Bonjour,
j'essais de mettre en route un capteur de température en I2C avec un PIC18F45K22 (XC8, MPLAB V3.26) , mais je n'arrive pas à mesurer la température, sachant que simule le systeme sous Proteus.
j'ai essayé une fonction pour detecter la présence du capteur sur le bus I2C, le capteur est bien présent mais la valeur mesurée est (-1634..) et ne change pas quand je chage la température du capteur. Pourrez-vous m'aider à trouver la boulette svp ? Merci D'avance.
voici mon code
Code:#include <pic18f45k22.h> #include <xc.h> #include"DS1631CHEK.h" // CONFIG1H #pragma config FOSC = HSMP // Oscillator Selection bits (HS oscillator (medium power 4-16 MHz)) #pragma config PLLCFG = OFF // 4X PLL Enable (Oscillator used directly) #pragma config PRICLKEN = ON // Primary clock enable bit (Primary clock is always enabled) #pragma config FCMEN = OFF // Fail-Safe Clock Monitor Enable bit (Fail-Safe Clock Monitor disabled) #pragma config IESO = OFF // Internal/External Oscillator Switchover bit (Oscillator Switchover mode disabled) // CONFIG2L #pragma config PWRTEN = OFF // Power-up Timer Enable bit (Power up timer disabled) #pragma config BOREN = SBORDIS // Brown-out Reset Enable bits (Brown-out Reset enabled in hardware only (SBOREN is disabled)) #pragma config BORV = 190 // Brown Out Reset Voltage bits (VBOR set to 1.90 V nominal) // CONFIG2H #pragma config WDTEN = ON // Watchdog Timer Enable bits (WDT is always enabled. SWDTEN bit has no effect) #pragma config WDTPS = 32768 // Watchdog Timer Postscale Select bits (1:32768) // CONFIG3H #pragma config CCP2MX = PORTC1 // CCP2 MUX bit (CCP2 input/output is multiplexed with RC1) #pragma config PBADEN = OFF // PORTB A/D Enable bit (PORTB<5:0> pins are configured as analog input channels on Reset) #pragma config CCP3MX = PORTB5 // P3A/CCP3 Mux bit (P3A/CCP3 input/output is multiplexed with RB5) #pragma config HFOFST = ON // HFINTOSC Fast Start-up (HFINTOSC output and ready status are not delayed by the oscillator stable status) #pragma config T3CMX = PORTC0 // Timer3 Clock input mux bit (T3CKI is on RC0) #pragma config P2BMX = PORTD2 // ECCP2 B output mux bit (P2B is on RD2) #pragma config MCLRE = EXTMCLR // MCLR Pin Enable bit (MCLR pin enabled, RE3 input pin disabled) // CONFIG4L #pragma config STVREN = ON // Stack Full/Underflow Reset Enable bit (Stack full/underflow will cause Reset) #pragma config LVP = ON // Single-Supply ICSP Enable bit (Single-Supply ICSP enabled if MCLRE is also 1) #pragma config XINST = OFF // Extended Instruction Set Enable bit (Instruction set extension and Indexed Addressing mode disabled (Legacy mode)) // CONFIG5L #pragma config CP0 = OFF // Code Protection Block 0 (Block 0 (000800-001FFFh) not code-protected) #pragma config CP1 = OFF // Code Protection Block 1 (Block 1 (002000-003FFFh) not code-protected) #pragma config CP2 = OFF // Code Protection Block 2 (Block 2 (004000-005FFFh) not code-protected) #pragma config CP3 = OFF // Code Protection Block 3 (Block 3 (006000-007FFFh) not code-protected) // CONFIG5H #pragma config CPB = OFF // Boot Block Code Protection bit (Boot block (000000-0007FFh) not code-protected) #pragma config CPD = OFF // Data EEPROM Code Protection bit (Data EEPROM not code-protected) // CONFIG6L #pragma config WRT0 = OFF // Write Protection Block 0 (Block 0 (000800-001FFFh) not write-protected) #pragma config WRT1 = OFF // Write Protection Block 1 (Block 1 (002000-003FFFh) not write-protected) #pragma config WRT2 = OFF // Write Protection Block 2 (Block 2 (004000-005FFFh) not write-protected) #pragma config WRT3 = OFF // Write Protection Block 3 (Block 3 (006000-007FFFh) not write-protected) // CONFIG6H #pragma config WRTC = OFF // Configuration Register Write Protection bit (Configuration registers (300000-3000FFh) not write-protected) #pragma config WRTB = OFF // Boot Block Write Protection bit (Boot Block (000000-0007FFh) not write-protected) #pragma config WRTD = OFF // Data EEPROM Write Protection bit (Data EEPROM not write-protected) // CONFIG7L #pragma config EBTR0 = OFF // Table Read Protection Block 0 (Block 0 (000800-001FFFh) not protected from table reads executed in other blocks) #pragma config EBTR1 = OFF // Table Read Protection Block 1 (Block 1 (002000-003FFFh) not protected from table reads executed in other blocks) #pragma config EBTR2 = OFF // Table Read Protection Block 2 (Block 2 (004000-005FFFh) not protected from table reads executed in other blocks) #pragma config EBTR3 = OFF // Table Read Protection Block 3 (Block 3 (006000-007FFFh) not protected from table reads executed in other blocks) // CONFIG7H #pragma config EBTRB = OFF // Boot Block Table Read Protection bit (Boot Block (000000-0007FFh) not protected from table reads executed in other blocks) void i2c_Init(void){ // Initialise I2C MSSP // Master 100KHz TRISDbits.TRISD0=1; // set SCL and SDA pins as inputs TRISDbits.TRISD1=1; OpenI2C2(MASTER, SLEW_OFF); // Initialize I2C module SSP2ADD=0x13; // 100khz = 8Mhz / ( ( 0x13+1) * 4 ) } void temp_config( char data) { StartI2C2(); WriteI2C2(0x90); WriteI2C2(0xAC); WriteI2C2(data); IdleI2C2(); StopI2C2(); } void init_temp(){ PORTDbits.RD0=1; PORTDbits.RD1=1; StartI2C2(); WriteI2C2(0x90); WriteI2C2(0x51); StopI2C2(); temp_config(0xc); } signed int read_int_temp(char Address){ signed int datah, datal; signed long data; StartI2C2(); WriteI2C2(Address); WriteI2C2(0xAA); StartI2C2(); WriteI2C2(0x91); datah=ReadI2C2(); //datal=ReadI2C2(); IdleI2C2(); StopI2C2(); data=(signed long)datah*100; data=data+(((datal >> 4 )*(long)50)/16); data=data*9; data = (data / 5) + 3200; return(data); /*if(datah>=0x80) datah = datah - 256;//if sign bit is set, then temp is negative return(datah);*/ } unsigned char Init_DS1631(unsigned char dev_address) // Returns 0xff on error , 0 on success { unsigned char Idata=0xc; // Config=12bit / 1shot OpenI2C2(MASTER, SLEW_OFF); // Initialize I2C module SSP2ADD=19; // 100khz = 8Mhz / ( ( 0x13+1) * 4 ) IdleI2C2(); StartI2C2(); // Generate I2C2 start condition IdleI2C2(); if(WriteI2C2(dev_address)!=0) // { StopI2C2(); CloseI2C2(); return 0xff; // Error :no reaction from sensor } else { IdleI2C2(); WriteI2C2(0xAC); // Send config command IdleI2C2(); WriteI2C2(Idata); // Send our configuration IdleI2C2(); StopI2C2(); return 0; // All went well } } void main(void) { float test; ANSELD=0; OSCCONbits.IRCF =0b110; OSCCONbits.SCS =0b01; // OSCTUNEbits.PLLEN =0b1;} i2c_Init(); while(1) { init_temp(); test=read_int_temp(0x90); // test= Init_DS1631(0x90); } }
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, donc tu ne suis pas ce que je t'ai dit...
surtout quand on débute.
