Wim van der Vegt / Mbed 2 deprecated RIT_Demo

RIT (Repetitive Interrupt Timer) Demo.

Dependencies:   mbed RIT FastAnalogIn

rit_demo.cpp@1:508cd706654a, 2022-01-18 (annotated)

Committer:
wvd_vegt
Date:
Tue Jan 18 17:16:53 2022 +0000
Revision:
1:508cd706654a
Parent:
0:faa449765bcc 
Combined with FastAnalogIn

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wvd_vegt 0:faa449765bcc 1 /* mbed Repetitive Interrupt Timer Library
wvd_vegt 0:faa449765bcc 2 * Copyright (c) 2011 wvd_vegt
wvd_vegt 0:faa449765bcc 3 *
wvd_vegt 0:faa449765bcc 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
wvd_vegt 0:faa449765bcc 5 * of this software and associated documentation files (the "Software"), to deal
wvd_vegt 0:faa449765bcc 6 * in the Software without restriction, including without limitation the rights
wvd_vegt 0:faa449765bcc 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
wvd_vegt 0:faa449765bcc 8 * copies of the Software, and to permit persons to whom the Software is
wvd_vegt 0:faa449765bcc 9 * furnished to do so, subject to the following conditions:
wvd_vegt 0:faa449765bcc 10 *
wvd_vegt 0:faa449765bcc 11 * The above copyright notice and this permission notice shall be included in
wvd_vegt 0:faa449765bcc 12 * all copies or substantial portions of the Software.
wvd_vegt 0:faa449765bcc 13 *
wvd_vegt 0:faa449765bcc 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
wvd_vegt 0:faa449765bcc 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
wvd_vegt 0:faa449765bcc 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
wvd_vegt 0:faa449765bcc 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
wvd_vegt 0:faa449765bcc 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
wvd_vegt 0:faa449765bcc 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
wvd_vegt 0:faa449765bcc 20 * THE SOFTWARE.
wvd_vegt 0:faa449765bcc 21 */
wvd_vegt 0:faa449765bcc 22
wvd_vegt 0:faa449765bcc 23 #include "mbed.h"
wvd_vegt 0:faa449765bcc 24 #include "RIT.h"
wvd_vegt 1:508cd706654a 25 #include "FastAnalogIn.h"
wvd_vegt 0:faa449765bcc 26
wvd_vegt 0:faa449765bcc 27 //We'll be using the Usb Serial port
wvd_vegt 0:faa449765bcc 28 Serial serial(USBTX, USBRX); //tx, rx
wvd_vegt 0:faa449765bcc 29
wvd_vegt 0:faa449765bcc 30 DigitalOut rit_led(LED3);
wvd_vegt 0:faa449765bcc 31
wvd_vegt 1:508cd706654a 32 FastAnalogIn a1(p19,true); //Ain1 - Peel Force
wvd_vegt 1:508cd706654a 33 FastAnalogIn a2(p20,true); //Ain2 - Seal Force
wvd_vegt 1:508cd706654a 34
wvd_vegt 1:508cd706654a 35 #define SAMPLE_BUFFER_LENGTH 1000
wvd_vegt 1:508cd706654a 36
wvd_vegt 0:faa449765bcc 37 volatile uint32_t rithits = 0; //timer1 stops when timer1hits==imer1loop
wvd_vegt 0:faa449765bcc 38
wvd_vegt 1:508cd706654a 39 volatile bool done = false;
wvd_vegt 1:508cd706654a 40 volatile short flip = 1;
wvd_vegt 1:508cd706654a 41
wvd_vegt 0:faa449765bcc 42 Timer rit_timing;
wvd_vegt 0:faa449765bcc 43
wvd_vegt 1:508cd706654a 44 static short adc1[SAMPLE_BUFFER_LENGTH] __attribute__ ((aligned (64)));
wvd_vegt 1:508cd706654a 45 static short adc2[SAMPLE_BUFFER_LENGTH] __attribute__ ((aligned (64)));
wvd_vegt 1:508cd706654a 46 static int Timing01[SAMPLE_BUFFER_LENGTH];
wvd_vegt 0:faa449765bcc 47
wvd_vegt 1:508cd706654a 48 void RIT_IRQHandler(void)
wvd_vegt 1:508cd706654a 49 {
wvd_vegt 1:508cd706654a 50 if (!done) {
wvd_vegt 1:508cd706654a 51 Timing01[rithits] = rit_timing.read_us();
wvd_vegt 1:508cd706654a 52 if (flip%2) {
wvd_vegt 1:508cd706654a 53 adc1[rithits]=a1.read_u16();
wvd_vegt 1:508cd706654a 54 } else {
wvd_vegt 1:508cd706654a 55 adc2[rithits]=a2.read_u16();
wvd_vegt 1:508cd706654a 56
wvd_vegt 1:508cd706654a 57 //Count Hits.
wvd_vegt 1:508cd706654a 58 rithits++;
wvd_vegt 1:508cd706654a 59 }
wvd_vegt 1:508cd706654a 60
wvd_vegt 1:508cd706654a 61 flip ++;
wvd_vegt 1:508cd706654a 62
wvd_vegt 1:508cd706654a 63 //Flash Led.
wvd_vegt 1:508cd706654a 64 //rit_led=!rit_led;
wvd_vegt 1:508cd706654a 65 done = rithits==SAMPLE_BUFFER_LENGTH;
wvd_vegt 1:508cd706654a 66 }
wvd_vegt 0:faa449765bcc 67 }
wvd_vegt 0:faa449765bcc 68
wvd_vegt 1:508cd706654a 69 /*
wvd_vegt 1:508cd706654a 70 LPC_TIM1->IR = 0x1UL; // Re-enabled
wvd_vegt 1:508cd706654a 71
wvd_vegt 1:508cd706654a 72 Timing01[timer1hits] = adc_stamper.read_us();
wvd_vegt 1:508cd706654a 73
wvd_vegt 1:508cd706654a 74 //TODO Toggle Channel Mask (01 to 01 in ADCR).
wvd_vegt 1:508cd706654a 75 // Take twice the number of samples at half the sampling time
wvd_vegt 1:508cd706654a 76 // So 2000 samples (1000+1000) at 0.5ms -> 1000 pairs in 1 sec.
wvd_vegt 1:508cd706654a 77
wvd_vegt 1:508cd706654a 78 switch (LPC_ADC->ADSTAT & (t_ch0|t_ch1))
wvd_vegt 1:508cd706654a 79 {
wvd_vegt 1:508cd706654a 80 case t_ch0:
wvd_vegt 1:508cd706654a 81 Samples0[timer1hits] = LPC_ADC->ADDR4;
wvd_vegt 1:508cd706654a 82 break;
wvd_vegt 1:508cd706654a 83 }
wvd_vegt 1:508cd706654a 84 }
wvd_vegt 1:508cd706654a 85 */
wvd_vegt 1:508cd706654a 86 //https://developer.mbed.org/forum/mbed/topic/370/
wvd_vegt 0:faa449765bcc 87 RIT rit(1000);
wvd_vegt 0:faa449765bcc 88
wvd_vegt 1:508cd706654a 89 //https://developer.mbed.org/handbook/Ticker
wvd_vegt 1:508cd706654a 90 //Ticker ticker;
wvd_vegt 1:508cd706654a 91
wvd_vegt 1:508cd706654a 92 //void tock()
wvd_vegt 1:508cd706654a 93 //{
wvd_vegt 1:508cd706654a 94 // Timing01[rithits] = rit_timing.read_us();
wvd_vegt 1:508cd706654a 95 //}
wvd_vegt 1:508cd706654a 96
wvd_vegt 1:508cd706654a 97 int main()
wvd_vegt 1:508cd706654a 98 {
wvd_vegt 0:faa449765bcc 99 // Set the Baudrate.
wvd_vegt 0:faa449765bcc 100 serial.baud(115200);
wvd_vegt 0:faa449765bcc 101
wvd_vegt 1:508cd706654a 102 rit.setup_us(10);
wvd_vegt 0:faa449765bcc 103
wvd_vegt 0:faa449765bcc 104 rit.append(RIT_IRQHandler);
wvd_vegt 0:faa449765bcc 105
wvd_vegt 1:508cd706654a 106 rit.enable();
wvd_vegt 0:faa449765bcc 107 rit_timing.start();
wvd_vegt 1:508cd706654a 108
wvd_vegt 1:508cd706654a 109 while (!done) {
wvd_vegt 1:508cd706654a 110 // wait(0.001);
wvd_vegt 0:faa449765bcc 111 }
wvd_vegt 1:508cd706654a 112
wvd_vegt 1:508cd706654a 113 rit_timing.stop();
wvd_vegt 0:faa449765bcc 114 rit.disable();
wvd_vegt 0:faa449765bcc 115
wvd_vegt 0:faa449765bcc 116 rit.unappend();
wvd_vegt 1:508cd706654a 117
wvd_vegt 1:508cd706654a 118 for (int i=0; i<SAMPLE_BUFFER_LENGTH; i++) {
wvd_vegt 1:508cd706654a 119 serial.printf("%3d %6.3f - %6d - %6d\r\n",i, Timing01[i]/1000.0f, adc1[i], adc2[i]);
wvd_vegt 1:508cd706654a 120 }
wvd_vegt 1:508cd706654a 121 serial.printf("%3d %6.3f - %6d - %6d\r\n",0, Timing01[0]/1000.0f, adc1[0], adc2[0]);
wvd_vegt 1:508cd706654a 122
wvd_vegt 1:508cd706654a 123 printf("COMPVAL=%d\r\n", LPC_RIT->RICOMPVAL); // 959 (960-1)
wvd_vegt 1:508cd706654a 124 printf("COUNTER=%d\r\n", LPC_RIT->RICOUNTER); // 807?
wvd_vegt 1:508cd706654a 125 printf("HITS=%d\r\n", rithits);
wvd_vegt 1:508cd706654a 126 printf("ELAPSED=%0.3f ms\r\n", rit_timing.read_us()/1000.0f);
wvd_vegt 1:508cd706654a 127 printf("ELAPSED=%0.3f ms\r\n", (Timing01[SAMPLE_BUFFER_LENGTH-1]-Timing01[0])/1000.0f);
wvd_vegt 1:508cd706654a 128
wvd_vegt 1:508cd706654a 129 /*
wvd_vegt 1:508cd706654a 130 //
wvd_vegt 1:508cd706654a 131 printf("Requested max sample rate is %u, actual max sample rate is %u.\r\n",
wvd_vegt 1:508cd706654a 132 SAMPLE_RATE, adc.actual_sample_rate());
wvd_vegt 1:508cd706654a 133
wvd_vegt 1:508cd706654a 134 adc.startmode(0,0);
wvd_vegt 1:508cd706654a 135
wvd_vegt 1:508cd706654a 136 adc.burst(1);
wvd_vegt 1:508cd706654a 137
wvd_vegt 1:508cd706654a 138 adc.setup(p15,1);
wvd_vegt 1:508cd706654a 139 adc.setup(p16,1);
wvd_vegt 1:508cd706654a 140
wvd_vegt 1:508cd706654a 141 //For burst mode, only one interrupt is required
wvd_vegt 1:508cd706654a 142 //which can be on any enabled pin. We have enabled all
wvd_vegt 1:508cd706654a 143 //of them here.
wvd_vegt 1:508cd706654a 144 adc.interrupt_state(p15,1);
wvd_vegt 1:508cd706654a 145 adc_timing.reset();
wvd_vegt 1:508cd706654a 146 adc_timing.start();
wvd_vegt 1:508cd706654a 147
wvd_vegt 1:508cd706654a 148 //10 ms sample time.
wvd_vegt 1:508cd706654a 149 rit.setup_ms(10);
wvd_vegt 1:508cd706654a 150
wvd_vegt 1:508cd706654a 151 //Clear ADC Storage stuff...
wvd_vegt 1:508cd706654a 152 adchits = 0;
wvd_vegt 1:508cd706654a 153 memset(Samples0, 0,sizeof(Samples0));
wvd_vegt 1:508cd706654a 154 memset(Samples1, 0,sizeof(Samples1));
wvd_vegt 1:508cd706654a 155
wvd_vegt 1:508cd706654a 156 rit.append(Adc_IRQHandler);
wvd_vegt 1:508cd706654a 157
wvd_vegt 1:508cd706654a 158 rit_timing.reset();
wvd_vegt 1:508cd706654a 159 rit_timing.start();
wvd_vegt 1:508cd706654a 160
wvd_vegt 1:508cd706654a 161 rit.enable();
wvd_vegt 1:508cd706654a 162
wvd_vegt 1:508cd706654a 163 //To be sure...
wvd_vegt 1:508cd706654a 164 while (adchits!=MAX_SAMPLES) {
wvd_vegt 1:508cd706654a 165 wait(0.01);
wvd_vegt 1:508cd706654a 166 }
wvd_vegt 1:508cd706654a 167
wvd_vegt 1:508cd706654a 168 rit.disable();
wvd_vegt 1:508cd706654a 169
wvd_vegt 1:508cd706654a 170 rit_timing.stop();
wvd_vegt 1:508cd706654a 171
wvd_vegt 1:508cd706654a 172 rit.unappend();
wvd_vegt 1:508cd706654a 173
wvd_vegt 1:508cd706654a 174 for (int i=0; i < MAX_SAMPLES; i++) {
wvd_vegt 1:508cd706654a 175 printf("%04d=%04d | %04d @ %08d\r\n", i, Samples0[i], Samples1[i], Timing01[i]);
wvd_vegt 1:508cd706654a 176 }
wvd_vegt 1:508cd706654a 177
wvd_vegt 1:508cd706654a 178 printf("ELAPSED=%0.2f ms\r\n", rit_timing.read_us()/1000);
wvd_vegt 1:508cd706654a 179 printf("HITS=%d\r\n", adchits);
wvd_vegt 1:508cd706654a 180
wvd_vegt 1:508cd706654a 181 adc.burst(0);
wvd_vegt 1:508cd706654a 182
wvd_vegt 1:508cd706654a 183 adc.setup(p15,0);
wvd_vegt 1:508cd706654a 184 adc.setup(p16,0);
wvd_vegt 1:508cd706654a 185
wvd_vegt 1:508cd706654a 186 adc.interrupt_state(p15,0);
wvd_vegt 1:508cd706654a 187
wvd_vegt 1:508cd706654a 188 adc_timing.stop();
wvd_vegt 1:508cd706654a 189 */
wvd_vegt 0:faa449765bcc 190 }