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This commit has a few different parts. It is still a WIP

Browse Source 
This commit adds support for at least some of the Serial boards with the
CH341 chipset, tested using a board from sparkfun as well as one from
Amazon.com

The code was 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.

Support Begin/End/Begin - Change baud

Added code to support switching baud rates, or more particular be able to call end() and then call begin(...) with same or different baud rate.

Hopefully some support for also releasing DTR when the end is called.

WIP - Start support for the begin(baud, format)

Adding some support to the code to handle some of the different possible format capabilities.

In particualar trying to handle the parity, number of bits and number of stop bits.

hacked up test app, such that if you type in command line like:
"#9600, 7e1"

It will extract the 9600 as the new baud and try to use format 7e1.  I only hard coded a few of these in the test app (8n1, 7e1, 7e2, 8n2)...

Again work in progress.  Took me awhile tofigure out how to do this for ch341 boards as I did not see any documents or code that handled this.  So had to deduce it from differences in USB packets.
This commit is contained in:
Kurt Eckhardt 2017-11-01 16:41:54 -07:00
parent de863f4991
commit e2eba5c00d
3 changed files with 545 additions and 148 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
USBHost_t36.h
View File

@ -56,7 +56,7 @@
// your best effort to read chapter 4 before asking USB questions!
//#define USBHOST_PRINT_DEBUG
#define USBHOST_PRINT_DEBUG
/************************************************/
/* Data Types */
@ -91,6 +91,7 @@ class USBDriverTimer;
/************************************************/
/* Added Defines */
/************************************************/
// Keyboard special Keys
#define KEYD_UP 0xDA
#define KEYD_DOWN 0xD9
#define KEYD_LEFT 0xD8
@ -114,6 +115,22 @@ class USBDriverTimer;
#define KEYD_F11 0xCC
#define KEYD_F12 0xCD
// USBSerial formats - Lets encode format into bits
// Bits: 0-4 - Number of data bits
// Bits: 5-7 - Parity (0=none, 1=odd, 2 = even)
// bits: 8-9 - Stop bits. 0=1, 1=2
#define USBHOST_SERIAL_7E1 0x027
#define USBHOST_SERIAL_7O1 0x047
#define USBHOST_SERIAL_8N1 0x08
#define USBHOST_SERIAL_8N2 0x108
#define USBHOST_SERIAL_8E1 0x028
#define USBHOST_SERIAL_8O1 0x048
/************************************************/
/* Data Structure Definitions */
/************************************************/
@ -889,11 +906,13 @@ private:
//--------------------------------------------------------------------------
class USBSerial: public USBDriver, public Stream {
public:
public:
// 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
USBSerial(USBHost &host) : txtimer(this) { init(); }
void begin(uint32_t baud, uint32_t format=0);
void begin(uint32_t baud, uint32_t format=USBHOST_SERIAL_8N1);
void end(void);
virtual int available(void);
virtual int peek(void);
@ -916,6 +935,7 @@ private:
void init();
static bool check_rxtx_ep(uint32_t &rxep, uint32_t &txep);
bool init_buffers(uint32_t rsize, uint32_t tsize);
void ch341_setBaud(uint8_t byte_index);
private:
Pipe_t mypipes[3] __attribute__ ((aligned(32)));
Transfer_t mytransfers[7] __attribute__ ((aligned(32)));
@ -925,6 +945,7 @@ private:
setup_t setup;
uint8_t setupdata[8];
uint32_t baudrate;
uint32_t format_;
Pipe_t *rxpipe;
Pipe_t *txpipe;
uint8_t *rx1; // location for first incoming packet
@ -947,7 +968,16 @@ private:
uint8_t pl2303_v2;
uint8_t interface;
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[];
};
//--------------------------------------------------------------------------

83
examples/SerialTest/SerialTest.ino
View File

@ -4,6 +4,8 @@
#include "USBHost_t36.h"
#define USBBAUD 115200
uint32_t baud = USBBAUD;
uint32_t format = USBHOST_SERIAL_8N1;
USBHost myusb;
USBHub hub1(myusb);
USBHub hub2(myusb);
@ -60,23 +62,8 @@ void loop()
// If this is a new Serial device.
if (drivers[i] == &userial) {
// Lets try first outputting something to our USerial to see if it will go out...
userial.begin(USBBAUD);
userial.begin(baud);
// delay(5);
// userial.println("ver");
#if 0
userial.println("abcdefghijklmnopqrstuvwxyz");
userial.println("ABCDEFGHIJKLMNOPQURSTUVWYZ");
userial.flush(); // force it out now.
userial.println("0123456789");
userial.flush();
delay(2);
userial.println("abcdefghijklmnopqrstuvwxyz");
userial.println("ABCDEFGHIJKLMNOPQURSTUVWYZ");
delay(2);
userial.println("!@#$%^&*()");
userial.flush();
#endif
}
}
}
@ -89,8 +76,55 @@ void loop()
if (ch == '$') {
BioloidTest();
while (Serial.read() != -1);
} else if (ch == '#') {
// Lets see if we have a baud rate specified here...
uint32_t new_baud = 0;
for(;;) {
ch = Serial.read();
if ((ch < '0') || (ch > '9'))
break;
new_baud = new_baud*10 + ch - '0';
}
// See if the user is specifying a format: 8n1, 7e1, 7e2, 8n2
// Note this is Quick and very dirty code...
//
if (ch == ',') {
char command_line[10];
ch = Serial.read();
while (ch == ' ') Serial.read(); // ignore any spaces.
uint8_t cb = 0;
while ((ch > ' ') && (cb < sizeof(command_line))) {
command_line[cb++] = ch;
ch = Serial.read();
}
command_line[cb] = '\0';
if (CompareStrings(command_line, "8N1")) format = USBHOST_SERIAL_8N1;
else if (CompareStrings(command_line, "8N2")) format = USBHOST_SERIAL_8N2;
else if (CompareStrings(command_line, "7E1")) format = USBHOST_SERIAL_7E1;
else if (CompareStrings(command_line, "7O1")) format = USBHOST_SERIAL_7O1;
}
Serial.println("\n*** Set new Baud command ***\n do userial.end()");
digitalWriteFast(2, HIGH);
userial.end(); // Do the end statement;
digitalWriteFast(2, LOW);
if (new_baud) {
baud = new_baud;
Serial.print(" New Baud: ");
Serial.println(baud);
Serial.print(" Format: ");
Serial.println(format);
digitalWriteFast(3, HIGH);
userial.begin(baud, format);
digitalWriteFast(3, LOW);
Serial.println(" Completed ");
} else {
Serial.println(" New Baud 0 - leave disabled");
}
while (Serial.read() != -1);
} else {
userial.write(ch);
}
else userial.write(ch);
}
}
@ -106,14 +140,25 @@ void loop()
}
}
bool CompareStrings(const char *sz1, const char *sz2) {
while (*sz2 != 0) {
if (toupper(*sz1) != toupper(*sz2))
return false;
sz1++;
sz2++;
}
return true; // end of string so show as match
}
//#define ID_MASTER 200
#define ID_MASTER 0xfd
// Extract stuff from Bioloid library..
#define AX12_BUFFER_SIZE 128
#define COUNTER_TIMEOUT 12000
/** Instruction Set **/
#define AX_PING 1
/** Instruction Set **/ #define AX_PING 1
#define AX_READ_DATA 2
#define AX_WRITE_DATA 3
#define AX_REG_WRITE 4

464
serial.cpp
View File

@ -19,6 +19,8 @@
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Note: special thanks to the Linux kernel for the CH341's method of operation, particularly how the baud rate is encoded.
*/
#include <Arduino.h>
@ -28,14 +30,21 @@
#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
@ -47,6 +56,7 @@ void USBSerial::init()
contribute_Transfers(mytransfers, sizeof(mytransfers)/sizeof(Transfer_t));
contribute_String_Buffers(mystring_bufs, sizeof(mystring_bufs)/sizeof(strbuf_t));
driver_ready_for_device(this);
format_ = USBHOST_SERIAL_8N1;
}
bool USBSerial::claim(Device_t *dev, int type, const uint8_t *descriptors, uint32_t len)
@ -60,51 +70,9 @@ bool USBSerial::claim(Device_t *dev, int type, const uint8_t *descriptors, uint3
println(", bDeviceProtocol = ", dev->bDeviceProtocol);
print_hexbytes(descriptors, len);
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...
// Try some ttyACM types?
// This code may be similar to MIDI code.
@ -226,8 +194,66 @@ bool USBSerial::claim(Device_t *dev, int type, const uint8_t *descriptors, uint3
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
if (dev->idVendor == 0x67B && dev->idProduct == 0x2303) {
case PL2303:
{
// Prolific Technology, Inc. PL2303 Serial Port
println("len = ", len);
uint8_t count_end_points = descriptors[4];
@ -252,15 +278,17 @@ bool USBSerial::claim(Device_t *dev, int type, const uint8_t *descriptors, uint3
// 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("FTDI, rxep=", rxep & 15);
print("PL2303, rxep=", rxep & 15);
println(", txep=", txep);
if (!init_buffers(64, 64)) return false;
rxpipe = new_Pipe(dev, 2, rxep & 15, 1, 64);
@ -275,24 +303,88 @@ bool USBSerial::claim(Device_t *dev, int type, const uint8_t *descriptors, uint3
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;
// 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...
pending_control = 0x3f;
return true;
}
//------------------------------------------------------------------------
// 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 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;
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 = 0x7f;
return true;
}
//------------------------------------------------------------------------
// PID:VID - not in our product list.
default:
return false;
}
} else if (type != 1) return false;
// TTYACM: <Composit device>
//
@ -424,7 +516,15 @@ void USBSerial::control(const Transfer_t *transfer)
if (pending_control & 1) {
pending_control &= ~1;
// set data format
mk_setup(setup, 0x40, 4, 8, 0, 0); // data format 8N1
uint16_t ftdi_format = format_ & 0xf; // This should give us the number of bits.
// now lets extract the parity from our encoding
ftdi_format |= (format_ & 0xe0) << 3; // they encode bits 9-11
// See if two stop bits
if (format_ & 0x100) ftdi_format |= (0x2 << 11);
mk_setup(setup, 0x40, 4, ftdi_format, 0, 0); // data format 8N1
queue_Control_Transfer(device, &setup, NULL, this);
control_queued = true;
return;
@ -454,6 +554,15 @@ void USBSerial::control(const Transfer_t *transfer)
control_queued = true;
return;
}
// clear DTR
if (pending_control & 0x80) {
pending_control &= ~0x80;
println("FTDI clear DTR");
mk_setup(setup, 0x40, 1, 0x0100, 0, 0);
queue_Control_Transfer(device, &setup, NULL, this);
control_queued = true;
return;
}
}
@ -467,9 +576,9 @@ void USBSerial::control(const Transfer_t *transfer)
setupdata[1] = (baudrate >> 8) & 0xff;
setupdata[2] = (baudrate >> 16) & 0xff;
setupdata[3] = (baudrate >> 24) & 0xff;
setupdata[4] = 0; // 0 - 1 stop bit, 1 - 1.5 stop bits, 2 - 2 stop bits
setupdata[5] = 0; // 0 - None, 1 - Odd, 2 - Even, 3 - Mark, 4 - Space
setupdata[6] = 8; // Data bits (5, 6, 7, 8 or 16)
setupdata[4] = (format_ & 0x100)? 2 : 0; // 0 - 1 stop bit, 1 - 1.5 stop bits, 2 - 2 stop bits
setupdata[5] = (format_ & 0xe0) >> 5; // 0 - None, 1 - Odd, 2 - Even, 3 - Mark, 4 - Space
setupdata[6] = format_ & 0x1f; // Data bits (5, 6, 7, 8 or 16)
print("CDCACM setup: ");
print_hexbytes(&setupdata, 7);
mk_setup(setup, 0x21, 0x20, 0, 0, 7);
@ -487,6 +596,15 @@ void USBSerial::control(const Transfer_t *transfer)
control_queued = true;
return;
}
if (pending_control & 0x80) {
pending_control &= ~0x80;
println("Control - 0x21,0x22, 0x0 - clear DTR");
// Need to setup the data the line coding data
mk_setup(setup, 0x21, 0x22, 0, 0, 0);
queue_Control_Transfer(device, &setup, NULL, this);
control_queued = true;
return;
}
}
//-------------------------------------------------------------------------
@ -607,9 +725,9 @@ void USBSerial::control(const Transfer_t *transfer)
setupdata[1] = (baudrate >> 8) & 0xff;
setupdata[2] = (baudrate >> 16) & 0xff;
setupdata[3] = (baudrate >> 24) & 0xff;
setupdata[4] = 0; // 0 - 1 stop bit, 1 - 1.5 stop bits, 2 - 2 stop bits
setupdata[5] = 0; // 0 - None, 1 - Odd, 2 - Even, 3 - Mark, 4 - Space
setupdata[6] = 8; // Data bits (5, 6, 7, 8 or 16)
setupdata[4] = (format_ & 0x100)? 2 : 0; // 0 - 1 stop bit, 1 - 1.5 stop bits, 2 - 2 stop bits
setupdata[5] = (format_ & 0xe0) >> 5; // 0 - None, 1 - Odd, 2 - Even, 3 - Mark, 4 - Space
setupdata[6] = format_ & 0x1f; // Data bits (5, 6, 7, 8 or 16)
print("PL2303: Set baud/control: ", baudrate, HEX);
print(" = ");
print_hexbytes(&setupdata, 7);
@ -639,20 +757,198 @@ void USBSerial::control(const Transfer_t *transfer)
print("PL2303: Returned configuration data: ");
print_hexbytes(setupdata, 7);
// This sets the control lines (0x1=DTR, 0x2=RTS)
println("PL2303: 0x21, 0x22, 0x3");
mk_setup(setup, 0x21, 0x22, 3, 0, 0); //
queue_Control_Transfer(device, &setup, NULL, this);
control_queued = true;
return;
}
if (pending_control & 0x30) {
pending_control &= ~0x30;
if (pending_control & 0x20) {
pending_control &= ~0x20;
println("PL2303: 0x21, 0x22, 0x3");
mk_setup(setup, 0x21, 0x22, 3, 0, 0); //
queue_Control_Transfer(device, &setup, NULL, this);
control_queued = true;
}
if (pending_control & 0x80) {
pending_control &= ~0x80;
println("PL2303: 0x21, 0x22, 0x0"); // Clear DTR/RTS
mk_setup(setup, 0x21, 0x22, 0, 0, 0); //
queue_Control_Transfer(device, &setup, NULL, this);
control_queued = true;
}
}
if (sertype == CH341) {
#if 0
print(" Transfer: ");
print_hexbytes(&transfer->setup, sizeof(setup_t));
if (transfer->length) {
print(" data: ");
print_hexbytes(transfer->buffer, transfer->length);
}
#endif
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;
uint16_t ch341_format;
switch (format_) {
default:
// These values were observed when used on PC... Need to flush out others.
case USBHOST_SERIAL_8N1: ch341_format = 0xc3; break;
case USBHOST_SERIAL_7E1: ch341_format = 0xda; break;
case USBHOST_SERIAL_7O1: ch341_format = 0xca; break;
case USBHOST_SERIAL_8N2: ch341_format = 0xc7; break;
}
println("CH341: 40, 0x9a, 0x2518: ", ch341_format, HEX);
mk_setup(setup, 0x40, 0x9a, 0x2518, ch341_format, 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...
// 0x20=DTR, 0x40=RTS send ~ of values.
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 & 0x20) {
pending_control &= ~0x20;
// 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 & 0x40) {
pending_control &= ~0x40;
print(" Returned: ");
print_hexbytes(transfer->buffer, transfer->length);
println("CH341: 0x40, 0x9a, 0x2727, 0, 0");
mk_setup(setup, 0x40, 0x9a, 0x2727, 0, 0); //
queue_Control_Transfer(device, &setup, NULL, this);
return;
}
if (pending_control & 0x80) {
pending_control &= ~0x80;
println("CH341: 0x40, 0xa4, 0xffff, 0, 0 - Handshake");
mk_setup(setup, 0x40, 0xa4, 0xffff, 0, 0); //
queue_Control_Transfer(device, &setup, NULL, this);
control_queued = true;
return;
}
}
}
#define CH341_BAUDBASE_FACTOR 1532620800
#define CH341_BAUDBASE_DIVMAX 3
void USBSerial::ch341_setBaud(uint8_t byte_index) {
if (byte_index == 0) {
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;
factor = (factor & 0xff00) | divisor;
setupdata[0] = factor & 0xff; // save away the low byte for 2nd message
println("CH341: 40, 0x9a, 0x1312... (Baud word 0):", factor, HEX);
mk_setup(setup, 0x40, 0x9a, 0x1312, factor, 0); //
} else {
// Second packet use the byte we saved away during the calculation above
println("CH341: 40, 0x9a, 0x0f2c... (Baud word 1):", setupdata[0], HEX);
mk_setup(setup, 0x40, 0x9a, 0x0f2c, setupdata[0], 0); //
}
queue_Control_Transfer(device, &setup, setupdata, this);
control_queued = true;
}
@ -866,14 +1162,40 @@ void USBSerial::begin(uint32_t baud, uint32_t format)
{
NVIC_DISABLE_IRQ(IRQ_USBHS);
baudrate = baud;
pending_control |= 2;
bool format_changed = format != format_;
format_ = format;
switch (sertype) {
default:
case CDCACM: pending_control |= 0x6; break;
case FTDI: pending_control |= (format_changed? 0xf : 0xe); break; // Set BAUD, FLOW, DTR
case PL2303: pending_control |= 0x1e; break; // set more stuff...
case CH341: pending_control |= 0x1e; break;
}
if (!control_queued) control(NULL);
NVIC_ENABLE_IRQ(IRQ_USBHS);
// Wait until all packets have been queued before we return to caller.
while (pending_control) {
yield(); // not sure if we want to yield or what?
}
}
void USBSerial::end(void)
{
// TODO: lower DTR
NVIC_DISABLE_IRQ(IRQ_USBHS);
switch (sertype) {
default:
case CDCACM: pending_control |= 0x80; break;
case FTDI: pending_control |= 0x80; break; // clear DTR
case PL2303: pending_control |= 0x80; break;
case CH341: pending_control |= 0x80; break;
}
if (!control_queued) control(NULL);
NVIC_ENABLE_IRQ(IRQ_USBHS);
// Wait until all packets have been queued before we return to caller.
while (pending_control) {
yield(); // not sure if we want to yield or what?
}
}
int USBSerial::available(void)