bool udd_ep_is_halted(udd_ep_id_t ep)
{
uint8_t ep_index = ep & USB_EP_ADDR_MASK;
return Is_udd_endpoint_stall_requested(ep_index);
}
bool udd_ep_is_halted(udd_ep_id_t ep)
{
return Is_udd_endpoint_stall_requested(ep & USB_EP_ADDR_MASK);
}
bool udd_ep_run(udd_ep_id_t ep, bool b_shortpacket,
uint8_t * buf, iram_size_t buf_size,
udd_callback_trans_t callback)
{
uint16_t ep_size, trans_size, short_packet;
bool b_dir_in;
udd_ep_job_t *ptr_job;
irqflags_t flags;
b_dir_in = (USB_EP_DIR_IN == (ep & USB_EP_DIR_IN));
ep &= USB_EP_ADDR_MASK;
if (USB_DEVICE_MAX_EP < ep)
return false;
// Get job about endpoint
ptr_job = &udd_ep_job[ep - 1];
if ((!Is_udd_endpoint_enabled(ep))
|| Is_udd_endpoint_stall_requested(ep))
return false; // Endpoint is halted
flags = cpu_irq_save();
if (ptr_job->busy == true) {
cpu_irq_restore(flags);
return false; // Job already on going
}
ptr_job->busy = true;
cpu_irq_restore(flags);
// No job running. Let's setup a new one.
//
// The USB hardware support a maximum transfer size of 0x7FFF Bytes
ep_size = udd_get_endpoint_size(ep);
if (0x7FFF < buf_size) {
trans_size = 0x7FFF - (0x7FFF % ep_size);
short_packet = 0;
} else {
trans_size = buf_size;
short_packet = trans_size % ep_size;
}
if (b_dir_in) {
// Need ZLP, if requested and last packet is not a short packet
udd_udesc_set_buf0_autozlp(ep, b_shortpacket);
udd_udesc_set_buf0_ctn(ep, trans_size);
udd_udesc_rst_buf0_size(ep);
// Link the user buffer directly on USB hardware DMA
udd_udesc_set_buf0_addr(ep, buf);
} else {
udd_udesc_rst_buf0_ctn(ep);
ptr_job->nb_trans = 0;
if (trans_size < ep_size) {
// The user buffer is smaller than endpoint size
if (AVR32_USBC_PTYPE_ISOCHRONOUS ==
udd_get_endpoint_type(ep)) {
ptr_job->busy = false;
return false; // The user must use a buffer corresponding at isochrnous endpoint size
}
// Use the cache buffer for Bulk or Interrupt size endpoint
ptr_job->b_use_out_cache_buffer = true;
udd_udesc_set_buf0_addr(ep,
udd_ep_out_cache_buffer[ep - 1]);
udd_udesc_set_buf0_size(ep, ep_size);
} else {
// Link the user buffer directly on USB hardware DMA
ptr_job->b_use_out_cache_buffer = false;
udd_udesc_set_buf0_addr(ep, buf);
udd_udesc_set_buf0_size(ep, trans_size - short_packet);
}
}
// Update Job information
ptr_job->buf = buf;
ptr_job->buf_size = trans_size;
ptr_job->call_trans = callback;
ptr_job->busy = true;
// Start transfer
udd_disable_busy_bank0(ep);
// Enable interrupt
flags = cpu_irq_save();
if (b_dir_in) {
udd_ack_fifocon(ep);
udd_ack_in_send(ep);
udd_enable_in_send_interrupt(ep);
} else {
udd_enable_out_received_interrupt(ep);
}
udd_enable_endpoint_interrupt(ep);
cpu_irq_restore(flags);
return true;
}
