PM-Board

Embedded development board with ATmega324P

This is a development board supporting the ATmega324P microcontroller. It is fully Arduino-compatible and it comes with the following features:

LSM9DS0 9-axis inertial sensor (accelerometer, gyroscope and magnetometer)
MPL3115 baro-altimeter sensor
Ambient temperature and light sensors
128x160 ST7735 color LCD display with SD card reader
RGB LED
16x02 character LCD display
GPIO LEDs and pushbuttons
JTAG and ISP connectors
USB programming and data interface

Repository Contents

/Hardware - Eagle design files (.brd, .sch)
/Images - Board images
/bin - Binaries (board bootloader)

Programming

avr-gcc & Makefile

Bootloader

The board comes pre-loaded with a bootloader. If you need to re-write it, connect an AVR-ISP or JTAG to the corresponding port and burn the bootloader .hex file with atmega324p as a target and the following fuse settings:

Fuse	Value
HIGH	0xDA
LOW	0xD7
EXT	0XFD

Writing a simple Hello World

Install avr-gcc on your machine. There are various tutorials on how to do this. Here are some examples, depending on your OS type:

Copy this code into your favourite code editor and save the file as "hello.c":

#include <avr/io.h>
#include <util/delay.h>
 
int main() {
	/* Setting PC0 as output */
	DDRC |= (1 << PC0);
 
	while(1) {
                /* Toggle pin state */
		PORTC ^= (1 << PC0);
 
                _delay_ms(500);
	}
 
	return 0;
}

To build and upload, you can use the following Makefile. Edit the port to correspond with your OS and serial port name:

# Linux
PORT ?= /dev/ttyUSB0
# Windows
# PORT ?= COM1
 
all: hello.hex
 
hello.hex: hello.elf
	avr-objcopy  -j .text -j .data -O ihex $^ $@
	avr-size hello.elf
 
hello.elf: hello.c
	avr-g++ -mmcu=atmega324p -DF_CPU=12000000 -Os -Wall -o $@ $^
 
upload: hello.hex
	avrdude -c urclock -P $(PORT) -b 57600 -p atmega324p -D -xnometadata -U flash:w:$<:a
 
clean:
	rm -rf hello.elf hello.hex

From your command line call > make all (generates hello.hex) and then > make upload.

Arduino

The board can be programmed using Mighty-Core.

Follow the "How to install" guide on their github page and use the following settings when burning the bootloader and uploading a sketch:

Board Pinout

LCD Displays

Character LCD	GPIO Pin	Arduino Pin	Graphical LCD	GPIO Pin	Arduino Pin
RS	PC0	16	CS	PB0	0
RW	PC1	17	RST	PB1	1
EN	PC2	18	A0	PB4	4
D4	PC3	19	SDA	PB5	5
D5	PC4	20	SCK	PB7	7
D6	PC5	21	Backlight	PA7	31
D7	PC6	22
Backlight	PC7	23

I2C Sensors & Bus Addresses

I2C	GPIO Pin	Arduino Pin	Chip	Address
I2C Enable	PA6	30	LSM9DS0	0x1D (XM) 0x6B (G)
SCL	PC0	16	MPL3115A2	0x60
SDA	PC1	17

SD Card

	GPIO Pin	Arduino Pin
CS	PA2	26
MOSI	PB5	5
MISO	PB6	6
SCK	PB7	7

RGB LED

	GPIO Pin	Arduino Pin
Red	PD5	13
Green	PD7	15
Blue	PB3	3

Miscellaneous

	GPIO Pin	Arduino Pin
Temperature Sensor	PA0	A0
Ambient Light Sensor	PA1	A1
Buttons (BTN1 - 6)	PA5	A5
BTN 1	PB2	2
BTN 2	PD6	14
Speaker	PD4	12

License Information

This product is open source!

Please review the LICENSE file for license information.

Distributed as-is; no warranty is given.

dantudose/PM-Board