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/******************************************************************************
* 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 <mbolivar@leaflabs.com>
* @brief STM32F2 timers.
*/
#include <libmaple/timer.h>
#include "timer_private.h"
/*
* Routines
*/
/**
* @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);
}
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