picorv32 image acquisition

Signed-off-by: David Shah <davey1576@gmail.com>

demo/camera/camera.c

@@ -19,7 +19,7 @@
 #define CAMERA_BASE 0x03000000
 
 #define reg_camera_i2c (*(volatile uint32_t*)CAMERA_BASE)
-#define reg_camera_fb  ((volatile uint32_t*)(CAMERA_BASE + 0x8000))
+#define reg_camera_fb  ((volatile uint8_t*)(CAMERA_BASE + 0x8000))
 
 static void i2c_delay() {
     for (volatile int i = 0; i < 10; i++)

demo/camera/phy/byte_aligner.v

@@ -94,7 +94,7 @@ module dphy_rx_byte_align(
 		found_sync = 1'b0;
 		sync_offs = 0;
 		for (i = 0; i < 8; i = i + 1) begin
-			if ((concat_word[(1+i) +: 8] == sync_word) /*&& (last_byte[i:0]  == 0)*/) begin
+			if ((concat_word[(1+i) +: 8] == sync_word) && (last_byte[i:0]  == 0)) begin
 				was_found = 1'b1;
 				offset = i;
 			end

demo/firmware.c

@@ -30,6 +30,8 @@ extern uint32_t sram;
 #define RUN_LOOP          0
 #define SER_TIMEOUT 1500000
 #define ML_TIMEOUT      100
+#define NUM_IMAGES       10
+#define IMAGE_NOPS    10000
 
 #define reg_leds  (*(volatile uint32_t*)0x02000000)
 #define reg_uart  (*(volatile uint32_t*)0x02000004)
@@ -411,11 +413,37 @@ void ml_test()
 
 // --------------------------------------------------------
 
+void print_image() {
+    uint8_t buf[30*40];
+    print("Acquiring image\n");
+    acquire_image(buf);
+    print("----------------------------------------\n");
+
+    int addr = 0;
+    for (int y = 0; y < 30; y++) {
+        for (int x = 0; x < 40; x++) {
+           print_hex(buf[addr++], 2);
+           print(" ");
+        }
+        print("\n");
+    }
+}
+
+// --------------------------------------------------------
+
 void main()
 {
 	print("\n\n\n\n\n");
 	print("Booting..\n");
 
+        camera_init();
+        print ("Initialised camera\n");
+	for (int ii=0; ii< NUM_IMAGES; ++ii) {
+		print_image();
+		for (volatile int i = 0; i < IMAGE_NOPS; i++)
+			;
+	}
+
 	ml_test();
 	print("\n");
 	camera_init();