21b64f5c28
- Add example for I2C display example for ESP32-C3 and ESP32 - Example works for ESP32-C3, but not yet for ESP32 - Dependent on patched and forked `esp-pacs` version (referenced relatively for now, please check out and place accordingly)
79 lines
1.9 KiB
Rust
79 lines
1.9 KiB
Rust
#![no_std]
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pub use embedded_hal as ehal;
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pub use esp_hal_common::{pac, prelude, Delay, Serial, Timer};
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#[cfg(not(feature = "normalboot"))]
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use riscv_rt::pre_init;
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pub mod gpio;
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pub mod i2c;
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pub mod rtc_cntl;
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pub use esp_hal_common::{interrupt, ram, Cpu};
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pub use self::{gpio::IO, i2c::I2C, rtc_cntl::RtcCntl};
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extern "C" {
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// Boundaries of the .iram section
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static mut _srwtext: u32;
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static mut _erwtext: u32;
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static mut _irwtext: u32;
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// Boundaries of the .bss section
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static mut _ebss: u32;
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static mut _sbss: u32;
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// Boundaries of the rtc .bss section
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static mut _rtc_fast_bss_start: u32;
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static mut _rtc_fast_bss_end: u32;
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// Boundaries of the .rtc_fast.text section
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static mut _srtc_fast_text: u32;
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static mut _ertc_fast_text: u32;
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static mut _irtc_fast_text: u32;
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// Boundaries of the .rtc_fast.data section
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static mut _rtc_fast_data_start: u32;
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static mut _rtc_fast_data_end: u32;
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static mut _irtc_fast_data: u32;
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}
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#[cfg(not(feature = "normalboot"))]
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#[pre_init]
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#[cfg(not(feature = "normalboot"))]
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#[doc(hidden)]
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unsafe fn init() {
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r0::init_data(&mut _srwtext, &mut _erwtext, &_irwtext);
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r0::init_data(
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&mut _rtc_fast_data_start,
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&mut _rtc_fast_data_end,
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&_irtc_fast_data,
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);
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r0::init_data(&mut _srtc_fast_text, &mut _ertc_fast_text, &_irtc_fast_text);
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}
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#[allow(unreachable_code)]
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#[export_name = "_mp_hook"]
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#[doc(hidden)]
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pub fn mp_hook() -> bool {
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unsafe {
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r0::zero_bss(&mut _rtc_fast_bss_start, &mut _rtc_fast_bss_end);
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}
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#[cfg(not(feature = "normalboot"))]
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return true;
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// no init data when using normal boot - but we need to zero out BSS
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unsafe {
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r0::zero_bss(&mut _sbss, &mut _ebss);
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}
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false
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}
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fn gpio_intr_enable(int_enable: bool, nmi_enable: bool) -> u8 {
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int_enable as u8 | ((nmi_enable as u8) << 1)
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}
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