static uint16_t ao_lcd_time = 3;
+static __xdata uint8_t ao_lcd_mutex;
+
static void
ao_lcd_delay(void)
{
ao_lcd_port_put_nibble(0, ins & 0xf);
}
-void
+static void
ao_lcd_put_byte(uint8_t c)
{
// printf ("send data %02x\n", c);
{
char c;
+ ao_mutex_get(&ao_lcd_mutex);
while ((c = (uint8_t) *string++))
ao_lcd_put_byte((uint8_t) c);
+ ao_mutex_put(&ao_lcd_mutex);
}
#define AO_LCD_POWER_CONTROL 0x54
void
ao_lcd_contrast_set(uint8_t contrast)
{
+ ao_mutex_get(&ao_lcd_mutex);
ao_lcd_send_ins(AO_LCD_POWER_CONTROL | ((contrast >> 4) & 0x3));
ao_lcd_send_ins(0x70 | (contrast & 0xf));
+ ao_mutex_put(&ao_lcd_mutex);
}
void
ao_lcd_clear(void)
{
+ ao_mutex_get(&ao_lcd_mutex);
ao_lcd_send_ins(0x01);
ao_delay(1);
/* Entry mode */
ao_lcd_send_ins(0x04 | 0x02);
+ ao_mutex_put(&ao_lcd_mutex);
}
void
ao_lcd_goto(uint8_t addr)
{
+ ao_mutex_get(&ao_lcd_mutex);
ao_lcd_send_ins(0x80 | addr);
ao_lcd_send_ins(0x04 | 0x02);
+ ao_mutex_put(&ao_lcd_mutex);
}
void