diff --git a/examples/noise.rs b/examples/noise.rs
index c089326b61f22361bbc03c79ceb204e8b107b1c4..f3d2eb8e8a049a403de54b64d597480ab11c91ea 100644
--- a/examples/noise.rs
+++ b/examples/noise.rs
@@ -49,56 +49,57 @@ async fn main(_spawner: Spawner) {
// let mut gpio = p.PIN_20.into();
let mut hist = [0u32; 200];
- let mut n = 0;
- let PRINT = 50000;
+ let PRINT = 1000;
// let PRINT = 50;
+ // let mut gpios = [
+ // p.PIN_22.degrade().into_ref(),
+ // p.PIN_6.degrade().into_ref(),
+ // p.PIN_10.degrade().into_ref(),
+ // p.PIN_13.degrade().into_ref(),
+ // // p.PIN_23.degrade().into_ref(),
+ // // p.PIN_24.degrade().into_ref(),
+ // p.PIN_25.degrade().into_ref(),
+ // ];
+
let mut gpios = [
+ // serial
+ // p.PIN_0.degrade().into_ref(),
+ // p.PIN_1.degrade().into_ref(),
+ p.PIN_2.degrade().into_ref(),
+ p.PIN_3.degrade().into_ref(),
+ p.PIN_4.degrade().into_ref(),
+ p.PIN_5.degrade().into_ref(),
p.PIN_6.degrade().into_ref(),
+ p.PIN_7.degrade().into_ref(),
+ p.PIN_8.degrade().into_ref(),
+ p.PIN_9.degrade().into_ref(),
p.PIN_10.degrade().into_ref(),
+ p.PIN_11.degrade().into_ref(),
+ p.PIN_12.degrade().into_ref(),
p.PIN_13.degrade().into_ref(),
+ p.PIN_14.degrade().into_ref(),
+ p.PIN_15.degrade().into_ref(),
+ p.PIN_16.degrade().into_ref(),
+ p.PIN_17.degrade().into_ref(),
+ p.PIN_18.degrade().into_ref(),
+ p.PIN_19.degrade().into_ref(),
+ p.PIN_20.degrade().into_ref(),
+ p.PIN_21.degrade().into_ref(),
p.PIN_22.degrade().into_ref(),
// p.PIN_23.degrade().into_ref(),
// p.PIN_24.degrade().into_ref(),
p.PIN_25.degrade().into_ref(),
+ p.PIN_26.degrade().into_ref(),
+ p.PIN_27.degrade().into_ref(),
+ p.PIN_28.degrade().into_ref(),
+ // p.PIN_29.degrade().into_ref(),
];
- // let mut gpios = [
- // p.PIN_0.degrade().into_ref(),
- // p.PIN_1.degrade().into_ref(),
- // p.PIN_2.degrade().into_ref(),
- // p.PIN_3.degrade().into_ref(),
- // p.PIN_4.degrade().into_ref(),
- // p.PIN_5.degrade().into_ref(),
- // p.PIN_6.degrade().into_ref(),
- // p.PIN_7.degrade().into_ref(),
- // p.PIN_8.degrade().into_ref(),
- // p.PIN_9.degrade().into_ref(),
- // p.PIN_10.degrade().into_ref(),
- // p.PIN_11.degrade().into_ref(),
- // p.PIN_12.degrade().into_ref(),
- // p.PIN_13.degrade().into_ref(),
- // p.PIN_14.degrade().into_ref(),
- // p.PIN_15.degrade().into_ref(),
- // p.PIN_16.degrade().into_ref(),
- // p.PIN_17.degrade().into_ref(),
- // p.PIN_18.degrade().into_ref(),
- // p.PIN_19.degrade().into_ref(),
- // p.PIN_20.degrade().into_ref(),
- // p.PIN_21.degrade().into_ref(),
- // p.PIN_22.degrade().into_ref(),
- // // p.PIN_23.degrade().into_ref(),
- // // p.PIN_24.degrade().into_ref(),
- // p.PIN_25.degrade().into_ref(),
- // p.PIN_26.degrade().into_ref(),
- // p.PIN_27.degrade().into_ref(),
- // p.PIN_28.degrade().into_ref(),
- // // p.PIN_29.degrade().into_ref(),
- // ];
-
for gpio in gpios.iter_mut() {
let pin = gpio.pin();
+ let mut n = 0;
caprand::noise(gpio.reborrow(), &mut cp.SYST,
|v, overshoot| {
// info!("{}", v);
@@ -114,10 +115,8 @@ async fn main(_spawner: Spawner) {
*h = 0;
}
}
- false
- } else {
- true
}
+ n < PRINT
}).unwrap();
}
diff --git a/src/cap.rs b/src/cap.rs
index 07cfcb103b408f84a04ca5fc930fbb76050ef952..823ae68690ab605ebf46ed9a86ab172440045b4d 100644
--- a/src/cap.rs
+++ b/src/cap.rs
@@ -106,28 +106,37 @@ impl<'t> SyTi<'t> {
// Returns (ticks: u32, precise: bool)
fn time_rise(pin: PeripheralRef<AnyPin>, wait: &mut u32, rpos: &mut u32, syst: &mut SYST) -> Result<(u32, bool), ()> {
- let pin_num = pin.pin();
- // bank 0 single cycle IO in
- let gpio_in = pac::SIO.gpio_in(0).ptr();
+ let pin_num = pin.pin() as usize;
let mask = 1u32 << pin_num;
+ // bank 0 single cycle IO in
+ let gpio_in = pac::SIO.gpio_in(0).ptr();
let so = pac::SIO.gpio_out(0);
let soe = pac::SIO.gpio_oe(0);
unsafe {
- so.value_clr().write_value(1<<pin_num);
- soe.value_set().write_value(1<<pin_num);
+ so.value_clr().write_value(1 << pin_num);
+ soe.value_set().write_value(1 << pin_num);
}
- // unsafe {
- // asm!(
- // "nop",
- // )
- // }
- // cortex_m::asm::delay(200);
- cortex_m::asm::delay(1000);
+ // // unsafe {
+ // // asm!(
+ // // "nop",
+ // // )
+ // // }
+ // cortex_m::asm::delay(20);
+ // cortex_m::asm::delay(1000);
unsafe {
- soe.value_clr().write_value(1<<pin_num);
+ soe.value_clr().write_value(1 << pin_num);
}
+ unsafe {
+ pac::PADS_BANK0
+ .gpio(pin_num)
+ .modify(|s| {
+ // Pullup
+ s.set_pue(true);
+ });
+ };
+
// for testing with logic analyzer
// let mut out = Flex::new(unsafe { embassy_rp::peripherals::PIN_16::steal() });
// out.set_as_output();
@@ -145,8 +154,7 @@ fn time_rise(pin: PeripheralRef<AnyPin>, wait: &mut u32, rpos: &mut u32, syst: &
let x3: u32;
let x4: u32;
let x5: u32;
- let mut gpio = Flex::<AnyPin>::new(pin);
- gpio.set_pull(Pull::Up);
+
unsafe {
asm!(
// save
@@ -209,6 +217,15 @@ fn time_rise(pin: PeripheralRef<AnyPin>, wait: &mut u32, rpos: &mut u32, syst: &
*wait = (*wait+1).max(10000);
}
+ unsafe {
+ pac::PADS_BANK0
+ .gpio(pin_num)
+ .modify(|s| {
+ // No pullup
+ s.set_pue(false);
+ });
+ };
+
*rpos = pos;
Ok((tick, precise))
}
@@ -233,13 +250,6 @@ where
// XXX Somehow disabling ROSC breaks SWD, perhaps signal integrity issues?
// unsafe{ pac::ROSC.ctrl().modify(|s| s.set_enable(pac::rosc::vals::Enable::DISABLE)) };
- // Disabling the Schmitt Trigger gives a clearer correlation between "overshoot"
- // and measured values.
- unsafe {
- pac::PADS_BANK0
- .gpio(pin_num)
- .modify(|s| s.set_schmitt(false))
- };
let mut gpio = Flex::<AnyPin>::new(pin.reborrow());
// Measure pullup time from 0 as a sanity check
@@ -256,13 +266,14 @@ where
t.done()
})?;
drop(gpio);
- // info!("Initial pullup del is {}", del);
+ info!("Initial pullup del is {}", del);
if del < MIN_CAPACITOR_DEL {
error!("Capacitor seems small or missing?");
return Err(())
}
+
// The main loop
let mut overshoot = 1u32;
@@ -270,6 +281,26 @@ where
let mut wait = 0;
let mut pos = 0;
+ unsafe {
+ pac::PADS_BANK0
+ .gpio(pin_num)
+ .modify(|s| {
+ // Disabling the Schmitt Trigger gives a clearer correlation between "overshoot"
+ // and measured values.
+ s.set_schmitt(false);
+ // Input enable
+ s.set_ie(true);
+ });
+
+ // Use SIO
+ pac::IO_BANK0
+ .gpio(pin_num)
+ .ctrl()
+ .modify(|s| {
+ s.set_funcsel(pac::io::vals::Gpio0ctrlFuncsel::SIO_0.0)
+ });
+ }
+
// After warmup we sample twice at each "overshoot" value.
// One sample is returned as random output, the other is mixed
// in to the overshoot value.
@@ -293,8 +324,8 @@ where
let (r, precise) = time_rise(pin.reborrow(), &mut wait, &mut pos, syst)?;
- let mut gpio = Flex::<AnyPin>::new(pin.reborrow());
- gpio.set_pull(Pull::None);
+ // let mut gpio = Flex::<AnyPin>::new(pin.reborrow());
+ // gpio.set_pull(Pull::None);
// if (r > )