Made the code look a bit less ugly

example.c

@@ -8,19 +8,12 @@
 //**********************************************************************
 //**********************************************************************
 
-#include <at89c55.h>
+#include <at89c51ed2.h>
 #include <stdio.h>
 #include <stdint.h>
 
 #define TICK_RATE 100
-#define NPER (0x10000 - (20000000 / 12 / TICK_RATE))
-
-// Missing port definitions
-__sbit __at (0xC4) P4_4;
-__sbit __at (0xC3) P4_3;
-__sbit __at (0xC2) P4_2;
-__sbit __at (0xC1) P4_1;
-__sbit __at (0xC0) P4_0;
+#define NPER (0x10000 - (20000000 / 6 / TICK_RATE))
 
 // I/O definitions
 #define BUTTON_1 P3_2
@@ -71,8 +64,7 @@ uint8_t lcd_pos;
 
 // Quick'n'dirty CPU pause, just enough for the LCD to stabilize.
 void lcd_pause(void) {
-	int i = 30;
-	while(i--);
+	__asm__ ("nop");
 }
 
 // Reads the status register from the LCD.
@@ -170,11 +162,8 @@ void lcd_init(void) {
 // Puts a character to the LCD. Correctly handles '\n'.
 void lcd_putchar(char c) {
 	if(c == 10) {
-		while((lcd_pos != 0) && (lcd_pos != 40)) {
-			lcd_send_data(32);
-			lcd_pos++;
-			if(lcd_pos == 80) lcd_pos=0;
-		}
+		if(lcd_pos < 40) lcd_pos = 40;
+		else lcd_pos = 0;
 	} else {
 		lcd_send_data(c);
 		lcd_pos++;
@@ -184,6 +173,8 @@ void lcd_putchar(char c) {
 
 // Initializes the background tick timer (for delays).
 void timer_init(void) {
+	CKCON0 = X2; // Enable 2x clock mode
+
 	// Initialize timer 0 as 16-bit countdown, timer 1 as 8-bit auto-reload countdown
 
 	TMOD = 0x21;
@@ -196,7 +187,8 @@ void timer_init(void) {
 
 	// Enable interrupts only for timer 0
 
-	IE = 0x82;
+	EA = 1;
+	ET0 = 1;
 }
 
 // Initializes the serial port (along with timer 2).
@@ -204,7 +196,7 @@ void serial_init(void) {
 	// Initialize timer 2 as 312500 Hz as the baud rate generator (for tulflash)
 
 	RCAP2H = 0xFF;
-	RCAP2L = 0xFE;
+	RCAP2L = 0xFC;
 	T2CON = 0x34;
 
 	// Initialize serial I/O
@@ -217,6 +209,7 @@ void serial_init(void) {
 void serial_putchar(char c) {
 	while(TI == 0);
 	SBUF = c;
+	TI = 0;
 }
 
 __bit stdout_to_lcd = 0;
@@ -296,6 +289,8 @@ void main(void) {
 	lcd_init();
 	serial_init();
 
+	delay(1);
+
 	stdout_to_serial = 1;
 	stdout_to_lcd = 1;
 

src/args.rs

@@ -57,6 +57,10 @@ pub struct ArgWrite {
 	#[argp(description = "Path to the source Intel HEX file.")]
 	pub path: OsString,
 
+	#[argp(option)]
+	#[argp(description = "Where to run the command. Will be created if it doesn't exist.")]
+	pub cmd_path: Option<std::path::PathBuf>,
+
 	#[argp(option)]
 	#[argp(description = "Command to run before writing the file. Handy for compiling the program and running it at the same time.")]
 	pub cmd: Option<OsString>,
@@ -102,7 +106,7 @@ pub struct ArgMonitor {}
 pub struct ArgRun {
 	#[argp(positional)]
 	#[argp(description = "Path to the source C file.")]
-	pub path: OsString
+	pub path: std::path::PathBuf
 }
 
 #[derive(FromArgs)]

src/main.rs

@@ -204,16 +204,23 @@ fn write_chip_data(args: &ArgWrite, target: &mut PhysicalTarget) -> Result<(), E
 fn write_chip(args: ArgWrite, target: &mut PhysicalTarget) -> Result<(), Error> {
 	loop {
 		if let Some(cmd) = args.cmd.as_ref() {
+			let cmd_path = &args.cmd_path;
 			let mut args = shlex::bytes::split(cmd.as_encoded_bytes())
 				.ok_or(Error::other("Error parsing commandline arguments"))?
 				.into_iter()
 				.map(|x| unsafe { OsString::from_encoded_bytes_unchecked(x) });
 
+			if let Some(cmd_path) = cmd_path {
+				if !cmd_path.is_dir() {
+					Err(Error::other("invalid cmd path (not a dir)"))?
+				}
+			}
 			let Some(name) = args.next() else {
 				Err(Error::other("No command provided"))?
 			};
 
 			let out = std::process::Command::new(name)
+				.current_dir(cmd_path.as_ref().map(|p| p.as_path()).unwrap_or(&std::path::Path::new(".")))
 				.args(args)
 				.output()?;
 
@@ -257,11 +264,21 @@ fn monitor_chip(_args: ArgMonitor, target: &mut PhysicalTarget) -> Result<(), Er
 }
 
 fn run_chip(args: ArgRun, target: &mut PhysicalTarget) -> Result<(), Error> {
-	let path = PathBuf::from(&args.path).with_extension("ihx").into_os_string();
-	let cmd = Some(OsString::from(format!("sdcc \"{}\"", unsafe { String::from_utf8_unchecked(args.path.into_encoded_bytes()) })));
+	let build_dir = args.path.parent().unwrap().join("tulflash");
+
+	let source_file_name = args.path.file_name().ok_or(Error::other("invalid path to compilation source"))?;
+	let source_file = build_dir.join(&source_file_name);
+	let output_file = source_file.with_extension("ihx");
+
+	let cmd = Some(OsString::from(format!("sdcc \"{}\"", source_file_name.to_string_lossy())));
+	let cmd_path = Some(build_dir.clone());
+
+	std::fs::create_dir_all(build_dir)?;
+	std::fs::copy(args.path, &source_file)?;
 
 	write_chip(ArgWrite {
-		path,
+		path: output_file.into_os_string(),
+		cmd_path,
 		cmd,
 		start: 0,
 		end: 65535,