depth r8, 32-wide in vex

Author: vk2seb

deps/litex

@@ -52,7 +52,8 @@ riscv::plic_context!(PLIC0, 0xf0c00000, 0, VexInterrupt, VexPriority);
 
 const FB_SIZE_X: usize = 720;
 const FB_SIZE_Y: usize = 720;
-static mut FB: Aligned<A4, [u32; FB_SIZE_X*FB_SIZE_Y]> = Aligned([0u32; FB_SIZE_X*FB_SIZE_Y]);
+const FB_XOFFS: usize = 80;
+static mut FB: Aligned<A4, [u32; FB_SIZE_X*FB_SIZE_Y/4]> = Aligned([0u32; FB_SIZE_X*FB_SIZE_Y/4]);
 
 // Create the HAL bindings for the remaining LiteX peripherals.
 
@@ -97,7 +98,7 @@ unsafe fn irq_handler() {
 
                 let ix = ((ch0raw as i32 * (FB_SIZE_X) as i32) >> 16) as usize;
                 let iy = ((ch1raw as i32 * (FB_SIZE_Y) as i32) >> 16) as usize;
-                FB[(FB_SIZE_Y*(iy+FB_SIZE_Y/2)) + (ix+FB_SIZE_X/4)] = 0xFF;
+                FB[((FB_SIZE_Y*(iy+FB_SIZE_Y/2)) + (ix+FB_SIZE_X/2-FB_XOFFS))/4] = 0xFF << (ix % 4)*8;
             }
 
             peripherals.EURORACK_PMOD0.ev_pending().write(|w| w.bits(pending_subtype));
@@ -161,13 +162,12 @@ fn main() -> ! {
             }
             */
 
-            /*
-            for p in 0..(FB_SIZE_X*FB_SIZE_Y) {
-                    FB[p] = 0;//(FB[p] >> 1);
+            for p in 0..(FB_SIZE_X*FB_SIZE_Y/4) {
+                FB[p] = (FB[p] >> 1) & 0x7f7f7f7f;
             }
-            */
+
+            timer.delay_ms(50u32);
         }
 
-        timer.delay_ms(500u32);
     }
 }