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200 Kevin 1 
#include "defines.h"
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#include "BTN.h"
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201 Kevin 4 
static BTN_DATA *btn_data_ptr;
200 Kevin 5 
 
201 Kevin 6 
void BTN_Init(BTN_DATA *data, void (*callback_1)(void), void (*callback_2)(void), void (*callback_3)(void)) {
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    btn_data_ptr = data;
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    btn_data_ptr->callback_function_1 = callback_1;
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    btn_data_ptr->callback_function_2 = callback_2;
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    btn_data_ptr->callback_function_3 = callback_3;
200 Kevin 12 
 
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    BTN1_TRIS = 1;
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    BTN2_TRIS = 1;
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    BTN3_TRIS = 1;
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    INTDisableInterrupts();
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    CNCONSET = 0x8000;  // Turn on change notice interrupt
212 Kevin 20 
#if defined CEREBOT_32MX7
200 Kevin 21 
    CNENSET = 0x80300;  // Set interrupt on CN8/9/19
212 Kevin 22 
#elif defined CEREBOT_MX7CK
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    CNENSET = 0x00300;  // Set interrupt on CN8/9
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#endif
231 Kevin 25 
    int32_t tmp = BTN1_PORT;
200 Kevin 26 
    tmp = BTN2_PORT;
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    tmp = BTN3_PORT;
212 Kevin 28 
    IPC6SET = 0xD0000;  // Set priority level = 3, sub-priority level = 1
200 Kevin 29 
    IFS1CLR = 0x1;      // Clear interrupt flag
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    IEC1SET = 0x1;      // Enable interrupt
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    INTEnableInterrupts();
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}
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212 Kevin 35 
void __ISR(_CHANGE_NOTICE_VECTOR, ipl3) __CN_Interrupt_Handler(void) {
201 Kevin 36 
    // Upon interrupt, debounce input and call saved function
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    if (BTN1_PORT == 1) {
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        Delay_MS(BTN_DEBOUNCE_MS);
200 Kevin 39 
        if (BTN1_PORT == 1) {
201 Kevin 40 
            if (btn_data_ptr->callback_function_1 != NULL)
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                (*btn_data_ptr->callback_function_1)();
200 Kevin 42 
        }
201 Kevin 43 
    }
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    if (BTN2_PORT == 1) {
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        Delay_MS(BTN_DEBOUNCE_MS);
200 Kevin 46 
        if (BTN2_PORT == 1) {
201 Kevin 47 
            if (btn_data_ptr->callback_function_2 != NULL)
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                (*btn_data_ptr->callback_function_2)();
200 Kevin 49 
        }
201 Kevin 50 
    }
212 Kevin 51 
#ifdef CEREBOT_32MX7
201 Kevin 52 
    if (BTN3_PORT == 1) {
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        Delay_MS(BTN_DEBOUNCE_MS);
200 Kevin 54 
        if (BTN3_PORT == 1) {
201 Kevin 55 
            if (btn_data_ptr->callback_function_3 != NULL)
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                (*btn_data_ptr->callback_function_3)();
200 Kevin 57 
        }
201 Kevin 58 
    }
212 Kevin 59 
#endif
200 Kevin 60 
    IFS1CLR = 0x1; // Clear interrupt flag
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}