diff options
Diffstat (limited to 'src/drivers/ao_lcd.c')
| -rw-r--r-- | src/drivers/ao_lcd.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/drivers/ao_lcd.c b/src/drivers/ao_lcd.c index e62247ae..8745b3f6 100644 --- a/src/drivers/ao_lcd.c +++ b/src/drivers/ao_lcd.c @@ -19,6 +19,8 @@ static uint16_t ao_lcd_time = 3; +static __xdata uint8_t ao_lcd_mutex; + static void ao_lcd_delay(void) { @@ -39,7 +41,7 @@ ao_lcd_send_ins(uint8_t ins) ao_lcd_port_put_nibble(0, ins & 0xf); } -void +static void ao_lcd_put_byte(uint8_t c) { // printf ("send data %02x\n", c); @@ -54,8 +56,10 @@ ao_lcd_putstring(char *string) { 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 @@ -63,24 +67,30 @@ ao_lcd_putstring(char *string) 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 |