304 lines
10 KiB
C
304 lines
10 KiB
C
/**************************************************************************/
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/*!
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@file cdc_device.c
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@author hathach (tinyusb.org)
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@section LICENSE
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Software License Agreement (BSD License)
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Copyright (c) 2013, hathach (tinyusb.org)
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the copyright holders nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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This file is part of the tinyusb stack.
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*/
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/**************************************************************************/
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#include "tusb_option.h"
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#if (MODE_DEVICE_SUPPORTED && TUSB_CFG_DEVICE_CDC)
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#define _TINY_USB_SOURCE_FILE_
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//--------------------------------------------------------------------+
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// INCLUDE
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//--------------------------------------------------------------------+
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#include <common/tusb_common.h>
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#include "cdc_device.h"
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//--------------------------------------------------------------------+
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// MACRO CONSTANT TYPEDEF
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//--------------------------------------------------------------------+
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TUSB_CFG_ATTR_USBRAM STATIC_VAR cdc_line_coding_t cdcd_line_coding[CONTROLLER_DEVICE_NUMBER];
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typedef struct {
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uint8_t interface_number;
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cdc_acm_capability_t acm_capability;
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bool connected;
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uint8_t ep_addr[3]; // notification, data in, data out
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}cdcd_data_t;
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// TODO multiple port
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TUSB_CFG_ATTR_USBRAM ATTR_ALIGNED(4) uint8_t _tmp_rx_buf[64];
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TUSB_CFG_ATTR_USBRAM ATTR_ALIGNED(4) uint8_t _tmp_tx_buf[64];
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#define CFG_TUD_CDC_BUFSIZE 128
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FIFO_DEF(_rx_ff, CFG_TUD_CDC_BUFSIZE, uint8_t, true);
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FIFO_DEF(_tx_ff, CFG_TUD_CDC_BUFSIZE, uint8_t, true);
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//--------------------------------------------------------------------+
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// INTERNAL OBJECT & FUNCTION DECLARATION
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//--------------------------------------------------------------------+
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STATIC_VAR cdcd_data_t cdcd_data[CONTROLLER_DEVICE_NUMBER];
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//--------------------------------------------------------------------+
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// APPLICATION API
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//--------------------------------------------------------------------+
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bool tud_n_cdc_connected(uint8_t port)
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{
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return cdcd_data[port].connected;
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}
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uint32_t tud_n_cdc_available(uint8_t port)
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{
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return fifo_count(&_rx_ff);
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}
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int tud_n_cdc_read_char(uint8_t port)
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{
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uint8_t ch;
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return fifo_read(&_rx_ff, &ch) ? ch : (-1);
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}
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uint32_t tud_n_cdc_read(uint8_t port, void* buffer, uint32_t bufsize)
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{
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return fifo_read_n(&_rx_ff, buffer, bufsize);
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}
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uint32_t tud_n_cdc_write_char(uint8_t port, char ch)
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{
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return fifo_write(&_tx_ff, &ch);
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}
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uint32_t tud_n_cdc_write(uint8_t port, void const* buffer, uint32_t bufsize)
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{
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return fifo_write_n(&_tx_ff, buffer, bufsize);
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}
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//--------------------------------------------------------------------+
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// USBD Driver API
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//--------------------------------------------------------------------+
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void cdcd_init(void)
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{
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memclr_(cdcd_data, sizeof(cdcd_data_t)*CONTROLLER_DEVICE_NUMBER);
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// default line coding is : stop bit = 1, parity = none, data bits = 8
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memclr_(cdcd_line_coding, sizeof(cdc_line_coding_t)*CONTROLLER_DEVICE_NUMBER);
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for(uint8_t i=0; i<CONTROLLER_DEVICE_NUMBER; i++)
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{
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cdcd_line_coding[i].bit_rate = 115200;
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cdcd_line_coding[i].stop_bits = 0;
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cdcd_line_coding[i].parity = 0;
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cdcd_line_coding[i].data_bits = 8;
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}
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}
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tusb_error_t cdcd_open(uint8_t port, tusb_descriptor_interface_t const * p_interface_desc, uint16_t *p_length)
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{
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if ( CDC_COMM_SUBCLASS_ABSTRACT_CONTROL_MODEL != p_interface_desc->bInterfaceSubClass) return TUSB_ERROR_CDC_UNSUPPORTED_SUBCLASS;
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if ( !(is_in_range(CDC_COMM_PROTOCOL_ATCOMMAND, p_interface_desc->bInterfaceProtocol, CDC_COMM_PROTOCOL_ATCOMMAND_CDMA) ||
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0xff == p_interface_desc->bInterfaceProtocol) )
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{
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return TUSB_ERROR_CDC_UNSUPPORTED_PROTOCOL;
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}
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uint8_t const * p_desc = descriptor_next ( (uint8_t const *) p_interface_desc );
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cdcd_data_t * p_cdc = &cdcd_data[port];
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//------------- Communication Interface -------------//
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(*p_length) = sizeof(tusb_descriptor_interface_t);
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while( TUSB_DESC_CLASS_SPECIFIC == p_desc[DESCRIPTOR_OFFSET_TYPE] )
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{ // Communication Functional Descriptors
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if ( CDC_FUNC_DESC_ABSTRACT_CONTROL_MANAGEMENT == cdc_functional_desc_typeof(p_desc) )
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{ // save ACM bmCapabilities
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p_cdc->acm_capability = ((cdc_desc_func_abstract_control_management_t const *) p_desc)->bmCapabilities;
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}
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(*p_length) += p_desc[DESCRIPTOR_OFFSET_LENGTH];
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p_desc = descriptor_next(p_desc);
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}
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if ( TUSB_DESC_ENDPOINT == p_desc[DESCRIPTOR_OFFSET_TYPE])
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{ // notification endpoint if any
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TU_ASSERT( tusb_dcd_edpt_open(port, (tusb_descriptor_endpoint_t const *) p_desc), TUSB_ERROR_DCD_OPEN_PIPE_FAILED);
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p_cdc->ep_addr[CDC_PIPE_NOTIFICATION] = ((tusb_descriptor_endpoint_t const *) p_desc)->bEndpointAddress;
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(*p_length) += p_desc[DESCRIPTOR_OFFSET_LENGTH];
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p_desc = descriptor_next(p_desc);
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}
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//------------- Data Interface (if any) -------------//
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if ( (TUSB_DESC_INTERFACE == p_desc[DESCRIPTOR_OFFSET_TYPE]) &&
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(TUSB_CLASS_CDC_DATA == ((tusb_descriptor_interface_t const *) p_desc)->bInterfaceClass) )
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{
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(*p_length) += p_desc[DESCRIPTOR_OFFSET_LENGTH];
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p_desc = descriptor_next(p_desc);
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// data endpoints expected to be in pairs
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for(uint32_t i=0; i<2; i++)
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{
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tusb_descriptor_endpoint_t const *p_endpoint = (tusb_descriptor_endpoint_t const *) p_desc;
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TU_ASSERT(TUSB_DESC_ENDPOINT == p_endpoint->bDescriptorType, TUSB_ERROR_DESCRIPTOR_CORRUPTED);
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TU_ASSERT(TUSB_XFER_BULK == p_endpoint->bmAttributes.xfer, TUSB_ERROR_DESCRIPTOR_CORRUPTED);
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TU_ASSERT( tusb_dcd_edpt_open(port, p_endpoint), TUSB_ERROR_DCD_OPEN_PIPE_FAILED);
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if ( p_endpoint->bEndpointAddress & TUSB_DIR_IN_MASK )
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{
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p_cdc->ep_addr[CDC_PIPE_DATA_IN] = p_endpoint->bEndpointAddress;
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}else
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{
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p_cdc->ep_addr[CDC_PIPE_DATA_OUT] = p_endpoint->bEndpointAddress;
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}
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(*p_length) += p_desc[DESCRIPTOR_OFFSET_LENGTH];
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p_desc = descriptor_next( p_desc );
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}
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}
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p_cdc->interface_number = p_interface_desc->bInterfaceNumber;
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// Prepare for incoming data
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TU_ASSERT( tusb_dcd_edpt_xfer(port, p_cdc->ep_addr[CDC_PIPE_DATA_OUT], _tmp_rx_buf, sizeof(_tmp_rx_buf), true), TUSB_ERROR_DCD_EDPT_XFER);
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return TUSB_ERROR_NONE;
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}
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void cdcd_close(uint8_t port)
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{
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// no need to close opened pipe, dcd bus reset will put controller's endpoints to default state
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memclr_(&cdcd_data[port], sizeof(cdcd_data_t));
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fifo_clear(&_rx_ff);
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fifo_clear(&_tx_ff);
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}
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tusb_error_t cdcd_control_request_subtask(uint8_t port, tusb_control_request_t const * p_request)
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{
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OSAL_SUBTASK_BEGIN
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tusb_error_t err;
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//------------- Class Specific Request -------------//
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if (p_request->bmRequestType_bit.type != TUSB_REQ_TYPE_CLASS) return TUSB_ERROR_DCD_CONTROL_REQUEST_NOT_SUPPORT;
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if (CDC_REQUEST_GET_LINE_CODING == p_request->bRequest)
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{
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OSAL_SUBTASK_INVOKED( usbd_control_xfer_substak(port, (tusb_dir_t) p_request->bmRequestType_bit.direction,
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(uint8_t*) &cdcd_line_coding[port], min16_of(sizeof(cdc_line_coding_t), p_request->wLength)), err );
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}
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else if (CDC_REQUEST_SET_LINE_CODING == p_request->bRequest)
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{
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OSAL_SUBTASK_INVOKED( usbd_control_xfer_substak(port, (tusb_dir_t) p_request->bmRequestType_bit.direction,
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(uint8_t*) &cdcd_line_coding[port], min16_of(sizeof(cdc_line_coding_t), p_request->wLength)), err );
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// TODO notify application on xfer completea
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}
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else if (CDC_REQUEST_SET_CONTROL_LINE_STATE == p_request->bRequest )
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{
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enum {
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ACTIVE_DTE_PRESENT = 0x0003,
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ACTIVE_DTE_NOT_PRESENT = 0x0002
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};
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cdcd_data_t * p_cdc = &cdcd_data[port];
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if (p_request->wValue == ACTIVE_DTE_PRESENT)
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{
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// terminal connected
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p_cdc->connected = true;
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}
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else if (p_request->wValue == ACTIVE_DTE_NOT_PRESENT)
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{
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// terminal disconnected
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p_cdc->connected = false;
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}else
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{
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// De-active --> disconnected
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p_cdc->connected = false;
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}
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}
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else
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{
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SUBTASK_RETURN(TUSB_ERROR_DCD_CONTROL_REQUEST_NOT_SUPPORT);
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}
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OSAL_SUBTASK_END
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}
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tusb_error_t cdcd_xfer_cb(uint8_t port, uint8_t ep_addr, tusb_event_t event, uint32_t xferred_bytes)
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{
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cdcd_data_t const * p_cdc = &cdcd_data[port];
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if ( ep_addr == p_cdc->ep_addr[CDC_PIPE_DATA_OUT] )
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{
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fifo_write_n(&_rx_ff, _tmp_rx_buf, xferred_bytes);
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// preparing for next
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TU_ASSERT(tusb_dcd_edpt_xfer(port, p_cdc->ep_addr[CDC_PIPE_DATA_OUT], _tmp_rx_buf, sizeof(_tmp_rx_buf), true), TUSB_ERROR_DCD_EDPT_XFER);
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// fire callback
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tud_cdc_rx_cb(port);
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}
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return TUSB_ERROR_NONE;
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}
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bool tud_n_cdc_flush (uint8_t port)
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{
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VERIFY( tud_n_cdc_connected(port) );
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uint8_t edpt = cdcd_data[port].ep_addr[CDC_PIPE_DATA_IN];
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VERIFY( !tusb_dcd_edpt_busy(port, edpt) );
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uint16_t count = fifo_read_n(&_tx_ff, _tmp_tx_buf, sizeof(_tmp_tx_buf));
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TU_ASSERT( tusb_dcd_edpt_xfer(port, edpt, _tmp_tx_buf, count, false) );
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return true;
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}
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void cdcd_sof(uint8_t port)
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{
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tud_n_cdc_flush(port);
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}
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#endif
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