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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.
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include "bsp/board.h"
#include "tusb.h"
//------------- prototypes -------------//
static void cdc_task(void);
/*------------- MAIN -------------*/
int main(void)
{
board_init();
tusb_init();
while (1)
{
tud_task(); // tinyusb device task
cdc_task();
}
return 0;
}
// echo to either Serial0 or Serial1
// with Serial0 as all lower case, Serial1 as all upper case
static void echo_serial_port(uint8_t itf, uint8_t buf[], uint32_t count)
{
for(uint32_t i=0; i<count; i++)
{
if (itf == 0)
{
// echo back 1st port as lower case
if (isupper(buf[i])) buf[i] += 'a' - 'A';
}
else
{
// echo back 2nd port as upper case
if (islower(buf[i])) buf[i] -= 'a' - 'A';
}
tud_cdc_n_write_char(itf, buf[i]);
}
tud_cdc_n_write_flush(itf);
}
//--------------------------------------------------------------------+
// USB CDC
//--------------------------------------------------------------------+
static void cdc_task(void)
{
uint8_t itf;
for (itf = 0; itf < CFG_TUD_CDC; itf++)
{
// connected() check for DTR bit
// Most but not all terminal client set this when making connection
// if ( tud_cdc_n_connected(itf) )
{
if ( tud_cdc_n_available(itf) )
{
uint8_t buf[64];
uint32_t count = tud_cdc_n_read(itf, buf, sizeof(buf));
// echo back to both serial ports
echo_serial_port(0, buf, count);
echo_serial_port(1, buf, count);
}
}
}
}
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