Set GP7 to high impedance for a good measure

webhdx · Aug 11, 2024 · 724307a · 724307a
1 parent afaa417
commit 724307a
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/src/picoboot.c b/src/picoboot.c
@@ -14,7 +14,8 @@
 #include "picoboot.pio.h"
 #include "endian.h"
 
-const uint PIN_LED = 25;                // Status LED
+const uint PIN_LED = 25;                    // Status LED
+const uint PIN_LEGACY_DI = 7;
 
 extern const uint32_t __payload[];
 extern const uint32_t __payload_end[];
@@ -58,6 +59,11 @@ void main()
     gpio_set_dir(PIN_LED, GPIO_OUT);
     gpio_put(PIN_LED, true);
 
+    // set legacy DI pin GP7 to high impedance state
+    gpio_init(PIN_LEGACY_DI); 
+    gpio_set_dir(PIN_LEGACY_DI, GPIO_IN);
+    gpio_disable_pulls(PIN_LEGACY_DI);
+
     size_t payload_size = validate_payload();
     if (payload_size == SIZE_MAX) {
         while (true) {