Code to drive a CNC machine via a PC LPT port lookalike 25 pin 'D', experiment in 'PC/Mach3' replacement. Designed to compile and run on mbed LPC1768, Freescale KL25Z and Freescale KL46Z. Proved on LPC1768 and KL25Z, problem with serial port on KL46Z. Reads subset of 'G Codes' through usb/serial port and drives 3 stepper/servo drives for X, Y and Z, also similar Step/Dir outputs for spindle motor control. Emulates PC LPT, outputs 'charge pump', proved driving Seig KX3 CNC mill
cnc.h
- Committer:
- JonFreeman
- Date:
- 2014-02-06
- Revision:
- 1:66ee619f206b
- Parent:
- 0:5d0f270bfc87
- Child:
- 2:b3c668ec43ac
File content as of revision 1:66ee619f206b:
const double TWO_PI = 8.0 * atan(1.0); const double epsilon = 1e-5; struct pirbufgrain { double x, y, z, c, f_rate; } ; struct singleGparam { // Place to put all we know about 'x' or 'j' etc parameter from G Code line double dbl; unsigned long ul; int i, c; bool changed; // Flagged true when new value for this axis found in Gcode line, false otherwise } ; struct Gparams { // Where possibly messy G code line gets ordered and sorted into struct singleGparam x, y, z, i, j, r, a, b, c, d; // After sorting, know where to find any X, Y etc values ! } ; struct digital_readouts { // DROs keep count of 'Step' positive edges detected in interrupt handler signed long x, y, z; // Could easily expand up to six or more dros bool dro_output; // To enabe / disable output to terminal } ; extern const double n_for_onemmpermin, feed_rate_max, feed_rate_min, spindle_min, spindle_max; //extern const long pulses_per_mm, max_mm_per_min, interrupt_period_us; extern const double pulses_per_mm, max_mm_per_min, interrupt_period_us;