Instructor Info

Daniel Kohn
Email: dekohn@memphis.edu
Office ET218
Office Hours

Course Info

Assignment Submission

Required Text

The AVR Microcontroller and Embedded Systems Using Assembly and C: Using Arduino Uno and Atmel Studio by Sarmad Naimi and Muhammad Ali Mazidi 2nd Ed

Author's Website http://nicerland.com/

Previous Courses

TECH 3233 - Microprocessors
TECH 3812 - Digital Communications

Required Software

MicroChip Studio (Formerly Atmel Studio 7) - note: "Download Microchip Stuido button does not seem to work, scroll down to "Downloads and Documents"
Arduino IDE (Install Legacy IDE 1.8.x for avrdude utility)
Putty

Course Outline:

Date	Topic	Reading	Handouts	Assignments
Aug 27	Welcome Sync Serial	Review Interrupts for Next Class Chp 10.3 and Lab 6 Review Synchronous Serial for next class PS2 Synchronous Serial Keyboard	Lecture Review Chp 10	Lab #0 - Due tonight. Install MicroChip Studio. Open a project, replace main.c with THIS CODE and upload it to the board. Demo to instructor. This verifies the new install of the software, the drivers can be installed on the new image, and you remember how to set up and upload code to the Arduino. Lab #1 - Write a program to read a magnetic card (credit card). The data sheet for the card reader is available HERE. Info on the data format is available HERE. Most credit cards use ANSI/ISO BCD Data Format. CLICK HERE for a sample waveform. For Procedure step 5, you must include ata bits read from the card are correct by interpreting them by hand and turing the hand interpretation with the assignment. You can get extra credit if you translate the card data into the card number and display it on the terminal.
Aug 29	Work on Lab #1
Sep 3	\|
Sep 5	SPI	What could go wrong: SPI (Hackaday) SPI Explained (Note code for different uProc)	Lecture Notes	Lab #2 MAX7219 Datasheet
Sep 10	Work on Lab #2
Sep 12	\|
Sep 17	No Class / Lab (Family Emergency)			Try to finish Lab #2
Sep 19	No Class (Family Emergency)			\|
Sep 24	I2C	Chp 18 What Could Go Wrong? I2C Edition (Hackaday)	Lecture Notes	Lab #3a - get program 18-13 working for RTC. We will replace the uart routines in the sample code and use printf instead. Link is broken in doc for Escape Sequences, use THIS LINK instead (just remember that <ESC> is \E in printf statements).
Sep 26	\|			Lab #3b
Oct 1	\|
Oct 3	\|
Oct 8	WiFi Using ESP8266		AT Commands AT Commands	Lab #4 We will use Software Serial Template add to start this project. Download, unzip and open to start YOUR code. For the GET /save_get.php... there is a SPACE between "GET" and "/save"! It will error if this space is missing! Also note that strings need to end with \r\n. If you use \n\r it will error.
Oct 10	No Class (Instructor out of town)
Oct 15	No Class (Fall Break)
Oct 17	No Class (Instructor out of town)
Oct 22	Finish Lab #4
Oct 24	Using Wifi in AP Mode / Web Server		ESP8266 AP Mode AP with DHCP	Lab #5
Oct 29	\|
Oct 31	\|
Nov 5	\|
Nov 7	\|
Nov 12	Discuss Final Project			Final Lab Project Due Dec 3, 2024 by end of lab (with demo) Although the project was written up after the fact, here is the New Lab Handout for reference.
Nov 14	Work on Project
Nov 19	\|
Nov 21	\|
Nov 26	No class (Family Emergency)
Nov 28	No Class (Thanksgiving)
Dec 3	Finish Project			Project Due by end of lab (with demo)
Dec 5	Study Day

Rigol Digital Oscilloscope - 2000 Series
• (note: to use USB Stick, it MUST be formatted as FAT32)

Arduino Ethernet Shield 2
WIZ5500 IC
Real Time Clock (BOB 12708)
16x2 SerLCD
ADXL345 Tripple Axis Accelerometer
Transceiver (nRF24L01+)
Wifi Module (ESP8266)
Bi-Directional Logic Level Converter

Info needed for Labs

Determine Com Port

With Arduino plugged in to computer's USB port
Win 10 - Search for "Powershell" and open
Type - "Get-WMIObject Win32_SerialPort" (no quotes)
check results for Arduino Uno (Com __ )

Atmel Studio

Setup Strings:

C:\Program Files (x86)\Arduino\hardware\tools\avr\bin\avrdude.exe

-C "C:\Program Files (x86)\Arduino\hardware\tools\avr\etc\avrdude.conf" -p atmega328p -c arduino -P COM7 -b 115200 -U flash:w:"$(ProjectDir)Debug\$(TargetName).hex":i"

Atmel Studio add ins:

Microchip Gallery

Go to above link then search for "Microchip Gallery". Click on "Download" on left side of screen and run the downloaded file (if Atmel Studio was opened when you did this, close and reopen Atmel Studio). This should now allow Atmel Studio access to plugins (TOOLS | Extensions and Updates). It is suggested in go ahead and install "Terminal for Atmel Studio"

To get printf to work with floating point values:

Project | nameofproject Properties | Toolchain : AVR/GNU Linker | General | Check "Use vprintf library(-Wl,-u,vfprintf)"
Project | nameofproject Properties | Toolchain : AVR/GNU Linker | Miscellaneous | Other Linker Flags put into textbox | "-lprintf_flt" (leave off quotes).

For ATmega 2560

ATmega2560 Datasheet

2nd setup string:

-C "C:\Program Files (x86)\Arduino\hardware\tools\avr\etc\avrdude.conf" -p atmega2560 -c wiring -P COM3 -b 115200 -U flash:w:"$(ProjectDir)Debug\$(TargetName).hex":i"

if you get an error that says:

avrdude.exe: Device signature = 0x1e9801 (probably m2560)
avrdude.exe: NOTE: "flash" memory has been specified, an erase cycle will be performed
To disable this feature, specify the -D option.
avrdude.exe: erasing chip
avrdude.exe: stk500v2_command(): command failed

you need to add a -D to the 2nd setup string like this:

-C "C:\Program Files (x86)\Arduino\hardware\tools\avr\etc\avrdude.conf" -p atmega2560 -c wiring -P COM3 -b 115200 -U flash:w:"$(ProjectDir)Debug\$(TargetName).hex":i"

Using Multiple Usarts:

When you start the project, pick the number of USARTS you need. In Each USART, change the mode to Async IRQ Mode and make sure you enable Printf support. You can adjust the RX and TX Buffer size to meet your needs.

at the start of you code (above atmel_start_init();) you will need to add the following line:

FILE USART_x_stream = FDEV_SETUP_STREAM(USART_x_write, USART_x_read, _FDEV_SETUP_RW);

where x is the USART number (you will need to add this line for EACH USART you wish to use 0-3).

to get characters:

fgetc(&USART_x_stream);

to print stuff, put it in an array (buffer in the example below) with sprintf then send to usart with fprintf:

sprintf(buffer,"Hello World\n\r");
fprintf(&USART_x_stream,"%s",buffer);