--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sanguino/cores/arduino/CDC.cpp Thu Jul 07 12:23:34 2016 +0200
@@ -0,0 +1,233 @@
+
+
+/* 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 c = USB_Recv(CDC_RX);
+ 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.
+ if (i != buffer->tail) {
+ buffer->buffer[buffer->head] = c;
+ buffer->head = i;
+ }
+}
+
+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) */