[ts-7000] DIO2 Input Question TS-7300

["ellard.scott" <>]

Hello, I am new to the TS-7300 and am trying to get my DIO2 to work as
inputs. I have already successfully gotten them to work as outputs
using similar code. The output of this program reads 0 at all times.
I am using the 3.3V pin to get a voltage on to on of the input pins. 

I am trying to determine if it is either my code or how I am
connecting to the inputs that is the problem....



#define GPIOBASE        0x72000000
#define XDIO2_CTRLR     0x44
#define XDIO2_DATAR     0x45    
#define XDIO2_DDR       0x46

                int fd;        /* /dev/mem file descriptor  */
                int page_size = getpagesize();
                unsigned char *mem_addr  = NULL;
                unsigned int mem_phys  = GPIOBASE;
                unsigned char num;
                volatile unsigned char *port2_ctrl;
                volatile unsigned char *port2;
                volatile unsigned char *port2_dir;
                
                /* Open a page at the FPGA base address */
                fd = open("/dev/mem", O_RDWR | O_SYNC);
                if (fd < 0) {
                        printf("Open /dev/mem failed - %s\n", 
                                strerror(errno));
                        return -1;
                }
                mem_addr = (char *)mmap(
                        0,
                        page_size,
                        PROT_READ|PROT_WRITE,
                        MAP_SHARED,
                        fd,
                        mem_phys);
                if (mem_addr == (unsigned char *)MAP_FAILED) {
                        printf("Error: mmap failed\n");
                        close(fd);
                        return -1;
                }
                
                port2_ctrl = mem_addr + XDIO2_CTRLR;
                port2_dir  = mem_addr + XDIO2_DDR;      
                port2      = mem_addr + XDIO2_DATAR;    
                
                *port2_ctrl = 0;    /* IO mode */
                *port2_dir  = 0x00; /* All inputs */
                        
                while(1){
                        num = *port2;
                        printf("%X\n", num);
                }
                
                return 0;

Thank you,

Scott


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