cmd_clear
hd44780_ir_write(sc, en, cmd_clear());
hd44780_ir_write(sc, en, cmd_clear());
hd44780_ir_write(sc, en, cmd_clear());
hd44780_ir_write(sc, en, cmd_clear());
uint8_t cmd_clear;
uint8_t cmd_clear;
mbin->cmd_clear = 0x80;
mbin->cmd_clear = 0x80;
{"clear", cmd_clear},
void cmd_clear(int, char **);