lora-car/libopencm3/lib/stm32/common/usart_common_fifos.c

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/*
* This file is part of the libopencm3 project.
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libopencm3/stm32/usart.h>
void usart_enable_fifos(uint32_t usart) {
USART_CR1(usart) |= USART_CR1_FIFOEN;
}
void usart_disable_fifos(uint32_t usart) {
USART_CR1(usart) &= ~USART_CR1_FIFOEN;
}
void usart_enable_tx_fifo_empty_interrupt(uint32_t usart) {
USART_CR1(usart) |= USART_CR1_TXFEIE;
}
void usart_disable_tx_fifo_empty_interrupt(uint32_t usart) {
USART_CR1(usart) &= ~USART_CR1_TXFEIE;
}
void usart_enable_tx_fifo_threshold_interrupt(uint32_t usart) {
USART_CR3(usart) |= USART_CR3_TXFTIE;
}
void usart_disable_tx_fifo_threshold_interrupt(uint32_t usart) {
USART_CR3(usart) &= ~USART_CR3_TXFTIE;
}
void usart_set_tx_fifo_threshold(uint32_t usart,
usart_fifo_threshold_t threshold) {
uint32_t cr3 = USART_CR3(usart) &
~(USART_FIFO_THRESH_MASK << USART_CR3_TXFTCFG_SHIFT);
USART_CR3(usart) = cr3 | (threshold << USART_CR3_TXFTCFG_SHIFT);
}
void usart_enable_rx_fifo_full_interrupt(uint32_t usart) {
USART_CR1(usart) |= USART_CR1_RXFFIE;
}
void usart_disable_rx_fifo_full_interrupt(uint32_t usart) {
USART_CR1(usart) &= ~USART_CR1_RXFFIE;
}
void usart_enable_rx_fifo_threshold_interrupt(uint32_t usart) {
USART_CR3(usart) |= USART_CR3_RXFTIE;
}
void usart_disable_rx_fifo_threshold_interrupt(uint32_t usart) {
USART_CR3(usart) &= ~USART_CR3_RXFTIE;
}
void usart_set_rx_fifo_threshold(uint32_t usart,
usart_fifo_threshold_t threshold) {
uint32_t cr3 = USART_CR3(usart) &
~(USART_FIFO_THRESH_MASK << USART_CR3_RXFTCFG_SHIFT);
USART_CR3(usart) = cr3 | (threshold << USART_CR3_RXFTCFG_SHIFT);
}