Bugfix WPC-95

Image was shifted by one pixel on WPC95 (tested with AFM). The frame detection
now waits for one more pixel.
This change has not been tested on other WPC systems. Therefore, it might break the interface
on older WPC systems

Author: hifiberry

src/dmd_interface_wpc.pio

@@ -49,6 +49,10 @@ lineloop:
     wait 0 gpio rclk
     jmp x-- lineloop
 
+    ; delay by 1 pixel
+    wait 0 gpio 4
+    wait 1 gpio 4
+
     irq 4
 
 .wrap
@@ -109,4 +113,4 @@ static inline void dmd_framedetect_wpc_program_init(PIO pio, uint sm, uint offse
     // Load our configuration, do not yet start the program
     pio_sm_init(pio, sm, offset, &c);
 }
-%}
+%}