Cargo.toml

@@ -11,8 +11,7 @@ cortex-m-rt = "0.6.5"
 cortex-m-semihosting = "0.3.2"
 panic-halt = "0.2.0"
 panic-semihosting = "*"
-msp432p401r = { path = "../msp432-pac", features = ["rt"] }
-msp432-hal = { path = "../msp432-hal" }
+msp432p401r = { path = "../msp432p401r", features = ["rt"] }
 
 # Uncomment for the panic example.
 # panic-itm = "0.4.0"

openocd.cfg

@@ -4,4 +4,3 @@ source [find interface/xds110.cfg]
 adapter_khz 2500
 transport select swd
 source [find target/ti_msp432.cfg]
-reset_config none separate

src/main.rs

@@ -9,22 +9,29 @@ extern crate panic_halt; // you can put a breakpoint on `rust_begin_unwind` to c
 
 use cortex_m::{self, peripheral::syst::SystClkSource};
 use cortex_m_rt::entry;
-use msp432p401r as pac;
-use msp432_hal::prelude::*;
+use msp432p401r;
 
 use core::num::Wrapping;
 
+const PIN0: u8 = (1u8 << 0);
+const PIN1: u8 = (1u8 << 1);
+const PIN2: u8 = (1u8 << 2);
+//const PIN3: u8 = (1u8 << 3);
+const PIN4: u8 = (1u8 << 4);
+//const PIN5: u8 = (1u8 << 5);
+//const PIN6: u8 = (1u8 << 6);
+//const PIN7: u8 = (1u8 << 7);
+
 const WDOG_PWORD: u8 = 0x5a;
 
 #[entry]
 fn main() -> ! {
     let cp = cortex_m::Peripherals::take().unwrap();
-    let p = pac::Peripherals::take().unwrap();
+    let p = msp432p401r::Peripherals::take().unwrap();
 
     let mut syst = cp.SYST;
     let wdt = p.WDT_A;
     let dio = p.DIO;
-    let pins = dio.split();
 
     // disable watchdog timer
     wdt.wdtctl.write(|w| unsafe {
@@ -37,59 +44,38 @@ fn main() -> ! {
     syst.set_reload(20_000);
     syst.enable_counter();
 
-    // Set pin 1.0 to drive the single color LED
-    let mut led1 = pins.p1_0.into_strong_output();
-
-    // Set pin 2.0-2.2 to drive the RGB LED
-    let mut rgb_red = pins.p2_0.into_strong_output();
-    let mut rgb_blue = pins.p2_1.into_strong_output();
-    let mut rgb_green = pins.p2_2.into_strong_output();
+    // configure digital IO pins
+    dio.padir.modify(|_r, w| unsafe {
+        w.p1dir().bits(PIN0)
+         .p2dir().bits(PIN0 | PIN1 | PIN2)
+    });
 
     // Enable pull-up on P1.4 switch
-    let sw2 = pins.p1_4.into_pullup();
+    dio.paren.modify(|_r, w| unsafe { w.p1ren().bits(PIN4) });
+    dio.pads.modify(|_r, w| unsafe { w.p1ds().bits(PIN4) });
 
-    // Turn on LED1
-    led1.set_high();
+    // Turn on LED1 on P1.0 and enable pull-up on P1.1 switch
+    dio.paout.write(|w| unsafe {
+        w.p1out().bits(PIN0 | PIN4)
+         .p2out().bits(0)
+    });
 
     let mut count: Wrapping<u16> = Wrapping(0);
-    let mut input: u16;
+    let mut input: u8;
     loop {
         while !syst.has_wrapped() {}
 
         // The button pulls the input to GND
-        input = sw2.read_pin();
+        input = (dio.pain.read().p1in().bits() & PIN4) >> 4;
 
         count += Wrapping(1);
         let _led1: u8 = ((count.0 & 0x0100) >> 8) as u8;
         let led2: u8 = ((count.0 & 0b0000_0111_0000_0000) >> 8) as u8;
 
-        // toggle RGB LEDs
-
-        if led2 & 0b001 == 0 {
-            rgb_red.set_high()
-        } else {
-            rgb_red.set_low()
-        }
-
-        if led2 & 0b010 == 0 {
-            rgb_blue.set_high()
-        } else {
-            rgb_blue.set_low()
-        }
-
-        if led2 & 0b100 == 0 {
-            rgb_green.set_high()
-        } else {
-            rgb_green.set_low()
-        }
-
-        // set led1 according to sw2
-
-        if input != 0 {
-            led1.set_low()
-        } else {
-            led1.set_high()
-        }
-
+        // toggle LEDs
+        dio.paout.write(|w| unsafe {
+            w.p1out().bits(input | PIN4)
+             .p2out().bits(led2)
+        });
     }
 }