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Reset TX and RX endpoints to NAK when receiving setup packet.

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This commit is contained in:
Nathan Conrad 2019-09-25 20:53:22 -04:00
parent 048e0448c0
commit f19082f02d
1 changed files with 8 additions and 3 deletions
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11
src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
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@ -418,10 +418,15 @@ static uint16_t dcd_ep_ctr_handler(void)
uint8_t userMemBuf[8];
/* Get SETUP Packet*/
count = pcd_get_ep_rx_cnt(USB, EPindex);
//TU_ASSERT_ERR(count == 8);
dcd_read_packet_memory(userMemBuf, *pcd_ep_rx_address_ptr(USB,EPindex), 8);
if(count == 8) // Setup packet should always be 8 bits. If not, ignore it, and try again.
{
// Must reset EP to NAK (in case it had been stalling) (though, maybe too late here)
pcd_set_ep_rx_status(USB,0u,USB_EP_RX_NAK);
pcd_set_ep_tx_status(USB,0u,USB_EP_TX_NAK);
dcd_read_packet_memory(userMemBuf, *pcd_ep_rx_address_ptr(USB,EPindex), 8);
dcd_event_setup_received(0, (uint8_t*)userMemBuf, true);
}
/* SETUP bit kept frozen while CTR_RX = 1*/
dcd_event_setup_received(0, (uint8_t*)userMemBuf, true);
pcd_clear_rx_ep_ctr(USB, EPindex);
}
else if ((wEPVal & USB_EP_CTR_RX) != 0U) // OUT