在msp432e401y中关于UART中断是不是只要使能了UART中断就已经默认启用FIFO?

在msp432e401y中关于UART中断是不是只要使能了UART中断就已经默认启用FIFO?

xyz549040622：

也不一定，你最好还是手动开启和关闭FIFO。

gaoyang9992006：

extern void UARTFIFOEnable(uint32_t ui32Base);

gaoyang9992006：

下载的头文件里面有介绍

//*****************************************************************************
//
// uart.h - Defines and Macros for the UART.
//
// Copyright (c) 2005-2017 Texas Instruments Incorporated.All rights reserved.
// Software License Agreement
//
//Redistribution and use in source and binary forms, with or without
//modification, are permitted provided that the following conditions
//are met:
//
//Redistributions of source code must retain the above copyright
//notice, this list of conditions and the following disclaimer.
//
//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.
//
//Neither the name of Texas Instruments Incorporated 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
// OWNER 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.
//
//*****************************************************************************#ifndef __DRIVERLIB_UART_H__
#define __DRIVERLIB_UART_H__#include <stdint.h>
#include <stdbool.h>//*****************************************************************************
//
// If building with a C++ compiler, make all of the definitions in this header
// have a C binding.
//
//*****************************************************************************
#ifdef __cplusplus
extern "C"
{
#endif//*****************************************************************************
//
// Values that can be passed to UARTIntEnable, UARTIntDisable, and UARTIntClear
// as the ui32IntFlags parameter, and returned from UARTIntStatus.
//
//*****************************************************************************
#define UART_INT_DMATX0x20000// DMA TX interrupt
#define UART_INT_DMARX0x10000// DMA RX interrupt
#define UART_INT_9BIT0x1000// 9-bit address match interrupt
#define UART_INT_OE0x400// Overrun Error Interrupt Mask
#define UART_INT_BE0x200// Break Error Interrupt Mask
#define UART_INT_PE0x100// Parity Error Interrupt Mask
#define UART_INT_FE0x080// Framing Error Interrupt Mask
#define UART_INT_RT0x040// Receive Timeout Interrupt Mask
#define UART_INT_TX0x020// Transmit Interrupt Mask
#define UART_INT_RX0x010// Receive Interrupt Mask
#define UART_INT_DSR0x008// DSR Modem Interrupt Mask
#define UART_INT_DCD0x004// DCD Modem Interrupt Mask
#define UART_INT_CTS0x002// CTS Modem Interrupt Mask
#define UART_INT_RI0x001// RI Modem Interrupt Mask//*****************************************************************************
//
// Values that can be passed to UARTConfigSetExpClk as the ui32Config parameter
// and returned by UARTConfigGetExpClk in the pui32Config parameter.
// Additionally, the UART_CONFIG_PAR_* subset can be passed to
// UARTParityModeSet as the ui32Parity parameter, and are returned by
// UARTParityModeGet.
//
//*****************************************************************************
#define UART_CONFIG_WLEN_MASK0x00000060// Mask for extracting word length
#define UART_CONFIG_WLEN_80x00000060// 8 bit data
#define UART_CONFIG_WLEN_70x00000040// 7 bit data
#define UART_CONFIG_WLEN_60x00000020// 6 bit data
#define UART_CONFIG_WLEN_50x00000000// 5 bit data
#define UART_CONFIG_STOP_MASK0x00000008// Mask for extracting stop bits
#define UART_CONFIG_STOP_ONE0x00000000// One stop bit
#define UART_CONFIG_STOP_TWO0x00000008// Two stop bits
#define UART_CONFIG_PAR_MASK0x00000086// Mask for extracting parity
#define UART_CONFIG_PAR_NONE0x00000000// No parity
#define UART_CONFIG_PAR_EVEN0x00000006// Even parity
#define UART_CONFIG_PAR_ODD0x00000002// Odd parity
#define UART_CONFIG_PAR_ONE0x00000082// Parity bit is one
#define UART_CONFIG_PAR_ZERO0x00000086// Parity bit is zero//*****************************************************************************
//
// Values that can be passed to UARTFIFOLevelSet as the ui32TxLevel parameter
// and returned by UARTFIFOLevelGet in the pui32TxLevel.
//
//*****************************************************************************
#define UART_FIFO_TX1_80x00000000// Transmit interrupt at 1/8 Full
#define UART_FIFO_TX2_80x00000001// Transmit interrupt at 1/4 Full
#define UART_FIFO_TX4_80x00000002// Transmit interrupt at 1/2 Full
#define UART_FIFO_TX6_80x00000003// Transmit interrupt at 3/4 Full
#define UART_FIFO_TX7_80x00000004// Transmit interrupt at 7/8 Full//*****************************************************************************
//
// Values that can be passed to UARTFIFOLevelSet as the ui32RxLevel parameter
// and returned by UARTFIFOLevelGet in the pui32RxLevel.
//
//*****************************************************************************
#define UART_FIFO_RX1_80x00000000// Receive interrupt at 1/8 Full
#define UART_FIFO_RX2_80x00000008// Receive interrupt at 1/4 Full
#define UART_FIFO_RX4_80x00000010// Receive interrupt at 1/2 Full
#define UART_FIFO_RX6_80x00000018// Receive interrupt at 3/4 Full
#define UART_FIFO_RX7_80x00000020// Receive interrupt at 7/8 Full//*****************************************************************************
//
// Values that can be passed to UARTDMAEnable() and UARTDMADisable().
//
//*****************************************************************************
#define UART_DMA_ERR_RXSTOP0x00000004// Stop DMA receive if UART error
#define UART_DMA_TX0x00000002// Enable DMA for transmit
#define UART_DMA_RX0x00000001// Enable DMA for receive//*****************************************************************************
//
// Values returned from UARTRxErrorGet().
//
//*****************************************************************************
#define UART_RXERROR_OVERRUN0x00000008
#define UART_RXERROR_BREAK0x00000004
#define UART_RXERROR_PARITY0x00000002
#define UART_RXERROR_FRAMING0x00000001//*****************************************************************************
//
// Values that can be passed to UARTHandshakeOutputsSet() or returned from
// UARTHandshakeOutputGet().
//
//*****************************************************************************
#define UART_OUTPUT_RTS0x00000800
#define UART_OUTPUT_DTR0x00000400//*****************************************************************************
//
// Values that can be returned from UARTHandshakeInputsGet().
//
//*****************************************************************************
#define UART_INPUT_RI0x00000100
#define UART_INPUT_DCD0x00000004
#define UART_INPUT_DSR0x00000002
#define UART_INPUT_CTS0x00000001//*****************************************************************************
//
// Values that can be passed to UARTFlowControl() or returned from
// UARTFlowControlGet().
//
//*****************************************************************************
#define UART_FLOWCONTROL_TX0x00008000
#define UART_FLOWCONTROL_RX0x00004000
#define UART_FLOWCONTROL_NONE0x00000000//*****************************************************************************
//
// Values that can be passed to UARTTxIntModeSet() or returned from
// UARTTxIntModeGet().
//
//*****************************************************************************
#define UART_TXINT_MODE_FIFO0x00000000
#define UART_TXINT_MODE_EOT0x00000010//*****************************************************************************
//
// Values that can be passed to UARTClockSourceSet() or returned from
// UARTClockSourceGet().
//
//*****************************************************************************
#define UART_CLOCK_SYSTEM0x00000000
#define UART_CLOCK_ALTCLK0x00000005//*****************************************************************************
//
// API Function prototypes
//
//*****************************************************************************
extern void UARTParityModeSet(uint32_t ui32Base, uint32_t ui32Parity);
extern uint32_t UARTParityModeGet(uint32_t ui32Base);
extern void UARTFIFOLevelSet(uint32_t ui32Base, uint32_t ui32TxLevel,uint32_t ui32RxLevel);
extern void UARTFIFOLevelGet(uint32_t ui32Base, uint32_t *pui32TxLevel,uint32_t *pui32RxLevel);
extern void UARTConfigSetExpClk(uint32_t ui32Base, uint32_t ui32UARTClk,uint32_t ui32Baud, uint32_t ui32Config);
extern void UARTConfigGetExpClk(uint32_t ui32Base, uint32_t ui32UARTClk,uint32_t *pui32Baud, uint32_t *pui32Config);
extern void UARTEnable(uint32_t ui32Base);
extern void UARTDisable(uint32_t ui32Base);
extern void UARTFIFOEnable(uint32_t ui32Base);
extern void UARTFIFODisable(uint32_t ui32Base);
extern void UARTEnableSIR(uint32_t ui32Base, bool bLowPower);
extern void UARTDisableSIR(uint32_t ui32Base);
extern bool UARTCharsAvail(uint32_t ui32Base);
extern bool UARTSpaceAvail(uint32_t ui32Base);
extern int32_t UARTCharGetNonBlocking(uint32_t ui32Base);
extern int32_t UARTCharGet(uint32_t ui32Base);
extern bool UARTCharPutNonBlocking(uint32_t ui32Base, unsigned char ucData);
extern void UARTCharPut(uint32_t ui32Base, unsigned char ucData);
extern void UARTBreakCtl(uint32_t ui32Base, bool bBreakState);
extern bool UARTBusy(uint32_t ui32Base);
extern void UARTIntRegister(uint32_t ui32Base, void (*pfnHandler)(void));
extern void UARTIntUnregister(uint32_t ui32Base);
extern void UARTIntEnable(uint32_t ui32Base, uint32_t ui32IntFlags);
extern void UARTIntDisable(uint32_t ui32Base, uint32_t ui32IntFlags);
extern uint32_t UARTIntStatus(uint32_t ui32Base, bool bMasked);
extern void UARTIntClear(uint32_t ui32Base, uint32_t ui32IntFlags);
extern void UARTDMAEnable(uint32_t ui32Base, uint32_t ui32DMAFlags);
extern void UARTDMADisable(uint32_t ui32Base, uint32_t ui32DMAFlags);
extern uint32_t UARTRxErrorGet(uint32_t ui32Base);
extern void UARTRxErrorClear(uint32_t ui32Base);
extern void UARTSmartCardEnable(uint32_t ui32Base);
extern void UARTSmartCardDisable(uint32_t ui32Base);
extern void UARTModemControlSet(uint32_t ui32Base, uint32_t ui32Control);
extern void UARTModemControlClear(uint32_t ui32Base, uint32_t ui32Control);
extern uint32_t UARTModemControlGet(uint32_t ui32Base);
extern uint32_t UARTModemStatusGet(uint32_t ui32Base);
extern void UARTFlowControlSet(uint32_t ui32Base, uint32_t ui32Mode);
extern uint32_t UARTFlowControlGet(uint32_t ui32Base);
extern void UARTTxIntModeSet(uint32_t ui32Base, uint32_t ui32Mode);
extern uint32_t UARTTxIntModeGet(uint32_t ui32Base);
extern void UARTClockSourceSet(uint32_t ui32Base, uint32_t ui32Source);
extern uint32_t UARTClockSourceGet(uint32_t ui32Base);
extern void UART9BitEnable(uint32_t ui32Base);
extern void UART9BitDisable(uint32_t ui32Base);
extern void UART9BitAddrSet(uint32_t ui32Base, uint8_t ui8Addr,uint8_t ui8Mask);
extern void UART9BitAddrSend(uint32_t ui32Base, uint8_t ui8Addr);
extern void UARTLoopbackEnable(uint32_t ui32Base);//*****************************************************************************
//
// Mark the end of the C bindings section for C++ compilers.
//
//*****************************************************************************
#ifdef __cplusplus
}
#endif#endif // __DRIVERLIB_UART_H__

Susan Yang：

在TRM内有相关的说明

Out of reset, both FIFOs are disabled and act as 1-byte-deep holding registers. The FIFOs are enabled by setting the FEN bit in UARTLCRH

您可以通过 UARTFIFOEnable 以及 UARTFIFODisable 来启用和禁用FIFO

dev.ti.com/…/group__uart__api.html