required, even with the DFU-Bootloader we are developing at the moment. This initial bootloader cannot be installed by DFU and has to be installed by othe...
by Roberthh
Fri Oct 08, 2021 11:35 am
Forum: ESP32 boards
Topic: bytearray() hex convert handling for i2c.writeto()
Replies: 4
Views: 1527

Re: bytearray() hex convert handling for i2c.writeto()

b'9\x0f,X' and b'\x39\x0f\x2c\x58' represents the same data. The way Python prints bytes object, every printable byte is shows as the ASCII character, so \x39 is shown as character 9, \x2c is shown as comma, \x58 is shown as character X.
by Roberthh
Thu Oct 07, 2021 2:56 pm
Forum: Other Boards
Topic: Teensy 4.0 & 4.1
Replies: 290
Views: 443063

Re: Teensy 4.0 & 4.1

I have added board files for the ARCH MIX board to https://github.com/robert-hh/micropytho ... t_combined.
Documentation on how devices are assigned to Pins can be found in https://github.com/robert-hh/micropytho ... imxrt_docs.
Edit: Updated - I2C assignment changed.
by Roberthh
Thu Oct 07, 2021 1:06 pm
Forum: Other Boards
Topic: Teensy 4.0 & 4.1
Replies: 290
Views: 443063

Re: Teensy 4.0 & 4.1

The Teensy 4.1 bootloader starts on that device. Only the target cannot be built yet since the matching firmware loader spec file is missing.
Edit: Solved
by Roberthh
Thu Oct 07, 2021 12:36 pm
Forum: Other Boards
Topic: Teensy 4.0 & 4.1
Replies: 290
Views: 443063

Re: Teensy 4.0 & 4.1

JFlashExe complained about a missing license, JFlashLiteExe worked. So it's time to get our bootloader ready.
by Roberthh
Thu Oct 07, 2021 11:58 am
Forum: Other Boards
Topic: Teensy 4.0 & 4.1
Replies: 290
Views: 443063

Re: Teensy 4.0 & 4.1

@loboris I just received the ARCH Mix board. Just a quick question: How did you load firmware to the board. My usual approach using the Ozone Debugger failed. I can connect to the board, read flash, single step. But no write.