forked from MirrorRepos/RomWBW
b1ackmai1er
5 years ago
7 changed files with 863 additions and 352 deletions
@ -0,0 +1,132 @@ |
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;================================================================================================== |
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; GENERIC CP/M ROUTINES |
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;================================================================================================== |
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; |
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BDOS .EQU 5 ;ENTRY BDOS |
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BS .EQU 8 ;BACKSPACE |
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TAB .EQU 9 ;TABULATOR |
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LF .EQU 0AH ;LINE-FEED |
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CR .EQU 0DH ;CARRIAGE-RETURN |
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; |
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CLIARGS .EQU $81 |
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RESTART .EQU $0000 ; CP/M restart vector |
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FCB .EQU $5C ; Location of default FCB |
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; |
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; OUTPUT TEXT AT HL |
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; |
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PRTSTR: LD A,(HL) |
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CP '$' |
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RET Z |
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CALL COUT |
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INC HL |
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JR PRTSTR |
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; |
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;Output WORD |
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;*********** |
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; |
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;PARAMETER: Entry WORD IN HL |
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;********* |
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; |
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OUTW: LD A,H |
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CALL OUTB |
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LD A,L |
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CALL OUTB |
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RET |
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; |
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;Output BYTE |
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;*********** |
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; |
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;PARAMETER: Entry BYTE IN A |
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;********* |
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; |
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OUTB: PUSH AF |
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RRCA |
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RRCA |
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RRCA |
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RRCA |
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AND 0FH |
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CALL HBTHE ;Change Half-BYTE |
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POP AF |
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AND 0FH |
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CALL HBTHE |
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RET |
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; |
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;Output HALF-BYTE |
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;**************** |
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; |
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;PARAMETER: Entry Half-BYTE IN A (BIT 0 - 3) |
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;********* |
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; |
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HBTHE: CP 0AH |
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JR C,HBTHE1 |
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ADD A,7 ;Character to Letter |
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HBTHE1: ADD A,30H |
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LD E,A |
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CALL PCHAR |
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RET |
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; |
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; |
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;Output on Screen |
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;**************** |
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; |
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PRBS: LD E,BS |
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CALL PCHAR |
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RET |
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; |
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;Output CR+LF on Screen |
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;********************** |
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; |
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NEWLINE: |
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LD E,CR |
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CALL PCHAR |
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LD E,LF |
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CALL PCHAR |
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RET |
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; |
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;Output ASCII-Character |
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;********************** |
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; |
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COUT: PUSH AF |
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LD E,A |
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CALL PCHAR |
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POP AF |
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RET |
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; |
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;CALL BDOS with Register Save |
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;**************************** |
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; |
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INCHA: LD C,1 ;INPUT CHARACTER TO A |
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JR BDO |
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PCHAR: LD C,2 ;PRINT CHARACTER IN E |
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JR BDO |
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PSTRIN: LD C,9 ;PRINT STRING |
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JR BDO |
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INBUFF: LD C,10 ;READ CONSOLE-BUFFER |
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JR BDO |
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CSTS: LD C,11 ;CONSOLE-STATUS |
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JR BDO |
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OPEN: LD C,15 ;OPEN FILE |
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JR BDO |
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CLOSE: LD C,16 ;CLOSE FILE |
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JR BDO |
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DELETE: LD C,19 ;DELETE FILE |
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JR BDO |
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READS: LD C,20 ;READ SEEK |
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JR BDO |
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WRITES: LD C,21 ;WRITE SEEK |
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JR BDO |
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MAKE: LD C,22 ;MAKE FILE |
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JR BDO |
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SETDMA: LD C,26 ;SET DMA-ADDRESS |
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BDO: PUSH HL |
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PUSH DE |
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PUSH BC |
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PUSH IX |
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PUSH IY |
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CALL BDOS |
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POP IY |
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POP IX |
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POP BC |
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POP DE |
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POP HL |
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RET |
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@ -0,0 +1,517 @@ |
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;================================================================================================== |
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; PCF8584 HD44780 I2C LCD UTILITY |
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; |
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; SOME GENERAL INFORMATION ON LCDS CAN BE SEEN HERE : FOCUSLCDS.COM/PRODUCT-CATEGORY/CHARACTER-LCD/ |
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; |
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;================================================================================================== |
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; |
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.ECHO "i2clcd\n" |
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; |
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#INCLUDE "pcfi2c.inc" |
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; |
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; LCD COMMANDS |
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; |
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LCDFSET .EQU 00100000B ; 20H |
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LCD4BIT .EQU 00000000B ; 00H |
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LCD2LIN .EQU 00001000B ; 08H |
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LCDDON .EQU 00000100B ; 04H |
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LCDDMOV .EQU 00001000B ; 07H |
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LCDSGRA .EQU 01000000B ; 04H |
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LCDSDRA .EQU 10000000B ; 80H |
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LCDEMS .EQU 00000100B ; 04H |
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LCDELFT .EQU 00000010B ; 03H |
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; |
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LCDPINE .EQU 00000100B ; PIN 2 |
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LCDPIND .EQU 00000001B ; PIN O |
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; |
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; |
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; STANDARD FORMATS - 8X1, 8X2, 16X1, 16X2, 16X4, 20X1, 20X2, 20X4, 24X2, 40X1, 40X2, 40X4 |
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; |
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TIMEOUT .EQU 255 |
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|
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.ORG 100H |
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|
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;INIT: CALL PCF_INIT |
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; |
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LD A,0 |
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LD (DEBUGF),A |
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; |
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CALL LCDINIT ; SETUP THE LCD THROUGH THE PCF8574 |
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|
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LD HL,LCDDATA ; DISPLAY TEXT AT HL |
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PUSH HL |
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CALL LCDSTR |
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POP HL |
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|
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CALL STOP ; CLOSE I2C CONNECTION |
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; |
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RET |
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|
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;----------------------------------------------------------------------------- |
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; |
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LCDLITE .DB 00001000B |
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; |
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LCDINIT: |
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; CALL DEBUG |
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; |
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LD A,I2CLCDW ; SET SLAVE ADDRESS |
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OUT (REGS0),A |
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; |
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LD A,0C5H ; GENERATE START CONDITION |
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OUT (REGS1),A ; AND ISSUE THE SLAVE ADDRESS |
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CALL CHKPIN |
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; |
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; CALL DEBUG |
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; |
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LD HL,LCDINIT1 |
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LD B,2 |
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CALL WLN |
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; |
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CALL DELAY |
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; |
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LD HL,LCDINIT2 |
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LD B,2 |
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CALL WLN |
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; |
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CALL DELAY |
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; |
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; NOW WE ARE IN 4 BIT MODE |
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; |
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LD A,+(LCDFSET | LCD4BIT | LCD2LIN) |
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CALL LCDCMD |
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LD A,+(LCDDON | LCDDMOV) |
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CALL LCDCMD |
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LD A,+(LCDEMS | LCDELFT) |
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CALL LCDCMD |
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LD A,LCDSDRA |
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CALL LCDCMD |
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; |
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RET |
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; |
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;----------------------------------------------------------------------------- |
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; |
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WLN: LD A,(HL) |
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OUT (REGS0),A ; PUT DATA ON BUS |
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CALL CHKPIN |
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INC HL |
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DJNZ WLN |
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RET |
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; |
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;----------------------------------------------------------------------------- |
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; DISPLAY STRING AT HL, TERMINATED BY 0 |
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; |
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LCDSTR: POP BC ; GET THE POINTER OF |
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POP HL ; THE TEXT TO DISPLAY |
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PUSH HL ; OFF THE STACK AND |
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PUSH BC ; PUT IT IN HL. |
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; |
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LCDST0: LD A,(HL) ; GET NEXT CHARACTER TO |
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OR A ; DISPLAY BUT RETURN |
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RET Z ; WHEN TERMINATOR REACHED |
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PUSH HL |
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; |
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CALL LCDATA ; OUTPUT TO LCD |
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POP HL |
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; RET C ; POINT TO NEXT |
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INC HL ; AND REPEAT |
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JR LCDST0 |
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; |
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;----------------------------------------------------------------------------- |
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; SEND BYTE IN A TO LCD IN 4-BIT MODE |
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; |
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LCDATA: PUSH DE |
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LD D,A |
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LD A,(LCDLITE) |
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OR +(LCDPINE | LCDPIND) |
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JP LCDSND |
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LCDCMD: PUSH DE |
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LD D,A |
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LD A,(LCDLITE) |
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OR LCDPINE |
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LCDSND: LD E,A |
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LD A,D |
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PUSH BC |
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LD C,11110000B |
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AND C |
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OR E |
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LD (LCDBUF),A |
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AND ~LCDPINE |
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LD (LCDBUF+1),A |
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LD A,D |
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RLC A |
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RLC A |
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RLC A |
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RLC A |
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AND C |
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OR E |
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LD (LCDBUF+2),A |
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AND ~LCDPINE |
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LD (LCDBUF+3),A |
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; |
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LD HL,LCDBUF ; OUTPUT 1 BYTE WHICH |
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LD B,4 ; REQUIRES A FOUR |
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CALL WLN ; BYTE SEQUENCE |
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; |
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POP BC |
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POP DE |
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RET |
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; |
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LCDDATA: |
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.DB "TEST HOW BIG IS THIS LINE DOES IT WRAP",0 |
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; |
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LCDINIT1: |
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.DB 00110100B |
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.DB 00011000B |
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; |
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LCDINIT2: |
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.DB 00100100B |
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.DB 00100000B |
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; |
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LCDBUF: |
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.DB 0, 0, 0, 0 ; BUFFER TO HOLD 4 BYTE SEQUENCE |
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|
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; FLASH DEVICE READ |
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; |
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|
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DEVMADR .EQU 0 |
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|
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READR: LD B,255 |
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DLY1: DJNZ DLY1 |
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; |
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LD A,D ; SET SLAVE ADDRESS |
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OUT (REGS0),A |
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; |
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LD A,0C5H ; GENERATE START CONDITION |
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OUT (REGS1),A ; AND ISSUE THE SLAVE ADDRESS |
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CALL CHKPIN |
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; |
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LD A,+(DEVMADR/256) |
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OUT (REGS0),A ; PUT ADDRESS MSB ON BUS |
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CALL CHKPIN |
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; |
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LD A,+(DEVMADR&$00FF) |
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OUT (REGS0),A ; PUT ADDRESS LSB ON BUS |
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CALL CHKPIN |
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; |
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LD A,045H ; START |
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OUT (REGS1),A |
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; |
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LD A,E ; ISSUE CONTROL BYTE + READ |
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OUT (REGS0),A |
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; |
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CALL READI2C ; DUMMY READ |
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JR NZ,ERREXT |
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; |
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READLP1:CALL READI2C |
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; JR Z,ERREXT |
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CP 1AH |
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PUSH AF |
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CALL COUT |
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POP AF |
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JR NZ,READLP1 |
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; |
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LD A,PCF_ES0 |
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OUT (REGS1),A |
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CALL CHKPIN |
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IN A,(REGS0) |
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CALL READI2C |
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CALL STOP |
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; |
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CALL NEWLINE |
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; |
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RET |
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; |
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;----------------------------------------------------------------------------- |
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;----------------------------------------------------------------------------- |
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RESET: LD A,0C2H ; STOP |
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OUT (REGS1),A |
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LD B,255 |
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DLY2: DJNZ DLY2 |
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LD A,0C1H |
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OUT (REGS1),A |
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RET |
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|
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|
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RDSTAT: LD BC,-1 |
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STATLP: IN A,(REGS1) |
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AND 1 |
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RET Z |
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LD A,B |
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OR C |
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DEC BC |
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JR NZ,STATLP |
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LD A,'T' |
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JP ERREXTT |
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; |
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ERREXT: LD A,'Q' |
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JR ERR |
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|
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ERREXTT: POP HL |
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ERR: CALL COUT |
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CALL STOP |
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CALL RESET |
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RET |
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; |
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STOP: LD A,0C3H |
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OUT (REGS1),A |
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RET |
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; |
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DELAY: PUSH HL |
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LD HL,-1 |
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DLOOP: LD A,H |
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OR L |
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DEC HL |
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JR NZ,DLOOP |
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POP HL |
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RET |
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; |
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CHKPIN: IN A,(REGS1) ; POLL FOR |
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BIT 7,A ; TRANSMISSION |
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JP NZ,CHKPIN ; TO FINISH |
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|
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; IN A,(REGS1) ; CHECK FOR |
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BIT 3,A ; SLAVE |
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RET Z ; ACKNOWLEDGMENT |
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LD A,'A' |
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JP ERREXTT |
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; |
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; READ ONE BYTE FROM I2C |
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; RETURNS DATA IN A |
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; Z flag set is acknowledge received (correct operation) |
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; |
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READI2C: |
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IN A,(REGS1) ; READ S1 REGISTER |
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BIT 7,A ; CHECK PIN STATUS |
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JP NZ,READI2C |
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BIT 3,A ; CHECK LRB=0 |
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RET NZ |
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IN A,(REGS0) ; GET DATA |
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RET |
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; |
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DEBUG: PUSH AF |
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PUSH DE |
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LD A,'[' |
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CALL COUT |
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LD HL,DEBUGF |
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LD A,(HL) |
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INC (HL) |
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CALL HBTHE |
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LD A,']' |
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CALL COUT |
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POP DE |
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POP AF |
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RET |
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DEBUGF: .DB 00H |
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; |
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;----------------------------------------------------------------------------- |
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; |
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; LINUX DRIVER BASED CODE |
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; |
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; I2C_INB = IN A,(REGS0) |
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; I2C_OUTB = LD A,* | OUT (REGS0),A |
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; SET_PCF = LD A,* | OUT (REGS1),A |
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; GET_PCF = IN A,(REGS1) |
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; |
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;----------------------------------------------------------------------------- |
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I2C_START: |
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LD A,PCF_START_ |
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OUT (REGS1),A |
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RET |
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; |
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;----------------------------------------------------------------------------- |
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I2C_REPSTART: |
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LD A,PCF_START_ |
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OUT (REGS1),A |
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RET |
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; |
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;----------------------------------------------------------------------------- |
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I2C_STOP: |
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LD A,PCF_STOP_ |
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OUT (REGS1),A |
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RET |
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; |
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;----------------------------------------------------------------------------- |
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HANDLE_LAB: |
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|
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LABDLY .EQU 0F000H |
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|
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LD A,PCF_PIN |
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OUT (REGS1),A |
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LD A,PCF_ES0 |
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OUT (REGS1),A |
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; |
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LD HL,LABDLY |
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LABLP LD A,H |
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OR L |
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DEC HL |
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JR NZ,LABLP |
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; |
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IN A,(REGS1) |
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RET |
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; |
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;----------------------------------------------------------------------------- |
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WAIT_FOR_BB: |
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; |
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BBTIMO .EQU 255 |
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; |
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LD HL,BBTIMO |
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BBNOTO IN A,(REGS1) |
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AND PCF_BB |
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RET Z |
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DEC HL |
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LD A,H |
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OR A |
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JR NZ,BBNOTO |
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CPL ; RET NZ IF TIMEOUT |
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BBNOTB RET ; RET Z IF BUS IS BUSY |
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; |
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;----------------------------------------------------------------------------- |
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WAIT_FOR_PIN: |
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; |
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; RETURN A=00/Z IF SUCCESSFULL |
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; RETURN A=FF/NZ IF TIMEOUT |
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; RETURN A=01/NZ IF LOST ARBITRATION |
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; |
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PINTIMO .EQU 16000 |
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; |
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LD HL,PINTIMO |
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PINNOTO IN A,(REGS1) |
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LD (STATUS),A |
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LD B,A |
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AND PCF_PIN |
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RET Z |
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DEC HL |
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LD A,H |
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OR A |
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JR NZ,PINNOTO |
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CPL ; RET NZ IF TIMEOUT |
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PINNOTB RET ; RET Z IF BUS IS BUSY |
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; |
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LD B,A |
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AND PCF_LAB |
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CALL HANDLE_LAB |
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LD (STATUS),A |
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XOR A |
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INC A |
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RET |
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; |
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STATUS .DB 00H |
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; |
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;----------------------------------------------------------------------------- |
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PCF_INIT: |
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LD A,PCF_PIN ; S1=80H: S0 SELECTED, SERIAL |
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OUT (REGS1),A ; INTERFACE OFF |
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NOP |
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IN A,(REGS1) ; CHECK TO SEE S1 NOW USED AS R/W |
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AND 07FH ; CTRL. PCF8584 DOES THAT WHEN ESO |
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JR NZ,INIERR ; IS ZERO |
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; |
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LD A,PCF_OWN ; LOAD OWN ADDRESS IN S0, |
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OUT (REGS0),A ; EFFECTIVE ADDRESS IS (OWN <<1) |
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NOP |
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IN A,(REGS0) ; CHECK IT IS REALLY WRITTEN |
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CP PCF_OWN |
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JR NZ,SETERR |
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; |
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LD A,+(PCF_PIN | PCF_ES1) ; S1=0A0H |
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OUT (REGS1),A ; NEXT BYTE IN S2 |
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NOP |
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IN A,(REGS1) |
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AND 07FH |
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CP PCF_ES1 |
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JR NZ,REGERR |
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; |
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LD A,PCF_CLK ; LOAD CLOCK REGISTER S2 |
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OUT (REGS0),A |
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NOP |
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IN A,(REGS0) ; CHECK IT'S REALLY WRITTEN, ONLY |
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AND 1FH ; THE LOWER 5 BITS MATTER |
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CP PCF_CLK |
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JR NZ,CLKERR |
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; |
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LD A,PCF_IDLE_ |
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OUT (REGS1),A |
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NOP |
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IN A,(REGS1) |
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CP +(PCF_PIN | PCF_BB) |
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JR NZ,IDLERR |
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|
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RET |
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; |
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;----------------------------------------------------------------------------- |
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PCF_SENDBYTES: ; HL POINTS TO DATA, BC = COUNT, A = 0 LAST A=1 NOT LAST |
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; |
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LD (LASTB),A |
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; |
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SB0: LD A,(HL) |
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OUT (REGS0),A |
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CALL WAIT_FOR_PIN |
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JR Z,SB1 |
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|
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CP 01H ; EXIT IF ARBITRATION ERROR |
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RET Z |
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|
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CALL I2C_STOP ; MUST BE TIMEOUT |
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LD A,055H ; ERROR |
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RET |
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|
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SB1: LD A,(STATUS) |
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AND PCF_LRB |
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JR NZ,SB2 |
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LD A,055H |
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; |
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SB2: LD A,B |
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OR C |
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INC HL |
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JR NZ,SB0 ; CHECK IF FINISHED |
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; |
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SBGOOD: LD A,(LASTB) |
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OR A |
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JR NZ,DB3 |
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CALL I2C_STOP |
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RET |
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DB3: CALL I2C_REPSTART |
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RET |
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; |
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LASTB .DB 00H |
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; |
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|
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; I2C_INB = IN A,(REGS0) |
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; I2C_OUTB = LD A,* | OUT (REGS0),A |
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; SET_PCF = LD A,* | OUT (REGS1),A |
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; GET_PCF = IN A,(REGS1) |
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|
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|
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; |
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;----------------------------------------------------------------------------- |
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|
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INIERR LD HL,NOPCF |
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CALL PRTSTR |
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RET |
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; |
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SETERR LD HL,WRTFAIL |
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CALL PRTSTR |
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RET |
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REGERR LD HL,REGFAIL |
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CALL PRTSTR |
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RET |
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; |
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CLKERR LD HL,CLKFAIL |
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CALL PRTSTR |
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RET |
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; |
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IDLERR LD HL,IDLFAIL |
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CALL PRTSTR |
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RET |
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; |
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NOPCF .DB "NO DEVICE FOUND",CR,LF,"$" |
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WRTFAIL .DB "SETTING DEVICE ID FAILED",CR,LF,"$" |
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REGFAIL .DB "CLOCK REGISTER SELECT ERROR",CR,LF,"$" |
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CLKFAIL .DB "CLOCK SET FAIL",CR,LF,"$" |
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IDLFAIL .DB "BUS IDLE FAILED",CR,LF,"$" |
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; |
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#INCLUDE "i2ccpm.inc" |
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; |
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BUFFER: .DS 256 |
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; |
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.END |
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