89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
|
/*
|
||
|
|
* This file is part of the libopencm3 project.
|
||
|
|
*
|
||
|
|
* Copyright (C) 2013 Gareth McMullin <gareth@blacksphere.co.nz>
|
||
|
|
* Copyright (C) 2015 Daniele Lacamera <root at danielinux.net>
|
||
|
|
*
|
||
|
|
* 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/lm3s/usart.h>
|
||
|
|
|
||
|
|
void usart_send(uint32_t usart, uint16_t data)
|
||
|
|
{
|
||
|
|
USART_DR(usart) = data;
|
||
|
|
}
|
||
|
|
|
||
|
|
uint16_t usart_recv(uint32_t usart)
|
||
|
|
{
|
||
|
|
return USART_DR(usart) & 0xff;
|
||
|
|
}
|
||
|
|
|
||
|
|
void usart_send_blocking(uint32_t usart, uint16_t data)
|
||
|
|
{
|
||
|
|
while (!usart_is_send_ready(usart));
|
||
|
|
usart_send(usart, data);
|
||
|
|
}
|
||
|
|
|
||
|
|
bool usart_is_recv_ready(uint32_t usart)
|
||
|
|
{
|
||
|
|
return ((USART_FR(usart) & USART_FR_RXFE) == 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
bool usart_is_send_ready(uint32_t usart)
|
||
|
|
{
|
||
|
|
return ((USART_FR(usart) & USART_FR_BUSY) == 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
uint16_t usart_recv_blocking(uint32_t usart)
|
||
|
|
{
|
||
|
|
while (!usart_is_recv_ready(usart));
|
||
|
|
return usart_recv(usart);
|
||
|
|
}
|
||
|
|
|
||
|
|
void usart_enable_rx_interrupt(uint32_t usart)
|
||
|
|
{
|
||
|
|
USART_IM(usart) |= USART_IM_RX;
|
||
|
|
}
|
||
|
|
|
||
|
|
void usart_enable_tx_interrupt(uint32_t usart)
|
||
|
|
{
|
||
|
|
USART_IM(usart) |= USART_IM_TX;
|
||
|
|
}
|
||
|
|
|
||
|
|
void usart_disable_rx_interrupt(uint32_t usart)
|
||
|
|
{
|
||
|
|
USART_IM(usart) &= (~USART_IM_RX);
|
||
|
|
}
|
||
|
|
|
||
|
|
void usart_disable_tx_interrupt(uint32_t usart)
|
||
|
|
{
|
||
|
|
USART_IM(usart) &= (~USART_IM_TX);
|
||
|
|
}
|
||
|
|
|
||
|
|
void usart_clear_rx_interrupt(uint32_t usart)
|
||
|
|
{
|
||
|
|
USART_IC(usart) |= USART_IC_RX;
|
||
|
|
}
|
||
|
|
|
||
|
|
void usart_clear_tx_interrupt(uint32_t usart)
|
||
|
|
{
|
||
|
|
USART_IC(usart) |= USART_IC_TX;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool usart_get_interrupt_source(uint32_t usart, uint32_t flag)
|
||
|
|
{
|
||
|
|
return ((USART_RIS(usart) & flag) != 0);
|
||
|
|
}
|