GT-511-C31 指紋スキャンモジュールを mbed で動かしてみる

Diff: GT511C3.cpp

Revision:

4:3dd0f98e6f09

Parent:

3:459a4f985a45

Child:

5:d3ebe6d1ed92

--- a/GT511C3.cpp	Fri Jan 03 12:56:03 2014 +0000
+++ b/GT511C3.cpp	Fri Jan 03 14:12:18 2014 +0000
@@ -1,3 +1,32 @@
+/**
+ * @section LICENSE
+ *
+ * Copyright (c) 2013 @tosihisa, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
+ * and associated documentation files (the "Software"), to deal in the Software without restriction, 
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute, 
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is 
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or 
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * @section DESCRIPTION
+ *
+ * Fingerprint reader module "GT-511C3" class.
+ *
+ * http://www.adh-tech.com.tw/?22,gt-511c3-gt-511c31
+ * http://www.adh-tech.com.tw/files/GT-511C3_datasheet_V1%201_20131127[1].pdf
+ * https://www.sparkfun.com/products/11792
+ * https://github.com/sparkfun/Fingerprint_Scanner-TTL/ 
+ */
 
 #include "mbed.h"
 #include "GT511C3.h"
@@ -40,6 +69,7 @@
 
 int GT511C3::RecvResponse(unsigned long *Parameter,unsigned short *Response)
 {
+    const unsigned char fixedbuf[4] = { 0x55,0xAA,0x01,0x00 };
     unsigned char buf[12];
     unsigned short sum = 0;
     int i;
@@ -53,10 +83,11 @@
         if(i < 9){
             sum += buf[i];
         }
-        if((i == 0) && (buf[i] != 0x55))
-            return -1;
-        if((i == 1) && (buf[i] != 0xAA))
-            return -1;
+        if(i < 4){
+            if(buf[i] != fixedbuf[i]){
+                return -1;
+            }
+        }
     }
     if(buf[10] != (sum & 0xff))
         return -2;
@@ -74,12 +105,43 @@
     return 0;
 }
 
+int GT511C3::RecvData(unsigned char *data,unsigned long size)
+{
+    const unsigned char fixedbuf[4] = { 0x5A,0xA5,0x01,0x00 };
+    unsigned short sum = 0;
+    int i;
+
+    for(i = 0;i < size;i++){
+        while(!readable());
+        *(data + i) = getc();
+        if(i < (size-2)){
+            sum += *(data + i);
+        }
+        if(i < 4){
+            if(*(data + i) != fixedbuf[i]){
+                return -1;
+            }
+        }
+    }
+    if(*(data + size - 2) != (sum & 0xff))
+        return -2;
+    if(*(data + size - 1) != ((sum >> 8) & 0xff))
+        return -2;
+    return 0;
+}
+
 int GT511C3::SendRecv(unsigned short Command,unsigned long *Parameter,unsigned short *Response)
 {
     int sts;
-    sts = SendCommand(*Parameter,Command);
-    if(sts == 0){
-        sts = RecvResponse(Parameter,Response);
+    if((sts = SendCommand(*Parameter,Command)) == 0){
+        *Parameter = 0;
+        if((sts = RecvResponse(Parameter,Response)) != 0){
+            *Response = CMD_Nack;
+            *Parameter = NACK_IO_ERR;
+        }
+    }
+    if(*Response == CMD_Nack){
+        LastError = *Parameter;
     }
     return sts;
 }
@@ -92,6 +154,28 @@
     return 0;
 }
 
+int GT511C3::Open(void)
+{
+    unsigned long Parameter = 1;
+    unsigned short Response = 0;
+    unsigned char buf[4+sizeof(FirmwareVersion)+sizeof(IsoAreaMaxSize)+sizeof(DeviceSerialNumber)+2];
+    int sts = 0;
+
+    if((sts = Init()) != 0)
+        return -1;
+
+    sts = SendRecv(CMD_Open,&Parameter,&Response);
+    if((sts != 0) || (Response != CMD_Ack)){
+        return -1;
+    }
+    if((sts = RecvData(buf,sizeof(buf))) == 0){
+        memcpy(&FirmwareVersion,&buf[4+0],sizeof(FirmwareVersion));
+        memcpy(&IsoAreaMaxSize,&buf[4+sizeof(FirmwareVersion)],sizeof(IsoAreaMaxSize));
+        memcpy(DeviceSerialNumber,&buf[4+sizeof(FirmwareVersion)+sizeof(IsoAreaMaxSize)],sizeof(DeviceSerialNumber));
+    }
+    return sts;
+}
+
 int GT511C3::WaitPress(int press)
 {
     while(IsPress() != press);
@@ -105,8 +189,9 @@
     int sts = 0;
 
     sts = SendRecv(CMD_CmosLed,&Parameter,&Response);
-    if((sts != 0) || (Response != CMD_Ack))
+    if((sts != 0) || (Response != CMD_Ack)){
         return -1;
+    }
     return 0;
 }
 
@@ -165,3 +250,4 @@
         return -1;
     return Parameter;
 }
+