SHPI.one Basic ATmega32u4 Firmware

Basic firmware for ATmega32u4 as I2C-Slave

• communication only over I2C (USB free for CULFW)
• backlight control
• LCD setup
• control relays
• control internal blower fan
• control LED
• read sensors and more
• uses counter0 for VENT PWM

prerequisites

A SHPI.one with GCC and DFU-programmer installed.

sudo apt-get install dfu-programmer gcc-avr binutils-avr avr-libc

Getting Started

Download GIT folder on your SHPI.one:

git clone https://github.com/shpi/one_firmware_std.git

I2C example commands

For running command on console, u need to disable CRC check.

Disable CRC check

i2cset -y 2 0x2A 0xFE 0x00             

Read relay 1 status

i2cget -y 2 0x2A 0x0D             

it should return :

0x00   // or 0xFF, depending relay 1 status 

If response consists more bytes, use

i2cget -y 2 0x2A    

to read one more byte.

Compile & flash

To compile and flash:

cd one_firmware_std
sudo make flash

Please restart after flashing, to avoid touchscreen issues.

I2C commands

Function	Read addr	Write addr	Bytes	Interpretation	Range
Range	0x01-0x7F	0x80-0xFF
A0 (GD0 CC1101)	0x00		2	10bit in 2 Byte, LOW→HIGH	0 -1023
A1 (MICS CO)	0x01		2	10bit in 2 Byte, LOW→HIGH	0 -1023
A2 (MICS No2)	0x02		2	10bit in 2 Byte, LOW→HIGH	0 -1023
A3 (MICS NH3	0x03		2	10bit in 2 Byte, LOW→HIGH	0 -1023
A4 (MP503)	0x04		2	10bit in 2 Byte, LOW→HIGH	0 -1023
A5 (NTC 10K)	0x05		2	10bit in 2 Byte, LOW→HIGH	0 -1023
A7 (ACS712)	0x06		2	10bit in 2 Byte, LOW→HIGH	0 -1023
BACKLIGHT_LEVEL	0x07	0x87	1	1 Byte	0-31
VENT_RPM	0x08		2	2 Byte	UPM
VCC ATmega	0x09		2	2 Byte	in Millivolts
Internal Temp ATmega	0x0A		2	2 Byte	degree celsius
FREERAM ATmega	0x0B		2	2 Byte	in Bytes
LED_COLOR	0x0C	0x8C	3	3 Byte	R, G, B → 0-254,0-254,0-254
Relay1	0x0D	0x8D	1	1 Byte	0x00=off, 0xFF=on
Relay2	0x0E	0x8E	1	1 Byte	0x00=off, 0xFF=on
Relay3	0x0F	0x8F	1	1 Byte	0x00=off, 0xFF=on
D13 (reset RPI)	0x10	0x90	1	1 Byte	0x00=off, 0x01=1sec low for reset*, 0xFF=on
HWB (5Vheat gasheater)	0x11	0x91	1	1 Byte	0x00=off, 0xFF=on
Buzzer	0x12	0x92	1	1 Byte	0x00=off, 0xFF=on, more will follow
VENT_PWM	0x13	0x93	1	1 Byte	0=max speed, ..., 253=minimum,254=autominimum, 255=off
LED_COLOR_R	0x14	0x94 set R color	1	1 Byte	0 – 255
LED_COLOR_G	0x15	0x95 set G color	1	1 Byte	0 – 255
LED_COLOR_B	0x16	0x96 set B color	1	1 Byte	0 – 255
A7_AVG (AC curr)	0x17 (prev.:0x14)		2	2 Byte	0 – 1023
DISPLAY CONTROLLER	0x18	0x98	1	1 Byte	0x00=off, 0xFF=on
ALL PIXEL ON / OFF	0x19	0x99	1	1 Byte	0x00=off, 0x01=normal , 0xFF=on
WATCHDOG	0x20	0xA0	1	1 Byte	0x00=off, 0x01=only LED, 0xF1=hard reset, 0xFF= hard reset, with fallback
RGB led control position	0x21	0xA1	1	1 Byte	0x00=LOGO, 0x01=signal LED
DFU BOOT		0xFD	1	1 Command	0xFF=DFU active
CRC CHECK	0x7e	0xFE	1	1 Byte	0x00=off, 0xFF=on
FW_VERSION	0x7F		1	1 Byte	0xFF=Pre 2.0, 0x01=2.0

License

This project is licensed under the GPL v3 license.