85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
/*
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* CTHN.de MiniLEDCube
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*
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* usb.h by Kai Lauterbach 11/2011
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*
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* Based on project: hid-custom-rq example by Christian Starkjohann
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* Copyright: (c) 2008 by OBJECTIVE DEVELOPMENT Software GmbH
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*
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* License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt)
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*
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*/
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#include "usb.h"
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/* ------------------------------------------------------------------------- */
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/*! \brief
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* \param data USB Data packet.
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* \return The length of the received or send data.
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*/
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usbMsgLen_t usbFunctionSetup(uchar data[8])
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{
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usbRequest_t *rq = (void *)data;
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if ( (rq->bmRequestType & USBRQ_TYPE_MASK) == USBRQ_TYPE_VENDOR )
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{
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if ( rq->bRequest == CUSTOM_RQ_SET_FRAME )
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{
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// because of the code size we have to transfer one frame in
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// two steps (control messages)
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if ( ! rq->wIndex.bytes[0] )
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{
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// the lower word
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frame = (frame & (uint32_t)0xffff0000) |
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( rq->wValue.bytes[0] +
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(rq->wValue.bytes[1] << 8) );
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} else {
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// the high word
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frame = (frame & (uint32_t)0x0000ffff) |
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((uint32_t)( rq->wValue.bytes[0] +
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(rq->wValue.bytes[1] << 8) ) << 16);
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}
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} else if ( rq->bRequest == CUSTOM_RQ_EEPROM_STORE_FRAME )
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{
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// save the actual frame to the eeprom
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// don't forget to send a frame first
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eeprom_write_dword( &eep_anim[ rq->wIndex.bytes[0] ], frame );
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} else if ( rq->bRequest == CUSTOM_RQ_SET_MODE )
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{
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// set the firmware mode
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// 0 = stop; 1 = single; 2 = loop
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mode = rq->wValue.bytes[0];
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}
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}
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return 0; /* default for not implemented requests: return no data back to host */
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}
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/* ------------------------------------------------------------------------- */
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/*! \brief Initializes the USB conneciton.
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*/
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void init_usb(void)
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{
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uint8_t i;
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usbInit();
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usbDeviceDisconnect(); /* enforce re-enumeration, do this while interrupts are disabled! */
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// fake USB disconnect for > 250 ms
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while(--i)
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{
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asm volatile("nop"::);
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}
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usbDeviceConnect();
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}
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/* ------------------------------------------------------------------------- */
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