From e8701195e66f2d27ffe17fb514eae8173795aaf7 Mon Sep 17 00:00:00 2001
From: Georgiy Bondarenko <69736697+nehilo@users.noreply.github.com>
Date: Thu, 4 Mar 2021 22:54:23 +0500
Subject: Initial commit

---
 Marlin/src/HAL/LPC1768/u8g/LCD_pin_routines.c | 110 ++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 Marlin/src/HAL/LPC1768/u8g/LCD_pin_routines.c

(limited to 'Marlin/src/HAL/LPC1768/u8g/LCD_pin_routines.c')

diff --git a/Marlin/src/HAL/LPC1768/u8g/LCD_pin_routines.c b/Marlin/src/HAL/LPC1768/u8g/LCD_pin_routines.c
new file mode 100644
index 0000000..466fc80
--- /dev/null
+++ b/Marlin/src/HAL/LPC1768/u8g/LCD_pin_routines.c
@@ -0,0 +1,110 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * Low level pin manipulation routines - used by all the drivers.
+ *
+ * These are based on the LPC1768 pinMode, digitalRead & digitalWrite routines.
+ *
+ * Couldn't just call exact copies because the overhead killed the LCD update speed
+ * With an intermediate level the softspi was running in the 10-20kHz range which
+ * resulted in using about about 25% of the CPU's time.
+ */
+
+#ifdef TARGET_LPC1768
+
+#include <LPC17xx.h>
+#include <lpc17xx_pinsel.h>
+#include "../../../core/macros.h"
+//#include <pinmapping.h>
+
+#define LPC_PORT_OFFSET         (0x0020)
+#define LPC_PIN(pin)            (1UL << pin)
+#define LPC_GPIO(port)          ((volatile LPC_GPIO_TypeDef *)(LPC_GPIO0_BASE + LPC_PORT_OFFSET * port))
+
+#define INPUT 0
+#define OUTPUT 1
+#define INPUT_PULLUP 2
+
+uint8_t LPC1768_PIN_PORT(const uint8_t pin);
+uint8_t LPC1768_PIN_PIN(const uint8_t pin);
+
+#ifdef __cplusplus
+  extern "C" {
+#endif
+
+// I/O functions
+// As defined by Arduino INPUT(0x0), OUTPUT(0x1), INPUT_PULLUP(0x2)
+void pinMode_LCD(uint8_t pin, uint8_t mode) {
+  #define LPC1768_PIN_PORT(pin) ((uint8_t)((pin >> 5) & 0b111))
+  #define LPC1768_PIN_PIN(pin) ((uint8_t)(pin & 0b11111))
+  PINSEL_CFG_Type config = { LPC1768_PIN_PORT(pin),
+                             LPC1768_PIN_PIN(pin),
+                             PINSEL_FUNC_0,
+                             PINSEL_PINMODE_TRISTATE,
+                             PINSEL_PINMODE_NORMAL };
+  switch (mode) {
+    case INPUT:
+      LPC_GPIO(LPC1768_PIN_PORT(pin))->FIODIR &= ~LPC_PIN(LPC1768_PIN_PIN(pin));
+      PINSEL_ConfigPin(&config);
+      break;
+    case OUTPUT:
+      LPC_GPIO(LPC1768_PIN_PORT(pin))->FIODIR |=  LPC_PIN(LPC1768_PIN_PIN(pin));
+      PINSEL_ConfigPin(&config);
+      break;
+    case INPUT_PULLUP:
+      LPC_GPIO(LPC1768_PIN_PORT(pin))->FIODIR &= ~LPC_PIN(LPC1768_PIN_PIN(pin));
+      config.Pinmode = PINSEL_PINMODE_PULLUP;
+      PINSEL_ConfigPin(&config);
+      break;
+    default: break;
+  }
+}
+
+void u8g_SetPinOutput(uint8_t internal_pin_number) {
+   pinMode_LCD(internal_pin_number, 1);  // OUTPUT
+}
+
+void u8g_SetPinInput(uint8_t internal_pin_number) {
+   pinMode_LCD(internal_pin_number, 0);  // INPUT
+}
+
+void u8g_SetPinLevel(uint8_t  pin, uint8_t  pin_status) {
+  #define LPC1768_PIN_PORT(pin) ((uint8_t)((pin >> 5) & 0b111))
+  #define LPC1768_PIN_PIN(pin) ((uint8_t)(pin & 0b11111))
+  if (pin_status)
+    LPC_GPIO(LPC1768_PIN_PORT(pin))->FIOSET = LPC_PIN(LPC1768_PIN_PIN(pin));
+  else
+    LPC_GPIO(LPC1768_PIN_PORT(pin))->FIOCLR = LPC_PIN(LPC1768_PIN_PIN(pin));
+}
+
+uint8_t u8g_GetPinLevel(uint8_t pin) {
+  #define LPC1768_PIN_PORT(pin) ((uint8_t)((pin >> 5) & 0b111))
+  #define LPC1768_PIN_PIN(pin) ((uint8_t)(pin & 0b11111))
+  return (uint32_t)LPC_GPIO(LPC1768_PIN_PORT(pin))->FIOPIN & LPC_PIN(LPC1768_PIN_PIN(pin)) ? 1 : 0;
+}
+
+#ifdef __cplusplus
+  }
+#endif
+
+#endif // TARGET_LPC1768
-- 
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