AN3114 datasheet(39/43 Pages) STMICROELECTRONICS

Part #	AN3114

Description	This application note describes techniques for connecting

PDF	43 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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39 / 43 page

AN3114

LCD segment drive firmware

Doc ID 16829 Rev 3

39/43

Figure 27.

LCD segment drive software flowchart

Note:

STM8L1528-EVAL: before displaying the default time, the “STM” string is displayed on the

LCD dot matrix and the ST logo segment is ON.

Start

Clock Configuration (RTC,LCD,TIM4)

RTC Configuration (Generate wake-up every 0.5s)

EXTI and ITC configuration (Interrupt priority)

LCD Configuration

Calendar Configuration

Timer4 configuration to generate update each 1ms

Display default Time 00’00’00

Check LCD Position

Calendar Configuration

Check Key status

Increment the current

LCD Position value

Toggle the LCD

position

Released

Pressed

Disable Timer4 & EXTI

Interrupts on the key button

Regulate the Time and Enable

RTC

Display the current Time on

LCD Glass

Enter the active Halt mode

Wake-up generated by RTC every 0.5 s

ai17249

AN3114 Datasheet(PDF) 39 Page - STMicroelectronics