SerialUploader
Uploads files via serial port. Originally developed for file upload to the Spencer flash chip.
Device should be running a corresponding upload program. An example is the FlashTools::upload() function located in src/Util/FlashTools.cpp of the Spencer repository.
Usage
./SerialUploader <directory> <port>Where <direcory> is the directory containing files to be uploaded, and <port> is the device serial port. The directory structure is going to be flattened, with directory names being added as the filename prefix. For example, the file foo/bar/example.bin will be uploaded as foo-bar-example.bin.
Building
CMake, GNU Make, and gcc (g++) are required for compiling. On Windows, MinGW64-w64 can be used. Run cmake . in the root directory to generate build scripts, followed by make to build the program.
On Windows, run CMake as cmake . -G "MinGW Makefiles" to generate build scripts using the MinGW compiler.
Protocol
The device is waiting for a 6 character string upload, after which it sends a 5 character string erase, beginning the flash chip erase operation, after which it sends a 5 character string ready.
After receiving the ready string, the uploader starts sending files. For each file, first the filename is sent as a 255 character ASCII encoded string, where the last (25th, count starting at 1) character is the null-terminator. The following 4 bytes sent are the file size as an unsigned 32 bit integer.
Following the file metadata, the whole file is read from disk and sent as a raw byte stream, in chunks of 256 bytes.
After each file, the uploader expects to receive a 32 bit unsigned integer file checksum, calculated by summing each byte of the file as an unsigned integer. If the received checksum doesn't match the file, that file is re-sent.
After all files in the directory are uploaded, a 4 character string end\0 is sent, indicating the end of the upload operation.