Test draw pixel, draw line.

main.c

@@ -89,6 +89,11 @@ int main(void) {
    * LCD
    */
   ST7735_Init();
+  // draw tests
+  ST7735_FillScreen(Black);
+  ST7735_DrawPixel(10, 10, Silver);
+  ST7735_FillRectangle(5, 63, 150, 1);
+  ST7735_FillRectangle(159, 5, 1, 117);
 
   /*
    * Normal main() thread activity.