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解析：數(shù)組KBPinMap第11項(xiàng)與開發(fā)板對(duì)應(yīng)的33號(hào)(PC14)引腳輸出高電平并且被數(shù)組KBPinMap第6項(xiàng)與開發(fā)板對(duì)應(yīng)的1號(hào)(PA3)引腳接收到，這意味著這時(shí)鍵盤上對(duì)應(yīng)的這兩個(gè)引腳是對(duì)應(yīng)關(guān)系

Arduino源程序:

#define SWAP(x, y) \
(y) = (x) + (y); \
(x) = (y) - (x); \
(y) = (y) - (x);
//按鍵映射表，按需修改
//{探針id,接收id,ASCII}
byte KeyMap[][3]={
{5,19,'1'},
{5,18,'2'},
{6,19,'3'},
{8,19,'6'},
{8,18,'7'},
{9,19,'8'},
{5,17,'q'},
{5,20,'w'},
{6,18,'e'},
{8,17,'y'},
{9,17,'u'},
{9,18,'i'},
{10,20,'o'},
{5,21,'a'},
{6,20,'s'},
{6,17,'d'},
{8,20,'h'},
{9,20,'j'},
{9,21,'k'},
{10,21,'l'},
{5,22,'z'},
{6,21,'x'},
{6,22,'c'},
{8,22,'b'},
{8,21,'n'},
{9,22,'m'},
{10,22,'<'},
{11,22,'>'},
{11,21,'/'},
};
//KBPinMap 按照鍵盤排線接入開發(fā)板的順序填寫引腳設(shè)定
// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
int KBPinMap[] = {PB12, PB13, PB14, PB15, PC13, PA4, PA3, PA2, PA1, PA0, PC15, PC14, PB5, PB6, PB7, PB8, PB9, PB11, PB10, PB0, PB1, PA7, PA6, PA5};
int KBScan[] = {0};
/*
@函數(shù) ScanKeyMap
@作用搜索按鍵映射表并輸出按鍵映射
@傳入
byte a 探針id
byte b 接收id
@傳出
char
*/
char ScanKeyMap(byte a,byte b){
if (a>b) {
byte c=a;
a=b;
b=c;
}
for (int i=0;i<sizeof(KeyMap)/sizeof(KeyMap[0]);i++) {
if (KeyMap[i][0]==a&&KeyMap[i][1]==b) return KeyMap[i][2];
}
char printBuffer[50];
sprintf(printBuffer, "--- error a:%d b:%d ---",a,b);
Serial1.print(printBuffer);
return 0;
}
/*
@函數(shù) ScanPin
@作用使能某個(gè)引腳作用為探針，并對(duì)接收腳進(jìn)行掃描
@傳入
int KBPinMapNum 探針引腳
@傳出 -
*/
void ScanPin(int KBPinMapNum) {
//設(shè)置所有引腳為輸入模式
AllPinIN();
//設(shè)置探針引腳輸出
pinMode(KBPinMap[KBPinMapNum], OUTPUT);
digitalWrite(KBPinMap[KBPinMapNum], HIGH);
//輪詢引腳，是否有輸出電平
char printBuffer[50];
for (int i = 0; i < sizeof(KBPinMap) / sizeof(KBPinMap[0]); i++) {
if (i == KBPinMapNum) continue; //跳過(guò)探針引腳
if (analogRead(KBPinMap[i])>2000) {
KBScan[i] = 1;
sprintf(printBuffer, "%c # 探針[%d]:%d -> 接收[%d]:%d",ScanKeyMap(KBPinMapNum,i), KBPinMapNum, KBPinMap[KBPinMapNum], i, KBScan[i]);
Serial1.println(printBuffer);
}
}
}
/*
@函數(shù) ClearKBScan
@作用清除接收引腳狀態(tài)表
@傳入 -
@傳出 -
*/
void ClearKBScan() {
memset(KBScan,0,sizeof(KBScan) / sizeof(KBScan[0]));
/*
for (int i = 0; i < sizeof(KBScan) / sizeof(KBScan[0]); i++)
KBScan[i] = 0;
*/
}
/*
@函數(shù) AllPinOut
@作用全部引腳IO設(shè)置為輸出模式
@傳入 -
@傳出 -
*/
void AllPinOut() {
for (int i = 0; i < sizeof(KBPinMap) / sizeof(KBPinMap[0]); i++) {
pinMode(KBPinMap[i], OUTPUT);
digitalWrite(KBPinMap[i], HIGH);
}
}
/*
@函數(shù) AllPinIN
@作用全部引腳IO設(shè)置為輸入模式
@傳入 -
@傳出 -
*/
void AllPinIN() {
for (int i = 0; i < sizeof(KBPinMap) / sizeof(KBPinMap[0]); i++)
pinMode(KBPinMap[i], INPUT_PULLDOWN);
}
/*
@函數(shù) SerialPrintAllKBScan
@作用串口輸出引腳狀態(tài)表
@傳入 -
@傳出 -
*/
void SerialPrintAllKBScan() {
char printBuffer[50];
for (int i = 0; i < sizeof(KBPinMap) / sizeof(KBPinMap[0]); i++) {
sprintf(printBuffer, "[%d]-%d ", i, KBScan[i]);
Serial1.print(printBuffer);
}
Serial1.print("\n\r");
}
void setup() {
Serial1.begin(115200);
Serial1.println(" *]]*");
Serial1.println(" *]]OOO@@@@| ");
Serial1.println(" ,]]|OOO@@@@@@@@@@| ");
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