288 lines
8.4 KiB
C
Executable file
288 lines
8.4 KiB
C
Executable file
/******************************************************************************
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*
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* (c) Copyright 2005-2013 Xilinx, Inc. All rights reserved.
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*
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* This file contains confidential and proprietary information of Xilinx, Inc.
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* and is protected under U.S. and international copyright and other
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* intellectual property laws.
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*
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* DISCLAIMER
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* This disclaimer is not a license and does not grant any rights to the
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* materials distributed herewith. Except as otherwise provided in a valid
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* license issued to you by Xilinx, and to the maximum extent permitted by
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* applicable law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND WITH ALL
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* FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES AND CONDITIONS, EXPRESS,
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* IMPLIED, OR STATUTORY, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
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* MERCHANTABILITY, NON-INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE;
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* and (2) Xilinx shall not be liable (whether in contract or tort, including
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* negligence, or under any other theory of liability) for any loss or damage
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* of any kind or nature related to, arising under or in connection with these
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* materials, including for any direct, or any indirect, special, incidental,
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* or consequential loss or damage (including loss of data, profits, goodwill,
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* or any type of loss or damage suffered as a result of any action brought by
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* a third party) even if such damage or loss was reasonably foreseeable or
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* Xilinx had been advised of the possibility of the same.
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*
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* CRITICAL APPLICATIONS
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* Xilinx products are not designed or intended to be fail-safe, or for use in
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* any application requiring fail-safe performance, such as life-support or
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* safety devices or systems, Class III medical devices, nuclear facilities,
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* applications related to the deployment of airbags, or any other applications
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* that could lead to death, personal injury, or severe property or
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* environmental damage (individually and collectively, "Critical
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* Applications"). Customer assumes the sole risk and liability of any use of
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* Xilinx products in Critical Applications, subject only to applicable laws
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* and regulations governing limitations on product liability.
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*
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* THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS PART OF THIS FILE
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* AT ALL TIMES.
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*
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******************************************************************************/
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/*****************************************************************************/
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/**
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* @file xgpio_tapp_example.c
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*
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* This file contains a example for using GPIO hardware and driver.
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* This example assumes that there is a UART Device or STDIO Device in the
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* hardware system.
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*
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* @note
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*
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* None
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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 sv 04/15/05 Initial release for TestApp integration.
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* 3.00a sv 11/21/09 Updated to use HAL Processor APIs.
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* 3.01a bss 04/18/13 Removed incorrect Documentation lines.(CR #701641)
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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 "stdio.h"
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#include "xstatus.h"
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/************************** Constant Definitions ****************************/
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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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/* following constant is used to determine which channel of the GPIO is
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* used if there are 2 channels supported in the GPIO.
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*/
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#define LED_CHANNEL 1
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#define LED_MAX_BLINK 0x1 /* Number of times the LED Blinks */
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#define GPIO_BITWIDTH 16 /* This is the width of the GPIO */
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#define printf xil_printf /* A smaller footprint printf */
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/*
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* The following constants map to the XPAR parameters created in the
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* xparameters.h file. They are defined here such that a user can easily
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* change all the needed parameters in one place.
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*/
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#ifndef TESTAPP_GEN
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#define GPIO_OUTPUT_DEVICE_ID XPAR_LEDS_4BIT_DEVICE_ID
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#define GPIO_INPUT_DEVICE_ID XPAR_LEDS_4BIT_DEVICE_ID
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#endif /* TESTAPP_GEN */
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/**************************** Type Definitions ******************************/
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/***************** Macros (Inline Functions) Definitions *******************/
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/************************** Function Prototypes ****************************/
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int GpioOutputExample(u16 DeviceId, u32 GpioWidth);
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int GpioInputExample(u16 DeviceId, u32 *DataRead);
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void GpioDriverHandler(void *CallBackRef);
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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 GpioOutput; /* The driver instance for GPIO Device configured as O/P */
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XGpio GpioInput; /* The driver instance for GPIO Device configured as I/P */
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/*****************************************************************************/
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/**
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* Main function to call the example.This function is not included if the
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* example is generated from the TestAppGen test tool.
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*
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* @param None
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*
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* @return XST_SUCCESS if successful, XST_FAILURE if unsuccessful
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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 InputData;
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Status = GpioOutputExample(GPIO_OUTPUT_DEVICE_ID, GPIO_BITWIDTH);
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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Status = GpioInputExample(GPIO_INPUT_DEVICE_ID, &InputData);
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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printf("Data read from GPIO Input is 0x%x \n", (int)InputData);
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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 function does a minimal test on the GPIO device configured as OUTPUT
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* and driver as a example.
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*
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*
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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 GpioWidth is the width of the GPIO
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*
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* @return XST_SUCCESS if successful, XST_FAILURE if unsuccessful
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*
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* @note None
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*
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****************************************************************************/
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int GpioOutputExample(u16 DeviceId, u32 GpioWidth)
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{
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u32 Data;
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volatile int Delay;
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u32 LedBit;
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u32 LedLoop;
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int Status;
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/*
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* Initialize the GPIO driver so that it's ready to use,
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* specify the device ID that is generated in xparameters.h
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*/
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Status = XGpio_Initialize(&GpioOutput, DeviceId);
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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/*
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* Set the direction for all signals to be outputs
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*/
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XGpio_SetDataDirection(&GpioOutput, LED_CHANNEL, 0x0);
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/*
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* Set the GPIO outputs to low
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*/
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XGpio_DiscreteWrite(&GpioOutput, LED_CHANNEL, 0x0);
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for (LedBit = 0x0; LedBit < GpioWidth; LedBit++) {
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for (LedLoop = 0; LedLoop < LED_MAX_BLINK; LedLoop++) {
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/*
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* Set the GPIO Output to High
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*/
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XGpio_DiscreteWrite(&GpioOutput, LED_CHANNEL,
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1 << LedBit);
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#ifndef __SIM__
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/*
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* Wait a small amount of time so the LED is visible
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*/
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for (Delay = 0; Delay < LED_DELAY; Delay++);
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#endif
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/*
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* Clear the GPIO Output
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*/
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XGpio_DiscreteClear(&GpioOutput, LED_CHANNEL,
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1 << LedBit);
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#ifndef __SIM__
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/*
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* Wait a small amount of time so the LED is visible
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*/
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for (Delay = 0; Delay < LED_DELAY; Delay++);
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#endif
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}
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}
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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 function performs a test on the GPIO driver/device with the GPIO
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* configured as INPUT
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*
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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 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 GpioInputExample(u16 DeviceId, u32 *DataRead)
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{
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int Status;
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/*
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* Initialize the GPIO driver so that it's ready to use,
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* specify the device ID that is generated in xparameters.h
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*/
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Status = XGpio_Initialize(&GpioInput, DeviceId);
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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/*
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* Set the direction for all signals to be inputs
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*/
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XGpio_SetDataDirection(&GpioInput, LED_CHANNEL, 0xFFFFFFFF);
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/*
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* Read the state of the data so that it can be verified
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*/
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*DataRead = XGpio_DiscreteRead(&GpioInput, LED_CHANNEL);
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return XST_SUCCESS;
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}
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