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Download Freescale Semiconductor Microcontrollers User's Manual
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HC08 Full Chip Simulation Configuration Procedure rti ************************************************************** * USB_SYS_ISR - USB System Interrupt Service Routine. * * Interrupts here if USB suspend, resume, reset, * * config_chg, start of frame, or setup event * * occurs. * ************************************************************** USB_SYS_ISR: brclr 2,USBSR,USB_SYS_ISR2 ; Is it USB reset? bclr 2,USBSR ; reset USB reset flag rti ; exit interrupt USB_SYS_ISR2: brclr 3,USBSR,USB_SYS_ISR3 brclr lda sta mov bclr bset bclr rti ; Is there a change in ; configuration? 7,USBSR,USB_CONFIG_CLR ptb ; get Port B value EP1BuffStart ; place in endpoint 1 data buffer #01,UEP1DSR ; set data size for endpoint 1 to 1 0,UEP1CSR ; clear the TFRC flag 1,UEP1CSR ; set the DVALID flag 3,USBSR ; clear the CONFIG_CHG flag ; exit interrupt USB_CONFIG_CLR: bclr 3,USBSR rti USB_SYS_ISR3: brclr 5,USBSR,USB_SYS_ISR4 jsr SETUP_PROC rti USB_SYS_ISR4: brclr 0,USBSR,USB_SYS_EXIT bclr 0,USBSR rti ; clear CONFIG_CHG bit ; exit interrupt ; is it SETUP packet? ; handle SETUP packet ; exit interrupt ; is it a SUSPEND event? ; reset suspend flag ; exit interrupt USB_SYS_EXIT: rti ************************************************************** * DUMMY_ISR - Dummy Interrupt Service Routine. * * Just does a return from interrupt. * ************************************************************** DUMMY_ISR: rti ; simple return ************************************************************** Microcontrollers Debugger Manual 319
