94cf07d9a9
- General clean-up and commenting. - Added comment documentation to the examples, as well as some general information in xdptx.h. - Examples now identify the CPU architecture using the existence of XPAR_INTC_0_DEVICE_ID from the xparameters.h instead of the __MICROBLAZE__ macro. - Added and renamed some files for improved integration into SDK. - Cleaned-up documentation and code for readability. - No longer returning XST_INVALID_PARAMETER in lieu of asserts. - Renamed TxConfig member of the XDptx structure to Config. Signed-off-by: Andrei-Liviu Simion <andrei.simion@xilinx.com>
326 lines
13 KiB
C
326 lines
13 KiB
C
/*******************************************************************************
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*
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* Copyright (C) 2014 Xilinx, Inc. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* Use of the Software is limited solely to applications:
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* (a) running on a Xilinx device, or
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* (b) that interact with a Xilinx device through a bus or interconnect.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* XILINX CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
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* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Except as contained in this notice, the name of the Xilinx shall not be used
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* in advertising or otherwise to promote the sale, use or other dealings in
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* this Software without prior written authorization from Xilinx.
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*
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*******************************************************************************/
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/******************************************************************************/
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/**
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*
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* @file xdptx_intr_timer_example.c
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*
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* Contains a design example using the XDptx driver with interrupts and. Upon Hot-
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* Plug-Detect (HPD - DisplayPort cable is plugged/unplugged or the monitor is
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* turned on/off), the main link will be trained.
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*
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* @note This example requires an interrupt controller connected to the
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* processor and the DisplayPort TX core in the system.
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* @note This example requires an AXI timer in the system.
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* @note For this example to display output, the user will need to
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* implement initialization of the system (Dptx_PlatformInit) and,
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* after training is complete, implement configuration of the video
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* stream source in order to provide the DisplayPort core with
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* input (Dptx_ConfigureVidgen - called in xdptx_example_common.c).
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* See XAPP1178 for reference.
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* @note The functions Dptx_PlatformInit and Dptx_ConfigureVidgen are
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* declared extern in xdptx_example_common.h and are left up to the
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* user to implement.
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*
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* <pre>
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* MODIFICATION HISTORY:
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*
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* Ver Who Date Changes
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* ----- ---- -------- -----------------------------------------------
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* 1.00a als 06/17/14 Initial creation.
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* </pre>
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*
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*******************************************************************************/
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/******************************* Include Files ********************************/
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#include "xdptx.h"
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#include "xdptx_example_common.h"
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#include "xil_printf.h"
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#include "xparameters.h"
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#include "xstatus.h"
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#include "xtmrctr.h"
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#ifdef XPAR_INTC_0_DEVICE_ID
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/* For MicroBlaze systems. */
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#include "xintc.h"
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#else
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/* For ARM/Zynq SoC systems. */
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#include "xscugic.h"
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#endif /* XPAR_INTC_0_DEVICE_ID */
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/**************************** Constant Definitions ****************************/
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/* The following constants map to the XPAR parameters created in the
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* xparameters.h file. */
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#ifdef XPAR_INTC_0_DEVICE_ID
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#define DP_INTERRUPT_ID XPAR_AXI_INTC_1_DISPLAYPORT_0_AXI_INT_INTR
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#define INTC_DEVICE_ID XPAR_INTC_0_DEVICE_ID
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#else
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#define DP_INTERRUPT_ID XPAR_FABRIC_DISPLAYPORT_0_AXI_INT_INTR
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#define INTC_DEVICE_ID XPAR_SCUGIC_SINGLE_DEVICE_ID
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#endif /* XPAR_INTC_0_DEVICE_ID */
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/****************************** Type Definitions ******************************/
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/* Depending on whether the system is a MicroBlaze or ARM/Zynq SoC system,
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* different drivers and associated types will be used. */
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#ifdef XPAR_INTC_0_DEVICE_ID
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#define INTC XIntc
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#define INTC_HANDLER XIntc_InterruptHandler
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#else
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#define INTC XScuGic
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#define INTC_HANDLER XScuGic_InterruptHandler
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#endif /* XPAR_INTC_0_DEVICE_ID */
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/**************************** Function Prototypes *****************************/
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static u32 Dptx_SetupInterruptHandler(XDptx *InstancePtr);
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static void Dptx_HpdEventHandler(void *InstancePtr);
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static void Dptx_HpdPulseHandler(void *InstancePtr);
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static void Dptx_CustomWaitUs(void *InstancePtr, u32 MicroSeconds);
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/**************************** Variable Definitions ****************************/
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INTC IntcInstance; /* The interrupt controller instance. */
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XTmrCtr TimerCounterInst; /* The timer counter instance. */
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/**************************** Function Definitions ****************************/
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int main(void)
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{
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u32 Status;
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/* Do platform initialization here. This is hardware system specific -
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* it is up to the user to implement this function. */
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Dptx_PlatformInit();
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/******************/
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/* Set a custom timer handler for improved delay accuracy on MicroBlaze
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* systems since the driver does not assume/have a dependency on the
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* system having a timer in the FPGA.
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* Note: This only has an affect for MicroBlaze systems since the Zynq
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* SoC contains a timer, which is used when the driver calls the sleep
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* function. */
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XDptx_SetUserTimerHandler(&DptxInstance, &Dptx_CustomWaitUs,
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&TimerCounterInst);
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Status = Dptx_SetupExample(&DptxInstance, DPTX_DEVICE_ID);
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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XDptx_EnableTrainAdaptive(&DptxInstance, TRAIN_ADAPTIVE);
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XDptx_SetHasRedriverInPath(&DptxInstance, TRAIN_HAS_REDRIVER);
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/* Setup interrupt handling in the system. */
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Status = Dptx_SetupInterruptHandler(&DptxInstance);
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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/* Do not return in order to allow interrupt handling to run. */
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while (1);
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return XST_SUCCESS;
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}
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/******************************************************************************/
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/**
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* This function sets up the interrupt system such that interrupts caused by
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* Hot-Plug-Detect (HPD) events and pulses are handled. This function is
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* application-specific for systems that have an interrupt controller connected
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* to the processor. The user should modify this function to fit the
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* application.
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*
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* @param InstancePtr is a pointer to the XDptx instance.
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*
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* @return - XST_SUCCESS if the interrupt system was successfully set up.
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* - XST_FAILURE otherwise.
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*
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* @note An interrupt controller must be present in the system, connected
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* to the processor and the DisplayPort TX core.
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*
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*******************************************************************************/
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static u32 Dptx_SetupInterruptHandler(XDptx *InstancePtr)
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{
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u32 Status;
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/* Set the HPD interrupt handlers. */
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XDptx_SetHpdEventHandler(InstancePtr, &Dptx_HpdEventHandler,
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InstancePtr);
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XDptx_SetHpdPulseHandler(InstancePtr, &Dptx_HpdPulseHandler,
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InstancePtr);
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/* Initialize interrupt controller driver. */
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#ifdef XPAR_INTC_0_DEVICE_ID
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Status = XIntc_Initialize(&IntcInstance, INTC_DEVICE_ID);
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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#else
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XScuGic_Config *IntcConfig;
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IntcConfig = XScuGic_LookupConfig(INTC_DEVICE_ID);
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Status = XScuGic_CfgInitialize(&IntcInstance, IntcConfig,
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IntcConfig->CpuBaseAddress);
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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XScuGic_SetPriorityTriggerType(&IntcInstance, DP_INTERRUPT_ID,
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0xA0, 0x1);
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#endif /* XPAR_INTC_0_DEVICE_ID */
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/* Connect the device driver handler that will be called when an
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* interrupt for the device occurs, the handler defined above performs
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* the specific interrupt processing for the device. */
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#ifdef XPAR_INTC_0_DEVICE_ID
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Status = XIntc_Connect(&IntcInstance, DP_INTERRUPT_ID,
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(XInterruptHandler)XDptx_HpdInterruptHandler, InstancePtr);
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#else
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Status = XScuGic_Connect(&IntcInstance, DP_INTERRUPT_ID,
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(Xil_InterruptHandler)XDptx_HpdInterruptHandler, InstancePtr);
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#endif /* XPAR_INTC_0_DEVICE_ID */
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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/* Start the interrupt controller. */
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#ifdef XPAR_INTC_0_DEVICE_ID
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Status = XIntc_Start(&IntcInstance, XIN_REAL_MODE);
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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XIntc_Enable(&IntcInstance, DP_INTERRUPT_ID);
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#else
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XScuGic_Enable(&IntcInstance, DP_INTERRUPT_ID);
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#endif /* XPAR_INTC_0_DEVICE_ID */
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/* Initialize the exception table. */
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Xil_ExceptionInit();
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/* Register the interrupt controller handler with the exception table. */
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Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,
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(Xil_ExceptionHandler)INTC_HANDLER, &IntcInstance);
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/* Enable exceptions. */
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Xil_ExceptionEnable();
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return XST_SUCCESS;
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}
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/******************************************************************************/
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/**
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* This function is called when a Hot-Plug-Detect (HPD) event is received by the
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* DisplayPort TX core. The XDPTX_INTERRUPT_STATUS_HPD_EVENT_MASK bit of the
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* core's XDPTX_INTERRUPT_STATUS register indicates that an HPD event has
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* occurred.
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*
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* @param InstancePtr is a pointer to the XDptx instance.
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*
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* @return None.
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*
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* @note Use the XDptx_SetHpdEventHandler driver function to set this
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* function as the handler for HPD pulses.
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*
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*******************************************************************************/
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static void Dptx_HpdEventHandler(void *InstancePtr)
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{
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XDptx *XDptx_InstancePtr = (XDptx *)InstancePtr;
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if (XDptx_IsConnected(XDptx_InstancePtr)) {
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xil_printf("+===> HPD connection event detected.\n");
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Dptx_Run(XDptx_InstancePtr);
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}
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else {
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xil_printf("+===> HPD disconnection event detected.\n\n");
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}
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}
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/******************************************************************************/
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/**
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* This function is called when a Hot-Plug-Detect (HPD) pulse is received by the
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* DisplayPort TX core. The XDPTX_INTERRUPT_STATUS_HPD_PULSE_DETECTED_MASK bit
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* of the core's XDPTX_INTERRUPT_STATUS register indicates that an HPD event has
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* occurred.
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*
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* @param InstancePtr is a pointer to the XDptx instance.
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*
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* @return None.
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*
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* @note Use the XDptx_SetHpdPulseHandler driver function to set this
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* function as the handler for HPD pulses.
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*
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*******************************************************************************/
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static void Dptx_HpdPulseHandler(void *InstancePtr)
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{
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XDptx *XDptx_InstancePtr = (XDptx *)InstancePtr;
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xil_printf("===> HPD pulse detected.\n");
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Dptx_Run(XDptx_InstancePtr);
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}
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/******************************************************************************/
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/**
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* This function is used to override the driver's default sleep functionality.
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* For MicroBlaze systems, the XDptx_WaitUs driver function's default behavior
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* is to use the MB_Sleep function from microblaze_sleep.h, which is implemented
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* in software and only has millisecond accuracy. For this reason, using a
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* hardware timer is preferrable. For ARM/Zynq SoC systems, the SoC's timer is
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* used - XDptx_WaitUs will ignore this custom timer handler.
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*
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* @param InstancePtr is a pointer to the XDptx instance.
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*
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* @return None.
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*
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* @note Use the XDptx_SetUserTimerHandler driver function to set this
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* function as the handler for when the XDptx_WaitUs driver
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* function is called.
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*
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*******************************************************************************/
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static void Dptx_CustomWaitUs(void *InstancePtr, u32 MicroSeconds)
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{
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XDptx *XDptx_InstancePtr = (XDptx *)InstancePtr;
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u32 TimerVal;
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XTmrCtr_Start(XDptx_InstancePtr->UserTimerPtr, 0);
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/* Wait specified number of useconds. */
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do {
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TimerVal = XTmrCtr_GetValue(XDptx_InstancePtr->UserTimerPtr, 0);
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}
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while (TimerVal < (MicroSeconds *
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(XDptx_InstancePtr->Config.SAxiClkHz / 1000000)));
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XTmrCtr_Stop(XDptx_InstancePtr->UserTimerPtr, 0);
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}
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