Added simple USB example for STM32F107.

examples/stm32/stm32-h107/usb_simple/Makefile

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+##
+## This file is part of the libopencm3 project.
+##
+## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+##
+## 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/>.
+##
+
+BINARY = usb_simple
+
+include ../../Makefile.include
+

examples/stm32/stm32-h107/usb_simple/README

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+------------------------------------------------------------------------------
+README
+------------------------------------------------------------------------------
+
+This is small USB controlled LED blinking example program using libopencm3.
+
+It's intended for the ST STM32-based Olimex STM32-H107 eval board (see
+http://olimex.com/dev/stm32-h107.html for details).  The usbtest.py
+script in this directory maybe used to control the LED.
+

examples/stm32/stm32-h107/usb_simple/usb_simple.c

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+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2011  Gareth McMullin <gareth@blacksphere.co.nz>
+ *
+ * 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 <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+
+#include <libopencm3/usb/usbd.h>
+
+const struct usb_device_descriptor dev = {
+        .bLength = USB_DT_DEVICE_SIZE,
+        .bDescriptorType = USB_DT_DEVICE,
+        .bcdUSB = 0x0200,
+        .bDeviceClass = 0xFF,
+        .bDeviceSubClass = 0,
+        .bDeviceProtocol = 0,
+        .bMaxPacketSize0 = 64,
+        .idVendor = 0xCAFE,
+        .idProduct = 0xCAFE,
+        .bcdDevice = 0x0200,
+        .iManufacturer = 1,
+        .iProduct = 2,
+        .iSerialNumber = 3,
+        .bNumConfigurations = 1,
+};
+
+const struct usb_interface_descriptor iface = {
+	.bLength = USB_DT_INTERFACE_SIZE,
+	.bDescriptorType = USB_DT_INTERFACE,
+	.bInterfaceNumber = 0,
+	.bAlternateSetting = 0,
+	.bNumEndpoints = 0,
+	.bInterfaceClass = 0xFF,
+	.bInterfaceSubClass = 0,
+	.bInterfaceProtocol = 0,
+	.iInterface = 0,
+};
+
+const struct usb_interface ifaces[] = {{
+	.num_altsetting = 1,
+	.altsetting = &iface,
+}};
+
+const struct usb_config_descriptor config = {
+	.bLength = USB_DT_CONFIGURATION_SIZE,
+	.bDescriptorType = USB_DT_CONFIGURATION,
+	.wTotalLength = 0,
+	.bNumInterfaces = 1,
+	.bConfigurationValue = 1,
+	.iConfiguration = 0,
+	.bmAttributes = 0x80,
+	.bMaxPower = 0x32,
+
+	.interface = ifaces,
+};
+
+const char *usb_strings[] = {
+	"x",
+	"Black Sphere Technologies",
+	"Simple Device",
+	"1001"
+};
+
+static int simple_control_callback(struct usb_setup_data *req, u8 **buf, 
+		u16 *len, void (**complete)(struct usb_setup_data *req))
+{
+	(void)buf;
+	(void)len;
+	(void)complete;
+
+	if(req->bmRequestType != 0x40) 
+		return 0; /* Only accept vendor request */
+	
+	if(req->wValue & 1)
+		gpio_set(GPIOC, GPIO6);
+	else
+		gpio_clear(GPIOC, GPIO6);
+
+	return 1;
+}
+
+int main(void)
+{
+	rcc_clock_setup_in_hse_8mhz_out_72mhz();
+
+	rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_OTGFSEN);
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
+
+	/* LED output */
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ, 
+			GPIO_CNF_OUTPUT_PUSHPULL, GPIO6);
+
+	usbd_init(&stm32f107_usb_driver, &dev, &config, usb_strings);
+	usbd_register_control_callback(
+				USB_REQ_TYPE_VENDOR, 
+				USB_REQ_TYPE_TYPE,
+				simple_control_callback);
+
+	while (1) 
+		usbd_poll();
+}
+

examples/stm32/stm32-h107/usb_simple/usb_simple.ld

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+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * 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/>.
+ */
+
+/* Linker script for Olimex STM32-H107 (STM32F107VCT6, 256K flash, 64K RAM). */
+
+/* Define memory regions. */
+MEMORY
+{
+	rom (rx) : ORIGIN = 0x08000000, LENGTH = 256K
+	ram (rwx) : ORIGIN = 0x20000000, LENGTH = 64K
+}
+
+/* Include the common ld script. */
+INCLUDE libopencm3_stm32.ld
+