actually do something in infinite loop

1 files changed, 18 insertions, 17 deletions

diff --git a/anzeige.c b/anzeige.c
index 73b7041..cf83f25 100644
--- a/anzeige.c
+++ b/anzeige.c
@@ -53,7 +53,7 @@ volatile unsigned *gpio;
 
 void setup_io();
 void drop_privileges();
-void put_on_display(char *content);
+void *put_on_display(void *content);
 
 void printButton(int g)
 {
@@ -65,7 +65,7 @@ void printButton(int g)
 
 int main(int argc, char **argv)
 {
-  int thread_id;
+  pthread_t thread_id;
   char *content;
 
   // Set up gpi pointer for direct register access
@@ -155,7 +155,7 @@ void drop_privileges()
 //
 // Shift the bits provided in content into the display
 //
-void put_on_display(char *content)
+void *put_on_display(void *content)
 {
    char *raw_output;
    int line;
@@ -167,22 +167,23 @@ void put_on_display(char *content)
    }
    for (line=0; line<7; line++) {
       raw_output[line*6] = 1<<line;
-      memmove(raw_output+1+6*line,content+5*line,5);
+      memmove(raw_output+1+6*line,((char*)content)+5*line,5);
    }
-   while (1);
-   for (line=0; line<7; line++) {
-      GPIO_CLR = 1<<GATE_PIN; // Licht an
-      for (int byte=0; byte<6; byte++) {
-         for (int bit=0; bit<8; bit++) {
-            GPIO_CLR = 1<<SER_CLK_PIN;
-            GPIO_ALTER((*(raw_output+6*line+byte)>>bit) & 0x01) = 1<<SER_DAT_PIN;
-            GPIO_SET = 1<<SER_CLK_PIN;
+   while (1)
+      for (line=0; line<7; line++) {
+         GPIO_CLR = 1<<GATE_PIN; // Licht an
+         for (int byte=0; byte<6; byte++) {
+            for (int bit=0; bit<8; bit++) {
+               GPIO_CLR = 1<<SER_CLK_PIN;
+               GPIO_ALTER((*(raw_output+6*line+byte)>>bit) & 0x01) = 1<<SER_DAT_PIN;
+               GPIO_SET = 1<<SER_CLK_PIN;
+            }
          }
+         usleep(1000);
+         GPIO_SET = 1<<GATE_PIN; // Licht aus
+         GPIO_CLR = 1<<PAR_CLK_PIN;
+         GPIO_SET = 1<<PAR_CLK_PIN;
       }
-      usleep(1000);
-      GPIO_SET = 1<<GATE_PIN; // Licht aus
-      GPIO_CLR = 1<<PAR_CLK_PIN;
-      GPIO_SET = 1<<PAR_CLK_PIN;
-   }
    free(raw_output);
+   return NULL;
 } // put_on_screen