173 lines
6.5 KiB
C++
173 lines
6.5 KiB
C++
/* Teensyduino Core Library
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* http://www.pjrc.com/teensy/
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* Copyright (c) 2017 PJRC.COM, LLC.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* 1. The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* 2. If the Software is incorporated into a build system that allows
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* selection among a list of target devices, then similar target
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* devices manufactured by PJRC.COM must be included in the list of
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* target devices and selectable in the same manner.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef USBserial_h_
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#define USBserial_h_
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#include "usb_desc.h"
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#if (defined(CDC_STATUS_INTERFACE) && defined(CDC_DATA_INTERFACE)) || defined(USB_DISABLED)
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#include <inttypes.h>
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#if F_CPU >= 20000000 && !defined(USB_DISABLED)
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// C language implementation
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#ifdef __cplusplus
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extern "C" {
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#endif
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int usb_serial_getchar(void);
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int usb_serial_peekchar(void);
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int usb_serial_available(void);
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int usb_serial_read(void *buffer, uint32_t size);
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void usb_serial_flush_input(void);
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int usb_serial_putchar(uint8_t c);
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int usb_serial_write(const void *buffer, uint32_t size);
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int usb_serial_write_buffer_free(void);
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void usb_serial_flush_output(void);
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extern uint32_t usb_cdc_line_coding[2];
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extern volatile uint32_t usb_cdc_line_rtsdtr_millis;
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extern volatile uint32_t systick_millis_count;
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extern volatile uint8_t usb_cdc_line_rtsdtr;
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extern volatile uint8_t usb_cdc_transmit_flush_timer;
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extern volatile uint8_t usb_configuration;
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#ifdef __cplusplus
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}
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#endif
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#define USB_SERIAL_DTR 0x01
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#define USB_SERIAL_RTS 0x02
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// C++ interface
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#ifdef __cplusplus
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#include "Stream.h"
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class usb_serial_class : public Stream
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{
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public:
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constexpr usb_serial_class() {}
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void begin(long) {
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//uint32_t millis_begin = systick_millis_count;
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//disabled for now - causes more trouble than it solves?
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//while (!(*this)) {
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// wait up to 2.5 seconds for Arduino Serial Monitor
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// Yes, this is a long time, but some Windows systems open
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// the port very slowly. This wait allows programs for
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// Arduino Uno to "just work" (without forcing a reboot when
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// the port is opened), and when no PC is connected the user's
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// sketch still gets to run normally after this wait time.
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//if ((uint32_t)(systick_millis_count - millis_begin) > 2500) break;
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//}
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}
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void end() { /* TODO: flush output and shut down USB port */ };
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virtual int available() { return usb_serial_available(); }
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virtual int read() { return usb_serial_getchar(); }
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virtual int peek() { return usb_serial_peekchar(); }
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virtual void flush() { usb_serial_flush_output(); } // TODO: actually wait for data to leave USB...
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virtual void clear(void) { usb_serial_flush_input(); }
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virtual size_t write(uint8_t c) { return usb_serial_putchar(c); }
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virtual size_t write(const uint8_t *buffer, size_t size) { return usb_serial_write(buffer, size); }
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size_t write(unsigned long n) { return write((uint8_t)n); }
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size_t write(long n) { return write((uint8_t)n); }
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size_t write(unsigned int n) { return write((uint8_t)n); }
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size_t write(int n) { return write((uint8_t)n); }
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virtual int availableForWrite() { return usb_serial_write_buffer_free(); }
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using Print::write;
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void send_now(void) { usb_serial_flush_output(); }
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uint32_t baud(void) { return usb_cdc_line_coding[0]; }
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uint8_t stopbits(void) { uint8_t b = usb_cdc_line_coding[1]; if (!b) b = 1; return b; }
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uint8_t paritytype(void) { return usb_cdc_line_coding[1] >> 8; } // 0=none, 1=odd, 2=even
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uint8_t numbits(void) { return usb_cdc_line_coding[1] >> 16; }
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uint8_t dtr(void) { return (usb_cdc_line_rtsdtr & USB_SERIAL_DTR) ? 1 : 0; }
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uint8_t rts(void) { return (usb_cdc_line_rtsdtr & USB_SERIAL_RTS) ? 1 : 0; }
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operator bool() { return usb_configuration && (usb_cdc_line_rtsdtr & USB_SERIAL_DTR) &&
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((uint32_t)(systick_millis_count - usb_cdc_line_rtsdtr_millis) >= 15);
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}
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size_t readBytes(char *buffer, size_t length) {
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size_t count=0;
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unsigned long startMillis = millis();
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do {
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count += usb_serial_read(buffer + count, length - count);
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if (count >= length) return count;
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} while(millis() - startMillis < _timeout);
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setReadError();
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return count;
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}
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};
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extern usb_serial_class Serial;
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extern void serialEvent(void);
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#endif // __cplusplus
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#else // F_CPU < 20000000
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// Allow Arduino programs using Serial to compile, but Serial will do nothing.
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#ifdef __cplusplus
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#include "Stream.h"
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class usb_serial_class : public Stream
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{
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public:
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constexpr usb_serial_class() {}
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void begin(long) { };
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void end() { };
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virtual int available() { return 0; }
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virtual int read() { return -1; }
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virtual int peek() { return -1; }
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virtual void flush() { }
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virtual void clear() { }
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virtual size_t write(uint8_t c) { return 1; }
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virtual size_t write(const uint8_t *buffer, size_t size) { return size; }
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size_t write(unsigned long n) { return 1; }
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size_t write(long n) { return 1; }
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size_t write(unsigned int n) { return 1; }
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size_t write(int n) { return 1; }
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int availableForWrite() { return 0; }
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using Print::write;
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void send_now(void) { }
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uint32_t baud(void) { return 0; }
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uint8_t stopbits(void) { return 1; }
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uint8_t paritytype(void) { return 0; }
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uint8_t numbits(void) { return 8; }
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uint8_t dtr(void) { return 1; }
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uint8_t rts(void) { return 1; }
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operator bool() { return true; }
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};
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extern usb_serial_class Serial;
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extern void serialEvent(void);
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#endif // __cplusplus
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#endif // F_CPU
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#endif // CDC_STATUS_INTERFACE && CDC_DATA_INTERFACE
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#endif // USBserial_h_
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