From 2db3a766fd94a852d95f46efadf3a0dacccd29f5 Mon Sep 17 00:00:00 2001
From: Uwe Bonnes <bon@elektron.ikp.physik.tu-darmstadt.de>
Date: Fri, 10 Sep 2010 22:54:39 +0200
Subject: [PATCH] Example for the EEPROM API

---
 examples/CMakeLists.txt |    2 +
 examples/eeprom.c       |  176 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 178 insertions(+), 0 deletions(-)
 create mode 100644 examples/eeprom.c

diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index af7f57a..d8be6f5 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -21,6 +21,7 @@ if (EXAMPLES)
     add_executable(serial_read serial_read.c)
     add_executable(baud_test baud_test.c)
     add_executable(stream_test stream_test.c)
+    add_executable(eeprom eeprom.c)
 
     # Linkage
     target_link_libraries(simple ftdi)
@@ -32,6 +33,7 @@ if (EXAMPLES)
     target_link_libraries(serial_read ftdi)
     target_link_libraries(baud_test ftdi)
     target_link_libraries(stream_test ftdi)
+    target_link_libraries(eeprom ftdi)
 
     # libftdi++ examples
     if(FTDI_BUILD_CPP)
diff --git a/examples/eeprom.c b/examples/eeprom.c
new file mode 100644
index 0000000..6be43f6
--- /dev/null
+++ b/examples/eeprom.c
@@ -0,0 +1,176 @@
+/* LIBFTDI EEPROM access example
+
+   This program is distributed under the GPL, version 2
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <ftdi.h>
+
+int main(int argc, char **argv)
+{
+    struct ftdi_context ftdic;
+    struct ftdi_eeprom eeprom;
+    unsigned char buf[2048];
+    int size;
+    int f, i, j;
+    int vid = 0x0403;
+    int pid = 0x6010;
+    char const *desc    = 0;
+    char const *serial  = 0;
+    int erase = 0;
+    int use_defaults;
+    int large_chip = 0;
+
+    while ((i = getopt(argc, argv, "d::ev:p:P:S:")) != -1)
+    {
+        switch (i)
+        {
+        case 'd':
+            use_defaults = 1;
+            if(optarg)
+                large_chip = 0x66; 
+            break;
+        case 'e':
+            erase = 1;
+            break;
+        case 'v':
+		vid = strtoul(optarg, NULL, 0);
+		break;
+	case 'p':
+		pid = strtoul(optarg, NULL, 0);
+		break;
+	case 'P':
+                desc = optarg;
+		break;
+	case 'S':
+		serial = optarg;
+		break;
+	default:
+		fprintf(stderr, "usage: %s [options]\n", *argv);
+		fprintf(stderr, "\t-d[num] Work with default valuesfor 128 Byte "
+                        "EEPROM or for 256 Byte EEPROm if some [num] is given\n");
+		fprintf(stderr, "\t-e erase\n");
+		fprintf(stderr, "\t-v verbose decoding\n");
+		fprintf(stderr, "\t-p <number> Search for device with PID == number\n");
+		fprintf(stderr, "\t-v <number> Search for device with VID == number\n");
+		fprintf(stderr, "\t-P <string? Search for device with given "
+                        "product description\n");
+		fprintf(stderr, "\t-S <string? Search for device with given "
+                        "serial number\n");
+		exit(-1);
+        }
+    }
+
+    // Init
+    if (ftdi_init(&ftdic) < 0)
+    {
+        fprintf(stderr, "ftdi_init failed\n");
+        return EXIT_FAILURE;
+    }
+
+    // Select first interface
+    ftdi_set_interface(&ftdic, INTERFACE_ANY);
+
+    // Open device
+    f = ftdi_usb_open_desc(&ftdic, vid, pid, desc, serial);
+    if (f < 0)
+    {
+        fprintf(stderr, "Device VID 0x%04x PID 0x%04x", vid, pid);
+        if(desc)
+            fprintf(stderr, " Desc %s", desc);
+        if(serial)
+            fprintf(stderr, " Serial %s", serial);
+        fprintf(stderr, "\n");
+        fprintf(stderr, "unable to open ftdi device: %d (%s)\n", 
+		f, ftdi_get_error_string(&ftdic));
+
+        exit(-1);
+    }
+
+    if (erase)
+    {
+        ftdi_eeprom_setsize(&ftdic, &eeprom, 2048);
+        f = ftdi_erase_eeprom(&ftdic);
+        if (f < 0)
+        {
+            fprintf(stderr, "Erase failed: %s", 
+                    ftdi_get_error_string(&ftdic));
+            return -2;
+        }
+        if (ftdic.eeprom->chip == -1)
+            fprintf(stderr, "No EEPROM\n");
+        else if (ftdic.eeprom->chip == 0)
+            fprintf(stderr, "Internal EEPROM\n");
+        else
+            fprintf(stderr, "Found 93x%02x\n",ftdic.eeprom->chip);
+        return 0;
+    }        
+
+    size = 2048;
+    memset(buf,0, size);
+    ftdic.eeprom = &eeprom;
+    if(use_defaults)
+    {
+        ftdi_eeprom_initdefaults(&ftdic);
+        ftdic.eeprom->manufacturer="IKDA";
+        ftdic.eeprom->product="CPS-CONN";
+        ftdic.eeprom->serial="0001";
+        ftdic.eeprom->chip= large_chip;
+        ftdic.eeprom->cbus_function[0]= CBUS_BB_RD;
+        ftdic.eeprom->cbus_function[1]= CBUS_CLK48;
+        ftdic.eeprom->cbus_function[2]= CBUS_IOMODE;
+        ftdic.eeprom->cbus_function[3]= CBUS_BB;
+        ftdic.eeprom->cbus_function[4]= CBUS_CLK6;
+        f=(ftdi_eeprom_build(&ftdic, buf));
+        if (f < 0)
+        {
+            fprintf(stderr, "ftdi_eeprom_build: %d (%s)\n", 
+                    f, ftdi_get_error_string(&ftdic));
+            exit(-1);
+        }
+    }
+    else
+    {
+        f = ftdi_read_eeprom(&ftdic, buf);
+        if (f < 0)
+        {
+            fprintf(stderr, "ftdi_read_eeprom: %d (%s)\n", 
+                    f, ftdi_get_error_string(&ftdic));
+            exit(-1);
+        }
+    }
+    fprintf(stderr, "Chip type %d ftdi_eeprom_size: %d\n", ftdic.type, ftdic.eeprom->size);
+    for(i=0; i < ftdic.eeprom->size; i += 16)
+    {
+	fprintf(stdout,"0x%03x:", i);
+	
+	for (j = 0; j< 8; j++)
+	    fprintf(stdout," %02x", buf[i+j]);
+	fprintf(stdout," ");
+	for (; j< 16; j++)
+	    fprintf(stdout," %02x", buf[i+j]);
+	fprintf(stdout," ");
+	for (j = 0; j< 8; j++)
+	    fprintf(stdout,"%c", isprint(buf[i+j])?buf[i+j]:'.');
+	fprintf(stdout," ");
+	for (; j< 16; j++)
+	    fprintf(stdout,"%c", isprint(buf[i+j])?buf[i+j]:'.');
+	fprintf(stdout,"\n");
+    }
+
+    f = ftdi_eeprom_decode(&ftdic,buf, size, 1);
+    {
+        fprintf(stderr, "ftdi_eeprom_decode: %d (%s)\n", 
+		f, ftdi_get_error_string(&ftdic));
+        exit(-1);
+    }
+	
+
+    ftdi_usb_close(&ftdic);
+    ftdi_deinit(&ftdic);
+}
-- 
1.7.1