Unofficial C library implementation for 4D Systems Serial Environment for Picaso based modules.

For official implementations look for 4D Systems github page.

This library contains only function parts that will turn parameters to correct byte sequences using provided macros for sending and receiving bytes over serial line. Thus this library should be usable in multiple environments and actual libraries.

This implementation also allows to namespace these library functions as user likes to or to use different serial implementations or interfaces. Though, for now asyncronous use is not tested or thought about, but syncronous should work in multiple instances.

NOTE: Only some functions are implemented so far. Feel free to create PR to fill in.

Copy or use git submodule to get this library into e.g. subfolder "lib" of your project/library. Create 2 files based on 4d_pse2_example.h and 4d_pse2_example.c in your project and make sure the include directives work correctly. You can use relative paths or add this library to gcc search path.

The idea is that you will compile the file you created instead of anything from this library directly. This is so we can compile against any functions you define for the write and read methods.

Check next section and the example files to find out how to use the library.

L4D_PSE2_PUTCHAR required: Define this to be the function name (or callable macro) of function that writes byte to the serial interface. This function/macro doesn't return anything and takes single byte as an argument.

L4D_PSE2_GETCHAR required: Define this to be the function name (or callable macro) of function that reads byte from the serial interface. This function/macro doesn't take argument, but returns 16 bit int (int16_t) and takes no arguments. Negative value means error. Positive is presumed to be single byte (uint8_t).

L4D_PSE2_PUTWORD: You can have more optimal defition to writing word than calling L4D_PSE2_PUTCHAR twice (which is done if this is not defined).

L4D_PSE2_GETWORD: Similar to above. Word implementation of L4D_PSE2_GETCHAR. FIXME: this should be able to return error.

L4D_PSE2_PREFIX: Prefix for all of the types and functions defined in this library. Default prefix is l4d_pse2_. If you define this to be empty, no prefix is added.