// see usb_hw_layer.h for documentation
void usb_task(void)
{
if (usb_attached())
{
if (UCON_USBEN==0)
{
usb_attach();
}
}
else
{
if (UCON_USBEN==1)
{
usb_detach();
}
}
if ((usb_state == USB_STATE_ATTACHED)&&(!UCON_SE0))
{
UIR=0;
UIE=0;
//enable_interrupts(INT_USB);
//enable_interrupts(GLOBAL);
UIE=__USB_UIF_IDLE | __USB_UIF_RESET; //enable IDLE and RESET USB ISR
usb_state=USB_STATE_POWERED;
}
}
/////////////////////////////////////////////////////////////////////////////
//
// usb_debug_task()
//
// When called periodically, displays debugging information over serial
// to display enumeration and connection states. Also lights LED1 based upon
// enumeration and status.
//
/////////////////////////////////////////////////////////////////////////////
void usb_debug_task(void) {
static int8 last_connected;
static int8 last_enumerated;
int8 new_connected;
int8 new_enumerated;
static int8 last_cdc;
int8 new_cdc;
new_connected=usb_attached();
new_enumerated=usb_enumerated();
new_cdc=usb_cdc_connected();
if (new_enumerated)
LED_ON(LED1);
else
LED_OFF(LED1);
if (new_cdc)
LED_ON(LED2);
else
LED_OFF(LED2);
if (usb_cdc_carrier.dte_present)
LED_ON(LED3);
else
LED_OFF(LED3);
if (new_connected && !last_connected)
printf("USB connected, waiting for enumaration...\r\n\n");
if (!new_connected && last_connected)
printf("USB disconnected, waiting for connection...\r\n\n");
if (new_enumerated && !last_enumerated)
printf("USB enumerated by PC/HOST\r\n\n");
if (!new_enumerated && last_enumerated)
printf("USB unenumerated by PC/HOST, waiting for enumeration...\r\n\n");
if (new_cdc && !last_cdc) {
printf("Serial program initiated on USB<->UART COM Port\r\n\n");
printf(usb_cdc_putc, "\r\n\nCCS CDC (Virtual RS232) Example\r\n\n");
}
last_connected=new_connected;
last_enumerated=new_enumerated;
last_cdc=new_cdc;
}
// see usb_hw_layer.h for documentation
void usb_task(void)
{
#if defined(USB_ISR_POLLING)
if (interrupt_active(INT_USB))
{
usb_isr();
}
#endif
if (usb_attached())
{
if (UCON_USBEN==0)
{
debug_usb(debug_putc, "\r\n\nUSB TASK: ATTACH");
usb_attach();
}
}
else
{
if (UCON_USBEN==1)
{
debug_usb(debug_putc, "\r\n\nUSB TASK: DE-ATTACH");
usb_detach();
}
}
if ((usb_state == USB_STATE_ATTACHED)&&(!UCON_SE0))
{
UIR=0;
UIE=0;
#if !defined(USB_ISR_POLLING)
enable_interrupts(INT_USB);
enable_interrupts(GLOBAL);
#endif
UIE=__USB_UIF_IDLE | __USB_UIF_RESET; //enable IDLE and RESET USB ISR
usb_state=USB_STATE_POWERED;
debug_usb(debug_putc, "\r\n\nUSB TASK: POWERED");
}
}
