mirror of
https://github.com/esp-rs/esp-hal.git
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db409ffe7b
* Unify the system peripheral Whilst the PCR, SYSTEM and DPORT peripherals are different, we currently use them all in the same way. This PR unifies the peripheral name in the hal to `SYSTEM`. The idea is that they all do the same sort of thing, so we can collect them under the same name, and later down the line we can being to expose differences under an extended API. The benifits to this are imo quite big, the examples now are all identical, which makes things easier for esp-wifi, and paves a path towards the multichip hal. Why not do this in the PAC? Imo the pac should be as close to the hardware as possible, and the HAL is where we should abstractions such as this. * changelog
97 lines
2.8 KiB
Rust
97 lines
2.8 KiB
Rust
//! This shows example usage of the CRC functions in ROM
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#![no_std]
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#![no_main]
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use core::fmt::Write;
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use esp32h2_hal::{
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clock::ClockControl,
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peripherals::Peripherals,
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prelude::*,
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rom::{crc, md5},
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timer::TimerGroup,
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Uart,
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};
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use esp_backtrace as _;
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use nb::block;
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#[entry]
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fn main() -> ! {
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let peripherals = Peripherals::take();
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let system = peripherals.SYSTEM.split();
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let clocks = ClockControl::boot_defaults(system.clock_control).freeze();
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let mut uart0 = Uart::new(peripherals.UART0, &clocks);
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let timer_group0 = TimerGroup::new(peripherals.TIMG0, &clocks);
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let mut timer0 = timer_group0.timer0;
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timer0.start(1u64.secs());
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let data = "123456789";
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let sentence = "The quick brown fox jumps over a lazy dog";
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writeln!(
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uart0,
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"Performing CRC calculations on test string \"{data}\""
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)
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.unwrap();
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loop {
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let crc_hdlc = crc::crc32_le(!0xffffffff, data.as_ref());
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let crc_bzip2 = crc::crc32_be(!0xffffffff, data.as_ref());
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let crc_mpeg2 = !crc::crc32_be(!0xffffffff, data.as_ref());
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let crc_cksum = crc::crc32_be(!0, data.as_ref());
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let crc_kermit = !crc::crc16_le(!0, data.as_ref());
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let crc_genibus = crc::crc16_be(!0xffff, data.as_ref());
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let crc_rohc = !crc::crc8_le(!0xff, data.as_ref());
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let crc_smbus = !crc::crc8_be(!0, data.as_ref());
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assert_eq!(crc_hdlc, 0xcbf43926);
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assert_eq!(crc_bzip2, 0xfc891918);
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assert_eq!(crc_mpeg2, 0x0376e6e7);
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assert_eq!(crc_cksum, 0x765e7680);
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assert_eq!(crc_kermit, 0x2189);
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assert_eq!(crc_genibus, 0xd64e);
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assert_eq!(crc_rohc, 0xd0);
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assert_eq!(crc_smbus, 0xf4);
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// Hash the sentence one word at a time to *really* test the context
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// Use Peekable while iter_intersperse is unstable
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let mut md5_ctx = md5::Context::new();
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let mut it = sentence.split_whitespace().peekable();
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while let Some(word) = it.next() {
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md5_ctx.consume(word);
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if it.peek().is_some() {
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md5_ctx.consume(" ");
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}
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}
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let md5_digest = md5_ctx.compute();
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assert_eq!(
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md5_digest,
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md5::Digest([
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0x30, 0xde, 0xd8, 0x07, 0xd6, 0x5e, 0xe0, 0x37, 0x0f, 0xc6, 0xd7, 0x3d, 0x6a, 0xb5,
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0x5a, 0x95
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])
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);
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writeln!(
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uart0,
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"{:08x} {:08x} {:08x} {:08x} {:04x} {:04x} {:02x} {:02x} {}",
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crc_hdlc,
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crc_bzip2,
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crc_mpeg2,
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crc_cksum,
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crc_kermit,
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crc_genibus,
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crc_rohc,
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crc_smbus,
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md5_digest
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)
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.unwrap();
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block!(timer0.wait()).unwrap();
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}
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}
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