7脚 LED数码屏的刷新显示，乱码请指正

我是新手近段时间的工作是点亮7脚LED数码屏，刷新时遇到了困惑请大家帮助指正，在此表示非常感谢。
下面是7脚LED数码屏结构图。
用了7个 case下面是刷新代码

switch(ScanPinNum)
{
// ---------------- CASE1: PIN1------------------------
case 1:
if(gDispBuff[1] & SEG_A) {LED_PIN2_IN_ON;} // A → PIN2
if(gDispBuff[1] & SEG_B) {LED_PIN3_IN_ON;} // B → PIN3
if(gDispBuff[1] & SEG_C) {LED_PIN4_IN_ON;} // C → PIN4
if(gDispBuff[1] & SEG_D) {LED_PIN5_IN_ON;} // D → PIN5
if(gDispBuff[1] & SEG_E) {LED_PIN6_IN_ON;} // E → PIN6
if(gDispBuff[1] & SEG_F) {LED_PIN7_IN_ON;} // F → PIN7
LED_PIN1_OUT_HIGH;
break;

// ---------------- CASE2: PIN2--------------------------------
case 2:
if(gDispBuff[0] & SEG_A) {LED_PIN1_IN_ON;}
if(gDispBuff[1] & SEG_G) {LED_PIN3_IN_ON;}
if(gDispBuff[4] & SEG_E) {LED_PIN4_IN_ON;}
if(gDispBuff[4] & SEG_H) {LED_PIN5_IN_ON;}
if(gDispBuff[4] & SEG_F) {LED_PIN6_IN_ON;} //
if(gDispBuff[4] & SEG_G) {LED_PIN7_IN_ON;} //
LED_PIN2_OUT_HIGH;
break;

// ---------------- CASE3: PIN3--------------------------------
case 3:
if(gDispBuff[0] & SEG_B) {LED_PIN1_IN_ON;}
if(gDispBuff[0] & SEG_G) {LED_PIN2_IN_ON;}
if(gDispBuff[3] & SEG_A) {LED_PIN4_IN_ON;}
if(gDispBuff[3] & SEG_B) {LED_PIN5_IN_ON;}
if(gDispBuff[3] & SEG_C) {LED_PIN6_IN_ON;}
if(gDispBuff[3] & SEG_D) {LED_PIN7_IN_ON;}
LED_PIN3_OUT_HIGH;
break;

// ---------------- CASE4: PIN4 ---------------------------------------
case 4:
if(gDispBuff[0] & SEG_C) {LED_PIN1_IN_ON;}
if(gDispBuff[4] & SEG_A) {LED_PIN2_IN_ON;}
if(gDispBuff[2] & SEG_A) {LED_PIN3_IN_ON;}
if(gDispBuff[3] & SEG_E) {LED_PIN5_IN_ON;}
if(gDispBuff[3] & SEG_F) {LED_PIN6_IN_ON;}
if(gDispBuff[3] & SEG_G) {LED_PIN7_IN_ON;}
LED_PIN3_OUT_HIGH;
break;


// ---------------- CASE5: ------ PIN5---------------------------------------------
case 5:
if(gDispBuff[0] & SEG_D) {LED_PIN1_IN_ON;}
if(gDispBuff[4] & SEG_B) {LED_PIN2_IN_ON;}
if(gDispBuff[2] & SEG_B) {LED_PIN3_IN_ON;}
if(gDispBuff[2] & SEG_E) {LED_PIN4_IN_ON;}
LED_PIN5_OUT_HIGH;
break;

// ---------------- CASE6: ------ PIN6-----------------------------------
case 6:
if(gDispBuff[0] & SEG_E) {LED_PIN1_IN_ON;}
if(gDispBuff[4] & SEG_C) {LED_PIN2_IN_ON;}
if(gDispBuff[2] & SEG_C) {LED_PIN3_IN_ON;}
if(gDispBuff[2] & SEG_F) {LED_PIN4_IN_ON;}
break;

// ---------------- CASE7: PIN7 ---------------------------
case 7:
if(gDispBuff[0] & SEG_F) {LED_PIN1_IN_ON;}
if(gDispBuff[4] & SEG_D) {LED_PIN2_IN_ON;}
if(gDispBuff[2] & SEG_D) {LED_PIN3_IN_ON;}
if(gDispBuff[2] & SEG_G) {LED_PIN4_IN_ON;}
LED_PIN4_OUT_HIGH;
break;

default:
break;
}
}

#endif
点亮7脚LED数码屏刷新时，只有部分段点亮而且乱码。请给位老师指正非常感谢。