Uploading binary data to a desired address

Purpose

Gecho has one megabyte of FLASH memory, and only a fragment is occupied by standard firmware.

You might need to use this process, if:

• you wish to extend the functionality
• you need to store larger amount of data
• it is not handy to pack data into source files (as constants etc.)
• you want to be able to replace this data without interfering with firmware

Connect your SWD Programming Adapter and start STM32 ST-LINK Utility.

Into the "Size" field, enter 0x100000 - this is a full range of FLASH memory available in our MCU - and click "Connect to the target" icon.

Implementing New Channel - A Rudimentary Drum Machine

Objective: Demonstrate how easy is it to expand the functionality using the framework, showing examples of how to:

• add a new channel with any numeric code we want
• enable or disable standard features that are available, to borrow some functionality from other channels
• upload arbitrary data into FLASH memory and access it, this is handy for lot of other things too
• decode binary 16-bit PCM sample data from a standard WAV format
• play multiple instruments in parallel, from FLASH memory with zero waiting state and no need for buffering in SRAM
• bind this new functionality to existing controls
• mix the signal output from our custom function into the loop with or without delay/echo

Requirements for any Gecho firmware programming