flush lcd per 10ms

os/src/driver/lcd/mod.rs

@@ -84,7 +84,12 @@ lazy_static! {
 pub fn print_with_lcd(args: fmt::Arguments) {
     CONSOLE.lock().write_fmt(args).unwrap();
     unsafe {
-        CONSOLE.lock().render(&mut IMAGE);
+        CONSOLE.lock().render(&mut IMAGE);  
+    }
+}
+
+pub fn flush() {
+     unsafe {
         if CONSOLE.lock().dirty {
             DRIVER.lock().flush(&IMAGE);
             CONSOLE.lock().dirty = false;

os/src/driver/mod.rs

@@ -9,3 +9,4 @@ pub fn init() {
     // network::init();
 }
 pub use lcd::print_with_lcd;
+pub use lcd::flush;

os/src/timer.rs

@@ -1,4 +1,5 @@
 use crate::config::CLOCK_FREQ;
+use crate::driver::flush;
 use crate::scall_sbi::set_timer;
 use riscv::register::time;
 
@@ -15,4 +16,9 @@ pub fn get_time_ms() -> usize {
 
 pub fn set_next_trigger() {
     set_timer(get_time() + CLOCK_FREQ / TICKS_PER_SEC);
+    flush_at_10ms();
+}
+
+pub fn flush_at_10ms() {
+    flush();
 }