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Code Examples

MotooTanaka
Esteemed Contributor

IMG_4132.JPG

So yesterday I encountered another chance to write a sample program for a Matrix Keypad.

Data entry from keyboard to PSOC

昨日、再びマトリクスキーパッドのサンプルを書く機会に恵まれました。

Although I'm quite sure that I have written PSoC program(s) using Matrix Keypad I could not find any in my PC. orz

So here is a yet another newly written sample of 4x4 Matrix Keypad for CY8CKIT-059.

確か、一度ならず書いていたはずなのですが例によって見つかりません。 orz

という訳で懲りずに再び CY8CKIT-059 用に書いてみました。

I hope that next time I need this, I will be find it here...

次に必要になったときには、ここで見つけられることを期待しつつ...

schematic

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pins

033-pins.JPG

Tera Term log

031-TeraTerm-keymatrix-5.JPG

main.c

========================

#include "project.h"

#include "stdio.h"

#define NUM_ROW 4

#define NUM_COL 4

volatile uint8_t key[NUM_ROW][NUM_COL] = { 0u } ;

uint8_t letter[NUM_ROW][NUM_COL] = {

    { '1', '2', '3', 'A' },

    { '4', '5', '6', 'B' },

    { '7', '8', '9', 'C' },

    { '*', '0', '#', 'D' }

} ;

   

volatile int row_no = 0 ;

volatile int col_no = 0 ;

void scan_key_matrix(void)

{

    switch(row_no) {

    case  0: ROW0_Write(1) ; ROW1_Write(0) ; ROW2_Write(0) ; ROW3_Write(0) ; break ;

    case  1: ROW0_Write(0) ; ROW1_Write(1) ; ROW2_Write(0) ; ROW3_Write(0) ; break ;

    case  2: ROW0_Write(0) ; ROW1_Write(0) ; ROW2_Write(1) ; ROW3_Write(0) ; break ;

    case  3: ROW0_Write(0) ; ROW1_Write(0) ; ROW2_Write(0) ; ROW3_Write(1) ; break ;

    default: ROW0_Write(0) ; ROW1_Write(0) ; ROW2_Write(0) ; ROW3_Write(0) ; break ;

    }

    switch(col_no) {

    case 0: key[row_no][col_no] = COL0_Read() ; break ;

    case 1: key[row_no][col_no] = COL1_Read() ; break ;

    case 2: key[row_no][col_no] = COL2_Read() ; break ;

    case 3: key[row_no][col_no] = COL3_Read() ; break ;

    }

   

    col_no++ ;

    if (col_no >= NUM_COL) {

        col_no = 0 ;

        row_no = (row_no + 1) % NUM_ROW ;

    }

    ROW0_Write(0) ;

    ROW1_Write(0) ;

    ROW2_Write(0) ;

    ROW3_Write(0) ;

}

CY_ISR(my_tick_isr)

{

    scan_key_matrix() ;

}

#define STR_LEN 64

char str[STR_LEN+1] ;

void print(char *str)

{

    UART_PutString(str) ;

}

void printc(char c)

{

    UART_PutChar(c) ;

}

void cls(void)

{

    print("\033c") ; /* reset */

    CyDelay(20) ;

    print("\033[2J") ; /* clear screen */

    CyDelay(20) ;

}

void splash(void)

{

    cls() ;

    print("5LP 4x4 Matrix Key Test") ;

    snprintf(str, STR_LEN, "(%s %s)\n", __DATE__, __TIME__) ;

    print(str) ;

}

void init_hardware(void)

{

    CyGlobalIntEnable; /* Enable global interrupts. */

    UART_Start() ;

    splash() ;

    CySysTickStart() ;

    CySysTickSetCallback(0, my_tick_isr) ;

}

void dump_key_matrix(void)

{

    int col, row ;

    for (row = 0 ; row < NUM_ROW ; row++) {

        for (col = 0 ; col < NUM_COL ; col++) {

            if (key[row][col]) {

                snprintf(str, STR_LEN, "%c ", letter[row][col]) ;

                print(str) ;

            } else {

                print("- ") ;

            }

        }

        print("\n\r") ;

    }  

}

int main(void)

{

    init_hardware() ;

    for(;;)

    {

        cls() ;

        dump_key_matrix() ;

        CyDelay(1000) ;

    }

}

========================

And I also compiled the project for CY8CKIT-044

おまけに CY8CKIT-044 でも動かしておきました。

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In the main.c, the only difference were

重箱の角ですが、 059版との差は

> UART_PutString(str)

< UART_UartPutString(str)

>     print("5LP 4x4 Matrix Key Test") ;

<     print("PSoC 4 4x4 Matrix Key Test") ;

moto

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