Version 1.31

dap42 firmware release 1.31

This is an incremental release to update to the latest version of libopencm3 and to formalize the DAP42DC hardware target.

Changelog

DAP42DC hardware target

• Derek's standalone DAP42 debugger design now has its own dedicated target: DAP42DC.
• The pinout is similar to the BRAINV3.3 target except without CAN support.

libopencm3 updates

• The libopencm3 submodule has been updated to 239b4a4 (2018-10-03).
• Linker scripts now reference cortex-m-generic.ld instead of libopencm3_stm32f0.ld/libopencm3_stm32f1.ld
• It is no longer necessary for the Cortex-M0 target configurations to provide default USART preprocessor defines for compatibility
• USB control callbacks now use the usbd_request_return_codes enum type instead of int
• The CAN driver no longer passes in the CAN peripheral to can_filter_id_mask_32bit_init. I'm pretty sure that parameter is going to come back in a future version of libopencm3 though.

Continuous Integration updates

• The CircleCI 1.0 configuration has been updated to the new CircleCI 2.0 format
• The build toolchain has been updated from gcc-arm-none-eabi-5.2-2015q4 to gcc-arm-none-eabi-6.2-2016q4.
• The toolchain install utility script now detects and complains if the toolchain is not executable due to 32-bit/64-bit compatibility issues.

Prebuilt binaries

Binaries for F042 targets

• DAP42.bin is the firmware for native dap42 hardware.
• DAP42DC.bin is the firmware for ISC's standalone DAP42 debugger hardware.
• BRAINv3.3.bin is the firmware for dap42 hardware embedded into CalSol's custom LPC1549 development board.

Binaries to flash onto STLink/v2 clones via SWD

• DAP103-dapboot-combined-stlink.bin contains the debugger firmware bundled with the dapboot DFU bootloader.
• DAP103-stlink.bin is just the debugger firmware, with no firmware upgrade capabilities.

Binaries to upgrade reprogrammed STLink/v2 clones via DFU

• DAP103-DFU-stlink.bin is just the updated debugger firmware.

Sources

Full source code for the dap42 project can be found online:

• dap42: https://github.com/devanlai/dap42
• dapboot: https://github.com/devanlai/dapboot
• libopencm3: https://github.com/libopencm3/libopencm3

Version 1.30

dap42 firmware release 1.30

This release includes CDC-ACM performance enhancements, CAN->USB support, and a bootloader update.

Changelog

CDC-ACM enhancements

• The serial port now uses a DMA-driven circular buffer for receiving data on the hardware UART.
  • On F042 based targets, the receive buffer has been bumped from 128B to 1024B
  • On F103 based targets, the receive buffer has been bumped from 1024B to 4096B
• The serial port has been stress-tested up to 2 MBaud on F042 targets and 2.25 MBaud on F103 targets.
• The CDC-ACM driver now uses the USB SOF event for framing transfers instead of a timeout.

CAN->USB support

• CAN-capable targets now expose a second CDC-ACM interface that encodes CAN frames using the slcan/Lawicel CANUSB protocol.
• The slcan interface has been tested with USBtinviewer, the socketcan slcand daemon, and the UAVCAN GUI Tool.
• Only F042-based targets can collect CAN frames while connected over USB.
• Currently, the only official target with CAN enabled is the BRAINV3.3
  • To share CAN frames with the debugger, connect the CAN transceiver's RX pin to pin P0_15.
  • The debugger can only receive frames in listen-only/silent mode - it cannot transmit or ACK frames.
  • The BOOT0 pin must be disabled to use CAN - see FLASHING.md for details.

Bootloader update

• The bundled dapboot DFU bootloader for DAP103 STLink targets has been updated from version 1.0 to version 1.10.
  • Version 1.10 re-enables DFU upload (reading out the existing firmware) and prevents writing past the end of flash.
• To update the bootloader and the debugger firmware at the same time, you can flash the DAP103-dapboot-combined-stlink-updater.bin updater over DFU, which will upgrade the bootloader and install DAP103 version 1.30.

Prebuilt binaries

Binaries for F042 targets

• DAP42.bin is the firmware for native dap42 hardware.
• BRAINv3.3.bin is the firmware for dap42 hardware embedded into CalSol's custom LPC1549 development board.

Binaries to flash onto STLink/v2 clones via SWD

• DAP103-dapboot-combined-stlink.bin contains the debugger firmware bundled with the dapboot DFU bootloader.
• DAP103-stlink.bin is just the debugger firmware, with no firmware upgrade capabilities.

Binaries to upgrade reprogrammed STLink/v2 clones via DFU

• DAP103-DFU-stlink.bin is just the updated debugger firmware.
• DAP103-dapboot-combined-stlink-updater.bin is a bootloader updater that overwrites the bootloader and itself with the contents of DAP103-dapboot-combined-stlink.bin after loading it over DFU.

Sources

Full source code for the dap42 project can be found online:

• dap42: https://github.com/devanlai/dap42
• dapboot: https://github.com/devanlai/dapboot
• bootup: https://github.com/devanlai/bootup
• libopencm3: https://github.com/libopencm3/libopencm3

Version 1.20

dap42 firmware release 1.20

This release includes general CDC-ACM UART improvements and BRAINv3.3 support.

Changelog

• On the new BRAINv3.3 target, the embedded debugger can use the target's reset button as a replacement for the BOOT0 pin to enter the DFU bootloader on power up.
• The CDC-ACM RX buffer is now cleared whenever a new serial connection is opened for better compatibility with baudrates besides 115200.
• The CDC-ACM RX endpoint now consumes less USB bandwidth by only sending a packet when the packet buffer is full or after 1ms since the last packet was sent, whichever comes first.
• The CDC-ACM TX endpoint now sends NAKs as needed to prevent the USB host from overflowing the TX buffer.

Prebuilt binaries

• DAP42.bin is the firmware for native dap42 hardware.
• DAP103-dapboot-combined-stlink.bin is firmware for STLink/v2 clone hardware, bundled with the dapboot DFU bootloader.
• DAP103-stlink.bin is also for STLink/v2 clone hardware, but with no bootloader.
• DAP103-DFU-stlink.bin can be used to upgrade an STLink/v2 over DFU if it has a DFU bootloader installed.
• BRAINv3.3.bin is the firmware for dap42 hardware embedded into CalSol's custom LPC1549 development board.

Sources

Full source code for the dap42 project can be found online:

• dap42: https://github.com/devanlai/dap42
• dapboot: https://github.com/devanlai/dapboot
• libopencm3: https://github.com/libopencm3/libopencm3

Version 1.10

Initial dap42 v1.10 firmware release for native dap42 hardware and STLink/v2 clone hardware.

DAP42.bin is the firmware for native dap42 hardware.
DAP103-dapboot-combined-stlink.bin is firmware for STLink/v2 clone hardware, bundled with the dapboot DFU bootloader.
DAP103-stlink.bin is also for STLink/v2 clone hardware, but with no bootloader.
DAP103-DFU-stlink.bin can be used to upgrade an STLink/v2 over DFU if it has a DFU bootloader installed.