7df63fcae0
Added --terse and --mailback options to the make stylecheck target. It also does continue even if it enounters a possible error. We decided on two exceptions from the linux kernel coding standard: - Empty wait while loops may end with ; on the same line. - All blocks after while, if, for have to be in brackets even if they only contain one statement. Otherwise it is easy to introduce an error. Checkpatch needs to be adapted to reflect those changes.
110 lines
2.5 KiB
C
110 lines
2.5 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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*
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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/sam/usart.h>
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#include <libopencm3/sam/pmc.h>
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void usart_set_baudrate(u32 usart, u32 baud)
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{
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USART_BRGR(usart) = pmc_mck_frequency / (16 * baud);
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}
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void usart_set_databits(u32 usart, int bits)
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{
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USART_MR(usart) = (USART_MR(usart) & ~USART_MR_CHRL_MASK) |
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((bits - 5) << 6);
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}
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void usart_set_stopbits(u32 usart, enum usart_stopbits sb)
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{
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USART_MR(usart) = (USART_MR(usart) & ~USART_MR_NBSTOP_MASK) |
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(sb << 12);
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}
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void usart_set_parity(u32 usart, enum usart_parity par)
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{
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USART_MR(usart) = (USART_MR(usart) & ~USART_MR_PAR_MASK) | (par << 9);
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}
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void usart_set_mode(u32 usart, enum usart_mode mode)
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{
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USART_CR(usart) =
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(mode & USART_MODE_RX) ? USART_CR_RXEN : USART_CR_RXDIS;
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USART_CR(usart) = (mode & USART_MODE_TX) ? USART_CR_TXEN
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: USART_CR_TXDIS;
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}
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void usart_set_flow_control(u32 usart, enum usart_flowcontrol fc)
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{
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USART_MR(usart) = (USART_MR(usart) & ~USART_MR_MODE_MASK) |
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(fc ? USART_MR_MODE_HW_HANDSHAKING : 0);
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}
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void usart_enable(u32 usart)
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{
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}
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void usart_disable(u32 usart)
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{
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}
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void usart_send(u32 usart, u16 data)
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{
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USART_THR(usart) = data;
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}
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u16 usart_recv(u32 usart)
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{
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return USART_RHR(usart) & 0x1f;
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}
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void usart_wait_send_ready(u32 usart)
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{
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while ((USART_CSR(usart) & USART_CSR_TXRDY) == 0);
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}
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void usart_wait_recv_ready(u32 usart)
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{
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while ((USART_CSR(usart) & USART_CSR_RXRDY) == 0);
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}
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void usart_send_blocking(u32 usart, u16 data)
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{
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usart_wait_send_ready(usart);
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usart_send(usart, data);
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}
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u16 usart_recv_blocking(u32 usart)
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{
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usart_wait_recv_ready(usart);
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return usart_recv(usart);
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}
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void usart_enable_rx_interrupt(u32 usart)
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{
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USART_IER(usart) = USART_CSR_RXRDY;
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}
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void usart_disable_rx_interrupt(u32 usart)
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{
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USART_IDR(usart) = USART_CSR_RXRDY;
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}
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