AXI Schreiben

Software/axi_crc_dma.h

@@ -0,0 +1,32 @@
+#pragma once
+
+// -------------------------------------------------------------------------------------------------
+//  Control Register:
+//   0      : Run
+//   1      : Interrupt Enable
+//   31..2  : Reserved
+// -------------------------------------------------------------------------------------------------
+//  Interrupt Status Register:
+//   0      :
+//   31..1  :
+// -------------------------------------------------------------------------------------------------
+//  Read Address Register:
+//   31..0  : First address of data packets
+// -------------------------------------------------------------------------------------------------
+//  Write Address Register:
+//   31..0  : Address to write packets + checksum to
+// -------------------------------------------------------------------------------------------------
+//  Packet Size Register:
+//   15.. 0 : Packets Size in words minus 1
+//   31..16 : Reserved
+// -------------------------------------------------------------------------------------------------
+//  Number Packets Register:
+//   15.. 0 : Number of packets minus 1
+//   31..16 : Reserved
+// -------------------------------------------------------------------------------------------------
+//  Polynomail Register:
+//   31..0  : Polynomial
+// -------------------------------------------------------------------------------------------------
+//  Intial Value Register:
+//   31..0  : Initial Value
+// -------------------------------------------------------------------------------------------------

Software/axi_crc_dma_bare_metal.c

@@ -0,0 +1,33 @@
+#include <stdint.h>
+
+int main()
+{
+    volatile uint32_t* base = (uint32_t*) 0x43c00000;
+
+    // Schreib- und Leseadresse setzen
+    base[2] = 0x20000000;
+    base[3] = 0x30000000;
+
+    // Packetgroesse stzen
+    base[4] = 20;
+    base[5] = 5;
+
+    // Generatorpolynom und Initialwert setzen
+    base[6] = 0x04C11DB7;
+    base[7] = 00000000;
+
+    // Interrupt aktivieren und starten
+    base[0] = base[0] | 0x00000002;
+
+    while (1) {
+    	// Interrupt status abfragen
+		if ((base[1] & 0x1) == 0x1) {
+
+			//Interrupt zuruecksetzen
+			base[1] &= ~(1<<0);
+			base[0] |= (1<<0);
+		}
+    }
+
+    return 0;
+}