Acrosser AR-B6051 - Manual (Page 52)

For example:
struct CanFilter varFilter;
i32 result;
varFilter.filterId = 3;
varFilter.filterType = STD_ID;
varFilter.filter = 0x555;
result = setCanFilter(&varFilter);
if( result != 0)
printf(“Fail to set up the filter!\n”);
Return Value: If this function sets the filter successfully, it returns 0, any other returned value
stands for error.
6.3.2 GPIO and Watchdog
6.3.2.1 GPIO
1. Syntax:
i32 getChLevel(u8 *val )
Description: Get the status of GPIO input pins and output pins, and put the value at *val.
Parameters:
This function takes a pointer to an unsigned char variable as the parameter.
The bit0 ~ bit3 in the pointed variable ‘*val’ is the status of the output pins. The bit4 ~ bit7 in the
pointed variable ‘*val’ is the status of the input pins.
For example:
u8 val;
i32 result;
result = getChLevel( &val);
if(result != 0)
printf(“Fail to get GPIO status!\n”);
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