From a7e4d8f4ea7afe49b8e80c3b57f036c2a30ab196 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?King=20K=C3=A9vin?= <kingkevin@cuvoodoo.info>
Date: Mon, 25 Jan 2016 10:29:32 +0100
Subject: [PATCH] display typed text

---
 main.c | 31 ++++++++++++++++++-------------
 1 file changed, 18 insertions(+), 13 deletions(-)

diff --git a/main.c b/main.c
index c944810..b3752d9 100644
--- a/main.c
+++ b/main.c
@@ -85,26 +85,31 @@ int main(void)
 	}
 	vfd_clear(); // clear all data
 
-	bool vfd_flag = false;
-	for (uint8_t i=0; i<VFD_DIGITS; i++) {
-		vfd_digit(i,'0'+i);
-	}
-	for (uint8_t i=0; i<VFD_MATRIX; i++) {
-		vfd_matrix(i,'A'+i);
-	}
+	uint8_t vfd_place = 0; // the place on which the next character will be displayed on the VFD
+	bool vfd_flag = false; // do something with the VFD
+	char c = 0; // the character to display
 	while (true) {
 		while (usart_received) { // echo every received character
-			printf("%c",usart_getchar()); // transmit receive character
-			vfd_flag = true;
+			c = usart_getchar();
+			vfd_flag = true; // display character
 		}
 		while (cdcacm_received) { // echo every received character
-			printf("%c",cdcacm_getchar()); // transmit receive character
-			vfd_flag = true;
+			c = cdcacm_getchar();
+			vfd_flag = true; // display character
 		}
 		while (vfd_flag) {
 			vfd_flag = false;
-			gpio_toggle(LED_PORT, LED_PIN); // toggle LED
-		}
+				printf("%c", c); // transmit receive character
+			gpio_toggle(LED_PORT, LED_PIN); // toggle LED to show activity
+			if (c=='\r' || c=='\n') { // on newline
+				vfd_clear(); // clear display
+				vfd_place = 0; // restart from beginning
+			} else {
+				vfd_digit(vfd_place,c); // display character on digit
+				vfd_matrix(vfd_place,c); // display character on matrix
+				vfd_place++; // go to next place
+			}
+		}	
 		__WFI(); // go to sleep
 	}