AS5048A SPI - Magnetic rotary encoder library
Library for communication over the SPI interface with the ams.com AS5048A magnetic rotary encoder.
Example:
Simple readout of a single angle measurement from a single sensor on the SPI-bus
#include "mbed.h"
#include <as5048spi.h>
// The sensors connection are attached to pins 5-8
As5048Spi sensor(p5, p6, p7, p8);
Serial pc(USBTX, USBRX); // tx, rx
int main() {
while(1) {
//
const int* angles = sensor.read_angle();
int angle = angles[0];
// The read angle returns the value returned over the SPI bus, including parity bit
pc.printf("Read result: %x\r\n", angle);
if( As5048Spi::parity_check(angle) )
{
// Convert range from 0 to 2^14-1 to 0 - 360 degrees
int degrees = As5048Spi::degrees(angle)/100;
pc.printf("Parity check succesfull.\r\n");
pc.printf("Angle: %i degrees\r\n", degrees );
}
else
{
pc.printf("Parity check failed.\r\n");
}
wait_ms(500);
}
}
The class supports daisy chaining multiple sensors on the SPI-bus as well. See: SPI-Daisy-Chaining.
Files at revision 4:06b89a41109e
| Name | Size | Actions |
|---|---|---|
| [up] | ||
| as5048spi.cpp | 3154 | Revisions Annotate |
| as5048spi.h | 3247 | Revisions Annotate |