1 files changed, 29 insertions, 9 deletions

diff --git a/src/Device/Device.cpp b/src/Device/Device.cpp
index 2d93ed7..e743dd6 100644
--- a/src/Device/Device.cpp
+++ b/src/Device/Device.cpp
@@ -703,19 +703,31 @@ unsigned int Device::gpio_request::offset()
  * assume the name is an attribute of the mts-io
  * driver. GPIOs can only be zero
  * or one, never a text string.
+ *
+ * If the data pointer (2nd parm) is not NULL,
+ * return the text of the value.  This covers
+ * non-gpio instances, such as device-id.
  */
 
-int Device::getPinValue(const std::string &name) {
+int Device::getPinValue(const std::string &name, std::string *data)
+{
     std::string fileData;
     if(isupper(name[0])) {
         gpio_request gr(this, name);
         if (gr.request()) {
             enum gpiod_line_value lv = gpiod_line_request_get_value(gr.request(),gr.offset());
             if(lv != GPIOD_LINE_VALUE_ERROR) {
-                if(lv == GPIOD_LINE_VALUE_INACTIVE)
+                if(lv == GPIOD_LINE_VALUE_INACTIVE) {
+		    if(data != NULL)
+			*data = "0";
                     return 0;
-                else
-                    return 1;
+		} else {
+		    if(data != NULL) {
+		        *data = "1";
+                        return 0;
+		    } else
+			return 1;
+		}
             } else
                 simpleError("Invalid GPIO line value", errno, 109);
         }
@@ -723,6 +735,10 @@ int Device::getPinValue(const std::string &name) {
 
     int32_t code = MTS::System::readFile(SYSFS_PLATFORM + name, fileData);
     if (code == 0) {
+	if (data != NULL) {
+	    *data = fileData;
+            return 0;
+	}
         if (fileData == "1") {
             return 1;
         };
@@ -735,11 +751,15 @@ int Device::getPinValue(const std::string &name) {
 }
 
 void Device::show(std::string name) {
+    std::string fileData;
+    int result;
     if (regex_match(hw_version, iotRtrVersionFilters)) {
         showSerialModesMTR3(name);
     }
-    printf("%i", getPinValue(name));
-    exitHandler(0);
+    result = getPinValue(name,&fileData);
+    if (result == 0)
+        printf("%s\n", fileData.c_str());
+    exitHandler(result);
 }  // End of show
 
 void Device::showTrigger(std::string name) {
@@ -943,13 +963,13 @@ void Device::showSerialModesMTR3(const std::string &parameter) {
         printUsage();
     }
     if (mode == SERIAL_MODE) {
-        if (getPinValue(CONTROL_PIN_SERIAL_MODE) == 1) {
+        if (getPinValue(CONTROL_PIN_SERIAL_MODE,NULL) == 1) {
             std::cout << SERIAL_MODE_RS485 << std::endl;
         } else {
             std::cout << SERIAL_MODE_RS232 << std::endl;
         }
     } else if (mode == SERIAL_TERMINATION) {
-        std::cout << getPinValue(CONTROL_PIN_TERMINATION) << std::endl;
+        std::cout << getPinValue(CONTROL_PIN_TERMINATION,NULL) << std::endl;
     } else {
         printError("Unknown mode: %s", mode.c_str());
         exitHandler(98);
@@ -968,4 +988,4 @@ void Device::setHWVersion(){
         return;
     }
     std::getline(is, hw_version);
-}
\ No newline at end of file
+}