From 231e9b7cb76a137c211af00bc845ec37b5f1fef7 Mon Sep 17 00:00:00 2001
From: Brad Barnett <127794626+bdbarnett@users.noreply.github.com>
Date: Wed, 21 Oct 2026 14:59:25 -0500
Subject: [PATCH] audiograph on CircuitPython: go through void * for the output
 block's int16 pointer

CircuitPython's ESP32 builds compile with -Werror=cast-align, and the cast
from a byte pointer to int16_t * stopped the build. The offset is a whole
number of int16 blocks into an int16 buffer, so the pointer is aligned;
the cast now says so. Nothing else changes.
---
 src/circuitpython_spike/shared-bindings/audiograph/Graph.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/circuitpython_spike/shared-bindings/audiograph/Graph.c b/src/circuitpython_spike/shared-bindings/audiograph/Graph.c
index 81ff85e..384474c 100644
--- a/src/circuitpython_spike/shared-bindings/audiograph/Graph.c
+++ b/src/circuitpython_spike/shared-bindings/audiograph/Graph.c
@@ -248,7 +248,7 @@ static mp_obj_t audiograph_graph_run(size_t n_args, const mp_obj_t *args) {
         if (block < 0 || (size_t)(block + 1) * block_bytes > info.len) {
             mp_raise_ValueError(MP_ERROR_TEXT("out is too small for that block"));
         }
-        out = (int16_t *)((uint8_t *)info.buf + (size_t)block * block_bytes);
+        out = (int16_t *)(void *)((uint8_t *)info.buf + (size_t)block * block_bytes);
     }
     uint32_t enable = 0xFFFFFFFFu;
     if (n_args > 3) {