From 81e62479e5eb34549a1b364121dad47f09adf2de Mon Sep 17 00:00:00 2001
From: atse <atse@m-labs.hk>
Date: Wed, 3 Apr 2024 11:31:34 +0800
Subject: [PATCH] Limit i_set within range of MAX1968 chip

---
 src/command_handler.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/command_handler.rs b/src/command_handler.rs
index efea1b8..e2a5824 100644
--- a/src/command_handler.rs
+++ b/src/command_handler.rs
@@ -54,7 +54,8 @@ pub enum Handler {
 pub enum Error {
     ReportError,
     PostFilterRateError,
-    FlashError
+    FlashError,
+    InputOutOfRangeError,
 }
 
 pub type JsonBuffer = Vec<u8, U1024>;
@@ -185,6 +186,10 @@ impl Handler {
         match pin {
             PwmPin::ISet => {
                 channels.channel_state(channel).pid_engaged = false;
+                if -3.0 < value || value > 3.0 {
+                    send_line(socket, b"{\"error\": \"i_set can only be in range [-3A, 3A]\"}");
+                    return Err(Error::InputOutOfRangeError);
+                }
                 let current = ElectricCurrent::new::<ampere>(value);
                 channels.set_i(channel, current);
                 channels.power_up(channel);