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Diffstat (limited to 'cores/robot/CDC.cpp')
| -rw-r--r-- | cores/robot/CDC.cpp | 239 |
1 files changed, 0 insertions, 239 deletions
diff --git a/cores/robot/CDC.cpp b/cores/robot/CDC.cpp deleted file mode 100644 index 701e483..0000000 --- a/cores/robot/CDC.cpp +++ /dev/null @@ -1,239 +0,0 @@ - - -/* Copyright (c) 2011, Peter Barrett -** -** Permission to use, copy, modify, and/or distribute this software for -** any purpose with or without fee is hereby granted, provided that the -** above copyright notice and this permission notice appear in all copies. -** -** THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL -** WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED -** WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR -** BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES -** OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, -** WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, -** ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS -** SOFTWARE. -*/ - -#include "Platform.h" -#include "USBAPI.h" -#include <avr/wdt.h> - -#if defined(USBCON) -#ifdef CDC_ENABLED - -#if (RAMEND < 1000) -#define SERIAL_BUFFER_SIZE 16 -#else -#define SERIAL_BUFFER_SIZE 64 -#endif - -struct ring_buffer -{ - unsigned char buffer[SERIAL_BUFFER_SIZE]; - volatile int head; - volatile int tail; -}; - -ring_buffer cdc_rx_buffer = { { 0 }, 0, 0}; - -typedef struct -{ - u32 dwDTERate; - u8 bCharFormat; - u8 bParityType; - u8 bDataBits; - u8 lineState; -} LineInfo; - -static volatile LineInfo _usbLineInfo = { 57600, 0x00, 0x00, 0x00, 0x00 }; - -#define WEAK __attribute__ ((weak)) - -extern const CDCDescriptor _cdcInterface PROGMEM; -const CDCDescriptor _cdcInterface = -{ - D_IAD(0,2,CDC_COMMUNICATION_INTERFACE_CLASS,CDC_ABSTRACT_CONTROL_MODEL,1), - - // CDC communication interface - D_INTERFACE(CDC_ACM_INTERFACE,1,CDC_COMMUNICATION_INTERFACE_CLASS,CDC_ABSTRACT_CONTROL_MODEL,0), - D_CDCCS(CDC_HEADER,0x10,0x01), // Header (1.10 bcd) - D_CDCCS(CDC_CALL_MANAGEMENT,1,1), // Device handles call management (not) - D_CDCCS4(CDC_ABSTRACT_CONTROL_MANAGEMENT,6), // SET_LINE_CODING, GET_LINE_CODING, SET_CONTROL_LINE_STATE supported - D_CDCCS(CDC_UNION,CDC_ACM_INTERFACE,CDC_DATA_INTERFACE), // Communication interface is master, data interface is slave 0 - D_ENDPOINT(USB_ENDPOINT_IN (CDC_ENDPOINT_ACM),USB_ENDPOINT_TYPE_INTERRUPT,0x10,0x40), - - // CDC data interface - D_INTERFACE(CDC_DATA_INTERFACE,2,CDC_DATA_INTERFACE_CLASS,0,0), - D_ENDPOINT(USB_ENDPOINT_OUT(CDC_ENDPOINT_OUT),USB_ENDPOINT_TYPE_BULK,0x40,0), - D_ENDPOINT(USB_ENDPOINT_IN (CDC_ENDPOINT_IN ),USB_ENDPOINT_TYPE_BULK,0x40,0) -}; - -int WEAK CDC_GetInterface(u8* interfaceNum) -{ - interfaceNum[0] += 2; // uses 2 - return USB_SendControl(TRANSFER_PGM,&_cdcInterface,sizeof(_cdcInterface)); -} - -bool WEAK CDC_Setup(Setup& setup) -{ - u8 r = setup.bRequest; - u8 requestType = setup.bmRequestType; - - if (REQUEST_DEVICETOHOST_CLASS_INTERFACE == requestType) - { - if (CDC_GET_LINE_CODING == r) - { - USB_SendControl(0,(void*)&_usbLineInfo,7); - return true; - } - } - - if (REQUEST_HOSTTODEVICE_CLASS_INTERFACE == requestType) - { - if (CDC_SET_LINE_CODING == r) - { - USB_RecvControl((void*)&_usbLineInfo,7); - return true; - } - - if (CDC_SET_CONTROL_LINE_STATE == r) - { - _usbLineInfo.lineState = setup.wValueL; - - // 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; - } - } - return true; - } - } - return false; -} - - -int _serialPeek = -1; -void Serial_::begin(uint16_t baud_count) -{ -} - -void Serial_::end(void) -{ -} - -void Serial_::accept(void) -{ - ring_buffer *buffer = &cdc_rx_buffer; - int i = (unsigned int)(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 != buffer->tail) { - int c = USB_Recv(CDC_RX); - if (c == -1) - break; // no more data - buffer->buffer[buffer->head] = c; - buffer->head = i; - - i = (unsigned int)(buffer->head+1) % SERIAL_BUFFER_SIZE; - } -} - -int Serial_::available(void) -{ - ring_buffer *buffer = &cdc_rx_buffer; - return (unsigned int)(SERIAL_BUFFER_SIZE + buffer->head - buffer->tail) % SERIAL_BUFFER_SIZE; -} - -int Serial_::peek(void) -{ - ring_buffer *buffer = &cdc_rx_buffer; - if (buffer->head == buffer->tail) { - return -1; - } else { - return buffer->buffer[buffer->tail]; - } -} - -int Serial_::read(void) -{ - ring_buffer *buffer = &cdc_rx_buffer; - // if the head isn't ahead of the tail, we don't have any characters - if (buffer->head == buffer->tail) { - return -1; - } else { - unsigned char c = buffer->buffer[buffer->tail]; - buffer->tail = (unsigned int)(buffer->tail + 1) % SERIAL_BUFFER_SIZE; - return c; - } -} - -void Serial_::flush(void) -{ - USB_Flush(CDC_TX); -} - -size_t Serial_::write(uint8_t c) -{ - /* 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. - bytes sent before the user opens the connection or after - the connection is closed are lost - just like with a UART. */ - - // TODO - ZE - check behavior on different OSes and test what happens if an - // 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); - if (r > 0) { - return r; - } else { - setWriteError(); - return 0; - } - } - setWriteError(); - return 0; -} - -// This operator is a convenient way for a sketch to check whether the -// port has actually been configured and opened by the host (as opposed -// to just being connected to the host). It can be used, for example, in -// setup() before printing to ensure that an application on the host is -// actually ready to receive and display the data. -// We add a short delay before returning to fix a bug observed by Federico -// where the port is configured (lineState != 0) but not quite opened. -Serial_::operator bool() { - bool result = false; - if (_usbLineInfo.lineState > 0) - result = true; - delay(10); - return result; -} - -Serial_ Serial; - -#endif -#endif /* if defined(USBCON) */ |