Jovan Ivković / Mbed 2 deprecated Nucleo_bitbanging_portsD5-D7led

Bit-banging - Port (pin) setting and pattern generation Speed - Benchmark. Measure internal port (pattern) setting time and can preset 10bit pattern for 1k runs for external measures.

Dependencies:   mbed

main.cpp@11:de680c2510a6, 2017-01-04 (annotated)

Committer:
JovanEps
Date:
Wed Jan 04 16:33:24 2017 +0000
Revision:
11:de680c2510a6
Parent:
10:51adb7641cd7 
Final version 1.0.1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
screamer 0:005629fe3609 1 #include "mbed.h"
JovanEps 6:64a3bea8be86 2 //********************************************************
JovanEps 6:64a3bea8be86 3 //** Nucleo-144 Stm32F746 and Stm32F767 bitbanging ******
JovanEps 7:13ae8d34cc97 4 //** Port setting and pattern generation ******
JovanEps 7:13ae8d34cc97 5 //** Speed - Benchmark ******
JovanEps 7:13ae8d34cc97 6 //** Jovan Ivković - 2016. ******
JovanEps 7:13ae8d34cc97 7 //** JovanEps (jovan.eps@gmail.com). ******
JovanEps 6:64a3bea8be86 8 //********************************************************
JovanEps 7:13ae8d34cc97 9
screamer 0:005629fe3609 10 DigitalOut myled(LED1);
JovanEps 5:64511b302803 11 DigitalOut PD7(PF_13);
JovanEps 7:13ae8d34cc97 12 DigitalOut PD5(PE_11); //introduce D5 pin-out it ping faster :)
JovanEps 6:64a3bea8be86 13 DigitalOut PD13(PA_5); //introduce D13 pin-out
JovanEps 6:64a3bea8be86 14 Serial pc(USBTX, USBRX);
JovanEps 7:13ae8d34cc97 15 Timer timer;
screamer 0:005629fe3609 16
JovanEps 7:13ae8d34cc97 17 void Pinging()
JovanEps 7:13ae8d34cc97 18 {
JovanEps 10:51adb7641cd7 19 int i, vreme = 0, loop_vreme=0, noop=0;
JovanEps 7:13ae8d34cc97 20 while(1) {
JovanEps 7:13ae8d34cc97 21 // Pattern and port setting speed benchmark
JovanEps 7:13ae8d34cc97 22 timer.start();
JovanEps 11:de680c2510a6 23 // Measure loop and value setting time for 1k runs
JovanEps 10:51adb7641cd7 24 loop_vreme = timer.read_us();
JovanEps 10:51adb7641cd7 25 for ( i = 0; i <= 999; i++ ) {
JovanEps 11:de680c2510a6 26 noop = i;
JovanEps 10:51adb7641cd7 27 }
JovanEps 10:51adb7641cd7 28 // -----
JovanEps 10:51adb7641cd7 29 loop_vreme = timer.read_us() - loop_vreme;
JovanEps 10:51adb7641cd7 30 timer.reset();
JovanEps 11:de680c2510a6 31 // Measure 10 bit sequence pattern
JovanEps 7:13ae8d34cc97 32 vreme = timer.read_us();
JovanEps 10:51adb7641cd7 33 for ( i = 0; i <= 999; i++ ) {
JovanEps 11:de680c2510a6 34 PD5 = 1; // D5 go low 1 go LOW in next 69..75ns as Tf propagates signal on osciloscope
JovanEps 7:13ae8d34cc97 35 PD5 = 1; // D5 go low 2
JovanEps 7:13ae8d34cc97 36 PD5 = 1; // D5 go low 3
JovanEps 7:13ae8d34cc97 37 PD5 = 0; // D5 go inv-high on SN74vhc14 - >1.6..2.4V < 1.75ns
JovanEps 7:13ae8d34cc97 38 PD5 = 1; // D5 go low 5
JovanEps 7:13ae8d34cc97 39 PD5 = 1; // D5 go low 6
JovanEps 7:13ae8d34cc97 40 PD5 = 1; // D5 go low 7
JovanEps 7:13ae8d34cc97 41 PD5 = 1; // D5 go low 8
JovanEps 7:13ae8d34cc97 42 PD5 = 1; // D5 go low 9
JovanEps 7:13ae8d34cc97 43 PD5 = 1; // D5 go low 10
JovanEps 7:13ae8d34cc97 44 }
JovanEps 7:13ae8d34cc97 45 vreme = timer.read_us() - vreme;
JovanEps 7:13ae8d34cc97 46 wait_us(0.2);
JovanEps 10:51adb7641cd7 47 pc.printf("Port set time (single)... %6.2f ns \t tested on for: %d runs \n", ( float ) ( vreme - loop_vreme ) / 10, i * 10 ); //1000x10=10k sets of PD5 div 10 for ns
JovanEps 11:de680c2510a6 48 pc.printf("\n %d \n\n", noop+1);
JovanEps 7:13ae8d34cc97 49 timer.stop();
JovanEps 7:13ae8d34cc97 50
JovanEps 7:13ae8d34cc97 51 /* // Alternative
JovanEps 7:13ae8d34cc97 52 while(1) {
JovanEps 6:64a3bea8be86 53 PD5 = 0; // D5 go low 1
JovanEps 6:64a3bea8be86 54 PD5 = 0; // D5 go low 2
JovanEps 6:64a3bea8be86 55 PD5 = 0; // D5 go low 3
JovanEps 7:13ae8d34cc97 56 PD5 = 1; // D5 go inv-low on 74vhc14 - <0.6v..0.9V < 1.6ns
JovanEps 6:64a3bea8be86 57 PD5 = 0; // D5 go low 5
JovanEps 6:64a3bea8be86 58 PD5 = 0; // D5 go low 6
JovanEps 6:64a3bea8be86 59 PD5 = 0; // D5 go low 7
JovanEps 6:64a3bea8be86 60 PD5 = 0; // D5 go low 8
JovanEps 6:64a3bea8be86 61 PD5 = 0; // D5 go low 9
JovanEps 6:64a3bea8be86 62 PD5 = 0; // D5 go low 10
JovanEps 7:13ae8d34cc97 63 wait_us(0.3);
JovanEps 7:13ae8d34cc97 64 */
JovanEps 7:13ae8d34cc97 65 //pc.printf("\n");
JovanEps 6:64a3bea8be86 66 }
JovanEps 7:13ae8d34cc97 67 }
JovanEps 7:13ae8d34cc97 68
JovanEps 7:13ae8d34cc97 69 int main()
JovanEps 7:13ae8d34cc97 70 {
JovanEps 5:64511b302803 71 myled = 1; // LED is ON - working
JovanEps 6:64a3bea8be86 72 pc.baud(115200);
JovanEps 7:13ae8d34cc97 73 //pc.baud(921600); // Max garanted UART/seriall speed
JovanEps 7:13ae8d34cc97 74 pc.printf("Starting...\n");
JovanEps 7:13ae8d34cc97 75 wait(0.2); // 200 ms
JovanEps 7:13ae8d34cc97 76
JovanEps 7:13ae8d34cc97 77 //NVIC_DisableIRQ(XXX); // Disable NVIC interrupt;
JovanEps 10:51adb7641cd7 78 Pinging(); //Call of Pinging methode
JovanEps 10:51adb7641cd7 79
JovanEps 6:64a3bea8be86 80 /*
screamer 0:005629fe3609 81 while(1) {
JovanEps 11:de680c2510a6 82 // PD7 = 1; // D7 go high in Tr ~69..75ns
JovanEps 7:13ae8d34cc97 83 //PD13 = 1; // D13 go high has delay of
JovanEps 6:64a3bea8be86 84 // myled = 1;
JovanEps 7:13ae8d34cc97 85
JovanEps 6:64a3bea8be86 86 PD5 = 0; // D5 go high
JovanEps 6:64a3bea8be86 87 //wait(0); // 1ns - exclude, we need as fast as we can get
JovanEps 11:de680c2510a6 88 // PD7 = 0; // D7 go low in next 69..74ns
JovanEps 7:13ae8d34cc97 89 //PD13 = 0; // D13 go high
JovanEps 6:64a3bea8be86 90 // PD7 = 1;
JovanEps 6:64a3bea8be86 91 //PD13 = 1; // D13 go high
JovanEps 6:64a3bea8be86 92 PD5 = 0;
JovanEps 6:64a3bea8be86 93 // PD13 = 0; // D13 go high
JovanEps 6:64a3bea8be86 94 //myled = 0;
JovanEps 6:64a3bea8be86 95 PD5 = 0; // D5 go low
JovanEps 6:64a3bea8be86 96 PD5 = 1; // D5 go inv-high on 74vhc14 - 1v
JovanEps 6:64a3bea8be86 97 PD5 = 0; // D5 go low
JovanEps 6:64a3bea8be86 98 PD5 = 1; // D5 go inv-high on 74vhc14 -2v
JovanEps 6:64a3bea8be86 99 PD5 = 0; // D5 go low 2v
JovanEps 6:64a3bea8be86 100 PD5 = 1; // D5 go inv-high on 74vhc14 - 2v
JovanEps 6:64a3bea8be86 101 PD5 = 0; // D5 go low 2v
JovanEps 6:64a3bea8be86 102 PD5 = 1; // D5 go inv-high on 74vhc14 - 3v
JovanEps 6:64a3bea8be86 103 PD5 = 0; // D5 go low 3v
JovanEps 6:64a3bea8be86 104 //v4 111010101010101 4-low lead and 6-inv-peek
JovanEps 6:64a3bea8be86 105 PD5 = 1; // D5 go inv-high on 74vhc14 - 4v
JovanEps 6:64a3bea8be86 106 PD5 = 0; // D5 go low 4v
JovanEps 6:64a3bea8be86 107 PD5 = 1; // D5 go inv-high on 74vhc14 - 4v
JovanEps 6:64a3bea8be86 108 PD5 = 0; // D5 go low 4v
JovanEps 6:64a3bea8be86 109 //wait(0);// 1nsec - exclude, we need as fast as we can get
JovanEps 7:13ae8d34cc97 110
JovanEps 7:13ae8d34cc97 111 }
JovanEps 7:13ae8d34cc97 112 */
screamer 0:005629fe3609 113 }