Altered the CDC Deivice and Host Class drivers' receive byte routines, so that no data is indicated by a negative return value.

Added auto flushing of OUT data to the CDC Host Class driver's USBTask function to automatically flush the send pipe buffer.
pull/1469/head
Dean Camera 14 years ago
parent 7c8d16fd7a
commit 24e621a8d8

@ -101,12 +101,12 @@ int main(void)
CheckJoystickMovement(); CheckJoystickMovement();
/* Discard all received data on the first CDC interface */ /* Discard all received data on the first CDC interface */
while (CDC_Device_BytesReceived(&VirtualSerial1_CDC_Interface))
CDC_Device_ReceiveByte(&VirtualSerial1_CDC_Interface); CDC_Device_ReceiveByte(&VirtualSerial1_CDC_Interface);
/* Echo all received data on the second CDC interface */ /* Echo all received data on the second CDC interface */
while (CDC_Device_BytesReceived(&VirtualSerial2_CDC_Interface)) int16_t ReceivedByte; = CDC_Device_ReceiveByte(&VirtualSerial2_CDC_Interface);
CDC_Device_SendByte(&VirtualSerial2_CDC_Interface, CDC_Device_ReceiveByte(&VirtualSerial2_CDC_Interface)); if (!(ReceivedByte < 0))
CDC_Device_SendByte(&VirtualSerial2_CDC_Interface, (uint8_t)ReceivedByte);
CDC_Device_USBTask(&VirtualSerial1_CDC_Interface); CDC_Device_USBTask(&VirtualSerial1_CDC_Interface);
CDC_Device_USBTask(&VirtualSerial2_CDC_Interface); CDC_Device_USBTask(&VirtualSerial2_CDC_Interface);

@ -83,7 +83,6 @@ int main(void)
CheckJoystickMovement(); CheckJoystickMovement();
/* Must throw away unused bytes from the host, or it will lock up while waiting for the device */ /* Must throw away unused bytes from the host, or it will lock up while waiting for the device */
while (CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface))
CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface); CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
CDC_Device_USBTask(&VirtualSerial_CDC_Interface); CDC_Device_USBTask(&VirtualSerial_CDC_Interface);

@ -97,7 +97,6 @@ int main(void)
CheckJoystickMovement(); CheckJoystickMovement();
/* Must throw away unused bytes from the host, or it will lock up while waiting for the device */ /* Must throw away unused bytes from the host, or it will lock up while waiting for the device */
while (CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface))
CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface); CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
CDC_Device_USBTask(&VirtualSerial_CDC_Interface); CDC_Device_USBTask(&VirtualSerial_CDC_Interface);

@ -111,10 +111,9 @@ int main(void)
if (CDC_Host_BytesReceived(&VirtualSerial_CDC_Interface)) if (CDC_Host_BytesReceived(&VirtualSerial_CDC_Interface))
{ {
/* Echo received bytes from the attached device through the USART */ /* Echo received bytes from the attached device through the USART */
while (CDC_Host_BytesReceived(&VirtualSerial_CDC_Interface)) int16_t ReceivedByte = CDC_Host_ReceiveByte(&VirtualSerial_CDC_Interface);
putchar(CDC_Host_ReceiveByte(&VirtualSerial_CDC_Interface)); if (!(ReceivedByte < 0))
putchar(ReceivedByte);
CDC_Host_Flush(&VirtualSerial_CDC_Interface);
} }
break; break;

@ -129,11 +129,6 @@ void CDC_Device_USBTask(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS)) if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
return; return;
Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
if (Endpoint_IsOUTReceived() && !(Endpoint_BytesInEndpoint()))
Endpoint_ClearOUT();
CDC_Device_Flush(CDCInterfaceInfo); CDC_Device_Flush(CDCInterfaceInfo);
} }
@ -222,19 +217,24 @@ uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterface
} }
} }
uint8_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) int16_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
{ {
uint8_t ReceivedByte = -1;
if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS)) if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
return 0; return 0;
Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber); Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
uint8_t DataByte = Endpoint_Read_Byte(); if (!(Endpoint_IsOUTReceived()))
return -1;
else if (Endpoint_BytesInEndpoint())
ReceivedByte = Endpoint_Read_Byte();
if (!(Endpoint_BytesInEndpoint())) if (!(Endpoint_BytesInEndpoint()))
Endpoint_ClearOUT(); Endpoint_ClearOUT();
return DataByte; return ReceivedByte;
} }
void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
@ -282,15 +282,19 @@ static int CDC_Device_putchar(char c,
static int CDC_Device_getchar(FILE* Stream) static int CDC_Device_getchar(FILE* Stream)
{ {
if (!(CDC_Device_BytesReceived((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream)))) int16_t ReceivedByte = CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));
if (ReceivedByte < 0)
return _FDEV_EOF; return _FDEV_EOF;
return CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream)); return ReceivedByte;
} }
static int CDC_Device_getchar_Blocking(FILE* Stream) static int CDC_Device_getchar_Blocking(FILE* Stream)
{ {
while (!(CDC_Device_BytesReceived((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream)))) int16_t ReceivedByte;
while ((ReceivedByte = CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream))) < 0)
{ {
if (USB_DeviceState == DEVICE_STATE_Unattached) if (USB_DeviceState == DEVICE_STATE_Unattached)
return _FDEV_EOF; return _FDEV_EOF;
@ -299,7 +303,7 @@ static int CDC_Device_getchar_Blocking(FILE* Stream)
USB_USBTask(); USB_USBTask();
} }
return CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream)); return ReceivedByte;
} }
#endif #endif

@ -233,7 +233,10 @@
uint8_t CDC_Device_SendByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, uint8_t CDC_Device_SendByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo,
const uint8_t Data) ATTR_NON_NULL_PTR_ARG(1); const uint8_t Data) ATTR_NON_NULL_PTR_ARG(1);
/** Determines the number of bytes received by the CDC interface from the host, waiting to be read. /** Determines the number of bytes received by the CDC interface from the host, waiting to be read. This indicates the number
* of bytes in the OUT endpoint bank only, and thus the number of calls to \ref CDC_Device_ReceiveByte() which are guaranteed to
* succeed immediately. If multiple bytes are to be received, they should be buffered by the user application, as the endpoint
* bank will not be released back to the USB controller until all bytes are read.
* *
* \pre This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or * \pre This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
* the call will fail. * the call will fail.
@ -245,17 +248,18 @@
uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
/** Reads a byte of data from the host. If no data is waiting to be read of if a USB host is not connected, the function /** Reads a byte of data from the host. If no data is waiting to be read of if a USB host is not connected, the function
* returns 0. The \ref CDC_Device_BytesReceived() function should be queried before data is received to ensure that no data * returns a negative value. The \ref CDC_Device_BytesReceived() function may be queried in advance to determine how many
* underflow occurs. * bytes are currently buffered in the CDC interface's data receive endpoint bank, and thus how many repeated calls to this
* function which are guaranteed to succeed.
* *
* \pre This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or * \pre This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
* the call will fail. * the call will fail.
* *
* \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state. * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
* *
* \return Next received byte from the host, or 0 if no data received. * \return Next received byte from the host, or a negative value if no data received.
*/ */
uint8_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); int16_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
/** Flushes any data waiting to be sent, ensuring that the send buffer is cleared. /** Flushes any data waiting to be sent, ensuring that the send buffer is cleared.
* *

@ -220,14 +220,19 @@ void CDC_Host_USBTask(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
sizeof(CDCInterfaceInfo->State.ControlLineStates.DeviceToHost), sizeof(CDCInterfaceInfo->State.ControlLineStates.DeviceToHost),
NO_STREAM_CALLBACK); NO_STREAM_CALLBACK);
}
Pipe_ClearIN(); Pipe_ClearIN();
EVENT_CDC_Host_ControLineStateChanged(CDCInterfaceInfo); EVENT_CDC_Host_ControLineStateChanged(CDCInterfaceInfo);
} }
else
{
Pipe_ClearIN();
}
}
Pipe_Freeze(); Pipe_Freeze();
CDC_Host_Flush(CDCInterfaceInfo);
} }
uint8_t CDC_Host_SetLineEncoding(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo) uint8_t CDC_Host_SetLineEncoding(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
@ -353,9 +358,9 @@ uint16_t CDC_Host_BytesReceived(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo
} }
} }
uint8_t CDC_Host_ReceiveByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo) int16_t CDC_Host_ReceiveByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
{ {
uint8_t ReceivedByte = 0; uint8_t ReceivedByte = -1;
if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive)) if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
return 0; return 0;
@ -364,6 +369,9 @@ uint8_t CDC_Host_ReceiveByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
Pipe_SetPipeToken(PIPE_TOKEN_IN); Pipe_SetPipeToken(PIPE_TOKEN_IN);
Pipe_Unfreeze(); Pipe_Unfreeze();
if (!(Pipe_IsINReceived()))
return -1;
else if (Pipe_BytesInPipe())
ReceivedByte = Pipe_Read_Byte(); ReceivedByte = Pipe_Read_Byte();
if (!(Pipe_BytesInPipe())) if (!(Pipe_BytesInPipe()))
@ -426,15 +434,19 @@ static int CDC_Host_putchar(char c,
static int CDC_Host_getchar(FILE* Stream) static int CDC_Host_getchar(FILE* Stream)
{ {
if (!(CDC_Host_BytesReceived((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream)))) int16_t ReceivedByte = CDC_Host_ReceiveByte((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream));
if (ReceivedByte < 0)
return _FDEV_EOF; return _FDEV_EOF;
return CDC_Host_ReceiveByte((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream)); return ReceivedByte;
} }
static int CDC_Host_getchar_Blocking(FILE* Stream) static int CDC_Host_getchar_Blocking(FILE* Stream)
{ {
while (!(CDC_Host_BytesReceived((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream)))) int16_t ReceivedByte;
while ((ReceivedByte = CDC_Host_ReceiveByte((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream))) < 0)
{ {
if (USB_HostState == HOST_STATE_Unattached) if (USB_HostState == HOST_STATE_Unattached)
return _FDEV_EOF; return _FDEV_EOF;
@ -443,7 +455,7 @@ static int CDC_Host_getchar_Blocking(FILE* Stream)
USB_USBTask(); USB_USBTask();
} }
return CDC_Host_ReceiveByte((USB_ClassInfo_CDC_Host_t*)fdev_get_udata(Stream)); return ReceivedByte;
} }
void CDC_Host_Event_Stub(void) void CDC_Host_Event_Stub(void)

@ -236,7 +236,10 @@
uint8_t CDC_Host_SendByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo, uint8_t CDC_Host_SendByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
const uint8_t Data) ATTR_NON_NULL_PTR_ARG(1); const uint8_t Data) ATTR_NON_NULL_PTR_ARG(1);
/** Determines the number of bytes received by the CDC interface from the device, waiting to be read. /** Determines the number of bytes received by the CDC interface from the device, waiting to be read. This indicates the number
* of bytes in the IN pipe bank only, and thus the number of calls to \ref CDC_Host_ReceiveByte() which are guaranteed to succeed
* immediately. If multiple bytes are to be received, they should be buffered by the user application, as the pipe bank will not be
* released back to the USB controller until all bytes are read.
* *
* \pre This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the * \pre This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
* call will fail. * call will fail.
@ -248,17 +251,17 @@
uint16_t CDC_Host_BytesReceived(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); uint16_t CDC_Host_BytesReceived(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
/** Reads a byte of data from the device. If no data is waiting to be read of if a USB device is not connected, the function /** Reads a byte of data from the device. If no data is waiting to be read of if a USB device is not connected, the function
* returns 0. The \ref CDC_Host_BytesReceived() function should be queried before data is received to ensure that no data * returns a negative value. The \ref CDC_Host_BytesReceived() function may be queried in advance to determine how many bytes
* underflow occurs. * are currently buffered in the CDC interface's data receive pipe.
* *
* \pre This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the * \pre This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the
* call will fail. * call will fail.
* *
* \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class host configuration and state. * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class host configuration and state.
* *
* \return Next received byte from the device, or 0 if no data received. * \return Next received byte from the device, or a negative value if no data received.
*/ */
uint8_t CDC_Host_ReceiveByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); int16_t CDC_Host_ReceiveByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
/** Flushes any data waiting to be sent, ensuring that the send buffer is cleared. /** Flushes any data waiting to be sent, ensuring that the send buffer is cleared.
* *

@ -41,6 +41,8 @@
* - Internal USB driver source files renamed and moved to ease future possible architecture ports * - Internal USB driver source files renamed and moved to ease future possible architecture ports
* - All internal pseudo-function macros have been converted to true inline functions for type-safety and readability * - All internal pseudo-function macros have been converted to true inline functions for type-safety and readability
* - Changed LED indicator masks for the AVRISP-MKII project, so that there are defined roles for each LED * - Changed LED indicator masks for the AVRISP-MKII project, so that there are defined roles for each LED
* - Altered the CDC Deivice and Host Class drivers' receive byte routines, so that no data is indicated by a negative return value
* - Added auto flushing of OUT data to the CDC Host Class driver's USBTask function to automatically flush the send pipe buffer
* *
* <b>Fixed:</b> * <b>Fixed:</b>
* - Fixed AVRISP project sending a LOAD EXTENDED ADDRESS command to 128KB AVRs after programming or reading from * - Fixed AVRISP project sending a LOAD EXTENDED ADDRESS command to 128KB AVRs after programming or reading from

@ -32,6 +32,16 @@
* enhanced \ref USB_Device_SendRemoteWakeup() function. Existing code may now discard any checks to USB_Device_IsRemoteWakeupSent(). * enhanced \ref USB_Device_SendRemoteWakeup() function. Existing code may now discard any checks to USB_Device_IsRemoteWakeupSent().
* - The USB_Device_IsUSBSuspended() macro has been removed, as it is obsolete. Existing code should compare \ref USB_DeviceState * - The USB_Device_IsUSBSuspended() macro has been removed, as it is obsolete. Existing code should compare \ref USB_DeviceState
* to see if it the device is in the \ref DEVICE_STATE_Suspended state instead. * to see if it the device is in the \ref DEVICE_STATE_Suspended state instead.
* - The \ref CDC_Device_ReceiveByte() function has changed, and now returns a signed 16-bit integer, with -1 indicating no data was
* received. This allows for more efficient coding, as a call to \ref CDC_Device_BytesReceived() is no longer needed if the exact
* number of queued bytes received is not needed.
*
* <b>Host Mode</b>
* - The \ref CDC_Host_ReceiveByte() function has changed, and now returns a signed 16-bit integer, with -1 indicating no data was
* received. This allows for more efficient coding, as a call to \ref CDC_Device_BytesReceived() is no longer needed if the exact
* number of queued bytes received is not needed.
* - The \ref CDC_Host_USBTask() now calls \ref CDC_Host_Flush() automatically, flushing any queued data to the attached device. Manual
* flushing of the interface is no longer needed if the flushes should be in sync with calls to \ref CDC_Host_USBTask().
* *
* \section Sec_Migration100513 Migrating from 100219 to 100513 * \section Sec_Migration100513 Migrating from 100219 to 100513
* *

@ -92,9 +92,10 @@ int main(void)
for (;;) for (;;)
{ {
/* Echo bytes from the host to the target via the hardware USART */ /* Echo bytes from the host to the target via the hardware USART */
if (CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface) && (UCSR1A & (1 << UDRE1))) int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
if (!(ReceivedByte < 0) && (UCSR1A & (1 << UDRE1)))
{ {
UDR1 = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface); UDR1 = ReceivedByte;
LEDs_TurnOnLEDs(LEDMASK_TX); LEDs_TurnOnLEDs(LEDMASK_TX);
PulseMSRemaining.TxLEDPulse = TX_RX_LED_PULSE_MS; PulseMSRemaining.TxLEDPulse = TX_RX_LED_PULSE_MS;

@ -82,13 +82,9 @@ int main(void)
for (;;) for (;;)
{ {
/* Read bytes from the USB OUT endpoint into the USART transmit buffer */ /* Read bytes from the USB OUT endpoint into the USART transmit buffer */
for (uint8_t DataBytesRem = CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface); DataBytesRem != 0; DataBytesRem--) int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
{ if (!(ReceivedByte < 0) && !(RingBuffer_IsFull(&USBtoUSART_Buffer)))
if (RingBuffer_IsFull(&USBtoUSART_Buffer)) RingBuffer_AtomicInsert(&USBtoUSART_Buffer, (uint8_t)ReceivedByte);
break;
RingBuffer_AtomicInsert(&USBtoUSART_Buffer, CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface));
}
/* Check if the software USART flush timer has expired */ /* Check if the software USART flush timer has expired */
if (TIFR0 & (1 << TOV0)) if (TIFR0 & (1 << TOV0))

@ -120,7 +120,8 @@ void UARTBridge_Task(void)
return; return;
/* Read bytes from the USB OUT endpoint into the UART transmit buffer */ /* Read bytes from the USB OUT endpoint into the UART transmit buffer */
if (CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface) && !(RingBuffer_IsFull(&USBtoUART_Buffer))) int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
if (!(ReceivedByte < 0) && !(RingBuffer_IsFull(&USBtoUART_Buffer)))
RingBuffer_AtomicInsert(&USBtoUART_Buffer, CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface)); RingBuffer_AtomicInsert(&USBtoUART_Buffer, CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface));
/* Check if the software UART flush timer has expired */ /* Check if the software UART flush timer has expired */

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