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Diffstat (limited to 'src/DisplayApp/lv_port_disp.cpp')
| -rw-r--r-- | src/DisplayApp/lv_port_disp.cpp | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/src/DisplayApp/lv_port_disp.cpp b/src/DisplayApp/lv_port_disp.cpp new file mode 100644 index 00000000..6f6acc44 --- /dev/null +++ b/src/DisplayApp/lv_port_disp.cpp @@ -0,0 +1,206 @@ +/** + * @file lv_port_disp_templ.c + * + */ + +/*Copy this file as "lv_port_disp.c" and set this value to "1" to enable content*/ +#if 1 + +/********************* + * INCLUDES + *********************/ +#include <FreeRTOS.h> +#include <projdefs.h> +#include <task.h> +#include "lv_port_disp.h" +#include "../drivers/St7789.h" +/********************* + * DEFINES + *********************/ + +/********************** + * TYPEDEFS + **********************/ + +/********************** + * STATIC PROTOTYPES + **********************/ +static void disp_init(void); + +static void disp_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t * color_p); +#if LV_USE_GPU +static void gpu_blend(lv_color_t * dest, const lv_color_t * src, uint32_t length, lv_opa_t opa); +static void gpu_fill(lv_color_t * dest, uint32_t length, lv_color_t color); +#endif + +/********************** + * STATIC VARIABLES + **********************/ + +/********************** + * MACROS + **********************/ + +/********************** + * GLOBAL FUNCTIONS + **********************/ + +void lv_port_disp_init(void) +{ + /*------------------------- + * Initialize your display + * -----------------------*/ + disp_init(); + + /*----------------------------- + * Create a buffer for drawing + *----------------------------*/ + + /* LittlevGL requires a buffer where it draws the objects. The buffer's has to be greater than 1 display row + * + * There are three buffering configurations: + * 1. Create ONE buffer with some rows: + * LittlevGL will draw the display's content here and writes it to your display + * + * 2. Create TWO buffer with some rows: + * LittlevGL will draw the display's content to a buffer and writes it your display. + * You should use DMA to write the buffer's content to the display. + * It will enable LittlevGL to draw the next part of the screen to the other buffer while + * the data is being sent form the first buffer. It makes rendering and flushing parallel. + * + * 3. Create TWO screen-sized buffer: + * Similar to 2) but the buffer have to be screen sized. When LittlevGL is ready it will give the + * whole frame to display. This way you only need to change the frame buffer's address instead of + * copying the pixels. + * */ + + /* Example for 1) */ +#if 0 + static lv_disp_buf_t disp_buf_1; + static lv_color_t buf1_1[LV_HOR_RES_MAX * 10]; /*A buffer for 10 rows*/ + lv_disp_buf_init(&disp_buf_1, buf1_1, NULL, LV_HOR_RES_MAX * 10); /*Initialize the display buffer*/ +#endif + /* Example for 2) */ + static lv_disp_buf_t disp_buf_2; + static lv_color_t buf2_1[LV_HOR_RES_MAX * 2]; /*A buffer for 10 rows*/ + static lv_color_t buf2_2[LV_HOR_RES_MAX * 2]; /*An other buffer for 10 rows*/ + lv_disp_buf_init(&disp_buf_2, buf2_1, buf2_2, LV_HOR_RES_MAX * 2); /*Initialize the display buffer*/ + + /* Example for 3) */ +#if 0 + static lv_disp_buf_t disp_buf_3; + static lv_color_t buf3_1[LV_HOR_RES_MAX * LV_VER_RES_MAX]; /*A screen sized buffer*/ + static lv_color_t buf3_2[LV_HOR_RES_MAX * LV_VER_RES_MAX]; /*An other screen sized buffer*/ + lv_disp_buf_init(&disp_buf_3, buf3_1, buf3_2, LV_HOR_RES_MAX * LV_VER_RES_MAX); /*Initialize the display buffer*/ +#endif + + /*----------------------------------- + * Register the display in LittlevGL + *----------------------------------*/ + + lv_disp_drv_t disp_drv; /*Descriptor of a display driver*/ + lv_disp_drv_init(&disp_drv); /*Basic initialization*/ + + /*Set up the functions to access to your display*/ + + /*Set the resolution of the display*/ + disp_drv.hor_res = 240; + disp_drv.ver_res = 240; + + /*Used to copy the buffer's content to the display*/ + disp_drv.flush_cb = disp_flush; + /*Set a display buffer*/ + disp_drv.buffer = &disp_buf_2; + +#if LV_USE_GPU + /*Optionally add functions to access the GPU. (Only in buffered mode, LV_VDB_SIZE != 0)*/ + + /*Blend two color array using opacity*/ + disp_drv.gpu_blend = gpu_blend; + + /*Fill a memory array with a color*/ + disp_drv.gpu_fill = gpu_fill; +#endif + + /*Finally register the driver*/ + lv_disp_drv_register(&disp_drv); +} + +/********************** + * STATIC FUNCTIONS + **********************/ + +/* Initialize your display and the required peripherals. */ +extern Pinetime::Drivers::St7789* ptrLcd; +static void disp_init(void) +{ + /*You code here*/ +} + +void NotifyEndOfTransfert(TaskHandle_t task) { + if(task != nullptr) { + BaseType_t xHigherPriorityTaskWoken = pdFALSE; + vTaskNotifyGiveFromISR(task, &xHigherPriorityTaskWoken); + portYIELD_FROM_ISR(xHigherPriorityTaskWoken); + } +} + +/* Flush the content of the internal buffer the specific area on the display + * You can use DMA or any hardware acceleration to do this operation in the background but + * 'lv_disp_flush_ready()' has to be called when finished. */ +static void disp_flush(lv_disp_drv_t * disp_drv, const lv_area_t * area, lv_color_t * color_p) +{ + /*The most simple case (but also the slowest) to put all pixels to the screen one-by-one*/ + auto x = area->x1; + auto y = area->y1; + auto width = (area->x2-area->x1)+1; + auto height = (area->y2-area->y1)+1; + ptrLcd->BeginDrawBuffer(x, y, width, height); + ptrLcd->NextDrawBuffer(reinterpret_cast<const uint8_t *>(color_p), width * height*2) ; + + ulTaskNotifyTake(pdTRUE, 500); + + /* IMPORTANT!!! + * Inform the graphics library that you are ready with the flushing*/ + lv_disp_flush_ready(disp_drv); +} + + +/*OPTIONAL: GPU INTERFACE*/ +#if LV_USE_GPU + +/* If your MCU has hardware accelerator (GPU) then you can use it to blend to memories using opacity + * It can be used only in buffered mode (LV_VDB_SIZE != 0 in lv_conf.h)*/ +static void gpu_blend(lv_disp_drv_t * disp_drv, lv_color_t * dest, const lv_color_t * src, uint32_t length, lv_opa_t opa) +{ + /*It's an example code which should be done by your GPU*/ + uint32_t i; + for(i = 0; i < length; i++) { + dest[i] = lv_color_mix(dest[i], src[i], opa); + } +} + +/* If your MCU has hardware accelerator (GPU) then you can use it to fill a memory with a color + * It can be used only in buffered mode (LV_VDB_SIZE != 0 in lv_conf.h)*/ +static void gpu_fill_cb(lv_disp_drv_t * disp_drv, lv_color_t * dest_buf, lv_coord_t dest_width, + const lv_area_t * fill_area, lv_color_t color); +{ + /*It's an example code which should be done by your GPU*/ + uint32_t x, y; + dest_buf += dest_width * fill_area->y1; /*Go to the first line*/ + + for(y = fill_area->y1; y < fill_area->y2; y++) { + for(x = fill_area->x1; x < fill_area->x2; x++) { + dest_buf[x] = color; + } + dest_buf+=dest_width; /*Go to the next line*/ + } +} + +#endif /*LV_USE_GPU*/ + +#else /* Enable this file at the top */ + +/* This dummy typedef exists purely to silence -Wpedantic. */ +typedef int keep_pedantic_happy; +#endif |