stm32f0: usart: add code to enable USART 2

include/console.h

@@ -6,4 +6,4 @@ struct usart_console;
 
 typedef void (* process_line_func)(FILE *fp);
 
-FILE *console_init(process_line_func process_line);
+FILE *console_init(unsigned dev_id, process_line_func process_line);

source/drivers/usart_console.c

@@ -46,9 +46,8 @@ static void usart_isr(struct usart_console *console)
 		if (console->recv_buf[idx] == '\003')
 			scb_reset_system();
 
-		if (console->recv_buf[idx] == '\r' && console->process_line) {
+		if (console->recv_buf[idx] == '\r' && console->process_line)
 			console->process_line(console->fp);
-		}
 	}
 }
 
@@ -169,7 +168,7 @@ static int usart_init(struct usart_console *console)
 	return 0;
 }
 
-FILE *console_init(void (* process_line)(FILE *fp))
+FILE *console_init(unsigned dev_id, void (* process_line)(FILE *fp))
 {
 	cookie_io_functions_t fops = {
 		.read = usart_read,
@@ -182,11 +181,16 @@ FILE *console_init(void (* process_line)(FILE *fp))
 	if (!(console = malloc(sizeof *console)))
 		return NULL;
 
-	console->dev = USART1;
+	switch (dev_id) {
+	case 0: console->dev = USART1; break;
+	case 1: console->dev = USART2; break;
+	default: return NULL;
+	}
+
 	console->cur = 0;
 	console->next = 0;
 	console->process_line = process_line;
-	usart[0] = console;
+	usart[dev_id] = console;
 
 	usart_init(console);