TM1637을 이용한 4DIGIT FND 구동

** TM1637 모듈 제품 링크 : https://www.devicemart.co.kr/goods/view?no=1326952
** 모듈을 구동하는 함수 CODE : 아래 참조
** TM1637 Datasheet : 첨부 제조사 데이터 쉬트 참조
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#include "main.h"
#include "TM1637.h"

#define cmd_write_data 0x40
#define cmd_disp_on 0x88
#define cmd_disp_off 0x80

void TM1637_Clk_High() { HAL_GPIO_WritePin(FND_CLK_GPIO_Port, FND_CLK_Pin, GPIO_PIN_SET); }
void TM1637_Clk_Low()  { HAL_GPIO_WritePin(FND_CLK_GPIO_Port, FND_CLK_Pin, GPIO_PIN_RESET); }
void TM1637_Dio_High() { HAL_GPIO_WritePin(FND_DIO_GPIO_Port, FND_DIO_Pin, GPIO_PIN_SET); }
void TM1637_Dio_Low() { HAL_GPIO_WritePin(FND_DIO_GPIO_Port, FND_DIO_Pin, GPIO_PIN_RESET); }

uint8_t tick =1;
const char fnd[] = {
    0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, // 0-7
    0x7f, 0x6f, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71, // 8-9, A-F
    0x00
};

const char fnd_wave[] = {
0x40, 0x40, 0x40, 0x40, 0x20,
0x01, 0x01, 0x01, 0x01, 0x04,
0x08, 0x08, 0x08, 0x08
};

void delay_usec(uint16_t usec)
{
volatile uint32_t i,j;
for( i=0; i < usec*2 ; i++ ) {
for( j=0 ; j< 84 ; j++) {
//__asm__ __volatile__("nop\n\t":::"memory");
asm("NOP");
}
}
}

void TM1637_Start()
{
TM1637_Clk_High();
TM1637_Dio_High(); delay_usec(tick);
TM1637_Dio_Low(); delay_usec(tick);
TM1637_Clk_Low(); delay_usec(tick);
}

void TM1637_Send_Byte(uint8_t byte)
{
for( uint8_t i=0 ; i <8 ; i++ ) {
TM1637_Clk_Low(); delay_usec(tick);

if( byte & 0x01 ) {TM1637_Dio_High();}
else TM1637_Dio_Low();

delay_usec(tick);
TM1637_Clk_High();
delay_usec(tick);
byte >>=1;
}
}

void TM1637_Read_Ack()
{
TM1637_Clk_Low();
TM1637_Dio_Low(); delay_usec(tick);
TM1637_Clk_High(); delay_usec(tick);
}

void TM1637_Stop()
{
TM1637_Clk_Low(); delay_usec(tick);
TM1637_Dio_Low(); delay_usec(tick);
TM1637_Clk_High(); delay_usec(tick);
}

void TM1637_bright(uint8_t num)
{
TM1637_Start();
TM1637_Send_Byte(0x87 + num);
TM1637_Read_Ack();
TM1637_Stop();
}

void TM1637_Display_4digit(uint8_t brightness, uint16_t num)
{
uint8_t digit[4], i;
for( i = 0; i < 4 ; i++ ) {
digit[i] = num %10;
num = num/10;
}
// command1 => write data
TM1637_Start();
TM1637_Send_Byte(cmd_write_data);
TM1637_Read_Ack();
TM1637_Stop();

// command2 => address
TM1637_Start();
TM1637_Send_Byte(0xc0);
TM1637_Read_Ack();

// data1...data4
for( i = 0; i < 4 ; i++ ) {
TM1637_Send_Byte( fnd[ digit[3-i] ]);
TM1637_Read_Ack();
}

// command3 => control display
TM1637_Start();
TM1637_Send_Byte( brightness );
TM1637_Read_Ack();
TM1637_Stop();
}

void TM1637_count_down(uint16_t num)
{
for(uint16_t i=0; i< num ; i++) {
TM1637_Display_4digit( 7, i ); HAL_Delay(20);
}
}