84 lines
3.4 KiB
Plaintext
84 lines
3.4 KiB
Plaintext
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README
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======
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This README discusses issues unique to NuttX configurations for the Spark Core board from Spark Devices (http://www.sparkdevices.com). This board features the STM32103CBT6 MCU from STMicro.
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Contents
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========
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- Development Environment
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- DFU
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Development Environment
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=======================
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Either Linux (recommended), Mac or Cygwin on Windows can be used for the development environment.
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The source has been built only using the GNU toolchain (see below). Other
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toolchains will likely cause problems. Testing was performed using the Cygwin
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environment because the Raisonance R-Link emulatator and some RIDE7 development tools
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were used and those tools works only under Windows.
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DFU
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===
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The linker files in these projects can be configured to indicate that you
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will be loading code using STMicro built-in USB Device Firmware Upgrade (DFU)
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loader or via some JTAG emulator. You can specify the DFU bootloader by
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adding the following line:
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CONFIG_STM32_DFU=y
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to your .config file. Most of the configurations in this directory are set
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up to use the DFU loader.
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If CONFIG_STM32_DFU is defined, the code will not be positioned at the beginning
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of FLASH (0x08000000) but will be offset to 0x08005000. This offset is needed
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to make space for the DFU loader and 0x08005000 is where the DFU loader expects
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to find new applications at boot time. If you need to change that origin for some
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other bootloader, you will need to edit the file(s) ld.script.dfu for each
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configuration.
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For Linux or Mac:
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----------------
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While on Linux or Mac, we can use dfu-util to upload nuttx binary.
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1. Make sure we have installed dfu-util. (From yum, apt-get or build from source.)
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2. Start the DFU loader (bootloader) on the Spark board. You do this by
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resetting the board while holding the "Key" button. Windows should
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recognize that the DFU loader has been installed.
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3. Flash the nuttx.bin to the board use dfu-util. Here's an example:
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$ dfu-util -a1 -d 1eaf:0003 -D nuttx.bin -R
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For anything not clear, we can refer to LeafLabs official document:
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http://leaflabs.com/docs/unix-toolchain.html
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For Windows:
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-----------
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The DFU SE PC-based software is available from the STMicro website,
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http://www.st.com. General usage instructions:
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1. Connect the Spark board to your computer using a USB
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cable.
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2. Start the DFU loader on the Spark board. You do this by
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resetting the board while holding the "Key" button. Windows should
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recognize that the DFU loader has been installed.
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3. Run the DFU SE program to load nuttx.bin into FLASH.
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What if the DFU loader is not in FLASH? The loader code is available
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inside of the Demo dirctory of the USBLib ZIP file that can be downloaded
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from the STMicro Website. You can build it using RIDE (or other toolchains);
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you will need a JTAG emulator to burn it into FLASH the first time.
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In order to use STMicro's built-in DFU loader, you will have to get
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the NuttX binary into a special format with a .dfu extension. The
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DFU SE PC_based software installation includes a file "DFU File Manager"
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conversion program that a file in Intel Hex format to the special DFU
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format. When you successfully build NuttX, you will find a file called
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nutt.hex in the top-level directory. That is the file that you should
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provide to the DFU File Manager. You will end up with a file called
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nuttx.dfu that you can use with the STMicro DFU SE program.
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