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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_core.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.h" /// provides generic usb device driver for Human Interface Device (HID)
#include "usbh_driver_hub.h" /// provides usb full speed hub driver (Low speed devices on hub are not supported)
// 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>
#define UNUSED(var) ((void)var)
static inline void delay_ms_busy_loop(uint32_t ms) {
for (volatile uint32_t 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]);
rcc_periph_clock_enable(RCC_GPIOA);
rcc_periph_clock_enable(RCC_GPIOE);
rcc_periph_clock_enable(RCC_USART1);
rcc_periph_clock_enable(RCC_USART2);
rcc_periph_clock_enable(RCC_OTGFS);
rcc_periph_clock_enable(RCC_OTGHS);
rcc_periph_clock_enable(RCC_TIM6);
}
/* setup 10kHz timer */
static void tim6_setup(void) {
timer_reset(TIM6);
timer_set_prescaler(TIM6, 8400 - 1); // 84Mhz/10kHz - 1
timer_set_period(TIM6, 65535); // Overflow in ~6.5 seconds
timer_enable_counter(TIM6);
}
static uint32_t tim6_get_time_us(void)
{
uint32_t cnt = timer_get_counter(TIM6);
// convert to 1MHz less precise timer value -> units: microseconds
uint32_t time_us = cnt * 100;
return time_us;
}
static void gpio_setup(void)
{
/* D2, D3 LEDs */
gpio_mode_setup(GPIOA, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO6 | GPIO7);
/* USB OTG FS phy outputs */
gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO11 | GPIO12);
gpio_set_af(GPIOA, GPIO_AF10, GPIO11 | GPIO12);
/* USART1 (debug) */
gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO9 | GPIO10);
gpio_set_af(GPIOA, GPIO_AF7, GPIO9 | GPIO10);
/* USART2 (host link) */
gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO2 | GPIO3);
gpio_set_af(GPIOA, GPIO_AF7, GPIO2 | GPIO3);
/* K0 (PE4)/K1 (PE3) buttons */
gpio_mode_setup(GPIOE, GPIO_MODE_INPUT, GPIO_PUPD_PULLUP, GPIO3 | GPIO4);
}
static const usbh_dev_driver_t *device_drivers[] = {
&usbh_hub_driver,
&usbh_hid_driver,
NULL
};
static const usbh_low_level_driver_t * const lld_drivers[] = {
&usbh_lld_stm32f4_driver_fs, // Make sure USE_STM32F4_USBH_DRIVER_FS is defined in usbh_config.h
NULL
};
static void hid_in_message_handler(uint8_t device_id, const uint8_t *data, uint32_t length)
{
UNUSED(device_id);
UNUSED(data);
if (length < 4) {
LOG_PRINTF("data too short, type=%d\n", hid_get_type(device_id));
return;
}
// 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("HID EVENT %02X %02X %02X %02X \n", data[0], data[1], data[2], data[3]);
/*
if (hid_get_type(device_id) == HID_TYPE_KEYBOARD) {
}
*/
}
static const hid_config_t hid_config = {
.hid_in_message_handler = &hid_in_message_handler
};
int main(void)
{
clock_setup();
gpio_setup();
/* provides time_curr_us to usbh_poll function */
tim6_setup();
usart_init(USART2, 1000000);
debug_usart_init();
LOG_PRINTF("SecureHID device side initializing");
hid_driver_init(&hid_config);
hub_driver_init();
/**
* 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 usbh_config.h - optimization for speed
*
* Pass array of supported device drivers
*/
usbh_init(lld_drivers, device_drivers);
LOG_PRINTF("USB init complete\n");
while (23) {
usbh_poll(tim6_get_time_us());
delay_ms_busy_loop(1); /* approx 1ms interval between usbh_poll() */
}
return 0;
}
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