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
A SHPI.zero with GCC and DFU-programmer installed.
Download GIT folder on your SHPI.zero:
git clone https://github.com/shpi/zero_avr_firmware_std.gitRead 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.
Set RGB LED to white
i2cset -y 2 0x2A 0x8c 0xFF 0xFF 0xFF i
To compile and flash:
cd zero_avr_firmware
sudo make flash| value | commandbyte | in hex | response | format |
|---|---|---|---|---|
| A0 (GD0 CC1101) | 0b00000000 | 0x00 | 10bit in 2 Byte | 0 -1023 |
| A1 (MICS CO) | 0b00000001 | 0x01 | 10bit in 2 Byte | 0 -1023 |
| A2 (MICS No2) | 0b00000010 | 0x02 | 10bit in 2 Byte | 0 -1023 |
| A3 (MICS NH3 | 0b00000011 | 0x03 | 10bit in 2 Byte | 0 -1023 |
| A4 (MP135) | 0b00000100 | 0x04 | 10bit in 2 Byte | 0 -1023 |
| A5 (NTC 10K) | 0b00000101 | 0x05 | 10bit in 2 Byte | 0 -1023 |
| A7 (ACS712) | 0b00000110 | 0x06 | 10bit in 2 Byte | 0 -1023 |
| BL_LEVEL | 0b00000111 | 0x07 | 1 Byte | 0-31 |
| VENT_RPM | 0b00001000 | 0x08 | 2 Byte | UPM |
| VCC Atmega | 0b00001001 | 0x09 | 2 Byte | in Millivolts |
| IntTemp Atmega | 0b00001010 | 0x0A | 2 Byte | degree celsius |
| FREERAM | 0b00001011 | 0x0B | 2 Byte | in Bytes |
| LED_COLOR | 0b00001100 | 0x0C | 3 Byte | R, G, B 0-255 |
| Relay1 | 0b00001101 | 0x0D | 1 Byte | 0x00 / 0xFF |
| Relay2 | 0b00001110 | 0x0E | 1 Byte | 0x00 / 0xFF |
| Relay3 | 0b00001111 | 0x0F | 1 Byte | 0x00 / 0xFF |
| D13 (reset RPI) | 0b00010000 | 0x10 | 1 Byte | 0x00 / 0xFF |
| HWB (gasheater) | 0b00010001 | 0x11 | 1 Byte | 0x00 / 0xFF |
| Buzzer | 0b00010010 | 0x12 | 1 Byte | 0x00 / 0xFF |
| VENT_PWM | 0b00010011 | 0x13 | 1 Byte | 0 – 255 |
| A7_VG(AC curr) | 0b00010110 | 0x14 | 1 Byte | 0 – 1023 |
| command | commandbyte | in hex | expects | value |
|---|---|---|---|---|
| BL_LEVEL_s | 0b10000111 | 0x87 | 1 Byte | 0 = off .. 31= 100% |
| LED_COLOR_s | 0b10001100 | 0x8C | 3 Byte | R, G, B 0-255 |
| Relay1_S | 0b10001101 | 0x8D | 1 Byte | 0x00 / 0xFF |
| Relay2_S | 0b10001110 | 0x8E | 1 Byte | 0x00 / 0xFF |
| Relay3_S | 0b10001111 | 0x8F | 1 Byte | 0x00 / 0xFF |
| D13_S | 0b10010000 | 0x90 | 1 Byte | 0x00 / 0xFF |
| HWB_S | 0b10010001 | 0x91 | 1 Byte | 0x00 / 0xFF |
| Buzzer_S | 0b10010010 | 0x92 | 1 Byte | 0x00 / 0xFF - NEW:0x01 for click |
| VENT_PWM_S | 0b10010011 | 0x93 | 1 Byte | 0 = on .. 255 = off |
This project is licensed under the GPL v3 license.