48 lines
1.3 KiB
Rust
48 lines
1.3 KiB
Rust
//! This example shows how to use SPI (Serial Peripheral Interface) in the RP2040 chip.
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//!
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//! Example for resistive touch sensor in Waveshare Pico-ResTouch
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#![no_std]
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#![no_main]
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#![feature(type_alias_impl_trait)]
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use defmt::*;
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use embassy_executor::Spawner;
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use embassy_rp::spi::Spi;
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use embassy_rp::{gpio, spi};
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use gpio::{Level, Output};
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use {defmt_rtt as _, panic_probe as _};
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#[embassy_executor::main]
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async fn main(_spawner: Spawner) {
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let p = embassy_rp::init(Default::default());
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info!("Hello World!");
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// Example for resistive touch sensor in Waveshare Pico-ResTouch
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let miso = p.PIN_12;
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let mosi = p.PIN_11;
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let clk = p.PIN_10;
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let touch_cs = p.PIN_16;
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// create SPI
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let mut config = spi::Config::default();
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config.frequency = 2_000_000;
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let mut spi = Spi::new_blocking(p.SPI1, clk, mosi, miso, config);
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// Configure CS
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let mut cs = Output::new(touch_cs, Level::Low);
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loop {
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cs.set_low();
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let mut buf = [0x90, 0x00, 0x00, 0xd0, 0x00, 0x00];
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spi.blocking_transfer_in_place(&mut buf).unwrap();
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cs.set_high();
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let x = (buf[1] as u32) << 5 | (buf[2] as u32) >> 3;
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let y = (buf[4] as u32) << 5 | (buf[5] as u32) >> 3;
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info!("touch: {=u32} {=u32}", x, y);
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}
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}
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