The Serial Peripheral Interface library is an abstract interface for bus managers and device driver support. the library contains bus manager implementations for hardware resources (AVR SPI and USI) and software using Ardino-GPIO.
Version: 1.8
- Abstract SPI Bus Manager and Device Driver Interface, SPI
- Hardware SPI Bus Manager, Hardware::SPI
- Software SPI Bus Manager, Software::SPI
Benchmarks include bus acquire-release (multitasking support), and slave select pin handling.
| Operation (LSB @ 570 kHz) | Bytes | us |
|---|---|---|
| transfer | 1 | 16.62 |
| read | 4 | 70.19 |
| write | 4 | 68.75 |
| transfer | 4 | 70.75 |
| Operation (MSB @ 760 kHz) | Bytes | us |
|---|---|---|
| transfer | 1 | 13.81 |
| read | 4 | 55.94 |
| write | 4 | 56.31 |
| transfer | 4 | 58.5 |
| Wiring | us | SPI | us | Xn |
|---|---|---|---|---|
| shiftIn | 84.19 | var = spi.transfer(0) | 15.75 | 5.35 |
| shiftOut | 108.9 | spi.transfer(var) | 15.00 | 7.26 |
| Operation (LSB/MSB @ 8 MHz) | Bytes | us |
|---|---|---|
| transfer | 1 | 3.44 |
| read | 4 | 8.50 |
| write | 4 | 8.44 |
| transfer | 4 | 8.96 |