Something is moving on the SDA line, I am trying to output values to the 8574A (address 0x38 .... therefore 0x70), this can be seen in the oscilloscope, but the outputs of the IC do not move. I just attach the snippet of code I'm using .... written down quickly, so please don't complain 😉 Address for the 8574 is 0x38, so after Shift 1 then 0x70. do I see that correctly that the value is then passed "decimal"?
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The snipped is based on the "simpleCVI" example from the LJ-site
I have a warning in line 170
AddRequest(lngHandle, LJ_ioI2C_COMMUNICATION, LJ_chI2C_WRITE, numWrite, array, 0);
170, 77 warning: incompatible pointer to integer conversion passing 'long [20]' to parameter of type 'long'
#define ON 1
#define OFF 0
#include <userint.h>
#include <utility.h>
#include <stdio.h>
#include "c:\p//---------------------------------------------------------------------------
//
// simplecvi.c
//
//----------------------------------------------------------------------
//
rogram files\LabJack\Drivers\LabJackUD.h"
int adr_8574 = 70;
long lngErrorcode;
long lngIOType = 0;
long lngChannel = 0;
double dblValue = 0;
double Value2 = 0;
double Value3 = 0;
double ValueDIBit = 0;
double ValueDIPort = 0;
double ValueDOBit = 0;
LJ_HANDLE lngHandle = 0;
char err[255];
long array[20];
int ch;
int counter = 0;
int max_number = 500;
int eventData2 = 0;
int numWrite = 0;
int dummy = 0;
void set_port(double port, double status);
void config_labjack(void);
void error_message(long code);
void execute(void);
void job_1(void);
main()
{
config_labjack();
while (counter++ < max_number)
{
job_1();
while (KeyHit())
{
ch=GetKey();
printf("\n\nTaste = %c\n\n ", ch);
if (ch=='e')
{
counter = max_number;
set_port(16,OFF);
set_port(17,OFF);
}
}
}
return 0;
}
//----------------------------------------------------------------------------------------------
//----------------------------------------------------------------------------------------------
void job_1(void)
{
printf("counter = %d\n",counter); // Abwechselndes Ein- und Ausschalten zweier LED, Ausgabe
Delay(0.25); // des Counters, Abfrage auf Taste "e" für vorzeitiges
set_port(16,ON); // Beenden
set_port(17,OFF);
Delay(0.25);
set_port(16,OFF);
set_port(17,ON);
numWrite = 1;
AddRequestPtr(lngHandle, LJ_ioI2C_COMMUNICATION, LJ_chI2C_WRITE, numWrite, array, 0);
array[0]++;
if (array[0]>255)
{
array[0] = 0;
}
printf("\n\narray[0] = %d\n\n ", array[0]);
}
//----------------------------------------------------------------------------------------------
//----------------------------------------------------------------------------------------------
void execute(void)
{
lngErrorcode = GoOne (lngHandle);
if(lngErrorcode) error_message(lngErrorcode);
}
//----------------------------------------------------------------------------------------------
//----------------------------------------------------------------------------------------------
void set_port(double port, double status)
{
lngErrorcode = AddRequest (lngHandle, LJ_ioDIGITAL_BIT_OUT, port, status, 0, 0);
if(lngErrorcode) error_message(lngErrorcode);
execute();
}
//----------------------------------------------------------------------------------------------
//----------------------------------------------------------------------------------------------
void config_labjack(void)
{
lngErrorcode = OpenLabJack (LJ_dtU6, LJ_ctUSB, "1", 1, &lngHandle); // LJ_dtU6 --- welches Gerät
// LJ_ctUSB --- conection via USB
// "1" Adresse als String!!!
// 1 --- ignore adress, use next available one
// lngHandle --- Rückgabe des handles (reference)
if(lngErrorcode) error_message(lngErrorcode); // Fehlermeldung auf Konsole, wenn z. B. LJ nicht da
//--------------------------------------------------------------------------------------------------------------------------------------------
// Gerät konfigurieren
//--------------------------------------------------------------------------------------------------------------------------------------------
// LJ_ioGET_DIGITAL_BIT --- sets direction to input.
// LJ_ioGET_DIGITAL_BIT_DIR
// LJ_ioGET_DIGITAL_BIT_STATE
// LJ_ioGET_DIGITAL_PORT --- sets directions to input.x1 is number of bits.
// LJ_ioGET_DIGITAL_PORT_DIR --- x1 is number of bits.
// LJ_ioGET_DIGITAL_PORT_STATE --- x1 is number of bits.
// LJ_ioPUT_DIGITAL_BIT --- sets direction to output.
// LJ_ioPUT_DIGITAL_PORT --- sets directions to output.x1 is number of bits.
// Bit numbers
// FI00 - FI07 --- 0..7
// EI00 - EI07 --- 8..15
// CI00 - CI03 --- 16..19
// MI00 - MI02 --- 20..22
//
//
// Konfiguration
//==============
// Aus-und Eingänge definieren
lngErrorcode = AddRequest (lngHandle, LJ_ioPUT_DIGITAL_BIT, 16, 1, 0, 0); // CI00 als active high-Ausgang
if(lngErrorcode) error_message(lngErrorcode);
lngErrorcode = AddRequest (lngHandle, LJ_ioPUT_DIGITAL_BIT, 17, 1, 0, 0); // CI01 als active high-Ausgang
if(lngErrorcode) error_message(lngErrorcode);
execute();
//-----------------------------------------------------------------------
// I2C für den 8574 vorbereiten
//Assign the (hardware)adress to a handle
AddRequest(lngHandle, LJ_ioPUT_CONFIG, LJ_chI2C_ADDRESS_BYTE, adr_8574, 0, 0);
array[0] = 0;
numWrite = 1;
//The following code configures I2C to enable the "no stop when restarting" I2C feature
AddRequest(lngHandle, LJ_ioPUT_CONFIG, LJ_chI2C_OPTIONS, 4,0,0);
AddRequest(lngHandle, LJ_ioPUT_CONFIG, LJ_chI2C_SPEED_ADJUST, 0, 0, 0);
AddRequest(lngHandle, LJ_ioI2C_COMMUNICATION, LJ_chI2C_WRITE, numWrite, array, 0);
execute();
//--------------------------------------------------------
}
//----------------------------------------------------------------------------------------------
//----------------------------------------------------------------------------------------------
void error_message(long code)
{
ErrorToString(code,err);
printf("\nError message = %s\n",err);
}
//----------------------------------------------------------------------------------------------
//----------------------------------------------------------------------------------------------
