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Diffstat (limited to 'meta-steppeeagle/recipes-applications/gpio-test/files/gpio-test.c')
-rw-r--r--meta-steppeeagle/recipes-applications/gpio-test/files/gpio-test.c575
1 files changed, 0 insertions, 575 deletions
diff --git a/meta-steppeeagle/recipes-applications/gpio-test/files/gpio-test.c b/meta-steppeeagle/recipes-applications/gpio-test/files/gpio-test.c
deleted file mode 100644
index 9fc646b1..00000000
--- a/meta-steppeeagle/recipes-applications/gpio-test/files/gpio-test.c
+++ /dev/null
@@ -1,575 +0,0 @@
-/*****************************************************************************
-*
-* Copyright (c) 2014, Advanced Micro Devices, Inc.
-* All rights reserved.
-*
-* Redistribution and use in source and binary forms, with or without
-* modification, are permitted provided that the following conditions are met:
-* * Redistributions of source code must retain the above copyright
-* notice, this list of conditions and the following disclaimer.
-* * Redistributions in binary form must reproduce the above copyright
-* notice, this list of conditions and the following disclaimer in the
-* documentation and/or other materials provided with the distribution.
-* * Neither the name of Advanced Micro Devices, Inc. nor the names of
-* its contributors may be used to endorse or promote products derived
-* from this software without specific prior written permission.
-*
-* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-* DISCLAIMED. IN NO EVENT SHALL ADVANCED MICRO DEVICES, INC. BE LIABLE FOR ANY
-* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
-* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*
-*
-***************************************************************************/
-#include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <errno.h>
-#include <string.h>
-
-#include <readline/readline.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <sys/ioctl.h>
-
-#include "gpio-test.h"
-
-#define GPIO_APP_VERSION "0.1"
-#define AMD_GPIO_NUM_PINS 184
-static int gpio_in_use[AMD_GPIO_NUM_PINS];
-
-char *show_prompt(void)
-{
- return "$ ";
-}
-
-void sighandler(int sig)
-{
- printf("\n%s", show_prompt());
-}
-
-void show_license(void)
-{
- printf("/*****************************************************************************\n"
- "*\n"
- "* Copyright (c) 2014, Advanced Micro Devices, Inc.\n"
- "* All rights reserved.\n"
- "*\n"
- "* Redistribution and use in source and binary forms, with or without\n"
- "* modification, are permitted provided that the following conditions are met:\n"
- "* * Redistributions of source code must retain the above copyright\n"
- "* notice, this list of conditions and the following disclaimer.\n"
- "* * Redistributions in binary form must reproduce the above copyright\n"
- "* notice, this list of conditions and the following disclaimer in the\n"
- "* documentation and/or other materials provided with the distribution.\n"
- "* * Neither the name of Advanced Micro Devices, Inc. nor the names of\n"
- "* its contributors may be used to endorse or promote products derived\n"
- "* from this software without specific prior written permission.\n"
- "*\n"
- "* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\" AND\n"
- "* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\n"
- "* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\n"
- "* DISCLAIMED. IN NO EVENT SHALL ADVANCED MICRO DEVICES, INC. BE LIABLE FOR ANY\n"
- "* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES\n"
- "* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\n"
- "* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND\n"
- "* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n"
- "* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS\n"
- "* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n"
- "*\n"
- "*\n"
- "***************************************************************************/\n");
-}
-
-void print_usage()
-{
- printf("\nCommands Supported ->\n");
- printf(" getgpiomode <gpio> : Gets the mode of GPIO pin\n");
- printf(" setgpiomode <gpio> <in/out/high/low> : Sets the mode of GPIO pin to input or output(high/low)\n");
- printf(" getgpiovalue <gpio> : Gets the value of GPIO pin\n");
- printf(" setgpiovalue <gpio> <high/low> : Sets the value of GPO pin to high or low\n");
- printf(" getnumgpio : Gets the number of GPIO pins supported\n");
- printf(" getgpiobase : Gets the number of first GPIO pin\n");
- printf(" getgpioname : Gets the name of GPIO driver currently in use\n");
- printf(" dmesg : Displays the kernel log messages related to GPIO\n");
- printf(" license : Displays the terms of LICENSE for this application\n");
- printf(" help : Displays help text\n");
- printf(" exit : Exits the application\n\n");
-}
-
-void parse_cmd(const char *cmdline)
-{
- int fd;
-
- if ((cmdline == NULL) || (strncmp(cmdline, "exit", 4) == 0)) {
- int i;
- int ret;
- char gpio[3 + 1];
-
- printf("\nExiting...\n");
-
- /* We need to unexport all the GPIO pins exported earlier */
- for (i = 0; i < AMD_GPIO_NUM_PINS; i++) {
- if (gpio_in_use[i]) {
- int fd;
-
- fd = open("/sys/class/gpio/unexport", O_WRONLY);
- if (fd < 0) {
- printf("\nPlease make sure AMD GPIO driver is loaded\n");
- exit(EXIT_FAILURE);
- }
- memset(gpio, '\0', (3 + 1));
- snprintf(gpio, 4, "%d", i);
-
- ret = write(fd, gpio, strlen(gpio));
- if (ret < 0)
- perror("Error writing to /sys/class/gpio/unexport");
- }
- }
-
- exit(EXIT_SUCCESS);
- } else if (strncmp(cmdline, "help", 4) == 0)
- print_usage();
- else if (strncmp(cmdline, "getnumgpio", 10) == 0) {
- int fd;
- char ngpio[3 + 1];
-
- memset(ngpio, '\0', (3 + 1));
- fd = open("/sys/class/gpio/gpiochip0/ngpio", O_RDONLY);
- if (fd < 0) {
- printf("\nPlease make sure AMD GPIO driver is loaded\n");
- exit(EXIT_FAILURE);
- }
-
- /* Value read from the file is ASCII text */
- if(read(fd, ngpio, 3) < 0)
- perror("Cannot read number of GPIO pins");
-
- printf("\nThe maximum number of GPIO pins supported is %d\n", atoi(ngpio));
- close(fd);
- } else if (strncmp(cmdline, "getgpiobase", 11) == 0) {
- int fd;
- char gpiobase[3 + 1];
-
- memset(gpiobase, '\0', (3 + 1));
- fd = open("/sys/class/gpio/gpiochip0/base", O_RDONLY);
- if (fd < 0) {
- printf("\nPlease make sure AMD GPIO driver is loaded\n");
- exit(EXIT_FAILURE);
- }
-
- if(read(fd, gpiobase, 3) < 0)
- perror("Cannot read GPIO base");
-
- printf("\nGPIO pin numbering starts from %d\n", atoi(gpiobase));
- close(fd);
- } else if (strncmp(cmdline, "getgpioname", 11) == 0) {
- int fd;
- char gpioname[10 + 1]; /* Max 10 characters + NULL character */
-
- /* Zero initialize gpioname array */
- memset(gpioname, '\0', sizeof(gpioname));
-
- fd = open("/sys/class/gpio/gpiochip0/label", O_RDONLY);
- if (fd < 0) {
- printf("\nPlease make sure AMD GPIO driver is loaded\n");
- exit(EXIT_FAILURE);
- }
-
- if(read(fd, gpioname, 10) < 0)
- perror("Cannot read GPIO driver name");
-
- printf("\nGPIO driver loaded is %s\n", gpioname);
- close(fd);
- } else if (strncmp(cmdline, "getgpiovalue", 12) == 0) {
- int fd;
- int gpio;
- const char *charp = cmdline;
- char pathname[80];
- int ret = 0;
-
- /* Lets point to the end of first token */
- charp += strlen("getgpiovalue");
- /* Skip blank characters */
- while (*charp == ' ' || *charp == '\t' || *charp == '\n')
- charp++;
-
- /* Now we should be pointing to the first 'digit' character */
- gpio = atoi(charp);
-
- fd = open("/sys/class/gpio/export", O_WRONLY);
- if (fd < 0) {
- if (errno == EACCES)
- printf("\nYou do not have correct permission, please run as root\n");
- else
- perror("Eror opening /sys/class/gpio/export");
-
- exit(EXIT_FAILURE);
- }
-
- ret = write(fd, charp, strlen(charp));
- /*
- * There can be two situations ->
- * 1) The GPIO is being exported for the first time.
- * 2) The GPIO is being exported again.
- * In the first case, the write to file descriptor should
- * succeed, and we should still fall into the if clause.
- *
- * In the second case, write will fail and errno will be
- * set to EBUSY, since the GPIO pin is already exported.
- * Rest all is error.
- */
- if((ret >= 0) || ((ret < 0) && (errno == EBUSY))) {
- /* Close the last file descriptor */
- close(fd);
-
- memset(pathname, '\0', sizeof(pathname));
- sprintf(pathname, "/sys/class/gpio/gpio%d/value", gpio);
-
- fd = open(pathname, O_RDONLY);
- if (fd < 0)
- perror("GPIO read error");
- else {
- char value[1 + 1];
-
- memset(value, '\0', 2);
- ret = read(fd, value, 1);
- if (ret < 0)
- perror("Cannot read GPIO pin");
-
- printf("\nGPIO pin %s is at \"%s\"\n", charp,
- (strncmp(value, "1", 1) == 0) ? "high" : "low");
-
- close(fd);
-
- /*
- * Mark the GPIO as already exported, so that we can use
- * unexport them during exit.
- */
- gpio_in_use[gpio] = 1;
- }
- } else {
- if (errno == EINVAL)
- printf("\nInvalid GPIO number\n");
- else
- perror("Error exporting GPIO number");
-
- close(fd);
- }
- } else if (strncmp(cmdline, "getgpiomode", 11) == 0) {
- int fd;
- int gpio;
- const char *charp = cmdline;
- char pathname[80];
- int ret = 0;
-
- /* Lets point to the end of first token */
- charp += strlen("getgpiomode");
- /* Skip blank characters */
- while (*charp == ' ' || *charp == '\t' || *charp == '\n')
- charp++;
-
- /* Now we should be pointing to the first 'digit' character */
- gpio = atoi(charp);
-
- fd = open("/sys/class/gpio/export", O_WRONLY);
- if (fd < 0) {
- if (errno == EACCES)
- printf("\nYou do not have correct permission, please run as root\n");
- else
- perror("Eror opening /sys/class/gpio/export");
-
- exit(EXIT_FAILURE);
- }
-
- ret = write(fd, charp, strlen(charp));
- /*
- * There can be two situations ->
- * 1) The GPIO is being exported for the first time.
- * 2) The GPIO is being exported again.
- * In the first case, the write to file descriptor should
- * succeed, and we should still fall into the if clause.
- *
- * In the second case, write will fail and errno will be
- * set to EBUSY, since the GPIO pin is already exported.
- * Rest all is error.
- */
- if((ret >= 0) || ((ret < 0) && (errno == EBUSY))) {
- FILE *fp;
-
- /* Close the last file descriptor */
- close(fd);
-
- memset(pathname, '\0', sizeof(pathname));
- sprintf(pathname, "/sys/class/gpio/gpio%d/direction", gpio);
-
- fp = fopen(pathname, "r");
- if (fp == NULL)
- perror("GPIO read error");
- else {
- char mode[3 + 1];
- int c, i = 0;
-
- memset(mode, '\0', (3 + 1));
- /*
- * Since we do not exactly know whether the
- * direction will be 'in' or 'out', we need to
- * use fgetc() so that we read the input till
- * we find terminating '\n', at which point
- * we stop reading any further.
- */
- while ((c = fgetc(fp)) != '\n')
- mode[i++] = c;
-
- printf("\nGPIO pin %s is in \"%s\" mode\n", charp,
- (strncmp(mode, "in", 2) == 0) ? "input" : "output");
-
- fclose(fp);
-
- /*
- * Mark the GPIO as already exported, so that we can use
- * unexport them during exit.
- */
- gpio_in_use[gpio] = 1;
- }
- } else {
- if (errno == EINVAL)
- printf("\nInvalid GPIO number\n");
- else
- perror("Error exporting GPIO number");
-
- close(fd);
- }
- } else if (strncmp(cmdline, "setgpiomode", 11) == 0) {
- int fd;
- const char *charp = cmdline;
- int i = 0;
- char gpio[3 + 1];
- int ngpio;
- int ret;
-
- charp += strlen("setgpiomode");
- while (*charp == ' ' || *charp == '\t' || *charp == '\n')
- charp++;
-
- memset(gpio, '\0', (3 + 1));
- /*
- * We are at the start of string which contains the GPIO
- * number. We look for the end of this string, copying
- * byte by byte into array. We also make sure that we
- * do not store more than 3 bytes into the array, since
- * a GPIO can have a maximum value of 183, that is, not
- * exceeding 3 characters.
- */
- while (*charp != ' ' && *charp != '\t' && (i < 3)) {
- gpio[i++] = *charp;
- charp++;
- }
-
- ngpio = atoi(gpio);
-
- fd = open("/sys/class/gpio/export", O_WRONLY);
- if (fd < 0) {
- if (errno == EACCES)
- printf("\nYou do not have correct permission, please run as root\n");
- else
- perror("Eror opening /sys/class/gpio/export");
-
- exit(EXIT_FAILURE);
- }
-
- ret = write(fd, gpio, strlen(gpio));
- if((ret >= 0) || ((ret < 0) && (errno == EBUSY))) {
- char pathname[80];
-
- /* Close the last file descriptor */
- close(fd);
-
- memset(pathname, '\0', sizeof(pathname));
- sprintf(pathname, "/sys/class/gpio/gpio%d/direction", ngpio);
-
- fd = open(pathname, O_WRONLY);
- if (fd < 0)
- perror("GPIO read error");
- else {
- char mode[4 + 1];
-
- memset(mode, '\0', (4 + 1));
-
- /* Lets skip the blanks till we find a character */
- while (*charp == ' ' || *charp == '\t')
- charp++;
-
- i = 0;
- /*
- * Mode can be 'in', 'out', 'high' or 'low',
- * again a maximum of 4 characters.
- */
- while (*charp != ' ' && *charp != '\t' && (i < 4)) {
- mode[i++] = *charp;
- charp++;
- }
-
- /* Sanity check */
- if ((strncmp(mode, "in", 2) == 0) ||
- (strncmp(mode, "out", 3) == 0) ||
- (strncmp(mode, "high", 4) == 0) ||
- (strncmp(mode, "low", 3) == 0)) {
- /* Write mode into /sys/.../direction file */
- ret = write(fd, mode, strlen(mode));
- if (ret < 0)
- perror("Error writing GPIO mode");
- } else
- printf("\nInvalid GPIO mode, please try again\n");
-
- close(fd);
-
- /*
- * Mark the GPIO as exported, so that we can use
- * unexport them during exit.
- */
- gpio_in_use[ngpio] = 1;
- }
- } else {
- if (errno == EINVAL)
- printf("\nInvalid GPIO number\n");
- else
- perror("Error exporting GPIO number");
-
- close(fd);
- }
- } else if (strncmp(cmdline, "setgpiovalue", 12) == 0) {
- int fd;
- const char *charp = cmdline;
- int i = 0;
- char gpio[3 + 1];
- int ngpio;
- int ret;
-
- charp += strlen("setgpiovalue");
- while (*charp == ' ' || *charp == '\t' || *charp == '\n')
- charp++;
-
- memset(gpio, '\0', (3 + 1));
- /*
- * We are at the start of string which contains the GPIO
- * number. We look for the end of this string, copying
- * byte by byte into array. We also make sure that we
- * do not store more than 3 bytes into the array, since
- * a GPIO can have a maximum value of 183, that is, not
- * exceeding 3 characters.
- */
- while (*charp != ' ' && *charp != '\t' && (i < 3)) {
- gpio[i++] = *charp;
- charp++;
- }
-
- ngpio = atoi(gpio);
-
- fd = open("/sys/class/gpio/export", O_WRONLY);
- if (fd < 0) {
- if (errno == EACCES)
- printf("\nYou do not have correct permission, please run as root\n");
- else
- perror("Eror opening /sys/class/gpio/export");
-
- exit(EXIT_FAILURE);
- }
-
- ret = write(fd, gpio, strlen(gpio));
- if((ret >= 0) || ((ret < 0) && (errno == EBUSY))) {
- char pathname[80];
-
- /* Close the last file descriptor */
- close(fd);
-
- memset(pathname, '\0', sizeof(pathname));
- sprintf(pathname, "/sys/class/gpio/gpio%d/value", ngpio);
-
- fd = open(pathname, O_WRONLY);
- if (fd < 0)
- perror("GPIO read error");
- else {
- char value[1 + 1];
-
- memset(value, '\0', (1 + 1));
-
- /* Lets skip the blanks till we find a character */
- while (*charp == ' ' || *charp == '\t')
- charp++;
-
- i = 0;
-
- if (strncmp(charp, "high", 4) == 0)
- value[0] = '1';
- else if (strncmp(charp, "low", 3) == 0)
- value[0] = '0';
- else {
- printf("\nInvalid input, please try again...\n");
- goto out;
- }
-
- /* Write mode into /sys/.../direction file */
- ret = write(fd, value, 1);
- if (ret < 0)
- perror("Error writing GPIO mode");
-
-out:
- close(fd);
-
- /*
- * Mark the GPIO as exported, so that we can use
- * unexport them during exit.
- */
- gpio_in_use[ngpio] = 1;
- }
- } else {
- if (errno == EINVAL)
- printf("\nInvalid GPIO number\n");
- else
- perror("Error exporting GPIO number");
-
- close(fd);
- }
- } else if (strncmp(cmdline, "dmesg", 5) == 0) {
- if (system("dmesg | grep GPIO") < 0)
- perror("Error executing \'dmesg | grep GPIO\'");
- } else if (strncmp(cmdline, "license", 7) == 0) {
- show_license();
- } else {
- printf("\nUnknown command\n");
- print_usage();
- }
-}
-
-int main(void)
-{
- char *cmdline= NULL;
-
- printf("GPIO sample application version: %s\n", GPIO_APP_VERSION);
- printf("Copyright (c) 2014, Advanced Micro Devices, Inc.\n"
- "This sample application comes with ABSOLUTELY NO WARRANTY;\n"
- "This is free software, and you are welcome to redistribute it\n"
- "under certain conditions; type `license' for details.\n\n");
-
- /* Handler for Ctrl+C */
- signal(SIGINT, sighandler);
-
- while (1) {
- cmdline = readline(show_prompt());
- parse_cmd(cmdline);
- /* Free the memory malloc'ed by readline */
- free(cmdline);
- }
-
- /* Should never reach here */
- return 0;
-}