75 lines
2.7 KiB
C
75 lines
2.7 KiB
C
/* uart.h - public UART driver APIs */
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/*
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* Copyright (c) 2015 Wind River Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of Wind River Systems nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __INCuarth
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#define __INCuarth
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* generic UART info structure */
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struct uart_init_info {
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int baud_rate;
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uint32_t sys_clk_freq; /* in Hz */
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uint8_t options; /* HW Flow Control option */
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uint8_t int_pri; /* interrupt priority level */
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};
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/* UART driver has to configure the device to 8n1 */
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void uart_init(int port, const struct uart_init_info *const pinfo);
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/* console I/O functions */
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int uart_poll_in(int port, unsigned char *pChar);
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unsigned char uart_poll_out(int port, unsigned char outChar);
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/* interrupt driven I/O functions */
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int uart_fifo_fill(int port, const uint8_t *txData, int len);
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int uart_fifo_read(int port, uint8_t *rxData, const int size);
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void uart_irq_tx_enable(int port);
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void uart_irq_tx_disable(int port);
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int uart_irq_tx_ready(int port);
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void uart_irq_rx_enable(int port);
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void uart_irq_rx_disable(int port);
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int uart_irq_rx_ready(int port);
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void uart_irq_err_enable(int port);
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void uart_irq_err_disable(int port);
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int uart_irq_is_pending(int port);
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int uart_irq_update(int port);
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unsigned int uart_irq_get(int port);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __INCuarth */
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