usart: add CONFIG_USER_ECHO option

source/platform/usart.c

@@ -107,21 +107,28 @@ int console_getline(struct console *console_, char *buf, size_t n)
 	while (console_getc(&c, console_) == 0) {
 		switch (c) {
 		case '\r':
+#if CONFIG_USER_ECHO
 			usart_send_blocking(console->dev, '\r');
+#endif
 			return 0;
 		case 10:
 		case 127:
 			if (buf < p) {
+#if CONFIG_USER_ECHO
 				usart_send_blocking(console->dev, '\010');
 				usart_send_blocking(console->dev, ' ');
 				usart_send_blocking(console->dev, '\010');
+#endif
+
 				--p;
 			}
 
 			break;
 		default:
 			*p = c;
+#if CONFIG_USER_ECHO
 			usart_send_blocking(console->dev, c);
+#endif
 
 			if (((size_t)p - (size_t)buf) < n) {
 				++p;
@@ -156,9 +163,11 @@ ssize_t console_read(struct console *console_, char *buf, size_t n)
 		case 10:
 		case 127:
 			if (buf < p) {
+#if CONFIG_USER_ECHO
 				usart_send_blocking(console->dev, '\010');
 				usart_send_blocking(console->dev, ' ');
 				usart_send_blocking(console->dev, '\010');
+#endif
 				--p;
 			}
 
@@ -170,7 +179,9 @@ ssize_t console_read(struct console *console_, char *buf, size_t n)
 				goto out;
 
 			*p++ = '\n';
+#if CONFIG_USER_ECHO
 			usart_send_blocking(console->dev, '\r');
+#endif
 			console_getc(&c, console_);
 			goto out;
 		default:
@@ -178,7 +189,9 @@ ssize_t console_read(struct console *console_, char *buf, size_t n)
 				goto out;
 
 			*p++ = c;
+#if CONFIG_USER_ECHO
 			usart_send_blocking(console->dev, c);
+#endif
 			console_getc(&c, console_);
 			break;
 		}

source/shell/mufs.c

@@ -204,11 +204,16 @@ int shell_write(struct console *con, size_t argc, const char **argv)
 		return -1;
 	}
 
+#if CONFIG_USER_ECHO
 	fprintf(con->fp, "> ");
+#endif
 
 	while ((ret = console_read(con, data, sizeof data)) > 0) {
 		mufs_write(file, data, ret);
+
+#if CONFIG_USER_ECHO
 		fprintf(con->fp, "\n> ");
+#endif
 	}
 
 	mufs_close(file);