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Zoologist 发表于 2021-11-20 20:14

支持 CP210X的USB Host 库

来自 USB_Host_Shield_Library_2.0-CP210x



我在 ESP32 上测试过其中的 Loopback 工作正常

#include <CP210x.h>
#include <usbhub.h>

#include "pgmstrings.h"
#include <SPI.h>

class CP210xAsync : public CP210xAsyncOper
{
public:
    uint8_t OnInit(CP210x *pftdi);
};

uint8_t CP210xAsync::OnInit(CP210x *cp210x)
{
uint8_t rcode = 0;
rcode = cp210x->IFCEnable();

if (rcode)
{
    return rcode;
}

rcode = cp210x->SetBaudRate(115200);

if (rcode)
{
    return rcode;
}

rcode = cp210x->SetDataBits(8);
if (rcode)
{
    return rcode;
}

rcode = cp210x->SetStopBits(CP210X_STOP_BITS_1);
if (rcode)
{
    return rcode;
}

rcode = cp210x->SetParity(CP210X_PARITY_NONE);
if (rcode)
{
    return rcode;
}

rcode = cp210x->SetFlowControl(CP210X_FLOW_CONTROL_OFF);
if (rcode)
{
    return rcode;
}


return rcode;
}

USB Usb;
//USBHub Hub(&Usb);
CP210xAsync cp210xAsync;
CP210x cp210x(&Usb, &cp210xAsync);

void setup()
{
Serial.begin( 115200 );
#if !defined(MIPSEL)
while (!Serial); // Wait for serial port to connect - used on Leonardo, Teensy and other boards with built-in USB CDC serial connection
#endif
Serial.println("Start");

if (Usb.Init() == -1)
    Serial.println("OSC did not start.");

delay( 200 );
}

void loop()
{
Usb.Task();

if ( Usb.getUsbTaskState() == USB_STATE_RUNNING )
{
    uint8_trcode;
    char strbuf[] = "DEADBEEF";
    //char strbuf[] = "The quick brown fox jumps over the lazy dog";
    //char strbuf[] = "This string contains 61 character to demonstrate FTDI buffers"; //add one symbol to it to see some garbage
    //Serial.print(".");

    rcode = cp210x.SndData(strlen(strbuf), (uint8_t*)strbuf);

    if (rcode)
      ErrorMessage<uint8_t>(PSTR("SndData"), rcode);

    delay(50);

    uint8_tbuf;

    for (uint8_t i = 0; i < 64; i++)
      buf = 0;

    uint16_t rcvd = 64;
    rcode = cp210x.RcvData(&rcvd, buf);

    if (rcode && rcode != hrNAK)
      ErrorMessage<uint8_t>(PSTR("Ret"), rcode);

    // The device reserves the first two bytes of data
    //   to contain the current values of the modem and line status registers.
    if (rcvd > 2)
      Serial.print((char*)(buf));

    delay(10);
}
}

Zoologist 发表于 2021-11-20 20:23

使用的是为 FireBeetle设计的 USB Host 板，具体在下面可以看到

https://mc.dfrobot.com.cn/thread-309553-1-1.html

查看完整版本: 支持 CP210X的USB Host 库