UG_DriverRegister()

Функция регистрирует драйвер 2D акселерации

Прототип:

#include <ugui.h>
 
void UG_DriverRegister( UG_U8 type, void *driver );

Аргументы:

type

Тип драйвера

driver

Указатель на функцию драйвера

Библиотека:

ugui

Пример использования:

/* Hardware accelerator for UG_DrawLine( Platform: STM32F4x9 ) */
UG_RESULT _HW_DrawLine( void *ctx, UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_COLOR c )
{
    DMA2D_InitTypeDef   DMA2D_InitStruct;
    RCC_AHB1PeriphResetCmd( RCC_AHB1Periph_DMA2D, ENABLE );
    RCC_AHB1PeriphResetCmd( RCC_AHB1Periph_DMA2D, DISABLE );
    DMA2D_InitStruct.DMA2D_Mode  = DMA2D_R2M;
    DMA2D_InitStruct.DMA2D_CMode = DMA2D_RGB565;
    /* Convert UG_COLOR to RGB565 */
    DMA2D_InitStruct.DMA2D_OutputBlue  = (c >> 3)  & 0x1F;
    DMA2D_InitStruct.DMA2D_OutputGreen = (c >> 10) & 0x3F;
    DMA2D_InitStruct.DMA2D_OutputRed   = (c >> 19) & 0x1F;
    DMA2D_InitStruct.DMA2D_OutputAlpha = 0x0F;
 
    /* Horizontal line */
    if ( y1 == y2 )
    {
        DMA2D_InitStruct.DMA2D_OutputOffset = 0;
        DMA2D_InitStruct.DMA2D_NumberOfLine = 1;
        DMA2D_InitStruct.DMA2D_PixelPerLine = x2 - x1 + 1;
    }
    /* Vertical line */
    else if ( x1 == x2 )
    {
        DMA2D_InitStruct.DMA2D_OutputOffset = LCD PIXEL WIDTH
        DMA2D_InitStruct.DMA2D_NumberOfLine = y2 - y1 + 1;
        DMA2D_InitStruct.DMA2D_PixelPerLine = 1;
    } else
        return UG_RESULT_FAIL;
 
    if ( ltdc_work_layer == LAYER_1 )
        DMA2D_InitStruct.DMA2D_OutputMemoryAdd = SDRAM_BANK_ADDR + LAYER_1_OFFSET + 2 * (LCD_PIXEL_WIDTH * y1 + x1);
    else
        DMA2D_InitStruct.DMA2D_OutputMemoryAdd = SDRAM_BANK_ADDR + LAYER_2_OFFSET + 2 * (LCD_PIXEL_WIDTH * y1 + x1);
 
    DMA2D_Init( &DMA2D_InitStruct );
    DMA2D_StartTransfer();
    while ( DMA2D_GetFlagStatus( DMA2D_FLAG_TC ) == RESET ) {};
 
    return UG_RESULT_OK;
}
 
/* Hardware accelerator for UG_FillFrame( Platform : STM32F4x9 ) */
UG_RESULT _HW_FillFrame( void *ctx, UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_COLOR c )
{
    DMA2D_InitTypeDef   DMA2D_InitStruct;
 
    DMA2D_DeInit() ;
    DMA2D_InitStruct.DMA2D_Mode  = DMA2D_R2M;
    DMA2D_InitStruct.DMA2D_CMode = DMA2D_RGB565;
    /* Convert UG_COLOR to RGB565 */
    DMA2D_InitStruct.DMA2D_OutputBlue   = (c >> 3)  & 0x1F;
    DMA2D_InitStruct.DMA2D_OutputGreen  = (c >> 10) & 0x3F;
    DMA2D_InitStruct.DMA2D_OutputRed    = (c >> 19) & 0x1F;
    DMA2D_InitStruct.DMA2D_OutputAlpha  = 0x0F;
    DMA2D_InitStruct.DMA2D_OutputOffset = (LCD_PIXEL_WIDTH - (x2 - x1 + 1));
    DMA2D_InitStruct.DMA2D_NumberOfLine = y2 - y1 + 1;
    DMA2D_InitStruct.DMA2D_PixelPerLine = x2 - x1 + 1;
 
    if ( ltdc_work_layer == LAYER_1 )
        DMA2D_InitStruct.DMA2D_OutputMemoryAdd = SDRAM_BANK_ADDR + LAYER_1_OFFSET + 2 * (LCD_PIXEL_WIDTH * y1 + x1);
    else
        DMA2D_InitStruct.DMA2D_OutputMemoryAdd = SDRAM_BANK_ADDR + LAYER_2_OFFSET + 2 * (LCD_PIXEL_WIDTH * y1 + x1);
    DMA2D_Init( &DMA2D_InitStruct );
 
    DMA2D_StartTransfer();
    while ( DMA2D_GetFlagStatus( DMA2D_FLAG_TC ) == RESET ) {};
 
    return UG_RESULT_OK;
}
 
int main( void )
{
    // ...
    /* Unleash the performance of the STM32 */
    UG_DriverRegister( DRIVER_DRAW_LINE,  (void *)_HW_DrawLine );
    UG_DriverRegister( DRIVER_FILL_FRAME, (void *)_HW_FillFrame );
    // . . .
}

Предыдущий раздел: Особенности 2D акселерации