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/******************************************************************************
* Copyright (C) 2002 - 2020 Xilinx, Inc. All rights reserved.
* SPDX-License-Identifier: MIT
******************************************************************************/
/****************************************************************************/
/**
*
* @file xuartlite_l.c
* @addtogroup uartlite_v3_5
* @{
*
* This file contains low-level driver functions that can be used to access the
* device. The user should refer to the hardware device specification for more
* details of the device operation.
* <pre>
* MODIFICATION HISTORY:
*
* Ver Who Date Changes
* ----- ---- -------- -----------------------------------------------
* 1.00b rpm 04/25/02 First release
* 1.12a rpm 07/16/07 Fixed arg type for RecvByte
* 2.00a ktn 10/20/09 The macros have been renamed to remove _m from the name.
* 3.2 sk 11/10/15 Used UINTPTR instead of u32 for Baseaddress CR# 867425.
* Changed the prototypes of XUartLite_SendByte,
* XUartLite_RecvByte APIs.
* </pre>
*
******************************************************************************/
/***************************** Include Files *********************************/
#ifndef __rtems__
#include "xuartlite_l.h"
#else
#include <dev/serial/uartlite_l.h>
#endif /* __rtems__ */
/************************** Constant Definitions *****************************/
/**************************** Type Definitions *******************************/
/***************** Macros (Inline Functions) Definitions *********************/
/************************** Function Prototypes ******************************/
/************************** Variable Prototypes ******************************/
/****************************************************************************/
/**
*
* This functions sends a single byte using the UART. It is blocking in that it
* waits for the transmitter to become non-full before it writes the byte to
* the transmit register.
*
* @param BaseAddress is the base address of the device
* @param Data is the byte of data to send
*
* @return None.
*
* @note None.
*
******************************************************************************/
void XUartLite_SendByte(UINTPTR BaseAddress, u8 Data)
{
while (XUartLite_IsTransmitFull(BaseAddress));
XUartLite_WriteReg(BaseAddress, XUL_TX_FIFO_OFFSET, Data);
}
/****************************************************************************/
/**
*
* This functions receives a single byte using the UART. It is blocking in that
* it waits for the receiver to become non-empty before it reads from the
* receive register.
*
* @param BaseAddress is the base address of the device
*
* @return The byte of data received.
*
* @note None.
*
******************************************************************************/
u8 XUartLite_RecvByte(UINTPTR BaseAddress)
{
while (XUartLite_IsReceiveEmpty(BaseAddress));
return (u8)XUartLite_ReadReg(BaseAddress, XUL_RX_FIFO_OFFSET);
}
/** @} */
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