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/*
* Copyright (c) 2015, Freescale Semiconductor, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* o 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.
*
* o Neither the name of Freescale Semiconductor, Inc. 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.
*/
///////////////////////////////////////////////////////////////////////////////
// Includes
///////////////////////////////////////////////////////////////////////////////
#include <stdint.h>
#include <stdbool.h>
#include "uart_imx.h"
#include "board.h"
///////////////////////////////////////////////////////////////////////////////
// Consts
///////////////////////////////////////////////////////////////////////////////
const uint8_t bufferData1[] = "\n\r++++++++++++++++ UART Send/Receive Polling Example +++++++++++++++++\n\r";
const uint8_t bufferData2[] = "\n\rType characters from keyboard, the board will receive and then echo them to terminal screen\n\r";
static void UART_SendDataPolling(UART_Type *base, const uint8_t *txBuff, uint32_t txSize);
static void UART_ReceiveDataPolling(UART_Type *base, uint8_t *rxBuff, uint32_t rxSize);
int main(void)
{
// Setup UART init structure.
uart_init_config_t initConfig = {
.baudRate = 115200u,
.wordLength = uartWordLength8Bits,
.stopBitNum = uartStopBitNumOne,
.parity = uartParityDisable,
.direction = uartDirectionTxRx
};
uint8_t rxChar = 0;
uint32_t byteCount = 0;
/* Initialize board specified hardware. */
hardware_init();
// Get current module clock frequency.
initConfig.clockRate = get_uart_clock_freq(BOARD_DEBUG_UART_BASEADDR);
/* Initialize UART baud rate, bit count, parity, stop bit and direction. */
UART_Init(BOARD_DEBUG_UART_BASEADDR, &initConfig);
/* Set UART build-in hardware FIFO Watermark. */
UART_SetTxFifoWatermark(BOARD_DEBUG_UART_BASEADDR, 16);
UART_SetRxFifoWatermark(BOARD_DEBUG_UART_BASEADDR, 1);
/* Finally, enable the UART module */
UART_Enable(BOARD_DEBUG_UART_BASEADDR);
byteCount = sizeof(bufferData1);
UART_SendDataPolling(BOARD_DEBUG_UART_BASEADDR, bufferData1, byteCount);
byteCount = sizeof(bufferData2);
UART_SendDataPolling(BOARD_DEBUG_UART_BASEADDR, bufferData2, byteCount);
while (true)
{
/* Wait to receive input data */
UART_ReceiveDataPolling(BOARD_DEBUG_UART_BASEADDR, &rxChar, 1u);
/* Send any character that received */
UART_SendDataPolling(BOARD_DEBUG_UART_BASEADDR, &rxChar, 1u);
}
}
static void UART_SendDataPolling(UART_Type *base, const uint8_t *txBuff, uint32_t txSize)
{
while (txSize--)
{
while (!UART_GetStatusFlag(base, uartStatusTxComplete));
UART_Putchar(base, *txBuff++);
}
}
static void UART_ReceiveDataPolling(UART_Type *base, uint8_t *rxBuff, uint32_t rxSize)
{
while (rxSize--)
{
while (!UART_GetStatusFlag(base, uartStatusRxReady));
*rxBuff = UART_Getchar(base);
rxBuff++;
if (UART_GetStatusFlag(base, uartStatusRxOverrun))
UART_ClearStatusFlag(base, uartStatusRxOverrun);
}
}
/*******************************************************************************
* EOF
******************************************************************************/
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