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Split USB_Component from USB_Emulation and add CCID_Emulation

This commit is contained in:
Harald Welte 2019-11-14 08:23:19 +01:00
parent 10ce350e47
commit af4236db1f
3 changed files with 372 additions and 189 deletions
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213
demo/USB_Demo.ttcn
View File

@ -4,253 +4,88 @@ import from USB_Types all;
import from USB_Templates all;
import from USB_PortType all;
import from USB_PortTypes all;
import from USB_Component all;
type component USB_CT {
port USB_PT USB;
var integer g_dev_hdl := 42;
var integer g_next_req_hdl := 23;
type component Demo_CT extends USB_CT {
}
modulepar {
hexstring mp_vendor_id := '138a'H;
hexstring mp_product_id := '0017'H;
hexstring mp_vendor_id := '1d50'H;
hexstring mp_product_id := '6141'H;
}
function f_init_usb() runs on USB_CT {
map(self:USB, system:USB);
var USB_result res;
var integer req_hdl := f_usb_get_req_hdl();
USB.send(ts_USB_open_vid_pid(hex2int(mp_vendor_id), hex2int(mp_product_id),
device_hdl := g_dev_hdl, req_hdl := req_hdl));
alt {
[] USB.receive(tr_USB_result(req_hdl := req_hdl, device_hdl := g_dev_hdl)) -> value res {
log("Received ", res);
}
[] USB.receive {
testcase.stop("Couldn't open requested USB device");
}
}
f_usb_init_vid_pid(mp_vendor_id, mp_product_id);
}
template (value) USB_transfer ts_UsbXfer_DevReq(template (value) USB_DeviceRequest req,
integer device_hdl, integer xfer_hdl) := {
device_hdl := device_hdl,
transfer_hdl := xfer_hdl,
endpoint := 0,
ttype := USB_TRANSFER_TYPE_CONTROL,
data := enc_USB_DeviceRequest(valueof(req)),
timeout_msec := 1000
}
template USB_transfer_compl tr_UsbXfer_compl(template USB_endpoint ep := ?,
template USB_transfer_type ttype := ?,
template USB_transfer_status sts := ?,
template integer device_hdl := ?,
template integer xfer_hdl := ?) := {
device_hdl := device_hdl,
transfer_hdl := xfer_hdl,
endpoint := ep,
ttype := ttype,
data := ?,
status := sts
}
function f_usb_get_req_hdl() runs on USB_CT return integer
{
var integer i := g_next_req_hdl;
g_next_req_hdl := g_next_req_hdl + 1;
return i;
}
function f_usb_claim_interface(integer dev_hdl, integer bInterface)
runs on USB_CT {
var USB_result res;
var integer req_hdl := f_usb_get_req_hdl();
USB.send(ts_USB_claim_interface(dev_hdl, bInterface, req_hdl));
USB.receive(USB_result:{req_hdl, dev_hdl, ?}) -> value res { log("Received ", res); }
}
/* Send a USB Device Request and wait for its completion to arrive */
private function f_xceive_DevReq(template (value) USB_DeviceRequest req)
runs on USB_CT return USB_transfer_compl
{
var USB_transfer_compl tc;
var integer req_hdl := f_usb_get_req_hdl();
USB.send(ts_UsbXfer_DevReq(req, g_dev_hdl, req_hdl));
alt {
[] USB.receive(tr_UsbXfer_compl(0, ?, ?, g_dev_hdl, req_hdl)) -> value tc { }
[] USB.receive {
testcase.stop("Received unexpected primitive from USB");
}
}
return tc;
}
/* Send a USB Device Request and expect it to fail with a certain transfer status */
private function f_DevReq_exp_fail(template (value) USB_DeviceRequest req,
template USB_transfer_status sts := USB_TRANSFER_STALL)
runs on USB_CT
{
var USB_transfer_compl tc := f_xceive_DevReq(req);
if (match(tc.status, sts)) {
setverdict(pass);
} else {
setverdict(fail, "Unexpected USB transfer status ", tc.status);
}
}
private function f_get_desc(USB_DescriptorType dtype, integer idx, integer len)
runs on USB_CT return octetstring
{
var USB_transfer_compl tc;
var integer req_hdl := f_usb_get_req_hdl();
USB.send(ts_UsbXfer_DevReq(ts_DevReq_GET_DESCRIPTOR(dtype, idx, len), g_dev_hdl, req_hdl));
alt {
[] USB.receive(tr_UsbXfer_compl(0, USB_TRANSFER_TYPE_CONTROL, USB_TRANSFER_COMPLETED, g_dev_hdl, req_hdl)) -> value tc {
var octetstring raw_desc := substr(tc.data, 8, lengthof(tc.data)-8);
return raw_desc;
}
[] USB.receive(tr_UsbXfer_compl(0, ?, ?, g_dev_hdl, req_hdl)) -> value tc{
setverdict(fail, "Transfer completed unsuccessfully: ", tc);
}
}
return ''O;
}
function f_usb_get_desc_std(USB_DescriptorType dtype, integer idx, integer len)
runs on USB_CT return USB_StandardDescriptors
{
var octetstring raw := f_get_desc(dtype, idx, len);
return dec_USB_StandardDescriptors(raw);
}
private function f_get_desc_exp_fail(USB_DescriptorType dtype, integer idx, integer len,
template USB_transfer_status exp_status := USB_TRANSFER_STALL)
runs on USB_CT
{
f_DevReq_exp_fail(ts_DevReq_GET_DESCRIPTOR(dtype, idx, len), exp_status);
}
private function f_get_config()
runs on USB_CT return integer {
var USB_transfer_compl tc;
var integer req_hdl := f_usb_get_req_hdl();
USB.send(ts_UsbXfer_DevReq(ts_DevReq_GET_CONFIGURATION, g_dev_hdl, req_hdl));
alt {
[] USB.receive(tr_UsbXfer_compl(0, USB_TRANSFER_TYPE_CONTROL, USB_TRANSFER_COMPLETED, g_dev_hdl, req_hdl)) -> value tc {
var octetstring raw_desc := substr(tc.data, 8, lengthof(tc.data)-8);
return oct2int(raw_desc[0]);
}
[] USB.receive(tr_UsbXfer_compl(0, ?, ?, g_dev_hdl, req_hdl)) -> value tc{
setverdict(fail, "Transfer completed unsuccessfully: ", tc);
}
}
return -1;
};
private function f_get_interface(integer intf)
runs on USB_CT return integer {
var USB_transfer_compl tc;
var integer req_hdl := f_usb_get_req_hdl();
USB.send(ts_UsbXfer_DevReq(ts_DevReq_GET_INTERFACE(intf), g_dev_hdl, req_hdl));
alt {
[] USB.receive(tr_UsbXfer_compl(0, USB_TRANSFER_TYPE_CONTROL, USB_TRANSFER_COMPLETED, g_dev_hdl, req_hdl)) -> value tc {
var octetstring raw_desc := substr(tc.data, 8, lengthof(tc.data)-8);
return oct2int(raw_desc[0]);
}
[] USB.receive(tr_UsbXfer_compl(0, ?, ?, g_dev_hdl, req_hdl)) -> value tc{
setverdict(fail, "Transfer completed unsuccessfully: ", tc);
}
}
return -1;
};
private function f_get_status(USB_RequestType_Recipient recipient, u16le_t wIndex)
runs on USB_CT return integer
{
var USB_transfer_compl tc;
var integer req_hdl := f_usb_get_req_hdl();
USB.send(ts_UsbXfer_DevReq(ts_DevReq_GET_STATUS(recipient, wIndex), g_dev_hdl, req_hdl));
alt {
[] USB.receive(tr_UsbXfer_compl(0, USB_TRANSFER_TYPE_CONTROL, USB_TRANSFER_COMPLETED, g_dev_hdl, req_hdl)) -> value tc {
var octetstring raw_desc := substr(tc.data, 8, lengthof(tc.data)-8);
return oct2int(raw_desc);
}
[] USB.receive(tr_UsbXfer_compl(0, USB_TRANSFER_TYPE_CONTROL, ?, g_dev_hdl, req_hdl)) -> value tc{
setverdict(fail, "Transfer completed unsuccessfully: ", tc);
}
}
return -1;
}
testcase TC_get_desc_device() runs on USB_CT {
testcase TC_get_desc_device() runs on Demo_CT {
f_init_usb();
var USB_StandardDescriptors descs;
descs := f_usb_get_desc_std(USB_DescriptorType_DEVICE, 0, 256);
/* FIXME: do some verifications and set veridct */
setverdict(pass);
}
testcase TC_get_desc_device_illegal_idx() runs on USB_CT {
testcase TC_get_desc_device_illegal_idx() runs on Demo_CT {
f_init_usb();
f_get_desc_exp_fail(USB_DescriptorType_DEVICE, 23, 256);
f_usb_get_desc_exp_fail(USB_DescriptorType_DEVICE, 23, 256);
}
testcase TC_get_desc_config() runs on USB_CT {
testcase TC_get_desc_config() runs on Demo_CT {
f_init_usb();
var USB_StandardDescriptors descs;
descs := f_usb_get_desc_std(USB_DescriptorType_CONFIGURATION, 0, 256);
/* FIXME: do some verifications and set veridct */
setverdict(pass);
}
testcase TC_get_desc_config_illegal_idx() runs on USB_CT {
testcase TC_get_desc_config_illegal_idx() runs on Demo_CT {
f_init_usb();
f_get_desc_exp_fail(USB_DescriptorType_CONFIGURATION, 23, 256);
f_usb_get_desc_exp_fail(USB_DescriptorType_CONFIGURATION, 23, 256);
}
testcase TC_get_config() runs on USB_CT {
testcase TC_get_config() runs on Demo_CT {
f_init_usb();
var integer cfg_num := f_get_config();
var integer cfg_num := f_usb_get_config();
if (cfg_num == 0) {
setverdict(pass);
} else {
setverdict(fail, "unexpected configuration: ", cfg_num);
}
}
testcase TC_get_interface() runs on USB_CT {
testcase TC_get_interface() runs on Demo_CT {
f_init_usb();
var integer altsett_num := f_get_interface(0);
var integer altsett_num := f_usb_get_interface(0);
if (altsett_num == 0) {
setverdict(pass);
} else {
setverdict(fail, "unexpected interface altsetting: ", altsett_num);
}
}
testcase TC_get_status() runs on USB_CT {
testcase TC_get_status() runs on Demo_CT {
f_init_usb();
/* valid get_status on device */
f_get_status(RequestRecipient_Device, 0);
f_usb_get_status(RequestRecipient_Device, 0);
/* valid get_status on interface */
f_get_status(RequestRecipient_Interface, 0);
f_usb_get_status(RequestRecipient_Interface, 0);
/* valid get_status on endpoint */
f_get_status(RequestRecipient_Endpoint, 1);
f_usb_get_status(RequestRecipient_Endpoint, 1);
}
testcase TC_get_status_invalid() runs on USB_CT {
testcase TC_get_status_invalid() runs on Demo_CT {
f_init_usb();
f_DevReq_exp_fail(ts_DevReq_GET_STATUS(RequestRecipient_Device, 1));
f_usb_dev_req_exp_fail(ts_DevReq_GET_STATUS(RequestRecipient_Device, 1));
/* Gets blocked by kernel USB? */
//f_DevReq_exp_fail(ts_DevReq_GET_STATUS(RequestRecipient_Interface, 100));
//f_DevReq_exp_fail(ts_DevReq_GET_STATUS(RequestRecipient_Endpoint, 100));
//f_usb_dev_req_exp_fail(ts_DevReq_GET_STATUS(RequestRecipient_Interface, 100));
//f_usb_dev_req_exp_fail(ts_DevReq_GET_STATUS(RequestRecipient_Endpoint, 100));
}
testcase TC_foobar() runs on USB_CT {
testcase TC_foobar() runs on Demo_CT {
var USB_result res;
f_init_usb();

163
src/CCID_Emulation.ttcn Normal file
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@ -0,0 +1,163 @@
module CCID_Emulation {
/* This module implements multiplexing/demultiplexing of USB CCID, enabling different
* TTCN-3 test components to talk to different CCID slots
*
* (C) 2019 by Harald Welte <laforge@gnumonks.org>
* All rights reserved.
*/
import from General_Types all;
import from Osmocom_Types all;
import from USB_Types all;
import from USB_Templates all;
import from USB_PortType all;
import from USB_PortTypes all;
import from USB_Component all;
import from CCID_Types all;
import from CCID_Templates all;
type enumerated CCID_Emulation_Event_UpDown {
CCID_EVENT_UP,
CCID_EVENT_DOWN
};
type union CCID_Emulation_Event {
CCID_Emulation_Event_UpDown up_down
};
type port CCID_SLOT_PT message {
inout CCID_PDU, CCID_Emulation_Event;
} with { extension "internal" }
type component CCID_Emulation_CT extends USB_CT {
var integer g_interface;
var integer g_ep_in;
var integer g_ep_out;
var integer g_ep_irq;
var integer g_next_bseq := 0;
/* ports to the test components; one for each theoretically possible slot */
port CCID_SLOT_PT SLOT[256];
}
private const octetstring c_oct261 := '000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'O;
private function f_usb_submit_xfer(USB_endpoint ep, octetstring data := c_oct261,
USB_transfer_type ttype := USB_TRANSFER_TYPE_BULK,
integer tout_ms := 30000) runs on CCID_Emulation_CT
{
var integer req_hdl := f_usb_get_req_hdl();
var USB_transfer xfer := {
device_hdl := g_dev_hdl,
transfer_hdl := req_hdl,
endpoint := ep,
ttype := ttype,
data := data,
timeout_msec := tout_ms
};
USB.send(xfer);
}
function main() runs on CCID_Emulation_CT {
var USB_transfer_compl tc;
var CCID_PDU ccid_in, ccid_out;
var integer i, v_i;
f_usb_init_vid_pid('1d50'H, '6141'H);
/* FIXME: get device descriptor; find CCID interface; find endpoints */
g_interface := 0;
g_ep_out := hex2int('02'H);
g_ep_in := hex2int('83'H);
g_ep_irq := hex2int('84'H);
f_usb_claim_interface(g_dev_hdl, g_interface);
/* submit xfer fro IN and IRQ endpoints */
f_usb_submit_xfer(g_ep_in);
f_usb_submit_xfer(g_ep_irq, ttype := USB_TRANSFER_TYPE_INTERRUPT);
/* let everyone know we're alive and kicking */
for (i := 0; i < 256; i := i+1) {
if (SLOT[i].checkstate("Connected")) {
SLOT[i].send(CCID_Emulation_Event:{up_down:=CCID_EVENT_UP});
}
}
while (true) {
alt {
[] USB.receive(tr_UsbXfer_compl(g_ep_out, USB_TRANSFER_TYPE_BULK, USB_TRANSFER_COMPLETED,
g_dev_hdl, ?)) -> value tc {
/* do nothing; normal completion of OUT transfer */
}
[] USB.receive(tr_UsbXfer_compl(g_ep_in, USB_TRANSFER_TYPE_BULK, USB_TRANSFER_COMPLETED,
g_dev_hdl, ?)) -> value tc {
/* Submit another IN transfer */
f_usb_submit_xfer(g_ep_in);
/* forward to slot-specific port */
ccid_in := dec_CCID_PDU(tc.data);
SLOT[ccid_in.hdr.bSlot].send(ccid_in);
}
[] USB.receive(tr_UsbXfer_compl(g_ep_irq, USB_TRANSFER_TYPE_INTERRUPT,
USB_TRANSFER_COMPLETED, g_dev_hdl, ?)) -> value tc {
/* Submit another IRQ transfer */
f_usb_submit_xfer(g_ep_irq);
/* forward to all slot-specific ports with connected components */
/*
ccid_in := dec_CCID_PDU(tc.data);
for (i := 0; i < 256; i := i+1) {
if (SLOT[i].checkstate("Connected")) {
SLOT[i].send(ccid_in);
}
}
*/
}
[] USB.receive(tr_UsbXfer_compl(?, ?, USB_TRANSFER_ERROR, g_dev_hdl, ?)) -> value tc {
setverdict(fail, "Unexpected USB_TRANSFER_ERROR on EP ", int2hex(tc.endpoint, 2));
mtc.stop;
}
[] USB.receive(tr_UsbXfer_compl(?, ?, USB_TRANSFER_TIMED_OUT, g_dev_hdl, ?)) -> value tc {
setverdict(fail, "Unexpected USB_TRANSFER_TIMED_OUT on EP ", int2hex(tc.endpoint, 2));
mtc.stop;
}
[] USB.receive(tr_UsbXfer_compl(?, ?, USB_TRANSFER_OVERFLOW, g_dev_hdl, ?)) -> value tc {
setverdict(fail, "Unexpected USB_TRANSFER_OVERFLOW on EP ", int2hex(tc.endpoint, 2));
mtc.stop;
}
[] USB.receive(tr_UsbXfer_compl(?, ?, ?, g_dev_hdl, ?)) -> value tc {
setverdict(fail, "Unexpected USB Endpoint ", int2hex(tc.endpoint, 2));
mtc.stop;
}
[] USB.receive(tr_UsbXfer_compl(?, ?, ?, ?, ?)) -> value tc {
setverdict(fail, "Unexpected USB Device ", tc.device_hdl);
mtc.stop;
}
[] USB.receive {
setverdict(fail, "Unexpected Message from USB");
mtc.stop;
}
[] any from SLOT.receive(CCID_PDU:?) -> value ccid_out @index value v_i {
var octetstring bin;
ccid_out.hdr.bSlot := v_i;
ccid_out.hdr.bSeq := g_next_bseq;
g_next_bseq := (g_next_bseq + 1) mod 256;
bin := enc_CCID_PDU(ccid_out);
f_usb_submit_xfer(g_ep_out, bin, tout_ms := 3000);
}
} /* alt */
} /* while (true) */
}
}

185
src/USB_Component.ttcn Normal file
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@ -0,0 +1,185 @@
module USB_Component {
import from General_Types all;
import from USB_Types all;
import from USB_Templates all;
import from USB_PortType all;
import from USB_PortTypes all;
type component USB_CT {
port USB_PT USB;
var integer g_dev_hdl := 42;
var integer g_next_req_hdl := 13;
}
function f_usb_init_vid_pid(HEX4n vendor_id, HEX4n product_id) runs on USB_CT {
map(self:USB, system:USB);
var USB_result res;
var integer req_hdl := f_usb_get_req_hdl();
USB.send(ts_USB_open_vid_pid(hex2int(vendor_id), hex2int(product_id),
device_hdl := g_dev_hdl, req_hdl := req_hdl));
alt {
[] USB.receive(tr_USB_result(req_hdl := req_hdl, device_hdl := g_dev_hdl)) -> value res {
log("Received ", res);
}
[] USB.receive {
testcase.stop("Couldn't open requested USB device");
}
}
}
template (value) USB_transfer ts_UsbXfer_DevReq(template (value) USB_DeviceRequest req,
integer device_hdl, integer xfer_hdl) := {
device_hdl := device_hdl,
transfer_hdl := xfer_hdl,
endpoint := 0,
ttype := USB_TRANSFER_TYPE_CONTROL,
data := enc_USB_DeviceRequest(valueof(req)),
timeout_msec := 1000
}
template USB_transfer_compl tr_UsbXfer_compl(template USB_endpoint ep := ?,
template USB_transfer_type ttype := ?,
template USB_transfer_status sts := ?,
template integer device_hdl := ?,
template integer xfer_hdl := ?) := {
device_hdl := device_hdl,
transfer_hdl := xfer_hdl,
endpoint := ep,
ttype := ttype,
data := ?,
status := sts
}
function f_usb_get_req_hdl() runs on USB_CT return integer
{
var integer i := g_next_req_hdl;
g_next_req_hdl := g_next_req_hdl + 1;
return i;
}
function f_usb_claim_interface(integer dev_hdl, integer bInterface)
runs on USB_CT {
var USB_result res;
var integer req_hdl := f_usb_get_req_hdl();
USB.send(ts_USB_claim_interface(dev_hdl, bInterface, req_hdl));
USB.receive(USB_result:{req_hdl, dev_hdl, ?}) -> value res { log("Received ", res); }
}
/* Send a USB Device Request and wait for its completion to arrive */
function f_usb_dev_req(template (value) USB_DeviceRequest req)
runs on USB_CT return USB_transfer_compl
{
var USB_transfer_compl tc;
var integer req_hdl := f_usb_get_req_hdl();
USB.send(ts_UsbXfer_DevReq(req, g_dev_hdl, req_hdl));
alt {
[] USB.receive(tr_UsbXfer_compl(0, ?, ?, g_dev_hdl, req_hdl)) -> value tc { }
[] USB.receive {
testcase.stop("Received unexpected primitive from USB");
}
}
return tc;
}
/* Send a USB Device Request and expect it to fail with a certain transfer status */
function f_usb_dev_req_exp_fail(template (value) USB_DeviceRequest req,
template USB_transfer_status sts := USB_TRANSFER_STALL)
runs on USB_CT
{
var USB_transfer_compl tc := f_usb_dev_req(req);
if (match(tc.status, sts)) {
setverdict(pass);
} else {
setverdict(fail, "Unexpected USB transfer status ", tc.status);
}
}
function f_usb_get_desc(USB_DescriptorType dtype, integer idx, integer len)
runs on USB_CT return octetstring
{
var USB_transfer_compl tc;
var integer req_hdl := f_usb_get_req_hdl();
USB.send(ts_UsbXfer_DevReq(ts_DevReq_GET_DESCRIPTOR(dtype, idx, len), g_dev_hdl, req_hdl));
alt {
[] USB.receive(tr_UsbXfer_compl(0, USB_TRANSFER_TYPE_CONTROL, USB_TRANSFER_COMPLETED, g_dev_hdl, req_hdl)) -> value tc {
var octetstring raw_desc := substr(tc.data, 8, lengthof(tc.data)-8);
return raw_desc;
}
[] USB.receive(tr_UsbXfer_compl(0, ?, ?, g_dev_hdl, req_hdl)) -> value tc{
setverdict(fail, "Transfer completed unsuccessfully: ", tc);
}
}
return ''O;
}
function f_usb_get_desc_std(USB_DescriptorType dtype, integer idx, integer len)
runs on USB_CT return USB_StandardDescriptors
{
var octetstring raw := f_usb_get_desc(dtype, idx, len);
return dec_USB_StandardDescriptors(raw);
}
function f_usb_get_desc_exp_fail(USB_DescriptorType dtype, integer idx, integer len,
template USB_transfer_status exp_status := USB_TRANSFER_STALL)
runs on USB_CT
{
f_usb_dev_req_exp_fail(ts_DevReq_GET_DESCRIPTOR(dtype, idx, len), exp_status);
}
function f_usb_get_config()
runs on USB_CT return integer {
var USB_transfer_compl tc;
var integer req_hdl := f_usb_get_req_hdl();
USB.send(ts_UsbXfer_DevReq(ts_DevReq_GET_CONFIGURATION, g_dev_hdl, req_hdl));
alt {
[] USB.receive(tr_UsbXfer_compl(0, USB_TRANSFER_TYPE_CONTROL, USB_TRANSFER_COMPLETED, g_dev_hdl, req_hdl)) -> value tc {
var octetstring raw_desc := substr(tc.data, 8, lengthof(tc.data)-8);
return oct2int(raw_desc[0]);
}
[] USB.receive(tr_UsbXfer_compl(0, ?, ?, g_dev_hdl, req_hdl)) -> value tc{
setverdict(fail, "Transfer completed unsuccessfully: ", tc);
}
}
return -1;
};
function f_usb_get_interface(integer intf)
runs on USB_CT return integer {
var USB_transfer_compl tc;
var integer req_hdl := f_usb_get_req_hdl();
USB.send(ts_UsbXfer_DevReq(ts_DevReq_GET_INTERFACE(intf), g_dev_hdl, req_hdl));
alt {
[] USB.receive(tr_UsbXfer_compl(0, USB_TRANSFER_TYPE_CONTROL, USB_TRANSFER_COMPLETED, g_dev_hdl, req_hdl)) -> value tc {
var octetstring raw_desc := substr(tc.data, 8, lengthof(tc.data)-8);
return oct2int(raw_desc[0]);
}
[] USB.receive(tr_UsbXfer_compl(0, ?, ?, g_dev_hdl, req_hdl)) -> value tc{
setverdict(fail, "Transfer completed unsuccessfully: ", tc);
}
}
return -1;
};
function f_usb_get_status(USB_RequestType_Recipient recipient, u16le_t wIndex)
runs on USB_CT return integer
{
var USB_transfer_compl tc;
var integer req_hdl := f_usb_get_req_hdl();
USB.send(ts_UsbXfer_DevReq(ts_DevReq_GET_STATUS(recipient, wIndex), g_dev_hdl, req_hdl));
alt {
[] USB.receive(tr_UsbXfer_compl(0, USB_TRANSFER_TYPE_CONTROL, USB_TRANSFER_COMPLETED, g_dev_hdl, req_hdl)) -> value tc {
var octetstring raw_desc := substr(tc.data, 8, lengthof(tc.data)-8);
return oct2int(raw_desc);
}
[] USB.receive(tr_UsbXfer_compl(0, USB_TRANSFER_TYPE_CONTROL, ?, g_dev_hdl, req_hdl)) -> value tc{
setverdict(fail, "Transfer completed unsuccessfully: ", tc);
}
}
return -1;
}
}