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/**
* Marlin 3D Printer Firmware
* Copyright (c) 2020 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 <https://www.gnu.org/licenses/>.
*
*/
/**
* HAL Timers for Teensy 4.0 (IMXRT1062DVL6A) / 4.1 (IMXRT1062DVJ6A)
*/
#ifdef __IMXRT1062__
#include "../../inc/MarlinConfig.h"
void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency) {
switch (timer_num) {
case 0:
CCM_CSCMR1 &= ~CCM_CSCMR1_PERCLK_CLK_SEL; // turn off 24mhz mode
CCM_CCGR1 |= CCM_CCGR1_GPT1_BUS(CCM_CCGR_ON);
GPT1_CR = 0; // disable timer
GPT1_SR = 0x3F; // clear all prior status
GPT1_PR = GPT1_TIMER_PRESCALE - 1;
GPT1_CR |= GPT_CR_CLKSRC(1); //clock selection #1 (peripheral clock = 150 MHz)
GPT1_CR |= GPT_CR_ENMOD; //reset count to zero before enabling
GPT1_CR |= GPT_CR_OM1(1); // toggle mode
GPT1_OCR1 = (GPT1_TIMER_RATE / frequency) -1; // Initial compare value
GPT1_IR = GPT_IR_OF1IE; // Compare3 value
GPT1_CR |= GPT_CR_EN; //enable GPT2 counting at 150 MHz
OUT_WRITE(15, HIGH);
attachInterruptVector(IRQ_GPT1, &stepTC_Handler);
NVIC_SET_PRIORITY(IRQ_GPT1, 16);
break;
case 1:
CCM_CSCMR1 &= ~CCM_CSCMR1_PERCLK_CLK_SEL; // turn off 24mhz mode
CCM_CCGR0 |= CCM_CCGR0_GPT2_BUS(CCM_CCGR_ON);
GPT2_CR = 0; // disable timer
GPT2_SR = 0x3F; // clear all prior status
GPT2_PR = GPT2_TIMER_PRESCALE - 1;
GPT2_CR |= GPT_CR_CLKSRC(1); //clock selection #1 (peripheral clock = 150 MHz)
GPT2_CR |= GPT_CR_ENMOD; //reset count to zero before enabling
GPT2_CR |= GPT_CR_OM1(1); // toggle mode
GPT2_OCR1 = (GPT2_TIMER_RATE / frequency) -1; // Initial compare value
GPT2_IR = GPT_IR_OF1IE; // Compare3 value
GPT2_CR |= GPT_CR_EN; //enable GPT2 counting at 150 MHz
OUT_WRITE(14, HIGH);
attachInterruptVector(IRQ_GPT2, &tempTC_Handler);
NVIC_SET_PRIORITY(IRQ_GPT2, 32);
break;
}
}
void HAL_timer_enable_interrupt(const uint8_t timer_num) {
switch (timer_num) {
case 0:
NVIC_ENABLE_IRQ(IRQ_GPT1);
break;
case 1:
NVIC_ENABLE_IRQ(IRQ_GPT2);
break;
}
}
void HAL_timer_disable_interrupt(const uint8_t timer_num) {
switch (timer_num) {
case 0: NVIC_DISABLE_IRQ(IRQ_GPT1); break;
case 1: NVIC_DISABLE_IRQ(IRQ_GPT2); break;
}
// We NEED memory barriers to ensure Interrupts are actually disabled!
// ( https://dzone.com/articles/nvic-disabling-interrupts-on-arm-cortex-m-and-the )
asm volatile("dsb");
}
bool HAL_timer_interrupt_enabled(const uint8_t timer_num) {
switch (timer_num) {
case 0: return (NVIC_IS_ENABLED(IRQ_GPT1));
case 1: return (NVIC_IS_ENABLED(IRQ_GPT2));
}
return false;
}
void HAL_timer_isr_prologue(const uint8_t timer_num) {
switch (timer_num) {
case 0:
GPT1_SR = GPT_IR_OF1IE; // clear OF3 bit
break;
case 1:
GPT2_SR = GPT_IR_OF1IE; // clear OF3 bit
break;
}
asm volatile("dsb");
}
#endif // __IMXRT1062__
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