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- /**
- * Marlin 3D Printer Firmware
- *
- * Copyright (c) 2019 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/>.
- *
- */
- #pragma once
-
- /**
- *
- * HAL For LPC1768
- */
-
- #include <stdint.h>
-
- #include "../../core/macros.h"
-
- #define SBIT_TIMER0 1
- #define SBIT_TIMER1 2
-
- #define SBIT_CNTEN 0
-
- #define SBIT_MR0I 0 // Timer 0 Interrupt when TC matches MR0
- #define SBIT_MR0R 1 // Timer 0 Reset TC on Match
- #define SBIT_MR0S 2 // Timer 0 Stop TC and PC on Match
- #define SBIT_MR1I 3
- #define SBIT_MR1R 4
- #define SBIT_MR1S 5
- #define SBIT_MR2I 6
- #define SBIT_MR2R 7
- #define SBIT_MR2S 8
- #define SBIT_MR3I 9
- #define SBIT_MR3R 10
- #define SBIT_MR3S 11
-
- // ------------------------
- // Defines
- // ------------------------
-
- #define _HAL_TIMER(T) _CAT(LPC_TIM, T)
- #define _HAL_TIMER_IRQ(T) TIMER##T##_IRQn
- #define __HAL_TIMER_ISR(T) extern "C" void TIMER##T##_IRQHandler()
- #define _HAL_TIMER_ISR(T) __HAL_TIMER_ISR(T)
-
- typedef uint32_t hal_timer_t;
- #define HAL_TIMER_TYPE_MAX 0xFFFFFFFF
-
- #define HAL_TIMER_RATE ((F_CPU) / 4) // frequency of timers peripherals
-
- #define STEP_TIMER_NUM 0 // Timer Index for Stepper
- #define TEMP_TIMER_NUM 1 // Timer Index for Temperature
- #define PULSE_TIMER_NUM STEP_TIMER_NUM
- #define PWM_TIMER_NUM 3 // Timer Index for PWM
-
- #define TEMP_TIMER_RATE 1000000
- #define TEMP_TIMER_FREQUENCY 1000 // temperature interrupt frequency
-
- #define STEPPER_TIMER_RATE HAL_TIMER_RATE // frequency of stepper timer (HAL_TIMER_RATE / STEPPER_TIMER_PRESCALE)
- #define STEPPER_TIMER_TICKS_PER_US ((STEPPER_TIMER_RATE) / 1000000) // stepper timer ticks per µs
- #define STEPPER_TIMER_PRESCALE (CYCLES_PER_MICROSECOND / STEPPER_TIMER_TICKS_PER_US)
-
- #define PULSE_TIMER_RATE STEPPER_TIMER_RATE // frequency of pulse timer
- #define PULSE_TIMER_PRESCALE STEPPER_TIMER_PRESCALE
- #define PULSE_TIMER_TICKS_PER_US STEPPER_TIMER_TICKS_PER_US
-
- #define ENABLE_STEPPER_DRIVER_INTERRUPT() HAL_timer_enable_interrupt(STEP_TIMER_NUM)
- #define DISABLE_STEPPER_DRIVER_INTERRUPT() HAL_timer_disable_interrupt(STEP_TIMER_NUM)
- #define STEPPER_ISR_ENABLED() HAL_timer_interrupt_enabled(STEP_TIMER_NUM)
-
- #define ENABLE_TEMPERATURE_INTERRUPT() HAL_timer_enable_interrupt(TEMP_TIMER_NUM)
- #define DISABLE_TEMPERATURE_INTERRUPT() HAL_timer_disable_interrupt(TEMP_TIMER_NUM)
-
- #define HAL_STEP_TIMER_ISR() _HAL_TIMER_ISR(STEP_TIMER_NUM)
- #define HAL_TEMP_TIMER_ISR() _HAL_TIMER_ISR(TEMP_TIMER_NUM)
-
- // Timer references by index
- #define STEP_TIMER _HAL_TIMER(STEP_TIMER_NUM)
- #define TEMP_TIMER _HAL_TIMER(TEMP_TIMER_NUM)
-
- // ------------------------
- // Public functions
- // ------------------------
- void HAL_timer_init();
- void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency);
-
- FORCE_INLINE static void HAL_timer_set_compare(const uint8_t timer_num, const hal_timer_t compare) {
- switch (timer_num) {
- case 0: STEP_TIMER->MR0 = compare; break; // Stepper Timer Match Register 0
- case 1: TEMP_TIMER->MR0 = compare; break; // Temp Timer Match Register 0
- }
- }
-
- FORCE_INLINE static hal_timer_t HAL_timer_get_compare(const uint8_t timer_num) {
- switch (timer_num) {
- case 0: return STEP_TIMER->MR0; // Stepper Timer Match Register 0
- case 1: return TEMP_TIMER->MR0; // Temp Timer Match Register 0
- }
- return 0;
- }
-
- FORCE_INLINE static hal_timer_t HAL_timer_get_count(const uint8_t timer_num) {
- switch (timer_num) {
- case 0: return STEP_TIMER->TC; // Stepper Timer Count
- case 1: return TEMP_TIMER->TC; // Temp Timer Count
- }
- return 0;
- }
-
- FORCE_INLINE static void HAL_timer_enable_interrupt(const uint8_t timer_num) {
- switch (timer_num) {
- case 0: NVIC_EnableIRQ(TIMER0_IRQn); break; // Enable interrupt handler
- case 1: NVIC_EnableIRQ(TIMER1_IRQn); break; // Enable interrupt handler
- }
- }
-
- FORCE_INLINE static void HAL_timer_disable_interrupt(const uint8_t timer_num) {
- switch (timer_num) {
- case 0: NVIC_DisableIRQ(TIMER0_IRQn); break; // Disable interrupt handler
- case 1: NVIC_DisableIRQ(TIMER1_IRQn); break; // Disable interrupt handler
- }
-
- // We NEED memory barriers to ensure Interrupts are actually disabled!
- // ( https://dzone.com/articles/nvic-disabling-interrupts-on-arm-cortex-m-and-the )
- __DSB();
- __ISB();
- }
-
- // This function is missing from CMSIS
- FORCE_INLINE static bool NVIC_GetEnableIRQ(IRQn_Type IRQn) {
- return (NVIC->ISER[((uint32_t)IRQn) >> 5] & (1 << ((uint32_t)IRQn) & 0x1F)) != 0;
- }
-
- FORCE_INLINE static bool HAL_timer_interrupt_enabled(const uint8_t timer_num) {
- switch (timer_num) {
- case 0: return NVIC_GetEnableIRQ(TIMER0_IRQn); // Check if interrupt is enabled or not
- case 1: return NVIC_GetEnableIRQ(TIMER1_IRQn); // Check if interrupt is enabled or not
- }
- return false;
- }
-
- FORCE_INLINE static void HAL_timer_isr_prologue(const uint8_t timer_num) {
- switch (timer_num) {
- case 0: SBI(STEP_TIMER->IR, SBIT_CNTEN); break;
- case 1: SBI(TEMP_TIMER->IR, SBIT_CNTEN); break;
- }
- }
-
- #define HAL_timer_isr_epilogue(TIMER_NUM)
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