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95 lines
2.6 KiB
95 lines
2.6 KiB
/**
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* Marlin 3D Printer Firmware
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*
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* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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* Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
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* Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
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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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* Description:
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*
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* For TARGET_LPC1768
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*/
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#ifdef TARGET_LPC1768
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#include "../HAL.h"
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#include "HAL_timers.h"
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void HAL_timer_init(void) {
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LPC_SC->PCONP |= (0x1 << 0x1); // power on timer0
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LPC_TIM0->PR = ((HAL_TIMER_RATE / HAL_STEPPER_TIMER_RATE) - 1); // Use prescaler to set frequency if needed
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LPC_SC->PCONP |= (0x1 << 0x2); // power on timer1
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LPC_TIM1->PR = ((HAL_TIMER_RATE / 1000000) - 1);
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}
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void HAL_timer_start(uint8_t timer_num, uint32_t frequency) {
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switch(timer_num) {
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case 0:
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LPC_TIM0->MCR = 3; // Match on MR0, reset on MR0
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LPC_TIM0->MR0 = (uint32_t)(HAL_STEPPER_TIMER_RATE / frequency); // Match value (period) to set frequency
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LPC_TIM0->TCR = (1 << 0); // enable
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break;
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case 1:
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LPC_TIM1->MCR = 3;
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LPC_TIM1->MR0 = (uint32_t)(HAL_TEMP_TIMER_RATE / frequency);;
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LPC_TIM1->TCR = (1 << 0);
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break;
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default:
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return;
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}
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}
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void HAL_timer_enable_interrupt (uint8_t timer_num) {
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switch(timer_num) {
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case 0:
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NVIC_EnableIRQ(TIMER0_IRQn); // Enable interrupt handler
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NVIC_SetPriority(TIMER0_IRQn, NVIC_EncodePriority(0, 1, 0));
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break;
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case 1:
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NVIC_EnableIRQ(TIMER1_IRQn);
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NVIC_SetPriority(TIMER1_IRQn, NVIC_EncodePriority(0, 2, 0));
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break;
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}
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}
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void HAL_timer_disable_interrupt (uint8_t timer_num) {
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switch(timer_num) {
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case 0:
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NVIC_DisableIRQ(TIMER0_IRQn); // disable interrupt handler
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break;
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case 1:
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NVIC_DisableIRQ(TIMER1_IRQn);
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break;
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}
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}
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void HAL_timer_isr_prologue (uint8_t timer_num) {
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switch(timer_num) {
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case 0:
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LPC_TIM0->IR |= 1; //Clear the Interrupt
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break;
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case 1:
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LPC_TIM1->IR |= 1;
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break;
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}
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}
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#endif // TARGET_LPC1768
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