MarlinFirmware · Roxy-3D · Jun 22, 2017
diff --git a/Marlin/pins_RAMPS.h b/Marlin/pins_RAMPS.h
@@ -44,7 +44,7 @@
  *         7 | 11
  */
 
-#if !defined(IS_RAMPS_SMART) && !defined(IS_RAMPS_DUO) && !defined(IS_RAMPS4DUE)
+#if !defined(IS_RAMPS_SMART) && !defined(IS_RAMPS_DUO) && !defined(IS_RAMPS4DUE) && !defined(TARGET_LPC1768)
   #if !defined(__AVR_ATmega1280__) && !defined(__AVR_ATmega2560__)
     #error "Oops!  Make sure you have 'Arduino Mega' selected from the 'Tools -> Boards' menu."
   #endif
@@ -208,6 +208,15 @@
 
 #define PS_ON_PIN          12
 
+#if ENABLED(CASE_LIGHT_ENABLE) && !PIN_EXISTS(CASE_LIGHT) && !defined(SPINDLE_LASER_ENABLE_PIN)
+  #if !defined(NUM_SERVOS) || NUM_SERVOS == 0 // try to use servo connector first
+    #define CASE_LIGHT_PIN   6      // MUST BE HARDWARE PWM
+  #elif !(ENABLED(ULTRA_LCD) && ENABLED(NEWPANEL) \
+      && (ENABLED(PANEL_ONE) || ENABLED(VIKI2) || ENABLED(miniVIKI) || ENABLED(MINIPANEL) || ENABLED(REPRAPWORLD_KEYPAD)))  // try to use AUX 2
+    #define CASE_LIGHT_PIN   44     // MUST BE HARDWARE PWM
+  #endif
+#endif
+
 //
 // LCD / Controller
 //
@@ -271,10 +280,10 @@
       #define SD_DETECT_PIN -1
       #define KILL_PIN 41
     #elif ENABLED(LCD_I2C_VIKI)
-      #define BTN_EN1 22  // reverse if the encoder turns the wrong way.
-      #define BTN_EN2 7   // http://files.panucatt.com/datasheets/viki_wiring_diagram.pdf
-                          // tells about 40/42.
-                          // 22/7 are unused on RAMPS_14. 22 is unused and 7 the SERVO0_PIN on RAMPS_13.
+
+      #define BTN_EN1           22 // http://files.panucatt.com/datasheets/viki_wiring_diagram.pdf explains 40/42.
+      #define BTN_EN2            7 // 22/7 are unused on RAMPS_14. 22 is unused and 7 the SERVO0_PIN on RAMPS_13.
+
       #define BTN_ENC -1
       #define LCD_SDSS 53
       #define SD_DETECT_PIN 49

diff --git a/Marlin/src/HAL/HAL.h b/Marlin/src/HAL/HAL.h
@@ -87,6 +87,10 @@ void spiSendBlock(uint8_t token, const uint8_t* buf);
   #define CPU_32_BIT
   #include "HAL_TEENSY35_36/HAL_Teensy.h"
   #include "math_32bit.h"
+#elif defined(TARGET_LPC1768)
+  #define CPU_32_BIT
+  #include "math_32bit.h"
+  #include "HAL_LPC1768/HAL.h"
 #else
   #error Unsupported Platform!
 #endif

diff --git a/Marlin/src/HAL/HAL_LPC1768/HAL.cpp b/Marlin/src/HAL/HAL_LPC1768/HAL.cpp
@@ -0,0 +1,177 @@
+/* **************************************************************************
+
+ Marlin 3D Printer Firmware
+ Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program.  If not, see <http://www.gnu.org/licenses/>.
+****************************************************************************/
+
+
+/**
+ *
+ * For TARGET_LPC1768
+ */
+
+#ifdef TARGET_LPC1768
+
+#include "../HAL.h"
+
+HalSerial usb_serial(USBTX, USBRX);
+Timer system_counter;
+
+//u8glib required fucntions
+extern "C" void u8g_xMicroDelay(uint16_t val) {
+  delayMicroseconds(val);
+}
+extern "C" void u8g_MicroDelay(void) {
+  u8g_xMicroDelay(1);
+}
+extern "C" void u8g_10MicroDelay(void) {
+  u8g_xMicroDelay(10);
+}
+extern "C" void u8g_Delay(uint16_t val) {
+  u8g_xMicroDelay(val*1000);
+}
+//************************//
+
+int availableMemory(int resolution = 16, int maximum = 0x4000, bool disableInterrupts = false) {
+    if (resolution < 1) resolution = 1;
+    if (maximum < 0) maximum = 0;
+
+    int low = 0;
+    int high = maximum + 1;
+
+    if (disableInterrupts) __disable_irq();
+    while (high - low > resolution) {
+        int mid = (low + high) / 2;
+        void* p = malloc(mid);
+        if (p == NULL) {
+            high = mid;
+        } else {
+            free(p);
+            low = mid;
+        }
+    }
+    if (disableInterrupts) __enable_irq();
+    return low;
+}
+
+// return free memory between end of heap (or end bss) and whatever is current
+int freeMemory(){
+	return availableMemory();
+}
+
+
+// --------------------------------------------------------------------------
+// ADC
+// --------------------------------------------------------------------------
+
+#define ADC_DONE		  0x80000000
+#define ADC_OVERRUN		0x40000000
+
+void HAL_adc_init(void) {
+  LPC_SC->PCONP |= (1 << 12);   // Enable CLOCK for internal ADC controller
+  LPC_SC->PCLKSEL0 &= ~(0x3 << 24);
+  LPC_SC->PCLKSEL0 |= (0x1 << 24);
+  LPC_ADC->ADCR = (0 << 0)      // SEL: 0 = no channels selected
+                | (8 << 8)      // CLKDIV: PCLK max ~= 25MHz, /25 to give safe 1MHz at fastest
+                | (0 << 16)     // BURST: 0 = software control
+                | (0 << 17)     // CLKS: not applicable
+                | (1 << 21)     // PDN: 1 = operational
+                | (0 << 24)     // START: 0 = no start
+                | (0 << 27);    // EDGE: not applicable
+}
+
+void HAL_adc_enable_channel(int pin) {
+  LPC_PINCON->PINSEL1 &= ~0x000FC000;
+  LPC_PINCON->PINSEL1 |= 0x00054000;
+  //LPC_PINCON->PINSEL3 |= 0xC0000000;
+}
+
+void HAL_adc_start_conversion(uint8_t adc_pin) {
+  if(adc_pin_map[adc_pin].port == 0xFF) {
+    MYSERIAL.serial_port.printf("HAL: HAL_adc_start_conversion: no pinmap for %d\r\n",adc_pin);
+    return;
+  }
+  LPC_ADC->ADCR &= ~0xFF;                                // Reset
+  LPC_ADC->ADCR |= ( 0x01 << adc_pin_map[adc_pin].adc ); // Select Channel
+  LPC_ADC->ADCR |= ( 0x01 << 24 );                       // start conversion
+}
+
+uint16_t HAL_adc_get_result(void) {
+  uint32_t data = LPC_ADC->ADGDR;
+  LPC_ADC->ADCR &= ~(1 << 24); //stop conversion
+  if ( data & ADC_OVERRUN ) return 0;
+  return ((data >> 6) & 0x3ff); //10bit
+}
+
+// ---------------------
+// Userspace entry point
+// ---------------------
+extern void setup();
+extern void loop();
+
+void pinMode(int pin, int mode);
+void digitalWrite(int pin, int pin_status);
+bool digitalRead(int pin);
+
+extern "C" void SysTick_Handler(void) {
+  _millis++;
+}
+
+#define SBIT_CNTEN     0
+#define SBIT_PWMEN     2
+#define SBIT_PWMMR0R   1
+
+#define PWM_1          0  //P2_0 (0-1 Bits of PINSEL4)
+#define PWM_2          2  //P2_1 (2-3 Bits of PINSEL4)
+#define PWM_3          4  //P2_2 (4-5 Bits of PINSEL4)
+#define PWM_4          6  //P2_3 (6-7 Bits of PINSEL4)
+#define PWM_5          8  //P2_4 (8-9 Bits of PINSEL4)
+#define PWM_6          10 //P2_5 (10-11 Bits of PINSEL4)
+
+void HAL_pwm_init(void) {
+  LPC_PINCON->PINSEL4 = (1<<PWM_5) | (1<<PWM_6);
+
+  LPC_PWM1->TCR = (1<<SBIT_CNTEN) | (1<<SBIT_PWMEN);
+  LPC_PWM1->PR  =  0x0;               // No prescalar
+  LPC_PWM1->MCR = (1<<SBIT_PWMMR0R);  // Reset on PWMMR0, reset TC if it matches MR0
+  LPC_PWM1->MR0 = 255;                /* set PWM cycle(Ton+Toff)=255) */
+  LPC_PWM1->MR5 = 0;                  /* Set 50% Duty Cycle for the channels */
+  LPC_PWM1->MR6 = 0;
+
+  // Trigger the latch Enable Bits to load the new Match Values MR0, MR5, MR6
+  LPC_PWM1->LER = (1<<0) | (1<<5) | (1<<6);
+  // Enable the PWM output pins for PWM_5-PWM_6(P2_4 - P2_5)
+  LPC_PWM1->PCR = (1<<13) | (1<<14);
+}
+
+extern "C" int main() {
+  SysTick_Config(SystemCoreClock / 1000);
+  // Enable GPIO clock
+  LPC_SC->PCONP |=  (1 << 15);
+
+  HAL_timer_init();
+  //HAL_pwm_init();
+
+  system_counter.start(); //todo: rethink micros?
+  setup();
+
+  while (true) {
+    loop();
+  }
+}
+
+#endif // TARGET_LPC1768
diff --git a/Marlin/src/HAL/HAL_LPC1768/HAL.h b/Marlin/src/HAL/HAL_LPC1768/HAL.h
@@ -0,0 +1,102 @@
+/**
+ * Marlin 3D Printer Firmware
+ *
+ * Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
+ * Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * Description: HAL for Arduino Due and compatible (SAM3X8E)
+ *
+ * For ARDUINO_ARCH_SAM
+ */
+
+#ifndef _HAL_LPC1768_H
+#define _HAL_LPC1768_H
+
+// --------------------------------------------------------------------------
+// Includes
+// --------------------------------------------------------------------------
+
+#include <stdint.h>
+#include <algorithm>
+
+#define RETARGET_H // todo: this "disables" a conflicting header in mbed local filesystem implementation
+#include <mbed.h>
+#undef PACKED
+
+extern Timer system_counter;
+extern uint32_t _millis;
+
+#define USBCON
+
+//arduino: Print.h
+#define DEC 10
+#define HEX 16
+#define OCT 8
+#define BIN 2
+//arduino: binary.h (weird defines)
+#define B01 1
+#define B10 2
+
+#include "arduino.h"
+#include "pinmapping.h"
+#include "fastio.h"
+#include "watchdog.h"
+#include "serial.h"
+#include "HAL_timers.h"
+
+
+//todo: why so much higher than arduino? 96Mhz, 20cycle low (208ns), 25 cycle data(260ns), 25cycle high(260ns)
+#define ST7920_DELAY_1 DELAY_5_NOP;DELAY_5_NOP;DELAY_5_NOP;DELAY_5_NOP
+#define ST7920_DELAY_2 DELAY_5_NOP;DELAY_5_NOP;DELAY_5_NOP;DELAY_5_NOP;DELAY_5_NOP
+#define ST7920_DELAY_3 DELAY_5_NOP;DELAY_5_NOP;DELAY_5_NOP;DELAY_5_NOP;DELAY_5_NOP
+
+//Serial override
+extern HalSerial usb_serial;
+#define MYSERIAL usb_serial
+
+#ifndef analogInputToDigitalPin
+  #define analogInputToDigitalPin(p) ((p < 12u) ? (p) + 54u : -1)
+#endif
+
+#define CRITICAL_SECTION_START	uint32_t primask=__get_PRIMASK(); __disable_irq();
+#define CRITICAL_SECTION_END    if (primask==0) __enable_irq();
+
+//Utility functions
+int freeMemory(void);
+
+// SPI: Extended functions which take a channel number (hardware SPI only)
+/** Write single byte to specified SPI channel */
+void spiSend(uint32_t chan, byte b);
+/** Write buffer to specified SPI channel */
+void spiSend(uint32_t chan, const uint8_t* buf, size_t n);
+/** Read single byte from specified SPI channel */
+uint8_t spiRec(uint32_t chan);
+
+// ADC
+#define HAL_ANALOG_SELECT(pin) HAL_adc_enable_channel(pin)
+#define HAL_START_ADC(pin)     HAL_adc_start_conversion(pin)
+#define HAL_READ_ADC           HAL_adc_get_result()
+
+void HAL_adc_init(void);
+void HAL_adc_enable_channel(int pin);
+void HAL_adc_start_conversion (uint8_t adc_pin);
+uint16_t HAL_adc_get_result(void);
+
+#endif // _HAL_LPC1768_H