adcapp
This is a tool to read all the available ADC channels.
A raw value is read from each of the channels.
Updated LICENSE file to cover all source files and
removed file specific licenses at the top of some
of the files.
Signed-off-by: Hongwei Zhang <hongweiz@ami.com>
Change-Id: I3c1b389c0d91bccfc3ee93bccfe04137d7ea9960
Signed-off-by: Kiran Kumar <kirank@ami.com>
diff --git a/hongweiz/adcapp/src/adcifc.c b/hongweiz/adcapp/src/adcifc.c
new file mode 100644
index 0000000..9627b28
--- /dev/null
+++ b/hongweiz/adcapp/src/adcifc.c
@@ -0,0 +1,88 @@
+ /*****************************************************************
+ *
+ * adcapp.c
+ * Simple interface to read and write adc.
+ *
+ * Author: Rama Rao Bisa <ramab@ami.com>
+ *
+ * Copyright (C) <2019> <American Megatrends International LLC>
+ *
+ *****************************************************************/
+
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+#include <string.h>
+#include <stdint.h>
+#include "adc.h"
+#include "adcifc.h"
+#include "EINTR_wrappers.h"
+
+/** \file adcifc.c
+ \brief Source for all adc interface code
+ */
+
+static int adc_directory_check()
+{
+ int retval = 0;
+ struct stat sb;
+ if (!(stat("/sys/bus/iio/devices/iio:device0", &sb) == 0 && S_ISDIR(sb.st_mode)))
+ {
+ printf("\"/sys/bus/iio/devices/iio:device0\" is not exist!\n");
+ retval = -1;
+ }
+ return retval;
+}
+
+static int sys_get_adc_vol( get_adc_value_t *argp )
+{
+ int retval = -1;
+ int fd;
+ int tmp;
+ char stringArray[50];
+ char val[5];
+ if(argp->channel_num > 15) retval = -1;
+ retval = adc_directory_check();
+ if(retval != 0)
+ {
+ return retval;
+ }
+ snprintf(stringArray, sizeof(stringArray), "%s%s%d%s", "/sys/bus/iio/devices/iio:device0","/in_voltage", argp->channel_num,"_raw");
+ retval = access(stringArray,F_OK);
+ if(retval != 0)
+ {
+ return retval;
+ }
+ fd = sigwrap_open(stringArray, O_RDONLY);
+ if (fd < 0) {
+ return fd;
+ }
+ read(fd, val, 5);
+ tmp = atoi(val);
+ (void)sigwrap_close(fd);
+ argp->channel_value = (uint16_t)(tmp);
+ retval = 0;
+ return( retval );
+}
+
+/**
+ * get_adc_val
+ *
+ **/
+int get_adc_val( int channel , unsigned short *data)
+{
+ get_adc_value_t adc_arg;
+
+ /* Set the adc channel to read */
+ adc_arg.channel_num = channel;
+ adc_arg.channel_value = 0;
+
+ if ( -1 == sys_get_adc_vol(&adc_arg)) { return -1; }
+ *data = (unsigned short)(adc_arg.channel_value);
+
+ return ( 0 );
+}