Exercises are optional, though I strongly recommend you to experiment with the source code a little bit. If you were able to complete any of the exercises - please share your source code with others. For details see the contribution guide.
- Introduce a constant
baud_rate, calculate necessary Mini UART register values using this constant. Make sure that the program can work using baud rates other than 115200. - Change the OS code to use UART device instead of Mini UART. Use
BCM2837 ARM Peripheralsmanual to figure out how to access UART registers and how to configure GPIO pins. - Try to use all 4 processor cores. The OS should print
Hello, from processor <processor index>for all of the cores. Don't forget to set up a separate stack for each core and make sure that Mini UART is initialized only once. You can use a combination of global variables anddelayfunction for synchronization. - Adapt lesson 01 to run on qemu. Check this issue for reference.