lora: add signal handler for gracefull shutdown of spectral scan, otherwise hardware was left in bad state

1 files changed, 53 insertions, 2 deletions

diff --git a/recipes-connectivity/lora/lora-gateway/lora-gateway-spectral-scan-skip-fpga-reset.patch b/recipes-connectivity/lora/lora-gateway/lora-gateway-spectral-scan-skip-fpga-reset.patch
index 6e64ea6..e4a8b2b 100644
--- a/recipes-connectivity/lora/lora-gateway/lora-gateway-spectral-scan-skip-fpga-reset.patch
+++ b/recipes-connectivity/lora/lora-gateway/lora-gateway-spectral-scan-skip-fpga-reset.patch
@@ -2,7 +2,49 @@ diff --git a/util_spectral_scan/src/util_spectral_scan.c b/util_spectral_scan/sr
 index d2aecda..f070f4b 100644
 --- a/util_spectral_scan/src/util_spectral_scan.c
 +++ b/util_spectral_scan/src/util_spectral_scan.c
-@@ -264,7 +264,7 @@ int main( int argc, char ** argv )
+@@ -30,6 +30,7 @@ Maintainer: Michael Coracin
+ #include <stdlib.h>     /* EXIT atoi */
+ #include <unistd.h>     /* getopt */
+ #include <string.h>
++#include <signal.h>
+ 
+ #include "loragw_aux.h"
+ #include "loragw_reg.h"
+@@ -66,11 +67,22 @@ Maintainer: Michael Coracin
+ /* -------------------------------------------------------------------------- */
+ /* --- GLOBAL VARIABLES ----------------------------------------------------- */
+ 
++bool shutdown_signal_recv = false;
++
++void signalHandler() {
++    shutdown_signal_recv = true;
++}
++
++
+ /* -------------------------------------------------------------------------- */
+ /* --- MAIN FUNCTION -------------------------------------------------------- */
+ 
+ int main( int argc, char ** argv )
+ {
++
++    signal(SIGINT, signalHandler);
++    signal(SIGTERM, signalHandler);
++
+     int i, j, k; /* loop and temporary variables */
+     int x; /* return code for functions */
+     int32_t reg_val;
+@@ -200,6 +212,10 @@ int main( int argc, char ** argv )
+         }
+     }
+ 
++    if (shutdown_signal_recv) {
++       return 0;
++    }
++
+     /* Start message */
+     printf("+++ Start spectral scan of LoRa gateway channels +++\n");
+ 
+@@ -264,7 +280,7 @@ int main( int argc, char ** argv )
              printf("ERROR: Failed to disconnect from FPGA\n");
              return EXIT_FAILURE;
          }
@@ -11,4 +53,13 @@ index d2aecda..f070f4b 100644
          if(x != 0) {
              printf("ERROR: Failed to connect to FPGA\n");
              return EXIT_FAILURE;
-
+@@ -382,6 +398,10 @@ int main( int argc, char ** argv )
+         }
+         fprintf(log_file, "\n");
+         printf("\n");
++
++        if (shutdown_signal_recv) {
++            break;
++        }
+     }
+     fclose(log_file);