convert fprint() to writing text in text area

**Darktyr** · 17th August 2012, 03:37

premise:

I am using an FTDI C232H cable to communicate via I2C protocol to a MAX31785 fan controller. I have a basic script setup
that can communicate with the fan controller and do other meaningful stuff. I want to convert that into a GUI that just has a
column of buttons on the left side that perform various functions, program, read temp, read fan rpm, and then write the
output and stuff to a text area.

Problem/Question:

I am not sure how to go about this using Qt. I am sure there are at least a dozen ways to perform this task but I am not sure
which one would work the best and make the most sense. Basically I want to transform all the fprints() to a write to the text area.

here is the script that I currently have:

Qt Code:

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#include <stdio.h>
#include <tchar.h>
#include <Windows.h>
#include "Headers/ftd2xx.h"
#include "Headers/libMPSSE_i2c.h"
 
using namespace std;
 
 
 
/******************************************************************************/
/*								Function Definitions      					  */
/******************************************************************************/
/* Helper macros */
 
 
void Check_Status(unsigned long exp)
{
    if(exp!=FT_OK)
    {
        printf("\n\n\n%s: %d : %s(): \n status(0x%x)=\n",__FILE__, __LINE__, __FUNCTION__,exp);
        getchar();
        exit(1);
    }
    else
    {
        ;
    }
}
 
FT_STATUS status;
FT_HANDLE Handle;
 
 
//int _tmain(int argc, _TCHAR* argv[])
int main()
{
    //FTDI Driver stuff
    FT_DEVICE_LIST_INFO_NODE devList;
    uint32 channels;
    int channelOpen = 0;
 
    // EEPROM reading variables and structures
    char Manufacturer[64];
    char ManufacturerID[64];
    char Description[64];
    char SerialNumber[64];
 
    FT_EEPROM_HEADER ft_eeprom_header;
    ft_eeprom_header.deviceType = FT_DEVICE_232H;
 
    FT_EEPROM_232H ft_eeprom_232h;
    ft_eeprom_232h.common = ft_eeprom_header;
    ft_eeprom_232h.common.deviceType = FT_DEVICE_232H;
 
    // libMPSSE-related variables
    ChannelConfig channelConf;
    Init_libMPSSE();
    //General variables
    uint32 TrialAddress = 0x00;
    int i;
    int	j;
    uint8 i2cAddress = 0x00;
    unsigned char i2cDataSend[1024] = {0};		// Initialize a data buffer and set to all Zeros
    unsigned char i2cDataReceive[1024] = {0};		// Initialize a data buffer and set to all Zeros
    uint32 i2cNumBytesToTx = 0;			// Initialize a counter for the buffer and set to Zero
    uint32 i2cNumBytesTxd = 0;			// Initialize another counter for the number of bytes actually sent and set to Zero
    uint32 i2cNumBytesToRx = 0;			// Initialize a counter for the recieve buffer and set to Zero
    uint32 i2cNumBytesRxd = 0;			// Initialize another counter for the number of bytes actually recieved and set to Zero
 
 
    channelConf.ClockRate = I2C_CLOCK_STANDARD_MODE;// 100,000 Hz
    channelConf.LatencyTimer= 255;
    channelConf.Options = I2C_DISABLE_3PHASE_CLOCKING;
    printf("Press Enter to Start");
    getchar();
 
    status = I2C_GetNumChannels(&channels);
    Check_Status(status);
    printf("Number of available I2C channels = %d\n",channels);
    //Get information on each available channel.
    if(channels>0)
    {
        for(i=0;i<channels;i++)
        {
            status = I2C_GetChannelInfo(i, &devList);
            Check_Status(status);
            printf("Information on channel number %d:\n",i);
            //print the dev info
            printf("		Flags=0x%x\n", devList.Flags);
            printf("		Type=0x%x\n", devList.Type);
            printf("		ID=0x0%x\n", devList.ID);
            printf("		LocId=0x%x\n", devList.LocId);
            printf("		SerialNumber=%s\n", devList.SerialNumber);
            printf("		Description=%s\n", devList.Description);
        }
    }
    else
    {
        printf("No FTDI devices were found\n");
        getchar();
        return 0;
    }
 
 
    //
    //I2C_OpenChannel
    status = FT_Open(channelOpen,&Handle);
    if (status == FT_OK)
    {
        printf("Channel %d has been successfully opened\n", channelOpen);
    }
    else
    {
        printf("Channel %d is unable to be opened\n", channelOpen);
        printf("status = 0x%x\n");
        getchar();
        return 0;
    }
    printf("Reading the EEPROM...\n");
    status = FT_EEPROM_Read(Handle, &ft_eeprom_232h, sizeof(ft_eeprom_232h), Manufacturer, ManufacturerID, Description, SerialNumber);
    if (status == FT_OK)
    {
        printf("		VendorID = 0x%04x\n", ft_eeprom_232h.common.VendorId);
        printf("		ProductID = 0x%04x\n", ft_eeprom_232h.common.ProductId);
        printf("		Manufacturer = %s\n",Manufacturer);
        printf("		Manufacturer ID = %s\n",ManufacturerID);
        printf("		Description = %s \n", Description);
        printf("		SerialNumber = %s \n", SerialNumber);
    }
    else
    {
        printf("Unable to read EEPROM\n");
    }
 
    printf("Initializing for I2C operation...\n");
    status = I2C_InitChannel(Handle,&channelConf);
    if (status == FT_OK)
    {
        printf("Channel %d has been successfully initialized.\n", channelOpen);
    }
    else
    {
        printf("Channel %d is unable to be initialized\n", channelOpen);
        printf("status = 0x%x\n", status);
        getchar();
        I2C_CloseChannel(Handle);
        return 0;
    }
    getchar();
    printf("Searching for I2C devices... ");
    j = 0;
 
    //this section finds all MAX chips by sending out the write_protect command
    //on every availavle 7 bit I2C address, not including address 0x00 because that is
    //a broadcast address
 
    i2cNumBytesToTx = 0;
    i2cDataSend[i2cNumBytesToTx++] = 0x10;		//Write_Protect Command
    i2cDataSend[i2cNumBytesToTx++] = 0x00;		//Disable write protect
    for (i = 0x00; i < 128; i++)
    {
        TrialAddress = i;
        status = I2C_DeviceWrite(Handle, TrialAddress, i2cNumBytesToTx, i2cDataSend, &i2cNumBytesTxd, 0x07);
        if (status == FT_OK)
        {
 
            j++;
            printf("\n	I2C Address %X Responded\n",i);
        }
        else
        {
            ;
        }
    }
    if (j == 0)
    {
        printf("Could not find any I2C devices\n");
    }
    printf("\n\nThat is all for now, move along,\n nothing more to see here,\n move along to another program \n");
    getchar();
    Cleanup_libMPSSE();
}

#include <stdio.h>
#include <tchar.h>
#include <Windows.h>
#include "Headers/ftd2xx.h"
#include "Headers/libMPSSE_i2c.h"

using namespace std;



/******************************************************************************/
/*								Function Definitions      					  */
/******************************************************************************/
/* Helper macros */


void Check_Status(unsigned long exp)
{
    if(exp!=FT_OK)
    {
        printf("\n\n\n%s: %d : %s(): \n status(0x%x)=\n",__FILE__, __LINE__, __FUNCTION__,exp);
        getchar();
        exit(1);
    }
    else
    {
        ;
    }
}

FT_STATUS status;
FT_HANDLE Handle;


//int _tmain(int argc, _TCHAR* argv[])
int main()
{
    //FTDI Driver stuff
    FT_DEVICE_LIST_INFO_NODE devList;
    uint32 channels;
    int channelOpen = 0;

    // EEPROM reading variables and structures
    char Manufacturer[64];
    char ManufacturerID[64];
    char Description[64];
    char SerialNumber[64];

    FT_EEPROM_HEADER ft_eeprom_header;
    ft_eeprom_header.deviceType = FT_DEVICE_232H;

    FT_EEPROM_232H ft_eeprom_232h;
    ft_eeprom_232h.common = ft_eeprom_header;
    ft_eeprom_232h.common.deviceType = FT_DEVICE_232H;

    // libMPSSE-related variables
    ChannelConfig channelConf;
    Init_libMPSSE();
    //General variables
    uint32 TrialAddress = 0x00;
    int i;
    int	j;
    uint8 i2cAddress = 0x00;
    unsigned char i2cDataSend[1024] = {0};		// Initialize a data buffer and set to all Zeros
    unsigned char i2cDataReceive[1024] = {0};		// Initialize a data buffer and set to all Zeros
    uint32 i2cNumBytesToTx = 0;			// Initialize a counter for the buffer and set to Zero
    uint32 i2cNumBytesTxd = 0;			// Initialize another counter for the number of bytes actually sent and set to Zero
    uint32 i2cNumBytesToRx = 0;			// Initialize a counter for the recieve buffer and set to Zero
    uint32 i2cNumBytesRxd = 0;			// Initialize another counter for the number of bytes actually recieved and set to Zero


    channelConf.ClockRate = I2C_CLOCK_STANDARD_MODE;// 100,000 Hz
    channelConf.LatencyTimer= 255;
    channelConf.Options = I2C_DISABLE_3PHASE_CLOCKING;
    printf("Press Enter to Start");
    getchar();

    status = I2C_GetNumChannels(&channels);
    Check_Status(status);
    printf("Number of available I2C channels = %d\n",channels);
    //Get information on each available channel.
    if(channels>0)
    {
        for(i=0;i<channels;i++)
        {
            status = I2C_GetChannelInfo(i, &devList);
            Check_Status(status);
            printf("Information on channel number %d:\n",i);
            //print the dev info
            printf("		Flags=0x%x\n", devList.Flags);
            printf("		Type=0x%x\n", devList.Type);
            printf("		ID=0x0%x\n", devList.ID);
            printf("		LocId=0x%x\n", devList.LocId);
            printf("		SerialNumber=%s\n", devList.SerialNumber);
            printf("		Description=%s\n", devList.Description);
        }
    }
    else
    {
        printf("No FTDI devices were found\n");
        getchar();
        return 0;
    }

 
    //
    //I2C_OpenChannel
    status = FT_Open(channelOpen,&Handle);
    if (status == FT_OK)
    {
        printf("Channel %d has been successfully opened\n", channelOpen);
    }
    else
    {
        printf("Channel %d is unable to be opened\n", channelOpen);
        printf("status = 0x%x\n");
        getchar();
        return 0;
    }
    printf("Reading the EEPROM...\n");
    status = FT_EEPROM_Read(Handle, &ft_eeprom_232h, sizeof(ft_eeprom_232h), Manufacturer, ManufacturerID, Description, SerialNumber);
    if (status == FT_OK)
    {
        printf("		VendorID = 0x%04x\n", ft_eeprom_232h.common.VendorId);
        printf("		ProductID = 0x%04x\n", ft_eeprom_232h.common.ProductId);
        printf("		Manufacturer = %s\n",Manufacturer);
        printf("		Manufacturer ID = %s\n",ManufacturerID);
        printf("		Description = %s \n", Description);
        printf("		SerialNumber = %s \n", SerialNumber);
    }
    else
    {
        printf("Unable to read EEPROM\n");
    }

    printf("Initializing for I2C operation...\n");
    status = I2C_InitChannel(Handle,&channelConf);
    if (status == FT_OK)
    {
        printf("Channel %d has been successfully initialized.\n", channelOpen);
    }
    else
    {
        printf("Channel %d is unable to be initialized\n", channelOpen);
        printf("status = 0x%x\n", status);
        getchar();
        I2C_CloseChannel(Handle);
        return 0;
    }
    getchar();
    printf("Searching for I2C devices... ");
    j = 0;

    //this section finds all MAX chips by sending out the write_protect command
    //on every availavle 7 bit I2C address, not including address 0x00 because that is
    //a broadcast address

    i2cNumBytesToTx = 0;
    i2cDataSend[i2cNumBytesToTx++] = 0x10;		//Write_Protect Command
    i2cDataSend[i2cNumBytesToTx++] = 0x00;		//Disable write protect
    for (i = 0x00; i < 128; i++)
    {
        TrialAddress = i;
        status = I2C_DeviceWrite(Handle, TrialAddress, i2cNumBytesToTx, i2cDataSend, &i2cNumBytesTxd, 0x07);
        if (status == FT_OK)
        {

            j++;
            printf("\n	I2C Address %X Responded\n",i);
        }
        else
        {
            ;
        }
    }
    if (j == 0)
    {
        printf("Could not find any I2C devices\n");
    }
    printf("\n\nThat is all for now, move along,\n nothing more to see here,\n move along to another program \n");
    getchar();
    Cleanup_libMPSSE();
}

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**ChrisW67** · 17th August 2012, 04:47

There are plenty of tutorials and examples and in the documentation to help build the basic application shell. The Qt equivalent to printf() is QString::arg() and you get and set the text of a QTextEdit or QPlainTextEdit with their text() and setText() functions respectively.

**Darktyr** · 17th August 2012, 14:48

There are plenty of tutorials and examples and in the documentation to help build the basic application shell.

If I had found something, I probably would not of posted this.
In all of the examples I have seen, I have never seen QString::arg().

This is more of what I was talking about, or I should say it has the effect that I am looking for.

Qt Code:

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QString line = "Writing Text";
QString line2 = "Writing more";
ui->textEdit->append(line);
ui->textEdit->append(line2);
ui->textEdit->show();

QString line = "Writing Text";
QString line2 = "Writing more";
ui->textEdit->append(line);
ui->textEdit->append(line2);
ui->textEdit->show();

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Is there an example using the QString::arg()?

**yeye_olive** · 17th August 2012, 15:43

I just had a very quick look and I saw that the Class Wizard example uses this. Anyway it is as simple as this:

Qt Code:

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myTextEdit->setText(QString::fromAscii("Hello, %1! Did you know that %2 + %3 = %4?").arg(QString::fromAscii("world"), 2, 2, 4));

myTextEdit->setText(QString::fromAscii("Hello, %1! Did you know that %2 + %3 = %4?").arg(QString::fromAscii("world"), 2, 2, 4));

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**ChrisW67** · 17th August 2012, 22:12

Originally Posted by Darktyr

Is there an example using the QString::arg()?

The text of docs I gave you a link to gives you an example. Here: QString::arg()

**Darktyr** · 20th August 2012, 20:58

Thank You ChrisW67 and yeye_olive.

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