First step in removing dependency on alloc crate
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parent
b85226aada
commit
657640d206
6 changed files with 43 additions and 27 deletions
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@ -10,6 +10,9 @@ lvgl = { path = "../lvgl" }
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lvgl-sys = { path = "../lvgl-sys" }
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embedded-graphics = "0.6"
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embedded-graphics-simulator = "0.2.0"
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heapless = "0.5.5"
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cstr_core = { version = "0.2.0" }
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typenum = "1.12.0"
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[[example]]
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name = "demo"
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@ -1,3 +1,4 @@
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use cstr_core::{CStr, CString};
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use embedded_graphics::pixelcolor::Rgb565;
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use embedded_graphics::prelude::*;
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use embedded_graphics_simulator::{
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@ -44,7 +45,7 @@ fn main() -> Result<(), LvError> {
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style_time.set_text_color(State::DEFAULT, Color::from_rgb((255, 255, 255)));
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time.add_style(Part::Main, style_time)?;
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time.set_align(&mut screen, Align::Center, 0, 0)?;
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time.set_text("20:46")?;
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time.set_text(CString::new("20:46").unwrap().as_c_str())?;
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time.set_width(240)?;
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time.set_height(240)?;
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@ -52,15 +53,29 @@ fn main() -> Result<(), LvError> {
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bt.set_width(50)?;
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bt.set_height(80)?;
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bt.set_recolor(true)?;
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bt.set_text("#5794f2 \u{F293}#")?;
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bt.set_text(CString::new("#5794f2 \u{F293}#").unwrap().as_c_str())?;
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bt.set_label_align(LabelAlign::Left)?;
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bt.set_align(&mut screen, Align::InTopLeft, 0, 0)?;
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fn set_text<S>(text: S) -> Result<(), ()>
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where
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S: AsRef<cstr_core::CStr>,
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{
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let _v: *const i8 = text.as_ref().as_ptr();
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Ok(())
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}
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let mut t: heapless::String<heapless::consts::U8> = heapless::String::from("test");
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t.push('\0').unwrap();
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set_text(CStr::from_bytes_with_nul(t.as_bytes()).unwrap()).unwrap();
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set_text(CStr::from_bytes_with_nul("test\0".as_bytes()).unwrap()).unwrap();
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set_text(cstr_core::CString::new("test").unwrap().as_c_str()).unwrap();
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let mut power = Label::new(&mut screen)?;
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power.set_recolor(true)?;
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power.set_width(80)?;
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power.set_height(20)?;
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power.set_text("#fade2a 20%#")?;
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power.set_text(CString::new("#fade2a 20%#").unwrap().as_c_str())?;
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power.set_label_align(LabelAlign::Right)?;
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power.set_align(&mut screen, Align::InTopRight, 0, 0)?;
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@ -83,7 +98,8 @@ fn main() -> Result<(), LvError> {
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if i > 59 {
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i = 0;
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}
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time.set_text(format!("21:{:02}", i).as_str())?;
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let val = format!("21:{:02}", i);
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time.set_text(CString::new(val.as_str()).unwrap().as_c_str())?;
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i = 1 + i;
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sleep(Duration::from_secs(1));
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@ -19,7 +19,7 @@ lazy_static! {
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("i32", "i32"),
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("u8", "u8"),
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("bool", "bool"),
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("* const cty :: c_char", "&str"),
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("* const cty :: c_char", "_"),
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]
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.iter()
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.cloned()
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@ -259,17 +259,11 @@ impl LvArg {
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}
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pub fn get_processing(&self) -> TokenStream {
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let ident = self.get_name_ident();
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// TODO: A better way to handle this, instead of `is_sometype()`, is using the Rust
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// type system itself.
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if self.typ.is_str() {
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quote! {
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let #ident = cstr_core::CString::new(#ident)?;
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}
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} else {
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// No need to pre-process this type of argument
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quote! {}
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}
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// No need to pre-process this type of argument
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quote! {}
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}
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pub fn get_value_usage(&self) -> TokenStream {
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@ -339,7 +333,7 @@ impl Rusty for LvType {
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match TYPE_MAPPINGS.get(self.literal_name.as_str()) {
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Some(name) => {
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let val = if self.is_str() {
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quote!(&str)
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quote!(&cstr_core::CStr)
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} else {
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let ident = format_ident!("{}", name);
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quote!(#ident)
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@ -573,8 +567,8 @@ mod test {
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let code = label_set_text.code(&parent_widget).unwrap();
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let expected_code = quote! {
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pub fn set_text(&mut self, text: &str) -> crate::LvResult<()> {
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let text = cstr_core::CString::new(text)?;
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pub fn set_text(&mut self, text: &cstr_core::CStr) -> crate::LvResult<()> {
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unsafe {
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lvgl_sys::lv_label_set_text(
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self.core.raw()?.as_mut(),
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@ -583,6 +577,7 @@ mod test {
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}
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Ok(())
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}
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};
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assert_eq!(code.to_string(), expected_code.to_string());
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@ -17,6 +17,8 @@ cty = "0.2.1"
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embedded-graphics = "0.6.2"
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cstr_core = { version = "0.2.0", default-features = false, features = ["alloc"] }
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bitflags = "1.2.1"
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heapless = "0.5.5"
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typenum = "1.12.0"
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[build-dependencies]
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quote = "1.0.7"
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@ -19,23 +19,21 @@ impl DisplayDriver {
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// Declare a buffer for the refresh rate
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// TODO: Make this an external configuration
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const REFRESH_BUFFER_LEN: usize = 2;
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let refresh_buffer1 = vec![
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Color::from_rgb((0, 0, 0)).raw;
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lvgl_sys::LV_HOR_RES_MAX as usize * REFRESH_BUFFER_LEN
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];
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const BUF_SIZE: usize = lvgl_sys::LV_HOR_RES_MAX as usize * REFRESH_BUFFER_LEN;
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let refresh_buffer2 = vec![
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Color::from_rgb((0, 0, 0)).raw;
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lvgl_sys::LV_HOR_RES_MAX as usize * REFRESH_BUFFER_LEN
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];
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let refresh_buffer1: [lvgl_sys::lv_color_t; BUF_SIZE] =
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[Color::from_rgb((0, 0, 0)).raw; BUF_SIZE];
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let refresh_buffer2: [lvgl_sys::lv_color_t; BUF_SIZE] =
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[Color::from_rgb((0, 0, 0)).raw; BUF_SIZE];
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// Create a display buffer for LittlevGL
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let mut display_buffer = MaybeUninit::<lvgl_sys::lv_disp_buf_t>::uninit();
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// Initialize the display buffer
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lvgl_sys::lv_disp_buf_init(
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display_buffer.as_mut_ptr(),
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Box::into_raw(refresh_buffer1.into_boxed_slice()) as *mut cty::c_void,
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Box::into_raw(refresh_buffer2.into_boxed_slice()) as *mut cty::c_void,
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Box::into_raw(Box::new(refresh_buffer1)) as *mut cty::c_void,
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Box::into_raw(Box::new(refresh_buffer2)) as *mut cty::c_void,
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lvgl_sys::LV_HOR_RES_MAX * REFRESH_BUFFER_LEN as u32,
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);
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let display_buffer = Box::new(display_buffer.assume_init());
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@ -12,6 +12,8 @@ pub enum LvError {
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InvalidReference,
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Uninitialized,
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InvalidNulByteString,
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StringSizeTooShort,
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StringCannotAppendNulByte,
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AlreadyInUse,
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}
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