diff options
Diffstat (limited to 'cores/arduino/CDC.cpp')
| -rw-r--r-- | cores/arduino/CDC.cpp | 99 |
1 files changed, 43 insertions, 56 deletions
diff --git a/cores/arduino/CDC.cpp b/cores/arduino/CDC.cpp index a691306..5d4f2a0 100644 --- a/cores/arduino/CDC.cpp +++ b/cores/arduino/CDC.cpp @@ -16,7 +16,6 @@ ** SOFTWARE. */ -#include "Platform.h" #include "USBAPI.h" #include <avr/wdt.h> @@ -80,98 +79,81 @@ bool WEAK CDC_Setup(Setup& setup) if (CDC_SET_LINE_CODING == r) { USB_RecvControl((void*)&_usbLineInfo,7); - return true; } if (CDC_SET_CONTROL_LINE_STATE == r) { _usbLineInfo.lineState = setup.wValueL; + } + if (CDC_SET_LINE_CODING == r || CDC_SET_CONTROL_LINE_STATE == r) + { // auto-reset into the bootloader is triggered when the port, already // open at 1200 bps, is closed. this is the signal to start the watchdog // with a relatively long period so it can finish housekeeping tasks // like servicing endpoints before the sketch ends - if (1200 == _usbLineInfo.dwDTERate) { - // We check DTR state to determine if host port is open (bit 0 of lineState). - if ((_usbLineInfo.lineState & 0x01) == 0) { - *(uint16_t *)0x0800 = 0x7777; - wdt_enable(WDTO_120MS); - } else { - // Most OSs do some intermediate steps when configuring ports and DTR can - // twiggle more than once before stabilizing. - // To avoid spurious resets we set the watchdog to 250ms and eventually - // cancel if DTR goes back high. - - wdt_disable(); - wdt_reset(); - *(uint16_t *)0x0800 = 0x0; - } + + // We check DTR state to determine if host port is open (bit 0 of lineState). + if (1200 == _usbLineInfo.dwDTERate && (_usbLineInfo.lineState & 0x01) == 0) + { + *(uint16_t *)0x0800 = 0x7777; + wdt_enable(WDTO_120MS); + } + else + { + // Most OSs do some intermediate steps when configuring ports and DTR can + // twiggle more than once before stabilizing. + // To avoid spurious resets we set the watchdog to 250ms and eventually + // cancel if DTR goes back high. + + wdt_disable(); + wdt_reset(); + *(uint16_t *)0x0800 = 0x0; } - return true; } + return true; } return false; } -int _serialPeek = -1; -void Serial_::begin(unsigned long baud_count) +void Serial_::begin(unsigned long /* baud_count */) { + peek_buffer = -1; } -void Serial_::begin(unsigned long baud_count, byte config) +void Serial_::begin(unsigned long /* baud_count */, byte /* config */) { + peek_buffer = -1; } void Serial_::end(void) { } -void Serial_::accept(void) -{ - int i = (unsigned int)(_rx_buffer_head+1) % SERIAL_BUFFER_SIZE; - - // if we should be storing the received character into the location - // just before the tail (meaning that the head would advance to the - // current location of the tail), we're about to overflow the buffer - // and so we don't write the character or advance the head. - - // while we have room to store a byte - while (i != _rx_buffer_tail) { - int c = USB_Recv(CDC_RX); - if (c == -1) - break; // no more data - _rx_buffer[_rx_buffer_head] = c; - _rx_buffer_head = i; - - i = (unsigned int)(_rx_buffer_head+1) % SERIAL_BUFFER_SIZE; - } -} - int Serial_::available(void) { - return (unsigned int)(SERIAL_BUFFER_SIZE + _rx_buffer_head - _rx_buffer_tail) % SERIAL_BUFFER_SIZE; + if (peek_buffer >= 0) { + return 1 + USB_Available(CDC_RX); + } + return USB_Available(CDC_RX); } int Serial_::peek(void) { - if (_rx_buffer_head == _rx_buffer_tail) { - return -1; - } else { - return _rx_buffer[_rx_buffer_tail]; - } + if (peek_buffer < 0) + peek_buffer = USB_Recv(CDC_RX); + return peek_buffer; } int Serial_::read(void) { - // if the head isn't ahead of the tail, we don't have any characters - if (_rx_buffer_head == _rx_buffer_tail) { - return -1; - } else { - unsigned char c = _rx_buffer[_rx_buffer_tail]; - _rx_buffer_tail = (unsigned int)(_rx_buffer_tail + 1) % SERIAL_BUFFER_SIZE; + if (peek_buffer >= 0) { + int c = peek_buffer; + peek_buffer = -1; return c; - } + } + return USB_Recv(CDC_RX); } void Serial_::flush(void) @@ -181,6 +163,11 @@ void Serial_::flush(void) size_t Serial_::write(uint8_t c) { + return write(&c, 1); +} + +size_t Serial_::write(const uint8_t *buffer, size_t size) +{ /* only try to send bytes if the high-level CDC connection itself is open (not just the pipe) - the OS should set lineState when the port is opened and clear lineState when the port is closed. @@ -191,7 +178,7 @@ size_t Serial_::write(uint8_t c) // open connection isn't broken cleanly (cable is yanked out, host dies // or locks up, or host virtual serial port hangs) if (_usbLineInfo.lineState > 0) { - int r = USB_Send(CDC_TX,&c,1); + int r = USB_Send(CDC_TX,buffer,size); if (r > 0) { return r; } else { |