/******************************************************************************
* The MIT License
*
* Copyright (c) 2011 LeafLabs LLC.
*
* 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.
*****************************************************************************/
/**
* @file libmaple/usb/stm32f1/usb_cdcacm.c
* @brief USB CDC ACM (a.k.a. virtual serial terminal, VCOM).
*
* FIXME: this works on the STM32F1 USB peripherals, and probably no
* place else. Nonportable bits really need to be factored out, and
* the result made cleaner.
*/
#include <libmaple/usb_cdcacm.h>
#include <libmaple/usb.h>
#include <libmaple/nvic.h>
#include <libmaple/delay.h>
/* Private headers */
#include "usb_lib_globals.h"
#include "usb_reg_map.h"
/* usb_lib headers */
#include "usb_type.h"
#include "usb_core.h"
#include "usb_def.h"
/******************************************************************************
******************************************************************************
***
*** HACK ALERT! FIXME FIXME FIXME FIXME!
***
*** A bunch of LeafLabs-specific configuration lives in here for
*** now. This mess REALLY needs to get teased apart, with
*** appropriate pieces moved into Wirish.
***
******************************************************************************
*****************************************************************************/
#if !(defined(BOARD_maple) || defined(BOARD_maple_RET6) || \
defined(BOARD_maple_mini) || defined(BOARD_maple_native))
#warning USB CDC ACM relies on LeafLabs board-specific configuration.\
You may have problems on non-LeafLabs boards.
#endif
static void vcomDataTxCb(void);
static void vcomDataRxCb(void);
static uint8* vcomGetSetLineCoding(uint16);
static void usbInit(void);
static void usbReset(void);
static RESULT usbDataSetup(uint8 request);
static RESULT usbNoDataSetup(uint8 request);
static RESULT usbGetInterfaceSetting(uint8 interface, uint8 alt_setting);
static uint8* usbGetDeviceDescriptor(uint16 length);
static uint8* usbGetConfigDescriptor(uint16 length);
static uint8* usbGetStringDescriptor(uint16 length);
static void usbSetConfiguration(void);
static void usbSetDeviceAddress(void);
/*
* Descriptors
*/
/* FIXME move to Wirish */
#define LEAFLABS_ID_VENDOR 0x1EAF
#define MAPLE_ID_PRODUCT 0x0004
static const usb_descriptor_device usbVcomDescriptor_Device =
USB_CDCACM_DECLARE_DEV_DESC(LEAFLABS_ID_VENDOR, MAPLE_ID_PRODUCT);
typedef struct {
usb_descriptor_config_header Config_Header;
usb_descriptor_interface CCI_Interface;
CDC_FUNCTIONAL_DESCRIPTOR(2) CDC_Functional_IntHeader;
CDC_FUNCTIONAL_DESCRIPTOR(2) CDC_Functional_CallManagement;
CDC_FUNCTIONAL_DESCRIPTOR(1) CDC_Functional_ACM;
CDC_FUNCTIONAL_DESCRIPTOR(2) CDC_Functional_Union;
usb_descriptor_endpoint ManagementEndpoint;
usb_descriptor_interface DCI_Interface;
usb_descriptor_endpoint DataOutEndpoint;
usb_descriptor_endpoint DataInEndpoint;
} __packed usb_descriptor_config;
#define MAX_POWER (100 >> 1)
static const usb_descriptor_config usbVcomDescriptor_Config = {
.Config_Header = {
.bLength = sizeof(usb_descriptor_config_header),
.bDescriptorType = USB_DESCRIPTOR_TYPE_CONFIGURATION,
.wTotalLength = sizeof(usb_descriptor_config),
.bNumInterfaces = 0x02,
.bConfigurationValue = 0x01,
.iConfiguration = 0x00,
.bmAttributes = (USB_CONFIG_ATTR_BUSPOWERED |
USB_CONFIG_ATTR_SELF_POWERED),
.bMaxPower = MAX_POWER,
},
.CCI_Interface = {
.bLength = sizeof(usb_descriptor_interface),
.bDescriptorType = USB_DESCRIPTOR_TYPE_INTERFACE,
.bInterfaceNumber = 0x00,
.bAlternateSetting = 0x00,
.bNumEndpoints = 0x01,
.bInterfaceClass = USB_INTERFACE_CLASS_CDC,
.bInterfaceSubClass = USB_INTERFACE_SUBCLASS_CDC_ACM,
.bInterfaceProtocol = 0x01, /* Common AT Commands */
.iInterface = 0x00,
},
.CDC_Functional_IntHeader = {
.bLength = CDC_FUNCTIONAL_DESCRIPTOR_SIZE(2),
.bDescriptorType = 0x24,
.SubType = 0x00,
.Data = {0x01, 0x10},
},
.CDC_Functional_CallManagement = {
.bLength = CDC_FUNCTIONAL_DESCRIPTOR_SIZE(2),
.bDescriptorType = 0x24,
.SubType = 0x01,
.Data = {0x03, 0x01},
},
.CDC_Functional_ACM = {
.bLength = CDC_FUNCTIONAL_DESCRIPTOR_SIZE(1),
.bDescriptorType = 0x24,
.SubType = 0x02,
.Data = {0x06},
},
.CDC_Functional_Union = {
.bLength = CDC_FUNCTIONAL_DESCRIPTOR_SIZE(2),
.bDescriptorType = 0x24,
.SubType = 0x06,
.Data = {0x00, 0x01},
},
.ManagementEndpoint = {
.bLength = sizeof(usb_descriptor_endpoint),
.bDescriptorType = USB_DESCRIPTOR_TYPE_ENDPOINT,
.bEndpointAddress = (USB_DESCRIPTOR_ENDPOINT_IN |
USB_CDCACM_MANAGEMENT_ENDP),
.bmAttributes = USB_EP_TYPE_INTERRUPT,
.wMaxPacketSize = USB_CDCACM_MANAGEMENT_EPSIZE,
.bInterval = 0xFF,
},
.DCI_Interface = {
.bLength = sizeof(usb_descriptor_interface),
.bDescriptorType = USB_DESCRIPTOR_TYPE_INTERFACE,
.bInterfaceNumber = 0x01,
.bAlternateSetting = 0x00,
.bNumEndpoints = 0x02,
.bInterfaceClass = USB_INTERFACE_CLASS_DIC,
.bInterfaceSubClass = 0x00, /* None */
.bInterfaceProtocol = 0x00, /* None */
.iInterface = 0x00,
},
.DataOutEndpoint = {
.bLength = sizeof(usb_descriptor_endpoint),
.bDescriptorType = USB_DESCRIPTOR_TYPE_ENDPOINT,
.bEndpointAddress = (USB_DESCRIPTOR_ENDPOINT_OUT |
USB_CDCACM_RX_ENDP),
.bmAttributes = USB_EP_TYPE_BULK,
.wMaxPacketSize = USB_CDCACM_RX_EPSIZE,
.bInterval = 0x00,
},
.DataInEndpoint = {
.bLength = sizeof(usb_descriptor_endpoint),
.bDescriptorType = USB_DESCRIPTOR_TYPE_ENDPOINT,
.bEndpointAddress = (USB_DESCRIPTOR_ENDPOINT_IN | USB_CDCACM_TX_ENDP),
.bmAttributes = USB_EP_TYPE_BULK,
.wMaxPacketSize = USB_CDCACM_TX_EPSIZE,
.bInterval = 0x00,
},
};
/*
String Descriptors:
we may choose to specify any or none of the following string
identifiers:
iManufacturer: LeafLabs
iProduct: Maple
iSerialNumber: NONE
iConfiguration: NONE
iInterface(CCI): NONE
iInterface(DCI): NONE
*/
/* Unicode language identifier: 0x0409 is US English */
/* FIXME move to Wirish */
static const usb_descriptor_string usbVcomDescriptor_LangID = {
.bLength = USB_DESCRIPTOR_STRING_LEN(1),
.bDescriptorType = USB_DESCRIPTOR_TYPE_STRING,
.bString = {0x09, 0x04},
};
/* FIXME move to Wirish */
static const usb_descriptor_string usbVcomDescriptor_iManufacturer = {
.bLength = USB_DESCRIPTOR_STRING_LEN(8),
.bDescriptorType = USB_DESCRIPTOR_TYPE_STRING,
.bString = {'L', 0, 'e', 0, 'a', 0, 'f', 0,
'L', 0, 'a', 0, 'b', 0, 's', 0},
};
/* FIXME move to Wirish */
static const usb_descriptor_string usbVcomDescriptor_iProduct = {
.bLength = USB_DESCRIPTOR_STRING_LEN(5),
.bDescriptorType = USB_DESCRIPTOR_TYPE_STRING,
.bString = {'M', 0, 'a', 0, 'p', 0, 'l', 0, 'e', 0},
};
static ONE_DESCRIPTOR Device_Descriptor = {
(uint8*)&usbVcomDescriptor_Device,
sizeof(usb_descriptor_device)
};
static ONE_DESCRIPTOR Config_Descriptor = {
(uint8*)&usbVcomDescriptor_Config,
sizeof(usb_descriptor_config)
};
#define N_STRING_DESCRIPTORS 3
static ONE_DESCRIPTOR String_Descriptor[N_STRING_DESCRIPTORS] = {
{(uint8*)&usbVcomDescriptor_LangID, USB_DESCRIPTOR_STRING_LEN(1)},
{(uint8*)&usbVcomDescriptor_iManufacturer,USB_DESCRIPTOR_STRING_LEN(8)},
{(uint8*)&usbVcomDescriptor_iProduct, USB_DESCRIPTOR_STRING_LEN(5)}
};
/*
* Etc.
*/
/* I/O state */
/* Received data */
static volatile uint8 vcomBufferRx[USB_CDCACM_RX_EPSIZE];
/* Read index into vcomBufferRx */
static volatile uint32 rx_offset = 0;
/* Number of bytes left to transmit */
static volatile uint32 n_unsent_bytes = 0;
/* Are we currently sending an IN packet? */
static volatile uint8 transmitting = 0;
/* Number of unread bytes */
static volatile uint32 n_unread_bytes = 0;
/* Other state (line coding, DTR/RTS) */
static volatile usb_cdcacm_line_coding line_coding = {
/* This default is 115200 baud, 8N1. */
.dwDTERate = 115200,
.bCharFormat = USB_CDCACM_STOP_BITS_1,
.bParityType = USB_CDCACM_PARITY_NONE,
.bDataBits = 8,
};
/* DTR in bit 0, RTS in bit 1. */
static volatile uint8 line_dtr_rts = 0;
/*
* Endpoint callbacks
*/
static void (*ep_int_in[7])(void) =
{vcomDataTxCb,
NOP_Process,
NOP_Process,
NOP_Process,
NOP_Process,
NOP_Process,
NOP_Process};
static void (*ep_int_out[7])(void) =
{NOP_Process,
NOP_Process,
vcomDataRxCb,
NOP_Process,
NOP_Process,
NOP_Process,
NOP_Process};
/*
* Globals required by usb_lib/
*
* Mark these weak so they can be overriden to implement other USB
* functionality.
*/
#define NUM_ENDPTS 0x04
__weak DEVICE Device_Table = {
.Total_Endpoint = NUM_ENDPTS,
.Total_Configuration = 1
};
#define MAX_PACKET_SIZE 0x40 /* 64B, maximum for USB FS Devices */
__weak DEVICE_PROP Device_Property = {
.Init = usbInit,
.Reset = usbReset,
.Process_Status_IN = NOP_Process,
.Process_Status_OUT = NOP_Process,
.Class_Data_Setup = usbDataSetup,
.Class_NoData_Setup = usbNoDataSetup,
.Class_Get_Interface_Setting = usbGetInterfaceSetting,
.GetDeviceDescriptor = usbGetDeviceDescriptor,
.GetConfigDescriptor = usbGetConfigDescriptor,
.GetStringDescriptor = usbGetStringDescriptor,
.RxEP_buffer = NULL,
.MaxPacketSize = MAX_PACKET_SIZE
};
__weak USER_STANDARD_REQUESTS User_Standard_Requests = {
.User_GetConfiguration = NOP_Process,
.User_SetConfiguration = usbSetConfiguration,
.User_GetInterface = NOP_Process,
.User_SetInterface = NOP_Process,
.User_GetStatus = NOP_Process,
.User_ClearFeature = NOP_Process,
.User_SetEndPointFeature = NOP_Process,
.User_SetDeviceFeature = NOP_Process,
.User_SetDeviceAddress = usbSetDeviceAddress
};
/*
* User hooks
*/
static void (*rx_hook)(unsigned, void*) = 0;
static void (*iface_setup_hook)(unsigned, void*) = 0;
void usb_cdcacm_set_hooks(unsigned hook_flags, void (*hook)(unsigned, void*)) {
if (hook_flags & USB_CDCACM_HOOK_RX) {
rx_hook = hook;
}
if (hook_flags & USB_CDCACM_HOOK_IFACE_SETUP) {
iface_setup_hook = hook;
}
}
/*
* CDC ACM interface
*/
void usb_cdcacm_enable(gpio_dev *disc_dev, uint8 disc_bit) {
/* Present ourselves to the host. Writing 0 to "disc" pin must
* pull USB_DP pin up while leaving USB_DM pulled down by the
* transceiver. See USB 2.0 spec, section 7.1.7.3. */
gpio_set_mode(disc_dev, disc_bit, GPIO_OUTPUT_PP);
gpio_write_bit(disc_dev, disc_bit, 0);
/* Initialize the USB peripheral. */
usb_init_usblib(USBLIB, ep_int_in, ep_int_out);
}
void usb_cdcacm_disable(gpio_dev *disc_dev, uint8 disc_bit) {
/* Turn off the interrupt and signal disconnect (see e.g. USB 2.0
* spec, section 7.1.7.3). */
nvic_irq_disable(NVIC_USB_LP_CAN_RX0);
gpio_write_bit(disc_dev, disc_bit, 1);
}
void usb_cdcacm_putc(char ch) {
while (!usb_cdcacm_tx((uint8*)&ch, 1))
;
}
/* This function is non-blocking.
*
* It copies data from a usercode buffer into the USB peripheral TX
* buffer, and returns the number of bytes copied. */
uint32 usb_cdcacm_tx(const uint8* buf, uint32 len) {
/* Last transmission hasn't finished, so abort. */
if (usb_cdcacm_is_transmitting()) {
return 0;
}
/* We can only put USB_CDCACM_TX_EPSIZE bytes in the buffer. */
if (len > USB_CDCACM_TX_EPSIZE) {
len = USB_CDCACM_TX_EPSIZE;
}
/* Queue bytes for sending. */
if (len) {
usb_copy_to_pma(buf, len, USB_CDCACM_TX_ADDR);
}
// We still need to wait for the interrupt, even if we're sending
// zero bytes. (Sending zero-size packets is useful for flushing
// host-side buffers.)
usb_set_ep_tx_count(USB_CDCACM_TX_ENDP, len);
n_unsent_bytes = len;
transmitting = 1;
usb_set_ep_tx_stat(USB_CDCACM_TX_ENDP, USB_EP_STAT_TX_VALID);
return len;
}
uint32 usb_cdcacm_data_available(void) {
return n_unread_bytes;
}
uint8 usb_cdcacm_is_transmitting(void) {
return transmitting;
}
uint16 usb_cdcacm_get_pending(void) {
return n_unsent_bytes;
}
/* Nonblocking byte receive.
*
* Copies up to len bytes from our private data buffer (*NOT* the PMA)
* into buf and deq's the FIFO. */
uint32 usb_cdcacm_rx(uint8* buf, uint32 len) {
/* Copy bytes to buffer. */
uint32 n_copied = usb_cdcacm_peek(buf, len);
/* Mark bytes as read. */
n_unread_bytes -= n_copied;
rx_offset += n_copied;
/* If all bytes have been read, re-enable the RX endpoint, which
* was set to NAK when the current batch of bytes was received. */
if (n_unread_bytes == 0) {
usb_set_ep_rx_count(USB_CDCACM_RX_ENDP, USB_CDCACM_RX_EPSIZE);
usb_set_ep_rx_stat(USB_CDCACM_RX_ENDP, USB_EP_STAT_RX_VALID);
rx_offset = 0;
}
return n_copied;
}
/* Nonblocking byte lookahead.
*
* Looks at unread bytes without marking them as read. */
uint32 usb_cdcacm_peek(uint8* buf, uint32 len) {
int i;
if (len > n_unread_bytes) {
len = n_unread_bytes;
}
for (i = 0; i < len; i++) {
buf[i] = vcomBufferRx[i + rx_offset];
}
return len;
}
uint8 usb_cdcacm_get_dtr() {
return ((line_dtr_rts & USB_CDCACM_CONTROL_LINE_DTR) != 0);
}
uint8 usb_cdcacm_get_rts() {
return ((line_dtr_rts & USB_CDCACM_CONTROL_LINE_RTS) != 0);
}
void usb_cdcacm_get_line_coding(usb_cdcacm_line_coding *ret) {
ret->dwDTERate = line_coding.dwDTERate;
ret->bCharFormat = line_coding.bCharFormat;
ret->bParityType = line_coding.bParityType;
ret->bDataBits = line_coding.bDataBits;
}
int usb_cdcacm_get_baud(void) {
return line_coding.dwDTERate;
}
int usb_cdcacm_get_stop_bits(void) {
return line_coding.bCharFormat;
}
int usb_cdcacm_get_parity(void) {
return line_coding.bParityType;
}
int usb_cdcacm_get_n_data_bits(void) {
return line_coding.bDataBits;
}
/*
* Callbacks
*/
static void vcomDataTxCb(void) {
n_unsent_bytes = 0;
transmitting = 0;
}
static void vcomDataRxCb(void) {
usb_set_ep_rx_stat(USB_CDCACM_RX_ENDP, USB_EP_STAT_RX_NAK);
n_unread_bytes = usb_get_ep_rx_count(USB_CDCACM_RX_ENDP);
/* This copy won't overwrite unread bytes, since we've set the RX
* endpoint to NAK, and will only set it to VALID when all bytes
* have been read. */
usb_copy_from_pma((uint8*)vcomBufferRx, n_unread_bytes,
USB_CDCACM_RX_ADDR);
if (n_unread_bytes == 0) {
usb_set_ep_rx_count(USB_CDCACM_RX_ENDP, USB_CDCACM_RX_EPSIZE);
usb_set_ep_rx_stat(USB_CDCACM_RX_ENDP, USB_EP_STAT_RX_VALID);
rx_offset = 0;
}
if (rx_hook) {
rx_hook(USB_CDCACM_HOOK_RX, 0);
}
}
static uint8* vcomGetSetLineCoding(uint16 length) {
if (length == 0) {
pInformation->Ctrl_Info.Usb_wLength = sizeof(struct usb_cdcacm_line_coding);
}
return (uint8*)&line_coding;
}
static void usbInit(void) {
pInformation->Current_Configuration = 0;
USB_BASE->CNTR = USB_CNTR_FRES;
USBLIB->irq_mask = 0;
USB_BASE->CNTR = USBLIB->irq_mask;
USB_BASE->ISTR = 0;
USBLIB->irq_mask = USB_CNTR_RESETM | USB_CNTR_SUSPM | USB_CNTR_WKUPM;
USB_BASE->CNTR = USBLIB->irq_mask;
USB_BASE->ISTR = 0;
USBLIB->irq_mask = USB_ISR_MSK;
USB_BASE->CNTR = USBLIB->irq_mask;
nvic_irq_enable(NVIC_USB_LP_CAN_RX0);
USBLIB->state = USB_UNCONNECTED;
}
#define BTABLE_ADDRESS 0x00
static void usbReset(void) {
pInformation->Current_Configuration = 0;
/* current feature is current bmAttributes */
pInformation->Current_Feature = (USB_CONFIG_ATTR_BUSPOWERED |
USB_CONFIG_ATTR_SELF_POWERED);
USB_BASE->BTABLE = BTABLE_ADDRESS;
/* setup control endpoint 0 */
usb_set_ep_type(USB_EP0, USB_EP_EP_TYPE_CONTROL);
usb_set_ep_tx_stat(USB_EP0, USB_EP_STAT_TX_STALL);
usb_set_ep_rx_addr(USB_EP0, USB_CDCACM_CTRL_RX_ADDR);
usb_set_ep_tx_addr(USB_EP0, USB_CDCACM_CTRL_TX_ADDR);
usb_clear_status_out(USB_EP0);
usb_set_ep_rx_count(USB_EP0, pProperty->MaxPacketSize);
usb_set_ep_rx_stat(USB_EP0, USB_EP_STAT_RX_VALID);
/* setup management endpoint 1 */
usb_set_ep_type(USB_CDCACM_MANAGEMENT_ENDP, USB_EP_EP_TYPE_INTERRUPT);
usb_set_ep_tx_addr(USB_CDCACM_MANAGEMENT_ENDP,
USB_CDCACM_MANAGEMENT_ADDR);
usb_set_ep_tx_stat(USB_CDCACM_MANAGEMENT_ENDP, USB_EP_STAT_TX_NAK);
usb_set_ep_rx_stat(USB_CDCACM_MANAGEMENT_ENDP, USB_EP_STAT_RX_DISABLED);
/* TODO figure out differences in style between RX/TX EP setup */
/* set up data endpoint OUT (RX) */
usb_set_ep_type(USB_CDCACM_RX_ENDP, USB_EP_EP_TYPE_BULK);
usb_set_ep_rx_addr(USB_CDCACM_RX_ENDP, USB_CDCACM_RX_ADDR);
usb_set_ep_rx_count(USB_CDCACM_RX_ENDP, USB_CDCACM_RX_EPSIZE);
usb_set_ep_rx_stat(USB_CDCACM_RX_ENDP, USB_EP_STAT_RX_VALID);
/* set up data endpoint IN (TX) */
usb_set_ep_type(USB_CDCACM_TX_ENDP, USB_EP_EP_TYPE_BULK);
usb_set_ep_tx_addr(USB_CDCACM_TX_ENDP, USB_CDCACM_TX_ADDR);
usb_set_ep_tx_stat(USB_CDCACM_TX_ENDP, USB_EP_STAT_TX_NAK);
usb_set_ep_rx_stat(USB_CDCACM_TX_ENDP, USB_EP_STAT_RX_DISABLED);
USBLIB->state = USB_ATTACHED;
SetDeviceAddress(0);
/* Reset the RX/TX state */
n_unread_bytes = 0;
n_unsent_bytes = 0;
rx_offset = 0;
transmitting = 0;
}
static RESULT usbDataSetup(uint8 request) {
uint8* (*CopyRoutine)(uint16) = 0;
if (Type_Recipient == (CLASS_REQUEST | INTERFACE_RECIPIENT)) {
switch (request) {
case USB_CDCACM_GET_LINE_CODING:
CopyRoutine = vcomGetSetLineCoding;
break;
case USB_CDCACM_SET_LINE_CODING:
CopyRoutine = vcomGetSetLineCoding;
break;
default:
break;
}
/* Call the user hook. */
if (iface_setup_hook) {
uint8 req_copy = request;
iface_setup_hook(USB_CDCACM_HOOK_IFACE_SETUP, &req_copy);
}
}
if (CopyRoutine == NULL) {
return USB_UNSUPPORT;
}
pInformation->Ctrl_Info.CopyData = CopyRoutine;
pInformation->Ctrl_Info.Usb_wOffset = 0;
(*CopyRoutine)(0);
return USB_SUCCESS;
}
static RESULT usbNoDataSetup(uint8 request) {
RESULT ret = USB_UNSUPPORT;
if (Type_Recipient == (CLASS_REQUEST | INTERFACE_RECIPIENT)) {
switch (request) {
case USB_CDCACM_SET_COMM_FEATURE:
/* We support set comm. feature, but don't handle it. */
ret = USB_SUCCESS;
break;
case USB_CDCACM_SET_CONTROL_LINE_STATE:
/* Track changes to DTR and RTS. */
line_dtr_rts = (pInformation->USBwValues.bw.bb0 &
(USB_CDCACM_CONTROL_LINE_DTR |
USB_CDCACM_CONTROL_LINE_RTS));
ret = USB_SUCCESS;
break;
}
/* Call the user hook. */
if (iface_setup_hook) {
uint8 req_copy = request;
iface_setup_hook(USB_CDCACM_HOOK_IFACE_SETUP, &req_copy);
}
}
return ret;
}
static RESULT usbGetInterfaceSetting(uint8 interface, uint8 alt_setting) {
if (alt_setting > 0) {
return USB_UNSUPPORT;
} else if (interface > 1) {
return USB_UNSUPPORT;
}
return USB_SUCCESS;
}
static uint8* usbGetDeviceDescriptor(uint16 length) {
return Standard_GetDescriptorData(length, &Device_Descriptor);
}
static uint8* usbGetConfigDescriptor(uint16 length) {
return Standard_GetDescriptorData(length, &Config_Descriptor);
}
static uint8* usbGetStringDescriptor(uint16 length) {
uint8 wValue0 = pInformation->USBwValue0;
if (wValue0 > N_STRING_DESCRIPTORS) {
return NULL;
}
return Standard_GetDescriptorData(length, &String_Descriptor[wValue0]);
}
static void usbSetConfiguration(void) {
if (pInformation->Current_Configuration != 0) {
USBLIB->state = USB_CONFIGURED;
}
}
static void usbSetDeviceAddress(void) {
USBLIB->state = USB_ADDRESSED;
}