Acrosser AR-B6051 User Manual

Page 53

Return Value: If the function gets the value successfully, it returns 0, any other returned value

stands for error.

1. Syntax:

i32 setChLevel(u8 val )

Description: Set the status of GPIO Output pins.

Parameters:

This function takes an unsigned char as the parameter. The bit0 ~ bit3 in variable ‘val’ represent the

status of the output pins. The bit3 ~ bit7 in the variable ‘val’ are of no use and can be neglected.

For example:

u8 val = 0xf;

i32 result;

result = setChLevel(val);

if(result != 0)

printf(“Fail to set GPIO!\n”);

Return Value: If the function sets the values successfully, it returns 0, any other returned value stands

for error.