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114 lines
3.7 KiB
114 lines
3.7 KiB
/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2020 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 <https://www.gnu.org/licenses/>.
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*
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*/
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/**
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* Teensy4.0/4.1 (__IMXRT1062__)
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*/
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#ifdef __IMXRT1062__
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#include "../../inc/MarlinConfig.h"
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void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency) {
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switch (timer_num) {
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case 0:
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CCM_CSCMR1 &= ~CCM_CSCMR1_PERCLK_CLK_SEL; // turn off 24mhz mode
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CCM_CCGR1 |= CCM_CCGR1_GPT1_BUS(CCM_CCGR_ON);
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GPT1_CR = 0; // disable timer
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GPT1_SR = 0x3F; // clear all prior status
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GPT1_PR = GPT1_TIMER_PRESCALE - 1;
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GPT1_CR |= GPT_CR_CLKSRC(1); //clock selection #1 (peripheral clock = 150 MHz)
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GPT1_CR |= GPT_CR_ENMOD; //reset count to zero before enabling
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GPT1_CR |= GPT_CR_OM1(1); // toggle mode
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GPT1_OCR1 = (GPT1_TIMER_RATE / frequency) -1; // Initial compare value
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GPT1_IR = GPT_IR_OF1IE; // Compare3 value
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GPT1_CR |= GPT_CR_EN; //enable GPT2 counting at 150 MHz
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OUT_WRITE(15, HIGH);
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attachInterruptVector(IRQ_GPT1, &stepTC_Handler);
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NVIC_SET_PRIORITY(IRQ_GPT1, 16);
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break;
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case 1:
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CCM_CSCMR1 &= ~CCM_CSCMR1_PERCLK_CLK_SEL; // turn off 24mhz mode
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CCM_CCGR0 |= CCM_CCGR0_GPT2_BUS(CCM_CCGR_ON);
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GPT2_CR = 0; // disable timer
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GPT2_SR = 0x3F; // clear all prior status
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GPT2_PR = GPT2_TIMER_PRESCALE - 1;
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GPT2_CR |= GPT_CR_CLKSRC(1); //clock selection #1 (peripheral clock = 150 MHz)
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GPT2_CR |= GPT_CR_ENMOD; //reset count to zero before enabling
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GPT2_CR |= GPT_CR_OM1(1); // toggle mode
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GPT2_OCR1 = (GPT2_TIMER_RATE / frequency) -1; // Initial compare value
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GPT2_IR = GPT_IR_OF1IE; // Compare3 value
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GPT2_CR |= GPT_CR_EN; //enable GPT2 counting at 150 MHz
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OUT_WRITE(14, HIGH);
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attachInterruptVector(IRQ_GPT2, &tempTC_Handler);
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NVIC_SET_PRIORITY(IRQ_GPT2, 32);
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break;
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}
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}
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void HAL_timer_enable_interrupt(const uint8_t timer_num) {
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switch (timer_num) {
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case 0:
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NVIC_ENABLE_IRQ(IRQ_GPT1);
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break;
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case 1:
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NVIC_ENABLE_IRQ(IRQ_GPT2);
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break;
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}
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}
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void HAL_timer_disable_interrupt(const uint8_t timer_num) {
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switch (timer_num) {
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case 0: NVIC_DISABLE_IRQ(IRQ_GPT1); break;
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case 1: NVIC_DISABLE_IRQ(IRQ_GPT2); break;
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}
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// We NEED memory barriers to ensure Interrupts are actually disabled!
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// ( https://dzone.com/articles/nvic-disabling-interrupts-on-arm-cortex-m-and-the )
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asm volatile("dsb");
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}
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bool HAL_timer_interrupt_enabled(const uint8_t timer_num) {
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switch (timer_num) {
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case 0: return (NVIC_IS_ENABLED(IRQ_GPT1));
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case 1: return (NVIC_IS_ENABLED(IRQ_GPT2));
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}
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return false;
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}
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void HAL_timer_isr_prologue(const uint8_t timer_num) {
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switch (timer_num) {
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case 0:
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GPT1_SR = GPT_IR_OF1IE; // clear OF3 bit
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break;
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case 1:
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GPT2_SR = GPT_IR_OF1IE; // clear OF3 bit
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break;
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}
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asm volatile("dsb");
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}
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#endif // __IMXRT1062__
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