2017-06-17 21:19:42 +00:00
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/**
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* Marlin 3D Printer Firmware
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* Copyright (C) 2016 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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#ifdef TARGET_LPC1768
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2017-09-06 11:28:32 +00:00
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2017-10-26 18:37:26 +00:00
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#include "LPC1768_PWM.h"
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2017-06-17 21:19:42 +00:00
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#include <lpc17xx_pinsel.h>
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2017-11-19 19:59:40 +00:00
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#include "../../inc/MarlinConfig.h"
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2017-06-17 21:19:42 +00:00
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// Interrupts
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void cli(void) { __disable_irq(); } // Disable
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void sei(void) { __enable_irq(); } // Enable
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// Time functions
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2017-09-27 09:57:33 +00:00
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void _delay_ms(const int delay_ms) {
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2017-09-27 08:47:23 +00:00
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delay(delay_ms);
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2017-06-17 21:19:42 +00:00
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}
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uint32_t millis() {
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return _millis;
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}
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void delayMicroseconds(uint32_t us) {
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2017-08-05 00:20:01 +00:00
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static const int nop_factor = (SystemCoreClock / 11000000);
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2017-06-17 21:19:42 +00:00
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static volatile int loops = 0;
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2017-08-05 00:20:01 +00:00
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//previous ops already burned most of 1us, burn the rest
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loops = nop_factor / 4; //measured at 1us
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while (loops > 0) --loops;
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if (us < 2) return;
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us--;
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//redirect to delay for large values, then set new delay to remainder
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if (us > 1000) {
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delay(us / 1000);
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us = us % 1000;
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}
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2017-10-04 20:40:54 +00:00
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// burn cycles, time in interrupts will not be taken into account
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loops = us * nop_factor;
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while (loops > 0) --loops;
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2017-06-17 21:19:42 +00:00
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}
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2017-09-27 08:47:23 +00:00
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extern "C" void delay(const int msec) {
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volatile millis_t end = _millis + msec;
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SysTick->VAL = SysTick->LOAD; // reset systick counter so next systick is in exactly 1ms
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// this could extend the time between systicks by upto 1ms
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while PENDING(_millis, end) __WFE();
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2017-06-17 21:19:42 +00:00
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}
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// IO functions
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// As defined by Arduino INPUT(0x0), OUPUT(0x1), INPUT_PULLUP(0x2)
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2017-10-26 18:37:26 +00:00
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void pinMode(pin_t pin, uint8_t mode) {
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2017-11-19 20:12:45 +00:00
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if (!VALID_PIN(pin)) return;
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2017-06-17 21:19:42 +00:00
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2017-10-26 18:37:26 +00:00
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PINSEL_CFG_Type config = { LPC1768_PIN_PORT(pin),
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LPC1768_PIN_PIN(pin),
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2017-06-17 21:19:42 +00:00
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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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2017-10-26 18:37:26 +00:00
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LPC_GPIO(LPC1768_PIN_PORT(pin))->FIODIR &= ~LPC_PIN(LPC1768_PIN_PIN(pin));
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2017-06-17 21:19:42 +00:00
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PINSEL_ConfigPin(&config);
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break;
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case OUTPUT:
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2017-10-26 18:37:26 +00:00
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LPC_GPIO(LPC1768_PIN_PORT(pin))->FIODIR |= LPC_PIN(LPC1768_PIN_PIN(pin));
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2017-06-17 21:19:42 +00:00
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PINSEL_ConfigPin(&config);
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break;
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case INPUT_PULLUP:
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2017-10-26 18:37:26 +00:00
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LPC_GPIO(LPC1768_PIN_PORT(pin))->FIODIR &= ~LPC_PIN(LPC1768_PIN_PIN(pin));
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2017-06-17 21:19:42 +00:00
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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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2017-10-26 18:37:26 +00:00
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void digitalWrite(pin_t pin, uint8_t pin_status) {
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2017-11-19 20:12:45 +00:00
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if (!VALID_PIN(pin)) return;
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2017-06-17 21:19:42 +00:00
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if (pin_status)
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2017-10-26 18:37:26 +00:00
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LPC_GPIO(LPC1768_PIN_PORT(pin))->FIOSET = LPC_PIN(LPC1768_PIN_PIN(pin));
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2017-06-17 21:19:42 +00:00
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else
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2017-10-26 18:37:26 +00:00
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LPC_GPIO(LPC1768_PIN_PORT(pin))->FIOCLR = LPC_PIN(LPC1768_PIN_PIN(pin));
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2017-08-08 02:19:15 +00:00
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pinMode(pin, OUTPUT); // Set pin mode on every write (Arduino version does this)
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/**
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* Must be done AFTER the output state is set. Doing this before will cause a
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* 2uS glitch if writing a "1".
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*
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* When the Port Direction bit is written to a "1" the output is immediately set
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* to the value of the FIOPIN bit which is "0" because of power up defaults.
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*/
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2017-06-17 21:19:42 +00:00
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}
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2017-10-26 18:37:26 +00:00
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bool digitalRead(pin_t pin) {
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2017-11-19 20:12:45 +00:00
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if (!VALID_PIN(pin)) return false;
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2017-10-26 18:37:26 +00:00
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return LPC_GPIO(LPC1768_PIN_PORT(pin))->FIOPIN & LPC_PIN(LPC1768_PIN_PIN(pin)) ? 1 : 0;
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2017-06-17 21:19:42 +00:00
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}
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2017-10-26 18:37:26 +00:00
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void analogWrite(pin_t pin, int pwm_value) { // 1 - 254: pwm_value, 0: LOW, 255: HIGH
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2017-11-19 20:12:45 +00:00
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if (!VALID_PIN(pin)) return;
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2017-08-14 19:40:13 +00:00
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#define MR0_MARGIN 200 // if channel value too close to MR0 the system locks up
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static bool out_of_PWM_slots = false;
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uint value = MAX(MIN(pwm_value, 255), 0);
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if (value == 0 || value == 255) { // treat as digital pin
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LPC1768_PWM_detach_pin(pin); // turn off PWM
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digitalWrite(pin, value);
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}
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else {
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2018-01-05 16:10:55 +00:00
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if (LPC1768_PWM_attach_pin(pin, 1, LPC_PWM1->MR0, 0xFF))
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2018-01-01 22:27:19 +00:00
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LPC1768_PWM_write(pin, map(value, 0, 255, 1, LPC_PWM1->MR0)); // map 1-254 onto PWM range
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2017-08-14 19:40:13 +00:00
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else { // out of PWM channels
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2017-10-24 22:28:33 +00:00
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if (!out_of_PWM_slots) MYSERIAL.printf(".\nWARNING - OUT OF PWM CHANNELS\n.\n"); //only warn once
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2017-08-14 19:40:13 +00:00
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out_of_PWM_slots = true;
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digitalWrite(pin, value); // treat as a digital pin if out of channels
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2017-08-13 14:50:12 +00:00
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}
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2017-06-17 21:19:42 +00:00
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}
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}
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extern bool HAL_adc_finished();
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2017-10-26 18:37:26 +00:00
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uint16_t analogRead(pin_t adc_pin) {
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2017-06-17 21:19:42 +00:00
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HAL_adc_start_conversion(adc_pin);
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while (!HAL_adc_finished()); // Wait for conversion to finish
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return HAL_adc_get_result();
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}
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// **************************
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// Persistent Config Storage
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// **************************
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void eeprom_write_byte(unsigned char *pos, unsigned char value) {
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}
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unsigned char eeprom_read_byte(uint8_t * pos) { return '\0'; }
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void eeprom_read_block (void *__dst, const void *__src, size_t __n) { }
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void eeprom_update_block (const void *__src, void *__dst, size_t __n) { }
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char *dtostrf (double __val, signed char __width, unsigned char __prec, char *__s) {
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char format_string[20];
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snprintf(format_string, 20, "%%%d.%df", __width, __prec);
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sprintf(__s, format_string, __val);
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return __s;
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}
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int32_t random(int32_t max) {
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return rand() % max;
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}
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int32_t random(int32_t min, int32_t max) {
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return min + rand() % (max - min);
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}
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void randomSeed(uint32_t value) {
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srand(value);
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}
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2017-08-13 14:50:12 +00:00
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int map(uint16_t x, uint16_t in_min, uint16_t in_max, uint16_t out_min, uint16_t out_max) {
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return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
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}
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2017-06-17 21:19:42 +00:00
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#endif // TARGET_LPC1768
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