AT&T Developer Summit Hackathon 2016
Freedom Seeed Grove 4-Digit Display Example
Dependencies: DigitDisplay mbed
Fork of
frdm_Grove_4-Digit-Display_Example
by 
Freescale
Simply Import this Program into your mbed compiler
Select Compile to generate the binary file
Plug the Grove Shield v2 on the top of your FRDM-K64F
Connect on end of the 4-pin Grove cable to the 4-digit display module and the other end to the port D2 of the Grove Adapter.
Drag n drop the frdm_Grove_4-Digit-Display_Example_K64F.bin into the mbed drive from your file explorer
Wait for download to complete
Press the Reset/SW1 button of your FRDM-K64F board to launch the program
The screen should start displaying a clock with time defined at 20:14 and middle dots blinking every seconds (see picture below)!!
Diff: main.cpp
- Revision:
- 0:06b1107d127e
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Jan 01 17:19:06 2016 +0000
@@ -0,0 +1,54 @@
+#include "mbed.h"
+#include "DigitDisplay.h"
+
+DigitalOut myled(LED1);
+
+DigitDisplay display(D2, D3);
+
+Ticker tick;
+
+uint8_t hour = 20;
+uint8_t minute = 14;
+uint8_t second = 0;
+
+void beat()
+{
+ static uint8_t colon = 0;
+
+ display.setColon(colon);
+ if (colon) {
+ second++;
+ if (second >= 60) {
+ second = 0;
+ minute++;
+ if (minute >= 60) {
+ minute = 0;
+
+ hour++;
+ if (hour >= 24) {
+ hour = 0;
+ }
+ display.write(0, hour / 10);
+ display.write(1, hour % 10);
+ }
+ display.write(2, minute / 10);
+ display.write(3, minute % 10);
+ }
+ }
+ colon = 1 - colon;
+}
+
+int main() {
+ display.write(0, hour / 10);
+ display.write(1, hour % 10);
+ display.write(2, minute / 10);
+ display.write(3, minute % 10);
+ display.setColon(true);
+ tick.attach(&beat, 0.5);
+ while(1) {
+ myled = 1;
+ wait(0.5);
+ myled = 0;
+ wait(0.5);
+ }
+}