Re: RCM6700 6 serial ports and fat

Hi Tom and thank you for your answer
All these WrPortI commands are automatically generated from the “Rabbit 
4000 I/O lib utility” program, and I don’t have the time to see what exactly 
do.
I suppose the progam knows.
The definitions that we are interested for are :
 
#define SERB_TXPORT 
PCDR
#define BDRIVE_TXD 4
#define SERB_RXPORT PCDR
#define BDRIVE_RXD 
5
All the above normally redirect the serial port 
B  to PC4,PC5 
And the port works fine but with the port closed 
for example when you format the ‘a’ partition the printer connected to serial 
portB print many “!@#@$#” . 
But only in format. When the port is closed you 
can access the fat and the printer is silent  and after you can print (I think 
this is not a safe method because I have the example of the format and in a 
combination in the future I will have problem). 
I think that PD4,PD5,PC4,PC5 are by two connected 
together in the module’s PCB or the above definitions are invisible in some lib 
routines. 
Anyway , as I saw the only way (to be sure) is to 
forget the serial port B when you have to work with the fat.   
Thank’s   
Akis
 

________________________________
 From: Tom Collins <tom-lnEA/wrDJtNWk0Htik3J/[email protected]>
To: [email protected] 
Sent: Thursday, July 26, 2012 7:29 PM
Subject: Re: [rabbit-semi] RCM6700 6 serial ports and fat
  

 
   
 
I'm a little concerned about all of the WrPortI() commands.  The whole point of the serial port macro definitions is for the serial library to do that work for you when you call serXopen().

Instead of actually writing the registers, change your code to print something out if the shadow register doesn't match what you're trying to set it to.  Then, look up the register definition and see why the library has set the register differently than how you're trying to set it.

Overwriting an entire register like that is only a good idea if you know exactly what you're doing and why you're doing it.  If you only need to change some of the bits, then use the shadow register to keep the bits you aren't changing, or use BitWrPortI() to limit your changes to certain bits.


-Tom
  

On Jul 25, 2012, at 5:01 PM, akisppoli wrote:

  
>Hi all
>
>I have a problem using an RCM6700 with the 6 serial ports enabled and the fat filesystem. In datasheets i saw that rcm uses the serial port B 
>pins to drive the serial flash (PD4,PD5,PD6). In IOconfig i have change the serial portB to pins PC4,PC5. In this configuration if the serial port B is closed, the fat works fine but if is opened some times the fat works ans some times blocks (is in blocking mode) randomly.
>There is another define that i missed? I will test to open the portB only when i need it (when i use it i dont need the fat) but is a safe method ?
>
>Below is all the definitions
>
>#define AINBUFSIZE  31
>#define AOUTBUFSIZE  31
>#define SERA_TXPORT  PCDR
>#define ADRIVE_TXD  6
>#define SERA_RXPORT  PCDR
>#define ADRIVE_RXD  7
>#define BINBUFSIZE  31
>#define BOUTBUFSIZE  31
>#define SERB_TXPORT  PCDR
>#define BDRIVE_TXD  4
>#define SERB_RXPORT  PCDR
>#define BDRIVE_RXD  5
>#define CINBUFSIZE  31
>#define COUTBUFSIZE  31
>#define SERC_TXPORT  PCDR
>#define CDRIVE_TXD  2
>#define SERC_RXPORT  PCDR
>#define CDRIVE_RXD  3
>#define DINBUFSIZE  31
>#define DOUTBUFSIZE  31
>#define SERD_TXPORT  PCDR
>#define DDRIVE_TXD  0
>#define SERD_RXPORT  PCDR
>#define DDRIVE_RXD  1
>#define EINBUFSIZE  31
>#define EOUTBUFSIZE  31
>#define SERE_TXPORT  PEDR
>#define EDRIVE_TXD  6
>#define SERE_RXPORT  PEDR
>#define EDRIVE_RXD  7
>#define FINBUFSIZE  31
>#define FOUTBUFSIZE  31
>#define SERF_TXPORT  PDDR
>#define FDRIVE_TXD  2
>#define SERF_RXPORT  PEDR
>#define FDRIVE_RXD  3
>
>and the settings
>
>serAopen(9600L);
>WrPortI(SACR,&SACRShadow, 0x01);
>serBopen(9600L);
>WrPortI(SBCR,&SBCRShadow, 0x01);
>serCopen(2400L);
>WrPortI(SCCR,&SCCRShadow, 0x01);
>serDopen(2400L);
>WrPortI(SDCR,&SDCRShadow, 0x01);
>serEopen(2400L);
>WrPortI(SECR,&SECRShadow, 0x21);
>serFopen(2400L);
>WrPortI(SFCR,&SFCRShadow, 0x11);
>
>WrPortI(PBDDR,&PBDDRShadow,0xDC);     // Port B Input and output Pins
>WrPortI(PCFR,&PCFRShadow,0x55);     // Serial Port C
>WrPortI(PDALR,&PDALRShadow,0x30);     // Serial Port F
>WrPortI(PDDDR,&PDDDRShadow,0x64);     // Serial Port F 
>WrPortI(PDFR,&PDFRShadow,0x04);     // Serial Port F
>WrPortI(PEAHR,&PEAHRShadow,0x30);     // Serial Port E
>WrPortI(PEDDR,&PEDDRShadow,0x40);     // Serial Port E
>WrPortI(PEFR,&PEFRShadow,0x40);     // Serial Port E
>WrPortI(SACR,&SACRShadow,0x01);     // Serial Port A
>WrPortI(SBCR,&SBCRShadow,0x01);     // Serial Port B
>WrPortI(SCCR,&SCCRShadow,0x01);     // Serial Port C
>WrPortI(SDCR,&SDCRShadow,0x01);     // Serial Port D
>WrPortI(SECR,&SECRShadow,0x21);     // Serial Port E
>WrPortI(SFCR,&SFCRShadow,0x11);     // Serial Port F
>
>Thank's
>
>Akis
>
>