Add switch -n for flow control nonev0.3.7

-n, --none  Set the flow control to NONE. Default is CTS/RTS.
This is useful for eLeMeNt ZX and machines or serial port without CTS/RTS wires.

1 files changed, 23 insertions, 6 deletions

diff --git a/sercp.c b/sercp.c
index 66baefb..9bfb831 100644
--- a/sercp.c
+++ b/sercp.c
@@ -68,7 +68,7 @@
 #define FALSE 0
 #define true 1
 #define TRUE 1
-const char* _version = "v0.3.6";
+const char* _version = "v0.3.7";
 // SERIAL
 FILE *tapout_fd = NULL;
 int is_outfile = 0;
@@ -88,6 +88,7 @@ long pos = 0;
 int scp = 0;
 int is_scp_read = 0;
 int is_continue = 1;
+int is_flow_control_none = 0;			// 1 - set flow control to NONE
 
 // prototypes
 
@@ -131,7 +132,7 @@ typedef struct {
 FILEINFO fileinfo;
 
 void usage(void) {
-	printf ("sercp %s (c)2018-2020 Pavel Vymetalek <pavel@vym.cz>\n", _version);
+	printf ("sercp %s (c)2018-2023 Pavel Vymetalek <pavel@vym.cz>\n", _version);
 	printf ("serial copy for transfering file to/from ZX Spectrum 128 AY's RS232\n");
 	printf ("Uses 1109bytes of fileinfo - blocks sums, filename, etc.\n");
 	printf ("More info at https://vym.cz/sercp/\n");
@@ -144,6 +145,7 @@ void usage(void) {
 	printf ("\t-d, --device\tSerial communication device\n");
 #endif
 	printf ("\t-b, --baud\tSet the communication speed. Default 38400Bd\n");
+	printf ("\t-n, --none\tSet the flow control to NONE. Default is CTS/RTS\n\t\t\tThis is useful for eLeMeNt ZX and machines or serial port without CTS/RTS wires\n");
 	printf ("\t-w, --wait\tWaiting in milliseconds between transmitted blocks.\n\t\t\tDefault is -w 800 ms\n");
 	printf ("\t-r, --read\tRead file from serial port\n");
 }
@@ -159,12 +161,13 @@ void TestArgs (int argc, char *argv[])
 			{"device", required_argument, NULL, 'd'},
 			{"baud", required_argument, NULL, 'b'},
 			{"wait", required_argument, NULL, 'w'},
+			{"none", no_argument, NULL, 'n'},
 			{"read", no_argument, NULL, 'r'},
 			{"version", no_argument, NULL, 'v'},
 			{"help", no_argument, NULL, 'h'},
 			{0, 0, 0, 0}
 		};
-		c = getopt_long (argc, argv, "d:b:w:rvh", long_options, &option_index);
+		c = getopt_long (argc, argv, "d:b:w:nrvh", long_options, &option_index);
 		if (c == -1) {
 			// end of arguments
 			break;
@@ -186,6 +189,9 @@ void TestArgs (int argc, char *argv[])
 			case 'r':
 				is_scp_read = 1;
 				break;
+			case 'n':
+				is_flow_control_none = 1;
+				break;
 			case 'v':
 				printf ("%s\n", _version);
 				exit(1);
@@ -770,14 +776,25 @@ int OpenUart() {
 	cfsetospeed(&newtio, baud_rate);
 	cfsetispeed(&newtio, baud_rate);		// set ispeed same as ospeed (see POSIX)
 #if defined (__APPLE__) || defined (BSD)
-	newtio.c_cflag |= CS8 | CLOCAL | CREAD | CCTS_OFLOW | CRTS_IFLOW | HUPCL;
+	if (is_flow_control_none) {
+		printf("Sorry, flow control is not tested on this platform\n");
+		newtio.c_cflag |= CS8 | CLOCAL | CREAD | HUPCL;
+	} else {
+		newtio.c_cflag |= CS8 | CLOCAL | CREAD | CCTS_OFLOW | CRTS_IFLOW | HUPCL;
+	}
 #else
-	newtio.c_cflag |= CS8 | CLOCAL | CREAD | CRTSCTS;
+	if (is_flow_control_none) {
+		// usefull for eLeMeNt ZX and machines or serial port without CTS/RTS wires
+		newtio.c_cflag |= CS8 | CLOCAL | CREAD;
+	} else {
+		// standard CTS/RTS flow control
+		newtio.c_cflag |= CS8 | CLOCAL | CREAD | CRTSCTS;
+	}
 #endif
 	newtio.c_iflag &= ~(IXON | IXOFF | IXANY);
 	newtio.c_oflag &= ~(OPOST);
 	newtio.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);		// raw input
-	printf ("Serial device: %s, communication speed is: %d Bd\n", SERIALDEVICE, baud_rate);
+	printf ("Serial device: %s, communication speed is: %d Bd, flow control: %s\n", SERIALDEVICE, baud_rate, (is_flow_control_none)?"None":"CTS/RTS");
 
 	// http://unixwiz.net/techtips/termios-vmin-vtime.html
 	newtio.c_cc[VMIN] = 1;	// minimum number to read