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/*
* This file is part of the libopencm3_cpp_extensions project.
* hosted at http://github.com/thirdpin/libopencm3_cpp_extensions
*
* Copyright (C) 2016 Third Pin LLC
* Written by Anastasiia Lazareva <a.lazareva@thirdpin.ru>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
USART C++ Wrapper of libopencm3 library for STM32F2, STM32F4
*/
#include "cm3cpp_usart.h"
namespace cm3cpp {
namespace usart {
Usart::Usart(LowLevelConfig config, Settings settings)
{
init(config, settings);
}
void Usart::init(LowLevelConfig config, Settings settings)
{
_mode = settings.mode;
switch (config.usart_number) {
case 1:
_usart = USART1;
_usart_nvic = NVIC_USART1_IRQ;
break;
case 2:
_usart = USART2;
_usart_nvic = NVIC_USART2_IRQ;
break;
case 3:
_usart = USART3;
_usart_nvic = NVIC_USART3_IRQ;
break;
case 4:
_usart = UART4;
_usart_nvic = NVIC_UART4_IRQ;
break;
case 5:
_usart = UART5;
_usart_nvic = NVIC_UART5_IRQ;
break;
case 6:
_usart = USART6;
_usart_nvic = NVIC_USART6_IRQ;
break;
}
set_settings(settings);
usart_enable(_usart);
if (_mode == Mode::RX or _mode == Mode::RX_TX) {
_rx.init(config.rx);
if ((config.usart_number >= 1) && (config.usart_number <= 3))
_rx.set_af(Gpio::AltFuncNumber::AF7);
else
_rx.set_af(Gpio::AltFuncNumber::AF8);
_rx.mode_setup(Gpio::Mode::ALTERNATE_FUNCTION, Gpio::PullMode::NO_PULL);
_rx.set_output_options(Gpio::OutputType::PUSH_PULL,
Gpio::Speed::MEDIUM_25MHz);
}
if (_mode == Mode::TX or _mode == Mode::RX_TX) {
_tx.init(config.tx);
if ((config.usart_number >= 1) && (config.usart_number <= 3))
_tx.set_af(Gpio::AltFuncNumber::AF7);
else
_tx.set_af(Gpio::AltFuncNumber::AF8);
_tx.mode_setup(Gpio::Mode::ALTERNATE_FUNCTION, Gpio::PullMode::NO_PULL);
_tx.set_output_options(Gpio::OutputType::PUSH_PULL,
Gpio::Speed::MEDIUM_25MHz);
}
nvic_set_priority(_usart_nvic, config.nvic_priority);
nvic_enable_irq(_usart_nvic);
}
void Usart::deinit()
{
usart_disable(_usart);
nvic_disable_irq(_usart_nvic);
if (_mode == Mode::RX or _mode == Mode::RX_TX)
_rx.mode_setup(Gpio::Mode::INPUT, Gpio::PullMode::NO_PULL);
if (_mode == Mode::TX or _mode == Mode::RX_TX)
_tx.mode_setup(Gpio::Mode::INPUT, Gpio::PullMode::NO_PULL);
}
void Usart::set_settings(Settings settings)
{
_mode = settings.mode;
usart_set_baudrate(_usart, settings.baud_rate);
usart_set_databits(_usart, settings.word_length);
usart_set_stopbits(_usart, settings.stop_bits);
usart_set_mode(_usart, settings.mode);
usart_set_parity(_usart, settings.parity);
usart_set_flow_control(_usart, settings.flow_control);
}
} // namespace usart
} // namespace cm3cpp
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