/**************************************************************************/ /*! @file cdc_serial_host_app.c @author hathach (tinyusb.org) @section LICENSE Software License Agreement (BSD License) Copyright (c) 2013, hathach (tinyusb.org) All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. Neither the name of the copyright holders nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. This file is part of the tinyusb stack. */ /**************************************************************************/ #include "cdc_serial_host_app.h" #include "app_os_prio.h" #if CFG_TUH_CDC #define QUEUE_SERIAL_DEPTH 100 //--------------------------------------------------------------------+ // MACRO CONSTANT TYPEDEF //--------------------------------------------------------------------+ static osal_semaphore_t sem_hdl; enum { SERIAL_BUFFER_SIZE = 64 }; CFG_TUSB_MEM_SECTION static uint8_t serial_in_buffer[SERIAL_BUFFER_SIZE]; CFG_TUSB_MEM_SECTION static uint8_t serial_out_buffer[SERIAL_BUFFER_SIZE]; static uint8_t received_bytes; // set by transfer complete callback //--------------------------------------------------------------------+ // tinyusb callbacks //--------------------------------------------------------------------+ void tuh_cdc_mounted_cb(uint8_t dev_addr) { // application set-up printf("\na CDC device (address %d) is mounted\n", dev_addr); tu_memclr(serial_in_buffer, sizeof(serial_in_buffer)); tu_memclr(serial_out_buffer, sizeof(serial_out_buffer)); received_bytes = 0; osal_semaphore_reset(sem_hdl); tuh_cdc_receive(dev_addr, serial_in_buffer, SERIAL_BUFFER_SIZE, true); // schedule first transfer } void tuh_cdc_unmounted_cb(uint8_t dev_addr) { // application tear-down printf("\na CDC device (address %d) is unmounted \n", dev_addr); } // invoked ISR context void tuh_cdc_xfer_isr(uint8_t dev_addr, xfer_result_t event, cdc_pipeid_t pipe_id, uint32_t xferred_bytes) { (void) dev_addr; // compiler warnings switch ( pipe_id ) { case CDC_PIPE_DATA_IN: switch(event) { case XFER_RESULT_SUCCESS: received_bytes = xferred_bytes; osal_semaphore_post(sem_hdl); // notify main task break; case XFER_RESULT_FAILED: received_bytes = 0; // ignore tuh_cdc_receive(dev_addr, serial_in_buffer, SERIAL_BUFFER_SIZE, true); // waiting for next data break; case XFER_RESULT_STALLED: default : break; } break; case CDC_PIPE_DATA_OUT: case CDC_PIPE_NOTIFICATION: default: break; } } //--------------------------------------------------------------------+ // APPLICATION //--------------------------------------------------------------------+ void cdc_serial_host_app_init(void) { sem_hdl = osal_semaphore_create(1, 0); TU_ASSERT( sem_hdl, VOID_RETURN); TU_VERIFY( osal_task_create(cdc_serial_host_app_task, "cdc", 128, NULL, CDC_SERIAL_APP_TASK_PRIO), ); } //------------- main task -------------// void cdc_serial_host_app_task( void* param ) { (void) param; OSAL_TASK_BEGIN //------------- send characters got from uart terminal to the first CDC device -------------// for(uint8_t dev_addr=1; dev_addr <= CFG_TUSB_HOST_DEVICE_MAX; dev_addr++) { if ( tuh_cdc_serial_is_mounted(dev_addr) ) { int ch_tx = getchar(); if ( ch_tx > 0 ) { // USB is much faster than serial, here we assume usb is always complete. There could be some characters missing though serial_out_buffer[0] = (uint8_t) ch_tx; if ( !tuh_cdc_is_busy(dev_addr, CDC_PIPE_DATA_OUT) ) { tuh_cdc_send(dev_addr, serial_out_buffer, 1, false); // no need for callback on serial out pipe } } break; // demo app only communicate with the first CDC-capable device } } //------------- print out received characters -------------// tusb_error_t error; osal_semaphore_wait(sem_hdl, 100, &error); // waiting for incoming data if ( TUSB_ERROR_NONE == error) { for(uint8_t i=0; i