![](/media/cache/img/default_profile.jpg.50x50_q85.jpg)
Part of the Pacemaker Project; this models the Pacemaker.
Dependencies: mbed TextLCD mbed-rtos
PacemakerController.cpp
- Committer:
- mhowar
- Date:
- 2015-12-02
- Revision:
- 35:b5e8650a7669
- Parent:
- 34:b4b50ca26e8c
- Child:
- 38:ceabf8f1dfa0
- Child:
- 39:51c4ec84f6fd
- Child:
- 41:d806d68f7969
File content as of revision 35:b5e8650a7669:
#include "mbed.h" #include "LPC17xx.h" #include "TextLCD.h" #include "rtos.h" #include "Thread.h" using namespace rtos; // This is for the pacemaker volatile unsigned short timer_count; Serial pc(USBTX, USBRX); TextLCD lcd(p15, p16, p17, p18, p19, p20, TextLCD::LCD20x4); // rs, e, d4-d7 int keyboard_needs_numeric = 0; // boolean - is in middle of interval input? int h_clock; int pm_clock; Timer avi_clk; Timer t_count; int LRI = 1000; int AVI = 150; int PVARP = 300; int VRP = 200; // constants int MAX_PM_RT = 180; int MIN_PM_RT = 40; enum mode {NORMAL, SLEEP, EXERCISE, MANUAL}; // counters int beats = 0; // state variables int upper_bound = 100; int lower_bound = 40; int obs_int = 10; mode curr_mode = NORMAL; // alarms DigitalOut led_apace(LED1); DigitalOut led_vpace(LED2); DigitalOut led_asense(LED3); DigitalOut led_vsense(LED4); DigitalIn agetSignal(p24); DigitalIn vgetSignal(p23); DigitalOut apaceSignal(p22); DigitalOut vpaceSignal(p21); bool v_sense; bool a_sense; void asense() { a_sense = 1; led_asense = 1; Thread::wait(10); led_asense = 0; a_sense = 0; } void vsense() { v_sense = 1; led_vsense = 1; Thread::wait(10); led_vsense = 0; v_sense = 0; } void apace() { apaceSignal = 1; led_apace = 1; Thread::wait(10); led_apace = 0; apaceSignal = 0; } void vpace() { vpaceSignal = 1; led_vpace = 1; Thread::wait(10); led_vpace = 0; vpaceSignal = 0; } // hardware interrupt handler, adapted from code in piazza post by Dagaen /*extern "C" void TIMER0_IRQHandler (void) { if((LPC_TIM0->IR & 0x01) == 0x01) { // if MR0 interrupt, proceed LPC_TIM0->IR |= 1 << 0; // Clear MR0 interrupt flag timer_count++; //increment timer_count } } */ /*// init the hardware interrupt (timer0), adapted same as above void timer0_init(void) { LPC_SC->PCONP |=1<1; //timer0 power on LPC_SC-> PCLKSEL0 |= 1 << 2; // set timer clock to CCLCK nondivided (1 clock cycle = 1 increment) LPC_TIM0->MR0 = 1000000; //100mhz clock cycle, 1 cycle = 10ns, 10ms = 10 000 000 ns = 1M cycles LPC_TIM0->MCR = 3; //interrupt and reset control //3 = Interrupt & reset timer0 on match (111) sets all three bits NVIC_EnableIRQ(TIMER0_IRQn); //enable timer0 interrupt }*/ void PM_ALARM(void const *args) { while (1) { // min hr alarm if( beats < MIN_PM_RT) { lcd.cls(); lcd.locate(0,1); lcd.printf("!<\n"); } // max hr alarm if(beats > MAX_PM_RT) { lcd.cls(); lcd.locate(0,1); lcd.printf("!>\n"); } } } // hw interrupt callback, deal with the keyboard input from PC void pm_sense(void const *args) { while(1) { /*if (agetSignal == 0) { pc.printf("Aget:LO\n"); } if (vgetSignal == 0) { pc.printf("Vget:LO\n"); } if (agetSignal == 1) { pc.printf("Aget:HI\n"); } if (vgetSignal == 1) { pc.printf("Vget:HI\n"); }*/ if (t_count.read_ms() >= VRP && vgetSignal == 1) { // Valid_V state t_count.reset(); vsense(); } else if (t_count.read_ms() < VRP && vgetSignal == 1) { //pc.printf("invalid v state\n"); // Invalid_V state } if (t_count.read_ms() < PVARP && agetSignal == 1) { // Invalid_A state //pc.printf("invalid a state\n"); } else if (t_count.read_ms() >= PVARP && agetSignal == 1) { // Valid_A state asense(); } } } void pm_response(void const *args) { while(1) { bool goInitalState = 1; if (t_count.read_ms() >= LRI - AVI) { goInitalState = 0; // PM_A! sets the LED high led_apace = 1; avi_clk.reset(); apace(); // At Atrial Event State while (avi_clk.read_ms() < AVI) { if (v_sense == 1) { goInitalState = 1; break; } } if (!goInitalState) { // Ventricular Event t_count.reset(); // PM_V! sets the LED high led_vpace = 1; t_count.reset(); pc.printf("in pmresponse 2"); vpace(); } } else if (t_count.read_ms() < LRI - AVI) { // if Asense, move on to atrial event if (a_sense == 1) { goInitalState = 0; avi_clk.reset(); // At Atrial Event State while (avi_clk.read() < AVI) { if (v_sense == 1) { goInitalState = 1; break; } } // Ventricular Event t_count.reset(); // PM_V! sets the LED high led_vpace = 1; t_count.reset(); vpace(); } } } } int main() { // https://developer.mbed.org/users/chadnach1/code/PacemakerController/ // connect the serial device (PC keybd) to the interrupt // Start LED's Off led_apace = 0; led_vpace = 0; // Start the avi_clock avi_clk.start(); avi_clk.reset(); Thread t1(pm_sense, (void *)""); Thread t2(pm_response, (void *)""); Thread t3(PM_ALARM, (void *)""); t_count.start(); t_count.reset(); while(1) { if (pc.readable()) { char a = pc.getc(); // Handle different keyboard inputs if (keyboard_needs_numeric) { if (a >= '0' && a <= '9') { // update observation interval obs_int = (a - '0' + 1) * 5; keyboard_needs_numeric = 0; } else { pc.printf("Expected numeric key\n"); } } else if(a == 'N') { // if the char is N, update bounds to normal mode curr_mode = NORMAL; upper_bound = 100; lower_bound = 40; pc.printf("MODE IS N\n"); // if the char is S, set bounds to sleep } else if (a == 'S') { curr_mode = SLEEP; upper_bound = 60; lower_bound = 30; pc.printf("MODE IS S\n"); // if the char is E, set bounds to exercise } else if (a == 'E') { curr_mode = EXERCISE; upper_bound = 175; lower_bound = 100; pc.printf("MODE IS E\n"); // if the char is M, set to manual } else if (a == 'M') { curr_mode = MANUAL; upper_bound = 175; lower_bound = 30; pc.printf("MODE IS MANUAL\n"); // check for A if mode is manual } else if (a == 'A') { if(curr_mode == MANUAL) { pc.printf("MODE IS MANUAL GOT APACE\n"); } // check for V is mode is manual } else if (a == 'V') { if(curr_mode == MANUAL) { pc.printf("MODE IS MANUAL GOT VPACE\n"); } } else if (a == 'O') { keyboard_needs_numeric = 1; } else { // do nothing for invalid char } } } }