Initial PIC32 driver -- now is just a badly hacked STM32 USB driver
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4234 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
parent
c36e5a6fce
commit
a55c1ad388
136
configs/sure-pic32mx/src/up_usbdev.c
Normal file
136
configs/sure-pic32mx/src/up_usbdev.c
Normal file
@ -0,0 +1,136 @@
|
||||
/************************************************************************************
|
||||
* configs/sure-pic32mx/src/up_usbdev.c
|
||||
* arch/arm/src/board/up_usbdev.c
|
||||
*
|
||||
* Copyright (C) 2011 Gregory Nutt. All rights reserved.
|
||||
* Author: Gregory Nutt <gnutt@nuttx.org>
|
||||
*
|
||||
* References:
|
||||
* - Sample code and schematics provided with the Sure Electronics PIC32 board.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
************************************************************************************/
|
||||
|
||||
/************************************************************************************
|
||||
* Included Files
|
||||
************************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
|
||||
#include <stdint.h>
|
||||
#include <stdbool.h>
|
||||
#include <debug.h>
|
||||
|
||||
#include <nuttx/spi.h>
|
||||
#include <arch/board/board.h>
|
||||
|
||||
#include "up_arch.h"
|
||||
#include "chip.h"
|
||||
#include "pic32mx-internal.h"
|
||||
#include "sure-internal.h"
|
||||
|
||||
#if defined(CONFIG_PIC32MX_USBDEV)
|
||||
|
||||
/************************************************************************************
|
||||
* Definitions
|
||||
************************************************************************************/
|
||||
/*
|
||||
* PIN NAME SIGNAL NOTES
|
||||
* ---- ------------------------------- -------------- ------------------------------
|
||||
* 11 AN5/C1IN+/Vbuson/CN7/RB5 Vbuson/AN5/RB5 To USB VBUS circuitry
|
||||
* 43 U1CTS/SDA1/IC2/INT2/RD9 USB_OPTEN USB PHY
|
||||
* 44 SCL1/IC3/PMCS2/PMA15/INT3/RD10 USB_OPT USB PHY
|
||||
*/
|
||||
|
||||
#define GPIO_USB_VBUSON (GPIO_INPUT|GPIO_PORTB|GPIO_PIN5)
|
||||
#define GPIO_USB_OPTEN (GPIO_OUTPUT|GPIO_VALUE_ZERO|GPIO_PORTD|GPIO_PIN9)
|
||||
#define GPIO_USB_OPT (GPIO_OUTPUT|GPIO_VALUE_ONE|GPIO_PORTD|GPIO_PIN10)
|
||||
|
||||
/************************************************************************************
|
||||
* Private Functions
|
||||
************************************************************************************/
|
||||
|
||||
/************************************************************************************
|
||||
* Public Functions
|
||||
************************************************************************************/
|
||||
|
||||
/************************************************************************************
|
||||
* Name: pic32mx_usbdevinitialize
|
||||
*
|
||||
* Description:
|
||||
* Called to configure the mini-B PHY on the Sure PIC32MX board for the USB device
|
||||
*
|
||||
************************************************************************************/
|
||||
|
||||
void weak_function pic32mx_usbdevinitialize(void)
|
||||
{
|
||||
/* Connect the PHY to the USB mini-B port. Order and timing matter! */
|
||||
|
||||
pic32mx_configgpio(GPIO_USB_OPTEN);
|
||||
pic32mx_configgpio(GPIO_USB_OPT);
|
||||
|
||||
/* Notes from the Sure Electronics sample code:
|
||||
*
|
||||
* "The USB specifications require that USB peripheral devices must never source
|
||||
* current onto the Vbus pin. Additionally, USB peripherals should not source
|
||||
* current on D+ or D- when the host/hub is not actively powering the Vbus line.
|
||||
* When designing a self powered (as opposed to bus powered) USB peripheral
|
||||
* device, the firmware should make sure not to turn on the USB module and D+
|
||||
* or D- pull up resistor unless Vbus is actively powered. Therefore, the
|
||||
* firmware needs some means to detect when Vbus is being powered by the host.
|
||||
* A 5V tolerant I/O pin can be connected to Vbus (through a resistor), and
|
||||
* can be used to detect when Vbus is high (host actively powering), or low
|
||||
* (host is shut down or otherwise not supplying power). The USB firmware
|
||||
* can then periodically poll this I/O pin to know when it is okay to turn on
|
||||
* the USB module/D+/D- pull up resistor. When designing a purely bus powered
|
||||
* peripheral device, it is not possible to source current on D+ or D- when the
|
||||
* host is not actively providing power on Vbus. Therefore, implementing this
|
||||
* bus sense feature is optional. ..."
|
||||
*/
|
||||
|
||||
#ifdef CONFIG_USBHOST
|
||||
// pic32mx_configgpio(GPIO_USB_VBUSON);
|
||||
#endif
|
||||
|
||||
/* "If the host PC sends a GetStatus (device) request, the firmware must respond
|
||||
* and let the host know if the USB peripheral device is currently bus powered
|
||||
* or self powered. See chapter 9 in the official USB specifications for details
|
||||
* regarding this request. If the peripheral device is capable of being both
|
||||
* self and bus powered, it should not return a hard coded value for this request.
|
||||
* Instead, firmware should check if it is currently self or bus powered, and
|
||||
* respond accordingly. If the hardware has been configured like demonstrated
|
||||
* on the PICDEM FS USB Demo Board, an I/O pin can be polled to determine the
|
||||
* currently selected power source. ..."
|
||||
*/
|
||||
|
||||
#ifdef CONFIG_USB_PWRSENSE
|
||||
// pic32mx_configgpio(GPIO_USB_PWRSENSE);
|
||||
#endif
|
||||
}
|
||||
#endif /* CONFIG_PIC32MX_USBDEV */
|
||||
Loading…
Reference in New Issue
Block a user