Lorenzo Arrigoni
example with F411RE, DS1302 and LCD16x2
Dependencies: mbed DS1302 TextLCD
This is a simple example how to display date and time stored into a DS1302 module. I used a F411RE Nucleo board and a HD44780 LCD 16x2.
Revision 1:515786c57c45, committed 2021-06-15
- Comitter:
- loarri
- Date:
- Tue Jun 15 22:03:39 2021 +0000
- Parent:
- 0:2a445788550e
- Commit message:
- Example with F411RE, DS1302 and LCD16x2
Changed in this revision
| TextLCD.lib | Show annotated file Show diff for this revision Revisions of this file |
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TextLCD.lib Tue Jun 15 22:03:39 2021 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/loarri/code/TextLCD/#0f6a7dfba1a8
--- a/main.cpp Wed Jun 09 20:06:08 2021 +0000
+++ b/main.cpp Tue Jun 15 22:03:39 2021 +0000
@@ -1,11 +1,20 @@
/*
--------------------
+DS1302_test_with_STM32_and_LCD16x2
+
Author: L. Arrigoni
-May 2021
+June 2021
--------------------
-Simple test with RTC module and STM32F411RE Nucleo board.
+Simple test with RTC module driven by a STM32F411RE Nucleo board
+with 16x2 HD44780 LCD.
DS1302 powered by 3.3 V without pull up resistor on I2C lines
+with callback.
+I2C line for LCD needs 2 pullup resitors 2.2K on SDA e SCL
+D3 (SDA) ,D6 (SCL)
+
+Note: to reset/set the starting date supply the DS1302 with 5V
+
*/
@@ -19,22 +28,39 @@
#include "mbed.h"
#include "DS1302.h"
+#include "TextLCD.h"
+
DS1302 clk(SCLK, IO, CE);
+// Set LCD
+I2C i2c_lcd(D3 ,D6); // SDA, SCL
+// LCD instantiation
+TextLCD_I2C lcd(&i2c_lcd, 0x4E, TextLCD::LCD16x2);
int main() {
+ lcd.setBacklight(TextLCD::LightOn);
+ lcd.printf("Date&Time \nby L. Arrigoni");
+ wait(3);
+ lcd.cls();
+
#ifdef INITIAL_RUN
//clk.set_time(1256729737);
- clk.set_time(1623257900); //from https://www.unixtimestamp.com/
+ clk.set_time(1623792610); //from https://www.unixtimestamp.com/
#endif
char storedByte = clk.recallByte(0);
printf("\r\nStored byte was %d, now increasing by one\r\n", storedByte);
clk.storeByte(0, storedByte + 1);
-
+ char buffer[32],timebuf_dMyy[14];
while(1) {
time_t seconds = clk.time(NULL);
printf("Date and time: %s\r", ctime(&seconds));
+ strftime(buffer, 32, "%I:%M:%S %p\n", localtime(&seconds));
+ strftime(timebuf_dMyy, 14, "%d-%b-%Y", localtime(&seconds));
+ lcd.locate(0,0);
+ lcd.printf("Date:%s",timebuf_dMyy);
+ lcd.locate(0,1);
+ lcd.printf("Time:%s", buffer);
wait(1);
}
}