368 lines
13 KiB
C
368 lines
13 KiB
C
/*
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Copyright (C) 2015 Robert Lippert
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Licensed under the Apache License, Version 2.0 (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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http://www.apache.org/licenses/LICENSE-2.0
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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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#include "ch.h"
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#include "hal.h"
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#include "usbcfg.h"
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/* Endpoints to be used. */
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#define USBD_DATA_REQUEST_EP 1
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#define USBD_DATA_AVAILABLE_EP 3
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#define USBD_INTERRUPT_REQUEST_EP 2
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#if (AVR_USB_USE_NAMED_ADDRESS_SPACES == TRUE) && defined(__FLASH)
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# undef ROMCONST
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# define ROMCONST const __flash
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#endif
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/* Virtual serial port over USB.*/
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SerialUSBDriver SDU1;
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/*
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* USB Device Descriptor.
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*/
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static ROMCONST uint8_t vcom_device_descriptor_data[18] = {
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USB_DESC_DEVICE (0x0110, /* bcdUSB (1.1). */
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0x02, /* bDeviceClass (CDC). */
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0x00, /* bDeviceSubClass. */
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0x00, /* bDeviceProtocol. */
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0x40, /* bMaxPacketSize. */
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0x0483, /* idVendor (ST). */
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0x5740, /* idProduct. */
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0x0200, /* bcdDevice. */
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1, /* iManufacturer. */
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2, /* iProduct. */
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3, /* iSerialNumber. */
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1) /* bNumConfigurations. */
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};
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/* Configuration Descriptor tree for a CDC.*/
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static ROMCONST uint8_t vcom_configuration_descriptor_data[67] = {
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/* Configuration Descriptor.*/
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USB_DESC_CONFIGURATION(67, /* wTotalLength. */
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0x02, /* bNumInterfaces. */
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0x01, /* bConfigurationValue. */
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0, /* iConfiguration. */
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0xC0, /* bmAttributes (self powered). */
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50), /* bMaxPower (100mA). */
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/* Interface Descriptor.*/
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USB_DESC_INTERFACE (0x00, /* bInterfaceNumber. */
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0x00, /* bAlternateSetting. */
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0x01, /* bNumEndpoints. */
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0x02, /* bInterfaceClass (Communications
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Interface Class, CDC section
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4.2). */
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0x02, /* bInterfaceSubClass (Abstract
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Control Model, CDC section 4.3). */
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0x01, /* bInterfaceProtocol (AT commands,
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CDC section 4.4). */
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0), /* iInterface. */
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/* Header Functional Descriptor (CDC section 5.2.3).*/
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USB_DESC_BYTE (5), /* bLength. */
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USB_DESC_BYTE (0x24), /* bDescriptorType (CS_INTERFACE). */
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USB_DESC_BYTE (0x00), /* bDescriptorSubtype (Header
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Functional Descriptor. */
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USB_DESC_BCD (0x0110), /* bcdCDC. */
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/* Call Management Functional Descriptor. */
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USB_DESC_BYTE (5), /* bFunctionLength. */
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USB_DESC_BYTE (0x24), /* bDescriptorType (CS_INTERFACE). */
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USB_DESC_BYTE (0x01), /* bDescriptorSubtype (Call Management
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Functional Descriptor). */
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USB_DESC_BYTE (0x00), /* bmCapabilities (D0+D1). */
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USB_DESC_BYTE (0x01), /* bDataInterface. */
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/* ACM Functional Descriptor.*/
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USB_DESC_BYTE (4), /* bFunctionLength. */
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USB_DESC_BYTE (0x24), /* bDescriptorType (CS_INTERFACE). */
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USB_DESC_BYTE (0x02), /* bDescriptorSubtype (Abstract
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Control Management Descriptor). */
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USB_DESC_BYTE (0x02), /* bmCapabilities. */
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/* Union Functional Descriptor.*/
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USB_DESC_BYTE (5), /* bFunctionLength. */
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USB_DESC_BYTE (0x24), /* bDescriptorType (CS_INTERFACE). */
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USB_DESC_BYTE (0x06), /* bDescriptorSubtype (Union
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Functional Descriptor). */
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USB_DESC_BYTE (0x00), /* bMasterInterface (Communication
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Class Interface). */
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USB_DESC_BYTE (0x01), /* bSlaveInterface0 (Data Class
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Interface). */
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/* Endpoint 2 Descriptor.*/
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USB_DESC_ENDPOINT (USBD_INTERRUPT_REQUEST_EP|0x80,
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0x03, /* bmAttributes (Interrupt). */
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0x0008, /* wMaxPacketSize. */
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0xFF), /* bInterval. */
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/* Interface Descriptor.*/
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USB_DESC_INTERFACE (0x01, /* bInterfaceNumber. */
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0x00, /* bAlternateSetting. */
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0x02, /* bNumEndpoints. */
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0x0A, /* bInterfaceClass (Data Class
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Interface, CDC section 4.5). */
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0x00, /* bInterfaceSubClass (CDC section
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4.6). */
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0x00, /* bInterfaceProtocol (CDC section
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4.7). */
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0x00), /* iInterface. */
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/* Endpoint 3 Descriptor.*/
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USB_DESC_ENDPOINT (USBD_DATA_AVAILABLE_EP, /* bEndpointAddress.*/
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0x02, /* bmAttributes (Bulk). */
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0x0040, /* wMaxPacketSize. */
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0x00), /* bInterval. */
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/* Endpoint 1 Descriptor.*/
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USB_DESC_ENDPOINT (USBD_DATA_REQUEST_EP|0x80, /* bEndpointAddress.*/
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0x02, /* bmAttributes (Bulk). */
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0x0040, /* wMaxPacketSize. */
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0x00) /* bInterval. */
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};
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/*
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* U.S. English language identifier.
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*/
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static ROMCONST uint8_t vcom_string0[] = {
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USB_DESC_BYTE(4), /* bLength. */
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USB_DESC_BYTE(USB_DESCRIPTOR_STRING), /* bDescriptorType. */
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USB_DESC_WORD(0x0409) /* wLANGID (U.S. English). */
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};
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/*
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* Vendor string.
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*/
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static ROMCONST uint8_t vcom_string1[] = {
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USB_DESC_BYTE(38), /* bLength. */
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USB_DESC_BYTE(USB_DESCRIPTOR_STRING), /* bDescriptorType. */
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'S', 0, 'T', 0, 'M', 0, 'i', 0, 'c', 0, 'r', 0, 'o', 0, 'e', 0,
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'l', 0, 'e', 0, 'c', 0, 't', 0, 'r', 0, 'o', 0, 'n', 0, 'i', 0,
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'c', 0, 's', 0
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};
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/*
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* Device Description string.
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*/
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static ROMCONST uint8_t vcom_string2[] = {
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USB_DESC_BYTE(56), /* bLength. */
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USB_DESC_BYTE(USB_DESCRIPTOR_STRING), /* bDescriptorType. */
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'C', 0, 'h', 0, 'i', 0, 'b', 0, 'i', 0, 'O', 0, 'S', 0, '/', 0,
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'R', 0, 'T', 0, ' ', 0, 'V', 0, 'i', 0, 'r', 0, 't', 0, 'u', 0,
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'a', 0, 'l', 0, ' ', 0, 'C', 0, 'O', 0, 'M', 0, ' ', 0, 'P', 0,
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'o', 0, 'r', 0, 't', 0
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};
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/*
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* Serial Number string.
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*/
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static ROMCONST uint8_t vcom_string3[] = {
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USB_DESC_BYTE(8), /* bLength. */
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USB_DESC_BYTE(USB_DESCRIPTOR_STRING), /* bDescriptorType. */
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'0' + CH_KERNEL_MAJOR, 0,
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'0' + CH_KERNEL_MINOR, 0,
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'0' + CH_KERNEL_PATCH, 0
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};
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/*
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* Handles the GET_DESCRIPTOR callback.
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*/
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static const USBDescriptor *get_descriptor(USBDriver *usbp,
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uint8_t dtype,
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uint8_t dindex,
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uint16_t lang) {
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(void)usbp;
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(void)lang;
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(void)dtype;
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(void)dindex;
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return NULL;
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}
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/**
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* @brief IN EP1 state.
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*/
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static USBInEndpointState ep1instate;
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/**
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* @brief EP1 initialization structure
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*/
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static const USBEndpointConfig ep1config = {
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USB_EP_MODE_TYPE_BULK,
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NULL,
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sduDataTransmitted,
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NULL,
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0x0040,
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0,
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&ep1instate,
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NULL,
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};
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/**
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* @brief INTR EP3 state.
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*/
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static USBInEndpointState ep3instate;
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/**
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* @brief EP3 initialization structure (IN only).
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*/
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static const USBEndpointConfig ep3config = {
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USB_EP_MODE_TYPE_INTR,
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NULL,
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sduInterruptTransmitted,
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NULL,
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0x0010,
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0x0000,
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&ep3instate,
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NULL,
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};
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/**
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* @brief OUT EP3 state.
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*/
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static USBOutEndpointState ep3state;
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/**
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* @brief EP2 initialization structure
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*/
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static const USBEndpointConfig ep2config = {
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USB_EP_MODE_TYPE_BULK,
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NULL,
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NULL,
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sduDataReceived,
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0,
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0x0040,
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NULL,
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&ep3state,
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};
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/*
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* Handles the USB driver global events.
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*/
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static void usb_event(USBDriver *usbp, usbevent_t event) {
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extern SerialUSBDriver SDU1;
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switch (event) {
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case USB_EVENT_ADDRESS:
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return;
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case USB_EVENT_CONFIGURED:
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chSysLockFromISR();
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/* Enables the endpoints specified into the configuration.
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Note, this callback is invoked from an ISR so I-Class functions
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must be used.*/
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usbInitEndpointI(usbp, USBD_DATA_REQUEST_EP, &ep1config);
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usbInitEndpointI(usbp, USBD_DATA_AVAILABLE_EP, &ep2config);
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usbInitEndpointI(usbp, USBD_INTERRUPT_REQUEST_EP, &ep3config);
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/* Resetting the state of the CDC subsystem.*/
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sduConfigureHookI(&SDU1);
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chSysUnlockFromISR();
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return;
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case USB_EVENT_RESET:
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/* Falls into.*/
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case USB_EVENT_UNCONFIGURED:
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/* Falls into.*/
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case USB_EVENT_SUSPEND:
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chSysLockFromISR();
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/* Disconnection event on suspend.*/
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sduSuspendHookI(&SDU1);
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chSysUnlockFromISR();
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return;
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case USB_EVENT_WAKEUP:
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chSysLockFromISR();
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/* Connection event on wakeup.*/
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sduWakeupHookI(&SDU1);
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chSysUnlockFromISR();
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return;
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case USB_EVENT_STALLED:
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return;
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}
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return;
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}
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bool usb_setup_hook(USBDriver *usbp) {
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/* Override GET_DESCRIPTOR requests to return data from program memory */
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if ((usbp->setup[0] & (USB_RTYPE_RECIPIENT_MASK | USB_RTYPE_TYPE_MASK)) ==
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(USB_RTYPE_RECIPIENT_DEVICE | USB_RTYPE_TYPE_STD) &&
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usbp->setup[1] == USB_REQ_GET_DESCRIPTOR) {
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const uint8_t dtype = usbp->setup[3];
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const uint8_t dindex = usbp->setup[2];
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const AVR_USB_TX_BUF_ADDRESS_SPACE uint8_t *ddata = NULL;
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size_t dsize = 0;
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switch (dtype) {
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case USB_DESCRIPTOR_DEVICE:
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dsize = sizeof(vcom_device_descriptor_data);
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ddata = vcom_device_descriptor_data;
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break;
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case USB_DESCRIPTOR_CONFIGURATION:
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dsize = sizeof(vcom_configuration_descriptor_data);
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ddata = vcom_configuration_descriptor_data;
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break;
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case USB_DESCRIPTOR_STRING:
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if (dindex == 0) {
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dsize = sizeof(vcom_string0);
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ddata = vcom_string0;
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} else if (dindex == 1) {
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dsize = sizeof(vcom_string1);
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ddata = vcom_string1;
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} else if (dindex == 2) {
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dsize = sizeof(vcom_string2);
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ddata = vcom_string2;
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} else if (dindex == 3) {
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dsize = sizeof(vcom_string3);
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ddata = vcom_string3;
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}
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break;
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}
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if (ddata == NULL) {
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return false;
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}
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usbSetupTransfer(usbp, ddata, dsize, NULL);
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return true;
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}
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return sduRequestsHook(usbp);
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}
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/*
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* Handles the USB driver start of frame event.
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*/
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static void sof_handler(USBDriver *usbp) {
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(void)usbp;
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osalSysLockFromISR();
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sduSOFHookI(&SDU1);
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osalSysUnlockFromISR();
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}
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/*
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* USB driver configuration.
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*/
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const USBConfig usbcfg = {
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usb_event,
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get_descriptor,
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usb_setup_hook,
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sof_handler
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};
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/*
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* Serial over USB driver configuration.
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*/
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const SerialUSBConfig serusbcfg = {
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&USBD1,
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USBD_DATA_REQUEST_EP,
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USBD_DATA_AVAILABLE_EP,
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USBD_INTERRUPT_REQUEST_EP
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};
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