93 lines
2.1 KiB
Rust
93 lines
2.1 KiB
Rust
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#![no_std]
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#![no_main]
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#![feature(trait_alias)]
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#![feature(min_type_alias_impl_trait)]
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#![feature(impl_trait_in_bindings)]
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#![feature(type_alias_impl_trait)]
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#[path = "../example_common.rs"]
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mod example_common;
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use embassy_stm32::gpio::{Level, Output, Input, Pull, NoPin};
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use embedded_hal::digital::v2::{OutputPin, InputPin};
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use example_common::*;
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use cortex_m_rt::entry;
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use stm32h7::stm32h743 as pac;
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use embassy_stm32::spi::{Spi, MODE_0, ByteOrder, Config};
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use embassy_stm32::time::Hertz;
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use embedded_hal::blocking::spi::Transfer;
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use stm32h7xx_hal::{rcc, prelude::*};
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use embassy_stm32::dac::{Dac, Value, Channel};
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#[entry]
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fn main() -> ! {
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info!("Hello World, dude!");
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let pp = pac::Peripherals::take().unwrap();
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let pwrcfg = pp.PWR.constrain()
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.freeze();
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let rcc = pp.RCC.constrain();
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let ccdr = rcc
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.sys_ck(96.mhz())
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.pclk1(48.mhz())
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.pclk2(48.mhz())
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.pclk3(48.mhz())
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.pclk4(48.mhz())
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.pll1_q_ck(48.mhz())
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.freeze(pwrcfg, &pp.SYSCFG);
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let pp = unsafe { pac::Peripherals::steal() };
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pp.DBGMCU.cr.modify(|_, w| {
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w.dbgsleep_d1().set_bit();
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w.dbgstby_d1().set_bit();
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w.dbgstop_d1().set_bit();
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w.d1dbgcken().set_bit();
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w
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});
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pp.RCC.apb1lenr.modify(|_, w|{
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w.dac12en().set_bit();
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w
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});
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pp.RCC.ahb4enr.modify(|_, w| {
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w.gpioaen().set_bit();
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w.gpioben().set_bit();
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w.gpiocen().set_bit();
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w.gpioden().set_bit();
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w.gpioeen().set_bit();
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w.gpiofen().set_bit();
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w
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});
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let p = embassy_stm32::init(Default::default());
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let mut dac = Dac::new(p.DAC1, p.PA4, NoPin);
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loop {
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for v in 0..=255 {
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dac.set(Channel::Ch1, Value::Bit8(to_sine_wave(v)));
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dac.trigger( Channel::Ch1 );
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}
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}
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}
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use micromath::F32Ext;
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fn to_sine_wave(v: u8) -> u8 {
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if v >= 128 {
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// top half
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let r = 3.14 * ( (v-128) as f32/ 128.0) ;
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(r.sin() * 128.0 + 127.0) as u8
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} else {
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// bottom half
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let r = 3.14 + 3.14 * (v as f32/ 128.0);
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(r.sin() * 128.0 + 127.0) as u8
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}
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}
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