GD.c
// write 1 byte to a certain address
write 1 byte to a certain address
write 1 byte to a certain address
void vis_gd_wr(unsigned int addr, byte v)
{
  vis_gd_wstart(addr);
  vis_spi_transfer(v);
  vis_gd_end();
}
void vis_gd_wr ( unsigned int addr , byte v ) { vis_gd_wstart ( addr ) ; vis_spi_transfer ( v ) ; vis_gd_end ( ) ; }
write 1 byte to a certain address
write 1 byte to a certain address