Portwell RUBY-D716VG2AR - Page 36

System Installation
RUBY-D716VG2AR User’s Manual 3-18
tmp =
EC_GetRamByte(EC_PIN8_CTL_ADDR);
tmp = 0x40;
tmp &= ~0x80;
EC_SetRamByte(EC_PIN8_CTL_ADDR,
tmp);
}
break;
default:
printf("invalid pin number when writing to
gpio\n");
}
return 0;
}
int gpio_setdirection (unsigned char io_direction)
{
unsigned char data;
int i;
for (i = 0; i < 8; i++)
gpio_setpindirection (gpio_set, i+1, (io_direction & (0x01 <<
i)));
return 0;
}
int gpio_readpindirection (int pin_num, unsigned char *io_direction)
{
unsigned char data;
unsigned char tmp;
switch(pin_num)
{
case 1:
tmp = EC_GetRamByte(EC_PIN1_CTL_ADDR);
if( tmp & 0x80 ) /* means in */
*io_direction = 1;
else if ( tmp & 0x40 ) /* means out */
*io_direction = 0;
else
printf("unknown GPIO pin direction in
EC\n");
break;
case 2:
tmp = EC_GetRamByte(EC_PIN2_CTL_ADDR);