Sysconfig is utilized to select and name the needed GPIO pins and timer resource needed by the software LCD solution. The provided Sysconfig file already has the appropriate naming provided for a working solution. Add, remove, or modify the provided pin-out to suit your application needs, while observing the recommendations provided in the Section 2 section. Sysconfig is also where you can change timer clock settings, and thus the LCD refresh rate. If you need to hit a specific refresh rate, keep in mind that the LCD_Update_Clock described in Section 3.2, needs eight update cycles to refresh the entire LCD screen. This means you will need to be servicing the timer interrupt at eight times the refresh rate. For example, if one wanted an LCD refresh rate of 30Hz, then the timer must be setup to interrupt the device at a rate of 240Hz to meet that refresh rate.

Table 3-1 showcases the code definitions and maps that need to be modified to fit your solution. This includes customizing to your chosen pins and the characters to LCD mapping as discussed in Section 1.2. These definitions are found at the beginning of the principle .c file for each project.