mirror of
https://bitbucket.org/librepilot/librepilot.git
synced 2024-12-10 18:24:11 +01:00
242 lines
6.1 KiB
C
242 lines
6.1 KiB
C
/**
|
|
******************************************************************************
|
|
* @addtogroup PIOS PIOS Core hardware abstraction layer
|
|
* @{
|
|
* @addtogroup PIOS_USB USB Setup Functions
|
|
* @brief PIOS USB device implementation
|
|
* @{
|
|
*
|
|
* @file pios_usb.c
|
|
* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
|
|
* @brief USB device functions (STM32 dependent code)
|
|
* @see The GNU Public License (GPL) Version 3
|
|
*
|
|
*****************************************************************************/
|
|
/*
|
|
* 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, write to the Free Software Foundation, Inc.,
|
|
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
/* Project Includes */
|
|
#include "pios.h"
|
|
#include "usb_lib.h"
|
|
#include "pios_usb_board_data.h"
|
|
#include "stm32f10x.h"
|
|
|
|
#include "pios_usb.h"
|
|
#include "pios_usb_priv.h"
|
|
|
|
#if defined(PIOS_INCLUDE_USB_HID)
|
|
|
|
/* Rx/Tx status */
|
|
static bool transfer_possible = false;
|
|
|
|
enum pios_usb_dev_magic {
|
|
PIOS_USB_DEV_MAGIC = 0x17365904,
|
|
};
|
|
|
|
struct pios_usb_dev {
|
|
enum pios_usb_dev_magic magic;
|
|
const struct pios_usb_cfg * cfg;
|
|
};
|
|
|
|
/**
|
|
* @brief Validate the usb device structure
|
|
* @returns 0 if valid device or -1 otherwise
|
|
*/
|
|
static int32_t PIOS_USB_validate(struct pios_usb_dev * usb_dev)
|
|
{
|
|
if(usb_dev == NULL)
|
|
return -1;
|
|
|
|
if (usb_dev->magic != PIOS_USB_DEV_MAGIC)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if defined(PIOS_INCLUDE_FREERTOS)
|
|
static struct pios_usb_dev * PIOS_USB_alloc(void)
|
|
{
|
|
struct pios_usb_dev * usb_dev;
|
|
|
|
usb_dev = (struct pios_usb_dev *)pvPortMalloc(sizeof(*usb_dev));
|
|
if (!usb_dev) return(NULL);
|
|
|
|
usb_dev->magic = PIOS_USB_DEV_MAGIC;
|
|
return(usb_dev);
|
|
}
|
|
#else
|
|
static struct pios_usb_dev pios_usb_devs[PIOS_USB_MAX_DEVS];
|
|
static uint8_t pios_usb_num_devs;
|
|
static struct pios_usb_dev * PIOS_USB_alloc(void)
|
|
{
|
|
struct pios_usb_dev * usb_dev;
|
|
|
|
if (pios_usb_num_devs >= PIOS_USB_MAX_DEVS) {
|
|
return (NULL);
|
|
}
|
|
|
|
usb_dev = &pios_usb_devs[pios_usb_num_devs++];
|
|
usb_dev->magic = PIOS_USB_DEV_MAGIC;
|
|
|
|
return (usb_dev);
|
|
}
|
|
#endif
|
|
|
|
|
|
/**
|
|
* Initialises USB COM layer
|
|
* \return < 0 if initialisation failed
|
|
* \note Applications shouldn't call this function directly, instead please use \ref PIOS_COM layer functions
|
|
*/
|
|
static uint32_t pios_usb_com_id;
|
|
int32_t PIOS_USB_Init(uint32_t * usb_id, const struct pios_usb_cfg * cfg)
|
|
{
|
|
PIOS_Assert(usb_id);
|
|
PIOS_Assert(cfg);
|
|
|
|
struct pios_usb_dev * usb_dev;
|
|
|
|
usb_dev = (struct pios_usb_dev *) PIOS_USB_alloc();
|
|
if (!usb_dev) goto out_fail;
|
|
|
|
/* Bind the configuration to the device instance */
|
|
usb_dev->cfg = cfg;
|
|
|
|
PIOS_USB_Reenumerate();
|
|
|
|
/*
|
|
* This is a horrible hack to make this available to
|
|
* the interrupt callbacks. This should go away ASAP.
|
|
*/
|
|
pios_usb_com_id = (uint32_t) usb_dev;
|
|
|
|
/* Enable the USB Interrupts */
|
|
NVIC_Init(&usb_dev->cfg->irq.init);
|
|
|
|
/* Select USBCLK source */
|
|
RCC_USBCLKConfig(RCC_USBCLKSource_PLLCLK_1Div5);
|
|
/* Enable the USB clock */
|
|
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USB, ENABLE);
|
|
|
|
USB_Init();
|
|
USB_SIL_Init();
|
|
|
|
*usb_id = (uint32_t) usb_dev;
|
|
|
|
return 0; /* No error */
|
|
|
|
out_fail:
|
|
return(-1);
|
|
}
|
|
|
|
/**
|
|
* This function is called by the USB driver on cable connection/disconnection
|
|
* \param[in] connected connection status (1 if connected)
|
|
* \return < 0 on errors
|
|
* \note Applications shouldn't call this function directly, instead please use \ref PIOS_COM layer functions
|
|
*/
|
|
int32_t PIOS_USB_ChangeConnectionState(bool Connected)
|
|
{
|
|
// In all cases: re-initialise USB HID driver
|
|
if (Connected) {
|
|
transfer_possible = true;
|
|
|
|
//TODO: Check SetEPRxValid(ENDP1);
|
|
|
|
#if defined(USB_LED_ON)
|
|
USB_LED_ON; // turn the USB led on
|
|
#endif
|
|
} else {
|
|
// Cable disconnected: disable transfers
|
|
transfer_possible = false;
|
|
|
|
#if defined(USB_LED_OFF)
|
|
USB_LED_OFF; // turn the USB led off
|
|
#endif
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int32_t PIOS_USB_Reenumerate()
|
|
{
|
|
/* Force USB reset and power-down (this will also release the USB pins for direct GPIO control) */
|
|
_SetCNTR(CNTR_FRES | CNTR_PDWN);
|
|
|
|
/* Using a "dirty" method to force a re-enumeration: */
|
|
/* Force DPM (Pin PA12) low for ca. 10 mS before USB Tranceiver will be enabled */
|
|
/* This overrules the external Pull-Up at PA12, and at least Windows & MacOS will enumerate again */
|
|
GPIO_InitTypeDef GPIO_InitStructure;
|
|
GPIO_StructInit(&GPIO_InitStructure);
|
|
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
|
|
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
|
|
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
|
|
GPIO_Init(GPIOA, &GPIO_InitStructure);
|
|
|
|
PIOS_DELAY_WaitmS(50);
|
|
|
|
/* Release power-down, still hold reset */
|
|
_SetCNTR(CNTR_PDWN);
|
|
PIOS_DELAY_WaituS(5);
|
|
|
|
/* CNTR_FRES = 0 */
|
|
_SetCNTR(0);
|
|
|
|
/* Clear pending interrupts */
|
|
_SetISTR(0);
|
|
|
|
/* Configure USB clock */
|
|
/* USBCLK = PLLCLK / 1.5 */
|
|
RCC_USBCLKConfig(RCC_USBCLKSource_PLLCLK_1Div5);
|
|
/* Enable USB clock */
|
|
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USB, ENABLE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool PIOS_USB_CableConnected(uint8_t id)
|
|
{
|
|
struct pios_usb_dev * usb_dev = (struct pios_usb_dev *) pios_usb_com_id;
|
|
|
|
if (PIOS_USB_validate(usb_dev) != 0)
|
|
return false;
|
|
|
|
return usb_dev->cfg->vsense.gpio->IDR & usb_dev->cfg->vsense.init.GPIO_Pin;
|
|
}
|
|
|
|
/**
|
|
* This function returns the connection status of the USB HID interface
|
|
* \return 1: interface available
|
|
* \return 0: interface not available
|
|
* \note Applications shouldn't call this function directly, instead please use \ref PIOS_COM layer functions
|
|
*/
|
|
bool PIOS_USB_CheckAvailable(uint32_t id)
|
|
{
|
|
struct pios_usb_dev * usb_dev = (struct pios_usb_dev *) pios_usb_com_id;
|
|
|
|
if (PIOS_USB_validate(usb_dev) != 0)
|
|
return false;
|
|
|
|
return PIOS_USB_CableConnected(id) && transfer_possible;
|
|
}
|
|
|
|
#endif
|
|
|
|
/**
|
|
* @}
|
|
* @}
|
|
*/
|