From c38214865fc5fa55f886d2f35a411da233effd3f Mon Sep 17 00:00:00 2001
From: bunnie <bunnie@kosagi.com>
Date: Sat, 28 Feb 2026 23:20:04 +0800
Subject: [PATCH] add a routine to initialize the ioconfig from the resource
 spec

in particular this makes sure the io config masks are extracted.
---
 libs/bao1x-api/src/bio.rs | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/libs/bao1x-api/src/bio.rs b/libs/bao1x-api/src/bio.rs
index 74c549f3a..e4c31bd6b 100644
--- a/libs/bao1x-api/src/bio.rs
+++ b/libs/bao1x-api/src/bio.rs
@@ -18,6 +18,8 @@ use num_traits::ToPrimitive;
 use xous::MemoryRange;
 
 use crate::IoxPort;
+#[cfg(feature = "std")]
+use crate::bio_resources::ResourceSpec;
 
 pub const BIO_SERVER_NAME: &'static str = "_BIO server_";
 
@@ -401,6 +403,22 @@ impl Default for IoConfig {
         }
     }
 }
+#[cfg(feature = "std")]
+impl IoConfig {
+    pub fn from_resource_spec(spec: &ResourceSpec, mode: &Option<IoConfigMode>) -> Result<Self, String> {
+        let mut mask: u32 = 0;
+        for &pin in spec.static_pins.iter() {
+            if pin > 31 {
+                return Err(format!("Pin {} exceeds maximum bit position of 31", pin));
+            }
+            mask |= 1u32 << pin;
+        }
+        let mut ret = IoConfig::default();
+        ret.mapped = mask;
+        ret.mode = mode.unwrap_or(IoConfigMode::Overwrite);
+        Ok(ret)
+    }
+}
 
 #[bitfield(u8)]
 #[derive(Debug)]