Add clock_get_time for coco (Only supports SIMPLE_BINARY format)

coco/src/fn_clock/clock_get_time.c

@@ -0,0 +1,56 @@
+#include <cmoc.h>
+#include <coco.h>
+#include "fujinet-fuji.h"
+#include "fujinet-clock.h"
+#include "fujinet-network.h"
+#include <dw.h>
+#include <fujinet-fuji-coco.h>
+
+static byte timebuf[6];
+
+uint8_t clock_get_time(uint8_t* time_data, TimeFormat format)
+{
+    uint8_t result = FN_ERR_OK;
+
+    byte cmd = 0x23; // DriveWire command to get time
+    int year;
+
+    if (format == SIMPLE_BINARY)
+    {
+        memset(&timebuf, 0, sizeof(timebuf));
+
+        bus_ready();
+        dwwrite((byte *)&cmd, 1);
+
+        if(dwread(timebuf, 6))
+        {
+            // SIMPLE_BINARY: 7 bytes: [Y(century, e.g. 20), Y(hundreds, e.g. 24), M(1-12), D(1-31), H(0-23), M(0-59), S(0-59)]
+            //                         Uses the current FN Timezone
+
+            // timebuf[0]  + 1900 = year (e.g. 2024)
+            year = (int )timebuf[0] + 1900u;
+            time_data[0] = (uint8_t)(year / 100u);
+            time_data[1] = (uint8_t)(year % 100u);
+            time_data[2] = timebuf[1]; // Month (1-12)
+            time_data[3] = timebuf[2]; // Day (1-31)
+            time_data[4] = timebuf[3]; // Hour (0-23)
+            time_data[5] = timebuf[4]; // Minute (0-59)
+            time_data[6] = timebuf[5]; // Second (0-59)
+
+            result = FN_ERR_OK;
+        }
+        else
+        {
+            result = FN_ERR_UNKNOWN;    
+        }
+    }
+    else
+    {
+        // Only the simple binary format is supported for now, so return an error for other formats
+        result = FN_ERR_BAD_CMD;
+    }   
+
+    return result;
+}
+
+