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WIP - Add support fo CH341 Serial boards 

Added support for a another Serial type CH341.

Wip - But I do have it working so far at least with a loop back test (RX shorted to TX)

Also Rearranged some of the Claim code and added a VID:DID to Serial Type table that I use to map, such that I know some of these devices have multiple valid setups.

Will test more.  I have several more cheap USB to serial adapter arriving tomorrow.
main
Kurt Eckhardt 7 years ago
parent
de863f4991
commit
d381a5bf95
2 changed files with 351 additions and 114 deletions
Unified View Show Diff Stats
  1. +15
    -3
      USBHost_t36.h
  2. +336
    -111
      serial.cpp

+ 15
- 3
USBHost_t36.h View File

// your best effort to read chapter 4 before asking USB questions! // your best effort to read chapter 4 before asking USB questions!




//#define USBHOST_PRINT_DEBUG
#define USBHOST_PRINT_DEBUG


/************************************************/ /************************************************/
/* Data Types */ /* Data Types */
//-------------------------------------------------------------------------- //--------------------------------------------------------------------------


class USBSerial: public USBDriver, public Stream { class USBSerial: public USBDriver, public Stream {
public:
public:


// FIXME: need different USBSerial, with bigger buffers for 480 Mbit & faster speed // FIXME: need different USBSerial, with bigger buffers for 480 Mbit & faster speed
enum { BUFFER_SIZE = 648 }; // must hold at least 6 max size packets, plus 2 extra bytes enum { BUFFER_SIZE = 648 }; // must hold at least 6 max size packets, plus 2 extra bytes
USBSerial(USBHost &host) : txtimer(this) { init(); } USBSerial(USBHost &host) : txtimer(this) { init(); }
void init(); void init();
static bool check_rxtx_ep(uint32_t &rxep, uint32_t &txep); static bool check_rxtx_ep(uint32_t &rxep, uint32_t &txep);
bool init_buffers(uint32_t rsize, uint32_t tsize); bool init_buffers(uint32_t rsize, uint32_t tsize);
void ch341_setBaud(uint8_t byte_index);
private: private:
Pipe_t mypipes[3] __attribute__ ((aligned(32))); Pipe_t mypipes[3] __attribute__ ((aligned(32)));
Transfer_t mytransfers[7] __attribute__ ((aligned(32))); Transfer_t mytransfers[7] __attribute__ ((aligned(32)));
uint8_t pl2303_v2; uint8_t pl2303_v2;
uint8_t interface; uint8_t interface;
bool control_queued; bool control_queued;
enum { CDCACM, FTDI, PL2303, CH341 } sertype;
typedef enum { UNKNOWN=0, CDCACM, FTDI, PL2303, CH341 } sertype_t;
sertype_t sertype;

typedef struct {
uint16_t idVendor;
uint16_t idProduct;
sertype_t sertype;
} product_vendor_mapping_t;
static product_vendor_mapping_t pid_vid_mapping[];

}; };


//-------------------------------------------------------------------------- //--------------------------------------------------------------------------

+ 336
- 111
serial.cpp View File

#define println USBHost::println_ #define println USBHost::println_


/************************************************************/ /************************************************************/
// Control Transfer For Configuration
// Define mapping VID/PID - to Serial Device type.
/************************************************************/ /************************************************************/
typedef struct {
uint32_t dwDTERate; // Data Terminal Rate in bits per second
uint8_t bCharFormat; // 0 - 1 stop bit, 1 - 1.5 stop bits, 2 - 2 stop bits
uint8_t bParityType; // 0 - None, 1 - Odd, 2 - Even, 3 - Mark, 4 - Space
uint8_t bDataBits; // Data bits (5, 6, 7, 8 or 16)
} LINE_CODING;
USBSerial::product_vendor_mapping_t USBSerial::pid_vid_mapping[] = {
// FTDI mappings.
{0x0403, 0x6001, USBSerial::FTDI},

// PL2303
{0x67B,0x2303, USBSerial::PL2303},

// CH341
{0x4348, 0x5523, USBSerial::CH341 },
{0x1a86, 0x7523, USBSerial::CH341 },
{0x1a86, 0x5523, USBSerial::CH341 }
};



/************************************************************/ /************************************************************/
// Initialization and claiming of devices & interfaces // Initialization and claiming of devices & interfaces
println(", bDeviceProtocol = ", dev->bDeviceProtocol); println(", bDeviceProtocol = ", dev->bDeviceProtocol);
print_hexbytes(descriptors, len); print_hexbytes(descriptors, len);
if (type == 0) { if (type == 0) {
if (dev->idVendor == 0x0403 && dev->idProduct == 0x6001) {
// FTDI FT232
println("len = ", len);
if (len < 23) return false;
if (descriptors[0] != 9) return false; // length 9
if (descriptors[9] != 7) return false; // length 7
if (descriptors[10] != 5) return false; // ep desc
uint32_t rxep = descriptors[11];
if (descriptors[12] != 2) return false; // bulk type
if (descriptors[13] != 64) return false; // size 64
if (descriptors[14] != 0) return false;
if (descriptors[16] != 7) return false; // length 7
if (descriptors[17] != 5) return false; // ep desc
uint32_t txep = descriptors[18];
if (descriptors[19] != 2) return false; // bulk type
if (descriptors[20] != 64) return false; // size 64
if (descriptors[21] != 0) return false;
if (!check_rxtx_ep(rxep, txep)) return false;
print("FTDI, rxep=", rxep & 15);
println(", txep=", txep);
if (!init_buffers(64, 64)) return false;
rxpipe = new_Pipe(dev, 2, rxep & 15, 1, 64);
if (!rxpipe) return false;
txpipe = new_Pipe(dev, 2, txep, 0, 64);
if (!txpipe) {
// TODO: free rxpipe
return false;
}
sertype = FTDI;
rxpipe->callback_function = rx_callback;
queue_Data_Transfer(rxpipe, rx1, 64, this);
rxstate = 1;
if (rxsize > 128) {
queue_Data_Transfer(rxpipe, rx2, 64, this);
rxstate = 3;
}
txstate = 0;
txpipe->callback_function = tx_callback;
baudrate = 115200;
pending_control = 0x0F;
mk_setup(setup, 0x40, 0, 0, 0, 0); // reset port
queue_Control_Transfer(dev, &setup, NULL, this);
control_queued = true;
return true;
} else if ((dev->bDeviceClass == 2) && (dev->bDeviceSubClass == 0)) {
//---------------------------------------------------------------------
// CDCACM
if ((dev->bDeviceClass == 2) && (dev->bDeviceSubClass == 0)) {
// It is a communication device see if we can extract the data... // It is a communication device see if we can extract the data...
// Try some ttyACM types? // Try some ttyACM types?
// This code may be similar to MIDI code. // This code may be similar to MIDI code.
return true; return true;
} }


// See if the vendor_id:product_id is in our list of products.
sertype = UNKNOWN;
for (uint8_t i = 0; i < (sizeof(pid_vid_mapping)/sizeof(pid_vid_mapping[0])); i++) {
if ((dev->idVendor == pid_vid_mapping[i].idVendor) && (dev->idProduct == pid_vid_mapping[i].idProduct)) {
sertype = pid_vid_mapping[i].sertype;
break;
}
}
switch (sertype) {
//---------------------------------------------------------------------
// FTDI
case FTDI:
{
// FTDI FT232
println("len = ", len);
if (len < 23) return false;
if (descriptors[0] != 9) return false; // length 9
if (descriptors[9] != 7) return false; // length 7
if (descriptors[10] != 5) return false; // ep desc
uint32_t rxep = descriptors[11];
if (descriptors[12] != 2) return false; // bulk type
if (descriptors[13] != 64) return false; // size 64
if (descriptors[14] != 0) return false;
if (descriptors[16] != 7) return false; // length 7
if (descriptors[17] != 5) return false; // ep desc
uint32_t txep = descriptors[18];
if (descriptors[19] != 2) return false; // bulk type
if (descriptors[20] != 64) return false; // size 64
if (descriptors[21] != 0) return false;
if (!check_rxtx_ep(rxep, txep)) return false;
print("FTDI, rxep=", rxep & 15);
println(", txep=", txep);
if (!init_buffers(64, 64)) return false;
rxpipe = new_Pipe(dev, 2, rxep & 15, 1, 64);
if (!rxpipe) return false;
txpipe = new_Pipe(dev, 2, txep, 0, 64);
if (!txpipe) {
// TODO: free rxpipe
return false;
}
sertype = FTDI;
rxpipe->callback_function = rx_callback;
rxsize = 64;
queue_Data_Transfer(rxpipe, rx1, 64, this);
rxstate = 1;
txsize = 64;
txstate = 0;
txpipe->callback_function = tx_callback;
baudrate = 115200;
pending_control = 0x0F;
mk_setup(setup, 0x40, 0, 0, 0, 0); // reset port
queue_Control_Transfer(dev, &setup, NULL, this);
control_queued = true;
return true;
}
//------------------------------------------------------------------------
// Prolific
// TODO: Note: there are probably more vendor/product pairs.. Maybe should create table of them // TODO: Note: there are probably more vendor/product pairs.. Maybe should create table of them
if (dev->idVendor == 0x67B && dev->idProduct == 0x2303) {
// Prolific Technology, Inc. PL2303 Serial Port
println("len = ", len);
uint8_t count_end_points = descriptors[4];
if (count_end_points < 2) return false; // not enough end points
if (len < 23) return false;
if (descriptors[0] != 9) return false; // length 9
case PL2303:
{
// Prolific Technology, Inc. PL2303 Serial Port
println("len = ", len);
uint8_t count_end_points = descriptors[4];
if (count_end_points < 2) return false; // not enough end points
if (len < 23) return false;
if (descriptors[0] != 9) return false; // length 9


// Lets walk through end points and see if we
// can find an RX and TX bulk transfer end point.
//vid=67B, pid=2303
// 0 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 20 1 2 3 4 5 6 7 8 9
//09 04 00 00 03 FF 00 00 00 07 05 81 03 0A 00 01 07 05 02 02 40 00 00 07 05 83 02 40 00 00
uint32_t rxep = 0;
uint32_t txep = 0;
uint32_t descriptor_index = 9;
while (count_end_points-- && ((rxep == 0) || txep == 0)) {
if (descriptors[descriptor_index] != 7) return false; // length 7
if (descriptors[descriptor_index+1] != 5) return false; // ep desc
if ((descriptors[descriptor_index+3] == 2)
&& (descriptors[descriptor_index+4] == 64)
&& (descriptors[descriptor_index+5] == 0)) {
// have a bulk EP size
if (descriptors[descriptor_index+2] & 0x80 ) {
rxep = descriptors[descriptor_index+2];
} else {
txep = descriptors[descriptor_index+2];
// Lets walk through end points and see if we
// can find an RX and TX bulk transfer end point.
//vid=67B, pid=2303
// 0 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 20 1 2 3 4 5 6 7 8 9
//09 04 00 00 03 FF 00 00 00 07 05 81 03 0A 00 01 07 05 02 02 40 00 00 07 05 83 02 40 00 00
uint32_t rxep = 0;
uint32_t txep = 0;
uint32_t descriptor_index = 9;
while (count_end_points-- && ((rxep == 0) || txep == 0)) {
if (descriptors[descriptor_index] != 7) return false; // length 7
if (descriptors[descriptor_index+1] != 5) return false; // ep desc
if ((descriptors[descriptor_index+3] == 2)
&& (descriptors[descriptor_index+4] == 64)
&& (descriptors[descriptor_index+5] == 0)) {
// have a bulk EP size
if (descriptors[descriptor_index+2] & 0x80 ) {
rxep = descriptors[descriptor_index+2];
rxsize = descriptors[descriptor_index+4];
} else {
txep = descriptors[descriptor_index+2];
txsize = descriptors[descriptor_index+4];
}
} }
descriptor_index += 7; // setup to look at next one...
}
// Try to verify the end points.
if (!check_rxtx_ep(rxep, txep)) return false;
print("PL2303, rxep=", rxep & 15);
println(", txep=", txep);
if (!init_buffers(64, 64)) return false;
rxpipe = new_Pipe(dev, 2, rxep & 15, 1, 64);
if (!rxpipe) return false;
txpipe = new_Pipe(dev, 2, txep, 0, 64);
if (!txpipe) {
// TODO: free rxpipe
return false;
} }
descriptor_index += 7; // setup to look at next one...
}
// Try to verify the end points.
if (!check_rxtx_ep(rxep, txep)) return false;
print("FTDI, rxep=", rxep & 15);
println(", txep=", txep);
if (!init_buffers(64, 64)) return false;
rxpipe = new_Pipe(dev, 2, rxep & 15, 1, 64);
if (!rxpipe) return false;
txpipe = new_Pipe(dev, 2, txep, 0, 64);
if (!txpipe) {
// TODO: free rxpipe
return false;
}


sertype = PL2303;
rxpipe->callback_function = rx_callback;
queue_Data_Transfer(rxpipe, rx1, 64, this);
rxstate = 1;
if (rxsize > 128) {
queue_Data_Transfer(rxpipe, rx2, 64, this);
rxstate = 3;
sertype = PL2303;
rxpipe->callback_function = rx_callback;
queue_Data_Transfer(rxpipe, rx1, 64, this);
rxstate = 1;
txstate = 0;
txpipe->callback_function = tx_callback;
baudrate = 115200;

// Lets see if it will handle the same CDCACM - messages?
println("PL2303: readRegister(0x04)");
// Need to setup the data the line coding data
mk_setup(setup, 0xC0, 0x1, 0x8484, 0, 1);
queue_Control_Transfer(dev, &setup, setupdata, this);
control_queued = true;
setup_state = 1; // We are at step one of setup...
pending_control = 0x3f;
return true;
} }
txstate = 0;
txpipe->callback_function = tx_callback;
baudrate = 115200;
//------------------------------------------------------------------------
// CH341
case CH341:
{
println("len = ", len);
uint8_t count_end_points = descriptors[4];
if (count_end_points < 2) return false; // not enough end points
if (len < 23) return false;
if (descriptors[0] != 9) return false; // length 9


// Lets see if it will handle the same CDCACM - messages?
println("PL2303: readRegister(0x04)");
// Need to setup the data the line coding data
mk_setup(setup, 0xC0, 0x1, 0x8484, 0, 1);
queue_Control_Transfer(dev, &setup, setupdata, this);
control_queued = true;
setup_state = 1; // We are at step one of setup...
pending_control = 0x3f; // Maybe don't need to do...
return true;
// Lets walk through end points and see if we
// can find an RX and TX bulk transfer end point.
// vid=1A86, pid=7523, bDeviceClass = 255, bDeviceSubClass = 0, bDeviceProtocol = 0
// 0 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 20 1 2 3 4 5 6 7 8 9
//09 04 00 00 03 FF 01 02 00 07 05 82 02 20 00 00 07 05 02 02 20 00 00 07 05 81 03 08 00 01
uint32_t rxep = 0;
uint32_t txep = 0;
uint32_t descriptor_index = 9;
while (count_end_points-- && ((rxep == 0) || txep == 0)) {
if (descriptors[descriptor_index] != 7) return false; // length 7
if (descriptors[descriptor_index+1] != 5) return false; // ep desc
if ((descriptors[descriptor_index+3] == 2)
&& (descriptors[descriptor_index+4] <= 64)
&& (descriptors[descriptor_index+5] == 0)) {
// have a bulk EP size
if (descriptors[descriptor_index+2] & 0x80 ) {
rxep = descriptors[descriptor_index+2];
rxsize = descriptors[descriptor_index+4];
} else {
txep = descriptors[descriptor_index+2];
txsize = descriptors[descriptor_index+4];
}
}
descriptor_index += 7; // setup to look at next one...
}
// Try to verify the end points.
if (!check_rxtx_ep(rxep, txep)) return false;
print("ch341, rxep=", rxep & 15);
println(", txep=", txep);
if (!init_buffers(rxsize, txsize)) return false;
rxpipe = new_Pipe(dev, 2, rxep & 15, 1, rxsize);
if (!rxpipe) return false;
txpipe = new_Pipe(dev, 2, txep, 0, txsize);
if (!txpipe) {
// TODO: free rxpipe
return false;
}

rxpipe->callback_function = rx_callback;
queue_Data_Transfer(rxpipe, rx1, rxsize, this);
rxstate = 1;
txstate = 0;
txpipe->callback_function = tx_callback;
baudrate = 115200;

// Lets see if it will handle the same CDCACM - messages?
println("CH341: 0xC0, 0x5f, 0, 0, 8");
// Need to setup the data the line coding data
mk_setup(setup, 0xC0, 0x5f, 0, 0, sizeof(setupdata));
queue_Control_Transfer(dev, &setup, setupdata, this);
control_queued = true;
setup_state = 1; // We are at step one of setup...
pending_control = 0x3f;
return true;
}
//------------------------------------------------------------------------
// PID:VID - not in our product list.
default:
return false;
} }
} else if (type != 1) return false; } else if (type != 1) return false;
// TTYACM: <Composit device> // TTYACM: <Composit device>
control_queued = true; control_queued = true;
} }
} }

if (sertype == CH341) {
print(" Transfer: ");
print_hexbytes(&transfer->setup, sizeof(setup_t));
if (transfer->length) {
print(" data: ");
print_hexbytes(transfer->buffer, transfer->length);
}
if (pending_control & 1) {
// Still in larger setup state mode
switch (setup_state) {
case 1:
print(" Returned: ");
print_hexbytes(transfer->buffer, transfer->length);
println("CH341: 40, a1, 0, 0, 0");
mk_setup(setup, 0x40, 0xa1, 0, 0, 0); //
queue_Control_Transfer(device, &setup, NULL, this);
setup_state = 2;
control_queued = true;
return;
case 2:
ch341_setBaud(0); // send the first byte of the baud rate
control_queued = true;
setup_state = 3;
return;
case 3:
ch341_setBaud(1); // send the second byte of the baud rate
control_queued = true;
setup_state = 4;
return;
case 4:
println("CH341: c0, 95, 2518, 0, 8");
mk_setup(setup, 0xc0, 0x95, 0x2518, 0, sizeof(setup)); //
queue_Control_Transfer(device, &setup, setupdata, this);
setup_state = 5;
control_queued = true;
return;
case 5:
print(" Returned: ");
print_hexbytes(transfer->buffer, transfer->length);
println("CH341: 40, 0x9a, 0x2518, 0x0050, 0");
mk_setup(setup, 0x40, 0x9a, 0x2518, 0x0050, 0); //
queue_Control_Transfer(device, &setup, NULL, this);
setup_state = 6;
control_queued = true;
return;
case 6:
println("CH341: c0, 95, 0x706, 0, 8 - get status");
mk_setup(setup, 0xc0, 0x95, 0x706, 0, sizeof(setup)); //
queue_Control_Transfer(device, &setup, setupdata, this);
setup_state = 7;
control_queued = true;
return;
case 7:
print(" Returned: ");
print_hexbytes(transfer->buffer, transfer->length);
println("CH341: 40, 0xa1, 0x501f, 0xd90a, 0");
mk_setup(setup, 0x40, 0xa1, 0x501f, 0xd90a, 0); //
queue_Control_Transfer(device, &setup, NULL, this);
setup_state = 8;
control_queued = true;
break;
}
pending_control &= ~1; // We are finally going to leave this list and join the rest
if (control_queued) return;
}
// set baud rate
if (pending_control & 2) {
pending_control &= ~2;
ch341_setBaud(0); // send the first byte of the baud rate
control_queued = true;
return;
}
if (pending_control & 4) {
pending_control &= ~4;
ch341_setBaud(1); // send the first byte of the baud rate
control_queued = true;
return;
}
if (pending_control & 8) {
pending_control &= ~8;
// This is setting handshake need to figure out what...
println("CH341: 0x40, 0xa4, 0xff9f, 0, 0 - Handshake");
mk_setup(setup, 0x40, 0xa4, 0xff9f, 0, 0); //
queue_Control_Transfer(device, &setup, NULL, this);
control_queued = true;
return;
}
if (pending_control & 0x10) {
pending_control &= ~0x10;
// This is setting handshake need to figure out what...
println("CH341: c0, 95, 0x706, 0, 8 - get status");
mk_setup(setup, 0xc0, 0x95, 0x706, 0, sizeof(setup)); //
queue_Control_Transfer(device, &setup, setupdata, this);
control_queued = true;
return;
}
if (pending_control & 0x30) {
pending_control &= ~0x30;
print(" Returned: ");
print_hexbytes(transfer->buffer, transfer->length);
return;
}
}
}

#define CH341_BAUDBASE_FACTOR 1532620800
#define CH341_BAUDBASE_DIVMAX 3
void USBSerial::ch341_setBaud(uint8_t byte_index) {
uint16_t a, b;
uint32_t factor;
uint16_t divisor;

factor = (CH341_BAUDBASE_FACTOR / baudrate);
divisor = CH341_BAUDBASE_DIVMAX;

while ((factor > 0xfff0) && divisor) {
factor >>= 3;
divisor--;
}

factor = 0x10000 - factor;
a = (factor & 0xff00) | divisor;
b = factor & 0xff;

if (byte_index == 0) {
println("CH341: 40, 0x9a, 0x1312... (Baud byte 0):", a, HEX);
mk_setup(setup, 0x40, 0x9a, 0x1312, a, 0); //
} else {
println("CH341: 40, 0x9a, 0x0f2c... (Baud byte 1):", b, HEX);
mk_setup(setup, 0x40, 0x9a, 0x0f2c, b, 0); //
}
queue_Control_Transfer(device, &setup, setupdata, this);
control_queued = true;
} }





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