| # Hello World Example | |
| ## Overview | |
| `Hello_world` is the demo program used to show case basic functionality of the system. | |
| The test itself does 2 main things: | |
| * Echo pin changes over UART. | |
| * Echo SPI input over UART. | |
| ## GPIO Changes Over UART | |
| This function primarily exercises the GPIO and UART blocks. | |
| The test monitors changing values on the GPIO line and reports them over UART. | |
| ## SPI Echo Over UART | |
| All data input over SPI is echo'd on UART in a word aligned fashion. |