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CIS441 Controller
Dependencies: TextLCD mbed-rtos mbed
Fork of PacemakerController by
PacemakerController.cpp.orig
- Committer:
- lucastai
- Date:
- 2015-11-30
- Revision:
- 23:08456978fb78
File content as of revision 23:08456978fb78:
#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_clock; 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 Asense(LED3); DigitalOut Vsense(LED4); DigitalOut apace(p22): DigitalOut vpace(p21): // 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 *argument) { // min hr alarm if( beats < MIN_PM_RT) { lcd.locate(0,1); lcd.printf("!<"); } // max hr alarm if(beats > MAX_PM_RT) { lcd.locate(0,1); lcd.printf("!>"); } } // hw interrupt callback, deal with the keyboard input from PC void keyboard_handler() { // get the char, put it on the PC command line char a = pc.getc(); if (keyboard_needs_numeric) { if (a >= '0' && a <= '9') { // update observation interval obs_int = (a - '0' + 1) * 5; } 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"); beats = 2; // if the char is M, set to manual } else if (a == 'M') { curr_mode = MANUAL; upper_bound = 175; lower_bound = 30; beats = 300; 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 } } void pm_sense() { while(1) { if (timer_count >= VRP) { //wait for Vget; timer_count = 0; // do something with Vsense! } else if (timer_count < VRP) { // wait for Vget } if (timer_count < PVARP) { // wait for Aget? } else if (timer_count >= PVARP) { // wait for Aget? // do something with Asense! } } } void pm_response() { while(1) { if (timer_count >= LRI-AVI) { // PM_A! sets the LED high led_apace = 1; // avi_clk = 0 avi_clk.reset(); apace(); // At Atrial Event State while (avi_clk.read() < AVI); // Ventricular Event timer_count = 0; // PM_V! sets the LED high led_vpace = 1; timer_count = 0; vpace(); } else if (timer_count < LRI - AVI) { // avi_clk = 0 avi_clk.reset(); // wait for Asense? naaah } } } void apace() { apace = 1; led_apace = 1; Thread::wait(10); apace = 0; } void vpace() { vpace = 1; led_vpace = 1; Thread::wait(10); vpace = 0; } int main() { // https://developer.mbed.org/users/chadnach1/code/PacemakerController/ // connect the serial device (PC keybd) to the interrupt pc.attach(&keyboard_handler); // Start LED's Off led_apace = 0; led_vpace = 0; // Start the avi_clock avi_clk.start(); Thread t3(pm_sense); Thread t4(pm_response); Thread t2(PM_ALARM); Thread t5(); }