8F328P-U 與 TM1637 LED數碼管驅動程序

eddiewwm

TM1637 is a multi-segment(8*6) LED driver with 8*2 scan keys.

a)      數據輸入的開始條件是CLK 為高電平時，DIO 由高變低

b)      在輸入時，當CLK 是高電平時，DIO 上的信號必須保持不變；只有CLK 上的時鐘信號為低電平時，DIO 上的信號才能改變

c)      結束條件是CLK 為高時，DIO 由低電平變為高電平

Key

S16

S15

S14

S13

S12

S11

S10

S9

S8

S7

S6

S5

S4

S3

S2

S1

Matrice

SG8   K1

SG8   K2

SG4   K2

SG4   K1

SG7   K1

SG7   K2

SG3   K2

SG3   K1

SG6   K1

SG6   K2

SG2   K2

SG2   K1

SG5   K1

SG5   K2

SG1   K2

SG1   K1

hex

F0

E8

EC

F4

F1

E9

ED

F5

F2

EA

EE

F6

F3

EB

EF

F7

Command:

Test Mode	0x48	01001000	test mode (internal use)
Normal Mode	0x40	01000000	the byte sent below is a datum towards the  display, with the automatic increase in destination addresses
	0x44	01000100	the byte sent below is a datum towards  the display, with the fixed destination addresses
	0x42	01000010	read the input situation
Display Control	0x80	10000000	display off
	0x88-0x8F	10001000-100001111	display on with brightness control, 7  step

/* Program for Display on TM1637 */

const int clock = 3;

const int data = 2;

/*0*/ /*1*/ /*2*/ /*3*/ /*4*/ /*5*/ /*6*/ /*7*/ /*8*/ /*9*/

uint8_t digits[] = { 0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f };

void setup()

{

  Serial.begin(115200);

  pinMode(clock, OUTPUT);

  pinMode(data, OUTPUT);

  start();

  writeValue(0x8c);

  stop();

  // clear display

  write(0x00, 0x00, 0x00, 0x00, 0x00, 0x00);

}

void loop()

{

  unsigned int temp = keyscan();

  Serial.println(temp, HEX);

  write(digits[0], digits[2], digits[3], digits[4], digits[5], digits[6]);

}

void write(uint8_t first, uint8_t second, uint8_t third, uint8_t fourth, uint8_t fifth, uint8_t sixth)

{

  start();

  writeValue(0xc0);

  writeValue(first);

  writeValue(second);

  writeValue(third);

  writeValue(fourth);

  writeValue(fifth);

  writeValue(sixth);

  stop();

}

void start(void)

{

  digitalWrite(clock, HIGH); //send start signal to TM1637

  digitalWrite(data, HIGH);

  delayMicroseconds(5);

  digitalWrite(data, LOW);

  digitalWrite(clock, LOW);

  delayMicroseconds(5);

}

void stop(void)

{

  digitalWrite(clock, LOW);

  digitalWrite(data, LOW);

  delayMicroseconds(5);

  digitalWrite(clock, HIGH);

  digitalWrite(data, HIGH);

  delayMicroseconds(5);

}

bool writeValue(uint8_t value)

{

  for (uint8_t i = 0; i < 8; i++)

  {

    digitalWrite(clock, LOW);

    delayMicroseconds(5);

    digitalWrite(data, (value & (1 << i)) >> i);

    delayMicroseconds(5);

    digitalWrite(clock, HIGH);

    delayMicroseconds(5);

  }

  // wait for ACK

  digitalWrite(clock, LOW);

  delayMicroseconds(5);

  pinMode(data, INPUT);

  digitalWrite(clock, HIGH);

  delayMicroseconds(5);

  bool ack = digitalRead(data) == 0;

  pinMode(data, OUTPUT);

  return ack;

}

uint8_t keyscan(void)

{

  uint8_t rekey;

  start();

  writeValue(0x42);

  delayMicroseconds(2);

  pinMode(data, INPUT);

  for (uint8_t i = 0; i < 8; i++)

  {

    digitalWrite(clock, LOW);

    rekey = rekey >> 1;

    digitalWrite(clock, HIGH);

    if (digitalRead(data))

    {

      rekey = rekey | 0x80;

    }

    else

    {

      rekey = rekey | 0x00;

    }

    delayMicroseconds(5);

  }

  pinMode(data, OUTPUT);

  digitalWrite(data, LOW);

  // digitalWrite(clock, LOW);

  // wait for ACK

  digitalWrite(clock, LOW);

  delayMicroseconds(5);

  pinMode(data, INPUT);

  digitalWrite(clock, HIGH);

  delayMicroseconds(5);

  pinMode(data, OUTPUT);

  delayMicroseconds(5);

  stop();

  return rekey;

}

void writeByte(int8_t wr_data)

{

  uint8_t i, count1;

  for (i = 0; i < 8; i++) //sent 8bit data

  {

    digitalWrite(clock, LOW);

    if (wr_data & 0x01)digitalWrite(data, HIGH); //LSB first

    else digitalWrite(data, LOW);

    wr_data >>= 1;

    digitalWrite(clock, HIGH);

  }

  digitalWrite(clock, LOW); //wait for the ACK

  digitalWrite(data, HIGH);

  digitalWrite(clock, HIGH);

  pinMode(data, INPUT);

  while (digitalRead(data))

  {

    count1 += 1;

    if (count1 == 200) //

    {

      pinMode(data, OUTPUT);

      digitalWrite(data, LOW);

      count1 = 0;

    }

    pinMode(data, INPUT);

  }

  pinMode(data, OUTPUT);

}