From 54fa33cbaefa7b934aa600238cbc808ecf0b5f5b Mon Sep 17 00:00:00 2001
From: Karun <karun@nautilusdefense.com>
Date: Thu, 13 Jun 2024 13:36:05 -0400
Subject: [PATCH] Add example for touch sensitive controller
---
examples/stm32u5/src/bin/tsc.rs | 89 +++++++++++++++++++++++++++++++++
1 file changed, 89 insertions(+)
create mode 100644 examples/stm32u5/src/bin/tsc.rs
diff --git a/examples/stm32u5/src/bin/tsc.rs b/examples/stm32u5/src/bin/tsc.rs
new file mode 100644
index 000000000..f5593d1c4
--- /dev/null
+++ b/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();
+ }
+}