lcd speed optimization

27.24 ms to write a frame! also skip every other frame for much
smoother playback (30FPS)

Author: me-no-dev

components/nofrendo-esp32/spi_lcd.c

@@ -283,21 +283,22 @@ static void spi_master_init()
     }
 }
 
+#define U16x2toU32(m,l) ((((uint32_t)(l>>8|(l&0xFF)<<8))<<16)|(m>>8|(m&0xFF)<<8))
+
 void ili9341_send_data(int x, int y, int width, int height, const uint16_t *data) {
-#define U16x2toU32(a,b) ((((uint32_t)(b>>8|(b&0xFF)<<8))<<16)|(a>>8|(a&0xFF)<<8))
     int i, l;
     uint16_t x1, y1;
     uint32_t xv, yv, dc, bv;
-    x1 = x+(width-1);
-    xv = U16x2toU32(x,x1);
-    y1 = y+(height-1);
-    yv = U16x2toU32(y,y1);
     l = height*width;
-    dc = (1 << PIN_NUM_DC);
+    x1 = x+(width-1);//287
+    y1 = y+(height-1);//y
+    xv = U16x2toU32(x,x1);//32,287
+    yv = U16x2toU32(y,y1);//y,y
 
     // x = 32, y = 8 - 231, width = 256, height = 1
-    //ets_printf("%u.%u %ux%u\n", x, y, width, height);
-    
+    //ets_printf("%08X\n", xv);
+
+    dc = (1 << PIN_NUM_DC);
     GPIO.out_w1tc = dc;
     SET_PERI_REG_BITS(SPI_MOSI_DLEN_REG(SPI_NUM), SPI_USR_MOSI_DBITLEN, 7, SPI_USR_MOSI_DBITLEN_S);
     WRITE_PERI_REG((SPI_W0_REG(SPI_NUM)), 0x2A);
@@ -340,6 +341,69 @@ void ili9341_send_data(int x, int y, int width, int height, const uint16_t *data
     }
 }
 
+extern uint16_t myPalette[];
+
+void ili9341_write_frame(const uint16_t xs, const uint16_t ys, const uint16_t width, const uint16_t height, const uint8_t * data[]){
+    int x, y;
+    int i;
+    uint16_t x1, y1;
+    uint32_t xv, yv, dc, bv;
+    uint32_t temp[16];
+    dc = (1 << PIN_NUM_DC);
+    
+    for (y=0; y<height; y++) {
+        //start line
+        x1 = xs+(width-1);
+        y1 = ys+y+(height-1);
+        xv = U16x2toU32(xs,x1);
+        yv = U16x2toU32((ys+y),y1);
+        
+        while (READ_PERI_REG(SPI_CMD_REG(SPI_NUM))&SPI_USR);
+        GPIO.out_w1tc = dc;
+        SET_PERI_REG_BITS(SPI_MOSI_DLEN_REG(SPI_NUM), SPI_USR_MOSI_DBITLEN, 7, SPI_USR_MOSI_DBITLEN_S);
+        WRITE_PERI_REG((SPI_W0_REG(SPI_NUM)), 0x2A);
+        SET_PERI_REG_MASK(SPI_CMD_REG(SPI_NUM), SPI_USR);
+        while (READ_PERI_REG(SPI_CMD_REG(SPI_NUM))&SPI_USR);
+        GPIO.out_w1ts = dc;
+        SET_PERI_REG_BITS(SPI_MOSI_DLEN_REG(SPI_NUM), SPI_USR_MOSI_DBITLEN, 31, SPI_USR_MOSI_DBITLEN_S);
+        WRITE_PERI_REG((SPI_W0_REG(SPI_NUM)), xv);
+        SET_PERI_REG_MASK(SPI_CMD_REG(SPI_NUM), SPI_USR);
+        while (READ_PERI_REG(SPI_CMD_REG(SPI_NUM))&SPI_USR);
+        GPIO.out_w1tc = dc;
+        SET_PERI_REG_BITS(SPI_MOSI_DLEN_REG(SPI_NUM), SPI_USR_MOSI_DBITLEN, 7, SPI_USR_MOSI_DBITLEN_S);
+        WRITE_PERI_REG((SPI_W0_REG(SPI_NUM)), 0x2B);
+        SET_PERI_REG_MASK(SPI_CMD_REG(SPI_NUM), SPI_USR);
+        while (READ_PERI_REG(SPI_CMD_REG(SPI_NUM))&SPI_USR);
+        GPIO.out_w1ts = dc;
+        SET_PERI_REG_BITS(SPI_MOSI_DLEN_REG(SPI_NUM), SPI_USR_MOSI_DBITLEN, 31, SPI_USR_MOSI_DBITLEN_S);
+        WRITE_PERI_REG((SPI_W0_REG(SPI_NUM)), yv);
+        SET_PERI_REG_MASK(SPI_CMD_REG(SPI_NUM), SPI_USR);
+        while (READ_PERI_REG(SPI_CMD_REG(SPI_NUM))&SPI_USR);
+        GPIO.out_w1tc = dc;
+        SET_PERI_REG_BITS(SPI_MOSI_DLEN_REG(SPI_NUM), SPI_USR_MOSI_DBITLEN, 7, SPI_USR_MOSI_DBITLEN_S);
+        WRITE_PERI_REG((SPI_W0_REG(SPI_NUM)), 0x2C);
+        SET_PERI_REG_MASK(SPI_CMD_REG(SPI_NUM), SPI_USR);
+        while (READ_PERI_REG(SPI_CMD_REG(SPI_NUM))&SPI_USR);
+        
+        x = 0;
+        GPIO.out_w1ts = dc;
+        SET_PERI_REG_BITS(SPI_MOSI_DLEN_REG(SPI_NUM), SPI_USR_MOSI_DBITLEN, 511, SPI_USR_MOSI_DBITLEN_S);
+        while (x<width) {
+            for (i=0; i<16; i++) {
+                x1 = myPalette[(unsigned char)(data[y][x])]; x++;
+                y1 = myPalette[(unsigned char)(data[y][x])]; x++;
+                temp[i] = U16x2toU32(x1,y1);
+            }
+            while (READ_PERI_REG(SPI_CMD_REG(SPI_NUM))&SPI_USR);
+            for (i=0; i<16; i++) {
+                WRITE_PERI_REG((SPI_W0_REG(SPI_NUM) + (i << 2)), temp[i]);
+            }
+            SET_PERI_REG_MASK(SPI_CMD_REG(SPI_NUM), SPI_USR);
+        }
+    }
+    while (READ_PERI_REG(SPI_CMD_REG(SPI_NUM))&SPI_USR);
+}
+
 void ili9341_init()
 {
     spi_master_init();

components/nofrendo-esp32/spi_lcd.h

@@ -26,6 +26,7 @@ extern "C"
 {
 #endif
 
+void ili9341_write_frame(const uint16_t x, const uint16_t y, const uint16_t width, const uint16_t height, const uint8_t *data[]);
 void ili9341_send_data(int x, int y, int width, int height, const uint16_t *data);
 void ili9341_init();
 

components/nofrendo-esp32/video_audio.c

@@ -220,14 +220,12 @@ static void custom_blit(bitmap_t *bmp, int num_dirties, rect_t *dirty_rects) {
 static void videoTask(void *arg) {
 	int x, y;
 	bitmap_t *bmp=NULL;
-	while(1) {
+	x = (320-DEFAULT_WIDTH)/2;
+    y = ((240-DEFAULT_HEIGHT)/2);
+    while(1) {
+		xQueueReceive(vidQueue, &bmp, portMAX_DELAY);//skip one frame to drop to 30
 		xQueueReceive(vidQueue, &bmp, portMAX_DELAY);
-		for (y=0; y<DEFAULT_HEIGHT; y++) {
-			for (x=0; x<DEFAULT_WIDTH; x++) {
-				line[x]=myPalette[(unsigned char)bmp->line[y][x]];
-			}
-			ili9341_send_data((320-DEFAULT_WIDTH)/2, y+((240-DEFAULT_HEIGHT)/2), DEFAULT_WIDTH, 1, line);
-		}
+		ili9341_write_frame(x, y, DEFAULT_WIDTH, DEFAULT_HEIGHT, (const uint8_t **)bmp->line);
 	}
 }