From 68c7193ffd1c8ad922ec4eefbbff5b9a2b686f93 Mon Sep 17 00:00:00 2001
From: Ral <noreply@git.tinkeral.ch>
Date: Sun, 4 Jun 2023 03:04:16 +0200
Subject: [PATCH] Write to bus in chunks of 8 bytes a time

---
 src/i2c.rs | 31 +++++++++++++++++++++----------
 1 file changed, 21 insertions(+), 10 deletions(-)

diff --git a/src/i2c.rs b/src/i2c.rs
index 2ec011f..b2d8938 100644
--- a/src/i2c.rs
+++ b/src/i2c.rs
@@ -1,6 +1,9 @@
 use i2cdev::core::*;
 use i2cdev::linux::{LinuxI2CDevice, LinuxI2CMessage};
 
+use std::thread;
+use std::time::Duration;
+
 pub fn read_from_bus(
     i2c_device: &str,
     slave_address: u16,
@@ -28,15 +31,23 @@ pub fn write_to_bus(
     data: &[u8],
 ) -> Result<(), std::io::Error> {
     let mut dev = LinuxI2CDevice::new(i2c_device, slave_address)?;
-    let mut msgs = [
-        // Address to write to
-        LinuxI2CMessage::write(&[0x00]),
-        // Write data to chip
-        LinuxI2CMessage::write(data),
-    ];
 
-    match dev.transfer(&mut msgs) {
-        Ok(_) => Ok(()),
-        Err(e) => Err(e.into()),
-    }
+    // Write 8 bytes at a time
+    for (i, chunk) in data.chunks_exact(8).into_iter().enumerate() {
+
+        // Memory address
+        let memory_address : u8 = (i as u8) * 8;
+        let mut msgs = [
+            // Address to write to
+            LinuxI2CMessage::write(&[memory_address]),
+            // Write data to chip
+            LinuxI2CMessage::write(&chunk),
+        ];
+
+        dev.transfer(&mut msgs)?;
+
+        thread::sleep(Duration::from_millis(20));
+    };
+
+    Ok(())
 }