static bool udd_ep_interrupt(void)
{
udd_ep_id_t ep;
udd_ep_job_t *ptr_job;
// For each endpoint different of control endpoint (0)
for (ep = 1; ep <= USB_DEVICE_MAX_EP; ep++) {
// Get job corresponding at endpoint
ptr_job = &udd_ep_job[ep - 1];
// Check DMA event
if (Is_udd_endpoint_dma_interrupt_enabled(ep)
&& Is_udd_endpoint_dma_interrupt(ep)) {
uint32_t nb_remaining;
if( udd_endpoint_dma_get_status(ep)
& AVR32_USBB_UDDMA1_STATUS_CH_EN_MASK) {
return true; // Ignore EOT_STA interrupt
}
udd_disable_endpoint_dma_interrupt(ep);
// Save number of data no transfered
nb_remaining = (udd_endpoint_dma_get_status(ep) &
AVR32_USBB_UDDMA1_STATUS_CH_BYTE_CNT_MASK)
>> AVR32_USBB_UDDMA1_STATUS_CH_BYTE_CNT_OFFSET;
if (nb_remaining) {
// Transfer no complete (short packet or ZLP) then:
// Update number of data transfered
ptr_job->nb_trans -= nb_remaining;
// Set transfer complete to stop the transfer
ptr_job->buf_size = ptr_job->nb_trans;
}
udd_ep_trans_done(ep);
return true;
}
// Check empty bank interrupt event
if (Is_udd_endpoint_interrupt_enabled(ep)) {
if (Is_udd_in_send_interrupt_enabled(ep) && Is_udd_in_send(ep)) {
udd_disable_in_send_interrupt(ep);
// One bank is free then send a ZLP
udd_ack_in_send(ep);
udd_ack_fifocon(ep);
udd_ep_finish_job(ptr_job, false, ep);
return true;
}
if (Is_udd_bank_interrupt_enabled(ep) && (0 == udd_nb_busy_bank(ep))) {
// End of background transfer on IN endpoint
udd_disable_bank_interrupt(ep);
udd_disable_endpoint_interrupt(ep);
Assert(ptr_job->stall_requested);
// A stall has been requested during background transfer
ptr_job->stall_requested = false;
udd_disable_endpoint_bank_autoswitch(ep);
udd_enable_stall_handshake(ep);
udd_reset_data_toggle(ep);
return true;
}
}
}
static bool udd_ep_interrupt(void)
{
udd_ep_id_t ep;
udd_ep_job_t *ptr_job;
// For each endpoint different of control endpoint (0)
for (ep = 1; ep <= USB_DEVICE_MAX_EP; ep++) {
// Check DMA event
if (Is_udd_endpoint_dma_interrupt_enabled(ep)
&& Is_udd_endpoint_dma_interrupt(ep)) {
uint32_t nb_remaining;
udd_disable_endpoint_dma_interrupt(ep);
// Save number of data no transfered
nb_remaining = (udd_endpoint_dma_get_status(ep) &
AVR32_USBB_UDDMA1_STATUS_CH_BYTE_CNT_MASK)
>>
AVR32_USBB_UDDMA1_STATUS_CH_BYTE_CNT_OFFSET;
// Get job corresponding at endpoint
ptr_job = &udd_ep_job[ep - 1];
// Update number of data transfered
ptr_job->buf_size -= nb_remaining;
if (!Is_udd_endpoint_in(ep)) {
// Disable autoswitch bank on OUT
udd_disable_endpoint_bank_autoswitch(ep);
} else {
// Wait end of background transfer on IN endpoint before disabled autoswitch bank
udd_enable_endpoint_interrupt(ep);
udd_enable_bank_interrupt(ep);
}
// Call callback to signal end of transfer
udd_ep_finish_job(&udd_ep_job[ep - 1], false);
return true;
}
// Check empty bank interrupt event
if (Is_udd_endpoint_interrupt_enabled(ep)
&& (0 == udd_nb_busy_bank(ep))) {
// End of background transfer on IN endpoint
udd_disable_bank_interrupt(ep);
udd_disable_endpoint_interrupt(ep);
// If no new transfer running then disable autoswitch bank
if (!udd_ep_job[ep - 1].busy) {
udd_disable_endpoint_bank_autoswitch(ep);
}
// If a stall has been requested during backgound transfer then execute it
if (udd_ep_job[ep - 1].stall_requested) {
udd_ep_job[ep - 1].stall_requested = false;
udd_enable_stall_handshake(ep);
udd_reset_data_toggle(ep);
}
return true;
}
}
bool udd_ep_clear_halt(udd_ep_id_t ep)
{
bool b_stall_cleared = false;
udd_ep_job_t *ptr_job;
ep &= USB_EP_ADDR_MASK;
if (USB_DEVICE_MAX_EP < ep)
return false;
ptr_job = &udd_ep_job[ep - 1];
if (ptr_job->stall_requested) {
// Endpoint stall has been requested but not done
// Remove stall request
ptr_job->stall_requested = false;
udd_disable_bank_interrupt(ep);
udd_disable_endpoint_interrupt(ep);
b_stall_cleared = true;
}
if (Is_udd_endpoint_stall_requested(ep)) {
if (Is_udd_stall(ep)) {
udd_ack_stall(ep);
// A packet has been stalled
// then reset datatoggle
udd_reset_data_toggle(ep);
}
// Disable stall
udd_disable_stall_handshake(ep);
udd_enable_endpoint_bank_autoswitch(ep);
b_stall_cleared = true;
}
if (b_stall_cleared) {
// If a job is register on clear halt action
// then execute callback
if (ptr_job->busy == true) {
ptr_job->busy = false;
ptr_job->call_nohalt();
}
}
return true;
}