101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2019 Ha Thach (tinyusb.org)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include "bsp/board.h"
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#include "tusb.h"
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//------------- prototypes -------------//
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static void cdc_task(void);
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/*------------- MAIN -------------*/
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int main(void)
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{
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board_init();
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tusb_init();
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while (1)
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{
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tud_task(); // tinyusb device task
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cdc_task();
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}
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return 0;
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}
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// echo to either Serial0 or Serial1
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// with Serial0 as all lower case, Serial1 as all upper case
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static void echo_serial_port(uint8_t itf, uint8_t buf[], uint32_t count)
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{
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for(uint32_t i=0; i<count; i++)
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{
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if (itf == 0)
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{
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// echo back 1st port as lower case
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if (isupper(buf[i])) buf[i] += 'a' - 'A';
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}
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else
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{
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// echo back 2nd port as upper case
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if (islower(buf[i])) buf[i] -= 'a' - 'A';
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}
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tud_cdc_n_write_char(itf, buf[i]);
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}
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tud_cdc_n_write_flush(itf);
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}
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//--------------------------------------------------------------------+
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// USB CDC
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//--------------------------------------------------------------------+
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static void cdc_task(void)
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{
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uint8_t itf;
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for (itf = 0; itf < CFG_TUD_CDC; itf++)
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{
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// connected() check for DTR bit
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// Most but not all terminal client set this when making connection
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// if ( tud_cdc_n_connected(itf) )
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{
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if ( tud_cdc_n_available(itf) )
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{
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uint8_t buf[64];
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uint32_t count = tud_cdc_n_read(itf, buf, sizeof(buf));
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// echo back to both serial ports
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echo_serial_port(0, buf, count);
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echo_serial_port(1, buf, count);
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}
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}
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}
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}
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