Pin state is a pin voltage level, not a logic (active-high/low) level

betaflight · Jan 28, 2019 · 06e7a73 · 06e7a73
1 parent 6c8b3a7
commit 06e7a73
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/src/main/drivers/pinio.c b/src/main/drivers/pinio.c
@@ -51,6 +51,11 @@ void pinioInit(const pinioConfig_t *pinioConfig)
 
         switch (pinioConfig->config[i] & PINIO_CONFIG_MODE_MASK) {
         case PINIO_CONFIG_MODE_OUT_PP:
+            // Initial state after reset is input, pull-up.
+            // Avoid momentary off by presetting the output to hi.
+            if (pinioConfig->config[i] & PINIO_CONFIG_OUT_INVERTED) {
+                IOHi(io);
+            }
             IOConfigGPIO(io, IOCFG_OUT_PP);
             break;
         }
@@ -59,12 +64,13 @@ void pinioInit(const pinioConfig_t *pinioConfig)
         {
             pinioRuntime[i].inverted = true;
             IOHi(io);
+            pinioRuntime[i].state = true;
         } else {
             pinioRuntime[i].inverted = false;
             IOLo(io);
+            pinioRuntime[i].state = false;
         }
         pinioRuntime[i].io = io;
-        pinioRuntime[i].state = false;
     }
 }