2c8f92039d
Added initial support Xilinx Embedded Software. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
434 lines
13 KiB
C
Executable file
434 lines
13 KiB
C
Executable file
/******************************************************************************
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*
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* Copyright (C) 2002 - 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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* @file xgpio_intr_tapp_example.c
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*
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* This file contains a design example using the GPIO driver (XGpio) in an
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* interrupt driven mode of operation. This example does assume that there is
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* an interrupt controller in the hardware system and the GPIO device is
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* connected to the interrupt controller.
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*
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* This file is used by the TestAppGen utility to include a simplified test for
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* gpio interrupts.
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* The buttons and LEDs are on 2 seperate channels of the GPIO so that interrupts
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* are not caused when the LEDs are turned on and off.
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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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* 2.01a sn 05/09/06 Modified to be used by TestAppGen to include test for
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* interrupts.
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* 3.00a ktn 11/21/09 Updated to use HAL Processor APIs and minior changes
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* as per coding guidelines.
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* 3.00a sdm 02/16/11 Updated to support ARM Generic Interrupt Controller
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*</pre>
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*
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******************************************************************************/
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/***************************** Include Files *********************************/
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#include "xparameters.h"
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#include "xgpio.h"
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#include "xil_exception.h"
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#ifdef XPAR_INTC_0_DEVICE_ID
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#include "xintc.h"
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#include <stdio.h>
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#else
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#include "xscugic.h"
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#include "xil_printf.h"
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#endif
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/************************** Constant Definitions *****************************/
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#ifndef TESTAPP_GEN
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/*
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* The following constants map to the names of the hardware instances that
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* were created in the EDK XPS system. They are only defined here such that
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* a user can easily change all the needed device IDs in one place.
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*/
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#define GPIO_DEVICE_ID XPAR_PUSH_BUTTONS_4BITS_DEVICE_ID
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#define INTC_GPIO_INTERRUPT_ID XPAR_INTC_0_GPIO_2_VEC_ID
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#define GPIO_CHANNEL1 1
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#ifdef XPAR_INTC_0_DEVICE_ID
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#define INTC_DEVICE_ID XPAR_INTC_0_DEVICE_ID
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#else
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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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/*
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* The following constants define the positions of the buttons and LEDs each
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* channel of the GPIO
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*/
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#define GPIO_ALL_LEDS 0xFFFF
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#define GPIO_ALL_BUTTONS 0xFFFF
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/*
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* The following constants define the GPIO channel that is used for the buttons
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* and the LEDs. They allow the channels to be reversed easily.
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*/
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#define BUTTON_CHANNEL 1 /* Channel 1 of the GPIO Device */
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#define LED_CHANNEL 2 /* Channel 2 of the GPIO Device */
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#define BUTTON_INTERRUPT XGPIO_IR_CH1_MASK /* Channel 1 Interrupt Mask */
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/*
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* The following constant determines which buttons must be pressed at the same
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* time to cause interrupt processing to stop and start
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*/
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#define INTERRUPT_CONTROL_VALUE 0x7
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/*
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* The following constant is used to wait after an LED is turned on to make
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* sure that it is visible to the human eye. This constant might need to be
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* tuned for faster or slower processor speeds.
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*/
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#define LED_DELAY 1000000
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#endif /* TESTAPP_GEN */
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#define INTR_DELAY 0x00FFFFFF
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#ifdef XPAR_INTC_0_DEVICE_ID
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#define INTC_DEVICE_ID 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_DEVICE_ID XPAR_SCUGIC_SINGLE_DEVICE_ID
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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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void GpioHandler(void *CallBackRef);
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int GpioIntrExample(INTC *IntcInstancePtr, XGpio *InstancePtr,
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u16 DeviceId, u16 IntrId,
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u16 IntrMask, u32 *DataRead);
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int GpioSetupIntrSystem(INTC *IntcInstancePtr, XGpio *InstancePtr,
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u16 DeviceId, u16 IntrId, u16 IntrMask);
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void GpioDisableIntr(INTC *IntcInstancePtr, XGpio *InstancePtr,
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u16 IntrId, u16 IntrMask);
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/************************** Variable Definitions *****************************/
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/*
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* The following are declared globally so they are zeroed and so they are
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* easily accessible from a debugger
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*/
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XGpio Gpio; /* The Instance of the GPIO Driver */
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INTC Intc; /* The Instance of the Interrupt Controller Driver */
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static u16 GlobalIntrMask; /* GPIO channel mask that is needed by
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* the Interrupt Handler */
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static volatile u32 IntrFlag; /* Interrupt Handler Flag */
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/****************************************************************************/
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/**
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* This function is the main function of the GPIO example. It is responsible
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* for initializing the GPIO device, setting up interrupts and providing a
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* foreground loop such that interrupt can occur in the background.
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*
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* @param None.
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*
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* @return
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* - XST_SUCCESS to indicate success.
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* - XST_FAILURE to indicate failure.
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*
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* @note None.
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*
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*****************************************************************************/
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#ifndef TESTAPP_GEN
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int main(void)
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{
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int Status;
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u32 DataRead;
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print(" Press button to Generate Interrupt\r\n");
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Status = GpioIntrExample(&Intc, &Gpio,
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GPIO_DEVICE_ID,
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INTC_GPIO_INTERRUPT_ID,
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GPIO_CHANNEL1, &DataRead);
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if (Status == 0 ){
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if(DataRead == 0)
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print("No button pressed. \r\n");
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else
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print("Gpio Interrupt Test PASSED. \r\n");
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} else {
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print("Gpio Interrupt Test FAILED.\r\n");
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return XST_FAILURE;
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}
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return XST_SUCCESS;
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}
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#endif
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/******************************************************************************/
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/**
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*
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* This is the entry function from the TestAppGen tool generated application
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* which tests the interrupts when enabled in the GPIO
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*
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* @param IntcInstancePtr is a reference to the Interrupt Controller
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* driver Instance
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* @param InstancePtr is a reference to the GPIO driver Instance
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* @param DeviceId is the XPAR_<GPIO_instance>_DEVICE_ID value from
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* xparameters.h
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* @param IntrId is XPAR_<INTC_instance>_<GPIO_instance>_IP2INTC_IRPT_INTR
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* value from xparameters.h
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* @param IntrMask is the GPIO channel mask
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* @param DataRead is the pointer where the data read from GPIO Input is
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* returned
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*
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* @return XST_SUCCESS if the Test is successful, otherwise XST_FAILURE
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*
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* @note None.
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*
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******************************************************************************/
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int GpioIntrExample(INTC *IntcInstancePtr, XGpio* InstancePtr, u16 DeviceId,
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u16 IntrId, u16 IntrMask, u32 *DataRead)
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{
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int Status;
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u32 delay;
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/* Initialize the GPIO driver. If an error occurs then exit */
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Status = XGpio_Initialize(InstancePtr, DeviceId);
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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Status = GpioSetupIntrSystem(IntcInstancePtr, InstancePtr, DeviceId,
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IntrId, IntrMask);
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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IntrFlag = 0;
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delay = 0;
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while(!IntrFlag && (delay < INTR_DELAY)) {
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delay++;
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}
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GpioDisableIntr(IntcInstancePtr, InstancePtr, IntrId, IntrMask);
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*DataRead = IntrFlag;
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return Status;
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}
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/******************************************************************************/
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/**
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*
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* This function performs the GPIO set up for Interrupts
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*
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* @param IntcInstancePtr is a reference to the Interrupt Controller
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* driver Instance
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* @param InstancePtr is a reference to the GPIO driver Instance
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* @param DeviceId is the XPAR_<GPIO_instance>_DEVICE_ID value from
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* xparameters.h
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* @param IntrId is XPAR_<INTC_instance>_<GPIO_instance>_IP2INTC_IRPT_INTR
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* value from xparameters.h
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* @param IntrMask is the GPIO channel mask
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*
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* @return XST_SUCCESS if the Test is successful, otherwise XST_FAILURE
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*
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* @note None.
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*
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******************************************************************************/
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int GpioSetupIntrSystem(INTC *IntcInstancePtr, XGpio *InstancePtr,
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u16 DeviceId, u16 IntrId, u16 IntrMask)
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{
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int Result;
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GlobalIntrMask = IntrMask;
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#ifdef XPAR_INTC_0_DEVICE_ID
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#ifndef TESTAPP_GEN
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/*
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* Initialize the interrupt controller driver so that it's ready to use.
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* specify the device ID that was generated in xparameters.h
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*/
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Result = XIntc_Initialize(IntcInstancePtr, INTC_DEVICE_ID);
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if (Result != XST_SUCCESS) {
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return Result;
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}
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#endif /* TESTAPP_GEN */
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/* Hook up interrupt service routine */
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XIntc_Connect(IntcInstancePtr, IntrId,
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(Xil_ExceptionHandler)GpioHandler, InstancePtr);
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/* Enable the interrupt vector at the interrupt controller */
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XIntc_Enable(IntcInstancePtr, IntrId);
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#ifndef TESTAPP_GEN
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/*
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* Start the interrupt controller such that interrupts are recognized
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* and handled by the processor
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*/
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Result = XIntc_Start(IntcInstancePtr, XIN_REAL_MODE);
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if (Result != XST_SUCCESS) {
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return Result;
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}
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#endif /* TESTAPP_GEN */
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#else /* !XPAR_INTC_0_DEVICE_ID */
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#ifndef TESTAPP_GEN
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XScuGic_Config *IntcConfig;
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/*
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* Initialize the interrupt controller driver so that it is ready to
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* use.
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*/
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IntcConfig = XScuGic_LookupConfig(INTC_DEVICE_ID);
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if (NULL == IntcConfig) {
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return XST_FAILURE;
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}
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Result = XScuGic_CfgInitialize(IntcInstancePtr, IntcConfig,
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IntcConfig->CpuBaseAddress);
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if (Result != XST_SUCCESS) {
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return XST_FAILURE;
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}
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#endif /* TESTAPP_GEN */
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XScuGic_SetPriorityTriggerType(IntcInstancePtr, IntrId,
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0xA0, 0x3);
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/*
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* Connect the interrupt handler that will be called when an
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* interrupt occurs for the device.
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*/
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Result = XScuGic_Connect(IntcInstancePtr, IntrId,
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(Xil_ExceptionHandler)GpioHandler, InstancePtr);
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if (Result != XST_SUCCESS) {
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return Result;
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}
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/*
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* Enable the interrupt for the GPIO device.
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*/
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XScuGic_Enable(IntcInstancePtr, IntrId);
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#endif /* XPAR_INTC_0_DEVICE_ID */
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/*
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* Enable the GPIO channel interrupts so that push button can be
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* detected and enable interrupts for the GPIO device
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*/
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XGpio_InterruptEnable(InstancePtr, IntrMask);
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XGpio_InterruptGlobalEnable(InstancePtr);
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/*
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* Initialize the exception table and register the interrupt
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* controller handler with the exception table
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*/
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Xil_ExceptionInit();
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Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,
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(Xil_ExceptionHandler)INTC_HANDLER, IntcInstancePtr);
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/* Enable non-critical 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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*
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* This is the interrupt handler routine for the GPIO for this example.
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*
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* @param CallbackRef is the Callback reference for the handler.
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*
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* @return None.
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*
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* @note None.
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*
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******************************************************************************/
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void GpioHandler(void *CallbackRef)
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{
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XGpio *GpioPtr = (XGpio *)CallbackRef;
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IntrFlag = 1;
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/*
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* Clear the Interrupt
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*/
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XGpio_InterruptClear(GpioPtr, GlobalIntrMask);
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}
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/******************************************************************************/
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/**
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*
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* This function disables the interrupts for the GPIO
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*
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* @param IntcInstancePtr is a pointer to the Interrupt Controller
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* driver Instance
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* @param InstancePtr is a pointer to the GPIO driver Instance
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* @param IntrId is XPAR_<INTC_instance>_<GPIO_instance>_IP2INTC_IRPT_INTR
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* value from xparameters.h
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* @param IntrMask is the GPIO channel mask
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*
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* @return None
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*
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* @note None.
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*
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******************************************************************************/
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void GpioDisableIntr(INTC *IntcInstancePtr, XGpio *InstancePtr,
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u16 IntrId, u16 IntrMask)
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{
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XGpio_InterruptDisable(InstancePtr, IntrMask);
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#ifdef XPAR_INTC_0_DEVICE_ID
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XIntc_Disable(IntcInstancePtr, IntrId);
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#else
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/* Disconnect the interrupt */
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XScuGic_Disable(IntcInstancePtr, IntrId);
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XScuGic_Disconnect(IntcInstancePtr, IntrId);
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#endif
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return;
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}
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