FORUM

Naar aanleiding van enkele problemen heeft de auteur nog eens naar de software gekeken. Hieruit is het volgende gebleken:

Contrary to what some readers have written there is no bug in the firmware CUSTOM_TAD. If it is compiled with MPLAB C18 C Compiler v3.02 as described in the magazine, in the section ‘PIC Firmware’, it compiles perfectly (6 warnings appear, without importance) and the .hex file is generated without problems.

However, if the firmware is compiled with a later version of the C18 Compiler, for instance, with MPLAB C18 C Compiler v3.14 (recent version), some errors appear that inhibit compilation. To be able to compile successfully, the following modifications must be made:

1. File main.c, line 52
Text: #pragma config FCMEM = OFF
Should be: #pragma config FCMEN = OFF

2. File user.c, line 76
Text: OpenPWM2(0xFF);
Should be: TRISCbits.TRISC1=0; CCP2CON=0b00001111;

3. File user.c, line 79
Text: OpenADC(ADC_FOSC_64 & ADC_RIGHT_JUST & ADC_6_TAD,ADC_CH0 & ADC_INT_OFF & ADC_VREFPLUS_VDD & ADC_VREFMINUS_VSS,7);
Should be: OpenADC(ADC_FOSC_64 & ADC_RIGHT_JUST & ADC_6_TAD,ADC_CH0 & ADC_INT_OFF & ADC_REF_VDD_VSS,7);

These tree changes are indispensable. After making the changes the firmware is compiled perfectly (6 warnings appear, without importance) and the .hex file is generated correctly.

To be able to execute the software for the PC it is necessary that Microsoft .NET Framework is installed (free downloaded from Microsoft via Windows Update).