mirror of
https://github.com/felis/USB_Host_Shield_2.0.git
synced 2024-03-22 11:31:26 +01:00
329 lines
10 KiB
C++
329 lines
10 KiB
C++
/* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved.
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This software may be distributed and modified under the terms of the GNU
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General Public License version 2 (GPL2) as published by the Free Software
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Foundation and appearing in the file GPL2.TXT included in the packaging of
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this file. Please note that GPL2 Section 2[b] requires that all works based
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on this software must also be made publicly available under the terms of
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the GPL2 ("Copyleft").
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Contact information
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-------------------
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Circuits At Home, LTD
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Web : http://www.circuitsathome.com
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e-mail : support@circuitsathome.com
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*/
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#include "cdcftdi.h"
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const uint8_t FTDI::epDataInIndex = 1;
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const uint8_t FTDI::epDataOutIndex = 2;
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const uint8_t FTDI::epInterruptInIndex = 3;
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FTDI::FTDI(USB *p, FTDIAsyncOper *pasync) :
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pAsync(pasync),
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pUsb(p),
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bAddress(0),
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bNumEP(1),
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wFTDIType(0) {
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for (uint8_t i = 0; i < FTDI_MAX_ENDPOINTS; i++) {
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epInfo[i].epAddr = 0;
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epInfo[i].maxPktSize = (i) ? 0 : 8;
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epInfo[i].epAttribs = 0;
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//if (!i)
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epInfo[i].bmNakPower = USB_NAK_MAX_POWER;
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}
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if (pUsb)
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pUsb->RegisterDeviceClass(this);
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}
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uint8_t FTDI::Init(uint8_t parent, uint8_t port, bool lowspeed) {
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const uint8_t constBufSize = sizeof (USB_DEVICE_DESCRIPTOR);
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uint8_t buf[constBufSize];
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uint8_t rcode;
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UsbDevice *p = NULL;
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EpInfo *oldep_ptr = NULL;
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//uint8_t len = 0;
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//uint16_t cd_len = 0;
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uint8_t num_of_conf; // number of configurations
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//uint8_t num_of_intf; // number of interfaces
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AddressPool &addrPool = pUsb->GetAddressPool();
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USBTRACE("FTDI Init\r\n");
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if (bAddress)
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return USB_ERROR_CLASS_INSTANCE_ALREADY_IN_USE;
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// Get pointer to pseudo device with address 0 assigned
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p = addrPool.GetUsbDevicePtr(0);
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if (!p)
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return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;
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if (!p->epinfo) {
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USBTRACE("epinfo\r\n");
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return USB_ERROR_EPINFO_IS_NULL;
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}
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// Save old pointer to EP_RECORD of address 0
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oldep_ptr = p->epinfo;
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// Temporary assign new pointer to epInfo to p->epinfo in order to avoid toggle inconsistence
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p->epinfo = epInfo;
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p->lowspeed = lowspeed;
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// Get device descriptor
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rcode = pUsb->getDevDescr(0, 0, sizeof (USB_DEVICE_DESCRIPTOR), (uint8_t*)buf);
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// Restore p->epinfo
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p->epinfo = oldep_ptr;
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if (rcode)
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goto FailGetDevDescr;
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if (((USB_DEVICE_DESCRIPTOR*)buf)->idVendor != FTDI_VID || ((USB_DEVICE_DESCRIPTOR*)buf)->idProduct != FTDI_PID)
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return USB_DEV_CONFIG_ERROR_DEVICE_NOT_SUPPORTED;
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// Save type of FTDI chip
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wFTDIType = ((USB_DEVICE_DESCRIPTOR*)buf)->bcdDevice;
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// Allocate new address according to device class
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bAddress = addrPool.AllocAddress(parent, false, port);
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if (!bAddress)
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return USB_ERROR_OUT_OF_ADDRESS_SPACE_IN_POOL;
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// Extract Max Packet Size from the device descriptor
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epInfo[0].maxPktSize = (uint8_t)((USB_DEVICE_DESCRIPTOR*)buf)->bMaxPacketSize0;
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// Assign new address to the device
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rcode = pUsb->setAddr(0, 0, bAddress);
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if (rcode) {
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p->lowspeed = false;
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addrPool.FreeAddress(bAddress);
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bAddress = 0;
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USBTRACE2("setAddr:", rcode);
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return rcode;
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}
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USBTRACE2("Addr:", bAddress);
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p->lowspeed = false;
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p = addrPool.GetUsbDevicePtr(bAddress);
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if (!p)
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return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;
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p->lowspeed = lowspeed;
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num_of_conf = ((USB_DEVICE_DESCRIPTOR*)buf)->bNumConfigurations;
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// Assign epInfo to epinfo pointer
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rcode = pUsb->setEpInfoEntry(bAddress, 1, epInfo);
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if (rcode)
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goto FailSetDevTblEntry;
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USBTRACE2("NC:", num_of_conf);
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for (uint8_t i = 0; i < num_of_conf; i++) {
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HexDumper<USBReadParser, uint16_t, uint16_t> HexDump;
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ConfigDescParser < 0xFF, 0xFF, 0xFF, CP_MASK_COMPARE_ALL> confDescrParser(this);
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rcode = pUsb->getConfDescr(bAddress, 0, i, &HexDump);
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if (rcode)
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goto FailGetConfDescr;
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rcode = pUsb->getConfDescr(bAddress, 0, i, &confDescrParser);
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if (rcode)
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goto FailGetConfDescr;
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if (bNumEP > 1)
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break;
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} // for
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if (bNumEP < 2)
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return USB_DEV_CONFIG_ERROR_DEVICE_NOT_SUPPORTED;
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USBTRACE2("NumEP:", bNumEP);
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// Assign epInfo to epinfo pointer
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rcode = pUsb->setEpInfoEntry(bAddress, bNumEP, epInfo);
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USBTRACE2("Conf:", bConfNum);
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// Set Configuration Value
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rcode = pUsb->setConf(bAddress, 0, bConfNum);
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if (rcode)
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goto FailSetConfDescr;
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rcode = pAsync->OnInit(this);
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if (rcode)
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goto FailOnInit;
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USBTRACE("FTDI configured\r\n");
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bPollEnable = true;
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return 0;
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FailGetDevDescr:
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NotifyFailGetDevDescr();
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goto Fail;
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FailSetDevTblEntry:
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NotifyFailSetDevTblEntry();
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goto Fail;
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FailGetConfDescr:
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NotifyFailGetConfDescr();
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goto Fail;
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FailSetConfDescr:
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NotifyFailSetConfDescr();
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goto Fail;
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FailOnInit:
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USBTRACE("OnInit:");
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Fail:
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NotifyFail(rcode);
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Release();
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return rcode;
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}
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void FTDI::EndpointXtract(uint8_t conf, uint8_t iface, uint8_t alt, uint8_t proto, const USB_ENDPOINT_DESCRIPTOR *pep) {
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ErrorMessage<uint8_t > (PSTR("Conf.Val"), conf);
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ErrorMessage<uint8_t > (PSTR("Iface Num"), iface);
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ErrorMessage<uint8_t > (PSTR("Alt.Set"), alt);
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bConfNum = conf;
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uint8_t index;
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if ((pep->bmAttributes & 0x03) == 3 && (pep->bEndpointAddress & 0x80) == 0x80)
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index = epInterruptInIndex;
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else
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if ((pep->bmAttributes & 0x02) == 2)
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index = ((pep->bEndpointAddress & 0x80) == 0x80) ? epDataInIndex : epDataOutIndex;
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else
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return;
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// Fill in the endpoint info structure
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epInfo[index].epAddr = (pep->bEndpointAddress & 0x0F);
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epInfo[index].maxPktSize = (uint8_t)pep->wMaxPacketSize;
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epInfo[index].epAttribs = 0;
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bNumEP++;
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PrintEndpointDescriptor(pep);
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}
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uint8_t FTDI::Release() {
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pUsb->GetAddressPool().FreeAddress(bAddress);
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bAddress = 0;
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bNumEP = 1;
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qNextPollTime = 0;
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bPollEnable = false;
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return 0;
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}
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uint8_t FTDI::Poll() {
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uint8_t rcode = 0;
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//if (!bPollEnable)
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// return 0;
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//if (qNextPollTime <= millis())
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//{
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// Serial.println(bAddress, HEX);
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// qNextPollTime = millis() + 100;
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//}
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return rcode;
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}
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uint8_t FTDI::SetBaudRate(uint32_t baud) {
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uint16_t baud_value, baud_index = 0;
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uint32_t divisor3;
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divisor3 = 48000000 / 2 / baud; // divisor shifted 3 bits to the left
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if (wFTDIType == FT232AM) {
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if ((divisor3 & 0x7) == 7)
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divisor3++; // round x.7/8 up to x+1
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baud_value = divisor3 >> 3;
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divisor3 &= 0x7;
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if (divisor3 == 1) baud_value |= 0xc000;
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else // 0.125
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if (divisor3 >= 4) baud_value |= 0x4000;
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else // 0.5
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if (divisor3 != 0) baud_value |= 0x8000; // 0.25
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if (baud_value == 1) baud_value = 0; /* special case for maximum baud rate */
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} else {
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static const unsigned char divfrac [8] = {0, 3, 2, 0, 1, 1, 2, 3};
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static const unsigned char divindex[8] = {0, 0, 0, 1, 0, 1, 1, 1};
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baud_value = divisor3 >> 3;
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baud_value |= divfrac [divisor3 & 0x7] << 14;
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baud_index = divindex[divisor3 & 0x7];
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/* Deal with special cases for highest baud rates. */
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if (baud_value == 1) baud_value = 0;
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else // 1.0
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if (baud_value == 0x4001) baud_value = 1; // 1.5
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}
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USBTRACE2("baud_value:", baud_value);
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USBTRACE2("baud_index:", baud_index);
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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);
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}
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uint8_t FTDI::SetModemControl(uint16_t signal) {
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return pUsb->ctrlReq(bAddress, 0, bmREQ_FTDI_OUT, FTDI_SIO_MODEM_CTRL, signal & 0xff, signal >> 8, 0, 0, 0, NULL, NULL);
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}
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uint8_t FTDI::SetFlowControl(uint8_t protocol, uint8_t xon, uint8_t xoff) {
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return pUsb->ctrlReq(bAddress, 0, bmREQ_FTDI_OUT, FTDI_SIO_SET_FLOW_CTRL, xon, xoff, protocol << 8, 0, 0, NULL, NULL);
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}
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uint8_t FTDI::SetData(uint16_t databm) {
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return pUsb->ctrlReq(bAddress, 0, bmREQ_FTDI_OUT, FTDI_SIO_SET_DATA, databm & 0xff, databm >> 8, 0, 0, 0, NULL, NULL);
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}
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uint8_t FTDI::RcvData(uint16_t *bytes_rcvd, uint8_t *dataptr) {
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return pUsb->inTransfer(bAddress, epInfo[epDataInIndex].epAddr, bytes_rcvd, dataptr);
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}
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uint8_t FTDI::SndData(uint16_t nbytes, uint8_t *dataptr) {
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return pUsb->outTransfer(bAddress, epInfo[epDataOutIndex].epAddr, nbytes, dataptr);
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}
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void FTDI::PrintEndpointDescriptor(const USB_ENDPOINT_DESCRIPTOR* ep_ptr) {
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Notify(PSTR("Endpoint descriptor:"), 0x80);
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Notify(PSTR("\r\nLength:\t\t"), 0x80);
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PrintHex<uint8_t > (ep_ptr->bLength, 0x80);
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Notify(PSTR("\r\nType:\t\t"), 0x80);
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PrintHex<uint8_t > (ep_ptr->bDescriptorType, 0x80);
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Notify(PSTR("\r\nAddress:\t"), 0x80);
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PrintHex<uint8_t > (ep_ptr->bEndpointAddress, 0x80);
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Notify(PSTR("\r\nAttributes:\t"), 0x80);
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PrintHex<uint8_t > (ep_ptr->bmAttributes, 0x80);
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Notify(PSTR("\r\nMaxPktSize:\t"), 0x80);
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PrintHex<uint16_t > (ep_ptr->wMaxPacketSize, 0x80);
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Notify(PSTR("\r\nPoll Intrv:\t"), 0x80);
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PrintHex<uint8_t > (ep_ptr->bInterval, 0x80);
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Notify(PSTR("\r\n"), 0x80);
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}
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