{&nbsp;<br />&nbsp;while&nbsp;(I2CS&nbsp;&amp;&nbsp;0x40);&nbsp;//Wait&nbsp;for&nbsp;stop&nbsp;to&nbsp;be&nbsp;done&nbsp;<br />&nbsp;I2CS&nbsp;=&nbsp;0x80;&nbsp;&nbsp;&nbsp;//Set&nbsp;start&nbsp;condition&nbsp;<br />&nbsp;I2DAT&nbsp;=&nbsp;LED_ADDR;&nbsp;&nbsp;//Write&nbsp;led&nbsp;address&nbsp;<br />&nbsp;while&nbsp;(!(I2CS&nbsp;&amp;&nbsp;0x01));&nbsp;//Wait&nbsp;for&nbsp;done&nbsp;<br />&nbsp;I2DAT&nbsp;=&nbsp;d;&nbsp;&nbsp;&nbsp;&nbsp;//Write&nbsp;data&nbsp;<br />&nbsp;while&nbsp;(!(I2CS&nbsp;&amp;&nbsp;0x01));&nbsp;//Wait&nbsp;for&nbsp;done&nbsp;<br />&nbsp;I2CS&nbsp;=&nbsp;0x40;&nbsp;&nbsp;&nbsp;//Set&nbsp;stop&nbsp;bit&nbsp;<br />}&nbsp;<br />void&nbsp;TD_Poll(void)&nbsp;&nbsp;&nbsp;&nbsp;//&nbsp;Called&nbsp;repeatedly&nbsp;while&nbsp;the&nbsp;device&nbsp;is&nbsp;idle&nbsp;<br />{&nbsp;<br />&nbsp;if(&nbsp;!(EPIO[IN2BUF_ID].cntrl&nbsp;&amp;&nbsp;bmEPBUSY)&nbsp;)&nbsp;//&nbsp;Is&nbsp;the&nbsp;IN2BUF&nbsp;available,&nbsp;<br />&nbsp;{&nbsp;<br />&nbsp;&nbsp;buttons&nbsp;=&nbsp;read_buttons();&nbsp;<br />&nbsp;&nbsp;if&nbsp;(buttons&nbsp;==&nbsp;read_buttons())&nbsp;&nbsp;&nbsp;//Debounce&nbsp;<br />&nbsp;&nbsp;{&nbsp;<br />&nbsp;&nbsp;&nbsp;buttons&nbsp;&amp;=&nbsp;0x0F;&nbsp;<br />&nbsp;&nbsp;&nbsp;if&nbsp;((oldbuttons&nbsp;-&nbsp;buttons)&nbsp;!=&nbsp;0)&nbsp;//Change&nbsp;in&nbsp;button&nbsp;state&nbsp;<br />&nbsp;&nbsp;&nbsp;{&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(buttons&nbsp;&amp;&nbsp;1)&nbsp;//Shift&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;IN2BUF[0]&nbsp;=&nbsp;0;&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;else&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;IN2BUF[0]&nbsp;=&nbsp;2;&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(buttons&nbsp;&amp;&nbsp;2)&nbsp;//a&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;IN2BUF[2]&nbsp;=&nbsp;0;&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;else&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;IN2BUF[2]&nbsp;=&nbsp;4;&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(buttons&nbsp;&amp;&nbsp;4)&nbsp;//b&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;IN2BUF[3]&nbsp;=&nbsp;0;&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;else&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;IN2BUF[3]&nbsp;=&nbsp;5;&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(buttons&nbsp;&amp;&nbsp;8)&nbsp;//c&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;IN2BUF[4]&nbsp;=&nbsp;0;&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;else&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;IN2BUF[4]&nbsp;=&nbsp;6;&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;IN2BUF[1]&nbsp;=&nbsp;0;&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;IN2BC&nbsp;=&nbsp;5;&nbsp;<br />&nbsp;&nbsp;&nbsp;}&nbsp;<br />&nbsp;&nbsp;&nbsp;oldbuttons&nbsp;=&nbsp;buttons;&nbsp;<br />&nbsp;&nbsp;}&nbsp;<br />&nbsp;}&nbsp;<br />&nbsp;if(&nbsp;!(EPIO[OUT2BUF_ID].cntrl&nbsp;&amp;&nbsp;bmEPBUSY)&nbsp;)&nbsp;//&nbsp;Is&nbsp;there&nbsp;something&nbsp;available&nbsp;<br />&nbsp;{&nbsp;<br />&nbsp;&nbsp;leds&nbsp;=&nbsp;0xFF;&nbsp;&nbsp;&nbsp;//Turn&nbsp;all&nbsp;off&nbsp;<br />&nbsp;&nbsp;if&nbsp;(OUT2BUF[0]&nbsp;&amp;&nbsp;0x02)&nbsp;//Caps&nbsp;<br />&nbsp;&nbsp;&nbsp;leds&nbsp;&amp;=&nbsp;0xBF;&nbsp;<br />&nbsp;&nbsp;if&nbsp;(OUT2BUF[0]&nbsp;&amp;&nbsp;0x01)&nbsp;//Scroll&nbsp;<br />&nbsp;&nbsp;&nbsp;leds&nbsp;&amp;=&nbsp;0xF7;&nbsp;<br />&nbsp;&nbsp;if&nbsp;(OUT2BUF[0]&nbsp;&amp;&nbsp;0x04)&nbsp;//Num&nbsp;<br />&nbsp;&nbsp;&nbsp;leds&nbsp;&amp;=&nbsp;0xFE;&nbsp;<br />&nbsp;&nbsp;write_leds&nbsp;(leds);&nbsp;<br />&nbsp;&nbsp;OUT2BC&nbsp;=&nbsp;0;&nbsp;&nbsp;&nbsp;&nbsp;//Rearm&nbsp;endpoint&nbsp;buffer&nbsp;<br />&nbsp;}&nbsp;<br />}&nbsp;<br />BOOL&nbsp;TD_Suspend(void)&nbsp;&nbsp;&nbsp;&nbsp;//&nbsp;Called&nbsp;before&nbsp;the&nbsp;device&nbsp;goes&nbsp;into&nbsp;suspend&nbsp;mode&nbsp;<br />{&nbsp;<br />&nbsp;//&nbsp;Turn&nbsp;off&nbsp;breakpoint&nbsp;light&nbsp;before&nbsp;entering&nbsp;suspend&nbsp;<br />&nbsp;USBBAV&nbsp;|=&nbsp;bmBREAK;&nbsp;&nbsp;//&nbsp;Clear&nbsp;the&nbsp;breakpoint&nbsp;<br />&nbsp;return(TRUE);&nbsp;<br />}&nbsp;<br />BOOL&nbsp;TD_Resume(void)&nbsp;&nbsp;&nbsp;&nbsp;//&nbsp;Called&nbsp;after&nbsp;the&nbsp;device&nbsp;resumes&nbsp;<br />{&nbsp;<br />&nbsp;return(TRUE);&nbsp;<br />}&nbsp;<br />//--------------------------------------------------------------------------&nbsp;<br />---&nbsp;<br />//&nbsp;Device&nbsp;Request&nbsp;hooks&nbsp;<br />//&nbsp;The&nbsp;following&nbsp;hooks&nbsp;are&nbsp;called&nbsp;by&nbsp;the&nbsp;end&nbsp;point&nbsp;0&nbsp;device&nbsp;request&nbsp;parser.&nbsp;<br />//--------------------------------------------------------------------------&nbsp;<br />---&nbsp;<br />BOOL&nbsp;DR_ClassRequest(void)&nbsp;<br />{&nbsp;<br />&nbsp;return(TRUE);&nbsp;<br />}&nbsp;<br />BOOL&nbsp;DR_GetDescriptor(void)&nbsp;<br />{&nbsp;<br />&nbsp;BYTE&nbsp;length,i;&nbsp;<br />&nbsp;pHIDDscr&nbsp;=&nbsp;(WORD)&amp;HIDDscr;&nbsp;<br />&nbsp;pReportDscr&nbsp;=&nbsp;(WORD)&amp;ReportDscr;&nbsp;<br />&nbsp;pReportDscrEnd&nbsp;=&nbsp;(WORD)&amp;ReportDscrEnd;&nbsp;<br />&nbsp;switch&nbsp;(SETUPDAT[3])&nbsp;<br />&nbsp;{&nbsp;<br />&nbsp;&nbsp;case&nbsp;GD_HID:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;//HID&nbsp;Descriptor&nbsp;<br />&nbsp;&nbsp;&nbsp;SUDPTRH&nbsp;=&nbsp;MSB(pHIDDscr);&nbsp;<br />&nbsp;&nbsp;&nbsp;SUDPTRL&nbsp;=&nbsp;LSB(pHIDDscr);&nbsp;<br />&nbsp;&nbsp;&nbsp;return&nbsp;(FALSE);&nbsp;<br />&nbsp;&nbsp;case&nbsp;GD_REPORT:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;//Report&nbsp;Descriptor&nbsp;<br />&nbsp;&nbsp;&nbsp;length&nbsp;=&nbsp;pReportDscrEnd&nbsp;-&nbsp;pReportDscr;&nbsp;<br />&nbsp;&nbsp;&nbsp;while&nbsp;(length)&nbsp;<br />&nbsp;&nbsp;&nbsp;{&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;for(i=0;&nbsp;i&lt;min(length,64);&nbsp;i++)&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*(IN0BUF+i)&nbsp;=&nbsp;*((BYTE&nbsp;xdata&nbsp;*)pReportDscr+i);&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;//set&nbsp;length&nbsp;and&nbsp;arm&nbsp;Endpoint&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;EZUSB_SET_EP_BYTES(IN0BUF_ID,min(length,64));&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;length&nbsp;-=&nbsp;min(length,64);&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;//&nbsp;Wait&nbsp;for&nbsp;it&nbsp;to&nbsp;go&nbsp;out&nbsp;(Rev&nbsp;C&nbsp;and&nbsp;above)&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;while(EP0CS&nbsp;&amp;&nbsp;0x04)&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;;&nbsp;<br />&nbsp;&nbsp;&nbsp;}&nbsp;<br />&nbsp;&nbsp;&nbsp;return&nbsp;(FALSE);&nbsp;<br />&nbsp;&nbsp;default:&nbsp;<br />&nbsp;&nbsp;&nbsp;return(TRUE);&nbsp;<br />&nbsp;}&nbsp;<br />}&nbsp;<br />BOOL&nbsp;DR_SetConfiguration(void)&nbsp;//&nbsp;Called&nbsp;when&nbsp;a&nbsp;Set&nbsp;Configuration&nbsp;command&nbsp;is&nbsp;<br />&nbsp;received&nbsp;<br />{&nbsp;<br />&nbsp;Configuration&nbsp;=&nbsp;SETUPDAT[2];&nbsp;<br />&nbsp;return(TRUE);&nbsp;&nbsp;&nbsp;&nbsp;//&nbsp;Handled&nbsp;by&nbsp;user&nbsp;code&nbsp;<br />}&nbsp;<br />BOOL&nbsp;DR_GetConfiguration(void)&nbsp;//&nbsp;Called&nbsp;when&nbsp;a&nbsp;Get&nbsp;Configuration&nbsp;command&nbsp;is&nbsp;<br />&nbsp;received&nbsp;<br />{&nbsp;<br />&nbsp;IN0BUF[0]&nbsp;=&nbsp;Configuration;&nbsp;<br />&nbsp;EZUSB_SET_EP_BYTES(IN0BUF_ID,1);&nbsp;<br />&nbsp;return(TRUE);&nbsp;&nbsp;&nbsp;&nbsp;//&nbsp;Handled&nbsp;by&nbsp;user&nbsp;code&nbsp;<br />}&nbsp;<br />BOOL&nbsp;DR_SetInterface(void)&nbsp;&nbsp;&nbsp;//&nbsp;Called&nbsp;when&nbsp;a&nbsp;Set&nbsp;Interface&nbsp;command&nbsp;is&nbsp;recei&nbsp;<br />ved&nbsp;<br />{&nbsp;<br />&nbsp;AlternateSetting&nbsp;=&nbsp;SETUPDAT[2];&nbsp;<br />&nbsp;return(TRUE);&nbsp;&nbsp;&nbsp;&nbsp;//&nbsp;Handled&nbsp;by&nbsp;user&nbsp;code&nbsp;<br />}&nbsp;<br />BOOL&nbsp;DR_GetInterface(void)&nbsp;&nbsp;&nbsp;//&nbsp;Called&nbsp;when&nbsp;a&nbsp;Set&nbsp;Interface&nbsp;command&nbsp;is&nbsp;recei&nbsp;<br />ved&nbsp;<br />{&nbsp;<br />&nbsp;IN0BUF[0]&nbsp;=&nbsp;AlternateSetting;&nbsp;<br />&nbsp;EZUSB_SET_EP_BYTES(IN0BUF_ID,1);&nbsp;<br />&nbsp;return(TRUE);&nbsp;&nbsp;&nbsp;&nbsp;//&nbsp;Handled&nbsp;by&nbsp;user&nbsp;code&nbsp;<br />}&nbsp;<br />BOOL&nbsp;DR_GetStatus(void)&nbsp;<br />{&nbsp;<br />&nbsp;return(TRUE);&nbsp;<br />}&nbsp;<br />BOOL&nbsp;DR_ClearFeature(void)&nbsp;<br />{&nbsp;<br />&nbsp;return(TRUE);&nbsp;<br />}&nbsp;<br />BOOL&nbsp;DR_SetFeature(void)&nbsp;<br />{&nbsp;<br />&nbsp;return(TRUE);&nbsp;<br />}&nbsp;<br />BOOL&nbsp;DR_VendorCmnd(void)&nbsp;<br />{&nbsp;<br />&nbsp;return(TRUE);&nbsp;<br />}&nbsp;<br />//--------------------------------------------------------------------------&nbsp;<br />---&nbsp;<br />//&nbsp;USB&nbsp;Interrupt&nbsp;Handlers&nbsp;<br />//&nbsp;The&nbsp;following&nbsp;functions&nbsp;are&nbsp;called&nbsp;by&nbsp;the&nbsp;USB&nbsp;interrupt&nbsp;jump&nbsp;table.&nbsp;<br />//--------------------------------------------------------------------------&nbsp;<br />---&nbsp;<br />//&nbsp;Setup&nbsp;Data&nbsp;Available&nbsp;Interrupt&nbsp;Handler&nbsp;<br />void&nbsp;ISR_Sudav(void)&nbsp;interrupt&nbsp;0&nbsp;<br />{&nbsp;<br />&nbsp;GotSUD&nbsp;=&nbsp;TRUE;&nbsp;&nbsp;&nbsp;&nbsp;//&nbsp;Set&nbsp;flag&nbsp;<br />&nbsp;EZUSB_IRQ_CLEAR();&nbsp;<br />&nbsp;USBIRQ&nbsp;=&nbsp;bmSUDAV;&nbsp;&nbsp;&nbsp;//&nbsp;Clear&nbsp;SUDAV&nbsp;IRQ&nbsp;<br />}&nbsp;<br />//&nbsp;Setup&nbsp;Token&nbsp;Interrupt&nbsp;Handler&nbsp;<br />void&nbsp;ISR_Sutok(void)&nbsp;interrupt&nbsp;0&nbsp;<br />{&nbsp;<br />&nbsp;EZUSB_IRQ_CLEAR();&nbsp;<br />&nbsp;USBIRQ&nbsp;=&nbsp;bmSUTOK;&nbsp;&nbsp;&nbsp;//&nbsp;Clear&nbsp;SUTOK&nbsp;IRQ&nbsp;<br />}&nbsp;<br />void&nbsp;ISR_Sof(void)&nbsp;interrupt&nbsp;0&nbsp;<br />{&nbsp;<br />&nbsp;EZUSB_IRQ_CLEAR();&nbsp;<br />&nbsp;USBIRQ&nbsp;=&nbsp;bmSOF;&nbsp;&nbsp;&nbsp;&nbsp;//&nbsp;Clear&nbsp;SOF&nbsp;IRQ&nbsp;<br />}&nbsp;<br />void&nbsp;ISR_Ures(void)&nbsp;interrupt&nbsp;0&nbsp;<br />{&nbsp;<br />&nbsp;EZUSB_IRQ_CLEAR();&nbsp;<br />&nbsp;USBIRQ&nbsp;=&nbsp;bmURES;&nbsp;&nbsp;&nbsp;//&nbsp;Clear&nbsp;URES&nbsp;IRQ&nbsp;<br />}&nbsp;<br />void&nbsp;ISR_IBN(void)&nbsp;interrupt&nbsp;0&nbsp;<br />{&nbsp;<br />&nbsp;&nbsp;&nbsp;//&nbsp;ISR&nbsp;for&nbsp;the&nbsp;IN&nbsp;Bulk&nbsp;NAK&nbsp;(IBN)&nbsp;interrupt.&nbsp;<br />}&nbsp;<br />void&nbsp;ISR_Susp(void)&nbsp;interrupt&nbsp;0&nbsp;<br />{&nbsp;<br />&nbsp;Sleep&nbsp;=&nbsp;TRUE;&nbsp;<br />&nbsp;EZUSB_IRQ_CLEAR();&nbsp;<br />&nbsp;USBIRQ&nbsp;=&nbsp;bmSUSP;&nbsp;<br />}&nbsp;<br />void&nbsp;ISR_Ep0in(void)&nbsp;interrupt&nbsp;0&nbsp;<br />{&nbsp;<br />}&nbsp;<br />void&nbsp;ISR_Ep0out(void)&nbsp;interrupt&nbsp;0&nbsp;<br />{&nbsp;<br />}&nbsp;<br />void&nbsp;ISR_Ep1in(void)&nbsp;interrupt&nbsp;0&nbsp;<br />{&nbsp;<br />}&nbsp;<br />void&nbsp;ISR_Ep1out(void)&nbsp;interrupt&nbsp;0&nbsp;<br />{&nbsp;<br />}&nbsp;<br />void&nbsp;ISR_Ep2in(void)&nbsp;interrupt&nbsp;0&nbsp;<br />{&nbsp;<br />}&nbsp;<br />void&nbsp;ISR_Ep2out(void)&nbsp;interrupt&nbsp;0&nbsp;<br />{&nbsp;<br />