工作 · 18日 8月 2022

Atmega328PでSWDライター作成(2)

とりあえず、DPのIDCODEとAPのIDRを読み込むところまでやったので、その記録。

スイッチで、どっちを実行するか選択して、実行させる。記録のために全コードを載せる（とりあえず記述はあるけど、まだ使ってない部分も多々ある）。例によって基本的にはコメントなし。

swd_tool_ver0002.ino

#include "voltmeas.h"
#include "sd1602drv.h"
#include "switchdrv.h"

#define pinEXEC (18)

#define EXEC_STATE_NUMBER (4)
#define EXEC_STATE_STANDBY (0)
#define EXEC_STATE_COMPLETE (1)
#define EXEC_STATE_EXECUTING (2)
#define EXEC_STATE_ERROR (3)

#define ERROR_STATE_NUMBER (5)
#define ERROR_STATE_NOERROR (0)
#define ERROR_STATE_VCCLOW (1)
#define ERROR_STATE_IDCODE (2)
#define ERROR_STATE_APIDR (3)
#define ERROR_STATE_OTHER (4)

#define MENU_STATE_NUMBER (2)
#define MENU_STATE_READIDCODE (0)
#define MENU_STATE_READAPIDR (1)

int8_t str_exec_state[EXEC_STATE_NUMBER][17]={
    "STANDBY         ",
    "COMPLETE        ",
    "EXECUTING       ",
    "ERROR           "
};
int8_t str_menu_state[MENU_STATE_NUMBER][17]={
    "1.READ DP-IDCODE",
    "2.READ AP-IDR   "
};

uint8_t menu_state;
uint8_t exec_state;
uint8_t error_state;
uint8_t u8_voltupdate;

uint8_t u8ret;
void setup()
{
    Serial.begin(115200);
    menu_state=0;
    exec_state=0;
    error_state=0;
    pinMode(pinEXEC,OUTPUT);
    digitalWrite(pinEXEC,LOW);
    voltmeas_setup();
    sd1602_setup();
    switch_setup();
    swd_setup();
    u8ret=0xFE;
}
void loop()
{
    uint16_t temp;
    uint32_t u32ret;
    u8_voltupdate=voltmeas_task();
    switch_task();
    if(SW_sel_pressed){
        u8ret=0xFF;
        SW_sel_pressed=0;
        menu_state=menu_state+1;
        if(menu_state==MENU_STATE_NUMBER){
            menu_state=0;
        }
    }
    if(SW_exe_pressed){
        u8ret=0xFF;
        SW_exe_pressed=0;
        digitalWrite(pinEXEC,HIGH);
        u8ret=swd_exec(menu_state,&u32ret);
        digitalWrite(pinEXEC,LOW);
    }
    sprintf(lcdlinebuf[0], "%s", str_menu_state[menu_state]);
    sprintf(lcdlinebuf[1], "%s", str_exec_state[exec_state]);
    if(u8ret==0x00){
        sprintf(lcdlinebuf[1], "%08lX", u32ret);
    }
    temp=(uint16_t)(u16_volt/100);
    sprintf(&(lcdlinebuf[1][12]), "%01u.%01uV",(int)(temp/10),(int)(temp%10));
    sd1602_update();
}

voltmeas.h

#ifndef _VOLTMEAS_H
#define _VOLTMEAS_H
extern uint8_t u8_volt_status;
extern uint16_t u16_volt;
#endif

voltmeas.ino

/*
VTGT --> PC0(A0)
*/
#define pinVTGT (A0)
#define pinVOLTOK (19)
#define VOLTMEAS_CNT (100)
#define VOLT_OK_THRESH (2700)

uint8_t u8_volt_status;
uint16_t u8_volt_meas_exec_counter;
uint16_t u16_volt;
void voltmeas_setup(void){
    pinMode(pinVOLTOK, OUTPUT);
    digitalWrite(pinVOLTOK, LOW);
    analogReference(DEFAULT);
    u8_volt_meas_exec_counter=0;
    u8_volt_status=false;
}
uint8_t voltmeas_task(void){
    uint32_t u32_volt;
    uint8_t ret;
    ret=false;
    if(u8_volt_meas_exec_counter==0){
        digitalWrite(pinVOLTOK, HIGH);
        ret=true;
        u32_volt=(uint32_t)(analogRead(pinVTGT))*5000/1024;
        u16_volt=(uint16_t)u32_volt;
        digitalWrite(pinVOLTOK, LOW);
        if(u16_voltVOLTMEAS_CNT){
        u8_volt_meas_exec_counter=0;
    }
    return ret;
}

sd1602drv.h

#ifndef _SD1602DRV_H
#define _SD1602DRV_H
extern char lcdlinebuf[2][17];
#endif

sd1602drv.ino

/*
 * LCD RS pin to PC3 digital pin 17
 * LCD Enable pin to PC2 digital pin 16
 * LCD D4 pin to PD4 digital pin 4
 * LCD D5 pin to PD5 digital pin 5
 * LCD D6 pin to PD6 digital pin 6
 * LCD D7 pin to PD7 digital pin 7
 * LCD R/W pin to PC1 pin 15
 * LCD VSS pin to ground
 * LCD VCC pin to 5V
 * 10K resistor:
 * ends to +5V and ground
 * wiper to LCD VO pin (pin 3)
 */
#define pinRS (17)
#define pinE (16)
#define pinRW (15)
#define pinD4 (4)
#define pinD5 (5)
#define pinD6 (6)
#define pinD7 (7)

#include 

LiquidCrystal lcd(pinRS, pinE, pinD4, pinD5, pinD6, pinD7);
char lcdlinebuf[2][17];

void sd1602_setup()
{
    pinMode(pinRW, OUTPUT);
    digitalWrite(pinRW, LOW);
    lcd.begin(16, 2);
}
void sd1602_update()
{
    lcd.setCursor(0, 0);
    lcd.print(lcdlinebuf[0]);
    lcd.setCursor(0, 1);
    lcd.print(lcdlinebuf[1]);
}

switchdrv.h

#ifndef _SWITCHDRV_H
#define _SWITCHDRV_H
extern uint8_t SW_exe_pressed;
extern uint8_t SW_sel_pressed;
#endif

switchdrv.ino

#define pinINT0 (2)
#define pinINT1 (3)

#define count_max (4)

uint8_t SW_exe_pressed;
uint8_t SW_sel_pressed;

uint8_t exe_press_count;
uint8_t sel_press_count;

void switch_setup(void){
    pinMode(pinINT0,INPUT_PULLUP);
    pinMode(pinINT1,INPUT_PULLUP);
    SW_exe_pressed=0;
    SW_sel_pressed=0;
    exe_press_count=0;
    sel_press_count=0;
}

void switch_task(void){
    int stInt0,stInt1;
    stInt0=digitalRead(pinINT0);
    stInt1=digitalRead(pinINT1);

    if(stInt1==LOW){
        if(sel_press_count=count_max){
                SW_sel_pressed=1;
            }
        }
    }else{
        sel_press_count=0;
    }

    if(stInt0==LOW){
        if(exe_press_count=count_max){
                SW_exe_pressed=1;
            }
        }
    }else{
        exe_press_count=0;
    }
}

swddrv.ino(どうしても正しく表示できないので、pdf化して貼っておく)