software/bios: switch to standard CRLF

Avoid setting terminal to "implicit CR in every LF" mode.

litex/build/sim/core/modules/serial2console/serial2console.c

@@ -72,7 +72,7 @@ void read_handler(int fd, short event, void *arg)
   struct session_s *s = (struct session_s*)arg;
   char buffer[1024];
   ssize_t read_len;
-  
+
   int i;
   read_len = read(fd, buffer, 1024);
   for(i = 0; i < read_len; i++) {
@@ -137,7 +137,7 @@ static int serial2console_add_pads(void *sess, struct pad_list_s *plist)
     litex_sim_module_pads_get(pads, "source_valid", (void**)&s->tx_valid);
     litex_sim_module_pads_get(pads, "source_ready", (void**)&s->tx_ready);
   }
-  
+
   if(!strcmp(plist->name, "sys_clk"))
     litex_sim_module_pads_get(pads, "sys_clk", (void**) &s->sys_clk);
 
@@ -154,8 +154,6 @@ static int serial2console_tick(void *sess) {
 
   *s->tx_ready = 1;
   if(*s->tx_valid) {
-    if(*s->tx == '\n')
-      printf("\r");
     printf("%c", *s->tx);
     fflush(stdout);
   }

litex/soc/software/libbase/console.c

@@ -25,6 +25,8 @@ int putchar(int c)
 	uart_write(c);
 	if(write_hook != NULL)
 		write_hook(c);
+	if (c == '\n')
+		putchar('\r');
 	return c;
 }
 

litex/tools/litex_term.py

@@ -152,8 +152,6 @@ class LiteXTerm:
         signal.signal(signal.SIGINT, self.sigint)
         self.sigint_time_last = 0
 
-        self.lf_insert = True
-
     def open(self, port, baudrate):
         if hasattr(self, "port"):
             return
@@ -261,21 +259,10 @@ class LiteXTerm:
 
     def reader(self):
         try:
-            c_last = 0
             while self.reader_alive:
                 c = self.port.read()
-                if c_last == b"\r":
-                    if c == b"\n":
-                        self.lf_insert = False
-                    else:
-                        self.lf_insert = True
-                c_last = c
-                if self.lf_insert and c == b"\r":
-                    sys.stdout.buffer.write(b"\n")
-                else:
-                    sys.stdout.buffer.write(c)
+                sys.stdout.buffer.write(c)
                 sys.stdout.flush()
-
                 if len(self.mem_regions):
                     if self.serial_boot and self.detect_prompt(c):
                         self.answer_prompt()