Milosch Meriac / Mbed 2 deprecated discrete_rgb_color_sensor_example

example for using the rgb_color_sensor class

Dependencies:   mbed rgb_sensor

main.cpp@3:3649eaf4f954, 2014-06-27 (annotated)

Committer:
meriac
Date:
Fri Jun 27 11:37:25 2014 +0000
Revision:
3:3649eaf4f954
Parent:
0:d034f4b3b23c
Child:
4:fbbc729f4152
Added callback function for new rgb_sensor class feature

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 3:3649eaf4f954 26 #define RGB_VALUES 500
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 3:3649eaf4f954 48 console.printf("%s%04i", i?",":"", color.data[i] / RGB_OVERSAMPLING);
meriac 3:3649eaf4f954 49 console.printf("]\n\r");
meriac 3:3649eaf4f954 50 }
meriac 0:d034f4b3b23c 51
meriac 0:d034f4b3b23c 52 int main() {
meriac 0:d034f4b3b23c 53 TRGB color;
meriac 0:d034f4b3b23c 54
meriac 0:d034f4b3b23c 55 console.baud(115200);
meriac 0:d034f4b3b23c 56
meriac 0:d034f4b3b23c 57 /* R,G,B pins and ADC for light dependent resistor */
meriac 0:d034f4b3b23c 58 RGB_Sensor rgb(p23,p24,p25,p20);
meriac 0:d034f4b3b23c 59
meriac 3:3649eaf4f954 60 /* detect a single RGB value to demo synchronous API */
meriac 3:3649eaf4f954 61 rgb.capture(color);
meriac 3:3649eaf4f954 62 rgb_print(color);
meriac 3:3649eaf4f954 63
meriac 0:d034f4b3b23c 64 /* needed for time measurement */
meriac 0:d034f4b3b23c 65 Timer timer;
meriac 0:d034f4b3b23c 66
meriac 3:3649eaf4f954 67 g_buffer_pos = 0;
meriac 3:3649eaf4f954 68
meriac 0:d034f4b3b23c 69 while(1) {
meriac 0:d034f4b3b23c 70
meriac 0:d034f4b3b23c 71 /* start four channel RGB conversion */
meriac 0:d034f4b3b23c 72 timer.reset();
meriac 0:d034f4b3b23c 73 timer.start();
meriac 0:d034f4b3b23c 74
meriac 3:3649eaf4f954 75 g_buffer_pos = 0;
meriac 3:3649eaf4f954 76 rgb.capture(rgb_callback);
meriac 3:3649eaf4f954 77
meriac 3:3649eaf4f954 78 rgb.wait();
meriac 0:d034f4b3b23c 79
meriac 0:d034f4b3b23c 80 /* stop time measurement */
meriac 0:d034f4b3b23c 81 timer.stop();
meriac 0:d034f4b3b23c 82
meriac 3:3649eaf4f954 83 console.printf("Captured %i values per %i ms\n\r", g_buffer_pos, timer.read_ms());
meriac 3:3649eaf4f954 84
meriac 3:3649eaf4f954 85 delay_ms(250);
meriac 0:d034f4b3b23c 86 }
meriac 0:d034f4b3b23c 87 }