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| author | Kevin O'Connor <kevin@koconnor.net> | 2023-10-05 00:03:07 -0400 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2023-10-05 00:47:42 -0400 |
| commit | 83ef0e135ef820f73c8579069c347953b9d6d56e (patch) | |
| tree | 69cbebcdf618a55b8ea25e101d7f380e1070099b /src/stm32 | |
| parent | 447125faae62bfad4a0e483264453a39c9ba52d8 (diff) | |
| download | kutter-83ef0e135ef820f73c8579069c347953b9d6d56e.tar.gz kutter-83ef0e135ef820f73c8579069c347953b9d6d56e.tar.xz kutter-83ef0e135ef820f73c8579069c347953b9d6d56e.zip | |
stm32: Make sure to limit tx during usbfs startup
Wait for two tx packets before startup, and make sure one of those
packets is acked before sending a third tx packet.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Diffstat (limited to 'src/stm32')
| -rw-r--r-- | src/stm32/usbfs.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/stm32/usbfs.c b/src/stm32/usbfs.c index 0ed2e0ee..ad2e7b3e 100644 --- a/src/stm32/usbfs.c +++ b/src/stm32/usbfs.c @@ -255,11 +255,12 @@ usb_send_bulk_in(void *data, uint_fast8_t len) uint32_t epr = USB_EPR[ep]; if (epr_is_dbuf_blocking(epr) && readl(&bulk_in_pop_flag)) { writel(&bulk_in_pop_flag, 0); - if (bipp & BI_START) { + if (unlikely(bipp & BI_START)) { // Two packets are always sent when starting in double // buffering mode, so wait for second packet before starting. if (bipp == (BI_START | 1)) { bulk_in_push_pos = 0; + writel(&bulk_in_pop_flag, USB_EP_KIND); // Dummy flag USB_EPR[ep] = calc_epr_bits(epr, USB_EPTX_STAT , USB_EP_TX_VALID); } |