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