From e8701195e66f2d27ffe17fb514eae8173795aaf7 Mon Sep 17 00:00:00 2001
From: Georgiy Bondarenko <69736697+nehilo@users.noreply.github.com>
Date: Thu, 4 Mar 2021 22:54:23 +0500
Subject: Initial commit
---
Marlin/src/HAL/LPC1768/timers.h | 173 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 173 insertions(+)
create mode 100644 Marlin/src/HAL/LPC1768/timers.h
(limited to 'Marlin/src/HAL/LPC1768/timers.h')
diff --git a/Marlin/src/HAL/LPC1768/timers.h b/Marlin/src/HAL/LPC1768/timers.h
new file mode 100644
index 0000000..4b63854
--- /dev/null
+++ b/Marlin/src/HAL/LPC1768/timers.h
@@ -0,0 +1,173 @@
+/**
+ * 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)
--
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