From bbf486c8ff4f05ce4bd0b3485f42e06cf3c51c33 Mon Sep 17 00:00:00 2001
From: Ben Cochran <bcochran@gmail.com>
Date: Fri, 8 Dec 2023 22:49:16 -0800
Subject: [PATCH] Fix charge_rate when discharging

MAX17048 & MAX17049 report negative values when discharging, so interpret it as
i16 instead of u16 before converting to f32.

Resolves #1
---
 src/max170x8_x9.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/max170x8_x9.rs b/src/max170x8_x9.rs
index 6e955e7..402bffa 100644
--- a/src/max170x8_x9.rs
+++ b/src/max170x8_x9.rs
@@ -100,7 +100,7 @@ macro_rules! impl_common_48_49 {
             /// Get the approximate charge or discharge rate of the battery
             /// in percentage / hour
             pub fn charge_rate(&mut self) -> Result<f32, Error<E>> {
-                let rate = self.read_register(Register::CRATE)?;
+                let rate = self.read_register(Register::CRATE)? as i16;
                 Ok(f32::from(rate) * 0.208)
             }
         }