60 lines
2.0 KiB
Rust
60 lines
2.0 KiB
Rust
#![no_std]
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#![no_main]
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#![deny(
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clippy::mem_forget,
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reason = "mem::forget is generally not safe to do with esp_hal types, especially those \
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holding buffers for the duration of a data transfer."
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)]
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use esp_hal::i2c::master::BusTimeout;
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use esp_hal::{
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clock::CpuClock,
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gpio::{Level, Output, OutputConfig},
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main,
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time::{Duration, Instant},
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};
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use fugit::RateExtU32;
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#[panic_handler]
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fn panic(_: &core::panic::PanicInfo) -> ! {
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loop {}
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}
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// This creates a default app-descriptor required by the esp-idf bootloader.
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// For more information see: <https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-reference/system/app_image_format.html#application-description>
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esp_bootloader_esp_idf::esp_app_desc!();
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#[main]
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fn main() -> ! {
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// generator version: 0.5.0
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esp_println::logger::init_logger_from_env();
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let config = esp_hal::Config::default().with_cpu_clock(CpuClock::max());
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let peripherals = esp_hal::init(config);
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let i2c_config = esp_hal::i2c::master::Config::default().with_timeout(BusTimeout::Maximum);
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let mut i2c = esp_hal::i2c::master::I2c::new(peripherals.I2C0, i2c_config)
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.unwrap()
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.with_sda(peripherals.GPIO21)
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.with_scl(peripherals.GPIO22);
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let mut led = Output::new(peripherals.GPIO2, Level::High, OutputConfig::default());
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loop {
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log::info!("Scanning for I2C devices..");
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for i in 0..=127u8 {
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let res = i2c.read(i, &mut [0]);
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match res {
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Ok(_) => {
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log::info!("Device found at address: {}", i);
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}
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Err(err) => {
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log::warn!("Failed to read device address: {:?}", err);
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}
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}
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}
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led.toggle();
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let delay_start = Instant::now();
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while delay_start.elapsed() < Duration::from_millis(500) {}
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}
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// for inspiration have a look at the examples at https://github.com/esp-rs/esp-hal/tree/esp-hal-v1.0.0-rc.0/examples/src/bin
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}
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