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micropython/ports/stm32/usbd_desc.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*/
/**
******************************************************************************
* @file USB_Device/CDC_Standalone/Src/usbd_desc.c
* @author MCD Application Team
* @version V1.0.1
* @date 26-February-2014
* @brief This file provides the USBD descriptors and string formating method.
******************************************************************************
* @attention
*
* <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
*
* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.st.com/software_license_agreement_liberty_v2
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************
*/
#include "usbd_core.h"
#include "usbd_desc.h"
#include "usbd_conf.h"
// need these headers just for MP_HAL_UNIQUE_ID_ADDRESS
#include "py/misc.h"
#include "py/mphal.h"
// So we don't clash with existing ST boards, we use the unofficial FOSS VID.
// This needs a proper solution.
#define USBD_VID 0xf055
#define USBD_PID 0x9800
#define USBD_LANGID_STRING 0x409
#define USBD_MANUFACTURER_STRING "MicroPython"
#define USBD_PRODUCT_HS_STRING "Pyboard Virtual Comm Port in HS Mode"
#define USBD_PRODUCT_FS_STRING "Pyboard Virtual Comm Port in FS Mode"
#define USBD_CONFIGURATION_HS_STRING "Pyboard Config"
#define USBD_INTERFACE_HS_STRING "Pyboard Interface"
#define USBD_CONFIGURATION_FS_STRING "Pyboard Config"
#define USBD_INTERFACE_FS_STRING "Pyboard Interface"
// USB Standard Device Descriptor
// needs to be in RAM because we modify the VID and PID
__ALIGN_BEGIN static uint8_t hUSBDDeviceDesc[USB_LEN_DEV_DESC] __ALIGN_END = {
0x12, // bLength
USB_DESC_TYPE_DEVICE, // bDescriptorType
0x00, // bcdUSB
0x02,
0xef, // bDeviceClass: Miscellaneous Device Class
0x02, // bDeviceSubClass: Common Class
0x01, // bDeviceProtocol: Interface Association Descriptor
USB_MAX_EP0_SIZE, // bMaxPacketSize
LOBYTE(USBD_VID), // idVendor
HIBYTE(USBD_VID), // idVendor
LOBYTE(USBD_PID), // idVendor
HIBYTE(USBD_PID), // idVendor
0x00, // bcdDevice rel. 2.00
0x02,
USBD_IDX_MFC_STR, // Index of manufacturer string
USBD_IDX_PRODUCT_STR, // Index of product string
USBD_IDX_SERIAL_STR, // Index of serial number string
USBD_MAX_NUM_CONFIGURATION // bNumConfigurations
};
__ALIGN_BEGIN static uint8_t USBD_LangIDDesc[USB_LEN_LANGID_STR_DESC] __ALIGN_END = {
USB_LEN_LANGID_STR_DESC,
USB_DESC_TYPE_STRING,
LOBYTE(USBD_LANGID_STRING),
HIBYTE(USBD_LANGID_STRING),
};
__ALIGN_BEGIN static uint8_t USBD_StrDesc[USBD_MAX_STR_DESC_SIZ] __ALIGN_END;
// set the VID, PID and device release number
void USBD_SetVIDPIDRelease(uint16_t vid, uint16_t pid, uint16_t device_release_num, int cdc_only) {
if (cdc_only) {
// Make it look like a Communications device if we're only
// using CDC. Otherwise, windows gets confused when we tell it that
// its a composite device with only a cdc serial interface.
hUSBDDeviceDesc[4] = 0x02;
hUSBDDeviceDesc[5] = 0x00;
hUSBDDeviceDesc[6] = 0x00;
} else {
// For the other modes, we make this look like a composite device.
hUSBDDeviceDesc[4] = 0xef;
hUSBDDeviceDesc[5] = 0x02;
hUSBDDeviceDesc[6] = 0x01;
}
hUSBDDeviceDesc[8] = LOBYTE(vid);
hUSBDDeviceDesc[9] = HIBYTE(vid);
hUSBDDeviceDesc[10] = LOBYTE(pid);
hUSBDDeviceDesc[11] = HIBYTE(pid);
hUSBDDeviceDesc[12] = LOBYTE(device_release_num);
hUSBDDeviceDesc[13] = HIBYTE(device_release_num);
}
/**
* @brief Returns the device descriptor.
* @param speed: Current device speed
* @param length: Pointer to data length variable
* @retval Pointer to descriptor buffer
*/
STATIC uint8_t *USBD_DeviceDescriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
*length = sizeof(hUSBDDeviceDesc);
return hUSBDDeviceDesc;
}
/**
* @brief Returns the LangID string descriptor.
* @param speed: Current device speed
* @param length: Pointer to data length variable
* @retval Pointer to descriptor buffer
*/
STATIC uint8_t *USBD_LangIDStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
*length = sizeof(USBD_LangIDDesc);
return USBD_LangIDDesc;
}
/**
* @brief Returns the product string descriptor.
* @param speed: Current device speed
* @param length: Pointer to data length variable
* @retval Pointer to descriptor buffer
*/
STATIC uint8_t *USBD_ProductStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
if(speed == 0) {
USBD_GetString((uint8_t *)USBD_PRODUCT_HS_STRING, USBD_StrDesc, length);
} else {
USBD_GetString((uint8_t *)USBD_PRODUCT_FS_STRING, USBD_StrDesc, length);
}
return USBD_StrDesc;
}
/**
* @brief Returns the manufacturer string descriptor.
* @param speed: Current device speed
* @param length: Pointer to data length variable
* @retval Pointer to descriptor buffer
*/
STATIC uint8_t *USBD_ManufacturerStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
USBD_GetString((uint8_t *)USBD_MANUFACTURER_STRING, USBD_StrDesc, length);
return USBD_StrDesc;
}
/**
* @brief Returns the serial number string descriptor.
* @param speed: Current device speed
* @param length: Pointer to data length variable
* @retval Pointer to descriptor buffer
*/
STATIC uint8_t *USBD_SerialStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
// This document: http://www.usb.org/developers/docs/devclass_docs/usbmassbulk_10.pdf
// says that the serial number has to be at least 12 digits long and that
// the last 12 digits need to be unique. It also stipulates that the valid
// character set is that of upper-case hexadecimal digits.
//
// The onboard DFU bootloader produces a 12-digit serial number based on
// the 96-bit unique ID, so for consistency we go with this algorithm.
// You can see the serial number if you do:
//
// dfu-util -l
//
// See: https://my.st.com/52d187b7 for the algorithim used.
uint8_t *id = (uint8_t *)MP_HAL_UNIQUE_ID_ADDRESS;
char serial_buf[16];
snprintf(serial_buf, sizeof(serial_buf),
"%02X%02X%02X%02X%02X%02X",
id[11], id[10] + id[2], id[9], id[8] + id[0], id[7], id[6]);
USBD_GetString((uint8_t *)serial_buf, USBD_StrDesc, length);
return USBD_StrDesc;
}
/**
* @brief Returns the configuration string descriptor.
* @param speed: Current device speed
* @param length: Pointer to data length variable
* @retval Pointer to descriptor buffer
*/
STATIC uint8_t *USBD_ConfigStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
if(speed == USBD_SPEED_HIGH) {
USBD_GetString((uint8_t *)USBD_CONFIGURATION_HS_STRING, USBD_StrDesc, length);
} else {
USBD_GetString((uint8_t *)USBD_CONFIGURATION_FS_STRING, USBD_StrDesc, length);
}
return USBD_StrDesc;
}
/**
* @brief Returns the interface string descriptor.
* @param speed: Current device speed
* @param length: Pointer to data length variable
* @retval Pointer to descriptor buffer
*/
STATIC uint8_t *USBD_InterfaceStrDescriptor(USBD_SpeedTypeDef speed, uint16_t *length) {
if(speed == 0) {
USBD_GetString((uint8_t *)USBD_INTERFACE_HS_STRING, USBD_StrDesc, length);
} else {
USBD_GetString((uint8_t *)USBD_INTERFACE_FS_STRING, USBD_StrDesc, length);
}
return USBD_StrDesc;
}
const USBD_DescriptorsTypeDef USBD_Descriptors = {
USBD_DeviceDescriptor,
USBD_LangIDStrDescriptor,
USBD_ManufacturerStrDescriptor,
USBD_ProductStrDescriptor,
USBD_SerialStrDescriptor,
USBD_ConfigStrDescriptor,
USBD_InterfaceStrDescriptor,
};
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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