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MarlinFirmware/Marlin/src/HAL/HAL_LPC1768/arduino.cpp

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/**
* Marlin 3D Printer Firmware
* Copyright (C) 2016 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 <http://www.gnu.org/licenses/>.
*
*/
#ifdef TARGET_LPC1768
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#include "../../inc/MarlinConfig.h"
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#include <lpc17xx_pinsel.h>
// Interrupts
void cli(void) { __disable_irq(); } // Disable
void sei(void) { __enable_irq(); } // Enable
// Time functions
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void _delay_ms(const int delay_ms) {
delay(delay_ms);
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}
uint32_t millis() {
return _millis;
}
void delayMicroseconds(uint32_t us) {
static const int nop_factor = (SystemCoreClock / 11000000);
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static volatile int loops = 0;
//previous ops already burned most of 1us, burn the rest
loops = nop_factor / 4; //measured at 1us
while (loops > 0) --loops;
if (us < 2) return;
us--;
//redirect to delay for large values, then set new delay to remainder
if (us > 1000) {
delay(us / 1000);
us = us % 1000;
}
// burn cycles, time in interrupts will not be taken into account
loops = us * nop_factor;
while (loops > 0) --loops;
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}
extern "C" void delay(const int msec) {
volatile millis_t end = _millis + msec;
SysTick->VAL = SysTick->LOAD; // reset systick counter so next systick is in exactly 1ms
// this could extend the time between systicks by upto 1ms
while PENDING(_millis, end) __WFE();
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}
// IO functions
// As defined by Arduino INPUT(0x0), OUPUT(0x1), INPUT_PULLUP(0x2)
void pinMode(uint8_t pin, uint8_t mode) {
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if (!WITHIN(pin, 0, NUM_DIGITAL_PINS - 1) || pin_map[pin].port == 0xFF)
return;
PINSEL_CFG_Type config = { pin_map[pin].port,
pin_map[pin].pin,
PINSEL_FUNC_0,
PINSEL_PINMODE_TRISTATE,
PINSEL_PINMODE_NORMAL };
switch(mode) {
case INPUT:
LPC_GPIO(pin_map[pin].port)->FIODIR &= ~LPC_PIN(pin_map[pin].pin);
PINSEL_ConfigPin(&config);
break;
case OUTPUT:
LPC_GPIO(pin_map[pin].port)->FIODIR |= LPC_PIN(pin_map[pin].pin);
PINSEL_ConfigPin(&config);
break;
case INPUT_PULLUP:
LPC_GPIO(pin_map[pin].port)->FIODIR &= ~LPC_PIN(pin_map[pin].pin);
config.Pinmode = PINSEL_PINMODE_PULLUP;
PINSEL_ConfigPin(&config);
break;
default:
break;
}
}
void digitalWrite(uint8_t pin, uint8_t pin_status) {
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if (!WITHIN(pin, 0, NUM_DIGITAL_PINS - 1) || pin_map[pin].port == 0xFF)
return;
if (pin_status)
LPC_GPIO(pin_map[pin].port)->FIOSET = LPC_PIN(pin_map[pin].pin);
else
LPC_GPIO(pin_map[pin].port)->FIOCLR = LPC_PIN(pin_map[pin].pin);
pinMode(pin, OUTPUT); // Set pin mode on every write (Arduino version does this)
/**
* Must be done AFTER the output state is set. Doing this before will cause a
* 2uS glitch if writing a "1".
*
* When the Port Direction bit is written to a "1" the output is immediately set
* to the value of the FIOPIN bit which is "0" because of power up defaults.
*/
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}
bool digitalRead(uint8_t pin) {
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if (!WITHIN(pin, 0, NUM_DIGITAL_PINS - 1) || pin_map[pin].port == 0xFF) {
return false;
}
return LPC_GPIO(pin_map[pin].port)->FIOPIN & LPC_PIN(pin_map[pin].pin) ? 1 : 0;
}
void analogWrite(uint8_t pin, int pwm_value) { // 1 - 254: pwm_value, 0: LOW, 255: HIGH
extern bool LPC1768_PWM_attach_pin(uint8_t, uint32_t, uint32_t, uint8_t);
extern bool LPC1768_PWM_write(uint8_t, uint32_t);
extern bool LPC1768_PWM_detach_pin(uint8_t);
#define MR0_MARGIN 200 // if channel value too close to MR0 the system locks up
static bool out_of_PWM_slots = false;
if (!WITHIN(pin, 0, NUM_DIGITAL_PINS - 1) || pin_map[pin].port == 0xFF)
return;
uint value = MAX(MIN(pwm_value, 255), 0);
if (value == 0 || value == 255) { // treat as digital pin
LPC1768_PWM_detach_pin(pin); // turn off PWM
digitalWrite(pin, value);
}
else {
if (LPC1768_PWM_attach_pin(pin, 1, (LPC_PWM1->MR0 - MR0_MARGIN), 0xff)) // locks up if get too close to MR0 value
LPC1768_PWM_write(pin, map(value, 1, 254, 1, (LPC_PWM1->MR0 - MR0_MARGIN))); // map 1-254 onto PWM range
else { // out of PWM channels
if (!out_of_PWM_slots) MYSERIAL.printf(".\nWARNING - OUT OF PWM CHANNELS\n.\n"); //only warn once
out_of_PWM_slots = true;
digitalWrite(pin, value); // treat as a digital pin if out of channels
}
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}
}
extern bool HAL_adc_finished();
uint16_t analogRead(uint8_t adc_pin) {
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HAL_adc_start_conversion(adc_pin);
while (!HAL_adc_finished()); // Wait for conversion to finish
return HAL_adc_get_result();
}
// **************************
// Persistent Config Storage
// **************************
void eeprom_write_byte(unsigned char *pos, unsigned char value) {
}
unsigned char eeprom_read_byte(uint8_t * pos) { return '\0'; }
void eeprom_read_block (void *__dst, const void *__src, size_t __n) { }
void eeprom_update_block (const void *__src, void *__dst, size_t __n) { }
char *dtostrf (double __val, signed char __width, unsigned char __prec, char *__s) {
char format_string[20];
snprintf(format_string, 20, "%%%d.%df", __width, __prec);
sprintf(__s, format_string, __val);
return __s;
}
int32_t random(int32_t max) {
return rand() % max;
}
int32_t random(int32_t min, int32_t max) {
return min + rand() % (max - min);
}
void randomSeed(uint32_t value) {
srand(value);
}
int map(uint16_t x, uint16_t in_min, uint16_t in_max, uint16_t out_min, uint16_t out_max) {
return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}
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#endif // TARGET_LPC1768