diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/lcd/st7565.c | 16 | ||||
| -rw-r--r-- | drivers/lcd/st7565.h | 4 |
2 files changed, 20 insertions, 0 deletions
diff --git a/drivers/lcd/st7565.c b/drivers/lcd/st7565.c index ee2661a5eb..49b13c00f1 100644 --- a/drivers/lcd/st7565.c +++ b/drivers/lcd/st7565.c @@ -31,6 +31,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. #define DISPLAY_ALL_ON 0xA5 #define DISPLAY_ALL_ON_RESUME 0xA4 #define NORMAL_DISPLAY 0xA6 +#define INVERT_DISPLAY 0xA7 #define DISPLAY_ON 0xAF #define DISPLAY_OFF 0xAE #define NOP 0xE3 @@ -72,6 +73,7 @@ uint8_t * st7565_cursor; ST7565_BLOCK_TYPE st7565_dirty = 0; bool st7565_initialized = false; bool st7565_active = false; +bool st7565_inverted = false; display_rotation_t st7565_rotation = DISPLAY_ROTATION_0; #if ST7565_TIMEOUT > 0 uint32_t st7565_timeout; @@ -429,6 +431,20 @@ __attribute__((weak)) void st7565_off_user(void) {} bool st7565_is_on(void) { return st7565_active; } +bool st7565_invert(bool invert) { + if (!st7565_initialized) { + return st7565_inverted; + } + + if (invert != st7565_inverted) { + spi_start(ST7565_SS_PIN, false, 0, ST7565_SPI_CLK_DIVISOR); + st7565_send_cmd(invert ? INVERT_DISPLAY : NORMAL_DISPLAY); + spi_stop(); + st7565_inverted = invert; + } + return st7565_inverted; +} + uint8_t st7565_max_chars(void) { return ST7565_DISPLAY_WIDTH / ST7565_FONT_WIDTH; } uint8_t st7565_max_lines(void) { return ST7565_DISPLAY_HEIGHT / ST7565_FONT_HEIGHT; } diff --git a/drivers/lcd/st7565.h b/drivers/lcd/st7565.h index 53cfc9a810..d453dbe6da 100644 --- a/drivers/lcd/st7565.h +++ b/drivers/lcd/st7565.h @@ -202,6 +202,10 @@ void st7565_task(void); // Called at the start of st7565_task, weak function overridable by the user void st7565_task_user(void); +// Inverts the display +// Returns true if the screen was or is inverted +bool st7565_invert(bool invert); + // Returns the maximum number of characters that will fit on a line uint8_t st7565_max_chars(void); |