PIC12F1822でDACをやってみた。 DACをやるのがはじめてなんてちょっと自分でもびっくりだ。 何で今までやらなかったんだろう。
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#include <xc.h> // CONFIG1 #pragma config FOSC = INTOSC // Oscillator Selection (INTOSC oscillator: I/O function on CLKIN pin) #pragma config WDTE = OFF // Watchdog Timer Enable (WDT disabled) #pragma config PWRTE = ON // Power-up Timer Enable (PWRT enabled) #pragma config MCLRE = OFF // MCLR Pin Function Select (MCLR/VPP pin function is digital input) #pragma config CP = OFF // Flash Program Memory Code Protection (Program memory code protection is disabled) #pragma config CPD = OFF // Data Memory Code Protection (Data memory code protection is disabled) #pragma config BOREN = ON // Brown-out Reset Enable (Brown-out Reset enabled) #pragma config CLKOUTEN = OFF // Clock Out Enable (CLKOUT function is disabled. I/O or oscillator function on the CLKOUT pin) #pragma config IESO = OFF // Internal/External Switchover (Internal/External Switchover mode is disabled) #pragma config FCMEN = OFF // Fail-Safe Clock Monitor Enable (Fail-Safe Clock Monitor is disabled) // CONFIG2 #pragma config WRT = OFF // Flash Memory Self-Write Protection (Write protection off) #pragma config PLLEN = ON // PLL Enable (4x PLL enabled) #pragma config STVREN = ON // Stack Overflow/Underflow Reset Enable (Stack Overflow or Underflow will cause a Reset) #pragma config BORV = HI // Brown-out Reset Voltage Selection (Brown-out Reset Voltage (Vbor), high trip point selected.) #pragma config LVP = OFF // Low-Voltage Programming Enable (High-voltage on MCLR/VPP must be used for programming) void main(){ unsigned char dacvalue; OSCCON = 0b01110010; ANSELA = 0b00000000; TRISA = 0b00000000; PORTA = 0b00000000; DACCON0bits.DACEN = 1;//DAC is Enabled DACCON0bits.DACLPS = 1;//DAC Positive reference source selected DACCON0bits.DACOE = 1;//DAC voltage level is also an output on the DACOUT pin while(1) { for(dacvalue=0; dacvalue<32; dacvalue++){ DACCON1 = dacvalue; } for(dacvalue=31; dacvalue>0; dacvalue--){ DACCON1 = dacvalue; } } } |
出力を見てみると
