libftdi: (tomj) updated ft2232 bitbang mode example

[libftdi] / examples / bitbang_ft2232.c

diff --git a/examples/bitbang_ft2232.c b/examples/bitbang_ft2232.c
index 17b6472..cb62664 100644 (file)
--- a/examples/bitbang_ft2232.c
+++ b/examples/bitbang_ft2232.c
@@ -1,4 +1,12 @@
-/* This program is distributed under the GPL, version 2 */
+/* bitbang_ft2232.c
+
+   Output some flickering in bitbang mode to the FT2232
+
+   Thanks to max@koeln.ccc.de for fixing and extending
+   the example for the second channel.
+
+   This program is distributed under the GPL, version 2
+*/
 
 #include <stdio.h>
 #include <unistd.h>
@@ -6,82 +14,76 @@
 
 int main(int argc, char **argv)
 {
-    struct ftdi_context ftdic,ftdic2;
+    struct ftdi_context ftdic, ftdic2;
+    char buf[1];
     int f,i;
 
+    // Init 1. channel
     ftdi_init(&ftdic);
-
+    ftdi_set_interface(&ftdic, INTERFACE_A);
     f = ftdi_usb_open(&ftdic, 0x0403, 0x6001);
-
     if(f < 0 && f != -5) {
         fprintf(stderr, "unable to open ftdi device: %d (%s)\n", f, ftdi_get_error_string(&ftdic));
         exit(-1);
     }
+    printf("ftdi open succeeded(channel 1): %d\n",f);
 
-    printf("ftdi open succeeded: %d\n",f);
-
-    printf("enabling bitbang mode\n");
+    printf("enabling bitbang mode(channel 1)\n");
     ftdi_enable_bitbang(&ftdic, 0xFF);
 
-    ftdic2.interface=1;
-    ftdic2.index=1;
-    ftdic2.out_ep=0x83;
-    ftdic2.in_ep=0x4;
-
+    // Init 2. channel
+    ftdi_init(&ftdic2);
+    ftdi_set_interface(&ftdic2, INTERFACE_B);
     f = ftdi_usb_open(&ftdic2, 0x0403, 0x6001);
-
     if(f < 0 && f != -5) {
-        fprintf(stderr, "unable to open ftdi device: %d (%s)\n", f, ftdi_get_error_string(&ftdic));
+        fprintf(stderr, "unable to open ftdi device: %d (%s)\n", f, ftdi_get_error_string(&ftdic2));
         exit(-1);
     }
+    printf("ftdi open succeeded(channel 2): %d\n",f);
 
-    printf("ftdi open succeeded: %d\n",f);
-
-    printf("enabling bitbang mode\n");
+    printf("enabling bitbang mode (channel 2)\n");
     ftdi_enable_bitbang(&ftdic2, 0xFF);
 
+    // Write data
+    printf("startloop\n");
+    for(i = 0; i < 23; i++) {
+        buf[0] =  0x1;
+        printf("porta: %02i: 0x%02x \n",i,buf[0]);
+        f = ftdi_write_data(&ftdic, buf, 1);
+        if(f < 0)
+            fprintf(stderr,"write failed on channel 1 for 0x%x, error %d (%s)\n", buf[0], f, ftdi_get_error_string(&ftdic));
+        sleep(1);
 
-    char buf[1];
-
-    sleep(3);
-
-    buf[0] = 0x0;
-    printf("turning everything on\n");
-    f = ftdi_write_data(&ftdic, buf, 1);
-    if(f < 0) {
-        fprintf(stderr,"write failed for 0x%x, error %d (%s)\n", buf[0], f, ftdi_get_error_string(&ftdic));
-    }
-
-    sleep(3);
-
-    buf[0] = 0xFF;
-    printf("turning everything off\n");
-    f = ftdi_write_data(&ftdic, buf, 1);
-    if(f < 0) {
-        fprintf(stderr,"write failed for 0x%x, error %d (%s)\n", buf[0], f, ftdi_get_error_string(&ftdic));
-    }
+        buf[0] =  0x2;
+        printf("porta: %02i: 0x%02x \n",i,buf[0]);
+        f = ftdi_write_data(&ftdic, buf, 1);
+        if(f < 0)
+            fprintf(stderr,"write failed on channel 1 for 0x%x, error %d (%s)\n", buf[0], f, ftdi_get_error_string(&ftdic));
+        sleep(1);
 
-    sleep(3);
+        buf[0] =  0x1;
+        printf("portb: %02i: 0x%02x \n",i,buf[0]);
+        f = ftdi_write_data(&ftdic2, buf, 1);
+        if(f < 0)
+            fprintf(stderr,"write failed on channel 2 for 0x%x, error %d (%s)\n", buf[0], f, ftdi_get_error_string(&ftdic2));
+        sleep(1);
 
-    for(i = 0; i < 32; i++) {
-        buf[0] =  0 | (0xFF ^ 1 << (i % 8));
-        if( i > 0 && (i % 8) == 0) {
-            printf("\n");
-        }
-        printf("%02hhx ",buf[0]);
-        fflush(stdout);
-        f = ftdi_write_data(&ftdic, buf, 1);
-        if(f < 0) {
-            fprintf(stderr,"write failed for 0x%x, error %d (%s)\n", buf[0], f, ftdi_get_error_string(&ftdic));
-        }
+        buf[0] =  0x2;
+        printf("portb: %02i: 0x%02x \n",i,buf[0]);
+        f = ftdi_write_data(&ftdic2, buf, 1);
+        if(f < 0)
+            fprintf(stderr,"write failed on channel 2 for 0x%x, error %d (%s)\n", buf[0], f, ftdi_get_error_string(&ftdic2));
         sleep(1);
     }
-
     printf("\n");
 
-    printf("disabling bitbang mode\n");
+    printf("disabling bitbang mode(channel 1)\n");
     ftdi_disable_bitbang(&ftdic);
-
     ftdi_usb_close(&ftdic);
     ftdi_deinit(&ftdic);
+
+    printf("disabling bitbang mode(channel 2)\n");
+    ftdi_disable_bitbang(&ftdic2);
+    ftdi_usb_close(&ftdic2);
+    ftdi_deinit(&ftdic2);
 }