https://github.com/michaelkrone/attiny-pid
ATTiny85 I2C controllable PID controller
https://github.com/michaelkrone/attiny-pid
attiny85 i2c pid-control
Last synced: about 1 year ago
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ATTiny85 I2C controllable PID controller
- Host: GitHub
- URL: https://github.com/michaelkrone/attiny-pid
- Owner: michaelkrone
- License: apache-2.0
- Created: 2018-04-14T22:57:17.000Z (about 8 years ago)
- Default Branch: master
- Last Pushed: 2020-12-18T11:57:43.000Z (over 5 years ago)
- Last Synced: 2025-04-22T21:04:45.671Z (about 1 year ago)
- Topics: attiny85, i2c, pid-control
- Language: C++
- Size: 31.3 KB
- Stars: 4
- Watchers: 1
- Forks: 2
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# ATTiny85 PID Controller
This library provides an I2C controllable ATTiny85 PID controller.
### Two pin control
| Function | Name | ATTiny85 | Olimexino85 |
|----------|------|-------------|----------|
| SCL | PB2 | 7 | 2 |
| SDA | PB0 | 5 | 0 |
| MOTOR_UP | PB11 | 6 | 1 |
| MOTOR_DOWN | PB42 | 3 | 4 |
| SIGNAL_READ | A3 | 2 | 3 |
1PWM on timer 0; ~500 Hz
2PWM on timer 1; ~1000Hz
### Three pin control
| Function | Name | ATTiny85 | Olimexino85 |
|----------|------|----------|-------------|
| SCL | PB2 | 7 | 2 |
| SDA | PB0 | 5 | 0 |
| MOTOR_UP | PB5/#RESET | 1 | #RST |
| MOTOR_DOWN | PB4 | 3 | 4 |
| MOTOR_SPEED | PB11 | 6 | 1 |
| SIGNAL_READ | A3 | 2 | 3 |
1PWM on timer 0; ~500 Hz
The following I2C commands are supported:
```
MOTOR_I2C_COMMAND_STOP
MOTOR_I2C_COMMAND_HALT
PID_I2C_COMMAND_ENABLE
PID_I2C_COMMAND_DISABLE
PID_I2C_COMMAND_RESET
PID_I2C_COMMAND_SET_VALUE
PID_I2C_COMMAND_SET_K_P
PID_I2C_COMMAND_SET_K_I
PID_I2C_COMMAND_SET_K_D
PID_I2C_COMMAND_SET_DEAD_BAND
```
Reading the measurement value:
```
// Read from Slave
Wire.requestFrom(target, (size_t)(sizeof i2cData.parameterValue));
if (Wire.getError())
{
Serial.print("FAIL\n");
}
else
{
// If no error then read Rx data into buffer and print
uint8_t len = io::i2cRead(i2cData.parameterValue, true);
// Serial.printf("read bytes: %d, value: %d\n", len, i2cData.parameterValue);
}
```
Example for sending a byte command:
```
Wire.beginTransmission(0x4); // Slave address
io::i2cWrite(PID_I2C_COMMAND_ENABLE); // Write string to I2C Tx buffer (incl. string null at end)
Wire.endTransmission();
if (Wire.getError())
...
```
Example for sending a command with a parameter:
```
i2cData.parameterValue = 10;
Wire.beginTransmission(0x4); // Slave address
io::i2cWrite(PID_I2C_COMMAND_SET_K_P);
io::i2cWrite(i2cData.parameterValue);
Wire.endTransmission();
if (Wire.getError())
...
```