specchioriflesso/USB_Host_Shield_2.0
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USB_Host_Shield_2.0/cdcftdi.cpp

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/* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved.
This software may be distributed and modified under the terms of the GNU
General Public License version 2 (GPL2) as published by the Free Software
Foundation and appearing in the file GPL2.TXT included in the packaging of
this file. Please note that GPL2 Section 2[b] requires that all works based
on this software must also be made publicly available under the terms of
the GPL2 ("Copyleft").
Contact information
-------------------
Circuits At Home, LTD
Web : http://www.circuitsathome.com
e-mail : support@circuitsathome.com
*/
#include "cdcftdi.h"
const uint8_t FTDI::epDataInIndex = 1;
const uint8_t FTDI::epDataOutIndex = 2;
const uint8_t FTDI::epInterruptInIndex = 3;
FTDI::FTDI(USB *p, FTDIAsyncOper *pasync, uint16_t idProduct) :
pAsync(pasync),
pUsb(p),
bAddress(0),
bNumEP(1),
wFTDIType(0),
wIdProduct(idProduct) {
for(uint8_t i = 0; i < FTDI_MAX_ENDPOINTS; i++) {
epInfo[i].epAddr = 0;
epInfo[i].maxPktSize = (i) ? 0 : 8;
epInfo[i].bmSndToggle = 0;
epInfo[i].bmRcvToggle = 0;
epInfo[i].bmNakPower = (i==epDataInIndex) ? USB_NAK_NOWAIT: USB_NAK_MAX_POWER;
}
if(pUsb)
pUsb->RegisterDeviceClass(this);
}
uint8_t FTDI::Init(uint8_t parent, uint8_t port, bool lowspeed) {
const uint8_t constBufSize = sizeof (USB_DEVICE_DESCRIPTOR);
uint8_t buf[constBufSize];
USB_DEVICE_DESCRIPTOR * udd = reinterpret_cast<USB_DEVICE_DESCRIPTOR*>(buf);
uint8_t rcode;
UsbDevice *p = NULL;
EpInfo *oldep_ptr = NULL;
uint8_t num_of_conf; // number of configurations
AddressPool &addrPool = pUsb->GetAddressPool();
USBTRACE("FTDI Init\r\n");
if(bAddress)
return USB_ERROR_CLASS_INSTANCE_ALREADY_IN_USE;
// Get pointer to pseudo device with address 0 assigned
p = addrPool.GetUsbDevicePtr(0);
if(!p)
return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;
if(!p->epinfo) {
USBTRACE("epinfo\r\n");
return USB_ERROR_EPINFO_IS_NULL;
}
// Save old pointer to EP_RECORD of address 0
oldep_ptr = p->epinfo;
// Temporary assign new pointer to epInfo to p->epinfo in order to avoid toggle inconsistence
p->epinfo = epInfo;
p->lowspeed = lowspeed;
// Get device descriptor
rcode = pUsb->getDevDescr(0, 0, sizeof (USB_DEVICE_DESCRIPTOR), buf);
// Restore p->epinfo
p->epinfo = oldep_ptr;
if(rcode)
goto FailGetDevDescr;
if(udd->idVendor != FTDI_VID || udd->idProduct != wIdProduct)
{
USBTRACE("FTDI Init: Product not supported\r\n");
USBTRACE2("Expected VID:", FTDI_VID);
USBTRACE2("Found VID:", udd->idVendor);
USBTRACE2("Expected PID:", wIdProduct);
USBTRACE2("Found PID:", udd->idProduct);
return USB_DEV_CONFIG_ERROR_DEVICE_NOT_SUPPORTED;
}
// Save type of FTDI chip
wFTDIType = udd->bcdDevice;
// Allocate new address according to device class
bAddress = addrPool.AllocAddress(parent, false, port);
if(!bAddress)
return USB_ERROR_OUT_OF_ADDRESS_SPACE_IN_POOL;
// Extract Max Packet Size from the device descriptor
epInfo[0].maxPktSize = udd->bMaxPacketSize0;
// Assign new address to the device
rcode = pUsb->setAddr(0, 0, bAddress);
if(rcode) {
p->lowspeed = false;
addrPool.FreeAddress(bAddress);
bAddress = 0;
USBTRACE2("setAddr:", rcode);
return rcode;
}
USBTRACE2("Addr:", bAddress);
p->lowspeed = false;
p = addrPool.GetUsbDevicePtr(bAddress);
if(!p)
return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;
p->lowspeed = lowspeed;
num_of_conf = udd->bNumConfigurations;
// Assign epInfo to epinfo pointer
rcode = pUsb->setEpInfoEntry(bAddress, 1, epInfo);
if(rcode)
goto FailSetDevTblEntry;
USBTRACE2("NC:", num_of_conf);
for(uint8_t i = 0; i < num_of_conf; i++) {
HexDumper<USBReadParser, uint16_t, uint16_t> HexDump;
ConfigDescParser < 0xFF, 0xFF, 0xFF, CP_MASK_COMPARE_ALL> confDescrParser(this);
rcode = pUsb->getConfDescr(bAddress, 0, i, &HexDump);
if(rcode)
goto FailGetConfDescr;
rcode = pUsb->getConfDescr(bAddress, 0, i, &confDescrParser);
if(rcode)
goto FailGetConfDescr;
if(bNumEP > 1)
break;
} // for
if(bNumEP < 2)
return USB_DEV_CONFIG_ERROR_DEVICE_NOT_SUPPORTED;
USBTRACE2("NumEP:", bNumEP);
// Assign epInfo to epinfo pointer
rcode = pUsb->setEpInfoEntry(bAddress, bNumEP, epInfo);
USBTRACE2("Conf:", bConfNum);
// Set Configuration Value
rcode = pUsb->setConf(bAddress, 0, bConfNum);
if(rcode)
goto FailSetConfDescr;
rcode = pAsync->OnInit(this);
if(rcode)
goto FailOnInit;
USBTRACE("FTDI configured\r\n");
bPollEnable = true;
return 0;
FailGetDevDescr:
#ifdef DEBUG_USB_HOST
NotifyFailGetDevDescr();
goto Fail;
#endif
FailSetDevTblEntry:
#ifdef DEBUG_USB_HOST
NotifyFailSetDevTblEntry();
goto Fail;
#endif
FailGetConfDescr:
#ifdef DEBUG_USB_HOST
NotifyFailGetConfDescr();
goto Fail;
#endif
FailSetConfDescr:
#ifdef DEBUG_USB_HOST
NotifyFailSetConfDescr();
goto Fail;
#endif
FailOnInit:
#ifdef DEBUG_USB_HOST
USBTRACE("OnInit:");
Fail:
NotifyFail(rcode);
#endif
Release();
return rcode;
}
void FTDI::EndpointXtract(uint8_t conf, uint8_t iface, uint8_t alt, uint8_t proto, const USB_ENDPOINT_DESCRIPTOR *pep) {
ErrorMessage<uint8_t > (PSTR("Conf.Val"), conf);
ErrorMessage<uint8_t > (PSTR("Iface Num"), iface);
ErrorMessage<uint8_t > (PSTR("Alt.Set"), alt);
bConfNum = conf;
uint8_t index;
if((pep->bmAttributes & 0x03) == 3 && (pep->bEndpointAddress & 0x80) == 0x80)
index = epInterruptInIndex;
else
if((pep->bmAttributes & 0x02) == 2)
index = ((pep->bEndpointAddress & 0x80) == 0x80) ? epDataInIndex : epDataOutIndex;
else
return;
// Fill in the endpoint info structure
epInfo[index].epAddr = (pep->bEndpointAddress & 0x0F);
epInfo[index].maxPktSize = (uint8_t)pep->wMaxPacketSize;
epInfo[index].bmSndToggle = 0;
epInfo[index].bmRcvToggle = 0;
bNumEP++;
PrintEndpointDescriptor(pep);
}
uint8_t FTDI::Release() {
pUsb->GetAddressPool().FreeAddress(bAddress);
bAddress = 0;
bNumEP = 1;
qNextPollTime = 0;
bPollEnable = false;
return pAsync->OnRelease(this);
}
uint8_t FTDI::Poll() {
uint8_t rcode = 0;
//if (!bPollEnable)
// return 0;
//if (qNextPollTime <= (uint32_t)millis())
//{
// USB_HOST_SERIAL.println(bAddress, HEX);
// qNextPollTime = (uint32_t)millis() + 100;
//}
return rcode;
}
uint8_t FTDI::SetBaudRate(uint32_t baud) {
uint16_t baud_value, baud_index = 0;
uint32_t divisor3;
divisor3 = 48000000 / 2 / baud; // divisor shifted 3 bits to the left
if(wFTDIType == FT232AM) {
if((divisor3 & 0x7) == 7)
divisor3++; // round x.7/8 up to x+1
baud_value = divisor3 >> 3;
divisor3 &= 0x7;
if(divisor3 == 1) baud_value |= 0xc000;
else // 0.125
if(divisor3 >= 4) baud_value |= 0x4000;
else // 0.5
if(divisor3 != 0) baud_value |= 0x8000; // 0.25
if(baud_value == 1) baud_value = 0; /* special case for maximum baud rate */
} else {
static const uint8_t divfrac [8] = {0, 3, 2, 0, 1, 1, 2, 3};
static const uint8_t divindex[8] = {0, 0, 0, 1, 0, 1, 1, 1};
baud_value = divisor3 >> 3;
baud_value |= divfrac [divisor3 & 0x7] << 14;
baud_index = divindex[divisor3 & 0x7];
/* Deal with special cases for highest baud rates. */
if(baud_value == 1) baud_value = 0;
else // 1.0
if(baud_value == 0x4001) baud_value = 1; // 1.5
}
USBTRACE2("baud_value:", baud_value);
USBTRACE2("baud_index:", baud_index);
return pUsb->ctrlReq(bAddress, 0, bmREQ_FTDI_OUT, FTDI_SIO_SET_BAUD_RATE, baud_value & 0xff, baud_value >> 8, baud_index, 0, 0, NULL, NULL);
}
uint8_t FTDI::SetModemControl(uint16_t signal) {
return pUsb->ctrlReq(bAddress, 0, bmREQ_FTDI_OUT, FTDI_SIO_MODEM_CTRL, signal & 0xff, signal >> 8, 0, 0, 0, NULL, NULL);
}
uint8_t FTDI::SetFlowControl(uint8_t protocol, uint8_t xon, uint8_t xoff) {
return pUsb->ctrlReq(bAddress, 0, bmREQ_FTDI_OUT, FTDI_SIO_SET_FLOW_CTRL, xon, xoff, protocol << 8, 0, 0, NULL, NULL);
}
uint8_t FTDI::SetData(uint16_t databm) {
return pUsb->ctrlReq(bAddress, 0, bmREQ_FTDI_OUT, FTDI_SIO_SET_DATA, databm & 0xff, databm >> 8, 0, 0, 0, NULL, NULL);
}
uint8_t FTDI::RcvData(uint16_t *bytes_rcvd, uint8_t *dataptr) {
return pUsb->inTransfer(bAddress, epInfo[epDataInIndex].epAddr, bytes_rcvd, dataptr);
}
uint8_t FTDI::SndData(uint16_t nbytes, uint8_t *dataptr) {
return pUsb->outTransfer(bAddress, epInfo[epDataOutIndex].epAddr, nbytes, dataptr);
}
void FTDI::PrintEndpointDescriptor(const USB_ENDPOINT_DESCRIPTOR* ep_ptr) {
Notify(PSTR("Endpoint descriptor:"), 0x80);
Notify(PSTR("\r\nLength:\t\t"), 0x80);
D_PrintHex<uint8_t > (ep_ptr->bLength, 0x80);
Notify(PSTR("\r\nType:\t\t"), 0x80);
D_PrintHex<uint8_t > (ep_ptr->bDescriptorType, 0x80);
Notify(PSTR("\r\nAddress:\t"), 0x80);
D_PrintHex<uint8_t > (ep_ptr->bEndpointAddress, 0x80);
Notify(PSTR("\r\nAttributes:\t"), 0x80);
D_PrintHex<uint8_t > (ep_ptr->bmAttributes, 0x80);
Notify(PSTR("\r\nMaxPktSize:\t"), 0x80);
D_PrintHex<uint16_t > (ep_ptr->wMaxPacketSize, 0x80);
Notify(PSTR("\r\nPoll Intrv:\t"), 0x80);
D_PrintHex<uint8_t > (ep_ptr->bInterval, 0x80);
Notify(PSTR("\r\n"), 0x80);
}
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