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Implement dcd_edpt_ISO_xfer() and adapt transmission scheme

This commit is contained in:
Reinhard Panhuber 2021-01-18 17:15:23 +01:00
parent 2284db1fb5
commit dff588d772
1 changed files with 40 additions and 15 deletions
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55
src/portable/st/synopsys/dcd_synopsys.c
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@ -670,8 +670,13 @@ bool dcd_edpt_xfer (uint8_t rhport, uint8_t ep_addr, uint8_t * buffer, uint16_t
return true;
}
bool dcd_edpt_ISO_xfer (uint8_t rhport, uint8_t ep_addr, tu_fifo_t * ff, uint16_t total_bytes)
bool dcd_edpt_ISO_xfer (uint8_t rhport, uint8_t ep_addr, tu_fifo_t * ff)
{
// USB buffers always work in bytes so to avoid unnecessary divisions we demand item_size = 1
TU_ASSERT(ff->item_size == 1);
uint16_t total_bytes = tu_fifo_count(ff);
uint8_t const epnum = tu_edpt_number(ep_addr);
uint8_t const dir = tu_edpt_dir(ep_addr);
@ -680,6 +685,16 @@ bool dcd_edpt_ISO_xfer (uint8_t rhport, uint8_t ep_addr, tu_fifo_t * ff, uint16_
xfer->ff = ff;
xfer->total_len = total_bytes;
// Set copy mode to constant address - required since data copied to or from the hardware USB FIFO needs to be written at a constant address
if (dir == TUSB_DIR_IN)
{
tu_fifo_set_copy_mode_write(ff, TU_FIFO_COPY_CST);
}
else
{
tu_fifo_set_copy_mode_read(ff, TU_FIFO_COPY_CST);
}
// EP0 can only handle one packet
if(epnum == 0) {
ep0_pending[dir] = total_bytes;
@ -692,9 +707,7 @@ bool dcd_edpt_ISO_xfer (uint8_t rhport, uint8_t ep_addr, tu_fifo_t * ff, uint16_
uint8_t const short_packet_size = total_bytes % xfer->max_size;
// Zero-size packet is special case.
if(short_packet_size > 0 || (total_bytes == 0)) {
num_packets++;
}
if(short_packet_size > 0 || (total_bytes == 0)) num_packets++;
// Schedule packets to be sent within interrupt
edpt_schedule_packets(rhport, epnum, dir, num_packets, total_bytes);
@ -900,14 +913,20 @@ static void handle_rxflvl_ints(uint8_t rhport, USB_OTG_OUTEndpointTypeDef * out_
{
xfer_ctl_t * xfer = XFER_CTL_BASE(epnum, TUSB_DIR_OUT);
// TODO: TAKE CARE OF ISO FIFO!
// Read packet off RxFIFO
read_fifo_packet(rhport, xfer->buffer, bcnt);
if (xfer->buffer)
{
// Linear buffer
read_fifo_packet(rhport, xfer->buffer, bcnt);
// Increment pointer to xfer data
xfer->buffer += bcnt;
// Increment pointer to xfer data
xfer->buffer += bcnt;
}
else
{
// Ring buffer
tu_fifo_write_n(xfer->ff, (const void *) rx_fifo, bcnt);
}
// Truncate transfer length in case of short packet
if(bcnt < xfer->max_size) {
@ -1014,13 +1033,19 @@ static void handle_epin_ints(uint8_t rhport, USB_OTG_DeviceTypeDef * dev, USB_OT
break;
}
// TODO: TAKE CARE OF ISO FIFO!
// Push packet to Tx-FIFO
write_fifo_packet(rhport, n, xfer->buffer, packet_size);
if (xfer->buffer)
{
write_fifo_packet(rhport, n, xfer->buffer, packet_size);
// Increment pointer to xfer data
xfer->buffer += packet_size;
// Increment pointer to xfer data
xfer->buffer += packet_size;
}
else
{
usb_fifo_t tx_fifo = FIFO_BASE(rhport, n);
tu_fifo_read_n(xfer->ff, (void *) tx_fifo, packet_size);
}
}
// Turn off TXFE if all bytes are written.