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/*
* Edited by Robert Woodruff 2021
* From the USBFTDILoopback.ino example provided with the USB Host Shield 2.0 library
* https://github.com/felis/USB_Host_Shield_2.0
* Released under GNU General Public License
*
* This example will check the UART receive buffer once every program loop
* If data is available, one byte will be read in and sent to the MAX3421E
*
* The MAX3421E USB receive buffer will be checked once every program loop
* If data is available, 0 - 62 bytes will be retrieved and sent over UART
*/
#include <cdcftdi.h>
#include <usbhub.h>
#include "pgmstrings.h"
// Satisfy the IDE, which needs to see the include statment in the ino too.
#ifdef dobogusinclude
#include <spi4teensy3.h>
#endif
#include <SPI.h>
class FTDIAsync : public FTDIAsyncOper
{
public:
uint8_t OnInit(FTDI *pftdi);
};
uint8_t FTDIAsync::OnInit(FTDI *pftdi)
{
uint8_t rcode = 0;
rcode = pftdi->SetBaudRate(115200);
if (rcode)
{
ErrorMessage<uint8_t>(PSTR("SetBaudRate"), rcode);
return rcode;
}
rcode = pftdi->SetFlowControl(FTDI_SIO_DISABLE_FLOW_CTRL);
if (rcode)
ErrorMessage<uint8_t>(PSTR("SetFlowControl"), rcode);
return rcode;
}
USB Usb;
//USBHub Hub(&Usb);
FTDIAsync FtdiAsync;
FTDI Ftdi(&Usb, &FtdiAsync);
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_t rcode;
char strbuf[2] = "";
if (Serial.available())
{
// Read character from UART buffer
strbuf[0] = Serial.read();
// Echo character to terminal
Serial.print(strbuf[0]);
// Add LF after a CR
if (strbuf[0] == '\r') {
Serial.print('\n');
}
rcode = Ftdi.SndData(strlen(strbuf), (uint8_t*)strbuf);
if (rcode)
ErrorMessage<uint8_t>(PSTR("SndData"), rcode);
// delay(50);
}
uint8_t buf[64];
for (uint8_t i=0; i<64; i++)
buf[i] = 0;
uint16_t rcvd = 64;
rcode = Ftdi.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)
{
// Print buffer at once
// Serial.print((char*)(buf+2));
// Print buffer characters individually
for (uint8_t i = 2; i < rcvd; i++)
{
Serial.print((char)buf[i]);
// Check for newline
if (buf[i] == '\n') {
// Add return
Serial.print('\r');
}
}
}
// delay(10);
}
}
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