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usb-epfifo: something is actually responding now

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Making good progress. Still not reliable, but there's something to work on now.

Signed-off-by: Sean Cross <sean@xobs.io>
This commit is contained in:
Sean Cross 2019-03-04 15:46:59 +08:00
parent d18e0cba0d
commit b06cd3b807
1 changed files with 7 additions and 5 deletions
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12
src/usb-epfifo.c
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@ -120,9 +120,9 @@ void usb_connect(void) {
usb_ep_0_out_respond_write(EPF_ACK); usb_ep_0_out_respond_write(EPF_ACK);
usb_ep_0_in_respond_write(EPF_NAK); usb_ep_0_in_respond_write(EPF_NAK);
usb_ep_0_out_ev_pending_write(usb_ep_0_out_ev_enable_read()); usb_ep_0_out_ev_pending_write(usb_ep_0_out_ev_enable_read());
usb_ep_0_in_ev_pending_write(usb_ep_0_in_ev_pending_read()); usb_ep_0_in_ev_pending_write(usb_ep_0_in_ev_pending_read());
usb_ep_0_out_ev_enable_write(USB_EV_PACKET | USB_EV_ERROR); usb_ep_0_out_ev_enable_write(USB_EV_PACKET | USB_EV_ERROR);
usb_ep_0_in_ev_enable_write(USB_EV_PACKET | USB_EV_ERROR); usb_ep_0_in_ev_enable_write(USB_EV_PACKET | USB_EV_ERROR);
irq_setmask(irq_getmask() | (1 << USB_INTERRUPT)); irq_setmask(irq_getmask() | (1 << USB_INTERRUPT));
@ -151,8 +151,6 @@ static int maybe_send_more_data(int epnum) {
// Don't allow requeueing // Don't allow requeueing
if (usb_ep_0_in_respond_read() != EPF_NAK) if (usb_ep_0_in_respond_read() != EPF_NAK)
return -1; return -1;
// if (!usb_ep_0_in_ibuf_empty_read())
// return -2;
int this_offset; int this_offset;
current_to_send = current_length - current_offset; current_to_send = current_length - current_offset;
@ -163,6 +161,7 @@ static int maybe_send_more_data(int epnum) {
usb_ep_0_in_ibuf_head_write(current_data[this_offset]); usb_ep_0_in_ibuf_head_write(current_data[this_offset]);
} }
usb_ep_0_in_respond_write(EPF_ACK); usb_ep_0_in_respond_write(EPF_ACK);
usb_ep_0_out_respond_write(EPF_ACK);
return 0; return 0;
} }
@ -228,6 +227,9 @@ void usb_isr(void) {
current_offset += current_to_send; current_offset += current_to_send;
maybe_send_more_data(0); maybe_send_more_data(0);
usb_ep_0_in_ev_pending_write(ep0i_pending); usb_ep_0_in_ev_pending_write(ep0i_pending);
// Get ready to respond to the empty data byte
usb_ep_0_out_respond_write(EPF_ACK);
} }
return; return;