minor fix to sprite_demo.c clocking; add some screenshots

README.md

@@ -32,19 +32,19 @@ is useful when you only have 264K of RAM).
 
 For a fuller description of scanout video see [here](https://github.com/raspberrypi/pico-extras/blob/master/src/common/pico_scanvideo/README.adoc)
 
-Name|Description
----|---
-[demo1](scanvideo/demo1)| So named because it was the first demo program written that used video.. it is a bit dated now and hails from a time where there was _much_ less RAM on the RP2040
-[flash_stream](scanvideo/flash_stream)| Streams video data out of flash fast enough to drive 640x480x60fps bitmap display
-[hscroll_dma_tiles](scanvideo/hscroll_dma_tiles)| A horizontal scrolling test app which uses a second video plane (PIO) to overlay sprites
-[mandelbrot](scanvideo/mandelbrot)| A mandelbrot generator using a 320x240x16 framebuffer
-[mario_tiles](scanvideo/mario_tiles)| Confusingly named as a reference to Super Mario Kart's tiled psuedo-3D rendering. This is similar to [hscroll_dma_tiles](scanvideo/hscroll_dma_tiles) except the whole tiled scrolling area is now rotated and zoomed.
-[scanvideo_minimal](scanvideo/scanvideo_minimal)| A very basic video output generator which generates a test pattern
-[render](scanvideo/render)| A very dated rendering library used by [demo1](scanvideo/demo1) - avoid!
-[sprite](scanvideo/sprite)| A small sprite library used by [sprite_demo](scanvideo/scanvideo_minimal)
-[sprite_demo](scanvideo/sprite_demo)| Some bouncing Eben heads
-[test_pattern](scanvideo/test_pattern)| Display color bars
-[textmode](scanvideo/textmode)| Shows off chained DMA to generate scanlines out of glyph fragments via DMA/PIO
+Name|Screenshot|Description
+---|---|---
+[demo1](scanvideo/demo1)|![](scanvideo/demo1/screenshot.jpg)| So named because it was the first demo program written that used video.. it is a bit dated now and hails from a time where there was _much_ less RAM on the RP2040
+[flash_stream](scanvideo/flash_stream)|![](scanvideo/flash_stream/screenshot.jpg)| Streams video data out of flash fast enough to drive 640x480x60fps bitmap display
+[hscroll_dma_tiles](scanvideo/hscroll_dma_tiles)|![](scanvideo/hscroll_dma_tiles/screenshot.jpg)| A horizontal scrolling test app which uses a second video plane (PIO) to overlay sprites
+[mandelbrot](scanvideo/mandelbrot)|![](scanvideo/mandelbrot/screenshot.jpg)| A mandelbrot generator using a 320x240x16 framebuffer
+[mario_tiles](scanvideo/mario_tiles)|![](scanvideo/mario_tiles/screenshot.jpg)| Confusingly named as a reference to Super Mario Kart's tiled psuedo-3D rendering. This is similar to [hscroll_dma_tiles](scanvideo/hscroll_dma_tiles) except the whole tiled scrolling area is now rotated and zoomed.
+[scanvideo_minimal](scanvideo/scanvideo_minimal)|![](scanvideo/scanvideo_minimal/screenshot.jpg)| A very basic video output generator which generates a test pattern
+[render](scanvideo/render)| | A very dated rendering library used by [demo1](scanvideo/demo1) - avoid!
+[sprite](scanvideo/sprite)| | A small sprite library used by [sprite_demo](scanvideo/scanvideo_minimal)
+[sprite_demo](scanvideo/sprite_demo)|![](scanvideo/sprite_demo/screenshot.jpg)| Some bouncing Eben heads
+[test_pattern](scanvideo/test_pattern)|![](scanvideo/test_pattern/screenshot.jpg)| Display color bars
+[textmode](scanvideo/textmode)|![](scanvideo/textmode/screenshot.jpg)| Shows off chained DMA to generate scanlines out of glyph fragments via DMA/PIO
 
 
 ## Sleep

scanvideo/sprite_demo/sprite_demo.c

@@ -174,12 +174,13 @@ int main(void) {
 #ifdef TURBO_BOOST
     hw_set_bits(&mm_vreg_and_chip_reset->vreg, VREG_AND_CHIP_RESET_VREG_VSEL_BITS);
     sleep_ms(10);
-    set_sys_clock(1536*MHZ, 4, 1);
+    set_sys_clock_khz(400000, true);
 #else
 #if PICO_SCANVIDEO_48MHz
     set_sys_clock_khz(192000, true);
-#endif
+#else
     set_sys_clock_khz(200000, true);
+#endif
 #endif
     // Re init uart now that clk_peri has changed
     setup_default_uart();