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113 lines
3.6 KiB
113 lines
3.6 KiB
/**
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* Marlin 3D Printer Firmware
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* Copyright (C) 2016, 2017 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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*
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* Based on Sprinter and grbl.
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* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/**
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* Low level pin manipulation routines - used by all the drivers.
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*
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* These are based on the LPC1768 pinMode, digitalRead & digitalWrite routines.
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*
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* Couldn't just call exact copies because the overhead killed the LCD update speed
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* With an intermediate level the softspi was running in the 10-20kHz range which
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* resulted in using about about 25% of the CPU's time.
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*/
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#ifdef TARGET_LPC1768
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#include <LPC17xx.h>
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#include <lpc17xx_pinsel.h>
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#include "src/core/macros.h"
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//#include "pinmapping.h"
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#define LPC_PORT_OFFSET (0x0020)
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#define LPC_PIN(pin) (1UL << pin)
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#define LPC_GPIO(port) ((volatile LPC_GPIO_TypeDef *)(LPC_GPIO0_BASE + LPC_PORT_OFFSET * port))
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#define INPUT 0
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#define OUTPUT 1
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#define INPUT_PULLUP 2
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uint8_t LPC1768_PIN_PORT(const uint8_t pin);
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uint8_t LPC1768_PIN_PIN(const uint8_t pin);
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#ifdef __cplusplus
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extern "C" {
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#endif
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// I/O functions
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// As defined by Arduino INPUT(0x0), OUPUT(0x1), INPUT_PULLUP(0x2)
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void pinMode_LCD(uint8_t pin, uint8_t mode) {
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#define LPC1768_PIN_PORT(pin) ((uint8_t)((pin >> 5) & 0b111))
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#define LPC1768_PIN_PIN(pin) ((uint8_t)(pin & 0b11111))
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PINSEL_CFG_Type config = { LPC1768_PIN_PORT(pin),
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LPC1768_PIN_PIN(pin),
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PINSEL_FUNC_0,
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PINSEL_PINMODE_TRISTATE,
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PINSEL_PINMODE_NORMAL };
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switch(mode) {
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case INPUT:
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LPC_GPIO(LPC1768_PIN_PORT(pin))->FIODIR &= ~LPC_PIN(LPC1768_PIN_PIN(pin));
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PINSEL_ConfigPin(&config);
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break;
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case OUTPUT:
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LPC_GPIO(LPC1768_PIN_PORT(pin))->FIODIR |= LPC_PIN(LPC1768_PIN_PIN(pin));
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PINSEL_ConfigPin(&config);
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break;
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case INPUT_PULLUP:
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LPC_GPIO(LPC1768_PIN_PORT(pin))->FIODIR &= ~LPC_PIN(LPC1768_PIN_PIN(pin));
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config.Pinmode = PINSEL_PINMODE_PULLUP;
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PINSEL_ConfigPin(&config);
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break;
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default:
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break;
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}
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}
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void u8g_SetPinOutput(uint8_t internal_pin_number) {
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pinMode_LCD(internal_pin_number, 1); // OUTPUT
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}
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void u8g_SetPinInput(uint8_t internal_pin_number) {
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pinMode_LCD(internal_pin_number, 0); // INPUT
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}
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void u8g_SetPinLevel(uint8_t pin, uint8_t pin_status) {
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#define LPC1768_PIN_PORT(pin) ((uint8_t)((pin >> 5) & 0b111))
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#define LPC1768_PIN_PIN(pin) ((uint8_t)(pin & 0b11111))
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if (pin_status)
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LPC_GPIO(LPC1768_PIN_PORT(pin))->FIOSET = LPC_PIN(LPC1768_PIN_PIN(pin));
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else
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LPC_GPIO(LPC1768_PIN_PORT(pin))->FIOCLR = LPC_PIN(LPC1768_PIN_PIN(pin));
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}
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uint8_t u8g_GetPinLevel(uint8_t pin) {
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#define LPC1768_PIN_PORT(pin) ((uint8_t)((pin >> 5) & 0b111))
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#define LPC1768_PIN_PIN(pin) ((uint8_t)(pin & 0b11111))
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return (uint32_t)LPC_GPIO(LPC1768_PIN_PORT(pin))->FIOPIN & LPC_PIN(LPC1768_PIN_PIN(pin)) ? 1 : 0;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif // TARGET_LPC1768
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