Shane Lobo / Mbed OS nRF52_Pulse_WaitUS

pulse consistency test using wait_us

main.cpp@1:0f0c1a9a174a, 2019-05-10 (annotated)

Committer:
punkisnail
Date:
Fri May 10 05:51:35 2019 +0000
Revision:
1:0f0c1a9a174a
Parent:
0:18409537564c 
commit 1, pulse test using wait_us

Who changed what in which revision?

UserRevisionLine numberNew contents of line
punkisnail 0:18409537564c 1 /* mbed Microcontroller Library
punkisnail 0:18409537564c 2 * Copyright (c) 2018 ARM Limited
punkisnail 0:18409537564c 3 * SPDX-License-Identifier: Apache-2.0
punkisnail 0:18409537564c 4 */
punkisnail 0:18409537564c 5
punkisnail 0:18409537564c 6 #include <mbed.h>
punkisnail 0:18409537564c 7
punkisnail 1:0f0c1a9a174a 8 #define CH_INIT 0
punkisnail 1:0f0c1a9a174a 9 #define CH_BOOST_START 1
punkisnail 1:0f0c1a9a174a 10 #define CH_BOOSTING 2
punkisnail 1:0f0c1a9a174a 11 #define CH_POST_BOOST 3
punkisnail 1:0f0c1a9a174a 12 #define CH_WAIT_200MS 4
punkisnail 1:0f0c1a9a174a 13 #define CH_WAIT_800MS 5
punkisnail 0:18409537564c 14
punkisnail 1:0f0c1a9a174a 15 Serial pc(p6, p8);
punkisnail 0:18409537564c 16
punkisnail 1:0f0c1a9a174a 17 DigitalOut led1(LED1); // Used to indicate boost state to user
punkisnail 0:18409537564c 18
punkisnail 1:0f0c1a9a174a 19 DigitalOut ch1(LED4);
punkisnail 0:18409537564c 20
punkisnail 1:0f0c1a9a174a 21 Timeout chStateTimeout;
punkisnail 1:0f0c1a9a174a 22
punkisnail 1:0f0c1a9a174a 23 Timer t;
punkisnail 0:18409537564c 24
punkisnail 1:0f0c1a9a174a 25 volatile bool ch_progress = false;
punkisnail 1:0f0c1a9a174a 26 volatile bool ch_boost_done = false;
punkisnail 0:18409537564c 27
punkisnail 1:0f0c1a9a174a 28 // -----------------------------------------------------------------------------
punkisnail 1:0f0c1a9a174a 29 void timeoutHandler() {
punkisnail 1:0f0c1a9a174a 30 ch_progress = true;
punkisnail 0:18409537564c 31 }
punkisnail 0:18409537564c 32
punkisnail 1:0f0c1a9a174a 33 // -----------------------------------------------------------------------------
punkisnail 0:18409537564c 34 int main()
punkisnail 0:18409537564c 35 {
punkisnail 1:0f0c1a9a174a 36 uint8_t ch_state = CH_INIT;
punkisnail 1:0f0c1a9a174a 37 unsigned int dummy_count = 0, dummy_count_post;
punkisnail 0:18409537564c 38
punkisnail 1:0f0c1a9a174a 39 ch1 = 0;
punkisnail 0:18409537564c 40
punkisnail 1:0f0c1a9a174a 41 while(1) {
punkisnail 1:0f0c1a9a174a 42 switch (ch_state) {
punkisnail 1:0f0c1a9a174a 43 case CH_INIT:
punkisnail 1:0f0c1a9a174a 44 ch1 = 0;
punkisnail 1:0f0c1a9a174a 45 ch_progress = false;
punkisnail 1:0f0c1a9a174a 46 ch_boost_done = false;
punkisnail 1:0f0c1a9a174a 47 dummy_count = 0;
punkisnail 1:0f0c1a9a174a 48 dummy_count_post = 0;
punkisnail 1:0f0c1a9a174a 49 ch_state = CH_BOOST_START;
punkisnail 1:0f0c1a9a174a 50 break;
punkisnail 1:0f0c1a9a174a 51 case CH_BOOST_START:
punkisnail 1:0f0c1a9a174a 52 ch_state = CH_BOOSTING;
punkisnail 1:0f0c1a9a174a 53
punkisnail 1:0f0c1a9a174a 54 led1 = 1; // Give visual indication at start of boost stage
punkisnail 1:0f0c1a9a174a 55
punkisnail 1:0f0c1a9a174a 56 case CH_BOOSTING:
punkisnail 1:0f0c1a9a174a 57 t.start();
punkisnail 1:0f0c1a9a174a 58 //core_util_critical_section_enter(); // critical sections affect the timer t?
punkisnail 1:0f0c1a9a174a 59 ch1 = 1; // Boost for 100us
punkisnail 1:0f0c1a9a174a 60 wait_us(100); // This blocks the main thread, so cannot measure during 100us boost stage
punkisnail 1:0f0c1a9a174a 61 ch1 = 0;
punkisnail 1:0f0c1a9a174a 62 //core_util_critical_section_enter();
punkisnail 1:0f0c1a9a174a 63 t.stop();
punkisnail 1:0f0c1a9a174a 64
punkisnail 1:0f0c1a9a174a 65 dummy_count++; // measure response during 100us boost stage .. will read as 1 due to blocking wait_us
punkisnail 1:0f0c1a9a174a 66
punkisnail 1:0f0c1a9a174a 67 ch_state = CH_POST_BOOST;
punkisnail 1:0f0c1a9a174a 68 chStateTimeout.attach_us(&timeoutHandler, 1000);
punkisnail 1:0f0c1a9a174a 69 case CH_POST_BOOST:
punkisnail 1:0f0c1a9a174a 70 dummy_count_post++; // measuring response after boost stage for 1ms
punkisnail 1:0f0c1a9a174a 71
punkisnail 1:0f0c1a9a174a 72 if (ch_progress) {
punkisnail 1:0f0c1a9a174a 73 ch_progress = false;
punkisnail 1:0f0c1a9a174a 74 ch_state = CH_WAIT_200MS;
punkisnail 1:0f0c1a9a174a 75 chStateTimeout.attach(&timeoutHandler, 0.2f);
punkisnail 1:0f0c1a9a174a 76 }
punkisnail 1:0f0c1a9a174a 77 break;
punkisnail 1:0f0c1a9a174a 78 case CH_WAIT_200MS:
punkisnail 1:0f0c1a9a174a 79 if (ch_progress) {
punkisnail 1:0f0c1a9a174a 80 ch_progress = false;
punkisnail 1:0f0c1a9a174a 81 led1 = 0; // Turn off boost indication
punkisnail 1:0f0c1a9a174a 82 ch_state = CH_WAIT_800MS;
punkisnail 1:0f0c1a9a174a 83 chStateTimeout.attach(&timeoutHandler, 0.8f);
punkisnail 1:0f0c1a9a174a 84 }
punkisnail 1:0f0c1a9a174a 85 break;
punkisnail 1:0f0c1a9a174a 86 case CH_WAIT_800MS:
punkisnail 1:0f0c1a9a174a 87 if (ch_progress) {
punkisnail 1:0f0c1a9a174a 88 ch_progress = false;
punkisnail 1:0f0c1a9a174a 89 ch_state = CH_INIT;
punkisnail 1:0f0c1a9a174a 90 pc.printf("CH_BOOSTING COUNT: %d; CH_POST_BOOST COUNT: %d; TIME TAKEN: %d\r\n", dummy_count, dummy_count_post, t.read_us()); // print measured response;
punkisnail 1:0f0c1a9a174a 91 t.reset();
punkisnail 1:0f0c1a9a174a 92 }
punkisnail 1:0f0c1a9a174a 93 break;
punkisnail 1:0f0c1a9a174a 94 }
punkisnail 0:18409537564c 95
punkisnail 1:0f0c1a9a174a 96 }
punkisnail 0:18409537564c 97 }