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ST7565 invert (#13237)

master
Ryan 2021-06-19 18:51:35 +10:00 committed by GitHub
parent 0311c8036d
commit 37fba09021
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3 changed files with 24 additions and 0 deletions
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4
docs/feature_st7565.md
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@ -262,6 +262,10 @@ void st7565_task(void);
// Called at the start of st7565_task, weak function overridable by the user // Called at the start of st7565_task, weak function overridable by the user
void st7565_task_user(void); 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 // Returns the maximum number of characters that will fit on a line
uint8_t st7565_max_chars(void); uint8_t st7565_max_chars(void);

16
drivers/lcd/st7565.c
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@ -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 0xA5
#define DISPLAY_ALL_ON_RESUME 0xA4 #define DISPLAY_ALL_ON_RESUME 0xA4
#define NORMAL_DISPLAY 0xA6 #define NORMAL_DISPLAY 0xA6
#define INVERT_DISPLAY 0xA7
#define DISPLAY_ON 0xAF #define DISPLAY_ON 0xAF
#define DISPLAY_OFF 0xAE #define DISPLAY_OFF 0xAE
#define NOP 0xE3 #define NOP 0xE3
@ -72,6 +73,7 @@ uint8_t * st7565_cursor;
ST7565_BLOCK_TYPE st7565_dirty = 0; ST7565_BLOCK_TYPE st7565_dirty = 0;
bool st7565_initialized = false; bool st7565_initialized = false;
bool st7565_active = false; bool st7565_active = false;
bool st7565_inverted = false;
display_rotation_t st7565_rotation = DISPLAY_ROTATION_0; display_rotation_t st7565_rotation = DISPLAY_ROTATION_0;
#if ST7565_TIMEOUT > 0 #if ST7565_TIMEOUT > 0
uint32_t st7565_timeout; 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_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_chars(void) { return ST7565_DISPLAY_WIDTH / ST7565_FONT_WIDTH; }
uint8_t st7565_max_lines(void) { return ST7565_DISPLAY_HEIGHT / ST7565_FONT_HEIGHT; } uint8_t st7565_max_lines(void) { return ST7565_DISPLAY_HEIGHT / ST7565_FONT_HEIGHT; }

4
drivers/lcd/st7565.h
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@ -202,6 +202,10 @@ void st7565_task(void);
// Called at the start of st7565_task, weak function overridable by the user // Called at the start of st7565_task, weak function overridable by the user
void st7565_task_user(void); 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 // Returns the maximum number of characters that will fit on a line
uint8_t st7565_max_chars(void); uint8_t st7565_max_chars(void);