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583472e068
There's no need to have these as separate functions, they just take up unnecessary code space and combining them allows to factor common code, and also allows to support arbitrary string descriptor indices.
185 lines
7.1 KiB
C
185 lines
7.1 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*/
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/**
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******************************************************************************
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* @file USB_Device/CDC_Standalone/Src/usbd_desc.c
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* @author MCD Application Team
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* @version V1.0.1
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* @date 26-February-2014
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* @brief This file provides the USBD descriptors and string formating method.
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
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*
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* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
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* You may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.st.com/software_license_agreement_liberty_v2
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************
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*/
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#include "usbd_core.h"
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#include "usbd_desc.h"
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#include "usbd_conf.h"
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// need this header just for MP_HAL_UNIQUE_ID_ADDRESS
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#include "py/mphal.h"
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// So we don't clash with existing ST boards, we use the unofficial FOSS VID.
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// This needs a proper solution.
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#define USBD_VID 0xf055
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#define USBD_PID 0x9800
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#define USBD_LANGID_STRING 0x409
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#define USBD_MANUFACTURER_STRING "MicroPython"
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#define USBD_PRODUCT_HS_STRING "Pyboard Virtual Comm Port in HS Mode"
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#define USBD_PRODUCT_FS_STRING "Pyboard Virtual Comm Port in FS Mode"
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#define USBD_CONFIGURATION_HS_STRING "Pyboard Config"
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#define USBD_INTERFACE_HS_STRING "Pyboard Interface"
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#define USBD_CONFIGURATION_FS_STRING "Pyboard Config"
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#define USBD_INTERFACE_FS_STRING "Pyboard Interface"
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__ALIGN_BEGIN static const uint8_t USBD_LangIDDesc[USB_LEN_LANGID_STR_DESC] __ALIGN_END = {
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USB_LEN_LANGID_STR_DESC,
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USB_DESC_TYPE_STRING,
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LOBYTE(USBD_LANGID_STRING),
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HIBYTE(USBD_LANGID_STRING),
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};
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// set the VID, PID and device release number
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void USBD_SetVIDPIDRelease(usbd_cdc_msc_hid_state_t *usbd, uint16_t vid, uint16_t pid, uint16_t device_release_num, int cdc_only) {
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uint8_t *dev_desc = &usbd->usbd_device_desc[0];
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dev_desc[0] = USB_LEN_DEV_DESC; // bLength
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dev_desc[1] = USB_DESC_TYPE_DEVICE; // bDescriptorType
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dev_desc[2] = 0x00; // bcdUSB
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dev_desc[3] = 0x02; // bcdUSB
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if (cdc_only) {
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// Make it look like a Communications device if we're only
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// using CDC. Otherwise, windows gets confused when we tell it that
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// its a composite device with only a cdc serial interface.
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dev_desc[4] = 0x02; // bDeviceClass
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dev_desc[5] = 0x00; // bDeviceSubClass
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dev_desc[6] = 0x00; // bDeviceProtocol
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} else {
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// For the other modes, we make this look like a composite device.
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dev_desc[4] = 0xef; // bDeviceClass: Miscellaneous Device Class
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dev_desc[5] = 0x02; // bDeviceSubClass: Common Class
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dev_desc[6] = 0x01; // bDeviceProtocol: Interface Association Descriptor
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}
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dev_desc[7] = USB_MAX_EP0_SIZE; // bMaxPacketSize
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dev_desc[8] = LOBYTE(vid); // idVendor
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dev_desc[9] = HIBYTE(vid); // idVendor
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dev_desc[10] = LOBYTE(pid); // idVendor
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dev_desc[11] = HIBYTE(pid); // idVendor
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dev_desc[12] = LOBYTE(device_release_num); // bcdDevice
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dev_desc[13] = HIBYTE(device_release_num); // bcdDevice
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dev_desc[14] = USBD_IDX_MFC_STR; // Index of manufacturer string
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dev_desc[15] = USBD_IDX_PRODUCT_STR; // Index of product string
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dev_desc[16] = USBD_IDX_SERIAL_STR; // Index of serial number string
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dev_desc[17] = USBD_MAX_NUM_CONFIGURATION; // bNumConfigurations
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}
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/**
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* @brief Returns the device descriptor.
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* @param speed: Current device speed
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* @param length: Pointer to data length variable
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* @retval Pointer to descriptor buffer
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*/
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STATIC uint8_t *USBD_DeviceDescriptor(USBD_HandleTypeDef *pdev, uint16_t *length) {
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uint8_t *dev_desc = ((usbd_cdc_msc_hid_state_t*)pdev->pClassData)->usbd_device_desc;
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*length = USB_LEN_DEV_DESC;
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return dev_desc;
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}
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/**
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* @brief Returns a string descriptor
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* @param idx: Index of the string descriptor to retrieve
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* @param length: Pointer to data length variable
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* @retval Pointer to descriptor buffer, or NULL if idx is invalid
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*/
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STATIC uint8_t *USBD_StrDescriptor(USBD_HandleTypeDef *pdev, uint8_t idx, uint16_t *length) {
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char str_buf[16];
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const char *str = NULL;
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switch (idx) {
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case USBD_IDX_LANGID_STR:
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*length = sizeof(USBD_LangIDDesc);
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return (uint8_t*)USBD_LangIDDesc; // the data should only be read from this buf
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case USBD_IDX_MFC_STR:
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str = USBD_MANUFACTURER_STRING;
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break;
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case USBD_IDX_PRODUCT_STR:
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if (pdev->dev_speed == USBD_SPEED_HIGH) {
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str = USBD_PRODUCT_HS_STRING;
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} else {
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str = USBD_PRODUCT_FS_STRING;
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}
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break;
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case USBD_IDX_SERIAL_STR: {
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// This document: http://www.usb.org/developers/docs/devclass_docs/usbmassbulk_10.pdf
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// says that the serial number has to be at least 12 digits long and that
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// the last 12 digits need to be unique. It also stipulates that the valid
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// character set is that of upper-case hexadecimal digits.
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//
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// The onboard DFU bootloader produces a 12-digit serial number based on
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// the 96-bit unique ID, so for consistency we go with this algorithm.
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// You can see the serial number if you use: lsusb -v
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//
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// See: https://my.st.com/52d187b7 for the algorithim used.
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uint8_t *id = (uint8_t *)MP_HAL_UNIQUE_ID_ADDRESS;
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snprintf(str_buf, sizeof(str_buf),
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"%02X%02X%02X%02X%02X%02X",
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id[11], id[10] + id[2], id[9], id[8] + id[0], id[7], id[6]);
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str = str_buf;
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break;
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}
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case USBD_IDX_CONFIG_STR:
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if (pdev->dev_speed == USBD_SPEED_HIGH) {
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str = USBD_CONFIGURATION_HS_STRING;
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} else {
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str = USBD_CONFIGURATION_FS_STRING;
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}
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break;
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case USBD_IDX_INTERFACE_STR:
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if (pdev->dev_speed == USBD_SPEED_HIGH) {
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str = USBD_INTERFACE_HS_STRING;
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} else {
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str = USBD_INTERFACE_FS_STRING;
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}
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break;
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default:
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// invalid string index
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return NULL;
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}
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uint8_t *str_desc = ((usbd_cdc_msc_hid_state_t*)pdev->pClassData)->usbd_str_desc;
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USBD_GetString((uint8_t*)str, str_desc, length);
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return str_desc;
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}
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const USBD_DescriptorsTypeDef USBD_Descriptors = {
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USBD_DeviceDescriptor,
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USBD_StrDescriptor,
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};
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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