| Create a single ARM Cortex-M4 assembly source code file containing the three functions whose function prototypes are given below. These functions are called by a main program that uses them to display three fractal images on the display and the fractal title in white text just below the image. main program: #include #include #include #include "library.h" #include "graphics.h" // Functions to be implemented in assembly ... extern uint8_t * BitmapAddress(char ascii, uint8_t *fontTable, int charHeight, int charWidth) ; extern uint32_t GetBitmapRow(uint8_t *prow) ; extern uint32_t * PixelAddress(int x, int y) ; typedef struct { const uint8_t *table ; const uint16_t Width ; const uint16_t Height ; } sFONT; extern sFONT Font8 ; extern sFONT Font12 ; extern sFONT Font16 ; extern sFONT Font20 ; extern sFONT Font24 ; #define X_MIN 0 #define Y_MIN 40 #define WIDTH XPIXELS #define HEIGHT (YPIXELS-Y_MIN-15) static void BarnsleyFernFractal(void) ; static void MandelbrotSetFractal(void) ; static void JuliaSetFractal(void) ; static uint32_t HSV2RGB(float hue, float sat, float val) ; static uint32_t PackRGB(int red, int grn, int blu) ; static void PutChar(int x, int y, char c, sFONT *font) ; static void PutString(int x, int y, char *str, sFONT *font) ; static void BackgroundColor(uint32_t color) ; static void ForegroundColor(uint32_t color) ; static void FractalTitle(char *title) ; static int SanityChecksOK(void) ; #define ITEMS(a) (sizeof(a)/sizeof(a[0])) #define OPAQUE 0xFF000000 static uint32_t foregroundColor = COLOR_BLACK ; static uint32_t backgroundColor = COLOR_WHITE ; int main() { static void (*fractals[])(void) = { BarnsleyFernFractal, MandelbrotSetFractal, JuliaSetFractal } ; InitializeHardware(HEADER, "Lab 4b: Pixels, Fonts & Fractals") ; if (!SanityChecksOK()) exit(255) ; for (int fractal = 0;; fractal = (fractal + 1) % ITEMS(fractals)) { (*fractals[fractal])() ; WaitForPushButton() ; } } static void BarnsleyFernFractal(void) { const int LIMIT = 50000 ; const float X_ZOOM = 5.5 ; const float Y_ZOOM = 10.5 ; float x = 0 ; float y = 0 ; SetColor(COLOR_RED) ; FillRect(X_MIN, Y_MIN, WIDTH, HEIGHT) ; for (int i = 0; i 4.0) break ; zy = py + 2.0*zx*zy ; zx = px + zxSquared - zySquared ; } hue = (359.0 * iter) / limit ; rgb = HSV2RGB(hue, 1.0, (iter 4) break ; zx = pX + 2.0*zx*zy ; zy = pY + zySquared - zxSquared ; } hue = (359.0 * iter) / limit ; rgb = HSV2RGB(hue, 1.0, (iter table, font->Height, font->Width) ; for (int row = 0; row Height; row++) { uint32_t bits = GetBitmapRow(pline) ; for (int col = 0; col Width; col++) { uint32_t pixel = ((int32_t) bits Width + 7) / 8 ; } } static void PutString(int x, int y, char *str, sFONT *font) { while (*str != '\0') { PutChar(x, y, *str++, font) ; x += font->Width ; } } static void BackgroundColor(uint32_t color) { backgroundColor = color ; } static void ForegroundColor(uint32_t color) { foregroundColor = color ; } static void FractalTitle(char *title) { sFONT *font = &Font16 ; int width = strlen(title) * font->Width ; int xpos = (XPIXELS - width) / 2 ; int ypos = YPIXELS - 16 - font->Height ; ForegroundColor(COLOR_WHITE) ; BackgroundColor(COLOR_RED) ; PutString(xpos, ypos, title, font) ; } static int SanityChecksOK(void) { extern void BSP_LCD_SetFont(sFONT *) ; sFONT *font = &Font16 ; int ttl, row, col, bugs ; unsigned bits,need ; char text[100] ; void *adrs ; BSP_LCD_SetFont(font); bugs = 0 ; col = 15 ; SetForeground(COLOR_BLACK) ; SetBackground(COLOR_WHITE) ; ttl = 60 ; row = ttl + font->Height + 4 ; adrs = BitmapAddress('H', (uint8_t *) Font8.table, Font8.Height, Font8.Width) ; bits = *(uint32_t *) adrs ; need = 0x487848E8 ; if (bits != need) { DisplayStringAt(col, row, "Character: H") ; row += font->Height ; DisplayStringAt(col, row, " Height: 8") ; row += font->Height ; DisplayStringAt(col, row, " Width: 5") ; row += font->Height ; sprintf(text, " Address: %08X", (unsigned) adrs) ; DisplayStringAt(col, row, text) ; row += font->Height ; sprintf(text, " Contents: %08X", bits) ; DisplayStringAt(col, row, text) ; row += font->Height ; sprintf(text, "Should be: %08X", need) ; DisplayStringAt(col, row, text) ; row += 2*font->Height ; bugs++ ; } adrs = BitmapAddress('/', (uint8_t *) Font24.table, Font24.Height, Font24.Width) ; bits = *(uint32_t *) adrs ; need = 0x00001800 ; if (bits != need) { DisplayStringAt(col, row, "Character: /") ; row += font->Height ; DisplayStringAt(col, row, " Height: 24") ; row += font->Height ; DisplayStringAt(col, row, " Width: 17") ; row += font->Height ; sprintf(text, " Address: %08X", (unsigned) adrs) ; DisplayStringAt(col, row, text) ; row += font->Height ; sprintf(text, " Contents: %08X", bits) ; DisplayStringAt(col, row, text) ; row += font->Height ; sprintf(text, "Should be: %08X", need) ; DisplayStringAt(col, row, text) ; row += 2*font->Height ; bugs++ ; } if (bugs > 0) { SetForeground(COLOR_WHITE) ; SetBackground(COLOR_RED) ; DisplayStringAt(col, ttl, "BitmapAddress Bugs:") ; ttl = row + font->Height ; row = ttl + font->Height + 4 ; } SetForeground(COLOR_BLACK) ; SetBackground(COLOR_WHITE) ; adrs = PixelAddress(0, 0) ; need = 0xD0000000 ; if (bugs Height ; DisplayStringAt(col, row, " y (row): 0") ; row += font->Height ; sprintf(text, " Returned: %08X", (unsigned) adrs) ; DisplayStringAt(col, row, text) ; row += font->Height ; sprintf(text, "Should be: %08X", need) ; DisplayStringAt(col, row, text) ; row += 2*font->Height ; bugs++ ; } adrs = PixelAddress(239, 319) ; need = 0xD004AFFC ; if (bugs Height ; DisplayStringAt(col, row, " y (row): 319") ; row += font->Height ; sprintf(text, " Returned: %08X", (unsigned) adrs) ; DisplayStringAt(col, row, text) ; row += font->Height ; sprintf(text, "Should be: %08X", need) ; DisplayStringAt(col, row, text) ; row += 2*font->Height ; bugs++ ; } if (bugs  |
