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小弟我最近剛碰了一塊新的嵌入式開發板(STM32F4)

板子上有一塊LCD的面板
我想在他上面顯示一些圖形或是直線

我有使用一些函數
LCD_DrawRect(uint16_t Xpos, uint16_t Ypos, uint8_t Height, uint16_t Width);
變更為
LCD_DrawRect(10,100,40,80);

LCD_DrawLine(uint16_t Xpos, uint16_t Ypos, uint16_t Length, uint8_t Direction);
一樣變更為
LCD_DrawLine(100,100, 50,LCD_DIR_HORIZONTAL);

(怎麼幫line改顏色呢?)

但是我編譯完畢燒入進去板子上 卻沒有出現任何的圖形??
拜託各位大大幫解
謝謝~~

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