void usb_task(void)
{
// ---- DUAL-ROLE DEVICE/HOST USB MODE -----------------------------------------
#if USB_DEVICE_FEATURE == true && USB_HOST_FEATURE == true
// Depending on current USB mode, launch the correct USB task (device or host)
switch (g_usb_mode)
{
case USB_MODE_DEVICE:
usb_device_task();
break;
case USB_MODE_HOST:
usb_host_task();
break;
case USB_MODE_UNDEFINED:
default:
break;
}
// -----------------------------------------------------------------------------
// ---- DEVICE-ONLY USB MODE ---------------------------------------------------
#elif USB_DEVICE_FEATURE == true
usb_device_task();
// -----------------------------------------------------------------------------
// ---- REDUCED-HOST-ONLY USB MODE ---------------------------------------------
#elif USB_HOST_FEATURE == true
usb_host_task();
// -----------------------------------------------------------------------------
// ---- ERROR, NO MODE ENABLED -------------------------------------------------
#else
#endif
// -----------------------------------------------------------------------------
}
/**
* @brief Entry point of the USB mamnagement
*
* Depending on the USB mode supported (HOST/DEVICE/DUAL_ROLE) the function
* calls the coresponding usb management function.
*
* @param none
*
* @return none
*/
void usb_task(void)
{
// ---- DUAL ROLE DEVICE USB MODE ---------------------------------------------
#if ((USB_DEVICE_FEATURE == ENABLED)&& (USB_HOST_FEATURE == ENABLED))
if(Is_usb_id_device())
{ g_usb_mode=USB_MODE_DEVICE;}
else
{ g_usb_mode=USB_MODE_HOST;}
// TODO !!! ID pin hot state change
// Preliminary management: HARDWARE RESET !!!
#if ( ID_PIN_CHANGE_GENERATE_RESET == ENABLE)
// Hot ID transition generates wdt reset
if((g_old_usb_mode!=g_usb_mode))
#ifndef AVRGCC
{Wdt_change_16ms(); while(1); LOG_STR_CODE(log_id_change);}
#else
{Wdt_change_enable(); while(1); LOG_STR_CODE(log_id_change);}
#endif
#endif
g_old_usb_mode=g_usb_mode; // Store current usb mode, for mode change detection
// Depending on current usb mode, launch the correct usb task (device or host)
switch(g_usb_mode)
{
case USB_MODE_DEVICE:
usb_device_task();
break;
case USB_MODE_HOST:
usb_host_task();
break;
case USB_MODE_UNDEFINED: // No break !
default:
break;
}
// -----------------------------------------------------------------------------
// ---- DEVICE ONLY USB MODE ---------------------------------------------------
#elif ((USB_DEVICE_FEATURE == ENABLED)&& (USB_HOST_FEATURE == DISABLE))
usb_device_task();
// -----------------------------------------------------------------------------
// ---- REDUCED HOST ONLY USB MODE ---------------------------------------------
#elif ((USB_DEVICE_FEATURE == DISABLE)&& (USB_HOST_FEATURE == ENABLED))
usb_host_task();
// -----------------------------------------------------------------------------
//! ---- ERROR, NO MODE ENABLED -------------------------------------------------
#elif ((USB_DEVICE_FEATURE == DISABLE)&& (USB_HOST_FEATURE == DISABLE))
#error at least one of USB_DEVICE_FEATURE or USB_HOST_FEATURE should be enabled
#error otherwise the usb task has nothing to do ...
#endif
// -----------------------------------------------------------------------------
}
void usb_task(void)
{
// ---- DUAL-ROLE DEVICE/HOST USB MODE -----------------------------------------
#if USB_DEVICE_FEATURE == true && USB_HOST_FEATURE == true
if (g_old_usb_mode != g_usb_mode)
{
if (Is_usb_id_device())
{
usb_device_task_init();
}else{
private_sof_counter = 0;
usb_host_task_init();
}
g_old_usb_mode = g_usb_mode; // Store current USB mode, for mode change detection
Usb_enable_id_interrupt();
Enable_global_interrupt();
}
// Depending on current USB mode, launch the correct USB task (device or host)
switch (g_old_usb_mode)
{
case USB_MODE_DEVICE:
usb_device_task();
break;
case USB_MODE_HOST:
usb_host_task();
break;
case USB_MODE_UNDEFINED:
default:
break;
}
// -----------------------------------------------------------------------------
// ---- DEVICE-ONLY USB MODE ---------------------------------------------------
#elif USB_DEVICE_FEATURE == true
usb_device_task();
// -----------------------------------------------------------------------------
// ---- REDUCED-HOST-ONLY USB MODE ---------------------------------------------
#elif USB_HOST_FEATURE == true
usb_host_task();
// -----------------------------------------------------------------------------
// ---- ERROR, NO MODE true -------------------------------------------------
#else
#error At least one of USB_DEVICE_FEATURE and USB_HOST_FEATURE must be enabled
#endif
// -----------------------------------------------------------------------------
}
void cdc_receiving(void) { // return: Anzahl empfangener Bytes im Fifo
int bytes_rx, bytes_left;
#if USB_DEVICE_FEATURE == ENABLED && USB_HOST_FEATURE == ENABLED
usb_task();
#elif USB_DEVICE_FEATURE == ENABLED
usb_device_task();
#elif USB_HOST_FEATURE == ENABLED
usb_host_task();
#endif
if ( usb_connected && Is_usb_out_received(RX_EP) ) {
bytes_rx = Usb_byte_count(RX_EP);
if ((bytes_rx > 0)&&(bytes_rx < cdc_rxleft)) {
bytes_left = CDC_RXBUFFERSIZE-cdc_wrpos;
Usb_reset_endpoint_fifo_access(RX_EP);
if (bytes_rx <= bytes_left) { // Normalfall: kein Wrap
usb_read_ep_rxpacket(RX_EP, (void *)cdc_rxbuffer+cdc_wrpos, bytes_rx, NULL);
} else {
usb_read_ep_rxpacket(RX_EP, (void *)cdc_rxbuffer+cdc_wrpos, bytes_left, NULL);
usb_read_ep_rxpacket(RX_EP, (void *)cdc_rxbuffer, bytes_rx-bytes_left, NULL);
}
cdc_wrpos = (cdc_wrpos+bytes_rx)%CDC_RXBUFFERSIZE;
// End copy in own fifo
cdc_rxidle_pos = cdc_sof_counter + cdc_timeoutval;
cdc_timeout_enabled = (cdc_timeoutval>0)&&(cdc_timeout_fct!=NULL);
} // fi copy received
Usb_ack_out_received_free(RX_EP); // moved outside of if-con
} else if (cdc_timeout_enabled) {
if ((int)(cdc_sof_counter - cdc_rxidle_pos) >= 0) {
cdc_timeout_fct(cdc_rxlen);
cdc_timeout_enabled = FALSE;
}
} // esle fi to
// chain-tx (>64 byte):
if (cdc_txbuffer_len > 0) {
cdc_transmit(cdc_txbuffer, cdc_txbuffer_len);
} // fi
}
/**
* @brief Entry point of the USB mamnagement
*
* Depending on the USB mode supported (HOST/DEVICE/DUAL_ROLE) the function
* calls the coresponding usb management function.
*
* @param none
*
* @return none
*/
void usb_task(void)
{
// ---- DUAL ROLE DEVICE USB MODE ---------------------------------------------
#if ((USB_DEVICE_FEATURE == ENABLED)&& (USB_HOST_FEATURE == ENABLED))
if(Is_usb_id_device())
{ g_usb_mode=USB_MODE_DEVICE;}
else
{ g_usb_mode=USB_MODE_HOST;}
if( g_old_usb_mode != g_usb_mode )
{
// ID pin hot state change
#if ( ID_PIN_CHANGE_GENERATE_RESET == ENABLE)
// Hot ID transition generates wdt reset
wdtdrv_enable(WDTO_16MS);
while(1);
#else
// Hot ID transition reset USB mode
Usb_ack_id_transition(); // REQUIRED
if (Is_usb_id_host())
{
Usb_disable_resume_interrupt();
Usb_disable_wake_up_interrupt();
Usb_disable_suspend_interrupt();
Usb_disable_reset_interrupt();
Usb_detach();
Usb_disable();
usb_host_task_init();
}
else
{
Host_disable_device_disconnection_interrupt();
Host_disable_sof_interrupt();
Host_disable_sof();
Usb_disable_vbus();
Usb_disable_manual_vbus();
Usb_freeze_clock();
Usb_disable();
usb_device_task_init();
}
#endif
}
// Store current usb mode, for mode change detection
g_old_usb_mode=g_usb_mode;
// Depending on current usb mode, launch the correct usb task (device or host)
switch(g_usb_mode)
{
case USB_MODE_DEVICE:
usb_device_task();
break;
case USB_MODE_HOST:
usb_host_task();
break;
case USB_MODE_UNDEFINED: // No break !
default:
break;
}
// -----------------------------------------------------------------------------
// ---- DEVICE ONLY USB MODE ---------------------------------------------------
#elif ((USB_DEVICE_FEATURE == ENABLED)&& (USB_HOST_FEATURE == DISABLE))
usb_device_task();
// -----------------------------------------------------------------------------
// ---- REDUCED HOST ONLY USB MODE ---------------------------------------------
#elif ((USB_DEVICE_FEATURE == DISABLE)&& (USB_HOST_FEATURE == ENABLED))
usb_host_task();
// -----------------------------------------------------------------------------
//! ---- ERROR, NO MODE ENABLED -------------------------------------------------
#elif ((USB_DEVICE_FEATURE == DISABLE)&& (USB_HOST_FEATURE == DISABLE))
#error at least one of USB_DEVICE_FEATURE or USB_HOST_FEATURE should be enabled
#error otherwise the usb task has nothing to do ...
#endif
// -----------------------------------------------------------------------------
}