3 files changed, 34 insertions, 25 deletions
diff --git a/commandline/Makefile b/commandline/Makefile
index 587f86c..3a1c918 100644
--- a/commandline/Makefile
+++ b/commandline/Makefile
@@ -9,7 +9,7 @@ LIBS      = $(USBLIBS)
 PREFIX ?= /usr/local
 bin_dir = ${DESTDIR}${PREFIX}/bin
 
-PROGRAMS = vusb-i2c vusb-i2cdetect vusb-i2cwrite vusb-i2cget
+PROGRAMS = vusb-i2c vusb-i2cdetect vusb-i2cset vusb-i2cget
 
 all: $(PROGRAMS)
 
@@ -19,7 +19,7 @@ all: $(PROGRAMS)
 i2c.o: i2c.c i2c-util.c i2c-util.h
 i2c-util.o: i2c-util.c
 i2cdetect.o: i2cdetect.c i2c-util.c i2c-util.h
-i2cwrite.o: i2cwrite.c i2c-util.c i2c-util.h
+i2cset.o: i2cset.c i2c-util.c i2c-util.h
 i2cget.o: i2cget.c i2c-util.c i2c-util.h
 
 vusb-i2c: i2c.o i2c-util.o
@@ -28,7 +28,7 @@ vusb-i2c: i2c.o i2c-util.o
 vusb-i2cdetect: i2cdetect.o i2c-util.o
 	$(CC) -o $@ $^ $(LIBS)
 
-vusb-i2cwrite: i2cwrite.o i2c-util.o
+vusb-i2cset: i2cset.o i2c-util.o
 	$(CC) -o $@ $^ $(LIBS)
 
 vusb-i2cget: i2cget.o i2c-util.o
diff --git a/commandline/i2cset.c b/commandline/i2cset.c
new file mode 100644
index 0000000..971783a
--- /dev/null
+++ b/commandline/i2cset.c
@@ -0,0 +1,31 @@
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "i2c-util.h"
+
+int main(int argc, char **argv)
+{
+	int i, address, got_ack;
+
+	i2c_init();
+	i2c_start();
+
+	if (argc < 3) {
+		fputs("Usage: i2cset <address> <data ...>", stderr);
+		return 1;
+	}
+
+	address = atoi(argv[1]) << 1;
+
+	got_ack = i2c_tx_byte(address);
+
+	for (i = 2; i < argc; i++) {
+		i2c_tx_byte(atoi(argv[i]));
+	}
+
+	i2c_stop();
+	i2c_deinit();
+
+	return got_ack ? 0 : 1;
+}
diff --git a/commandline/i2cwrite.c b/commandline/i2cwrite.c
deleted file mode 100644
index 56031f9..0000000
--- a/commandline/i2cwrite.c
+++ /dev/null
@@ -1,22 +0,0 @@
-#include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "i2c-util.h"
-
-int main(int argc, char **argv)
-{
-	int i;
-
-	i2c_init();
-	i2c_start();
-
-	for (i = 1; i < argc; i++) {
-		i2c_tx_byte(atoi(argv[i]));
-	}
-
-	i2c_stop();
-	i2c_deinit();
-
-	return 0;
-}