Hmm, I just did the unlock stuff and PPS on an 18F and it's a little=20
similar, although I am not familiar with the 33F instruction set (I mostly=
=20
use C nowadays)
The only thing I can see is that it says to write the unlock code to OSCCON=
=20
in the manual, but you write it to OSCCONL (unless I have missed something)
Also if you are using the SPI in master mode, why are you setting the slave=
=20
select enable bit? (SSEN)

--------------------------------------------------
From: "ivp" <joecolquitt@clear.net.nz>
Sent: Wednesday, September 08, 2010 3:24 AM
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Subject: [PIC] dsPIC33F, remapping and SPI

> Chaps,
>
> I have a dsPIC33FJ64GP802 application where I need the SPI buss
> for an SD card. For whatever reason I can't see SPI activity. Being
> so far quite unfamiliar with the dsPIC firmware I don't know whether
> I've got something missing in either the remapping or the SPI module
>
> The intention is have
>
> /CS on RP8, pin 17
> Din on RP9, pin 18
> Clk on RP10, pin 21
> Dout on RP11, pin 22
>
> Below is the relevant code I believed should have accomplish that. The
> micro does run. In the loop do_spi, an asterisk flashes at 1Hz on an LCD
>
> I've referred to the pdfs
>
> 70216B - Oscillator
> 70206C - Ports
> 70190C - SPI
> 70292C - Datasheet
>
> and user code at http://www.microchip.com/forums/m521952.aspx
>
> Any ideas please ?
>
> Joe
>
> ---------------------------------------
>
>         config __FOSCSEL,FNOSC_FRC      ;internal oscillator, no PLL
>         config __FWDT,FWDTEN_OFF        ;Watchdog Timer off
>         config __FPOR,FPWRT_PWR1        ;no brown-out reset
>         config __FGS,GSS_OFF & GWRP_OFF ;no code protect
>         config __FBS,NO_BOOT_CODE       ;no boot code
>         config __FOSC,IOL1WAY_ON        ;one-time IOLOCK disabled
>
>           mov     #0b0000000000001100,w0  ;RA2,RA3 (OSC) inputs
>           mov     w0,TRISA
>           mov     #0b0000001000000000,w0  ;all output except RP9
>           mov     w0,TRISB
>
>           clr     LATA
>           clr     LATB
>
>           mov     #0b0001111111111111,w0  ;no analogue
>           mov     w0,AD1PCFGL
>
>           mov     #0x0000,w0
>           mov     w0,CMCON                ;no comparators
>
>           mov     #0b0000010010110010,w0
> ;                     ---
> ;                        0             12   internal SPI clock enabled
> ;                         0            11   SDO1 controlled by module
> ;                          1           10   16-bit data
> ;                           -           9   input sampling position
> ;                            0          8   data change on L->H
> ;                             1         7   SS1 pin used for Slave mode
> ;                              0        6   idle low, active high
> ;                               1       5   master mode
> ;                                1      4   secondary pre-scale 4:1
> ;                                 0     3
> ;                                  0    2
> ;                                   1   1   primary pre-scale 4:1
> ;                                    0  0
>           mov     w0,SPI1CON1
>
>           clr     SPI1STAT
>           bset    SPI1STAT,#SPIEN         ;SPI1 module enabled
>
> ;OSCCONL Unlock Sequence
>
>           mov     #OSCCONL,w1
>           mov     #0x46,w2
>           mov     #0x57,w3
>           mov.b   w2,[w1]                 ;write 0x46 to OSCCONL
>           mov.b   w3,[w1]                 ;write 0x57 to OSCCONL
>           bclr    OSCCON,#IOLOCK          ;unlock remapping
>
> ;RP9R 00000 reset value, default pin
> ;RP8R 01001 RP8 tied to SPI1 Slave Select Output
>
>           mov     #0b0000000000001001,w0
> ;                     ---00000---01001
>           mov     w0,RPOR4
>
> ;SDO1 00111 RP11 tied to SPI1 Data Output
> ;SCK1 01000 RP10 tied to SPI1 Clock Output
>
>           mov     #0b0000011100001000,w0
> ;                     ---00111---01000
>           mov     w0,RPOR5
>
> ;SCK1R 11111 reset value, SPI1 Clock Input tied to Vss
> ;SDI1R 01001 SPI1 Data Input tied to RP9
>
>           mov     #0b0001111100001001,w0
>           mov     w0,RPINR20
>
>           mov     #OSCCONL,w1
>           mov     #0x46,w2
>           mov     #0x57,w3
>           mov.b   w2,[w1]                 ;write 0x0046
>           mov.b   w3,[w1]                 ;write 0x0057
>           bset    OSCCON,#IOLOCK          ;lock remapping
>
> clr_spifl: btsc    SPI1STAT,#SPITBF
>           bra     clr_spifl
>
> do_spi:    mov     #0x5555,w0
>           mov     w0,SPI1BUF
>           lcd_pos #0x0a
>           displ   #'*'
>           call    delaypt5
>           lcd_pos #0x0a
>           displ   #0x20
>           call    delaypt5
>           bra     do_spi
>
> *
> *
> **********
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