PSOC_compiler

Summary

Demos for writing and compiling bare metal programs for PSOC5 using open source tools.

Purpose

To demo ARM Cortex M3 low level development with specific reference to PSoC. To provide some open source support for the PSoC.

Requirements

• ARM GCC cross compiler
• A Cypress CY8CKIT-050 dev kit (to actually run programs)

See Also

• https://github.com/kiml/PSOC_programmer.git
• http://dfusion.com.au/wiki/ The ARM Embedded pages:
  • PSoC5 bare metal
  • PSoC5 programmer
  • GCC Linker

Additional Uses

• A simple general purpose embedded LCD printf library

License

• All code is released under GPL v3 except for any third party files which have their original license included.

Raison d'Etre

• Cypress put out a free but closed source MS Windows development environment. They do provide GCC but pretty much everything else is proprietary which is fine but:
  • I like the PSoC feature set (basically ARM CPU, mxied signal FPGA, decent analogue)
  • I wanted to learn more about internals of the ARM Cortex M3 chip used
  • I wanted to program the PSoC under Unix.

Short version - the mountain was there so I climbed it :-)

Getting Started

To use the programmer, edit conf/programmer.mak and change the UTILSPATH to point to the directory that contains bin/ and config/ of the programmer git repo.

Dirs

• demo1 - A basic demo to get started with bare metal. It's more about showing the compiler/linker options and interacting with the peer programmer tools than making a working program.

• demo2* - Hello World. This is a minimal working PSOC5LP program that flashes lights and outputs to the LCD demo2a - no config.hex, 'std' nm.hex, all config done in code. demo2b - Cypress compat config.hex, 'std' nm.hex, config done in mix code/data. Basically Cypress devkit model, but open source code. demo2c - My own app_data config format. Removes need for much custom register init config in code. 'std' nm.hex??. Config format is NOT Cypress compatible. demo2d - democ2c + cmsisv1.3

• demo3 - Compiling a Cypress devkit app (partial)