0,0 → 1,117 |
// <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 <xc.h> |
#include "defines.h" |
#include "base_INTERRUPTS.h" |
#include "base_I2C.h" |
|
__persistent int temp; |
|
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) { |
char buffer[32]; |
char 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(0x24); |
|
// Initialize interrupts |
Interrupt_Init(); |
Interrupt_Enable(); |
|
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); |
} |
} |
} |
|