/* Teensyduino Core Library * http://www.pjrc.com/teensy/ * Copyright (c) 2017 PJRC.COM, LLC. * * 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: * * 1. The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * 2. If the Software is incorporated into a build system that allows * selection among a list of target devices, then similar target * devices manufactured by PJRC.COM must be included in the list of * target devices and selectable in the same manner. * * 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. */ #ifndef USBserial_h_ #define USBserial_h_ #include "usb_desc.h" #if (defined(CDC_STATUS_INTERFACE) && defined(CDC_DATA_INTERFACE)) || defined(USB_DISABLED) #include #if F_CPU >= 20000000 && !defined(USB_DISABLED) // C language implementation #ifdef __cplusplus extern "C" { #endif int usb_serial_getchar(void); int usb_serial_peekchar(void); int usb_serial_available(void); int usb_serial_read(void *buffer, uint32_t size); void usb_serial_flush_input(void); int usb_serial_putchar(uint8_t c); int usb_serial_write(const void *buffer, uint32_t size); int usb_serial_write_buffer_free(void); void usb_serial_flush_output(void); extern uint32_t usb_cdc_line_coding[2]; extern volatile uint32_t usb_cdc_line_rtsdtr_millis; extern volatile uint32_t systick_millis_count; extern volatile uint8_t usb_cdc_line_rtsdtr; extern volatile uint8_t usb_cdc_transmit_flush_timer; extern volatile uint8_t usb_configuration; #ifdef __cplusplus } #endif #define USB_SERIAL_DTR 0x01 #define USB_SERIAL_RTS 0x02 // C++ interface #ifdef __cplusplus #include "Stream.h" class usb_serial_class : public Stream { public: constexpr usb_serial_class() {} void begin(long) { uint32_t millis_begin = systick_millis_count; while (!(*this)) { // wait up to 2.5 seconds for Arduino Serial Monitor // Yes, this is a long time, but some Windows systems open // the port very slowly. This wait allows programs for // Arduino Uno to "just work" (without forcing a reboot when // the port is opened), and when no PC is connected the user's // sketch still gets to run normally after this wait time. if ((uint32_t)(systick_millis_count - millis_begin) > 2500) break; } } void end() { /* TODO: flush output and shut down USB port */ }; virtual int available() { return usb_serial_available(); } virtual int read() { return usb_serial_getchar(); } virtual int peek() { return usb_serial_peekchar(); } virtual void flush() { usb_serial_flush_output(); } // TODO: actually wait for data to leave USB... virtual void clear(void) { usb_serial_flush_input(); } virtual size_t write(uint8_t c) { return usb_serial_putchar(c); } virtual size_t write(const uint8_t *buffer, size_t size) { return usb_serial_write(buffer, size); } size_t write(unsigned long n) { return write((uint8_t)n); } size_t write(long n) { return write((uint8_t)n); } size_t write(unsigned int n) { return write((uint8_t)n); } size_t write(int n) { return write((uint8_t)n); } virtual int availableForWrite() { return usb_serial_write_buffer_free(); } using Print::write; void send_now(void) { usb_serial_flush_output(); } uint32_t baud(void) { return usb_cdc_line_coding[0]; } uint8_t stopbits(void) { uint8_t b = usb_cdc_line_coding[1]; if (!b) b = 1; return b; } uint8_t paritytype(void) { return usb_cdc_line_coding[1] >> 8; } // 0=none, 1=odd, 2=even uint8_t numbits(void) { return usb_cdc_line_coding[1] >> 16; } uint8_t dtr(void) { return (usb_cdc_line_rtsdtr & USB_SERIAL_DTR) ? 1 : 0; } uint8_t rts(void) { return (usb_cdc_line_rtsdtr & USB_SERIAL_RTS) ? 1 : 0; } operator bool() { return usb_configuration && (usb_cdc_line_rtsdtr & (USB_SERIAL_DTR | USB_SERIAL_RTS)) && ((uint32_t)(systick_millis_count - usb_cdc_line_rtsdtr_millis) >= 25); } size_t readBytes(char *buffer, size_t length) { size_t count=0; unsigned long startMillis = millis(); do { count += usb_serial_read(buffer + count, length - count); if (count >= length) return count; } while(millis() - startMillis < _timeout); setReadError(); return count; } }; extern usb_serial_class Serial; extern void serialEvent(void); #endif // __cplusplus #else // F_CPU < 20000000 // Allow Arduino programs using Serial to compile, but Serial will do nothing. #ifdef __cplusplus #include "Stream.h" class usb_serial_class : public Stream { public: constexpr usb_serial_class() {} void begin(long) { }; void end() { }; virtual int available() { return 0; } virtual int read() { return -1; } virtual int peek() { return -1; } virtual void flush() { } virtual void clear() { } virtual size_t write(uint8_t c) { return 1; } virtual size_t write(const uint8_t *buffer, size_t size) { return size; } size_t write(unsigned long n) { return 1; } size_t write(long n) { return 1; } size_t write(unsigned int n) { return 1; } size_t write(int n) { return 1; } int availableForWrite() { return 0; } using Print::write; void send_now(void) { } uint32_t baud(void) { return 0; } uint8_t stopbits(void) { return 1; } uint8_t paritytype(void) { return 0; } uint8_t numbits(void) { return 8; } uint8_t dtr(void) { return 1; } uint8_t rts(void) { return 1; } operator bool() { return true; } }; extern usb_serial_class Serial; extern void serialEvent(void); #endif // __cplusplus #endif // F_CPU #endif // CDC_STATUS_INTERFACE && CDC_DATA_INTERFACE #endif // USBserial_h_