[ts-7000] TS-7400 DIO and UARTS 0,1,and 2

[Jayne Dickinson <>]

Greetings,

We have developed our own daughter card to interface with the TS-7400 
motherboard's lower header pins

UART0_TX = lower pin #22 = DIO_18
UART0_RX = lower pin #23 = DIO_19

UART1_TX = lower pin #25
UART1_RX = lower pin #24

UART2_TX = lower pin #21 = DIO_17
UART2_RX = lower pin #20 = DIO_16


I am booting directly from flash ( using busybox ) and downloaded a simple test 
and also the ts_utils ( test7400DIO )
and having difficulty getting the built-in UART0 to send and receive data....

I disabled the /sbin/getty for UART0 in /etc/inittab... I've setup the UART0 to 
use DIO_18 and DIO_19

Is there another serial driver I need to install, I only want the TTL Uarts...

------------------------------------------------------------------------------------------------------------------------------------------------------------

Here's the result of lsmod

$ lsmod
Module                  Size  Used by    Tainted: P
vfat                   10140   0 (unused)
tsuart0                 8880   0
fat                    29608   0 [vfat]
bootloader              3040   0


$ uname -a
Linux ts7400-host1 2.4.26-ts11 #128 Tue Apr 8 13:34:20 MST 2008 armv4l unknown


$ ./test7400DIO
.0 -> 1 (HI) failed [5555] [0001]
.2 -> 3 (HI) failed [5555] [0004]
.4 -> 5 (HI) failed [5555] [0010]
.6 -> 7 (HI) failed [5555] [0040]
.8 -> 9 (HI) failed [5555] [0100]
.10 -> 11 (HI) failed [5555] [0400]
.12 -> 13 (HI) failed [5555] [1000]
.14 -> 15 (HI) failed [5555] [4000]
.0 -> 1 (LO) failed [5555] [7FFE]
.2 -> 3 (LO) failed [5555] [7FFB]
.4 -> 5 (LO) failed [5555] [7FEF]
.6 -> 7 (LO) failed [5555] [7FBF]
.8 -> 9 (LO) failed [5555] [7EFF]
.10 -> 11 (LO) failed [5555] [7BFF]
.12 -> 13 (LO) failed [5555] [EFFF]
.14 -> 15 (LO) failed [5555] [BFFF]
.........0 <- 1 (LO) failed [AAAA] [FFFD]
.2 <- 3 (LO) failed [AAAA] [FFF7]
.4 <- 5 (LO) failed [AAAA] [FFDF]
.6 <- 7 (LO) failed [AAAA] [FF7F]
.8 <- 9 (LO) failed [AAAA] [FDFF]
.10 <- 11 (LO) failed [AAAA] [F7FF]
.12 <- 13 (LO) failed [AAAA] [DFFF]
.14 <- 15 (LO) failed [AAAA] [7FFF]
Done with 24 errors


Here my sample source to initialize the TS7400 so UART0 will use DIO_18 and 
DIO_19
///////////////////////////////////////////////////////
// setup DIO and data direction for uarts 0,1,and 2
///////////////////////////////////////////////////////
int ts7400_UartInit ( void )
{
    int status = -1;
    int memfd = -1;
    char *uartregs;

    //////////////////////////////////////////////////////////////
    // access internal TS7400 registers from userspace
    //////////////////////////////////////////////////////////////
    memfd = -1;
    memfd = open ( "/dev/mem", (O_RDWR | O_SYNC ));
    if ( memfd > 0 )
    {

         //////////////////////////////////////////////////////////
         // setup uart on DIO_18 and DIO_19
         //////////////////////////////////////////////////////////
         uartregs = NULL;
         uartregs = (char *)mmap(0, 4096, (PROT_READ| PROT_WRITE),
                                  MAP_SHARED, memfd, 0x12000000 );

         if ( uartregs != NULL )
         {
             //////////////////////////////////////////////////////////
             // enable UART 0 on DIO pins 18-19
             //////////////////////////////////////////////////////////
             printf("previous uartregs[0] = 0x%x \n", uartregs[0] );
             uartregs[0] = 0x01;
             printf("current uartregs[0] = 0x%x \n", uartregs[0] );

             //////////////////////////////////////////////////////////
             // set up DIO_18 out and DIO_17 out
             //////////////////////////////////////////////////////////
             printf("previous uartregs[1] = 0x%x \n", uartregs[1] );
             uartregs[1] = 0x66;
             printf("current uartregs[1] = 0x%x \n", uartregs[1] );
         }
         else
         {
             printf("mmap of 0x12000000 failed...exit! \n");
             close ( memfd );
             return ( CM_SERIAL_MMAP_ERR );
         }
    }
    else
    {
       printf("ts7400SerialInit: open to /dev/mem failed!!\n");
       status = CM_SERIAL_OPEN_MEM_ERR;
    }

    return ( status );
}

Results when I run my simple test...

$ ./tsSerialTest
opened iomap ...
previous uartregs[0] = 0x23
current uartregs[0] = 0x21
previous uartregs[1] = 0x2f
current uartregs[1] = 0x6f


Has anyone else done this with the TS-7400??
Thanks in advance!
Jayne



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