1 files changed, 24 insertions, 15 deletions

diff --git a/fdl/ch573/gpio.fdl b/fdl/ch573/gpio.fdl
index 86ffaef..e4fbb69 100644
--- a/fdl/ch573/gpio.fdl
+++ b/fdl/ch573/gpio.fdl
@@ -22,15 +22,18 @@ package ch573.gpio {
   /** Gpio port type. */
   type gpio_port_t : struct {
     /** Port direction register. */
-    reg (32) : struct {
-       dir : enum(1) {
-         [[ c: unqualified ]]
-         DIR_OUT = 1,
-
-         [[ c: unqualified ]]
-         DIR_IN = 0,
-       } [16];
-       reserved(16);
+    union {
+      reg (32) : struct {
+         dir : enum(1) {
+           [[ c: unqualified ]]
+           DIR_OUT = 1,
+
+           [[ c: unqualified ]]
+           DIR_IN = 0,
+         } [16];
+         reserved(16);
+      };
+      reg dir_reg(32);
     };
 
     /** Pin input register. */
@@ -49,15 +52,21 @@ package ch573.gpio {
     reg clr(32);
 
     /** Pull-up resistor configuration. */
-    reg (32) : struct {
-      pu : enable_t[16];
-      reserved(16);
+    union {
+      reg (32) : struct {
+        pu : enable_t[16];
+        reserved(16);
+      };
+      reg pu_reg(32);
     };
 
     /** pull-down/drive configuration register. */
-    reg (32) : struct {
-      pd_drv : pd_drv_t[16];
-      reserved(16);
+    union {
+      reg (32) : struct {
+        pd_drv : pd_drv_t[16];
+        reserved(16);
+      };
+      reg pd_drv_reg(32);
     };
   };