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/*
* The MIT License (MIT)
*
* Copyright (c) 2019 Ha Thach (tinyusb.org)
*
* 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.
*
* 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<received_bytes; i++) putchar(serial_in_buffer[i]);
for(uint8_t dev_addr=1; dev_addr <= CFG_TUSB_HOST_DEVICE_MAX; dev_addr++)
{
if ( tuh_cdc_serial_is_mounted(dev_addr) )
{
tuh_cdc_receive(dev_addr, serial_in_buffer, SERIAL_BUFFER_SIZE, true);
break; // demo app only communicate with the first CDC-capable device
}
}
}
OSAL_TASK_END
}
#endif
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