X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Fmodbus%2Fmodbus_serial_rtu.c;h=065c25f67a355f23316bb5a186aad1300ec2be42;hb=f2bbcc330a6bcb65500b298bec8c40974ed246d4;hp=b723020ba257064d492dd0d111d5b27102645656;hpb=c1aae90038456a61d0f9313d34e6107c3440d3e7;p=libsigrok.git

diff --git a/src/modbus/modbus_serial_rtu.c b/src/modbus/modbus_serial_rtu.c
index b723020b..065c25f6 100644
--- a/src/modbus/modbus_serial_rtu.c
+++ b/src/modbus/modbus_serial_rtu.c
@@ -17,6 +17,7 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <config.h>
 #include <glib.h>
 #include <stdlib.h>
 #include <string.h>
@@ -108,20 +109,20 @@ static int modbus_serial_rtu_send(void *priv,
 	uint8_t slave_addr = modbus->slave_addr;
 	uint16_t crc;
 
-	result = serial_write_nonblocking(serial, &slave_addr, sizeof(slave_addr));
+	result = serial_write_blocking(serial, &slave_addr, sizeof(slave_addr), 0);
 	if (result < 0)
-		return result;
+		return SR_ERR;
 
-	result = serial_write_nonblocking(serial, buffer, buffer_size);
+	result = serial_write_blocking(serial, buffer, buffer_size, 0);
 	if (result < 0)
-		return result;
+		return SR_ERR;
 
 	crc = modbus_serial_rtu_crc(0xFFFF, &slave_addr, sizeof(slave_addr));
 	crc = modbus_serial_rtu_crc(crc, buffer, buffer_size);
 
-	result = serial_write_nonblocking(serial, &crc, sizeof(crc));
+	result = serial_write_blocking(serial, &crc, sizeof(crc), 0);
 	if (result < 0)
-		return result;
+		return SR_ERR;
 
 	return SR_OK;
 }
@@ -132,13 +133,13 @@ static int modbus_serial_rtu_read_begin(void *priv, uint8_t *function_code)
 	uint8_t slave_addr;
 	int ret;
 
-	ret = serial_read_blocking(modbus->serial, &slave_addr, 1, 100);
+	ret = serial_read_blocking(modbus->serial, &slave_addr, 1, 500);
 	if (ret != 1 || slave_addr != modbus->slave_addr)
-		return ret;
+		return SR_ERR;
 
 	ret = serial_read_blocking(modbus->serial, function_code, 1, 100);
 	if (ret != 1)
-		return ret;
+		return SR_ERR;
 
 	modbus->crc = modbus_serial_rtu_crc(0xFFFF, &slave_addr, sizeof(slave_addr));
 	modbus->crc = modbus_serial_rtu_crc(modbus->crc, function_code, 1);
@@ -151,11 +152,11 @@ static int modbus_serial_rtu_read_data(void *priv, uint8_t *buf, int maxlen)
 	struct modbus_serial_rtu *modbus = priv;
 	int ret;
 
-	ret = serial_read_nonblocking(modbus->serial, buf, maxlen); 
+	ret = serial_read_nonblocking(modbus->serial, buf, maxlen);
 	if (ret < 0)
 		return ret;
-	modbus->crc = modbus_serial_rtu_crc(modbus->crc, buf, ret); 
-	return ret; 
+	modbus->crc = modbus_serial_rtu_crc(modbus->crc, buf, ret);
+	return ret;
 }
 
 static int modbus_serial_rtu_read_end(void *priv)
@@ -166,7 +167,7 @@ static int modbus_serial_rtu_read_end(void *priv)
 
 	ret = serial_read_blocking(modbus->serial, &crc, sizeof(crc), 100);
 	if (ret != 2)
-		return ret;
+		return SR_ERR;
 
 	if (crc != modbus->crc) {
 		sr_err("CRC error (0x%04X vs 0x%04X).", crc, modbus->crc);