From 69ed2fc701e96e382163b56cc5e166cd65738d6b Mon Sep 17 00:00:00 2001
From: LongHairedHacker <sebastian@sebastians-site.de>
Date: Wed, 29 Aug 2018 00:43:29 +0200
Subject: [PATCH] max6675 library works

---
 src/main.rs    | 31 +++++++++++++++++--------------
 src/max6675.rs | 16 +++++++++-------
 2 files changed, 26 insertions(+), 21 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 453d601..aeb7c3d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -32,9 +32,9 @@ fn configure_clocks(rcc: &mut rcc::RCC) {
 
     rcc.clock_config
         .configure(|c| {
-                       c.set_pll_multiplier(10)
-                           .set_pll_source(rcc::PllSource::HsiDiv2)
-                   });
+            c.set_pll_multiplier(10)
+            .set_pll_source(rcc::PllSource::HsiDiv2)
+        });
 
     rcc.clock_control.set_pll_on(true);
     while !rcc.clock_control.pll_ready() {}
@@ -64,16 +64,17 @@ fn configure_peripherals(rcc: &mut hcl::platform::rcc::RCC,
         .set_output_config(7, gpio::OutputConfig::AfPushPull)
         // MISO1
         .set_mode(6, gpio::PinMode::Input)
+        .set_input_config(6, gpio::InputConfig::PullUpDown)
         // NSS1
         .set_mode(4, gpio::PinMode::Output50MHz)
         .set_output_config(4, gpio::OutputConfig::PushPull)
     });
 
     usart.configure(|u| {
-                        u.set_enabled(true)
-                            .set_tx_enabled(true)
-                            .set_baudgen((21, 11))
-                    }); // 115.2 kbaud
+        u.set_enabled(true)
+        .set_tx_enabled(true)
+        .set_baudgen((21, 11))
+    }); // 115.2 kbaud
 }
 
 
@@ -92,16 +93,18 @@ fn run(mut scs: scs::Instance, mut p: hcl::platform::Instance) {
 
 
     loop {
-        for i in 0u16..0xffff {
 
-            let res = max6675::read(spi, gpio, 4);
+        let res = max6675::read(spi, gpio, 4);
 
-            let msg = match res {
-                Ok(temp) => format!("> {}\r\n", temp).into_bytes(),
-                Err(err) => format!("Error > {}\r\n", err).into_bytes(),
-            };
+        let msg = match res {
+            Ok(temp) => format!("> {}\r\n", temp).into_bytes(),
+            Err(err) => format!("Error > {}\r\n", err).into_bytes(),
+        };
 
-            printer.print(msg);
+        printer.print(msg);
+
+        for y in 0u32..0xFFFFFF {
+            unsafe { asm!("nop" :::: "volatile") };
         }
     }
 }
diff --git a/src/max6675.rs b/src/max6675.rs
index 413d16a..2b64b46 100644
--- a/src/max6675.rs
+++ b/src/max6675.rs
@@ -11,13 +11,15 @@ pub fn read<SPIAddr, GPIOAddr>(spi: &mut PeripheralRef<spi::SPI, SPIAddr>,
           GPIOAddr: Location
 {
     spi.configure(|s| {
-                      s.set_enabled(true)
-                          .set_master_mode(true)
-                          .set_software_slave_select(true)
-                          .set_clock_divider(128)
-                          .set_data_16bit(true)
-                          .set_clock_skip_first(true)
-                  });
+        s.set_enabled(true)
+        .set_master_mode(true)
+        .set_software_slave_select(true)
+        .set_clock_divider(128)
+        .set_data_16bit(true)
+        .set_clock_skip_first(true)
+        // required for master mode, even if ss is done manually
+        .set_slave_select_output_enabled(true)
+    });
 
     nss_gpio.reset_bit(nss_idx);