"writing in c++ create square wave in assembly microprocessor. anyway, layout follows:
#include <iostream> #include <fstream> #include <string> using namespace std; void code_calc(float cyc, float cyc_high, float cyc_low, string prt, string pncnf, string pnhgh, char prtlttr) { ofstream outfile("sqrwv.txt"); if (outfile.is_open()) { cout << "\n\nwriting file...\n\n"<<prt<<pncnf<<cyc_low; outfile << "sqrwv movlw 0x02 ; crude count variable\n" << " movwf count4 ; store in count4 generate wait of 0.5s\n" << " bsf status, rp0 ;\n" << " bcf status, rp1 ; select bank 1\n" << " movlw b'"<<pncnf<<"' ; write / output on pin 1\n" << " movwf tris"<<prtlttr<< " ; portb now(wwww wwww)\n" << "sqhigh bcf status, rp0 ;\n" << " bcf status, rp1 ; select bank 0\n" << " bsf "<<prt<<", "<<pnhgh<<" ; set pin 1 of port b high\n" << " call delay ; wait 0.1s\n" << " decfsz count4, 1 ; decrement count4 generate\n" << " goto sqhigh ; flat high signal of 0.5s\n" << " movlw 0x02 ; crude count variable again\n" << " movwf count5 ; \n" << "sqlow nop ; nop ensure correct cycles on high , low\n" << " nop ; mirroring bcfs in high\n" << " bcf "<<prt<<", "<<pnhgh<<" ; set pin 1 of port b low\n" << " nop ;\n" << " nop ;\n" << " nop ; 93 cycles low\n" << " call delay ; wait 0.1s\n" << " decfsz count5, 1 ; decrement count4 generate flat low signal\n" << " goto sqlow ; repeat 4 more times, giving 0.5s\n" << " goto sqrwv ; if count4 zero, go high - forever 83 counts\n"; outfile.close(); } else cout << "couldn't open file. try again."; } // outputs menu text when called void menu_bs() { cout << " ::::::::::::::::::::::::::::::::::::::::::\n" << " :: square wave generator assembly ::\n" // initiate menu << " ::::::::::::::::::::::::::::::::::::::::::\n\n" << "follow instructions in list, " << "and check output in sqrwv.txt\n\n" << "1. important information\n" << "2. enter clock speed\n" // give user various options << "3. enter wave period\n" << "4. or enter wave frequency\n" << "5. configure port , pins\n" << "6. enter duty cycle\n" << "7. generate code\n" << "8. exit\n\n" // allow user exit using << "choice: \n"; } void menu() { while (1) { system("cls"); char select[1]; // use menu select variable menu_bs(); unsigned long long int speed; float time; float cycle; float cycle_high; float cycle_low; float period; float frequency; float duty; char portletter; string port; string pinconf; string pinhigh; cin >> select; if (select[0] == '1') { system("cls"); cin.ignore(); cout << "there few things should note: \n" << "- designed use p16f877a\n" << "- can enter delay time of 3.4e +/- 38\n" << "- cycle counts <=1277, need reserve count1\n" << "- cycle counts <=261125, need reserve both count1 , count2\n" << "- cycle counts <=62620865, need reserve count1, count2 , count3\n" << "- upper cycle limit code created 62620861 cycles\n" << " - give delay of 62 seconds on 1mhz clock\n"; system("pause"); system("cls"); } if (select[0] == '2') { system("cls"); cout << "your clock speed\n\n"; cout << "enter clock speed in integer form: e.g. 5000000\n\n"; cin >> speed; cout << "\n\nyou chose " << speed << "\n\n"; system("pause"); system("cls"); } else if (select[0] == '3') { system("cls"); cout << "your wave period\n\n"; cout << "enter wave period in decimal form or integer: 3.5\n\n"; cin >> time; cout << "\n\n"; cycle = time * speed; cout << "\n\nyou chose period of " << time << "s\n\n"; cout << "this corresponds " << cycle << " cycles 1 period.\n\n"; system("pause"); system("cls"); } else if (select[0] == '4') { system("cls"); cout << "your wave frequency\n\n"; cout << "enter wave frequency in decmial form or integer: 0.2\n\n"; cin >> time; cout << "\n\n"; cycle = speed / time; cout << "\n\nyou chose frequency of " << time << "hz\n\n"; cout << "this corresponds " << cycle << " cycles frequency\n\n"; system("pause"); system("cls"); } else if (select[0] == '5') { system("cls"); cout << "your port configuration\n\n"; cout << "enter 1 port you'd mess with: e.g. porta, portb, portc\n\n"; cin.ignore(); getline(cin, port); cout << "\n\n"; cout << "now enter write read configuration of pins on port: \n e.g. 00000000 = write all, 00001111 = write four, read 4\n\n"; getline(cin, pinconf); cout << "\n\n"; cout << "now enter pin you'd toggle high/low: e.g. 1-7\n\n"; getline(cin, pinhigh); pinhigh = pinhigh; portletter = port.at(4); if (pinconf.length() == 8 && port.length() == 5) { cout << "\n\nyou're configured to: " << port << "(" << pinconf << ")\n\n"; cout << "you'll using tris" << port.at(4) << " register , toggling pin " << pinhigh<<endl<<endl; } else cout << "\n\nyour port should 5 characters long , pin \nconfiguration should 8 characters because have \neight pins. try again.\n\n"; system("pause"); system("cls"); } else if (select[0] == '6') { system("cls"); cout << "your wave duty cycle\n\n"; cout << "enter duty cycle decmial (not percentage): e.g. 50% duty cycle = 0.5\n\n"; cin >> duty; cout << "\n\n"; if (duty >= 1 || duty <= 0) { cout << "\n\nyou can't have duty cycle greater or less 100% or 0% respectively.\n\n"; system("pause"); system("cls"); } else { cycle_high = cycle * duty; cycle_low = cycle * (1 - duty); cout << "\n\nyou chose duty cycle of " << duty * 100 << "%\n\n"; cout << "this corresponds " << cycle_high << " cycles logic high.\n"; cout << "this corresponds " << cycle_low << " cycles logic low.\n\n"; system("pause"); system("cls"); } } else if (select[0] == '7') { system("cls"); cout << cycle << cycle_high << port << pinconf; code_calc(cycle, cycle_high, cycle_low, port, pinconf, pinhigh, portletter); system("pause"); system("cls"); } else if (select[0] == '8') // quit option { system("cls"); exit(0); system("pause"); system("cls"); } else { system("cls"); cout << "you have entered invalid input, please try again.\n"; cout << "try enter number corresponding menu item.\n"; system("pause"); system("cls"); } } } int main() { menu(); } if call function inside 1 of previous if statements a, ... g variables called, 'sort-of' works. however, thought because initiated variables @ beginning of while loop, scope whole of while loop, inside or outside of if statements.
so, variables not being passed wv_calc() function, , result, code absent of inline variables a, b, ..., g.
is there obvious i'm doing wrong?
looking @ code, lot of problems due bad organization of code.
for instance lets assume set select == 2 see sequence of execution. follows , think gets passed cycle,cycle_high, cycle_low, port , pinconf. uninitialized values carry implementation dependent
if (select[0]=='2'){ system("cls"); wv_calc(cycle, cycle_high, cycle_low, port, pinconf, pinhigh, portletter); system("pause"); system("cls"); for instance user of program have know set select == '1' initialize port, pinconf, pinhigh, portletter before setting select = '2'. may obvious not compiler generates code way write it.
if (select[0]=='1'){ system("cls"); cin.ignore(); getline(cin, port); getline(cin, port); getline(cin, pinconf); getline(cin, pinhigh); portletter = port.at(4); also don't see values of cycle, cycle_high, cycle_low being set. not being set @ before call wv_calc
updated
here's need :
void menu() { float time; float cycle; float cycle_high; float cycle_low; float period; float frequency; float duty; unsigned long long int speed; char portletter; string port; string pinconf; string pinhigh; while (1) { system("cls"); //char select[1]; //why need array here char select; menu_bs(); cin >> select; .... .... 