application: Extract time and position from GPS NMEA messages.

[gps-watch.git] / src / application / main.rs

diff --git a/src/application/main.rs b/src/application/main.rs
index 55214279c599367e8010a578cb597291b7449675..dbd748c8e28013e25f5c62afdd8f24d68251ba86 100644 (file)
--- a/src/application/main.rs
+++ b/src/application/main.rs
@@ -22,15 +22,24 @@
  */
 
 #![no_std]
-#![crate_type="staticlib"]
+#![no_main]
 #[link(name="libcommon.rlib")]
 
 extern crate common;
 
+mod uart0;
+
 use common::buffer::Buffer;
 use common::clock;
 use common::systick;
+use common::port;
+use common::gpio;
+use common::nvic;
+use common::i2c;
+use common::uart;
 use common::usb_serial;
+use common::display;
+use common::gps;
 
 extern {
     fn enable_interrupts();
@@ -39,9 +48,36 @@ extern {
 }
 
 #[no_mangle]
-pub unsafe extern fn main() {
+pub unsafe extern "C" fn _start() -> ! {
     clock::configure();
+    clock::enable_osc0();
     systick::init();
+    port::init();
+
+    // Configure pins for I2C0.
+    port::set_af(port::PORTC, 8, 2);
+    port::set_af(port::PORTC, 9, 2);
+
+    i2c::configure(i2c::I2C0);
+
+    nvic::disable_irq(8); // I2C0
+
+    // Configure pin for the display's reset line.
+    gpio::set_direction(gpio::GPIOB, 1 << 16, gpio::Direction::Output);
+    port::set_af(port::PORTB, 16, 1);
+
+    // Configure pins for UART0.
+    port::set_af(port::PORTE, 20, 4);
+    port::set_af(port::PORTE, 21, 4);
+
+    // Configure pin for the GPS's reset line.
+    gpio::set_direction(gpio::GPIOB, 1 << 1, gpio::Direction::Output);
+    port::set_af(port::PORTB, 1, 1);
+
+    // Configure upper right push button.
+    gpio::set_direction(gpio::GPIOA, 1 << 12, gpio::Direction::Input);
+    port::set_af(port::PORTA, 12, 1);
+    port::set_pull(port::PORTA, 12, port::Pull::Up);
 
     enable_interrupts();
 
@@ -50,10 +86,30 @@ pub unsafe extern fn main() {
     cdc_tx_buf.write(b"\n");
     cdc_tx_buf.flush();
 
+    let mut display = display::Display::new(gpio::GPIOB, 1 << 16, 0x3c);
+
+    display.init();
+    display.clear();
+
+    // Hold GPS in reset while configuring its UART.
+    gpio::clear(gpio::GPIOB, 1);
+    systick::delay_ms(50);
+    uart::configure(uart::UART0);
+    systick::delay_ms(50);
+    gpio::set(gpio::GPIOB, 1);
+
+    nvic::enable_irq(12); // UART0
+
+    let mut gps = gps::Gps::new();
+
     loop {
-        systick::delay_ms(1000);
+        let mut tap = gps::TimeAndPos::new();
+
+        while gps.update(&mut tap) {
+        }
 
-        cdc_tx_buf.write(b".\n");
-        cdc_tx_buf.flush();
+        if (gpio::get(gpio::GPIOA) & (1 << 12)) == 0 {
+            nvic::system_reset();
+        }
     }
 }