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Bluetooth Device: Issue ZLP on ACL IN ep when transfer is multiple of endpoint max packet size

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This commit is contained in:
Donatien Garnier 2024-08-29 16:43:42 +00:00
parent 64e62bad0d
commit cef4c466b3
1 changed files with 38 additions and 9 deletions
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47
src/class/bth/bth_device.c
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@ -42,10 +42,14 @@ typedef struct
uint8_t itf_num;
uint8_t ep_ev;
uint8_t ep_acl_in;
uint16_t ep_acl_in_pkt_sz;
uint8_t ep_acl_out;
uint8_t ep_voice[2]; // Not used yet
uint8_t ep_voice_size[2][CFG_TUD_BTH_ISO_ALT_COUNT];
// Previous amount of bytes sent when issuing ZLP
uint32_t prev_xferred_bytes;
// Endpoint Transfer buffer
CFG_TUSB_MEM_ALIGN bt_hci_cmd_t hci_cmd;
CFG_TUSB_MEM_ALIGN uint8_t epout_buf[CFG_TUD_BTH_DATA_EPSIZE];
@ -127,11 +131,25 @@ uint16_t btd_open(uint8_t rhport, tusb_desc_interface_t const *itf_desc, uint16_
TU_ASSERT(usbd_edpt_open(rhport, desc_ep), 0);
_btd_itf.ep_ev = desc_ep->bEndpointAddress;
// Open endpoint pair
TU_ASSERT(usbd_open_edpt_pair(rhport, tu_desc_next(desc_ep), 2, TUSB_XFER_BULK, &_btd_itf.ep_acl_out,
&_btd_itf.ep_acl_in), 0);
desc_ep = (tusb_desc_endpoint_t const *)tu_desc_next(desc_ep);
itf_desc = (tusb_desc_interface_t const *)tu_desc_next(tu_desc_next(tu_desc_next(desc_ep)));
// Open endpoint pair
TU_ASSERT(usbd_open_edpt_pair(rhport, (uint8_t const *)desc_ep, 2,
TUSB_XFER_BULK, &_btd_itf.ep_acl_out,
&_btd_itf.ep_acl_in),
0);
// Save acl in endpoint max packet size
tusb_desc_endpoint_t const *desc_ep_acl_in = desc_ep;
for (size_t p = 0; p < 2; p++) {
if (tu_edpt_dir(desc_ep_acl_in->bEndpointAddress) == TUSB_DIR_IN) {
_btd_itf.ep_acl_in_pkt_sz = tu_edpt_packet_size(desc_ep_acl_in);
break;
}
desc_ep_acl_in = (tusb_desc_endpoint_t const *)tu_desc_next(desc_ep_acl_in);
}
itf_desc = (tusb_desc_interface_t const *)tu_desc_next(tu_desc_next(desc_ep));
// Prepare for incoming data from host
TU_ASSERT(usbd_edpt_xfer(rhport, _btd_itf.ep_acl_out, _btd_itf.epout_buf, CFG_TUD_BTH_DATA_EPSIZE), 0);
@ -238,10 +256,8 @@ bool btd_control_xfer_cb(uint8_t rhport, uint8_t stage, tusb_control_request_t c
return true;
}
bool btd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint32_t xferred_bytes)
{
(void)result;
bool btd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result,
uint32_t xferred_bytes) {
// received new data from host
if (ep_addr == _btd_itf.ep_acl_out)
{
@ -256,7 +272,20 @@ bool btd_xfer_cb(uint8_t rhport, uint8_t ep_addr, xfer_result_t result, uint32_t
}
else if (ep_addr == _btd_itf.ep_acl_in)
{
if (tud_bt_acl_data_sent_cb) tud_bt_acl_data_sent_cb((uint16_t)xferred_bytes);
if ((result == XFER_RESULT_SUCCESS) && (xferred_bytes > 0) &&
((xferred_bytes & (_btd_itf.ep_acl_in_pkt_sz - 1)) == 0)) {
// Save number of transferred bytes
_btd_itf.prev_xferred_bytes = xferred_bytes;
// Send zero-length packet
tud_bt_acl_data_send(NULL, 0);
} else if (tud_bt_acl_data_sent_cb) {
if (xferred_bytes == 0) {
xferred_bytes = _btd_itf.prev_xferred_bytes;
_btd_itf.prev_xferred_bytes = 0;
}
tud_bt_acl_data_sent_cb((uint16_t)xferred_bytes);
}
}
return true;