Merge branch 'master' into more-axis

README.md

@@ -1,7 +1,8 @@
 ![GitHub Logo](https://github.com/gnea/gnea-Media/blob/master/Grbl%20Logo/Grbl%20Logo%20250px.png?raw=true)
 
 ***
-_Click the `Release` tab to download pre-compiled `.bin` files or just [click here](https://github.com/cprezzi/grbl-LPC/releases)_
+Old releases are in the `Release` tab. See [cprezzi's branch](https://github.com/cprezzi/grbl-LPC) for more recent releases.
+Note: cprezzi's branch disables current control and has defaults more suitable for other boards.
 ***
 This is GRBL 1.1 ported to the LPC1769. It can run on Smoothieboard.
 
@@ -12,23 +13,20 @@ Usage notes:
 * Only tested with lasers with PWM. Non-PWM spindle control not ported.
 * These are defaults for easy-to-change config values.
   * WPos enabled for LaserWeb compatability ($10=0)
-  * Maximum S value: 1000.0 ($30)
+  * Laser mode: ON ($32)
   * Minimum S value: 0.0 ($31)
-  * Laser mode: 1 ($32)
-* New configuration settings
-  * $33 is PWM frequency in Hz
-  * $34 is PWM off value in %
-  * $35 is PWM min value in %
-  * $36 is PWM max value in %
-  * $140 is X current (amps)
-  * $141 is Y current (amps)
-  * $142 is Z current (amps)
-  * Currents default to 0.0 amps to avoid burning out your motors/drivers
-  * Your motors will likely stall if you don't set these!
-
+  * Maximum S value: 1.0 ($30)
 * Hard limits not yet ported
 * Control inputs not yet ported (e.g. Cycle Start and Safety Door switches)
 
+New configuration settings
+* $33 is PWM frequency in Hz
+* $34 is PWM off value in %
+* $35 is PWM min value in %
+* $36 is PWM max value in %
+* $140, $141, $142 are X, Y, Z current (amps)
+  * Default to 0.0 A to avoid burning out your motors
+  * Your motors will likely stall if you don't set these!
 
 Build notes:
 * Include ```make``` and the ```arm-none-eabi-*``` tools in your path.

grbl/config.h

@@ -37,6 +37,7 @@
 // If doing so, simply comment out these two defines and see instructions below.
 #define CPU_MAP_LPC1769 // NXP LPC1769 boards (like Smoothieboard, Cohesion3D, MKS SBase)
 #define BOARD_C3D       // For boards without i2c stepper current chip (like Cohesion3D).
+
 //#define DEFAULTS_GENERIC
 #define DEFAULTS_K40
 //#define DEFAULTS_FABKIT
@@ -133,6 +134,9 @@
 // define to force Grbl to always set the machine origin at the homed location despite switch orientation.
 // #define HOMING_FORCE_SET_ORIGIN // Uncomment to enable.
 
+// Uncomment this define to force Grbl to always set the machine origin at bottom left.
+#define HOMING_FORCE_POSITIVE_SPACE // Uncomment to enable.
+
 // Number of blocks Grbl executes upon startup. These blocks are stored in EEPROM, where the size
 // and addresses are defined in settings.h. With the current settings, up to 2 startup blocks may
 // be stored and executed in order. These startup blocks would typically be used to set the g-code

grbl/limits.c

@@ -307,9 +307,17 @@ void limits_go_home(uint8_t cycle_mask)
         set_axis_position = 0;
       #else
         if ( bit_istrue(settings.homing_dir_mask,bit(idx)) ) {
-          set_axis_position = lround((settings.max_travel[idx]+settings.homing_pulloff)*settings.steps_per_mm[idx]);
+          #ifdef HOMING_FORCE_POSITIVE_SPACE
+            set_axis_position = 0; //lround(settings.homing_pulloff*settings.steps_per_mm[idx]);
+          #else
+            set_axis_position = lround((settings.max_travel[idx]-settings.homing_pulloff)*settings.steps_per_mm[idx]);
+          #endif
         } else {
-          set_axis_position = lround(-settings.homing_pulloff*settings.steps_per_mm[idx]);
+          #ifdef HOMING_FORCE_POSITIVE_SPACE
+            set_axis_position = lround(-settings.max_travel[idx]*settings.steps_per_mm[idx]);
+          #else
+            set_axis_position = lround(-settings.homing_pulloff*settings.steps_per_mm[idx]);
+          #endif
         }
       #endif
 

grbl/report.c

@@ -71,7 +71,6 @@ static void report_util_setting_string(uint8_t n) {
     case 30: printPgmString(PSTR("rpm max")); break;
     case 31: printPgmString(PSTR("rpm min")); break;
     case 32: printPgmString(PSTR("laser")); break;
-    case 33: printPgmString(PSTR("spindle_pwm_freq")); break;
     default:
       n -= AXIS_SETTINGS_START_VAL;
       uint8_t idx = 0;
@@ -97,11 +96,6 @@ static void report_util_uint8_setting(uint8_t n, int val) {
   print_uint8_base10(val); 
   report_util_line_feed(); // report_util_setting_string(n); 
 }
-static void report_util_uint32_setting(uint8_t n, int val) { 
-  report_util_setting_prefix(n); 
-  print_uint32_base10(val); 
-  report_util_line_feed(); // report_util_setting_string(n); 
-}
 static void report_util_float_setting(uint8_t n, float val, uint8_t n_decimal) { 
   report_util_setting_prefix(n); 
   printFloat(val,n_decimal);

grbl/system.c

@@ -345,7 +345,11 @@ uint8_t system_check_travel_limits(float *target)
       }
     #else
       // NOTE: max_travel is stored as negative
-      if (target[idx] > 0 || target[idx] < settings.max_travel[idx]) { return(true); }
+      #ifdef HOMING_FORCE_POSITIVE_SPACE
+        if (target[idx] < 0 || target[idx] > -settings.max_travel[idx]) { return(true); }
+      #else
+        if (target[idx] > 0 || target[idx] < settings.max_travel[idx]) { return(true); }
+      #endif
     #endif
   }
   return(false);