mirror of
https://github.com/esp-rs/esp-idf-hal.git
synced 2025-10-01 06:11:16 +00:00
3f532d7224
* overhaul UART to support single wire trasimitters/receivers * add missing methods for uart transmitter/receiver * fix `uart_config_t`'s `source_clk` being part of a union in `esp-idf v4.x` * add `esp32c2`'s `PLL F40M` `APB` clock * revert `uart_wait_tx_done` to timeout of 0 * fix incorrect order in `uart_driver_install`, `rx_buffer` shou always exceed `UART_FIFO_SIZE` * Refactor `Owner` enum * Fix double drop on `into_split` * Add missing `count` methods for the UART drivers, change their return to be able to fit the maximum allowed value, don't run `drop` on temporary internal borrows, update example
46 lines
1.1 KiB
Rust
46 lines
1.1 KiB
Rust
//! UART loopback test
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//!
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//! Folowing pins are used:
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//! TX GPIO5
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//! RX GPIO6
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//!
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//! Depending on your target and the board you are using you have to change the pins.
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//!
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//! This example transfers data via UART.
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//! Connect TX and RX pins to see the outgoing data is read as incoming data.
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use esp_idf_hal::delay::BLOCK;
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use esp_idf_hal::gpio;
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use esp_idf_hal::peripherals::Peripherals;
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use esp_idf_hal::prelude::*;
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use esp_idf_hal::uart::*;
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fn main() -> anyhow::Result<()> {
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esp_idf_sys::link_patches();
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let peripherals = Peripherals::take().unwrap();
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let tx = peripherals.pins.gpio5;
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let rx = peripherals.pins.gpio6;
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println!("Starting UART loopback test");
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let config = config::Config::new().baudrate(Hertz(115_200));
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let uart = UartDriver::new(
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peripherals.uart1,
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tx,
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rx,
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Option::<gpio::Gpio0>::None,
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Option::<gpio::Gpio1>::None,
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&config,
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)
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.unwrap();
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loop {
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uart.write(&[0xaa])?;
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let mut buf = [0_u8; 1];
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uart.read(&mut buf, BLOCK)?;
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println!("Written 0xaa, read 0x{:02x}", buf[0]);
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}
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}
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