A Defines Request

[BobP]

Hi Kirk,

If you can use bulbs you will see the PWM better. Let us know how you get on?

Bob

[Kirk Fraser]

I put in the program revision below but again nothing happened. Since all my stuff is already posted earlier, I thought just discussing this section would be most efficient. Any discussion on content or how I can learn to improve the content is welcome. Thanks.

'*** Start of help request ***
DEFINE OSC 48
@ __CONFIG _CONFIG1L, _PLLDIV_1_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L
@ __CONFIG _CONFIG1H, _FOSC_HSPLL_HS_1H
@ __CONFIG _CONFIG2H, _WDT_OFF_2H & _WDTPS_512_2H
@ __CONFIG _CONFIG2L, _PWRT_ON_2L & _VREGEN_ON_2L
@ __CONFIG _CONFIG3H, _PBADEN_OFF_3H & _MCLRE_OFF_3H
@ __CONFIG _CONFIG4L, _LVP_OFF_4L & _XINST_OFF_4L
ADCON0 = 3 ' Setup PortA.0 for A/D function
OSCCON = %01110000
'*** End of help request ***

[Kirk Fraser]

Has anyone gotten the and RCTIME and PWM commands to work? I looked at a C18 program and it looks like one may have to do so much low-level progamming that I wonder if there's more that PB doesn't do besides the config bits.

Here's my latest failure:

DEFINE OSC 48
@ __CONFIG _CONFIG1L, _PLLDIV_12_1L & _CPUDIV_OSC4_PLL6_1L & _USBDIV_2_1L
@ __CONFIG _CONFIG1H, _FOSC_HSPLL_HS_1H & _FCMEM_OFF_1H & _IESO_OFF_1H
@ __CONFIG _CONFIG2L, _VREGEN_ON_2L & _PWRT_OFF_2L & _BOR_OFF_2L & _BORV_28_2L
@ __CONFIG _CONFIG2H, _WDT_OFF_2H & _WDTPS_32768_2H
@ __CONFIG _CONFIG3H, _MCLRE_ON_3H & _LPT1OSC_OFF_3H & _PBADEN_ON_3H & _CCP2MX_ON_3H
@ __CONFIG _CONFIG4L, _STVREN_ON_4L & _LVP_OFF_4L & _ICPRT_OFF_4L & _XINST_OFF_4L
@ __CONFIG _CONFIG5L, _CP0_OFF_5L & _CP1_OFF_5L & _CP2_OFF_5L & _CP3_OFF_5L
@ __CONFIG _CONFIG5H, _CPB_OFF_5H & _CPD_OFF_5H
@ __CONFIG _CONFIG6L, _WRT0_OFF_6L & _WRT1_OFF_6L & _WRT2_OFF_6L & _WRT3_OFF_6L
@ __CONFIG _CONFIG6H, _WRTB_OFF_6H & _WRTC_OFF_6H & _WRTD_OFF_6H
@ __CONFIG _CONFIG7L, _EBTR0_OFF_7L & _EBTR1_OFF_7L & _EBTR2_OFF_7L & _EBTR3_OFF_7L
@ __CONFIG _CONFIG7H, _EBTRB_OFF_7H

I checked the bit configuration above with the PIC18F4550 part of the PIC18 Configuration Settings Addendum, so the above is at least legal syntax, even though I don't know what most of it means. Then I checked the above with the bits which worked to get LED's to flash. I discovered a few differences.

DEFINE OSC 8
@ __CONFIG _CONFIG1L, _PLLDIV_5_1L & _CPUDIV_OSC1_PLL2_1L & _USBDIV_2_1L
@ __CONFIG _CONFIG1H, _FOSC_INTOSCIO_EC_1H
@ __CONFIG _CONFIG2H, _WDT_ON_2H & _WDTPS_512_2H
@ __CONFIG _CONFIG3H, _PBADEN_OFF_3H & _MCLRE_OFF_3H
@ __CONFIG _CONFIG4L, _LVP_OFF_4L & _ICPRT_OFF_4L &_XINST_OFF_4L
OSCCON = %01110000

Some bits are identical, some are set opposite or differently, and some are new while many are ignored in the working application. So I started looking up the differences in the data sheet and found deeper layers which I don't understand. Apparently each group of pins has its own set of potential configurations. I don't even know how to write things from the pin layer based on the table in the data sheet for example in chapter 10.0 I/O PORTS starting on page 113 of the PIC18F4550 data sheet, tables 10-1 and 10-2.

Is there an example of how to set up the bits so a program like mine, posted above, with RCTIME and PWM commands, to make the program work? Thank you.