Discussion :

[cobra38]

Bonjour à Tous

J'aurais besoin de votre éclairage car je n'arrive pas à associer une commande :
externe "C" en ligne 7
à partir du croquis l'auteur utilise les fonctions externes via une partie en assembleur

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;------------------------
; Assembly Code
;------------------------
#define __SFR_OFFSET 0x00
#include "avr/io.h"
;------------------------
.global delay_ms
.global delay_us
;==============================================================
delay_ms:
    LDI   R22, 0xFF
a1: DEC   R22
    NOP
    BRNE  a1
    RET
;===============================================================
delay_us:
    LDI   R21, 55
l2: DEC   R21
    BRNE  l2
    RET

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//---------------------------------------------
//ATtiny85 - DS3231 RTC Read Time, Date & Temp
//---------------------------------------------
#include <TinyWireM.h>

//----------------------
extern "C" {void delay_ms(); void delay_us();}  // <=================================
//---------------------------------------------
byte numeral[] = {0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};
byte read_DS3231[7];
unsigned long millisCapture = millis(), myDelay = 30000;
boolean colon_ONOFF = false;
//===================================================================
void setup()
{
  pinMode(1, OUTPUT);
  TinyWireM.begin();
  TM1637_init();
}
//===================================================================
void loop()
{
  //write to set pointer register to seconds
  //-----------------------------------------
  TinyWireM.beginTransmission(0x68);
  TinyWireM.send(0x00);                 //point to Seconds register
  TinyWireM.endTransmission();
  //----------
  //read time
  //----------
  TinyWireM.requestFrom(0x68, 3);
  if(TinyWireM.available())
  {
    read_DS3231[0] = TinyWireM.receive(); //read seconds
    read_DS3231[1] = TinyWireM.receive(); //read minutes
    read_DS3231[2] = TinyWireM.receive(); //read hours
  }
  delay_ms();
  //--------------------------------------
  //write to set pointer register to date
  //--------------------------------------
  TinyWireM.beginTransmission(0x68);
  TinyWireM.send(0x04);                 //point to Date register
  TinyWireM.endTransmission();
  //----------
  //read date
  //----------
  TinyWireM.requestFrom(0x68, 3);
  if(TinyWireM.available())
  {
    read_DS3231[3] = TinyWireM.receive(); //read day
    read_DS3231[4] = TinyWireM.receive(); //read month
    read_DS3231[5] = TinyWireM.receive(); //read year
  }
  delay_ms();
  //--------------------------------------
  //write to set pointer register to temp
  //--------------------------------------
  TinyWireM.beginTransmission(0x68);
  TinyWireM.send(0x11);                 //point to Temp register
  TinyWireM.endTransmission();
  //----------
  //read temp
  //----------
  TinyWireM.requestFrom(0x68, 1);
  if(TinyWireM.available())
  {
    read_DS3231[6] = TinyWireM.receive(); //read integer part of temp
  }
   delay_ms();
  //----------------------------------------------------------------
  if(millis() - millisCapture > myDelay) disp_date_temp();
  //----------------------------------------------------------------
  if((read_DS3231[2] & 0x10) >> 4 == 0)
  {
    send_byte(0xC0); send_byte(0x00); //turn OFF digit 0
  }
  else disp_digit(0xC0, ((read_DS3231[2] & 0x10) >> 4));
  //----------------------------------------------------------------
  if(colon_ONOFF == true) disp_colon(0xC1, (read_DS3231[2] & 0x0F));
  else disp_digit(0xC1, (read_DS3231[2] & 0x0F));
  //----------------------------------------------------------------
  disp_digit(0xC2, ((read_DS3231[1] & 0xF0) >> 4));
  disp_digit(0xC3, (read_DS3231[1] & 0x0F)); 
  //----------------------------------------------------------------
  byte AM_PM = read_DS3231[2] & 0x20;
  if(AM_PM == 0x20) digitalWrite(1, HIGH);
  else digitalWrite(1, LOW);
  //----------------------------------------------------------------
  delay(2000);
}
//===================================================================
void disp_date_temp()
{
  clr_disp(); delay(500);
  //---------------------------------------------------
  disp_digit(0xC1, (read_DS3231[3] & 0x0F));
  disp_digit(0xC0, ((read_DS3231[3] & 0xF0) >> 4));
  //---------------------------------------------------
  disp_digit(0xC3, (read_DS3231[4] & 0x0F));
  disp_digit(0xC2, ((read_DS3231[4] & 0x10) >> 4));
  //---------------------------------------------------
  delay(2000);
  clr_disp(); delay(500);
  //---------------------------------------------------
  disp_digit(0xC0, 2);
  disp_digit(0xC1, 0);
  disp_digit(0xC3, (read_DS3231[5] & 0x0F));
  disp_digit(0xC2, ((read_DS3231[5] & 0xF0) >> 4));
  //---------------------------------------------------
  delay(2000);
  clr_disp(); delay(500);
  //---------------------------------------------------
  disp_digit(0xC0, (read_DS3231[6]/10));
  disp_digit(0xC1, (read_DS3231[6]%10));
  send_byte(0xC2); send_byte(0x63);
  send_byte(0xC3); send_byte(0x39);
  //---------------------------------------------------
  delay(2000);
  clr_disp(); delay(500);
  //---------------------------------------------------
  millisCapture = millis();
}
//===================================================================
void disp_digit(byte address, byte digit)
{
  switch(digit)
  {
    case 0: send_byte(address); send_byte(numeral[0]); break;
    case 1: send_byte(address); send_byte(numeral[1]); break;
    case 2: send_byte(address); send_byte(numeral[2]); break;
    case 3: send_byte(address); send_byte(numeral[3]); break;
    case 4: send_byte(address); send_byte(numeral[4]); break;
    case 5: send_byte(address); send_byte(numeral[5]); break;
    case 6: send_byte(address); send_byte(numeral[6]); break;
    case 7: send_byte(address); send_byte(numeral[7]); break;
    case 8: send_byte(address); send_byte(numeral[8]); break;
    case 9: send_byte(address); send_byte(numeral[9]);
  }
  colon_ONOFF = !colon_ONOFF;
}
//===================================================================
void disp_colon(byte address1, byte digit1)
{
  switch(digit1)
  {
    case 0: send_byte(address1); send_byte(numeral[0]|0x80); break;
    case 1: send_byte(address1); send_byte(numeral[1]|0x80); break;
    case 2: send_byte(address1); send_byte(numeral[2]|0x80); break;
    case 3: send_byte(address1); send_byte(numeral[3]|0x80); break;
    case 4: send_byte(address1); send_byte(numeral[4]|0x80); break;
    case 5: send_byte(address1); send_byte(numeral[5]|0x80); break;
    case 6: send_byte(address1); send_byte(numeral[6]|0x80); break;
    case 7: send_byte(address1); send_byte(numeral[7]|0x80); break;
    case 8: send_byte(address1); send_byte(numeral[8]|0x80); break;
    case 9: send_byte(address1); send_byte(numeral[9]|0x80);
  }
  send_byte(0xC1); send_byte(0x00);
  colon_ONOFF = !colon_ONOFF;
}
//===================================================================
void TM1637_init()
{
  send_byte(0x8F);        //command for display brightness level (max)
  send_byte(0x44);        //command for single address mode
  clr_disp();             //clear display
}
//===================================================================
void clr_disp()
{
  for(byte i=0; i<=4; i++)
  {
    send_byte(0xC0 + i);
    send_byte(0);
  }
}
//===================================================================
void send_byte(byte Rx_byte)
{
  DDRB |= (1 << PB4);     //PB4 o/p: DIO line
  DDRB |= (1 << PB3);     //PB3 o/p: CLK line
  //----------------------------------------------------------
  PORTB &= ~(1 << PB4);   //START condition
  delay_us();
  PORTB &= ~(1 << PB3);
  delay_us();
  //----------------------------------------------------------
  shiftOut(4, 3, LSBFIRST, Rx_byte); //shift out byte LSB 1st
  //----------------------------------------------------------
  DDRB &= ~(1 << PB4);    //MCU releases DIO line
  delay_us();
  PORTB |= (1 << PB3);    //9th CLK for ACK
  delay_us();
  PORTB &= ~(1 << PB3);
  delay_us();
  DDRB |= (1 << PB4);     //MCU reclaims DIO line
  delay_us();
  //----------------------------------------------------------
  PORTB |= (1 << PB3);    //END condition
  delay_us();
  PORTB |= (1 << PB4);
  delay_us();
}

étant confronté pour la 1ere fois au problème , comment fait-on pour compiler le prg sous IDE svp
merci par avance

pascal

[Jay M]

De mémoire je crois qu’il faut mettre un suffixe .S (avec la majuscule) pour le fichier en assembleur

[cobra38]

Salut Jay M

Ta mémoire ne t'a pas trahie , çà marche
j'avais mis un petit "s"

encore un grand merci
pascal

[Jay M]

Bonne nouvelle!