Josef Hanzal, M. S. [snail at iol.cz] of Snail Instruments +420-311-624433 says:
I have used SPI on PIC16C73 in slave mode to catch data sent to MAX7213 LED display driver. As far as I remember, it worked without much troubles. Extracted code below. The underscored bit names are #defines including the proper register, like #define _C STATUS,0CBLOCK __GPRAM TEMPW, TEMPS, TEMPF FLAGS ... SSPADR... .... ENDC CBLOCK 0x60 SSPDAT:SSPBLEN ENDC #define _FSSPDT FLAGS,6 ; ================================================================ ; INTERRUPT--INTERRUPT--INTERRUPT--INTERRUPT--INTERRUPT--INTERRUPT ; ================================================================ ORG 4 _INT_SAVE_REG TEMPW, TEMPS SSPINT: BTFSS _SSPIF GOTO INTER BCF _SSPIF BTFSC _FSSPDT ;flag indicates if address or data GOTO SSPI0 ;was received, it is MAX7213 specific MOVF SSPBUF,W ADDLW SSPDAT MOVWF SSPADR BSF _FSSPDT GOTO IEND SSPI0: MOVFF FSR,TEMPF MOVFF SSPADR,FSR MOVFF SSPBUF,INDF MOVFF TEMPF,FSR GOTO IEND INTER: BTFSS _INTF ;RB0 connected to CS of Maxim GOTO IEND BCF _INTF BCF _FSSPDT BSF _FDSUPD ;GOTO IEND IEND: _INT_RESTORE_REG TEMPW,TEMPS RETFIE SPI inicialization: LDB SSPCON,B'00110101' ;ENABLE SPI SLAVE, RECEIVE ON RISING EDGE LDB RCSTA,1<<SPEN|1<<CREN ;ENABLE RECEIVE, ENABLE SERIAL ASYNC. COMM. Macros: MOVFF S,D = MOVF S,W; MOVWF D LDB F,K = MOVLW K; MOVWF F
|file: /Techref/microchip/16c73/spislave.htm, 2KB, , updated: 2006/4/7 20:07, local time: 2022/1/23 16:19,
|©2022 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?|
<A HREF="http://piclist.com/techref/microchip/16c73/spislave.htm"> PIC Microcontoller Input / Ouput Method - 16C73 SPI Slave Mode</A>
|Did you find what you needed?|
PICList 2022 contributors:
o List host: MIT, Site host massmind.org, Top posters @20220123
* Page Editors: James Newton, David Cary, and YOU!
* Roman Black of Black Robotics donates from sales of Linistep stepper controller kits.
* Ashley Roll of Digital Nemesis donates from sales of RCL-1 RS232 to TTL converters.
* Monthly Subscribers: Gregg Rew. on-going support is MOST appreciated!
* Contributors: Richard Seriani, Sr.
Welcome to piclist.com!