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- /**
- * Marlin 3D Printer Firmware
- *
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
- * Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.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 <https://www.gnu.org/licenses/>.
- *
- */
-
- /**
- * HAL Timers for Arduino Due and compatible (SAM3X8E)
- */
-
- #ifdef ARDUINO_ARCH_SAM
-
- // ------------------------
- // Includes
- // ------------------------
- #include "../../inc/MarlinConfig.h"
- #include "HAL.h"
-
- // ------------------------
- // Local defines
- // ------------------------
-
- #define NUM_HARDWARE_TIMERS 9
-
- // ------------------------
- // Private Variables
- // ------------------------
-
- const tTimerConfig TimerConfig [NUM_HARDWARE_TIMERS] = {
- { TC0, 0, TC0_IRQn, 3}, // 0 - [servo timer5]
- { TC0, 1, TC1_IRQn, 0}, // 1
- { TC0, 2, TC2_IRQn, 2}, // 2 - stepper
- { TC1, 0, TC3_IRQn, 0}, // 3 - stepper for BOARD_ARCHIM1
- { TC1, 1, TC4_IRQn, 15}, // 4 - temperature
- { TC1, 2, TC5_IRQn, 3}, // 5 - [servo timer3]
- { TC2, 0, TC6_IRQn, 14}, // 6 - tone
- { TC2, 1, TC7_IRQn, 0}, // 7
- { TC2, 2, TC8_IRQn, 0}, // 8
- };
-
- // ------------------------
- // Public functions
- // ------------------------
-
- /*
- Timer_clock1: Prescaler 2 -> 42MHz
- Timer_clock2: Prescaler 8 -> 10.5MHz
- Timer_clock3: Prescaler 32 -> 2.625MHz
- Timer_clock4: Prescaler 128 -> 656.25kHz
- */
-
- void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency) {
- Tc *tc = TimerConfig[timer_num].pTimerRegs;
- IRQn_Type irq = TimerConfig[timer_num].IRQ_Id;
- uint32_t channel = TimerConfig[timer_num].channel;
-
- // Disable interrupt, just in case it was already enabled
- NVIC_DisableIRQ(irq);
-
- // 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();
-
- // Disable timer interrupt
- tc->TC_CHANNEL[channel].TC_IDR = TC_IDR_CPCS;
-
- // Stop timer, just in case, to be able to reconfigure it
- TC_Stop(tc, channel);
-
- pmc_set_writeprotect(false);
- pmc_enable_periph_clk((uint32_t)irq);
- NVIC_SetPriority(irq, TimerConfig [timer_num].priority);
-
- // wave mode, reset counter on match with RC,
- TC_Configure(tc, channel, TC_CMR_WAVE | TC_CMR_WAVSEL_UP_RC | TC_CMR_TCCLKS_TIMER_CLOCK1);
-
- // Set compare value
- TC_SetRC(tc, channel, VARIANT_MCK / 2 / frequency);
-
- // And start timer
- TC_Start(tc, channel);
-
- // enable interrupt on RC compare
- tc->TC_CHANNEL[channel].TC_IER = TC_IER_CPCS;
-
- // Finally, enable IRQ
- NVIC_EnableIRQ(irq);
- }
-
- void HAL_timer_enable_interrupt(const uint8_t timer_num) {
- IRQn_Type irq = TimerConfig[timer_num].IRQ_Id;
- NVIC_EnableIRQ(irq);
- }
-
- void HAL_timer_disable_interrupt(const uint8_t timer_num) {
- IRQn_Type irq = TimerConfig[timer_num].IRQ_Id;
- NVIC_DisableIRQ(irq);
-
- // 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();
- }
-
- // missing from CMSIS: Check if interrupt is enabled or not
- static bool NVIC_GetEnabledIRQ(IRQn_Type IRQn) {
- return TEST(NVIC->ISER[uint32_t(IRQn) >> 5], uint32_t(IRQn) & 0x1F);
- }
-
- bool HAL_timer_interrupt_enabled(const uint8_t timer_num) {
- IRQn_Type irq = TimerConfig[timer_num].IRQ_Id;
- return NVIC_GetEnabledIRQ(irq);
- }
-
- #endif // ARDUINO_ARCH_SAM
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