Milosch Meriac / Mbed 2 deprecated discrete_rgb_color_sensor_example

example for using the rgb_color_sensor class

Dependencies:   mbed rgb_sensor

main.cpp@8:958a6512d8d1, 2014-07-09 (annotated)

Committer:
meriac
Date:
Wed Jul 09 09:02:08 2014 +0000
Revision:
8:958a6512d8d1
Parent:
6:236bee733ec3 
Updated sensor class

Who changed what in which revision?

UserRevisionLine numberNew contents of line
meriac 0:d034f4b3b23c 1 /* Discrete RGB color sensor
meriac 0:d034f4b3b23c 2 *
meriac 0:d034f4b3b23c 3 * - uses single-channel light-dependent resistor (via ADC)
meriac 0:d034f4b3b23c 4 * and a RGB LED.
meriac 0:d034f4b3b23c 5 * - compensates background light
meriac 0:d034f4b3b23c 6 *
meriac 0:d034f4b3b23c 7 * Copyright (c) 2014 ARM Limited
meriac 0:d034f4b3b23c 8 *
meriac 0:d034f4b3b23c 9 * Licensed under the Apache License, Version 2.0 (the "License");
meriac 0:d034f4b3b23c 10 * you may not use this file except in compliance with the License.
meriac 0:d034f4b3b23c 11 * You may obtain a copy of the License at
meriac 0:d034f4b3b23c 12 *
meriac 0:d034f4b3b23c 13 * http://www.apache.org/licenses/LICENSE-2.0
meriac 0:d034f4b3b23c 14 *
meriac 0:d034f4b3b23c 15 * Unless required by applicable law or agreed to in writing, software
meriac 0:d034f4b3b23c 16 * distributed under the License is distributed on an "AS IS" BASIS,
meriac 0:d034f4b3b23c 17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
meriac 0:d034f4b3b23c 18 * See the License for the specific language governing permissions and
meriac 0:d034f4b3b23c 19 * limitations under the License.
meriac 0:d034f4b3b23c 20 */
meriac 0:d034f4b3b23c 21
meriac 0:d034f4b3b23c 22 #include <mbed.h>
meriac 0:d034f4b3b23c 23 #include "rgb_sensor.h"
meriac 0:d034f4b3b23c 24
meriac 0:d034f4b3b23c 25 #define COUNT(x) (sizeof(x)/sizeof(x[0]))
meriac 6:236bee733ec3 26 #define RGB_VALUES 250
meriac 3:3649eaf4f954 27
meriac 3:3649eaf4f954 28 /* serial console */
meriac 3:3649eaf4f954 29 static uint32_t g_buffer_pos;
meriac 3:3649eaf4f954 30 static TRGB g_buffer[RGB_VALUES];
meriac 3:3649eaf4f954 31 static Serial console(USBTX, USBRX);
meriac 3:3649eaf4f954 32
meriac 3:3649eaf4f954 33 static bool rgb_callback(const TRGB &color)
meriac 3:3649eaf4f954 34 {
meriac 3:3649eaf4f954 35 if(g_buffer_pos>=RGB_VALUES)
meriac 3:3649eaf4f954 36 return false;
meriac 3:3649eaf4f954 37
meriac 3:3649eaf4f954 38 g_buffer[g_buffer_pos++] = color;
meriac 3:3649eaf4f954 39 return true;
meriac 3:3649eaf4f954 40 }
meriac 3:3649eaf4f954 41
meriac 3:3649eaf4f954 42 static void rgb_print(const TRGB &color)
meriac 3:3649eaf4f954 43 {
meriac 3:3649eaf4f954 44 int i;
meriac 3:3649eaf4f954 45
meriac 3:3649eaf4f954 46 console.printf("\t[");
meriac 3:3649eaf4f954 47 for(i=0; i<COUNT(color.data); i++)
meriac 5:1b0f9427be32 48 console.printf("%s%4i", i?",":"", color.data[i] / RGB_OVERSAMPLING);
meriac 5:1b0f9427be32 49 console.printf("]");
meriac 3:3649eaf4f954 50 }
meriac 0:d034f4b3b23c 51
meriac 0:d034f4b3b23c 52 int main() {
meriac 5:1b0f9427be32 53 int i;
meriac 5:1b0f9427be32 54 TRGB color;
meriac 0:d034f4b3b23c 55
meriac 0:d034f4b3b23c 56 console.baud(115200);
meriac 0:d034f4b3b23c 57
meriac 0:d034f4b3b23c 58 /* R,G,B pins and ADC for light dependent resistor */
meriac 0:d034f4b3b23c 59 RGB_Sensor rgb(p23,p24,p25,p20);
meriac 0:d034f4b3b23c 60
meriac 3:3649eaf4f954 61 /* detect a single RGB value to demo synchronous API */
meriac 3:3649eaf4f954 62 rgb.capture(color);
meriac 3:3649eaf4f954 63 rgb_print(color);
meriac 5:1b0f9427be32 64 console.printf(";\r\n");
meriac 3:3649eaf4f954 65
meriac 0:d034f4b3b23c 66 /* needed for time measurement */
meriac 0:d034f4b3b23c 67 Timer timer;
meriac 0:d034f4b3b23c 68
meriac 3:3649eaf4f954 69 g_buffer_pos = 0;
meriac 3:3649eaf4f954 70
meriac 0:d034f4b3b23c 71 while(1) {
meriac 0:d034f4b3b23c 72
meriac 0:d034f4b3b23c 73 /* start four channel RGB conversion */
meriac 0:d034f4b3b23c 74 timer.reset();
meriac 0:d034f4b3b23c 75 timer.start();
meriac 0:d034f4b3b23c 76
meriac 3:3649eaf4f954 77 g_buffer_pos = 0;
meriac 3:3649eaf4f954 78 rgb.capture(rgb_callback);
meriac 3:3649eaf4f954 79
meriac 3:3649eaf4f954 80 rgb.wait();
meriac 0:d034f4b3b23c 81
meriac 0:d034f4b3b23c 82 /* stop time measurement */
meriac 0:d034f4b3b23c 83 timer.stop();
meriac 0:d034f4b3b23c 84
meriac 5:1b0f9427be32 85 console.printf("// captured %i values in %i ms (%i/s)\r\nvar test = [\r\n",
meriac 5:1b0f9427be32 86 RGB_VALUES,
meriac 5:1b0f9427be32 87 timer.read_ms(),
meriac 5:1b0f9427be32 88 (RGB_VALUES*1000UL)/timer.read_ms());
meriac 5:1b0f9427be32 89
meriac 5:1b0f9427be32 90 for(i=0; i<RGB_VALUES; i++)
meriac 4:fbbc729f4152 91 {
meriac 5:1b0f9427be32 92 rgb_print(g_buffer[i]);
meriac 5:1b0f9427be32 93 console.printf(i<(RGB_VALUES-1) ? ",\r\n":"];\r\n\r\n");
meriac 4:fbbc729f4152 94 }
meriac 3:3649eaf4f954 95
meriac 4:fbbc729f4152 96 /* visible intersection between captures */
meriac 4:fbbc729f4152 97 wait_ms(100);
meriac 0:d034f4b3b23c 98 }
meriac 0:d034f4b3b23c 99 }