DICE tests

baremetal/Makefile

@@ -9,7 +9,7 @@ MCU_DEFINE := __SAMD51J19A__
 
 # Flags
 LFLAGS += -mthumb -mabi=aapcs-linux -mlong-calls -mcpu=cortex-m4 -mfloat-abi=softfp -mfpu=fpv4-sp-d16 -DSAMD51
-CFLAGS += -x c -DDEBUG -Os -ffunction-sections -g3 -Wall -c -std=gnu99 $(LFLAGS)
+CFLAGS += -x c -DDEBUG -ffunction-sections -g3 -Wall -c -std=gnu99 $(LFLAGS)
 INCLUDES += -I"samd51" -I"samd51/CMSIS/Include" -I"samd51/include" -I"samd51/startup"
 
 # List the subdirectories for creating object files

baremetal/main.c

@@ -3,23 +3,49 @@
 int main (void) {
     int i;
 
-    // red led is 17, green led is 19
+    // red led is A17, green led is A19 (lit when low)
     REG_PORT_DIR0 = (1u << 17) | (1u << 19);
-    // green led
-    //REG_PORT_DIR0 |= (1u<<19);
+    // make sure they start off
+    REG_PORT_OUTSET0 = (1u << 17) | (1u << 19);
 
-    //REG_PORT_OUTCLR0 = (1u << 19);
-    //REG_PORT_OUTSET0 = (1u << 17);
+    // Prepare output signals (A5, A22)
+    REG_PORT_DIR0 |= (1u << 5) | (1u << 22);
+    // make sure they start low
+    REG_PORT_OUTSET0 = (1u << 5) | (1u << 22);
+
+    // Prepare input signals (A8, B13)
+    /*
+    PORT->Group[0].PINCFG[8].bit.INEN = 1;
+    PORT->Group[0].PINCFG[8].bit.PULLEN = 1;
+    PORT->Group[1].PINCFG[13].bit.INEN = 1;
+    PORT->Group[1].PINCFG[13].bit.PULLEN = 1;
+    */
 
     while(1) {
-        REG_PORT_OUTSET0 = (1u << 17);
-        REG_PORT_OUTCLR0 = (1u << 19);
+        // Listeners
+        /*
+        if ((REG_PORT_IN0 & (1u << 8)) || (REG_PORT_IN1 & (1u << 13))) {
+            // Turn on the LED.
+            REG_PORT_OUTCLR0 = (1u << 17) | (1u << 19);
+            // Raise the signal wires.
+            REG_PORT_OUTSET0 = (1u << 5) | (1u << 22);
+        } else {
+            // Turn off the LED.
+            REG_PORT_OUTSET0 = (1u << 17) | (1u << 19);
+            // Lower the signal wires.
+            REG_PORT_OUTCLR0 = (1u << 5) | (1u << 22);
+        }
+        */
+
+        // Director
+        REG_PORT_OUTCLR0 = (1u << 17) | (1u << 19);
+        REG_PORT_OUTSET0 = (1u << 5) | (1u << 22);
         for (i=0; i<1000000; i++) {
             __asm("nop");
         }
 
-        REG_PORT_OUTCLR0 = (1u << 17);
-        REG_PORT_OUTSET0 = (1u << 19);
+        REG_PORT_OUTSET0 = (1u << 17) | (1u << 19);
+        REG_PORT_OUTCLR0 = (1u << 5) | (1u << 22);
         for (i=0; i<1000000; i++) {
             __asm("nop");
         }

baremetal/openocd.cfg

@@ -5,3 +5,4 @@ transport select swd
 # Chip info
 set CHIPNAME at91samd51j18
 source [find target/atsame5x.cfg]   
+reset