Set only SCK and SDO pins to 0 after sending command

Modified FT245R programmer to only set SCK and SDO pins to 0 after sending the command. This way if e.g. RESET was active before the command, it will stay active. Was having some trouble communicating with an AT89S52, was only able to make it work by manually connecting the reset line to 5V - this fixed the problem.

src/ft245r.c

@@ -111,6 +111,7 @@ void ft245r_initpgm(PROGRAMMER *pgm) {
 #define REQ_OUTSTANDINGS      10
 
 #define FT245R_DEBUG	0
+#define FT245R_DEBUG_DATA	0
 /*
   Some revisions of the FTDI chips mess up the timing in bitbang mode
   unless the bitclock is set to the max (3MHz).  For example, see:
@@ -200,6 +201,14 @@ static int ft245r_fill(const PROGRAMMER *pgm) {
 #if FT245R_DEBUG
     msg_info("%s: read %d bytes (pending=%d)\n",  __func__, nread, my.rx.pending);
 #endif
+
+#if FT245R_DEBUG_DATA
+    msg_info("%s: read data:",  __func__);
+    for (i = 0; i < nread; ++i)
+        msginfo(" %02x", raw[i]);
+
+    msginfo("\n");
+#endif
     for (i = 0; i < nread; ++i)
 	ft245r_rx_buf_put(pgm, raw[i]);
     return nread;
@@ -238,6 +247,14 @@ static int ft245r_flush(const PROGRAMMER *pgm) {
 #if FT245R_DEBUG
 	msg_info("%s: writing %d bytes\n", __func__, avail);
 #endif
+
+#if FT245R_DEBUG_DATA
+    msg_info("%s: write data:",  __func__);
+    for (int i = 0; i < avail; ++i)
+        msginfo(" %02x", src[i]);
+
+    msginfo("\n");
+#endif
 	rv = ftdi_write_data(my.handle, src, avail);
 	if (rv != avail) {
 	    msg_error("write returned %d (expected %d): %s\n", rv, avail, ftdi_get_error_string(my.handle));
@@ -680,7 +697,9 @@ static int ft245r_cmd(const PROGRAMMER *pgm, const unsigned char *cmd, unsigned
     for (i=0; i<4; i++) {
         buf_pos += set_data(pgm, buf+buf_pos, cmd[i]);
     }
-    buf[buf_pos] = 0;
+    my.ft245r_out = SET_BITS_0(my.ft245r_out, pgm, PIN_AVR_SDO, 0);
+    my.ft245r_out = SET_BITS_0(my.ft245r_out, pgm, PIN_AVR_SCK, 0);
+    buf[buf_pos] = my.ft245r_out;
     buf_pos++;
 
     ft245r_send (pgm, buf, buf_pos);