lora-car/libopencm3/lib/lm3s/usart.c
Arti Zirk 054740c5de git subrepo clone https://github.com/libopencm3/libopencm3.git
subrepo:
  subdir:   "libopencm3"
  merged:   "88e91c9a7cce"
upstream:
  origin:   "https://github.com/libopencm3/libopencm3.git"
  branch:   "master"
  commit:   "88e91c9a7cce"
git-subrepo:
  version:  "0.4.3"
  origin:   "???"
  commit:   "???"
2023-01-21 21:54:42 +02:00

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);
}