#ifndef ucoo_hal_timer_timer_stm32_tcc #define ucoo_hal_timer_timer_stm32_tcc // ucoolib - Microcontroller object oriented library. {{{ // // Copyright (C) 2015 Nicolas Schodet // // 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. // // }}} #include #include namespace ucoo { template struct TimerHardware { }; template<> struct TimerHardware { static const enum rcc_periph_clken clken = RCC_TIM2; // TODO timer uses a double frequency only if APB prescaler is not 1. static int freq () { return 2 * rcc_apb1_frequency; } }; template TimerHard::~TimerHard () { disable (); } template void TimerHard::enable (int freq) { rcc_periph_clock_enable (TimerHardware::clken); int in_freq = TimerHardware::freq (); int div = in_freq / freq; assert (div <= 0x10000 && in_freq / div == freq); TIM_CR1 (Base) = 0; TIM_PSC (Base) = div - 1; TIM_ARR (Base) = 0xffffffff; TIM_EGR (Base) = TIM_EGR_UG; TIM_CR1 (Base) = TIM_CR1_CEN; } template void TimerHard::disable () { TIM_CR1 (Base) = 0; rcc_periph_clock_disable (TimerHardware::clken); } template uint32_t TimerHard::get_value () { return TIM_CNT (Base); } } // namespace ucoo #endif // ucoo_hal_timer_timer_stm32_tcc