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/**
* 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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