Re: 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
> 
>