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/TEENSY31_32/timers.h | 113 ++++++++++++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100644 Marlin/src/HAL/TEENSY31_32/timers.h

(limited to 'Marlin/src/HAL/TEENSY31_32/timers.h')

diff --git a/Marlin/src/HAL/TEENSY31_32/timers.h b/Marlin/src/HAL/TEENSY31_32/timers.h
new file mode 100644
index 0000000..61b8673
--- /dev/null
+++ b/Marlin/src/HAL/TEENSY31_32/timers.h
@@ -0,0 +1,113 @@
+/**
+ * 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/>.
+ *
+ */
+#pragma once
+
+/**
+ * HAL Timers for Teensy 3.2 (MK20DX256)
+ */
+
+#include <stdint.h>
+
+// ------------------------
+// Defines
+// ------------------------
+
+#define FORCE_INLINE __attribute__((always_inline)) inline
+
+typedef uint32_t hal_timer_t;
+#define HAL_TIMER_TYPE_MAX 0xFFFFFFFF
+
+#define FTM0_TIMER_PRESCALE 8
+#define FTM1_TIMER_PRESCALE 4
+#define FTM0_TIMER_PRESCALE_BITS 0b011
+#define FTM1_TIMER_PRESCALE_BITS 0b010
+
+#define FTM0_TIMER_RATE (F_BUS / (FTM0_TIMER_PRESCALE)) // 60MHz / 8 = 7500kHz
+#define FTM1_TIMER_RATE (F_BUS / (FTM1_TIMER_PRESCALE)) // 60MHz / 4 = 15MHz
+
+#define HAL_TIMER_RATE         (FTM0_TIMER_RATE)
+
+#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
+
+#define TEMP_TIMER_FREQUENCY    1000
+
+#define STEPPER_TIMER_RATE     HAL_TIMER_RATE
+#define STEPPER_TIMER_TICKS_PER_US ((STEPPER_TIMER_RATE) / 1000000)
+#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() extern "C" void ftm0_isr() //void TC3_Handler()
+#endif
+#ifndef HAL_TEMP_TIMER_ISR
+  #define HAL_TEMP_TIMER_ISR() extern "C" void ftm1_isr() //void TC4_Handler()
+#endif
+
+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: FTM0_C0V = compare; break;
+    case 1: FTM1_C0V = compare; break;
+  }
+}
+
+FORCE_INLINE static hal_timer_t HAL_timer_get_compare(const uint8_t timer_num) {
+  switch (timer_num) {
+    case 0: return FTM0_C0V;
+    case 1: return FTM1_C0V;
+  }
+  return 0;
+}
+
+FORCE_INLINE static hal_timer_t HAL_timer_get_count(const uint8_t timer_num) {
+  switch (timer_num) {
+    case 0: return FTM0_CNT;
+    case 1: return FTM1_CNT;
+  }
+  return 0;
+}
+
+void HAL_timer_enable_interrupt(const uint8_t timer_num);
+void HAL_timer_disable_interrupt(const uint8_t timer_num);
+bool HAL_timer_interrupt_enabled(const uint8_t timer_num);
+
+void HAL_timer_isr_prologue(const uint8_t timer_num);
+#define HAL_timer_isr_epilogue(TIMER_NUM)
-- 
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