add a test loop to check the IRQ pin configuration

this all seems to work as expected now, next up: hooking the
interrupt handler for the IOX.

Probably should put the actual IRQ router in the HAL so that multiple
services can configure it, but have the handler actually invoke
a function in our address space.

services/usb-cramium/src/main.rs

@@ -16,6 +16,7 @@ use std::sync::Arc;
 
 use api::{HIDReport, LogLevel, Opcode, U2fCode, U2fMsgIpc, UsbListenerRegistration};
 use cram_hal_service::api::KeyMap;
+use cramium_hal::axp2101::VbusIrq;
 use cramium_hal::usb::driver::{CorigineUsb, CorigineWrapper};
 use hw::CramiumUsb;
 use hw::UsbIrqReq;
@@ -239,6 +240,32 @@ pub(crate) fn main_hw() -> ! {
         }
     });
 
+    std::thread::spawn({
+        move || {
+            log::info!("Connecting to I2C");
+            let mut i2c = cram_hal_service::I2c::new();
+            let mut pmic = cramium_hal::axp2101::Axp2101::new(&mut i2c).expect("couldn't open PMIC");
+            let iox = cram_hal_service::IoxHal::new();
+            log::info!("AXP2101 config: {:?}", pmic);
+            let tt = ticktimer::Ticktimer::new().unwrap();
+            pmic.setup_vbus_irq(&mut i2c, cramium_hal::axp2101::VbusIrq::InsertAndRemove)
+                .expect("couldn't setup IRQ");
+            // PB13 is the IRQ input
+            loop {
+                tt.sleep_ms(500).ok();
+                let status = pmic.get_vbus_irq_status(&mut i2c).unwrap();
+                log::info!(
+                    "Status: {:?}, {:?}",
+                    status,
+                    iox.get_gpio_pin_value(cramium_hal::iox::IoxPort::PB, 13)
+                );
+                if status != VbusIrq::None {
+                    pmic.clear_vbus_irq_pending(&mut i2c).expect("couldn't clear pending VBUS IRQ");
+                }
+            }
+        }
+    });
+
     log::info!("Entering main loop");
 
     let mut msg_opt = None;