| 0,0 → 1,115 |
|---|
| // <editor-fold defaultstate="collapsed" desc="Configuration Bits"> |
| // PIC16F1825 Configuration Bit Settings |
| |
| // 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 = 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 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 = ON // Internal/External Switchover (Internal/External Switchover mode is enabled) |
| #pragma config FCMEN = ON // Fail-Safe Clock Monitor Enable (Fail-Safe Clock Monitor is enabled) |
| |
| // 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 = LO // Brown-out Reset Voltage Selection (Brown-out Reset Voltage (Vbor), low trip point selected.) |
| #pragma config LVP = OFF // Low-Voltage Programming Enable (High-voltage on MCLR/VPP must be used for programming) |
| // </editor-fold> |
| |
| #include "defines.h" |
| #include "base_INTERRUPTS.h" |
| #include "base_I2C.h" |
| |
| void Pins_Init(void) { |
| // Set all pins to digital I/O |
| ANSELA = 0x0; |
| ANSELC = 0x0; |
| |
| // Enable weak pull-up if WPU bit is set |
| OPTION_REGbits.nWPUEN = 0; |
| |
| // Set buttons as inputs and enable weak pull-ups |
| BTN_L_N_TRIS = 1; |
| BTN_L_N_WPU = 1; |
| BTN_L_S_TRIS = 1; |
| BTN_L_S_WPU = 1; |
| |
| BTN_R_N_TRIS = 1; |
| BTN_R_N_WPU = 1; |
| BTN_R_E_TRIS = 1; |
| BTN_R_E_WPU = 1; |
| BTN_R_S_TRIS = 1; |
| BTN_R_S_WPU = 1; |
| BTN_R_W_TRIS = 1; |
| BTN_R_W_WPU = 1; |
| |
| // Set leds as outputs and initialize to off |
| LED_1_TRIS = 0; |
| LED_1_LAT = 0; |
| LED_2_TRIS = 0; |
| LED_2_LAT = 0; |
| LED_3_TRIS = 0; |
| LED_3_LAT = 0; |
| LED_4_TRIS = 0; |
| LED_4_LAT = 0; |
| } |
| |
| // Function to read button status into a data structure |
| void Pins_Read(BTN_STATUS *btns) { |
| btns->BTN_L_N = BTN_L_N_PORT; |
| btns->BTN_L_S = BTN_L_S_PORT; |
| |
| btns->BTN_R_N = BTN_R_N_PORT; |
| btns->BTN_R_E = BTN_R_E_PORT; |
| btns->BTN_R_S = BTN_R_S_PORT; |
| btns->BTN_R_W = BTN_R_W_PORT; |
| } |
| |
| // Function to write led values from the data structure |
| void Leds_Write(LED_STATUS *leds) { |
| LED_1_LAT = leds->LED_1; |
| LED_2_LAT = leds->LED_2; |
| LED_3_LAT = leds->LED_3; |
| LED_4_LAT = leds->LED_4; |
| } |
| |
| int main(void) { |
| uint8_t buffer[32]; |
| uint8_t result, length; |
| |
| // Set internal oscillator speed to 32MHz |
| OSCCONbits.SPLLEN = 1; // 4x PLL enable (overwritten by config bits) |
| OSCCONbits.IRCF = 0xE; // Base frequency @ 8MHz |
| OSCCONbits.SCS = 0b00; // System clock determined by config bits |
| |
| // Initialize I/O |
| Pins_Init(); |
| |
| // Initialize I2C in slave mode |
| I2C_DATA i2c_data; |
| I2C_Init(&i2c_data); |
| I2C_Configure_Slave(0x25); |
| |
| // Initialize interrupts |
| Interrupt_Init(); |
| Interrupt_Enable(); |
| |
| // Check for received data over I2C |
| while (1) { |
| do { |
| result = I2C_Get_Status(); |
| } while (!result); |
| length = I2C_Read_Buffer(buffer); |
| if (length == 2 && buffer[0] == CMD_SET_LEDS) { |
| LED_STATUS leds; |
| leds.value = buffer[1]; |
| Leds_Write(&leds); |
| } |
| } |
| } |
| |