diff options
author | Jack Humbert <jack.humb@gmail.com> | 2017-07-07 17:55:23 +0200 |
---|---|---|
committer | Jack Humbert <jack.humb@gmail.com> | 2017-07-07 17:55:23 +0200 |
commit | 60b30c036397cb5627fa374bb930794b225daa29 (patch) | |
tree | e156c2d6b27f01db6985f2cc560c9c345d48fdac /Demos/Host/LowLevel/StillImageHost/Lib/StillImageCommands.c | |
download | qmk_firmware-60b30c036397cb5627fa374bb930794b225daa29.tar.gz qmk_firmware-60b30c036397cb5627fa374bb930794b225daa29.tar.xz |
Squashed 'lib/lufa/' content from commit 385d40300
git-subtree-dir: lib/lufa
git-subtree-split: 385d4030035dbaf41591309dbde47653bd03841b
Diffstat (limited to 'Demos/Host/LowLevel/StillImageHost/Lib/StillImageCommands.c')
-rw-r--r-- | Demos/Host/LowLevel/StillImageHost/Lib/StillImageCommands.c | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/Demos/Host/LowLevel/StillImageHost/Lib/StillImageCommands.c b/Demos/Host/LowLevel/StillImageHost/Lib/StillImageCommands.c new file mode 100644 index 000000000..d233e2770 --- /dev/null +++ b/Demos/Host/LowLevel/StillImageHost/Lib/StillImageCommands.c @@ -0,0 +1,268 @@ +/* + LUFA Library + Copyright (C) Dean Camera, 2017. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2017 Dean Camera (dean [at] fourwalledcubicle [dot] com) + + Permission to use, copy, modify, distribute, and sell this + software and its documentation for any purpose is hereby granted + without fee, provided that the above copyright notice appear in + all copies and that both that the copyright notice and this + permission notice and warranty disclaimer appear in supporting + documentation, and that the name of the author not be used in + advertising or publicity pertaining to distribution of the + software without specific, written prior permission. + + 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, 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. +*/ + +/** \file + * + * Still Image Device commands, to issue PIMA commands to the device for + * reading device status, capacity, and other characteristics as well as + * reading and writing of stored image data. + */ + +#include "StillImageCommands.h" + +/** PIMA block container for the block to send to the device */ +PIMA_Container_t PIMA_SendBlock; + +/** PIMA block container for the last received block from the device */ +PIMA_Container_t PIMA_ReceivedBlock; + +/** PIMA block container for the last event block received from the device */ +PIMA_Container_t PIMA_EventBlock; + + +/** Function to send the PIMA command container to the attached still image device. */ +void SImage_SendBlockHeader(void) +{ + /* Unfreeze the data OUT pipe ready for data transmission */ + Pipe_SelectPipe(SIMAGE_DATA_OUT_PIPE); + Pipe_Unfreeze(); + + /* Write the PIMA block to the data OUT pipe */ + Pipe_Write_Stream_LE(&PIMA_SendBlock, PIMA_COMMAND_SIZE(0), NULL); + + /* If the block type is a command, send its parameters (if any) */ + if (PIMA_SendBlock.Type == PIMA_CONTAINER_CommandBlock) + { + /* Determine the size of the parameters in the block via the data length attribute */ + uint8_t ParamBytes = (PIMA_SendBlock.DataLength - PIMA_COMMAND_SIZE(0)); + + /* Check if any parameters in the command block */ + if (ParamBytes) + { + /* Write the PIMA parameters to the data OUT pipe */ + Pipe_Write_Stream_LE(&PIMA_SendBlock.Params, ParamBytes, NULL); + } + + /* Send the PIMA command block to the attached device */ + Pipe_ClearOUT(); + } + + /* Freeze pipe after use */ + Pipe_Freeze(); +} + +/** Function to receive a PIMA event container from the attached still image device. + * + * \return A value from the Pipe_Stream_RW_ErrorCodes_t enum + */ +uint8_t SImage_ReceiveEventHeader(void) +{ + uint8_t ErrorCode; + + /* Unfreeze the events pipe */ + Pipe_SelectPipe(SIMAGE_EVENTS_PIPE); + Pipe_Unfreeze(); + + /* Read in the event data into the global structure */ + ErrorCode = Pipe_Read_Stream_LE(&PIMA_EventBlock, sizeof(PIMA_EventBlock), NULL); + + /* Clear the pipe after read complete to prepare for next event */ + Pipe_ClearIN(); + + /* Freeze the event pipe again after use */ + Pipe_Freeze(); + + return ErrorCode; +} + +/** Function to receive a PIMA response container from the attached still image device. + * + * \return A value from the Pipe_Stream_RW_ErrorCodes_t enum + */ +uint8_t SImage_ReceiveBlockHeader(void) +{ + uint16_t TimeoutMSRem = COMMAND_DATA_TIMEOUT_MS; + uint16_t PreviousFrameNumber = USB_Host_GetFrameNumber(); + + /* Unfreeze the data IN pipe */ + Pipe_SelectPipe(SIMAGE_DATA_IN_PIPE); + Pipe_Unfreeze(); + + /* Wait until data received on the IN pipe */ + while (!(Pipe_IsINReceived())) + { + uint16_t CurrentFrameNumber = USB_Host_GetFrameNumber(); + + /* Check to see if a new frame has been issued (1ms elapsed) */ + if (CurrentFrameNumber != PreviousFrameNumber) + { + /* Save the new frame number and decrement the timeout period */ + PreviousFrameNumber = CurrentFrameNumber; + TimeoutMSRem--; + + /* Check to see if the timeout period for the command has elapsed */ + if (!(TimeoutMSRem)) + return PIPE_RWSTREAM_Timeout; + } + + Pipe_Freeze(); + Pipe_SelectPipe(SIMAGE_DATA_OUT_PIPE); + Pipe_Unfreeze(); + + /* Check if pipe stalled (command failed by device) */ + if (Pipe_IsStalled()) + { + /* Clear the stall condition on the OUT pipe */ + USB_Host_ClearEndpointStall(Pipe_GetBoundEndpointAddress()); + + /* Return error code and break out of the loop */ + return PIPE_RWSTREAM_PipeStalled; + } + + Pipe_Freeze(); + Pipe_SelectPipe(SIMAGE_DATA_IN_PIPE); + Pipe_Unfreeze(); + + /* Check if pipe stalled (command failed by device) */ + if (Pipe_IsStalled()) + { + /* Clear the stall condition on the IN pipe */ + USB_Host_ClearEndpointStall(Pipe_GetBoundEndpointAddress()); + + /* Return error code */ + return PIPE_RWSTREAM_PipeStalled; + } + + /* Check to see if the device was disconnected, if so exit function */ + if (USB_HostState == HOST_STATE_Unattached) + return PIPE_RWSTREAM_DeviceDisconnected; + } + + /* Load in the response from the attached device */ + Pipe_Read_Stream_LE(&PIMA_ReceivedBlock, PIMA_COMMAND_SIZE(0), NULL); + + /* Check if the returned block type is a response block */ + if (PIMA_ReceivedBlock.Type == PIMA_CONTAINER_ResponseBlock) + { + /* Determine the size of the parameters in the block via the data length attribute */ + uint8_t ParamBytes = (PIMA_ReceivedBlock.DataLength - PIMA_COMMAND_SIZE(0)); + + /* Check if the device has returned any parameters */ + if (ParamBytes) + { + /* Read the PIMA parameters from the data IN pipe */ + Pipe_Read_Stream_LE(&PIMA_ReceivedBlock.Params, ParamBytes, NULL); + } + + /* Clear pipe bank after use */ + Pipe_ClearIN(); + } + + /* Freeze the IN pipe after use */ + Pipe_Freeze(); + + return PIPE_RWSTREAM_NoError; +} + +/** Function to send the given data to the device, after a command block has been issued. + * + * \param[in] Buffer Source data buffer to send to the device + * \param[in] Bytes Number of bytes to send + * + * \return A value from the Pipe_Stream_RW_ErrorCodes_t enum + */ +uint8_t SImage_SendData(void* const Buffer, + const uint16_t Bytes) +{ + uint8_t ErrorCode; + + /* Unfreeze the data OUT pipe */ + Pipe_SelectPipe(SIMAGE_DATA_OUT_PIPE); + Pipe_Unfreeze(); + + /* Write the data contents to the pipe */ + ErrorCode = Pipe_Write_Stream_LE(Buffer, Bytes, NULL); + + /* Send the last packet to the attached device */ + Pipe_ClearOUT(); + + /* Freeze the pipe again after use */ + Pipe_Freeze(); + + return ErrorCode; +} + +/** Function to receive the given data from the device, after a response block has been received. + * + * \param[out] Buffer Destination data buffer to put read bytes from the device + * \param[in] Bytes Number of bytes to receive + * + * \return A value from the Pipe_Stream_RW_ErrorCodes_t enum + */ +uint8_t SImage_ReadData(void* const Buffer, + const uint16_t Bytes) +{ + uint8_t ErrorCode; + + /* Unfreeze the data IN pipe */ + Pipe_SelectPipe(SIMAGE_DATA_IN_PIPE); + Pipe_Unfreeze(); + + /* Read in the data into the buffer */ + ErrorCode = Pipe_Read_Stream_LE(Buffer, Bytes, NULL); + + /* Freeze the pipe again after use */ + Pipe_Freeze(); + + return ErrorCode; +} + +/** Function to test if a PIMA event block is waiting to be read in from the attached device. + * + * \return True if an event is waiting to be read in from the device, \c false otherwise + */ +bool SImage_IsEventReceived(void) +{ + bool IsEventReceived = false; + + /* Unfreeze the Event pipe */ + Pipe_SelectPipe(SIMAGE_EVENTS_PIPE); + Pipe_Unfreeze(); + + /* If the pipe contains data, an event has been received */ + if (Pipe_BytesInPipe()) + IsEventReceived = true; + + /* Freeze the pipe after use */ + Pipe_Freeze(); + + return IsEventReceived; +} + |