/* * File: main.c * Author: boos * * Created on May 16, 2021, 10:27 PM */ // CONFIG1 #pragma config FOSC = INTOSC // Oscillator Selection Bits (INTOSC oscillator: I/O function on CLKIN pin) #pragma config WDTE = OFF // Watchdog Timer Enable (WDT disabled) #pragma config PWRTE = OFF // Power-up Timer Enable (PWRT disabled) #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 BOREN = OFF // Brown-out Reset Enable (Brown-out Reset disabled) #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 Mode (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 CPUDIV = NOCLKDIV// CPU System Clock Selection Bit (NO CPU system divide) #pragma config USBLSCLK = 48MHz // USB Low Speed Clock Selection bit (System clock expects 48 MHz, FS/LS USB CLKENs divide-by is set to 8.) #pragma config PLLMULT = 3x // PLL Multipler Selection Bit (3x Output Frequency Selected) #pragma config PLLEN = ENABLED // PLL Enable Bit (3x or 4x PLL Enabled) #pragma config STVREN = OFF // Stack Overflow/Underflow Reset Enable (Stack Overflow or Underflow will not cause a Reset) #pragma config BORV = LO // Brown-out Reset Voltage Selection (Brown-out Reset Voltage (Vbor), low trip point selected.) #pragma config LPBOR = OFF // Low-Power Brown Out Reset (Low-Power BOR is disabled) #pragma config LVP = OFF // Low-Voltage Programming Enable (Low-voltage programming disabled) #include // location of the LED, DATA output, and pushbutton #define LED RC2 #define DATA RC3 #define SW1 !RA5 // frequency is 48MHz // (need this so that __delay_ms() works properly) #define _XTAL_FREQ 48000000 // macro to send the bit 'b' (can be either 0 or 1) #define send(b) DATA=1; NOP(); NOP(); NOP(); DATA=b; NOP(); NOP(); NOP(); NOP(); DATA=0; NOP(); NOP(); NOP(); NOP(); // auxiliary functions to control the WS2812 NeoPixel LEDs void sendByte (unsigned char b); void sendRGB (unsigned char r, unsigned char g, unsigned char b); // main function void main (void) { // set up internal oscillator to run at 48 MHz // set the SCS settings (system clock select) // to use the frequency specified in configuration word (line 9) SCS0 = 0; SCS1 = 0; // set to 16 MHz configuration IRCF0 = 1; IRCF1 = 1; IRCF2 = 1; IRCF3 = 1; // enable PLL to result in 48MHz // (PLL is set to 3x in line 23) SPLLEN = 1; // set up peripherals // LED is an output TRISC2 = 0; // DATA is an output TRISC3 = 0; // turn off analog to digital converter ANSC2 = 0; ANSC3 = 0; // button input TRISA5 = 1; WPUA5 = 1; nWPUEN = 0; // declare variables used for animation unsigned char brt = 1, dir = 1; int timebase = 0, stage = 0; // main loop while (1) { // react to button press if (SW1) { LED = 1; brt += dir; if (brt >= 255) { dir = -1; } else if (brt == 0) { dir = 1; } } else { LED = 0; } // time the animation timebase++; if (timebase > 300) { timebase = 0; stage += 1; if (stage >= 8) { stage = 0; } } // send out animation pattern if (stage == 0) { sendRGB(0,0,0); sendRGB(0,0,0); sendRGB(0,0,0); sendRGB(0,0,0); sendRGB(brt,0,0); sendRGB(0,brt,0);sendRGB(0,0,brt); sendRGB(brt,brt,0); sendRGB(brt,0,brt); sendRGB(0,brt,brt); sendRGB(brt,brt,brt); } else if (stage == 1) { sendRGB(brt,0,0); sendRGB(brt,0,0); sendRGB(brt,0,0); sendRGB(brt,brt,brt); sendRGB(0,0,0); sendRGB(brt,0,0); sendRGB(0,brt,0);sendRGB(0,0,brt); sendRGB(brt,brt,0); sendRGB(brt,0,brt); sendRGB(0,brt,brt); } else if (stage == 2) { sendRGB(0,brt,0); sendRGB(0,brt,0); sendRGB(0,brt,0); sendRGB(0,brt,brt); sendRGB(brt,brt,brt); sendRGB(0,0,0); sendRGB(brt,0,0); sendRGB(0,brt,0);sendRGB(0,0,brt); sendRGB(brt,brt,0); sendRGB(brt,0,brt); } else if (stage == 3) { sendRGB(0,0,brt); sendRGB(0,0,brt); sendRGB(0,0,brt); sendRGB(brt,0,brt); sendRGB(0,brt,brt); sendRGB(brt,brt,brt); sendRGB(0,0,0); sendRGB(brt,0,0); sendRGB(0,brt,0);sendRGB(0,0,brt); sendRGB(brt,brt,0); } else if (stage == 4) { sendRGB(brt,brt,0); sendRGB(brt,brt,0); sendRGB(brt,brt,0); sendRGB(brt,brt,0); sendRGB(brt,0,brt); sendRGB(0,brt,brt); sendRGB(brt,brt,brt); sendRGB(0,0,0); sendRGB(brt,0,0); sendRGB(0,brt,0); sendRGB(0,0,brt); } else if (stage == 5) { sendRGB(brt,0,brt); sendRGB(brt,0,brt); sendRGB(brt,0,brt); sendRGB(0,0,brt); sendRGB(brt,brt,0); sendRGB(brt,0,brt); sendRGB(0,brt,brt); sendRGB(brt,brt,brt); sendRGB(0,0,0); sendRGB(brt,0,0); sendRGB(0,brt,0); } else if (stage == 6) { sendRGB(0,brt,brt); sendRGB(0,brt,brt); sendRGB(0,brt,brt); sendRGB(0,brt,0); sendRGB(0,0,brt); sendRGB(brt,brt,0); sendRGB(brt,0,brt); sendRGB(0,brt,brt); sendRGB(brt,brt,brt); sendRGB(0,0,0); sendRGB(brt,0,0); } else if (stage == 7) { sendRGB(brt,brt,brt); sendRGB(brt,brt,brt); sendRGB(brt,brt,brt); sendRGB(brt,0,0); sendRGB(0,brt,0); sendRGB(0,0,brt); sendRGB(brt,brt,0); sendRGB(brt,0,brt); sendRGB(0,brt,brt); sendRGB(brt,brt,brt); sendRGB(0,0,0); } // wait some time __delay_ms(1); } return; } // send out a byte b in WS2812 protocol void sendByte (unsigned char b) { if (b & 0b10000000) { send(1); } else { send(0); } if (b & 0b01000000) { send(1); } else { send(0); } if (b & 0b00100000) { send(1); } else { send(0); } if (b & 0b00010000) { send(1); } else { send(0); } if (b & 0b00001000) { send(1); } else { send(0); } if (b & 0b00000100) { send(1); } else { send(0); } if (b & 0b00000010) { send(1); } else { send(0); } if (b & 0b00000001) { send(1); } else { send(0); } } // send red, green, and blue values in WS2812 protocol void sendRGB (unsigned char r, unsigned char g, unsigned char b) { sendByte(g); sendByte(r); sendByte(b); }