Justin Jordan / Mbed OS SerialPlotter_Test

Simple demo for SerialPlotter program found at following link https://developer.mbed.org/users/borislav/notebook/serial-port-plotter/

main.cpp@1:0951a80a60e2, 2017-09-07 (annotated)

Committer:
j3
Date:
Thu Sep 07 23:02:08 2017 +0000
Revision:
1:0951a80a60e2
Parent:
0:cdcbb66ba497
Child:
2:7a66c77ff328
added comments

Who changed what in which revision?

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j3 1:0951a80a60e2 1 /******************************************************************************
j3 1:0951a80a60e2 2 * MIT License
j3 0:cdcbb66ba497 3 *
j3 1:0951a80a60e2 4 * Copyright (c) 2017 Justin J. Jordan
j3 0:cdcbb66ba497 5 *
j3 1:0951a80a60e2 6 * Permission is hereby granted, free of charge, to any person obtaining a copy
j3 1:0951a80a60e2 7 * of this software and associated documentation files (the "Software"), to deal
j3 1:0951a80a60e2 8 * in the Software without restriction, including without limitation the rights
j3 1:0951a80a60e2 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
j3 1:0951a80a60e2 10 * copies of the Software, and to permit persons to whom the Software is
j3 1:0951a80a60e2 11 * furnished to do so, subject to the following conditions:
j3 1:0951a80a60e2 12
j3 1:0951a80a60e2 13 * The above copyright notice and this permission notice shall be included in all
j3 1:0951a80a60e2 14 * copies or substantial portions of the Software.
j3 1:0951a80a60e2 15
j3 1:0951a80a60e2 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
j3 1:0951a80a60e2 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
j3 1:0951a80a60e2 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
j3 1:0951a80a60e2 19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
j3 1:0951a80a60e2 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
j3 1:0951a80a60e2 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
j3 1:0951a80a60e2 22 * SOFTWARE.
j3 1:0951a80a60e2 23 ******************************************************************************/
j3 0:cdcbb66ba497 24
j3 0:cdcbb66ba497 25
j3 0:cdcbb66ba497 26 //https://developer.mbed.org/users/borislav/notebook/serial-port-plotter/
j3 0:cdcbb66ba497 27
j3 1:0951a80a60e2 28
j3 0:cdcbb66ba497 29 #include "mbed.h"
j3 0:cdcbb66ba497 30
j3 0:cdcbb66ba497 31
j3 0:cdcbb66ba497 32 int32_t float_to_int(float f);
j3 0:cdcbb66ba497 33
j3 0:cdcbb66ba497 34
j3 0:cdcbb66ba497 35 int main()
j3 0:cdcbb66ba497 36 {
j3 0:cdcbb66ba497 37 DigitalOut rLed(LED_RED, 1);
j3 0:cdcbb66ba497 38 DigitalOut gLed(LED_GREEN, 1);
j3 0:cdcbb66ba497 39 DigitalOut bLed(LED_BLUE, 1);
j3 0:cdcbb66ba497 40
j3 0:cdcbb66ba497 41 DigitalOut leds[] = {rLed, gLed, bLed};
j3 0:cdcbb66ba497 42
j3 0:cdcbb66ba497 43 Serial debug(USBTX, USBRX);
j3 0:cdcbb66ba497 44 debug.baud(115200);
j3 0:cdcbb66ba497 45
j3 0:cdcbb66ba497 46 //const float PI = 3.14159265F;
j3 0:cdcbb66ba497 47 float angle[] = {0.0F, 120.0F, 240.0F};
j3 0:cdcbb66ba497 48 float sinScaled;
j3 0:cdcbb66ba497 49 int32_t data[3];
j3 0:cdcbb66ba497 50 uint32_t cnt = 0;
j3 0:cdcbb66ba497 51
j3 0:cdcbb66ba497 52 while(1)
j3 0:cdcbb66ba497 53 {
j3 0:cdcbb66ba497 54 //get data
j3 0:cdcbb66ba497 55 for(uint32_t idx = 0; idx < 3; idx++)
j3 0:cdcbb66ba497 56 {
j3 0:cdcbb66ba497 57 //get sin, scaled up and offset above 0
j3 0:cdcbb66ba497 58 sinScaled = (100 + (100.0F * sin(angle[idx]*(PI/180.0F))));
j3 0:cdcbb66ba497 59 data[idx] = float_to_int(sinScaled);
j3 0:cdcbb66ba497 60
j3 0:cdcbb66ba497 61 //inc angle, check for roll over
j3 0:cdcbb66ba497 62 angle[idx] += 1.0F;
j3 0:cdcbb66ba497 63 if(angle[idx] > 360.0F)
j3 0:cdcbb66ba497 64 {
j3 0:cdcbb66ba497 65 angle[idx] = 0.0F;
j3 0:cdcbb66ba497 66 }
j3 0:cdcbb66ba497 67 }
j3 0:cdcbb66ba497 68
j3 0:cdcbb66ba497 69 //plot
j3 0:cdcbb66ba497 70 debug.printf("$%d %d %d;", data[0], data[1], data[2]);
j3 0:cdcbb66ba497 71
j3 0:cdcbb66ba497 72 //blink some lights, just cause you have to
j3 0:cdcbb66ba497 73 leds[cnt % 3] = !leds[cnt % 3];
j3 0:cdcbb66ba497 74 cnt++;
j3 0:cdcbb66ba497 75
j3 0:cdcbb66ba497 76 //wait a bit
j3 0:cdcbb66ba497 77 wait(0.01F);
j3 0:cdcbb66ba497 78 }
j3 0:cdcbb66ba497 79 }
j3 0:cdcbb66ba497 80
j3 0:cdcbb66ba497 81
j3 0:cdcbb66ba497 82 int32_t float_to_int(float f)
j3 0:cdcbb66ba497 83 {
j3 0:cdcbb66ba497 84 int32_t i;
j3 0:cdcbb66ba497 85
j3 0:cdcbb66ba497 86 if (f >= 0.0F)
j3 0:cdcbb66ba497 87 {
j3 0:cdcbb66ba497 88 i = static_cast<int32_t>(f + 0.5F);
j3 0:cdcbb66ba497 89 }
j3 0:cdcbb66ba497 90 else
j3 0:cdcbb66ba497 91 {
j3 0:cdcbb66ba497 92 i = static_cast<int32_t>(f - 0.5F);
j3 0:cdcbb66ba497 93 }
j3 0:cdcbb66ba497 94
j3 0:cdcbb66ba497 95 return i;
j3 0:cdcbb66ba497 96 }