Temp might be working now.

src/main.rs

@@ -4,13 +4,12 @@
 #![no_std]
 #![no_main]
 
-use bsp::{
-    entry,
-    hal::gpio,
-};
+use bsp::{entry, hal::gpio};
 use defmt::*;
 use defmt_rtt as _;
 use embedded_hal::digital::v2::OutputPin;
+use embedded_hal::spi::MODE_0;
+use max31855::{Max31855, Unit};
 use panic_probe as _;
 
 // Provide an alias for our BSP so we can switch targets quickly.
@@ -19,8 +18,10 @@ use rp_pico as bsp;
 
 use bsp::hal::{
     clocks::{init_clocks_and_plls, Clock},
+    fugit::RateExtU32,
     pac,
     sio::Sio,
+    spi::Spi,
     watchdog::Watchdog,
 };
 
@@ -58,14 +59,26 @@ fn main() -> ! {
     let mut led_pin = pins.led.into_push_pull_output();
     let mut external_led_pin = pins.gpio14.into_push_pull_output();
     //clk
-    let _thermometer_spi_sck = pins.gpio2.into_function::<gpio::FunctionSpi>();
+    let thermometer_spi_sck = pins.gpio2.into_function::<gpio::FunctionSpi>();
+    //MOSI, I think unused?
+    let thermometer_spi_tx = pins.gpio3.into_function::<gpio::FunctionSpi>();
     //do, or MISO.
-    let _thermometer_spi_rx = pins.gpio4.into_function::<gpio::FunctionSpi>();
+    let thermometer_spi_rx = pins.gpio4.into_function::<gpio::FunctionSpi>();
     //cs
-    let _thermometer_spi_csn = pins
+    let mut thermometer_spi_csn = pins
         .gpio5
         .into_push_pull_output_in_state(gpio::PinState::Low);
 
+    let thermometer_spi_device = pac.SPI0;
+    let spi_pin_layout = (thermometer_spi_tx, thermometer_spi_rx, thermometer_spi_sck);
+    let mut spi = Spi::<_, _, _, 8>::new(thermometer_spi_device, spi_pin_layout).init(
+        &mut pac.RESETS,
+        125_000_000u32.Hz(),
+        4u32.MHz(),
+        MODE_0,
+    );
+
+
     loop {
         led_pin.set_high().unwrap();
         external_led_pin.set_low().unwrap();
@@ -73,5 +86,7 @@ fn main() -> ! {
         led_pin.set_low().unwrap();
         external_led_pin.set_high().unwrap();
         delay.delay_ms(1000);
+        let value = spi.read_thermocouple(&mut thermometer_spi_csn, Unit::Celsius).unwrap();
+        info!("temp is {}", value);
     }
 }