1 files changed, 83 insertions, 0 deletions
diff --git a/host/usrp_e_utils/usrp-e-gpio.c b/host/usrp_e_utils/usrp-e-gpio.c
new file mode 100644
index 000000000..4b788e945
--- /dev/null
+++ b/host/usrp_e_utils/usrp-e-gpio.c
@@ -0,0 +1,83 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/ioctl.h>
+
+#include "linux/usrp_e.h"
+#include "e100_regs.hpp"
+
+// Usage: usrp_e_gpio <string>
+
+static int fp;
+
+static int read_reg(__u16 reg)
+{
+	int ret;
+	struct usrp_e_ctl16 d;
+
+	d.offset = reg;
+	d.count = 1;
+	ret = ioctl(fp, USRP_E_READ_CTL16, &d);
+	return d.buf[0];
+}
+
+static void write_reg(__u16 reg, __u16 val)
+{
+	int ret;
+	struct usrp_e_ctl16 d;
+
+	d.offset = reg;
+	d.count = 1;
+	d.buf[0] = val;
+	ret = ioctl(fp, USRP_E_WRITE_CTL16, &d);
+}
+
+int main(int argc, char *argv[])
+{
+	int i, test, data_in;
+
+	test = 0;
+	if (argc > 1)
+		test = 1;
+
+	fp = open("/dev/usrp_e0", O_RDWR);
+	printf("fp = %d\n", fp);
+
+	write_reg(E100_REG_GPIO_TX_DDR, 0x0);
+	write_reg(E100_REG_GPIO_RX_DDR, 0xFFFF);
+
+	for (i=0; i < 16; i++) {
+		write_reg(E100_REG_GPIO_RX_IO, 1 << i);
+		sleep(1);
+		if (test) {
+			data_in = read_reg(E100_REG_GPIO_TX_IO);
+			if (data_in != (1 << i))
+				printf("Read failed, wrote: %X read: %X\n", \
+					1 << i, data_in);
+		}
+	}
+
+	write_reg(E100_REG_GPIO_RX_DDR, 0x0);
+	write_reg(E100_REG_GPIO_TX_DDR, 0xFFFF);
+
+	sleep(1);
+
+	for (i=0; i < 16; i++) {
+		write_reg(E100_REG_GPIO_TX_IO, 1 << i);
+		sleep(1);
+		if (test) {
+			data_in = read_reg(E100_REG_GPIO_RX_IO);
+			if (data_in != (1 << i))
+				printf("Read failed, wrote: %X read: %X\n", \
+					1 << i, data_in);
+		}
+	}
+
+	write_reg(E100_REG_GPIO_RX_DDR, 0x0);
+	write_reg(E100_REG_GPIO_TX_DDR, 0x0);
+
+	return 0;
+}