/** * Marlin 3D Printer Firmware * * Copyright (c) 2020 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 . * */ #pragma once /** * HAL For LPC1768 */ #include #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 #ifndef STEP_TIMER_NUM #define STEP_TIMER_NUM 0 // Timer Index for Stepper #endif #ifndef PULSE_TIMER_NUM #define PULSE_TIMER_NUM STEP_TIMER_NUM #endif #ifndef TEMP_TIMER_NUM #define TEMP_TIMER_NUM 1 // Timer Index for Temperature #endif #ifndef PWM_TIMER_NUM #define PWM_TIMER_NUM 3 // Timer Index for PWM #endif #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) #ifndef HAL_STEP_TIMER_ISR #define HAL_STEP_TIMER_ISR() _HAL_TIMER_ISR(STEP_TIMER_NUM) #endif #ifndef HAL_TEMP_TIMER_ISR #define HAL_TEMP_TIMER_ISR() _HAL_TIMER_ISR(TEMP_TIMER_NUM) #endif // Timer references by index #define STEP_TIMER_PTR _HAL_TIMER(STEP_TIMER_NUM) #define TEMP_TIMER_PTR _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_PTR->MR0 = compare; break; // Stepper Timer Match Register 0 case 1: TEMP_TIMER_PTR->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_PTR->MR0; // Stepper Timer Match Register 0 case 1: return TEMP_TIMER_PTR->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_PTR->TC; // Stepper Timer Count case 1: return TEMP_TIMER_PTR->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 TEST(NVIC->ISER[uint32_t(IRQn) >> 5], uint32_t(IRQn) & 0x1F); } 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_PTR->IR, SBIT_CNTEN); break; case 1: SBI(TEMP_TIMER_PTR->IR, SBIT_CNTEN); break; } } #define HAL_timer_isr_epilogue(TIMER_NUM)