870fa8c7cd
* add input debounce code from old fw * exampl of input api * change input API to get/release * revert input API to read * pointer instead of instance * add input API description * add display API * rewrite display names * migrate to valuemanager * add links * little changes * add LED API * add closing brakets * add sound api * change format * Delete input.c * Delete input.h * change format
1.8 KiB
1.8 KiB
All display operations based on u8g2 library.
API available as struct, contains u8g2 functions, instance and fonts:
typedef struct {
ValueManager* display; /// ValueManager<u8g2_t*>
void (*u8g2_SetFont)(u8g2_t *u8g2, const uint8_t *font);
void (*u8g2_SetDrawColor)(u8g2_t *u8g2, uint8_t color);
void (*u8g2_SetFontMode)(u8g2_t *u8g2, uint8_t is_transparent);
u8g2_uint_t (*u8g2_DrawStr)(u8g2_t *u8g2, u8g2_uint_t x, u8g2_uint_t y, const char *str);
Fonts fonts;
} Display;
typedef struct {
const uint8_t* u8g2_font_6x10_mf;
} Fonts;
First of all you can open display API instance by calling open_display
/// Get display instance and API
inline Display* open_display(const char* name) {
return (Display*)furi_open(name);
}
Default display name is /dev/display.
For draw something to display you can get display instance pointer by calling take_display, do something and commit your changes by calling commit_display:
/// return pointer in case off success, NULL otherwise
inline u8g2_t* take_display(Display* api, uint32_t timeout) {
return (u8g2_t*)take_mutex(api->display->value, timeout);
}
inline void commit_display(Display* api, u8g2_t* display) {
commit_valuemanager(api->display, display);
}
Usage example
void u8g2_example(void* p) {
Display* display_api = open_display("/dev/display");
if(display_api == NULL) return; // display not available, critical error
u8g2_t* display = take_display(display_api);
if(display != NULL) {
display_api->u8g2_SetFont(display, display_api->fonts.u8g2_font_6x10_mf);
display_api->u8g2_SetDrawColor(display, 1);
display_api->u8g2_SetFontMode(display, 1);
display_api->u8g2_DrawStr(display, 2, 12, "hello world!");
}
commit_display(display_api, display);
}