开发环境、硬件

vivado2018.3

正点原子领航者v2开发板
7020

使用管脚：COM2 对应PL的K14 M15

FPGA部分

open block design
添加PS部分

双击进行配置

配置PS串口

设置ddr内存

设置时钟，FCLK就是PL时钟

设置中断用于PL串口

添加uart IP核

Run Block Automation

Run Connection Automation

连接中断到IRQ_F2P（按照红线来）

uart ip点开加号，引出两个端口

搞好后是这个样子

编写XDC约束

set_property -dict {PACKAGE_PIN U18 IOSTANDARD LVCMOS33} [get_ports sys_clk]
set_property -dict {PACKAGE_PIN N16 IOSTANDARD LVCMOS33} [get_ports sys_rst_n]
set_property -dict {PACKAGE_PIN K14 IOSTANDARD LVCMOS33} [get_ports sin_0]
set_property -dict {PACKAGE_PIN M15 IOSTANDARD LVCMOS33} [get_ports sout_0]

生成HDL Wrapper

然后生成Bit Stream
export->HARDWARE

SDK部分

新建一个project
查看其中后缀bsp的文件夹，system.mss为我们提供了范例

此处做修改

在串口中断函数中做修改，xuartns550_intr_example.c

/******************************************************************************
*
* Copyright (C) 2002 - 2015 Xilinx, Inc.  All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* Use of the Software is limited solely to applications:
* (a) running on a Xilinx device, or
* (b) that interact with a Xilinx device through a bus or interconnect.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* XILINX  BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Except as contained in this notice, the name of the Xilinx shall not be used
* in advertising or otherwise to promote the sale, use or other dealings in
* this Software without prior written authorization from Xilinx.
*
******************************************************************************/
/******************************************************************************/
/**
*
* @file xuartns550_intr_example.c
*
* This file contains a design example using the UART 16450/16550 driver
* (XUartNs550) and hardware device using interrupt mode.
*
* @note
*
* <pre>
* MODIFICATION HISTORY:
*
* Ver   Who  Date     Changes
* ----- ---- -------- ----------------------------------------------------------
* 1.00b jhl  02/13/02 First release
* 1.00b sv   06/08/05 Minor changes to comply to Doxygen and coding guidelines
* 1.01a sv   05/08/06 Minor changes for supporting Test App Interrupt examples
* 2.00a ktn  10/20/09 Updated to use HAL processor APIs and minor modifications
*             as per coding guidelines.
* 2.01a ssb  01/11/01 Updated the example to be used with the SCUGIC in
*             Zynq.
* 3.2   adk  15/10/14 Clear the global counters.If multiple instance of ip is
*             present in the h/w design without clearing these counters
*             will result undefined behaviour for the second ip
*             instance while running the peripheral tests.
* 3.4   ms   01/23/17 Added xil_printf statement in main function to
*                     ensure that "Successfully ran" and "Failed" strings
*                     are available in all examples. This is a fix for
*                     CR-965028.
* </pre>
******************************************************************************//***************************** Include Files **********************************/#include "xparameters.h"
#include "xuartns550.h"
#include "xil_exception.h"#ifdef XPAR_INTC_0_DEVICE_ID
#include "xintc.h"
#include <stdio.h>
#else
#include "xscugic.h"
#include "xil_printf.h"
#endif
#include "sleep.h"/************************** Constant Definitions ******************************//** The following constants map to the XPAR parameters created in the* xparameters.h file. They are defined here such that a user can easily* change all the needed parameters in one place.*/
#ifndef TESTAPP_GEN
#define UART_DEVICE_ID      XPAR_UARTNS550_0_DEVICE_ID
#define UART_IRPT_INTR      XPAR_FABRIC_AXI_UART16550_0_IP2INTC_IRPT_INTR#ifdef XPAR_INTC_0_DEVICE_ID
#define INTC_DEVICE_ID      XPAR_INTC_0_DEVICE_ID
#else
#define INTC_DEVICE_ID      XPAR_SCUGIC_SINGLE_DEVICE_ID
#endif /* XPAR_INTC_0_DEVICE_ID */
#endif /* TESTAPP_GEN *//** The following constant controls the length of the buffers to be sent* and received with the UART.*/
#define TEST_BUFFER_SIZE    10/**************************** Type Definitions ********************************/#ifdef XPAR_INTC_0_DEVICE_ID
#define INTC        XIntc
#define INTC_HANDLER    XIntc_InterruptHandler
#else
#define INTC        XScuGic
#define INTC_HANDLER    XScuGic_InterruptHandler
#endif /* XPAR_INTC_0_DEVICE_ID *//************************** Function Prototypes *******************************/int UartNs550IntrExample(INTC *IntcInstancePtr,XUartNs550 *UartInstancePtr,u16 UartDeviceId,u16 UartIntrId);void UartNs550IntrHandler(void *CallBackRef, u32 Event, unsigned int EventData);static int UartNs550SetupIntrSystem(INTC *IntcInstancePtr,XUartNs550 *UartInstancePtr,u16 UartIntrId);static void UartNs550DisableIntrSystem(INTC *IntcInstancePtr, u16 UartIntrId);/************************** Variable Definitions ******************************/#ifndef TESTAPP_GEN
XUartNs550 UartNs550Instance;   /* Instance of the UART Device */
INTC IntcInstance;      /* Instance of the Interrupt Controller */
#endif/** The following buffers are used in this example to send and receive data* with the UART.*/
u8 SendBuffer[TEST_BUFFER_SIZE];    /* Buffer for Transmitting Data */
u8 RecvBuffer[1];   /* Buffer for Receiving Data *//******************************************************************************/
/**
*
* Main function to call the UartNs550 interrupt example.
*
* @param   None.
*
* @return  XST_SUCCESS if successful, otherwise XST_FAILURE.
*
* @note        None.
*
*******************************************************************************/
#ifndef TESTAPP_GEN
int main(void)
{u16 Options;/** Initialize the UART driver so that it's ready to use.*/XUartNs550_Initialize(&UartNs550Instance, UART_DEVICE_ID);/** Perform a self-test to ensure that the hardware was built correctly.*/XUartNs550_SelfTest(&UartNs550Instance);/** Connect the UART to the interrupt subsystem such that interrupts can* occur. This function is application specific.*/UartNs550SetupIntrSystem(&IntcInstance, &UartNs550Instance, UART_IRPT_INTR);/** Setup the handlers for the UART that will be called from the* interrupt context when data has been sent and received, specify a* pointer to the UART driver instance as the callback reference so* the handlers are able to access the instance data.*/XUartNs550_SetHandler(&UartNs550Instance, UartNs550IntrHandler, &UartNs550Instance);Options = XUN_OPTION_DATA_INTR | XUN_OPTION_FIFOS_ENABLE |XUN_OPTION_RESET_TX_FIFO;XUartNs550_SetOptions(&UartNs550Instance, Options);while (1)  {print("running\r\n");sleep(1);}
//  /*
//   * Disable the UartNs550 interrupt.
//   */
//  UartNs550DisableIntrSystem(IntcInstancePtr, UartIntrId);
}
#endif/*****************************************************************************/
/**
*
* This function is the handler which performs processing to handle data events
* from the UartNs550.  It is called from an interrupt context such that the
* amount of processing performed should be minimized.
*
* This handler provides an example of how to handle data for the UART and
* is application specific.
*
* @param   CallBackRef contains a callback reference from the driver,
*       in thiscase it is the instance pointer for the UART driver.
* @param   Event contains the specific kind of event that has occurred.
* @param   EventData contains the number of bytes sent or received for sent
*       and receive events.
*
* @return  None.
*
* @note        None.
*
*******************************************************************************/
void UartNs550IntrHandler(void *CallBackRef, u32 Event, unsigned int EventData)
{u8 Errors;XUartNs550 *UartNs550Ptr = (XUartNs550 *)CallBackRef;/** All of the data has been sent.*/if (Event == XUN_EVENT_SENT_DATA) {xil_printf("send \r\n");}/** All of the data has been received.*/if (Event == XUN_EVENT_RECV_DATA) {XUartNs550_Recv(&UartNs550Instance, RecvBuffer, 1);           //重新接收一下XUartNs550_Send(&UartNs550Instance, RecvBuffer, 1);xil_printf("r:%s \r\n",RecvBuffer);}/** Data was received, but not the expected number of bytes, a* timeout just indicates the data stopped for 4 character times.*/if (Event == XUN_EVENT_RECV_TIMEOUT) {xil_printf("timeout \r\n");}}/******************************************************************************/
/**
*
* This function setups the interrupt system such that interrupts can occur
* for the UART.  This function is application specific since the actual
* system may or may not have an interrupt controller.  The UART could be
* directly connected to a processor without an interrupt controller.  The
* user should modify this function to fit the application.
*
* @param   IntcInstancePtr is a pointer to the instance of the Interrupt
*       Controller.
* @param   UartInstancePtr is a pointer to the instance of the UART.
* @param   UartIntrId is the interrupt Id and is typically
*       XPAR_<INTC_instance>_<UARTNS550_instance>_VEC_ID value from
*       xparameters.h.
*
* @return  XST_SUCCESS if successful, otherwise XST_FAILURE.
*
* @note        None.
*
*******************************************************************************/
static int UartNs550SetupIntrSystem(INTC *IntcInstancePtr,XUartNs550 *UartInstancePtr,u16 UartIntrId)
{int Status;
#ifdef XPAR_INTC_0_DEVICE_ID
#ifndef TESTAPP_GEN/** Initialize the interrupt controller driver so that it is ready* to use.*/Status = XIntc_Initialize(IntcInstancePtr, INTC_DEVICE_ID);if (Status != XST_SUCCESS) {return XST_FAILURE;}
#endif /* TESTAPP_GEN *//** Connect a device driver handler that will be called when an interrupt* for the device occurs, the device driver handler performs the* specific interrupt processing for the device.*/Status = XIntc_Connect(IntcInstancePtr, UartIntrId,(XInterruptHandler)XUartNs550_InterruptHandler,(void *)UartInstancePtr);if (Status != XST_SUCCESS) {return XST_FAILURE;}#ifndef TESTAPP_GEN/** Start the interrupt controller such that interrupts are enabled for* all devices that cause interrupts, specific real mode so that* the UART can cause interrupts thru the interrupt controller.*/Status = XIntc_Start(IntcInstancePtr, XIN_REAL_MODE);if (Status != XST_SUCCESS) {return XST_FAILURE;}
#endif /* TESTAPP_GEN *//** Enable the interrupt for the UartNs550.*/XIntc_Enable(IntcInstancePtr, UartIntrId);#else
#ifndef TESTAPP_GENXScuGic_Config *IntcConfig;/** Initialize the interrupt controller driver so that it is ready to* use.*/IntcConfig = XScuGic_LookupConfig(INTC_DEVICE_ID);if (NULL == IntcConfig) {return XST_FAILURE;}Status = XScuGic_CfgInitialize(IntcInstancePtr, IntcConfig,IntcConfig->CpuBaseAddress);if (Status != XST_SUCCESS) {return XST_FAILURE;}
#endif /* TESTAPP_GEN */XScuGic_SetPriorityTriggerType(IntcInstancePtr, UartIntrId,0xA0, 0x3);/** Connect the interrupt handler that will be called when an* interrupt occurs for the device.*/Status = XScuGic_Connect(IntcInstancePtr, UartIntrId,(Xil_ExceptionHandler)XUartNs550_InterruptHandler,UartInstancePtr);if (Status != XST_SUCCESS) {return Status;}/** Enable the interrupt for the Timer device.*/XScuGic_Enable(IntcInstancePtr, UartIntrId);
#endif /* XPAR_INTC_0_DEVICE_ID */#ifndef TESTAPP_GEN/** Initialize the exception table.*/Xil_ExceptionInit();/** Register the interrupt controller handler with the exception table.*/Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,(Xil_ExceptionHandler)INTC_HANDLER,IntcInstancePtr);/** Enable exceptions.*/Xil_ExceptionEnable();#endif /* TESTAPP_GEN */return XST_SUCCESS;
}/*****************************************************************************/
/**
*
* This function disables the interrupts that occur for the UartNs550 device.
*
* @param   IntcInstancePtr is the pointer to the instance of the Interrupt
*       Controller.
* @param   UartIntrId is the interrupt Id and is typically
*       XPAR_<INTC_instance>_<UARTNS550_instance>_VEC_ID
*       value from xparameters.h.
*
* @return  None.
*
* @note        None.
*
******************************************************************************/
static void UartNs550DisableIntrSystem(INTC *IntcInstancePtr, u16 UartIntrId)
{/** Disconnect and disable the interrupt for the UartNs550 device.*/
#ifdef XPAR_INTC_0_DEVICE_IDXIntc_Disconnect(IntcInstancePtr, UartIntrId);
#elseXScuGic_Disable(IntcInstancePtr, UartIntrId);XScuGic_Disconnect(IntcInstancePtr, UartIntrId);#endif}

实现效果：发给com2的内容直接从com2返回，并打印到ps端串口

PL串口相关寄存器

在xparameters.h中


/* Definitions for driver UARTNS550 */
#define XPAR_XUARTNS550_NUM_INSTANCES 1U
#define XPAR_XUARTNS550_CLOCK_HZ 50000000U/* Definitions for peripheral AXI_UART16550_0 */
#define XPAR_AXI_UART16550_0_DEVICE_ID 0U
#define XPAR_AXI_UART16550_0_BASEADDR 0x43C00000U
#define XPAR_AXI_UART16550_0_HIGHADDR 0x43C0FFFFU
#define XPAR_AXI_UART16550_0_CLOCK_FREQ_HZ 50000000U/******************************************************************//* Canonical definitions for peripheral AXI_UART16550_0 */
#define XPAR_UARTNS550_0_DEVICE_ID 0U
#define XPAR_UARTNS550_0_BASEADDR 0x43C00000U
#define XPAR_UARTNS550_0_HIGHADDR 0x43C0FFFFU
#define XPAR_UARTNS550_0_CLOCK_FREQ_HZ XPAR_AXI_UART16550_0_CLOCK_FREQ_HZ//中断寄存器
/* Definitions for Fabric interrupts connected to ps7_scugic_0 */
#define XPAR_FABRIC_AXI_UART16550_0_IP2INTC_IRPT_INTR 61U/******************************************************************//* Canonical definitions for Fabric interrupts connected to ps7_scugic_0 */
#define XPAR_FABRIC_UARTNS550_0_VEC_ID XPAR_FABRIC_AXI_UART16550_0_IP2INTC_IRPT_INTR/******************************************************************/

主要的库函数均在这些文件之中 pluartbsp/ps7_cortexa9_0/libsrc/uartns550_v3_5之下

主要调用的函数

 u16 Options;/** Initialize the UART driver so that it's ready to use.* 初始化自定义串口*/XUartNs550_Initialize(&UartNs550Instance, UART_DEVICE_ID);/** Perform a self-test to ensure that the hardware was built correctly.* 自定义串口自检*/XUartNs550_SelfTest(&UartNs550Instance);/** Connect the UART to the interrupt subsystem such that interrupts can* occur. This function is application specific.* 初始化自定义串口中断*/UartNs550SetupIntrSystem(&IntcInstance, &UartNs550Instance, UART_IRPT_INTR);/** Setup the handlers for the UART that will be called from the* interrupt context when data has been sent and received, specify a* pointer to the UART driver instance as the callback reference so* the handlers are able to access the instance data.* 注册中断回调函数*/XUartNs550_SetHandler(&UartNs550Instance, UartNs550IntrHandler, &UartNs550Instance);Options = XUN_OPTION_DATA_INTR | XUN_OPTION_FIFOS_ENABLE |XUN_OPTION_RESET_TX_FIFO;/**配置串口选项*/XUartNs550_SetOptions(&UartNs550Instance, Options);

options在xuartns550.h中定义

/** @name Configuration options* @{*/
/*** These constants specify the options that may be set or retrieved* with the driver, each is a unique bit mask such that multiple options* may be specified.  These constants indicate the function of the option* when in the active state.*/
#define XUN_OPTION_RXLINE_INTR      0x0800 /**< Enable status interrupt */
#define XUN_OPTION_SET_BREAK        0x0400 /**< Set a break condition */
#define XUN_OPTION_LOOPBACK     0x0200 /**< Enable local loopback */
#define XUN_OPTION_DATA_INTR        0x0100 /**< Enable data interrupts */
#define XUN_OPTION_MODEM_INTR       0x0080 /**< Enable modem interrupts */
#define XUN_OPTION_FIFOS_ENABLE     0x0040 /**< Enable FIFOs */
#define XUN_OPTION_RESET_TX_FIFO    0x0020 /**< Reset the transmit FIFO */
#define XUN_OPTION_RESET_RX_FIFO    0x0010 /**< Reset the receive FIFO */
#define XUN_OPTION_ASSERT_OUT2      0x0008 /**< Assert out2 signal */
#define XUN_OPTION_ASSERT_OUT1      0x0004 /**< Assert out1 signal */
#define XUN_OPTION_ASSERT_RTS       0x0002 /**< Assert RTS signal */
#define XUN_OPTION_ASSERT_DTR       0x0001 /**< Assert DTR signal */
/*@}*/

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目录

开发环境、硬件

FPGA部分

SDK部分

PL串口相关寄存器

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