fx2lafw: Implemented initial support for start capture

hardware/fx2lafw/Makefile.am

@@ -25,6 +25,8 @@ AM_CPPFLAGS = -DFIRMWARE_DIR='"$(FIRMWARE_DIR)"'
 noinst_LTLIBRARIES = libsigrokhwfx2lafw.la
 
 libsigrokhwfx2lafw_la_SOURCES = \
+	command.c \
+	command.h \
 	fx2lafw.c \
 	fx2lafw.h
 

hardware/fx2lafw/command.c

@@ -0,0 +1,39 @@
+/*
+ * This file is part of the sigrok project.
+ *
+ * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libusb.h>
+
+#include "command.h"
+#include "sigrok.h"
+#include "sigrok-internal.h"
+
+int command_start_acquisition(libusb_device_handle *devhdl)
+{
+	const int res = libusb_control_transfer(devhdl,
+				LIBUSB_REQUEST_TYPE_VENDOR |
+				LIBUSB_ENDPOINT_OUT, CMD_START, 0x0000,
+				0x0000, NULL, 0, 100);
+	if (res < 0) {
+		sr_err("fx2lafw: Unable to send start command: %d",
+			res);
+		return SR_ERR;
+	}
+
+	return SR_OK;
+}

hardware/fx2lafw/command.h

@@ -0,0 +1,26 @@
+/*
+ * This file is part of the sigrok project.
+ *
+ * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* Protocol commands */
+#define CMD_SET_SAMPLERATE	0xb0
+#define CMD_START		0xb1
+#define CMD_STOP		0xb2
+#define CMD_GET_FW_VERSION	0xb3
+
+int command_start_acquisition(libusb_device_handle *devhdl);

hardware/fx2lafw/fx2lafw.c

@@ -26,6 +26,7 @@
 #include "sigrok.h"
 #include "sigrok-internal.h"
 #include "fx2lafw.h"
+#include "command.h"
 
 static struct fx2lafw_profile supported_fx2[] = {
 	/* USBee AX */
@@ -590,7 +591,7 @@ static int hw_dev_acquisition_start(int dev_index, void *cb_data)
 	struct context *ctx;
 	struct libusb_transfer *transfer;
 	const struct libusb_pollfd **lupfd;
-	int size, i;
+	int err, size, i;
 	unsigned char *buf;
 
 	if (!(sdi = sr_dev_inst_get(dev_insts, dev_index)))
@@ -608,6 +609,10 @@ static int hw_dev_acquisition_start(int dev_index, void *cb_data)
 		return SR_ERR_MALLOC;
 	}
 
+	if ((err = command_start_acquisition (ctx->usb->devhdl)) != SR_OK) {
+		return err;
+	}
+
 	/* Start with 2K transfer, subsequently increased to 4K. */
 	size = 2048;
 	for (i = 0; i < NUM_SIMUL_TRANSFERS; i++) {