From 7efd42715ea1d3b142c7f0ebf2f74281611a214a Mon Sep 17 00:00:00 2001
From: Astro <astro@spaceboyz.net>
Date: Sun, 10 Nov 2019 22:27:20 +0100
Subject: [PATCH] tec: enable GPIO pins for TEC SHDN

---
 firmware/src/board/gpio.rs |  4 ++++
 firmware/src/tec.rs        | 13 +++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/firmware/src/board/gpio.rs b/firmware/src/board/gpio.rs
index 974911b..9728915 100644
--- a/firmware/src/board/gpio.rs
+++ b/firmware/src/board/gpio.rs
@@ -72,3 +72,7 @@ pub struct PE4;
 def_gpio!(GPIO_PORTE_AHB, PE4, 4);
 pub struct PE5;
 def_gpio!(GPIO_PORTE_AHB, PE5, 5);
+pub struct PP4;
+def_gpio!(GPIO_PORTP, PP4, 4);
+pub struct PP5;
+def_gpio!(GPIO_PORTP, PP5, 5);
diff --git a/firmware/src/tec.rs b/firmware/src/tec.rs
index 85813c7..1d58103 100644
--- a/firmware/src/tec.rs
+++ b/firmware/src/tec.rs
@@ -1,5 +1,7 @@
 use core::fmt;
 use crate::board::pwm::{self, PwmChannel, PwmPeripheral};
+use crate::board::gpio::{Gpio, GpioOutput, PP4, PP5};
+use embedded_hal::digital::v2::OutputPin;
 
 #[derive(Clone, Copy, Debug)]
 pub enum TecPin {
@@ -33,6 +35,15 @@ impl fmt::Display for TecPin {
     }
 }
 
+fn enable_shdn<G>(gpio: G)
+where
+    G: Gpio,
+    GpioOutput<G>: OutputPin,
+{
+    let mut pin = gpio.into_output();
+    let _ = pin.set_high();
+}
+
 /// Thermo-Electric Cooling device controlled through four PWM
 /// channels
 pub struct Tec<MaxIPos: PwmChannel, MaxINeg: PwmChannel, ISet: PwmChannel, MaxV: PwmChannel> {
@@ -46,6 +57,7 @@ impl Tec<pwm::T2CCP0, pwm::T2CCP1, pwm::T3CCP0, pwm::T3CCP1> {
     pub fn tec0() -> Self {
         let (max_i_pos, max_i_neg) = tm4c129x::TIMER2::split();
         let (i_set, max_v) = tm4c129x::TIMER3::split();
+        enable_shdn(PP4);
         Tec { max_i_pos, max_i_neg, i_set, max_v }
     }
 }
@@ -54,6 +66,7 @@ impl Tec<pwm::T4CCP0, pwm::T4CCP1, pwm::T5CCP0, pwm::T5CCP1> {
     pub fn tec1() -> Self {
         let (max_i_pos, max_i_neg) = tm4c129x::TIMER4::split();
         let (i_set, max_v) = tm4c129x::TIMER5::split();
+        enable_shdn(PP5);
         Tec { max_i_pos, max_i_neg, i_set, max_v }
     }
 }