143 lines
3.5 KiB
Rust
143 lines
3.5 KiB
Rust
#![no_std]
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#![feature(asm, used, const_fn, naked_functions, alloc, box_syntax)]
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#![no_main]
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#![feature(extern_prelude)]
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#[macro_use]
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extern crate hcl;
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#[macro_use]
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extern crate alloc;
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use core::mem;
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use hcl::platform::gpio;
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use hcl::platform::irq;
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use hcl::platform::rcc;
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use hcl::platform::scs;
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use hcl::platform::timer;
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use hcl::platform::usart;
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use hcl::platform::dma;
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use hcl::dma::*;
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mod systick;
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mod printer;
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mod max6675;
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use printer::UsartPrinter;
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fn configure_clocks(rcc: &mut rcc::RCC) {
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rcc.clock_control.set_hse_on(true);
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while !rcc.clock_control.hse_ready() {}
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rcc.clock_config
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.configure(|c| {
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c.set_pll_multiplier(10)
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.set_pll_source(rcc::PllSource::HsiDiv2)
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});
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rcc.clock_control.set_pll_on(true);
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while !rcc.clock_control.pll_ready() {}
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rcc.clock_config
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.switch_clock_source(rcc::SystemClockSource::Pll);
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}
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hcl_ivt!{
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systick => systick::isr;
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}
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fn configure_peripherals(rcc: &mut hcl::platform::rcc::RCC,
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gpio_a: &mut gpio::GPIO,
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gpio_c: &mut gpio::GPIO,
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usart: &mut usart::USART) {
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rcc.apb2_enable
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.configure(|a| a.set_gpio_a(true).set_gpio_c(true).set_spi1(true));
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rcc.apb1_enable.configure(|a| a.set_usart2(true));
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gpio_a.configure(|g| {
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g.set_mode(2, gpio::PinMode::Output50MHz)
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.set_output_config(2, gpio::OutputConfig::AfPushPull)
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.set_mode(3, gpio::PinMode::Output50MHz)
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.set_output_config(3, gpio::OutputConfig::AfPushPull)
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// SCK1
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.set_mode(5, gpio::PinMode::Output50MHz)
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.set_output_config(5, gpio::OutputConfig::AfPushPull)
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// MOSI1
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.set_mode(7, gpio::PinMode::Output50MHz)
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.set_output_config(7, gpio::OutputConfig::AfPushPull)
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// MISO1
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.set_mode(6, gpio::PinMode::Input)
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.set_input_config(6, gpio::InputConfig::PullUpDown)
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// ???
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.set_mode(4, gpio::PinMode::Output50MHz)
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.set_output_config(4, gpio::OutputConfig::PushPull)
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// SS MAX6675
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.set_mode(9, gpio::PinMode::Output50MHz)
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.set_output_config(9, gpio::OutputConfig::PushPull)
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});
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gpio_c.configure(|g| {
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g.set_mode(13, gpio::PinMode::Output50MHz)
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.set_output_config(13, gpio::OutputConfig::PushPull)
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});
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usart.configure(|u| {
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u.set_enabled(true)
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.set_tx_enabled(true)
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.set_baudgen((21, 11))
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}); // 115.2 kbaud
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}
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// allowing inlining into main() breaks the stack, since main() must be naked to set up a process stack.
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#[inline(never)]
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fn run(mut scs: scs::Instance, mut p: hcl::platform::Instance) {
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configure_clocks(&mut p.rcc);
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systick::configure(&mut scs.systick);
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configure_peripherals(&mut p.rcc, &mut p.gpio_a, &mut p.gpio_c, &mut p.usart2);
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let mut printer = UsartPrinter::init(p.usart2);
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let spi = &mut p.spi1;
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let gpio = &mut p.gpio_a;
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loop {
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let res = max6675::read(spi, gpio, 9);
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let msg = match res {
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Ok(temp) => format!("> {}\r\n", temp).into_bytes(),
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Err(err) => format!("Error > {}\r\n", err).into_bytes(),
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};
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printer.print(msg);
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let old = p.gpio_c.output();
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p.gpio_c.set_output(old ^ (1<<13));
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systick::delay_ms(1000);
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}
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}
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entry_point!(main);
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fn main(scs: scs::Instance, p: hcl::platform::Instance) {
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declare_thread_stack!(stack, 3072);
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unsafe {
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hcl::set_process_stack(&stack);
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hcl::use_process_stack(true);
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}
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run(scs, p);
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}
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