TM4C1231H6PM: 7-Segment problem

1. I want to use two 7-seg to count perasecond, but I can't turn on the 7-seg now, please help me check my code, maybe I lose something.

2. I have two 7-segment, how can I control them separately?

#include <stdbool.h>
#include <stdint.h>
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "inc/hw_uart.h"
#include "driverlib/debug.h"
#include "driverlib/fpu.h"
#include "driverlib/interrupt.h"
#include "driverlib/timer.h"
#include "driverlib/rom.h"
#include "driverlib/rom_map.h"
#include "driverlib/gpio.h"
#include "driverlib/gpio.c"
#include "driverlib/pin_map.h"
#include "driverlib/sysctl.h"
#include "driverlib/sysctl.c"
#include "driverlib/systick.h"
#include "driverlib/uart.h"
#include "driverlib/uart.c"
#include "driverlib/adc.h"

int
main(void)
{
    MAP_SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |
                   SYSCTL_XTAL_16MHZ);

    //
    MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);
    
    MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
    MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
    MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
    MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
    
    //
    MAP_GPIOPinConfigure(GPIO_PA0_U0RX);
    MAP_GPIOPinConfigure(GPIO_PA1_U0TX);
    
    //
    HWREG(GPIO_PORTF_BASE + 0x520) = 0x4C4F434B;
    HWREG(GPIO_PORTF_BASE + 0x524) = 0x00FF;
    HWREG(GPIO_PORTF_BASE + 0x420) = 0x0000;
    HWREG(GPIO_PORTF_BASE + 0x51C) = 0x001F;
    
    //
    MAP_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
    
    // 7-Seg_A : PB1 | 7-Seg_B : PD6 | 7-Seg_C : PF0
    // 7-Seg_D : PF1 | 7-Seg_E : PF2 | 7-Seg_F : PB0
    // 7-Seg_G : PD5    
    MAP_GPIOPinTypeGPIOOutput(GPIO_PORTB_BASE, GPIO_PIN_0 | GPIO_PIN_1);
    MAP_GPIOPinTypeGPIOOutput(GPIO_PORTD_BASE, GPIO_PIN_5 | GPIO_PIN_6);
    MAP_GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2);

    //
    MAP_UARTConfigSetExpClk(UART0_BASE, MAP_SysCtlClockGet(), 115200,
                        (UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE |
                         UART_CONFIG_PAR_NONE));

    while(1)
    {
        MAP_GPIOPinWrite(GPIO_PORTB_BASE, GPIO_PIN_1, GPIO_PIN_1);      //a
        MAP_GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_6, GPIO_PIN_1);      //b
        MAP_GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0, GPIO_PIN_0);      //c
        MAP_GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_1, GPIO_PIN_1);      //d
        MAP_GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_2, GPIO_PIN_2);      //e
        MAP_GPIOPinWrite(GPIO_PORTB_BASE, GPIO_PIN_0, GPIO_PIN_0);      //f
        MAP_GPIOPinWrite(GPIO_PORTD_BASE, GPIO_PIN_5, GPIO_PIN_5);      //g
    }
}