From 6b89ee1b8eaa783f25c265a4f5af0f7246315c01 Mon Sep 17 00:00:00 2001
From: Chris <github@caemor.de>
Date: Fri, 12 Oct 2018 11:30:04 +0200
Subject: [PATCH] Set spi chunk limit on linux with cfg!

Not tested yet
---
 src/interface.rs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/interface.rs b/src/interface.rs
index 1b1a6b9..76cbde5 100644
--- a/src/interface.rs
+++ b/src/interface.rs
@@ -100,8 +100,17 @@ where
     {
         // activate spi with cs low
         self.cs.set_low();
+
         // transfer spi data
-        spi.write(data)?;
+        // Be careful!! Linux has a default limit of 4096 bytes per spi transfer
+        if cfg!(target_os = "linux") {
+            for data_chunk in data.chunks(4096) {
+                spi.write(data_chunk)?;
+            }
+        } else {
+            spi.write(data)?;
+        }
+        
         // deativate spi with cs high
         self.cs.set_high();