;********************************************************************** ; * ; 8 Channel PWM LED Chaser for PIC 16F628/A * ; * ; Filename: pro481v207.asm * ; Date: 27/10/2010 * ; File Version: 2.0.7 * ; * ; Author: Pete Griffiths * ; Company: http://picprojects.org.uk * ; * ; Written and assmbled under MPLAB Version 8.20 * ; * ; Before assembling code set correct PIC processor in MPLAB * ; from menu option Configure - Select Device * ; * ; Now works with 16F84A, 16F627/628 16F627A/628A and 16F88 * ; * ; The devices with 1K program memory (16F84A, 16F627/627A * ; will need some Sequences in pwmc_SeqData.inc file removing * ; to fit the code in their limited memory. * ; * ; 27/10/2010 * ; * ; PWM LED Chaser variant code for use with PCB480C only * ; * ;********************************************************************** ; * ; Notes: * ; 1. PIC 16F628A datasheet can be downloaded from * ; http://ww1.microchip.com/downloads/en/DeviceDoc/40044b.pdf * ; * ; 2. See also MPASM User Guide(UG) which can be downloaded from: * ; http://ww1.microchip.com/downloads/en/DeviceDoc/33014J.pdf * ; http://picprojects.org.uk/projects/ledchaser/ * ; * ; 3. This code uses Pseudo-instructions listed in the MPASM User * ; guide, Part 4, Appendix A.5 * ; * ; 4. For list of Radix types see MPASM UG Section 3.4, Table 3-3 * ; * ;********************************************************************** ifdef __16F88 #include ;Program Configuration Register 1 __CONFIG _CONFIG1, _CP_OFF & _CCP1_RB0 & _DEBUG_OFF & _WRT_PROTECT_OFF & _CPD_OFF & _LVP_OFF & _BODEN_ON & _MCLR_ON & _PWRTE_ON & _WDT_OFF & _INTRC_IO ;Program Configuration Register 2 __CONFIG _CONFIG2, _IESO_OFF & _FCMEN_OFF #define T0IF TMR0IF #define T0IE TMR0IE endif ifdef __16F627A #include ; Standard include file ; defines processor specific variable definitions ; See MPASM UG Section 4.41 ;------------------------------------------------------------------------------------ ; '__CONFIG' directive is used to embed configuration data within .asm file. ; The lables following the directive are located in the respective .inc file. ; See respective data sheet for additional information on configuration word. ; and also see MPASM UG Section 4.12 __CONFIG _CP_OFF & _WDT_ON & _PWRTE_ON & _INTRC_OSC_NOCLKOUT & _LVP_OFF endif ifdef __16F628A #include ; Standard include file ; defines processor specific variable definitions ; See MPASM UG Section 4.41 ;------------------------------------------------------------------------------------ ; '__CONFIG' directive is used to embed configuration data within .asm file. ; The lables following the directive are located in the respective .inc file. ; See respective data sheet for additional information on configuration word. ; and also see MPASM UG Section 4.12 __CONFIG _CP_OFF & _WDT_ON & _PWRTE_ON & _INTRC_OSC_NOCLKOUT & _LVP_OFF endif ifdef __16F628 #include __CONFIG _CP_OFF & _WDT_ON & _PWRTE_ON & _INTRC_OSC_NOCLKOUT & _LVP_OFF endif ifdef __16F627 #include __CONFIG _CP_OFF & _WDT_ON & _PWRTE_ON & _INTRC_OSC_NOCLKOUT & _LVP_OFF endif ifdef __16F84A ; **** 16F84A only has 1K of program memory - the default pwm_SeqData.inc file **** ; **** will not fit into the available memory, you must remove some of the **** ; **** the sequence data from the file before assembling the code **** #include __CONFIG _CP_OFF & _WDT_ON & _PWRTE_ON & _HS_OSC ; Code protect off ; Watch Dog timer off ; Power-up timer delay on ; change to _RC_OSC for resistor/capacitor ; change to _XT_OSC for crystal/resonator <3.5Mhz ; change to _HS_OSC for high speed crystal/resonator >3.5Mhz endif ;------------------------------------------------------------------------------------ ; Suppress specific warning messages ; see MPASM UG Section 4.29 for errorlevel directive ; see MPASM UG Section 8.4 for assembler message descriptions ; errorlevel -302 ; suppress banksel warning messages during assembly ;------------------------------------------------------------------------------------ ; define variables in General Purpose Register (GPR) memory ; See MPASM UG Section 4.8 ; note: 16F84A GPR start at 0x0C but most other mid-range PICs start at 0x20 ; We use 0x20 here for compatibilty with newer PICs cblock 0x20 firstGPR:0 ; mark start of GPR memory used state ; used by function state selector copyPORTB ; working variable, holds copy of PORTB vc0,vc1,vc2,vc3,vc4 ; vertical counter bits hiReload ; vertical counter reload hi loReload ; vertical counter reload lo pwm ; pwm counter holdTime ; sequence line hold time repeatCount ; repeat seqeunce count RandMask ; mask to AND random number with seqIdxLo ; Lo byte address index pointer to start of selected sequence seqIdxHi ; Hi byte address index pointer to start of selected sequence seqTotal ; Total number of sequences in data seqMatch ; working variable seqCount ; working variable forward ; working regsiter for mirroring data reverse ; working regsiter for mirroring data reloadTemp ; temporary holding variable for loReload tick ; timer0 ticks swTimer ; switch hold down timer flags ; function flags register mode ; mode flags register indexLo ; Lo byte sequence line data address pointer indexHi ; Hi byte sequence line data address pointer save_W ; save W during interupt save_Status ; save STATUS during interupt save_PCLATH ; save PCLATH saveModeTimerL ; holdoff timer for saving opmode to EEPROM high saveModeTimerH ; holdoff timer for saving opmode to EEPROM low eesave_W ; temp register used in EEPROM routings LFSRH ; Random number shift regsiter high byte LFSRL:0 ; Random number shift register low byte lastGPR ; mark last GPR register used ; (required by GPR initialisation code) endc ;-------------------------------------------------------------------------------------------------------------------- ; EEPROM data ; ; program parameters org 0x2100 de .0 de .1 de .0 ; embed firmware release info de " PRO481 PWM LED Chaser " de " V2.0.7 " de " 27/10/2010 " de " picprojects.org.uk " ;-------------------------------------------------------------------------------------------------------------------- ; Define bank select pseudo instructions to make code more readable #define bank0 bcf STATUS,RP0 ; Sel Bank 0 #define bank1 bsf STATUS,RP0 ; Sel Bank 1 ;-------------------------------------------------------------------------------------------------------------------- ; ; See MPASM UG Secdtion 4.27 for definition of equ directive switch equ 4 ; Port bit switch connected to cSAVETIME EQU d'4' ; holdoff timer constant for saving EEPROM data cTIMER EQU d'157' cTICKS EQU d'50' ; 4Mhz oscillator clock, gives TMR0 clock = 1Mhz. ; Write to timer0 inhibits clock for 2 clock cycles ; TMR0 prescaler of 1:2 gives ; 1Mhz / ((256-157+2) x 2) = 5Khz = 0.2mS ; 50 x 0.2mS = 10mS ; So the sequence hold time will be 10mS x holdTime, giving a range of ; 1 = 10mS thru 254 = 2.54S ; remember that a holdtime value of 255 indicates the end of the sequence so DON'T USE IT ; define flag bits fHoldTimeout EQU 0 ; flag set by ISR, cleared by Table Lookup function fSwitch EQU 1 ; flag fsetupRun EQU 2 ; 0=run mode / 1=setup mode fTick EQU 3 ; timer tick flag fSaveMode EQU 4 ; set indicates opmode needs writing to EEPROM, clear indicates no data to write ; 5 fMirrorData EQU 6 ; flag set, Table read reverses bits in data word [** This flag must be Bit 6 **] fMirrorNext EQU 7 ; flag tells code current sequence should be mirrored next time #define canMirror 1<