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Diffstat (limited to 'examples/usbtmc/src/usb_descriptors.c')
| -rw-r--r-- | examples/usbtmc/src/usb_descriptors.c | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/examples/usbtmc/src/usb_descriptors.c b/examples/usbtmc/src/usb_descriptors.c new file mode 100644 index 0000000..5272f03 --- /dev/null +++ b/examples/usbtmc/src/usb_descriptors.c @@ -0,0 +1,242 @@ +/* + * The MIT License (MIT) + * + * Copyright (c) 2019 Ha Thach (tinyusb.org) + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + */ + +#include "tusb.h" +#include "class/usbtmc/usbtmc.h" +#include "class/usbtmc/usbtmc_device.h" + +/* A combination of interfaces must have a unique product id, since PC will save device driver after the first plug. + * Same VID/PID with different interface e.g MSC (first), then CDC (later) will possibly cause system error on PC. + * + * Auto ProductID layout's Bitmap: + * [MSB] HID | MSC | CDC [LSB] + */ +#define _PID_MAP(itf, n) ( (CFG_TUD_##itf) << (n) ) +#define USB_PID (0x4000 | _PID_MAP(CDC, 0) | _PID_MAP(MSC, 1) | _PID_MAP(HID, 2) | \ + _PID_MAP(MIDI, 3) | _PID_MAP(VENDOR, 4) ) + +#define USB_VID 0xCafe +#define USB_BCD 0x0200 + +//--------------------------------------------------------------------+ +// Device Descriptors +//--------------------------------------------------------------------+ +tusb_desc_device_t const desc_device = +{ + .bLength = sizeof(tusb_desc_device_t), + .bDescriptorType = TUSB_DESC_DEVICE, + .bcdUSB = 0x0200, + .bDeviceClass = 0x00, + .bDeviceSubClass = 0x00, + .bDeviceProtocol = 0x00, + + .bMaxPacketSize0 = CFG_TUD_ENDPOINT0_SIZE, + + .idVendor = USB_VID, + .idProduct = USB_PID, + .bcdDevice = USB_BCD, + + .iManufacturer = 0x01, + .iProduct = 0x02, + .iSerialNumber = 0x03, + + .bNumConfigurations = 0x01 +}; + +// Invoked when received GET DEVICE DESCRIPTOR +// Application return pointer to descriptor +uint8_t const * tud_descriptor_device_cb(void) +{ + return (uint8_t const *) &desc_device; +} + +//--------------------------------------------------------------------+ +// Configuration Descriptor +//--------------------------------------------------------------------+ + +#if defined(CFG_TUD_USBTMC) + +# define TUD_USBTMC_DESC_MAIN(_itfnum,_bNumEndpoints, _bulkMaxPacketLength) \ + TUD_USBTMC_IF_DESCRIPTOR(_itfnum, _bNumEndpoints, /*_stridx = */ 4u, TUD_USBTMC_PROTOCOL_USB488), \ + TUD_USBTMC_BULK_DESCRIPTORS(/* OUT = */0x01, /* IN = */ 0x81, /* packet size = */_bulkMaxPacketLength) + +#if CFG_TUD_USBTMC_ENABLE_INT_EP +// USBTMC Interrupt xfer always has length of 2, but we use epMaxSize=8 for +// compatibility with mcus that only allow 8, 16, 32 or 64 for FS endpoints +# define TUD_USBTMC_DESC(_itfnum, _bulkMaxPacketLength) \ + TUD_USBTMC_DESC_MAIN(_itfnum, /* _epCount = */ 3, _bulkMaxPacketLength), \ + TUD_USBTMC_INT_DESCRIPTOR(/* INT ep # */ 0x82, /* epMaxSize = */ 8, /* bInterval = */16u ) +# define TUD_USBTMC_DESC_LEN (TUD_USBTMC_IF_DESCRIPTOR_LEN + TUD_USBTMC_BULK_DESCRIPTORS_LEN + TUD_USBTMC_INT_DESCRIPTOR_LEN) + +#else + +# define TUD_USBTMC_DESC(_itfnum, _bulkMaxPacketLength) \ + TUD_USBTMC_DESC_MAIN(_itfnum, /* _epCount = */ 2u, _bulkMaxPacketLength) +# define TUD_USBTMC_DESC_LEN (TUD_USBTMC_IF_DESCRIPTOR_LEN + TUD_USBTMC_BULK_DESCRIPTORS_LEN) + +#endif /* CFG_TUD_USBTMC_ENABLE_INT_EP */ + +#else +# define USBTMC_DESC_LEN (0) +#endif /* CFG_TUD_USBTMC */ + +enum +{ + ITF_NUM_USBTMC, + ITF_NUM_TOTAL +}; + + +#define CONFIG_TOTAL_LEN (TUD_CONFIG_DESC_LEN + TUD_USBTMC_DESC_LEN) + +#if CFG_TUSB_MCU == OPT_MCU_LPC175X_6X || CFG_TUSB_MCU == OPT_MCU_LPC177X_8X || CFG_TUSB_MCU == OPT_MCU_LPC40XX + // LPC 17xx and 40xx endpoint type (bulk/interrupt/iso) are fixed by its number + // 0 control, 1 In, 2 Bulk, 3 Iso, 4 In etc ... + // Note: since CDC EP ( 1 & 2), HID (4) are spot-on, thus we only need to force + // endpoint number for MSC to 5 + #define EPNUM_MSC 0x05 +#else + #define EPNUM_MSC 0x03 +#endif + + +uint8_t const desc_fs_configuration[] = +{ + // Config number, interface count, string index, total length, attribute, power in mA + TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, 0x00, 100), + + TUD_USBTMC_DESC(ITF_NUM_USBTMC, /* _bulkMaxPacketLength = */ 64), +}; + +#if TUD_OPT_HIGH_SPEED + +uint8_t const desc_hs_configuration[] = +{ + // Config number, interface count, string index, total length, attribute, power in mA + TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, 0x00, 100), + + TUD_USBTMC_DESC(ITF_NUM_USBTMC, /* _bulkMaxPacketLength = */ 512), +}; + +// other speed configuration +uint8_t desc_other_speed_config[CONFIG_TOTAL_LEN]; + +// device qualifier is mostly similar to device descriptor since we don't change configuration based on speed +tusb_desc_device_qualifier_t const desc_device_qualifier = +{ + .bLength = sizeof(tusb_desc_device_qualifier_t), + .bDescriptorType = TUSB_DESC_DEVICE_QUALIFIER, + .bcdUSB = USB_BCD, + + .bDeviceClass = 0x00, + .bDeviceSubClass = 0x00, + .bDeviceProtocol = 0x00, + + .bMaxPacketSize0 = CFG_TUD_ENDPOINT0_SIZE, + .bNumConfigurations = 0x01, + .bReserved = 0x00 +}; + +// Invoked when received GET DEVICE QUALIFIER DESCRIPTOR request +// Application return pointer to descriptor, whose contents must exist long enough for transfer to complete. +// device_qualifier descriptor describes information about a high-speed capable device that would +// change if the device were operating at the other speed. If not highspeed capable stall this request. +uint8_t const* tud_descriptor_device_qualifier_cb(void) +{ + return (uint8_t const*) &desc_device_qualifier; +} + +#endif + +// Invoked when received GET CONFIGURATION DESCRIPTOR +// Application return pointer to descriptor +// Descriptor contents must exist long enough for transfer to complete +uint8_t const * tud_descriptor_configuration_cb(uint8_t index) +{ + (void) index; // for multiple configurations +#if TUD_OPT_HIGH_SPEED + // Although we are highspeed, host may be fullspeed. + return (tud_speed_get() == TUSB_SPEED_HIGH) ? desc_hs_configuration : desc_fs_configuration; +#else + return desc_fs_configuration; +#endif +} + +//--------------------------------------------------------------------+ +// String Descriptors +//--------------------------------------------------------------------+ + +// array of pointer to string descriptors +char const* string_desc_arr [] = +{ + (const char[]) { 0x09, 0x04 }, // 0: is supported language is English (0x0409) + "EsPiFF-USBTMC", // 1: Manufacturer + "EsPiFF HAT-Instrument", // 2: Product + "123456", // 3: Serials, should use chip ID + "TinyUSB USBTMC", // 4: USBTMC +}; + +static uint16_t _desc_str[32]; + +// Invoked when received GET STRING DESCRIPTOR request +// Application return pointer to descriptor, whose contents must exist long enough for transfer to complete +uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid) +{ + (void) langid; + + size_t chr_count; + + if ( index == 0) + { + memcpy(&_desc_str[1], string_desc_arr[0], 2); + chr_count = 1; + } + else + { + // Note: the 0xEE index string is a Microsoft OS 1.0 Descriptors. + // https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/microsoft-defined-usb-descriptors + + if ( !(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0])) ) return NULL; + + const char* str = string_desc_arr[index]; + + // Cap at max char + chr_count = (uint8_t) strlen(str); + if ( chr_count > 31 ) { + chr_count = 31; + } + + // Convert ASCII string into UTF-16 + for(uint8_t i=0; i<chr_count; i++) + { + _desc_str[1+i] = str[i]; + } + } + + // first byte is length (including header), second byte is string type + _desc_str[0] = (uint16_t)((((uint16_t)TUSB_DESC_STRING) << 8 ) | (2u*chr_count + 2u)); + + return _desc_str; +} |