nes-proj/arch/cpu/simplelink/source/simplelink-uart.c

111 lines
3.4 KiB
C
Raw Normal View History

2018-02-07 15:58:16 +00:00
/*
* Copyright (c) 2014, Texas Instruments Incorporated - http://www.ti.com/
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*---------------------------------------------------------------------------*/
/**
* \addtogroup cc26xx-uart
* @{
*
* \file
* Implementation of the CC13xx/CC26xx UART driver.
*/
/*---------------------------------------------------------------------------*/
#include <Board.h>
#include <ti/drivers/UART.h>
#include <stdint.h>
2018-02-08 09:35:08 +00:00
#include "simplelink-uart.h"
static UART_Handle gh_uart;
static volatile InputCb g_input_cb;
static unsigned char g_charbuf;
/*---------------------------------------------------------------------------*/
static void
uart_cb(UART_Handle handle, void *buf, size_t count)
{
if (!g_input_cb) { return; }
const InputCb currCb = g_input_cb;
currCb(g_charbuf);
if (currCb == g_input_cb)
{
UART_read(gh_uart, &g_charbuf, 1);
}
}
2018-02-07 15:58:16 +00:00
/*---------------------------------------------------------------------------*/
void
simplelink_uart_init(void)
{
UART_init();
UART_Params params;
UART_Params_init(&params);
2018-02-08 09:35:08 +00:00
params.readMode = UART_MODE_CALLBACK;
params.writeMode = UART_MODE_BLOCKING ;
params.readCallback = uart_cb;
2018-02-07 15:58:16 +00:00
// TODO configure
2018-02-08 09:35:08 +00:00
gh_uart = UART_open(Board_UART0, &params);
if (!gh_uart)
2018-02-07 15:58:16 +00:00
{
for (;;) { /* hang */ }
}
}
/*---------------------------------------------------------------------------*/
int_fast32_t
simplelink_uart_write(const void *buffer, size_t size)
{
2018-02-08 09:35:08 +00:00
if (!gh_uart)
2018-02-07 15:58:16 +00:00
{
return UART_STATUS_ERROR;
}
2018-02-08 09:35:08 +00:00
return UART_write(gh_uart, buffer, size);
2018-02-07 15:58:16 +00:00
}
/*---------------------------------------------------------------------------*/
2018-02-08 09:35:08 +00:00
void
simplelink_uart_set_callback(InputCb input_cb)
2018-02-07 15:58:16 +00:00
{
2018-02-08 09:35:08 +00:00
if (g_input_cb == input_cb) { return; }
g_input_cb = input_cb;
if (input_cb)
2018-02-07 15:58:16 +00:00
{
2018-02-08 09:35:08 +00:00
UART_read(gh_uart, &g_charbuf, 1);
}
else
{
UART_readCancel(gh_uart);
2018-02-07 15:58:16 +00:00
}
}
/*---------------------------------------------------------------------------*/
/** @} */