// ucoolib - Microcontroller object oriented library. {{{ // // Copyright (C) 2013 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 "adc_hard.stm32f4.hh" #include #include namespace ucoo { static const enum rcc_periph_clken adc_clken[] = { RCC_ADC1, RCC_ADC2, RCC_ADC3 }; AdcHard::AdcHard (int n) : n_ (n) { static const uint32_t bases[] = { ADC1, ADC2, ADC3 }; assert (n < (int) lengthof (bases)); base_ = bases[n]; } AdcHard::~AdcHard () { disable (); } void AdcHard::enable () { rcc_periph_clock_enable (adc_clken[n_]); ADC_CR2 (base_) = ADC_CR2_ADON; } void AdcHard::disable () { ADC_CR2 (base_) = 0; rcc_periph_clock_disable (adc_clken[n_]); } int AdcHard::read (int channel) { ADC_SQR3 (base_) = channel; ADC_CR2 (base_) |= ADC_CR2_SWSTART; while (!(ADC_SR (base_) & ADC_SR_EOC)) yield (); ADC_SR (base_) = ~ADC_SR_EOC; return ADC_DR (base_); } } // namespace ucoo