Chapter 11: Serial Interfacing
Embedded
Systems - Shape
The World
Jonathan
Valvano
and Ramesh Yerraballi
As part of the edX online class, we made some interactive web pages to illustrate fundamental concepts
| 2. Fundamental Concepts | Number conversions |
| 5. Introduction to C | Flowcharts, C vs assembly |
| 6. Microcontroller Ports | Input/output, direction register |
| 7. Design and Development | Successive refinement, if-then, loops |
| 10. Finite State Machines | Vending machine and stepper motor |
| 11. UART Serial Interface | Blind, busy-wait, interrupt, serial port |
| 12. Interrupts | Mail box, context switch |
| 13. DAC and Sound | Sampling rate, precision, how a DAC works |
| 14. ADC and Data Acquisition | How an ADC works, Nyquist Theorem |
Use the following tool to see how blind-cycle synchronization works. You will need to enter a number between 1-10 to simulate the timing behavior of the device.
Use the following tool to see how busy-wait synchronization works. You will press the "Ready" button to simulate the device being ready
Use the following tool to see how interrupt-based synchronization works. The foreground thread and background thread (the Interrupt Service Routine or ISR) communicate using a buffer called a first in first out queue (FIFO)
Use the following tool to watch the steps involved in Serial Communication of a simple two-byte message. Click Start/next over and over to single step the process, and click Run to run the entire sequence.
Click Start to Send 'H' to the direction register
Reprinted with approval from Embedded Systems: Introduction to ARM Cortex-M Microcontrollers, 2013, ISBN: 978-1477508992, http://users.ece.utexas.edu/~valvano/arm/outline1.htm
and from Embedded Systems: Real-Time Interfacing to Arm® Cortex™-M Microcontrollers, 2016, ISBN: 978-1463590154, http://users.ece.utexas.edu/~valvano/arm/outline.htm