encoder and tachometer class for EW3XX single board computer
Diff: EW305sbc.h
- Revision:
- 5:58b13292286e
- Parent:
- 3:b05d231c9549
diff -r 19ee7eb16605 -r 58b13292286e EW305sbc.h --- a/EW305sbc.h Wed Sep 25 16:05:11 2019 +0000 +++ b/EW305sbc.h Mon Aug 16 11:12:19 2021 +0000 @@ -43,9 +43,21 @@ #define NONE_REG 0x07 //No Register Selected +//============================================================================= +// AD5293 Command Set - Table 11 of Datasheet Command Operation Truth Table +//============================================================================= +#define MAX_SCALE 0.9f +#define NOP 0x0 // Do nothing +#define WRDAC 0x1 // Write the contects of the serial register to the RDAC (D9 - D0) +#define RRDAC 0x2 // Read the RDAC wiper setting from SDO in the next frame +#define RESET 0x4 // Refresh the RDAC with midscale code +#define WCON 0x6 // Write contents of serial reg to control reg (D2, D1) +#define RCON 0x7 // Read control register from SDO output in the next frame +#define PWDN 0x8 // Software power down (D0=0 normal mode, D0=1 shutdown mode) + /** - * Tach Interface. + * Tach and motor control Interface. */ class EW305sbc { @@ -93,7 +105,16 @@ */ void LS7366_reset_counter(int chan_num); + /** + * set input voltage to motor + */ + void analog_input(float inp); + /** + * initialize digital potentiometer + */ + void init_ad5293(void); + void reset_ad5293(void); private: @@ -108,6 +129,8 @@ SPI spi;//(PinName p5,PinName p6,PinName p7); DigitalOut ls7166_cs1;//(PinName p19,int tmp=1); //CS for LS7366-1 (U8) DigitalOut ls7166_cs2;//(PinName p20, int tmp=1); //CS for LS7366-2 (U9) + DigitalOut ad5293_sync; // (p12,1); //CS for Digital potentiometer AD5293 + DigitalIn ad5293_rdy; // (p27); // data ready input pin from AD5293 digital pot long count_; float speed_; @@ -135,6 +158,13 @@ * update current speed estimate */ void recalc(void); + + /** + * write data to digital potentiometer + */ + void write_ad5293(int cmd, int data); + + }; #endif /* TACH_H */ \ No newline at end of file