UM1632 datasheet(10/32 Pages) STMICROELECTRONICS

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Function description

UM1632

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Function description

This section describes the most important STM8L DALI slave library functions for the user.

3.1

I/O pin driver layer functions

The I/O pin driver layer implements hardware dependent functions (designed for use with

STM8L devices and the DALI transceiver board).

3.1.1

STM8l15x_it.c

These files contain two interrupt service routines (ISR):

Table 1. Void SysTick_Handler(void)

Function name

SysTick_Handler

Description

•

Calls receiving routines if there is a voltage level change on the DALI

RX pin

•

Detects the start of the DALI packet. This ISR is inactive during DALI

packet reception. It is activated after DALI packet reception.

Input Parameter

None

Output Parameter

None

Return

None

Table 2. Void EXTI0_IRQHandler(void)

Function name

EXTI0_IRQHandler

Description

•

Generates timer ticks for the DALI bit receive and transmit functions

•

Calls the transmit/receive function in given intervals (sampling is eight

times per DALI bit).

•

Generates timer ticks for the upper DALI layer timing by calling

callback functions from the DALI stack layer.

•

Checks for DALI interface failure such as loss of voltage on the DALI

bus for more than 500 ms (disconnection from DALI bus).

Input Parameter

None

Output Parameter

None

Return

None

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