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/* Copyright (c) 2010-2011 mbed.org, MIT License
*
* 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 "stdint.h"
#include "USBCDC.h"
static uint8_t cdc_line_coding[7]= {0x80, 0x25, 0x00, 0x00, 0x00, 0x00, 0x08};
#define DEFAULT_CONFIGURATION (1)
#define CDC_SET_LINE_CODING 0x20
#define CDC_GET_LINE_CODING 0x21
#define CDC_SET_CONTROL_LINE_STATE 0x22
// Control Line State bits
#define CLS_DTR (1 << 0)
#define CLS_RTS (1 << 1)
#define MAX_CDC_REPORT_SIZE MAX_PACKET_SIZE_EPBULK
USBCDC::USBCDC(uint16_t vendor_id, uint16_t product_id, uint16_t product_release, bool connect_blocking): USBDevice(vendor_id, product_id, product_release) {
terminal_connected = false;
USBDevice::connect(connect_blocking);
}
bool USBCDC::USBCallback_request(void) {
/* Called in ISR context */
bool success = false;
CONTROL_TRANSFER * transfer = getTransferPtr();
/* Process class-specific requests */
if (transfer->setup.bmRequestType.Type == CLASS_TYPE) {
switch (transfer->setup.bRequest) {
case CDC_GET_LINE_CODING:
transfer->remaining = 7;
transfer->ptr = cdc_line_coding;
transfer->direction = DEVICE_TO_HOST;
success = true;
break;
case CDC_SET_LINE_CODING:
transfer->remaining = 7;
transfer->notify = true;
success = true;
break;
case CDC_SET_CONTROL_LINE_STATE:
if (transfer->setup.wValue & CLS_DTR) {
terminal_connected = true;
} else {
terminal_connected = false;
}
success = true;
break;
default:
break;
}
}
return success;
}
void USBCDC::USBCallback_requestCompleted(uint8_t *buf, uint32_t length) {
// Request of setting line coding has 7 bytes
if (length != 7) {
return;
}
CONTROL_TRANSFER * transfer = getTransferPtr();
/* Process class-specific requests */
if (transfer->setup.bmRequestType.Type == CLASS_TYPE) {
if (transfer->setup.bRequest == CDC_SET_LINE_CODING) {
if (memcmp(cdc_line_coding, buf, 7)) {
memcpy(cdc_line_coding, buf, 7);
int baud = buf[0] + (buf[1] << 8)
+ (buf[2] << 16) + (buf[3] << 24);
int stop = buf[4];
int bits = buf[6];
int parity = buf[5];
lineCodingChanged(baud, bits, parity, stop);
}
}
}
}
// Called in ISR context
// Set configuration. Return false if the
// configuration is not supported.
bool USBCDC::USBCallback_setConfiguration(uint8_t configuration) {
if (configuration != DEFAULT_CONFIGURATION) {
return false;
}
// Configure endpoints > 0
addEndpoint(EPINT_IN, MAX_PACKET_SIZE_EPINT);
addEndpoint(EPBULK_IN, MAX_PACKET_SIZE_EPBULK);
addEndpoint(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
// We activate the endpoint to be able to recceive data
readStart(EPBULK_OUT, MAX_PACKET_SIZE_EPBULK);
return true;
}
bool USBCDC::send(uint8_t * buffer, uint32_t size) {
return USBDevice::write(EPBULK_IN, buffer, size, MAX_CDC_REPORT_SIZE);
}
bool USBCDC::readEP(uint8_t * buffer, uint32_t * size) {
if (!USBDevice::readEP(EPBULK_OUT, buffer, size, MAX_CDC_REPORT_SIZE))
return false;
if (!readStart(EPBULK_OUT, MAX_CDC_REPORT_SIZE))
return false;
return true;
}
bool USBCDC::readEP_NB(uint8_t * buffer, uint32_t * size) {
if (!USBDevice::readEP_NB(EPBULK_OUT, buffer, size, MAX_CDC_REPORT_SIZE))
return false;
if (!readStart(EPBULK_OUT, MAX_CDC_REPORT_SIZE))
return false;
return true;
}
uint8_t * USBCDC::deviceDesc() {
static uint8_t deviceDescriptor[] = {
18, // bLength
1, // bDescriptorType
0x10, 0x01, // bcdUSB
2, // bDeviceClass
0, // bDeviceSubClass
0, // bDeviceProtocol
MAX_PACKET_SIZE_EP0, // bMaxPacketSize0
(uint8_t)(LSB(VENDOR_ID)), (uint8_t)(MSB(VENDOR_ID)), // idVendor
(uint8_t)(LSB(PRODUCT_ID)), (uint8_t)(MSB(PRODUCT_ID)),// idProduct
0x00, 0x01, // bcdDevice
1, // iManufacturer
2, // iProduct
3, // iSerialNumber
1 // bNumConfigurations
};
return deviceDescriptor;
}
uint8_t * USBCDC::stringIinterfaceDesc() {
static uint8_t stringIinterfaceDescriptor[] = {
0x08,
STRING_DESCRIPTOR,
'C',0,'D',0,'C',0,
};
return stringIinterfaceDescriptor;
}
uint8_t * USBCDC::stringIproductDesc() {
static uint8_t stringIproductDescriptor[] = {
0x16,
STRING_DESCRIPTOR,
'C',0,'D',0,'C',0,' ',0,'D',0,'E',0,'V',0,'I',0,'C',0,'E',0
};
return stringIproductDescriptor;
}
#define CONFIG1_DESC_SIZE (9+8+9+5+5+4+5+7+9+7+7)
uint8_t * USBCDC::configurationDesc() {
static uint8_t configDescriptor[] = {
// configuration descriptor
9, // bLength
2, // bDescriptorType
LSB(CONFIG1_DESC_SIZE), // wTotalLength
MSB(CONFIG1_DESC_SIZE),
2, // bNumInterfaces
1, // bConfigurationValue
0, // iConfiguration
0x80, // bmAttributes
50, // bMaxPower
// IAD to associate the two CDC interfaces
0x08, // bLength
0x0b, // bDescriptorType
0x00, // bFirstInterface
0x02, // bInterfaceCount
0x02, // bFunctionClass
0x02, // bFunctionSubClass
0, // bFunctionProtocol
0, // iFunction
// interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
9, // bLength
4, // bDescriptorType
0, // bInterfaceNumber
0, // bAlternateSetting
1, // bNumEndpoints
0x02, // bInterfaceClass
0x02, // bInterfaceSubClass
0x01, // bInterfaceProtocol
0, // iInterface
// CDC Header Functional Descriptor, CDC Spec 5.2.3.1, Table 26
5, // bFunctionLength
0x24, // bDescriptorType
0x00, // bDescriptorSubtype
0x10, 0x01, // bcdCDC
// Call Management Functional Descriptor, CDC Spec 5.2.3.2, Table 27
5, // bFunctionLength
0x24, // bDescriptorType
0x01, // bDescriptorSubtype
0x03, // bmCapabilities
1, // bDataInterface
// Abstract Control Management Functional Descriptor, CDC Spec 5.2.3.3, Table 28
4, // bFunctionLength
0x24, // bDescriptorType
0x02, // bDescriptorSubtype
0x06, // bmCapabilities
// Union Functional Descriptor, CDC Spec 5.2.3.8, Table 33
5, // bFunctionLength
0x24, // bDescriptorType
0x06, // bDescriptorSubtype
0, // bMasterInterface
1, // bSlaveInterface0
// endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
ENDPOINT_DESCRIPTOR_LENGTH, // bLength
ENDPOINT_DESCRIPTOR, // bDescriptorType
PHY_TO_DESC(EPINT_IN), // bEndpointAddress
E_INTERRUPT, // bmAttributes (0x03=intr)
LSB(MAX_PACKET_SIZE_EPINT), // wMaxPacketSize (LSB)
MSB(MAX_PACKET_SIZE_EPINT), // wMaxPacketSize (MSB)
16, // bInterval
// interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
9, // bLength
4, // bDescriptorType
1, // bInterfaceNumber
0, // bAlternateSetting
2, // bNumEndpoints
0x0A, // bInterfaceClass
0x00, // bInterfaceSubClass
0x00, // bInterfaceProtocol
0, // iInterface
// endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
ENDPOINT_DESCRIPTOR_LENGTH, // bLength
ENDPOINT_DESCRIPTOR, // bDescriptorType
PHY_TO_DESC(EPBULK_IN), // bEndpointAddress
E_BULK, // bmAttributes (0x02=bulk)
LSB(MAX_PACKET_SIZE_EPBULK),// wMaxPacketSize (LSB)
MSB(MAX_PACKET_SIZE_EPBULK),// wMaxPacketSize (MSB)
0, // bInterval
// endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
ENDPOINT_DESCRIPTOR_LENGTH, // bLength
ENDPOINT_DESCRIPTOR, // bDescriptorType
PHY_TO_DESC(EPBULK_OUT), // bEndpointAddress
E_BULK, // bmAttributes (0x02=bulk)
LSB(MAX_PACKET_SIZE_EPBULK),// wMaxPacketSize (LSB)
MSB(MAX_PACKET_SIZE_EPBULK),// wMaxPacketSize (MSB)
0 // bInterval
};
return configDescriptor;
}
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