73 7-channel PWM driver controlled via SPI bus
73 : 7-channel PWM driver controlled via SPI bus
- Author: Ivan Krasin
- Description: PWM driver with 7 channels and 256 PWM levels from 0 to 1
- GitHub repository
- Open in 3D viewer
- Clock: 1000 Hz
How it works
uses a 8-bit counter to drive PWM on 7 output channels. Each channel is controlled by a dedicated 8-bit register that specifies its PWM level: 0 means always off, 1 is for 1/255 on, 5 is for 5/255 on and 255 is 255/255 (always on)
How to test
after reset, all output pins will be low. Use SPI writes with register addresses (0..6) to set 8-bit PWM levels. The corresponding pin will start oscillating between 0 and 1 according to the clock and the set level.
IO
| # | Input | Output |
|---|---|---|
| 0 | clock | out0 |
| 1 | reset | out1 |
| 2 | cs | out2 |
| 3 | sclk | out3 |
| 4 | mosi | out4 |
| 5 | reserved | out5 |
| 6 | reserved | out6 |
| 7 | reserved | miso |