thebears/marlin_skr
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

HAL for Re:ARM (LPC1768) architecture

Browse Source
This commit is contained in:
Christopher Pepper
2017-06-17 22:19:42 +01:00
committed by Scott Lahteine
parent f3e562e46e
commit 44b0c186a6
122 changed files with 67493 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

168
Marlin/src/HAL/HAL_LPC1768/HAL.cpp Normal file
View File

@@ -0,0 +1,168 @@
/* **************************************************************************
Marlin 3D Printer Firmware
Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
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/>.
****************************************************************************/
/**
*
* For TARGET_LPC1768
*/
#ifdef TARGET_LPC1768
#include "../HAL.h"
extern "C" {
//#include <lpc17xx_adc.h>
//#include <lpc17xx_pinsel.h>
}
HalSerial usb_serial;
//u8glib required fucntions
extern "C" void u8g_xMicroDelay(uint16_t val) {
delayMicroseconds(val);
}
extern "C" void u8g_MicroDelay(void) {
u8g_xMicroDelay(1);
}
extern "C" void u8g_10MicroDelay(void) {
u8g_xMicroDelay(10);
}
extern "C" void u8g_Delay(uint16_t val) {
delay(val);
}
//************************//
// return free heap space
int freeMemory(){
char stack_end;
void *heap_start = malloc(sizeof(uint32_t));
if (heap_start == 0) return 0;
uint32_t result = (uint32_t)&stack_end - (uint32_t)heap_start;
free(heap_start);
return result;
}
// --------------------------------------------------------------------------
// ADC
// --------------------------------------------------------------------------
#define ADC_DONE 0x80000000
#define ADC_OVERRUN 0x40000000
void HAL_adc_init(void) {
LPC_SC->PCONP |= (1 << 12); // Enable CLOCK for internal ADC controller
LPC_SC->PCLKSEL0 &= ~(0x3 << 24);
LPC_SC->PCLKSEL0 |= (0x1 << 24); // 0: 25MHz, 1: 100MHz, 2: 50MHz, 3: 12.5MHZ to ADC clock divider
LPC_ADC->ADCR = (0 << 0) // SEL: 0 = no channels selected
| (0xFF << 8) // select slowest clock for A/D conversion 150 - 190 uS for a complete conversion
| (0 << 16) // BURST: 0 = software control
| (0 << 17) // CLKS: not applicable
| (1 << 21) // PDN: 1 = operational
| (0 << 24) // START: 0 = no start
| (0 << 27); // EDGE: not applicable
}
// externals need to make the call to KILL compile
#include "../../../language.h"
extern void kill(const char*);
extern const char errormagic[];
void HAL_adc_enable_channel(int pin) {
if (pin < 0 || pin >= NUM_ANALOG_INPUTS) {
usb_serial.printf("%sINVALID ANALOG PORT:%d\n", errormagic, pin);
kill(MSG_KILLED);
}
int8_t pin_port = adc_pin_map[pin].port;
int8_t pin_port_pin = adc_pin_map[pin].pin;
int8_t pinsel_start_bit = pin_port_pin > 15 ? 2 * (pin_port_pin - 16) : 2 * pin_port_pin;
uint8_t pin_sel_register = (pin_port == 0 && pin_port_pin <= 15) ? 0 :
(pin_port == 0) ? 1 :
pin_port == 1 ? 3 : 10;
switch (pin_sel_register) {
case 1 :
LPC_PINCON->PINSEL1 &= ~(0x3 << pinsel_start_bit);
LPC_PINCON->PINSEL1 |= (0x1 << pinsel_start_bit);
break;
case 3 :
LPC_PINCON->PINSEL3 &= ~(0x3 << pinsel_start_bit);
LPC_PINCON->PINSEL3 |= (0x3 << pinsel_start_bit);
break;
case 0 :
LPC_PINCON->PINSEL0 &= ~(0x3 << pinsel_start_bit);
LPC_PINCON->PINSEL0 |= (0x2 << pinsel_start_bit);
break;
};
}
void HAL_adc_start_conversion(uint8_t adc_pin) {
if( (adc_pin >= NUM_ANALOG_INPUTS) || (adc_pin_map[adc_pin].port == 0xFF) ) {
usb_serial.printf("HAL: HAL_adc_start_conversion: no pinmap for %d\n",adc_pin);
return;
}
LPC_ADC->ADCR &= ~0xFF; // Reset
LPC_ADC->ADCR |= ( 0x01 << adc_pin_map[adc_pin].adc ); // Select Channel
LPC_ADC->ADCR |= ( 0x01 << 24 ); // start conversion
}
bool HAL_adc_finished(void) {
uint32_t data = LPC_ADC->ADGDR;
return LPC_ADC->ADGDR & ADC_DONE;
}
uint16_t HAL_adc_get_result(void) {
uint32_t data = LPC_ADC->ADGDR;
LPC_ADC->ADCR &= ~(1 << 24); //stop conversion
if ( data & ADC_OVERRUN ) return 0;
return ((data >> 6) & 0x3ff); //10bit
}
#define SBIT_CNTEN 0
#define SBIT_PWMEN 2
#define SBIT_PWMMR0R 1
#define PWM_1 0 //P2_0 (0-1 Bits of PINSEL4)
#define PWM_2 2 //P2_1 (2-3 Bits of PINSEL4)
#define PWM_3 4 //P2_2 (4-5 Bits of PINSEL4)
#define PWM_4 6 //P2_3 (6-7 Bits of PINSEL4)
#define PWM_5 8 //P2_4 (8-9 Bits of PINSEL4)
#define PWM_6 10 //P2_5 (10-11 Bits of PINSEL4)
void HAL_pwm_init(void) {
LPC_PINCON->PINSEL4 = _BV(PWM_5) | _BV(PWM_6);
LPC_PWM1->TCR = _BV(SBIT_CNTEN) | _BV(SBIT_PWMEN);
LPC_PWM1->PR = 0x0; // No prescalar
LPC_PWM1->MCR = _BV(SBIT_PWMMR0R); // Reset on PWMMR0, reset TC if it matches MR0
LPC_PWM1->MR0 = 255; /* set PWM cycle(Ton+Toff)=255) */
LPC_PWM1->MR5 = 0; /* Set 50% Duty Cycle for the channels */
LPC_PWM1->MR6 = 0;
// Trigger the latch Enable Bits to load the new Match Values MR0, MR5, MR6
LPC_PWM1->LER = _BV(0) | _BV(5) | _BV(6);
// Enable the PWM output pins for PWM_5-PWM_6(P2_4 - P2_5)
LPC_PWM1->PCR = _BV(13) | _BV(14);
}
#endif // TARGET_LPC1768