本帖最后由 FSL_TICS_ZP 于 2014-10-8 16:32 编辑
文章地址：https://community.freescale.com/docs/DOC-100720
源代码地址：https://github.com/mbedmicro/CMSIS-DAP
OpenSDAv2: OpenSDAv2 uses the exact same hardware circuit as the original OpenSDA solution, and out of the box it still provides a debugger, drag-and-drop flash programmer, and virtual serial port over a single USB cable.
The difference is the firmware implementation: - OpenSDA: Programmed with the proprietary P&E Micro developed bootloader. P&E Micro is the default debug interface app.
- OpenSDAv2: Programmed with the open-sourced CMSIS-DAP/mbed bootloader. CMSIS-DAP is the default debug interface app.
| Firmware Developer | Kinetis K20 Based Hardware Circuit | Default Debug Interface | Drag-and-drop Target MCU Flash Programming | Virtual Serial Port | Source Code Available | OpenSDA | | | | | |
| OpenSDAv2 | | | | | | |
The bootloader and app firmware used by OpenSDAv2 is developed by the community at mbed.org, and is known as “CMSIS-DAP Interface Firmware”. If you explore that site, you will find that this firmware was also ported to run on other hardware, but the combination of this mbed.org firmware with the Kinetis K20 MCU is known as OpenSDAv2.
It is important to understand however that it is possible to run a P&E Micro debug app on the CMSIS-DAP/mbed bootloader found on OpenSDAv2. Likewise it is possible to run a CMSIS-DAP debug app on the P&E Micro bootloader found on OpenSDA. The debug application used needs to be targeted towards a specific bootloader though, as a single binary cannot be used on both the OpenSDA and OpenSDAv2 bootloaders.
OpenSDAv2.1: During development of OpenSDAv2 features and bug fixes, it was found that the reserved bootloader space was too small. Thus a new version of OpenSDAv2 had to be created, which was named OpenSDAv2.1. The difference between the OpenSDAv2.0 and v2.1 is the address where the debug application starts: for OpenSDAv2.0 it expects the application at address 0x5000, while OpenSDAv2.1 expects the application to start at address 0x8000.
The only board with OpenSDAv2.0 is the FRDM-K64F. All other OpenSDAv2 boards (such as the just released FRDM-K22F) use OpenSDAv2.1.
Unfortunately this means that new OpenSDAv2 apps are needed. From a user perspective this mostly affects the JLink app since it was shared across all boards. Make sure you download the correct app for your board based on the OpenSDAv2 version.
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发表于 2014-9-10 10:32:03
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