From: Martin Ling <redacted>
Date: Thu, 14 Nov 2013 22:43:03 +0000 (+0000)
Subject: Add sp_set_flowcontrol helper function.
X-Git-Tag: libserialport-0.1.0~116
X-Git-Url: https://sigrok.org/gitweb/?a=commitdiff_plain;h=18fc2dd12bdc4965f705d3bd6d1ebfda3abdbe80;hp=824dcb45618146cac9103e313e30290f749940d3;p=libserialport.git

Add sp_set_flowcontrol helper function.
---

diff --git a/libserialport.h.in b/libserialport.h.in
index 678a6fa..9ec7bf1 100644
--- a/libserialport.h.in
+++ b/libserialport.h.in
@@ -132,6 +132,14 @@ enum {
 	SP_XONXOFF_INOUT = 3
 };
 
+/* Standard flow control combinations. */
+enum {
+	SP_FLOWCONTROL_NONE = 0,
+	SP_FLOWCONTROL_XONXOFF = 1,
+	SP_FLOWCONTROL_RTSCTS = 2,
+	SP_FLOWCONTROL_DTRDSR = 3
+};
+
 /* Enumeration */
 int sp_get_port_by_name(const char *portname, struct sp_port **port_ptr);
 void sp_free_port(struct sp_port *port);
@@ -148,12 +156,15 @@ int sp_read(struct sp_port *port, void *buf, size_t count);
 int sp_write(struct sp_port *port, const void *buf, size_t count);
 int sp_flush(struct sp_port *port);
 
-/* Port configuration */
+/* Basic port configuration */
 int sp_set_config(struct sp_port *port, struct sp_port_config *config);
 int sp_set_baudrate(struct sp_port *port, int baudrate);
 int sp_set_bits(struct sp_port *port, int bits);
 int sp_set_parity(struct sp_port *port, int parity);
 int sp_set_stopbits(struct sp_port *port, int stopbits);
+int sp_set_flowcontrol(struct sp_port *port, int flowcontrol);
+
+/* Advanced port configuration */
 int sp_set_rts(struct sp_port *port, int rts);
 int sp_set_cts(struct sp_port *port, int cts);
 int sp_set_dtr(struct sp_port *port, int dtr);
diff --git a/serialport.c b/serialport.c
index 732714b..98c1a77 100644
--- a/serialport.c
+++ b/serialport.c
@@ -939,22 +939,55 @@ static int apply_config(struct sp_port *port, struct sp_port_data *data)
 }
 
 #define TRY(x) do { int ret = x; if (ret != SP_OK) return ret; } while (0)
-#define TRY_SET(x) do { if (config->x >= 0) TRY(set_##x(&data, config->x)); } while (0)
+#define TRY_SET(x, y) do { if (y >= 0) TRY(set_##x(&data, y)); } while (0)
+#define TRY_SET_CONFIG(x) TRY_SET(x, config->x)
 
 int sp_set_config(struct sp_port *port, struct sp_port_config *config)
 {
 	struct sp_port_data data;
 
 	TRY(start_config(port, &data));
-	TRY_SET(baudrate);
-	TRY_SET(bits);
-	TRY_SET(parity);
-	TRY_SET(stopbits);
-	TRY_SET(rts);
-	TRY_SET(cts);
-	TRY_SET(dtr);
-	TRY_SET(dsr);
-	TRY_SET(xon_xoff);
+	TRY_SET_CONFIG(baudrate);
+	TRY_SET_CONFIG(bits);
+	TRY_SET_CONFIG(parity);
+	TRY_SET_CONFIG(stopbits);
+	TRY_SET_CONFIG(rts);
+	TRY_SET_CONFIG(cts);
+	TRY_SET_CONFIG(dtr);
+	TRY_SET_CONFIG(dsr);
+	TRY_SET_CONFIG(xon_xoff);
+	TRY(apply_config(port, &data));
+
+	return SP_OK;
+}
+
+int sp_set_flowcontrol(struct sp_port *port, int flowcontrol)
+{
+	struct sp_port_data data;
+
+	TRY(start_config(port, &data));
+
+	if (flowcontrol == SP_FLOWCONTROL_XONXOFF)
+		TRY_SET(xon_xoff, SP_XONXOFF_INOUT);
+	else
+		TRY_SET(xon_xoff, SP_XONXOFF_DISABLED);
+
+	if (flowcontrol == SP_FLOWCONTROL_RTSCTS) {
+		TRY_SET(rts, SP_RTS_FLOW_CONTROL);
+		TRY_SET(cts, SP_CTS_FLOW_CONTROL);
+	} else {
+		TRY_SET(rts, SP_RTS_ON);
+		TRY_SET(cts, SP_CTS_IGNORE);
+	}
+
+	if (flowcontrol == SP_FLOWCONTROL_DTRDSR) {
+		TRY_SET(dtr, SP_DTR_FLOW_CONTROL);
+		TRY_SET(dsr, SP_DSR_FLOW_CONTROL);
+	} else {
+		TRY_SET(dtr, SP_DTR_ON);
+		TRY_SET(dsr, SP_DSR_IGNORE);
+	}
+
 	TRY(apply_config(port, &data));
 
 	return SP_OK;