127 lines
3.1 KiB
C
127 lines
3.1 KiB
C
/*
|
|
* This file is part of the libopencm3 project.
|
|
*
|
|
* Copyright (C) 2013 Gareth McMullin <gareth@blacksphere.co.nz>
|
|
*
|
|
* 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/sam/usart.h>
|
|
|
|
void usart_set_databits(uint32_t usart, int bits)
|
|
{
|
|
USART_MR(usart) = (USART_MR(usart) & ~USART_MR_CHRL_MASK) |
|
|
((bits - 5) << 6);
|
|
}
|
|
|
|
void usart_set_stopbits(uint32_t usart, enum usart_stopbits sb)
|
|
{
|
|
USART_MR(usart) = (USART_MR(usart) & ~USART_MR_NBSTOP_MASK) |
|
|
(sb << 12);
|
|
}
|
|
|
|
void usart_set_parity(uint32_t usart, enum usart_parity par)
|
|
{
|
|
USART_MR(usart) = (USART_MR(usart) & ~USART_MR_PAR_MASK) | (par << 9);
|
|
}
|
|
|
|
void usart_set_mode(uint32_t usart, enum usart_mode mode)
|
|
{
|
|
USART_CR(usart) =
|
|
(mode & USART_MODE_RX) ? USART_CR_RXEN : USART_CR_RXDIS;
|
|
USART_CR(usart) = (mode & USART_MODE_TX) ? USART_CR_TXEN
|
|
: USART_CR_TXDIS;
|
|
}
|
|
|
|
void usart_set_flow_control(uint32_t usart, enum usart_flowcontrol fc)
|
|
{
|
|
USART_MR(usart) = (USART_MR(usart) & ~USART_MR_MODE_MASK) |
|
|
(fc ? USART_MR_MODE_HW_HANDSHAKING : 0);
|
|
}
|
|
|
|
void usart_enable(uint32_t usart)
|
|
{
|
|
USART_CR(usart) = USART_CR_TXEN | USART_CR_RXEN;
|
|
}
|
|
|
|
void usart_disable(uint32_t usart)
|
|
{
|
|
USART_CR(usart) = USART_CR_TXDIS | USART_CR_RXDIS;
|
|
}
|
|
|
|
void usart_send(uint32_t usart, uint16_t data)
|
|
{
|
|
USART_THR(usart) = data;
|
|
}
|
|
|
|
uint16_t usart_recv(uint32_t usart)
|
|
{
|
|
return USART_RHR(usart) & 0x1f;
|
|
}
|
|
|
|
void usart_wait_send_ready(uint32_t usart)
|
|
{
|
|
while ((USART_CSR(usart) & USART_CSR_TXRDY) == 0);
|
|
}
|
|
|
|
void usart_wait_recv_ready(uint32_t usart)
|
|
{
|
|
while ((USART_CSR(usart) & USART_CSR_RXRDY) == 0);
|
|
}
|
|
|
|
void usart_send_blocking(uint32_t usart, uint16_t data)
|
|
{
|
|
usart_wait_send_ready(usart);
|
|
usart_send(usart, data);
|
|
}
|
|
|
|
uint16_t usart_recv_blocking(uint32_t usart)
|
|
{
|
|
usart_wait_recv_ready(usart);
|
|
|
|
return usart_recv(usart);
|
|
}
|
|
|
|
void usart_enable_rx_interrupt(uint32_t usart)
|
|
{
|
|
USART_IER(usart) = USART_CSR_RXRDY;
|
|
}
|
|
|
|
void usart_disable_rx_interrupt(uint32_t usart)
|
|
{
|
|
USART_IDR(usart) = USART_CSR_RXRDY;
|
|
}
|
|
|
|
void usart_wp_enable(uint32_t usart)
|
|
{
|
|
USART_WPMR(usart) = USART_WPMR_KEY | USART_WPMR_WPEN;
|
|
}
|
|
|
|
void usart_wp_disable(uint32_t usart)
|
|
{
|
|
USART_WPMR(usart) = USART_WPMR_KEY & (~USART_WPMR_WPEN);
|
|
}
|
|
|
|
void usart_select_clock(uint32_t usart, enum usart_clock clk)
|
|
{
|
|
uint32_t reg_mr = USART_MR(usart) & (~USART_MR_USCLKS_MASK);
|
|
USART_MR(usart) = ((clk << USART_MR_USCLKS_SHIFT) & USART_MR_USCLKS_MASK) | reg_mr;
|
|
}
|
|
|
|
void usart_set_character_length(uint32_t usart, enum usart_chrl chrl)
|
|
{
|
|
uint32_t reg_mr = USART_MR(usart) & (~USART_MR_CHRL_MASK);
|
|
USART_MR(usart) = reg_mr | (chrl << USART_MR_CHRL_SHIFT);
|
|
}
|