Trikarus/firmware_smartstepper_trikarus/stepper_nano_zero/A4954.h
2020-07-20 22:21:36 +02:00

91 lines
3.2 KiB
C++

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#ifndef __A4954__H__
#define __A4954__H__
#include <Arduino.h>
#include "board.h"
#include "angle.h"
#include "sine.h"
#define A4954_NUM_MICROSTEPS (256)
#define A4954_MIN_TIME_BETWEEN_STEPS_MICROS (1000)
//prevent someone for making a mistake with the code
#if ((A4954_NUM_MICROSTEPS*4) != SINE_STEPS)
#error "SINE_STEPS must be 4x of Micro steps for the move function"
#endif
/*
* When it comes to the stepper driver if we use angles
* we will always have a rounding error. For example
* a 0-65536(360) angle for 1.8 degree step is 327.68 so
* if you increment 200 of these as 327 you have a 13.6 error
* after one rotation.
* If you use floating point the effect is the same but takes longer.
*
* The only error-less accumulation system is to use native units, ie full
* steps and microsteps.
*
*/
class A4954
{
private:
uint32_t lastStepMicros; // time in microseconds that last step happened
bool forwardRotation=true;
volatile bool enabled=true;
public:
void begin(void);
//moves motor where the modulo of A4954_NUM_MICROSTEPS is a full step.
int32_t move(int32_t stepAngle, uint32_t mA);
uint32_t microsSinceStep(void) {return micros()-lastStepMicros;};
void setRotationDirection(bool forward) {forwardRotation=forward;};
void enable(bool enable);
void limitCurrent(uint8_t percent); //higher more current
};
#endif //__A4954__H__