From c2bdfafb4376454eeecef7825ed38d8ad3dac35a Mon Sep 17 00:00:00 2001
From: Berkus Decker <berkus+github@metta.systems>
Date: Thu, 17 Jan 2019 19:40:23 +0200
Subject: [PATCH] Gate uart enable behind cargo feature

---
 Cargo.toml           |  1 +
 device.sh            |  2 +-
 src/platform/uart.rs | 14 ++++++++++++++
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/Cargo.toml b/Cargo.toml
index 8b2e2f8..906ac43 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,6 +14,7 @@ publish = false
 [features]
 unstable = []
 realtime = []
+noserial = []
 
 #[lib]
 #name = "nucleus"
diff --git a/device.sh b/device.sh
index 2cbc734..9fdc65a 100755
--- a/device.sh
+++ b/device.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-cargo xbuild --target=targets/aarch64-vesper-metta.json --release && \
+cargo xbuild --target=targets/aarch64-vesper-metta.json --release --features "noserial" && \
 sh .cargo/runscript.sh target/aarch64-vesper-metta/release/vesper && \
 cp target/aarch64-vesper-metta/release/vesper.bin /Volumes/boot/vesper && \
 diskutil eject /Volumes/boot/
diff --git a/src/platform/uart.rs b/src/platform/uart.rs
index ad7c8d5..0b05df1 100644
--- a/src/platform/uart.rs
+++ b/src/platform/uart.rs
@@ -150,6 +150,7 @@ impl MiniUart {
     }
 
     ///Set baud rate and characteristics (115200 8N1) and map to GPIO
+    #[cfg(not(feature = "noserial"))]
     pub fn init(&self) {
         // initialize UART
         self.AUX_ENABLES.modify(AUX_ENABLES::MINI_UART_ENABLE::SET);
@@ -180,7 +181,11 @@ impl MiniUart {
             .write(AUX_MU_CNTL::RX_EN::Enabled + AUX_MU_CNTL::TX_EN::Enabled);
     }
 
+    #[cfg(feature = "noserial")]
+    pub fn init(&self) {}
+
     /// Send a character
+    #[cfg(not(feature = "noserial"))]
     pub fn send(&self, c: char) {
         // wait until we can send
         loop_until(|| self.AUX_MU_LSR.is_set(AUX_MU_LSR::TX_EMPTY));
@@ -189,7 +194,11 @@ impl MiniUart {
         self.AUX_MU_IO.set(c as u32);
     }
 
+    #[cfg(feature = "noserial")]
+    pub fn send(&self, _c: char) {}
+
     /// Receive a character
+    #[cfg(not(feature = "noserial"))]
     pub fn getc(&self) -> char {
         // wait until something is in the buffer
         loop_until(|| self.AUX_MU_LSR.is_set(AUX_MU_LSR::DATA_READY));
@@ -205,6 +214,11 @@ impl MiniUart {
         }
     }
 
+    #[cfg(feature = "noserial")]
+    pub fn getc(&self) -> char {
+        '\n'
+    }
+
     /// Display a string
     pub fn puts(&self, string: &str) {
         for c in string.chars() {