From 0dbfc94be9d0f4fd5b72ab3c6f15f9b18d4096e3 Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Sat, 11 Apr 2020 15:53:17 +0200
Subject: [PATCH] DMX: A simple test program

---
 dmx/test/Makefile |  9 ++++++
 dmx/test/test.c   | 73 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 82 insertions(+)
 create mode 100644 dmx/test/Makefile
 create mode 100644 dmx/test/test.c

diff --git a/dmx/test/Makefile b/dmx/test/Makefile
new file mode 100644
index 0000000..a31dce1
--- /dev/null
+++ b/dmx/test/Makefile
@@ -0,0 +1,9 @@
+UCWCF:=$(shell PKG_CONFIG_PATH=$(LIBUCW)/lib/pkgconfig pkg-config --cflags libucw)
+UCWLF:=$(shell PKG_CONFIG_PATH=$(LIBUCW)/lib/pkgconfig pkg-config --libs libucw)
+
+CFLAGS=-std=gnu99 -O2 -Wall -Wextra -Wno-parentheses $(UCWCF)
+LDLIBS=-lusb-1.0 $(UCWLF)
+
+all: test
+
+test: test.c
diff --git a/dmx/test/test.c b/dmx/test/test.c
new file mode 100644
index 0000000..210b136
--- /dev/null
+++ b/dmx/test/test.c
@@ -0,0 +1,73 @@
+#include <ucw/lib.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <time.h>
+#include <libusb-1.0/libusb.h>
+
+#include "../firmware/interface.h"
+
+struct libusb_context *usb_ctxt;
+struct libusb_device_handle *devh;
+
+static libusb_device *find_device(void)
+{
+  libusb_device **devlist;
+  ssize_t devn = libusb_get_device_list(usb_ctxt, &devlist);
+  if (devn < 0)
+    {
+      fprintf(stderr, "Cannot enumerate USB devices: error %d\n", (int) devn);
+      exit(1);
+    }
+
+  for (ssize_t i=0; i<devn; i++)
+    {
+      struct libusb_device_descriptor desc;
+      libusb_device *dev = devlist[i];
+      if (!libusb_get_device_descriptor(dev, &desc))
+	{
+	  if (desc.idVendor == DMX_USB_VENDOR && desc.idProduct == DMX_USB_PRODUCT)
+	    {
+	      printf("Found device at usb%d.%d\n", libusb_get_bus_number(dev), libusb_get_device_address(dev));
+	      // FIXME: Free device list
+	      return dev;
+	    }
+	}
+    }
+
+  libusb_free_device_list(devlist, 1);
+  fprintf(stderr, "Device not found\n");
+  exit(1);
+}
+
+int main(int argc, char **argv)
+{
+  if (argc != 3)
+    die("Usage: test <val1> <val2>");
+  int x = atoi(argv[1]);
+  int y = atoi(argv[2]);
+
+  int err;
+  if (err = libusb_init(&usb_ctxt))
+    die("Cannot initialize libusb: error %d", err);
+
+  libusb_device *dev = find_device();
+
+  if (err = libusb_open(dev, &devh))
+    die("Cannot open device: error %d", err);
+  // libusb_reset_device(devh);
+  if (err = libusb_claim_interface(devh, 0))
+    die("Cannot claim interface: error %d", err);
+
+  byte packet[5] = { 0, x, y, 0, 0 };
+  int len = sizeof(packet);
+  int transferred;
+  if (err = libusb_bulk_transfer(devh, 0x01, packet, len, &transferred, 1000))
+    die("Transfer failed: error %d\n", err);
+  if (transferred != len)
+    die("Short transfer: %d out of %d bytes", transferred, len);
+
+  return 0;
+}
-- 
2.39.2