??

examples/dsi_debug.rs

@@ -10,8 +10,15 @@ use stm32f4;
 use stm32f4::stm32f413::GPIOA;
 //use stm32f411::{GPIOA, RCC};
 
-//const bit_string: u16 = 0x0FFF;
-const bit_string: u16 = 0xF000;
+//const bit_string: u16 = 0x0;
+//const bit_string: u16 = 0xFFFF;
+const bit_string: u16 = 0x0FFF;
+//actual string 0b1_01111101_1111
+//const bit_s: u32 = 0b10_0110101010100110_10101010; // Start stop high 26 bits (start pos 25)
+//const bit_s: u32 = 0b01_0110101010100110_01010101; // Start stop low
+const bit_s: u32 = 0b10_0101010101010101_10101010;
+
+//const bit_string: u16 = 0xF000;
 /*(
 0x0FFF full
 0 11111111 1111
@@ -55,8 +62,9 @@ const APP: () = {
         // configure PA5 as output
         let gpioa = cx.device.GPIOA;
         gpioa.moder.modify(|_, w| unsafe { w.moder5().bits(1) });
+        gpioa.moder.modify(|_, w| unsafe { w.moder6().bits(1) });
         
-        let mut point: u16 = 0x0;
+        let mut point: u16 = 25;
 
         init::LateResources {
             dwt: cx.core.DWT,
@@ -81,16 +89,35 @@ const APP: () = {
 
     #[task(binds = SysTick, resources = [ON, point],)]
     fn syst(cx: syst::Context) {
+
+        let r = cx.resources;
+        if *r.point != 0 {
+            let m = bit_s >> *r.point & 0x1;
+            unsafe {
+                if m == 1 {
+                    (*GPIOA::ptr()).odr.modify(|_, w| w.odr5().bit(true));
+                } else {
+                    (*GPIOA::ptr()).odr.modify(|_, w| w.odr5().bit(false));
+                }
+            }
+            *r.point = *r.point - 1;
+        } else {
+            unsafe {
+                (*GPIOA::ptr()).odr.modify(|_, w| w.odr5().bit(false));
+            }
+        }
+        /*
         let r = cx.resources;
         *r.ON = !*r.ON;
         if *r.ON == true {
-            if *r.point == 15 {
-                *r.point = 0;
+            if *r.point == 2 {
+
             } else {
-                *r.point = *r.point + 1;
+                *r.point = *r.point - 1;
             }
         }
-        let bit: u16 = (bit_string & (0x8000 >> *r.point)) >> (15 - *r.point);
+        let bit: u16 = (bit_string >> *r.point) & 0x1;
+        //let bit: u16 = (bit_string & (0x8000 >> *r.point)) >> (15 - *r.point);
         let t: u16 = bit ^ (*r.ON as u16);
         let mut wr: bool;
         if t == 1 {
@@ -100,11 +127,18 @@ const APP: () = {
         } else {
             panic!();
         }
-        wr = *r.ON;
+        if *r.point == 2 {
+            unsafe {
+                (*GPIOA::ptr()).odr.modify(|_, w| w.odr6().bit(false)); // output clock on PA6
+                (*GPIOA::ptr()).odr.modify(|_, w| w.odr5().bit(false));
+            }
+        } else {
             unsafe {
                 (*GPIOA::ptr()).odr.modify(|_, w| w.odr5().bit(wr));
+                (*GPIOA::ptr()).odr.modify(|_, w| w.odr6().bit(*r.ON)); // output clock on PA6
             }
-
+        }
+        */
         //rprintln!(*r.point);
         //rprintln!("SysTick");
         //asm::bkpt();