I got the code working. Apparently there is a bug in picbasic that gives problem with the AD on a 16F690. Therefore I made my own code to get the analogue value.
The code:
Device 16F690 Config INTRC_OSC_NOCLKOUT, WDT_OFF, PWRTE_OFF, MCLRE_OFF XTAL = 8 OSCCON = %01110111 Dim spanning As Word Dim esr As Float Declare LCD_DTPIN PORTC.4 Declare LCD_ENPIN PORTC.3 Declare LCD_RSPIN PORTB.6 Declare LCD_LINES 2 TRISA.2 = 1 ADCON0 = %10000001 ANSEL = %00000100 ANSELH = %00000000 ADIN_RES = 10 ADIN_TAD = FRC ADIN_STIME = 500 Symbol lcdTijd = 600 Clear Cls Print At 1, 1, "ElektronicaStynu" Print At 2, 1, " ESR-Meter V1.2 " DelayMS lcdTijd Print At 1, 1, "lektronicaStynus" DelayMS lcdTijd Print At 1, 1, "ektronicaStynus." DelayMS lcdTijd Print At 1, 1, "ktronicaStynus.b" DelayMS lcdTijd Print At 1, 1, "tronicaStynus.be" DelayMS lcdTijd Cls Print At 1, 1, " ESR-Meter V1.2 " Print At 2, 1, " ESR = , " Print At 2, 16, $FE,$40,$00,$0E,$11,$11,$11,$0A,$1B,$00 While 1 = 1 GoSub AD_in spanning = spanning - 480 esr = spanning / 19 If esr > 27 Then Print At 2, 9, "Open " Else Print At 2, 9, DEC2 esr , " " EndIf DelayMS 550 Wend AD_in: ADCON0 = %10001001 DelayMS 510 ADCON0.1 = 1 While ADCON0.1 = 1 : Wend spanning = 0 spanning.HighByte = ADRESH spanning.LowByte = ADRESL Return End
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