Add example for touch sensitive controller

examples/stm32u5/src/bin/tsc.rs

@@ -0,0 +1,89 @@
+#![no_std]
+#![no_main]
+
+use defmt::*;
+use embassy_stm32::tsc::{self, *};
+use embassy_time::Timer;
+use {defmt_rtt as _, panic_probe as _};
+
+#[cortex_m_rt::exception]
+unsafe fn HardFault(_: &cortex_m_rt::ExceptionFrame) -> ! {
+    cortex_m::peripheral::SCB::sys_reset();
+}
+
+#[embassy_executor::main]
+async fn main(_spawner: embassy_executor::Spawner) {
+    let device_config = embassy_stm32::Config::default();
+    let context = embassy_stm32::init(device_config);
+
+    let config = tsc::Config {
+        ct_pulse_high_length: ChargeTransferPulseCycle::_2,
+        ct_pulse_low_length: ChargeTransferPulseCycle::_2,
+        spread_spectrum: false,
+        spread_spectrum_deviation: SSDeviation::new(2).unwrap(),
+        spread_spectrum_prescaler: false,
+        pulse_generator_prescaler: PGPrescalerDivider::_4,
+        max_count_value: MaxCount::_8191,
+        io_default_mode: false,
+        synchro_pin_polarity: false,
+        acquisition_mode: false,
+        max_count_interrupt: false,
+        channel_ios: TscIOPin::Group2Io2 | TscIOPin::Group7Io3,
+        shield_ios: TscIOPin::Group1Io3.into(),
+        sampling_ios: TscIOPin::Group1Io2 | TscIOPin::Group2Io1 | TscIOPin::Group7Io2,
+    };
+
+    let mut g1: PinGroup<embassy_stm32::peripherals::TSC, G1> = PinGroup::new();
+    g1.set_io2(context.PB13, PinType::Sample);
+    g1.set_io3(context.PB14, PinType::Shield);
+
+    let mut g2: PinGroup<embassy_stm32::peripherals::TSC, G2> = PinGroup::new();
+    g2.set_io1(context.PB4, PinType::Sample);
+    g2.set_io2(context.PB5, PinType::Channel);
+
+    let mut g7: PinGroup<embassy_stm32::peripherals::TSC, G7> = PinGroup::new();
+    g7.set_io2(context.PE3, PinType::Sample);
+    g7.set_io3(context.PE4, PinType::Channel);
+
+    let mut touch_controller = tsc::Tsc::new(
+        context.TSC,
+        Some(g1),
+        Some(g2),
+        None,
+        None,
+        None,
+        None,
+        Some(g7),
+        None,
+        config,
+    );
+
+    touch_controller.discharge_io(true);
+    Timer::after_millis(1).await;
+
+    touch_controller.start();
+
+    let mut group_two_val = 0;
+    let mut group_seven_val = 0;
+    info!("Starting touch_controller interface");
+    loop {
+        touch_controller.poll_for_acquisition();
+        touch_controller.discharge_io(true);
+        Timer::after_millis(1).await;
+
+        if touch_controller.group_get_status(Group::Two) == GroupStatus::Complete {
+            group_two_val = touch_controller.group_get_value(Group::Two);
+        }
+
+        if touch_controller.group_get_status(Group::Seven) == GroupStatus::Complete {
+            group_seven_val = touch_controller.group_get_value(Group::Seven);
+        }
+
+        info!(
+            "Group Two value: {}, Group Seven value: {},",
+            group_two_val, group_seven_val
+        );
+
+        touch_controller.start();
+    }
+}