Acrosser AR-R5800 Manuel d'utilisateur télécharger pdf (Page 57)

Revision: 1.2

Return Value: If the function gets the values successfully, it returns 0. If any error, it

returns –1.

4. Syntax:

i32 setChLevel( u8 val )

Description: Set the status bits of GPIO Output ports according to the variable ‘val’. The status

bits at the ports which are configured as input will not be affected.

Parameters: The parameter ‘val’ is an unsigned character. If a GPIO port is configured as an

Output port, a ‘1’ bit at ‘val’ directs the corresponding port to output a ‘1’. A ‘0’ bit directs this

port to output a ‘0’. If a GPIO ports is configured as an Input port, the setting to these input port

is ignored.

Return Value: If the function sets the values successfully, it returns 0. If any error, it

returns –1.

Watchdog

1. Syntax:

u8 getWtdTimer(void)

Description: This function read the value of the watchdog time counter and return it to the

caller.

Parameters: None.

Return Value: This function return the value of the time counter and return it to the caller as an

unsigned integer.

2. Syntax:

void setWtdTimer( u8 val )

Description: This function sets the watchdog timer register to the value ‘val’ and starts to count

down. The value could be 0 ~ 255. The unit is second. Setting the timer register to 0 disables

the watchdog function and stops the countdown.

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Acrosser AR-R5800 Manuel d'utilisateur Page 57