libusbhost: Open source USB host stack for embedded devices

First public version, date: 1.4.2015

Signed-off-by: Amir Hammad <amir.hammad@hotmail.com>

1 files changed, 186 insertions, 0 deletions

diff --git a/src/demo.c b/src/demo.c
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+/*

+ * This file is part of the libusbhost library

+ * hosted at http://github.com/libusbhost/libusbhost

+ *

+ * Copyright (C) 2015 Amir Hammad <amir.hammad@hotmail.com>

+ *

+ *

+ * libusbhost is free software: you can redistribute it and/or modify

+ * it under the terms of the GNU Lesser General Public License as published by

+ * the Free Software Foundation, either version 3 of the License, or

+ * (at your option) any later version.

+ *

+ * This library 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 Lesser General Public License for more details.

+ *

+ * You should have received a copy of the GNU Lesser General Public License

+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.

+ *

+ */

+

+#include "usart_helpers.h"			/// provides LOG_PRINTF macros used for debugging

+#include "usbh_hubbed.h"			/// provides usbh_init() and usbh_poll()

+#include "usbh_lld_stm32f4.h"		/// provides low level usb host driver for stm32f4 platform

+#include "usbh_driver_hid_mouse.h"	/// provides usb device driver Human Interface Device - type mouse

+#include "usbh_driver_hub.h"		/// provides usb full speed hub driver (Low speed devices on hub are not supported)

+#include "usbh_driver_gp_xbox.h"	/// provides usb device driver for Gamepad: Microsoft XBOX compatible Controller

+

+ // STM32f407 compatible

+#include <libopencm3/stm32/rcc.h>

+#include <libopencm3/stm32/gpio.h>

+#include <libopencm3/stm32/usart.h>

+#include <libopencm3/stm32/timer.h>

+#include <libopencm3/stm32/otg_hs.h>

+#include <libopencm3/stm32/otg_fs.h>

+

+#include <stdint.h>

+#include <string.h>

+#include <stdlib.h>

+

+static inline void delay_ms_busy_loop(uint32_t ms)

+{

+	volatile uint32_t i;

+	for (i = 0; i < 14903*ms; i++);

+}

+

+

+/* Set STM32 to 168 MHz. */

+static void clock_setup(void)

+{

+	rcc_clock_setup_hse_3v3(&hse_8mhz_3v3[CLOCK_3V3_168MHZ]);

+

+	// GPIO

+	rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_IOPAEN);	// OTG_FS + button

+	rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_IOPBEN);	// OTG_HS

+	rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_IOPCEN);	// USART + OTG_FS charge pump

+	rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_IOPDEN);	// LEDS

+

+	// periphery

+	rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_USART6EN);// USART

+	rcc_peripheral_enable_clock(&RCC_AHB2ENR, RCC_AHB2ENR_OTGFSEN);

+	rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_OTGHSEN);

+}

+

+static void gpio_setup(void)

+{

+	/* Set GPIO12-15 (in GPIO port D) to 'output push-pull'. */

+	gpio_mode_setup(GPIOD, GPIO_MODE_OUTPUT,

+			GPIO_PUPD_NONE, GPIO12 | GPIO13 | GPIO14 | GPIO15);

+

+	/* Set	 */

+	gpio_mode_setup(GPIOC, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO0);

+	gpio_clear(GPIOC, GPIO0);

+

+	// OTG_FS

+	gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO11 | GPIO12);

+	gpio_set_af(GPIOA, GPIO_AF10, GPIO11 | GPIO12);

+

+	// OTG_HS

+	gpio_mode_setup(GPIOB, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO15 | GPIO14);

+	gpio_set_af(GPIOB, GPIO_AF12, GPIO14 | GPIO15);

+

+	// USART TX

+	gpio_mode_setup(GPIOC, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO6 | GPIO7);

+	gpio_set_af(GPIOC, GPIO_AF8, GPIO6 | GPIO7);

+

+	// button

+	gpio_mode_setup(GPIOA, GPIO_MODE_INPUT, GPIO_PUPD_NONE, GPIO0);

+}

+

+static const usbh_dev_driver_t *device_drivers[] = {

+	&usbh_hub_driver,

+	&usbh_hid_mouse_driver,

+	&usbh_gp_xbox_driver,

+	0

+};

+

+static void gp_xbox_update(uint8_t device_id, gp_xbox_packet_t packet)

+{

+	(void)device_id;

+	(void)packet;

+	LOG_PRINTF("update %d: %d %d \r\n", device_id, packet.axis_left_x, packet.buttons & GP_XBOX_BUTTON_A);

+}

+

+

+static void gp_xbox_connected(uint8_t device_id)

+{

+	(void)device_id;

+	LOG_PRINTF("connected %d", device_id);

+}

+

+static void gp_xbox_disconnected(uint8_t device_id)

+{

+	(void)device_id;

+	LOG_PRINTF("disconnected %d", device_id);

+}

+

+static const gp_xbox_config_t gp_xbox_config = {

+	.update = &gp_xbox_update,

+	.notify_connected = &gp_xbox_connected,

+	.notify_disconnected = &gp_xbox_disconnected

+};

+

+static void mouse_in_message_handler(uint8_t device_id, const uint8_t *data)

+{

+	(void)device_id;

+	(void)data;

+	// print only first 4 bytes, since every mouse should have at least these four set.

+	// Report descriptors are not read by driver for now, so we do not know what each byte means

+	LOG_PRINTF("MOUSE EVENT %02X %02X %02X %02X \r\n", data[0], data[1], data[2], data[3]);

+}

+

+static const hid_mouse_config_t mouse_config = {

+	.mouse_in_message_handler = &mouse_in_message_handler

+};

+

+int main(void)

+{

+	clock_setup();

+	gpio_setup();

+

+#ifdef USART_DEBUG

+	usart_init(USART6, 921600);

+#endif

+	LOG_PRINTF("\r\n\r\n\r\n\r\n\r\n###################\r\nInit\r\n");

+

+	/**

+	 * device driver initialization

+	 *

+	 * Pass configuration struct where the callbacks are defined

+	 */

+	hid_mouse_driver_init(&mouse_config);

+	hub_driver_init();

+	gp_xbox_driver_init(&gp_xbox_config);

+

+	gpio_set(GPIOD,  GPIO13);

+

+	/**

+	 * Pass array of supported low level drivers

+	 * In case of stm32f407, there are up to two supported OTG hosts on one chip.

+	 * Each one can be enabled or disabled in config.mk - optimization for speed

+	 *

+	 * Pass array of supported device drivers

+	 */

+	usbh_init(usbh_lld_stm32f4_drivers, device_drivers);

+	gpio_clear(GPIOD,  GPIO13);

+

+	LOG_PRINTF("USB init complete\r\n");

+

+	uint32_t i = 0;

+

+	while (1) {

+		LOG_FLUSH();

+

+		// Toggle some led

+		gpio_set(GPIOD,  GPIO14);

+		usbh_poll(i);

+		gpio_clear(GPIOD,  GPIO14);

+

+		delay_ms_busy_loop(1);

+		i += 1000;

+	}

+

+	return 0;

+}