i²c working.

1 files changed, 19 insertions, 1 deletions

diff --git a/src/main.rs b/src/main.rs
index 071966a..84bc3c0 100755
--- a/src/main.rs
+++ b/src/main.rs
@@ -11,7 +11,7 @@ use core::mem;
 use core::panic::PanicInfo;
 use cortex_m::asm::wfi;
 use cortex_m_rt::{entry, exception, ExceptionFrame};
-use embedded_hal::digital::v2::OutputPin;
+use embedded_hal::{blocking::i2c::Write, digital::v2::OutputPin};
 use log::{info, LevelFilter};
 use smart_leds::colors;
 use smart_leds_trait::SmartLedsWrite;
@@ -31,6 +31,8 @@ static mut LED: usize = 0;
 
 static HANDLERS: HandlerArray = HandlerArray::new();
 
+const NRF_WIREADDR: u8 = 10;
+
 #[entry]
 fn main() -> ! {
     let mut cp = CorePeripherals::take().expect("taking core peripherals");
@@ -56,6 +58,16 @@ fn main() -> ! {
         &mut pins.port,
     );
 
+    let mut i2c_master = hal::i2c_master(
+        &mut clocks,
+        400_000.hz(),
+        dp.SERCOM2,
+        &mut dp.PM,
+        pins.d0,
+        pins.d2,
+        &mut pins.port,
+    );
+
     let mut red_led = pins.d13.into_open_drain_output(&mut pins.port);
     red_led.set_low().expect("turning off red LED");
     unsafe { LED = mem::transmute(&red_led) }
@@ -98,7 +110,13 @@ fn main() -> ! {
 
         info!("Bootstrap complete.");
 
+        let mut last_tick = 0;
         loop {
+            let tick = rtc::millis();
+            if tick > last_tick + 1024 {
+                last_tick = tick;
+                i2c_master.write(NRF_WIREADDR, b"!").expect("writing i2c");
+            }
             wfi()
         }
     });