aiptek_command
if ((ret = aiptek_command(aiptek, 0x11, 0x02)) < 0)
if ((ret = aiptek_command(aiptek, 0x17, 0x00)) < 0)
if ((ret = aiptek_command(aiptek, 0x12, 0xff)) < 0)
if (aiptek_command(aiptek, command, data) != 0) {
if ((ret = aiptek_command(aiptek, 0x18, 0x04)) < 0)
if ((ret = aiptek_command(aiptek, 0x10, 0x01)) < 0) {
if ((ret = aiptek_command(aiptek, 0x10, 0x00)) < 0) {