/****************************************************************************** * The MIT License * * Copyright (c) 2012 LeafLabs, LLC. * * Permission is hereby granted, free of charge, to any person * obtaining a copy of this software and associated documentation * files (the "Software"), to deal in the Software without * restriction, including without limitation the rights to use, copy, * modify, merge, publish, distribute, sublicense, and/or sell copies * of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. *****************************************************************************/ /** * @file libmaple/stm32f2/timer.c * @author Marti Bolivar * @brief STM32F2 timers. */ #include #include "timer_private.h" /* * Devices * * Defer to the timer_private API for declaring these. */ static timer_dev timer1 = ADVANCED_TIMER(1); static timer_dev timer2 = GENERAL_TIMER(2); static timer_dev timer3 = GENERAL_TIMER(3); static timer_dev timer4 = GENERAL_TIMER(4); static timer_dev timer5 = GENERAL_TIMER(5); static timer_dev timer6 = BASIC_TIMER(6); static timer_dev timer7 = BASIC_TIMER(7); static timer_dev timer8 = ADVANCED_TIMER(8); /* TIM9 has UIE, CC1IE, CC2IE, TIE bits in DIER. */ static timer_dev timer9 = RESTRICTED_GENERAL_TIMER(9, TIMER_DIER_TIE_BIT); /* TIM10 has UIE, CC1IE. */ static timer_dev timer10 = RESTRICTED_GENERAL_TIMER(10, TIMER_DIER_CC1IE_BIT); /* TIM11 has UIE, CC1IE. */ static timer_dev timer11 = RESTRICTED_GENERAL_TIMER(11, TIMER_DIER_CC1IE_BIT); /* TIM12 has UIE, CC1IE, CC2IE, TIE. */ static timer_dev timer12 = RESTRICTED_GENERAL_TIMER(12, TIMER_DIER_TIE_BIT); /* TIM13 has UIE, CC1IE. */ static timer_dev timer13 = RESTRICTED_GENERAL_TIMER(13, TIMER_DIER_CC1IE_BIT); /* TIM14 has UIE, CC1IE. */ static timer_dev timer14 = RESTRICTED_GENERAL_TIMER(14, TIMER_DIER_CC1IE_BIT); /** Timer 1 device (advanced) */ timer_dev *TIMER1 = &timer1; /** Timer 2 device (general-purpose) */ timer_dev *TIMER2 = &timer2; /** Timer 3 device (general-purpose) */ timer_dev *TIMER3 = &timer3; /** Timer 4 device (general-purpose) */ timer_dev *TIMER4 = &timer4; /** Timer 5 device (general-purpose) */ timer_dev *TIMER5 = &timer5; /** Timer 6 device (basic) */ timer_dev *TIMER6 = &timer6; /** Timer 7 device (basic) */ timer_dev *TIMER7 = &timer7; /** Timer 8 device (advanced) */ timer_dev *TIMER8 = &timer8; /** Timer 9 device (general-purpose) */ timer_dev *TIMER9 = &timer9; /** Timer 10 device (general-purpose) */ timer_dev *TIMER10 = &timer10; /** Timer 11 device (general-purpose) */ timer_dev *TIMER11 = &timer11; /** Timer 12 device (general-purpose) */ timer_dev *TIMER12 = &timer12; /** Timer 13 device (general-purpose) */ timer_dev *TIMER13 = &timer13; /** Timer 14 device (general-purpose) */ timer_dev *TIMER14 = &timer14; /* * Routines */ /** * @brief Call a function on timer devices. * @param fn Function to call on each timer device. */ void timer_foreach(void (*fn)(timer_dev*)) { fn(TIMER1); fn(TIMER2); fn(TIMER3); fn(TIMER4); fn(TIMER5); fn(TIMER6); fn(TIMER7); fn(TIMER8); fn(TIMER9); fn(TIMER10); fn(TIMER11); fn(TIMER12); fn(TIMER13); fn(TIMER14); } /** * @brief Get the GPIO alternate function corresponding to a timer. * * For example, if dev is TIMER1, this function returns * GPIO_AF_TIM_1_2. This is useful for e.g. using gpio_set_af() to set * a pin's alternate function to a timer. * * @param dev Timer device, must not be TIMER6 or TIMER7. * @return gpio_af corresponding to dev * @see gpio_set_af * @see gpio_af */ gpio_af timer_get_af(timer_dev *dev) { rcc_clk_id clk_id = dev->clk_id; /* Timers 6 and 7 don't have any capture/compare, so they can't do * PWM (and in fact have no AF values). */ ASSERT(clk_id != RCC_TIMER6 && clk_id != RCC_TIMER7); switch(dev->clk_id) { case RCC_TIMER1: // fall-through case RCC_TIMER2: return GPIO_AF_TIM_1_2; case RCC_TIMER3: // fall-through case RCC_TIMER4: // ... case RCC_TIMER5: return GPIO_AF_TIM_3_4_5; case RCC_TIMER8: // fall-through case RCC_TIMER9: // ... case RCC_TIMER10: // ... case RCC_TIMER11: return GPIO_AF_TIM_8_9_10_11; case RCC_TIMER12: // fall-through case RCC_TIMER13: // ... case RCC_TIMER14: return GPIO_AF_CAN_1_2_TIM_12_13_14; default: ASSERT(0); // Can't happen return (gpio_af)-1; } } /* * IRQ handlers * * Defer to the timer_private dispatch API. */ void __irq_tim1_brk_tim9(void) { dispatch_adv_brk(TIMER1); dispatch_tim_9_12(TIMER9); } void __irq_tim1_up_tim10(void) { dispatch_adv_up(TIMER1); dispatch_tim_10_11_13_14(TIMER10); } void __irq_tim1_trg_com_tim11(void) { dispatch_adv_trg_com(TIMER1); dispatch_tim_10_11_13_14(TIMER11); } void __irq_tim1_cc(void) { dispatch_adv_cc(TIMER1); } void __irq_tim2(void) { dispatch_general(TIMER2); } void __irq_tim3(void) { dispatch_general(TIMER3); } void __irq_tim4(void) { dispatch_general(TIMER4); } void __irq_tim5(void) { dispatch_general(TIMER5); } /* FIXME: this is also the DAC DMA underrun interrupt, so it needs a * different name (and to be supported?). */ void __irq_tim6(void) { dispatch_basic(TIMER6); } void __irq_tim7(void) { dispatch_basic(TIMER7); } void __irq_tim8_brk_tim12(void) { dispatch_adv_brk(TIMER8); dispatch_tim_9_12(TIMER12); } void __irq_tim8_up_tim13(void) { dispatch_adv_up(TIMER8); dispatch_tim_10_11_13_14(TIMER13); } void __irq_tim8_trg_com_tim14(void) { dispatch_adv_trg_com(TIMER8); dispatch_tim_10_11_13_14(TIMER14); } void __irq_tim8_cc(void) { dispatch_adv_cc(TIMER8); }