89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2013 Gareth McMullin <gareth@blacksphere.co.nz>
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* Copyright (C) 2015 Daniele Lacamera <root at danielinux.net>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libopencm3/lm3s/usart.h>
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void usart_send(uint32_t usart, uint16_t data)
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{
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USART_DR(usart) = data;
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}
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uint16_t usart_recv(uint32_t usart)
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{
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return USART_DR(usart) & 0xff;
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}
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void usart_send_blocking(uint32_t usart, uint16_t data)
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{
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while (!usart_is_send_ready(usart));
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usart_send(usart, data);
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}
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bool usart_is_recv_ready(uint32_t usart)
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{
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return ((USART_FR(usart) & USART_FR_RXFE) == 0);
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}
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bool usart_is_send_ready(uint32_t usart)
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{
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return ((USART_FR(usart) & USART_FR_BUSY) == 0);
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}
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uint16_t usart_recv_blocking(uint32_t usart)
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{
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while (!usart_is_recv_ready(usart));
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return usart_recv(usart);
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}
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void usart_enable_rx_interrupt(uint32_t usart)
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{
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USART_IM(usart) |= USART_IM_RX;
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}
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void usart_enable_tx_interrupt(uint32_t usart)
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{
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USART_IM(usart) |= USART_IM_TX;
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}
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void usart_disable_rx_interrupt(uint32_t usart)
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{
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USART_IM(usart) &= (~USART_IM_RX);
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}
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void usart_disable_tx_interrupt(uint32_t usart)
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{
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USART_IM(usart) &= (~USART_IM_TX);
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}
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void usart_clear_rx_interrupt(uint32_t usart)
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{
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USART_IC(usart) |= USART_IC_RX;
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}
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void usart_clear_tx_interrupt(uint32_t usart)
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{
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USART_IC(usart) |= USART_IC_TX;
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}
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bool usart_get_interrupt_source(uint32_t usart, uint32_t flag)
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{
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return ((USART_RIS(usart) & flag) != 0);
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}
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