DFRobot TCS3200 Color Sensor w/ Orangutan Microcontroller
denorro 2013-01-26 15:38:25 9364 Views5 Replies I have been trying to get the tcs3200(https://wiki.dfrobot.com/TCS3200_Color_Sensor__SKU_SEN0101_) color sensor to give me back some meaningful values for some time now. I am using a pololu microcontroller so the code that comes with the sensor doesn't work for me like it would an Arduino. My micro has functions similar to the Arduino but I tried rewriting the arduino code to fit my micro but it still doesn't work. Can I set out pin on the color sensor as a digital input and read values from there or use some pulse function to read a value from it.
In my code i tried this routine:
1. Set s0-s3 as outputs just like the arduino code.
2. set s0 ad s1 both as high to configure 100% scaling.
3. set s2 and s3 as low to config. red filter.
4. set the out pin as an high input to hopefully get some value back from the pin. I also used a pulse() function
from my micro's library but it only give me a 1 or 0.
5. I also have the LED'S on through this whole process and turning off at the end and process starts over.
Here is some code I have written for it:
Code: Select all#include <pololu/orangutan.h> void blinkLED(int ms) // ms is the blinking time for LED for milli-seconds { set_digital_output(IO_B3,HIGH); delay(ms); set_digital_output(IO_B3,LOW); delay(ms); } void startLED() { set_digital_output(IO_B3,HIGH); } void stopLED() { set_digital_output(IO_B3,LOW); } void selectRed() // SELECT RED FILTER, ONLY LETS IN RED LIGHT { set_digital_output(IO_C1,LOW); set_digital_output(IO_D0,LOW); } void selectGreen() // SELECT GREEN FILTER, ONLY LETS IN GREEN LIGHT { set_digital_output(IO_C1,HIGH); set_digital_output(IO_D0,HIGH); } void selectBlue() // SELECT BLUE FILTER, ONLY LETS IN BLUE LIGHT { set_digital_output(IO_C1,LOW); set_digital_output(IO_D0,HIGH); } int main() { while(1) { startLED(); set_digital_output(IO_B4,HIGH); set_digital_output(IO_C0,HIGH); selectRed(); pulse_in_start(IO_D1,1); set_digital_input(IO_D1,PULL_UP_ENABLED); print(new_pulse(get_last_high_pulse(IO_D1))); delay(500); clear(); stopLED(); delay(500); } }
Here is a link to my micro's library and commands reference:
http://www.pololu.com/docs/0J20 and http://www.pololu.com/docs/0J18
COULD ANYONE GIVE SOME SOME HELP WITH THIS COLOR SENSOR?
Phoebe Micro pin B3 is connected to the led pin on the sensor
Micro pins D0 and D1 is connected to pin S2,S3 on the color sensor that I'm using to set the filters.
(r,g,b,clear filters)
micro pin D2 is the output pin from the color sensor that sends the data back to the micro.
The get_last_high_pulse returns the duration of the high pulse from that square wave and enclose it in pulse_to_microseconds to convert that time in microseconds otherwise it will give me the time in multiples of 0.04 microseconds.
denorro Phoebe PLEASE DO SHARE YOUR THOUGHTS! ALL ARE WELCOME!
Here is my code:
//unsigned long sum = 0; unsigned long red = 0; unsigned long green = 0; unsigned long blue = 0; unsigned long Clear = 0; set_digital_output(IO_C0,LOW); set_digital_output(IO_C1,HIGH); set_digital_input(IO_D2,PULL_UP_ENABLED); pulse_in_start((unsigned char[]){IO_D2},1); while(1){ ledOn(); if(new_high_pulse(0)){ set_digital_output(IO_D0,HIGH); // clear filter set_digital_output(IO_D1,HIGH); // clear filter delay(10); Clear = pulse_to_microseconds(get_last_high_pulse(0)); // get the length of pulse of clear int clearFreq = (1 / (2 * (Clear * 0.000001))); //converts the duration to microseconds and f = 1 / 2*T set_digital_output(IO_D0,LOW); // RED FILTER set_digital_output(IO_D1,LOW); // RED FILTER delay(10); red = pulse_to_microseconds(get_last_high_pulse(0)); // get the length of pulse of red int redFreq = (1 / (2 * (red * 0.000001))); set_digital_output(IO_D0,HIGH); // GREEN FILTER set_digital_output(IO_D1,HIGH); // GREEN FILTER delay(10); green = pulse_to_microseconds(get_last_high_pulse(0)); int greenFreq = (1 / (2 * (green * 0.000001))); set_digital_output(IO_D0,LOW); // BLUE FILTER set_digital_output(IO_D1,HIGH); // BLUE FILTER delay(10); blue = pulse_to_microseconds(get_last_high_pulse(0)); int blueFreq = (1 / (2 * (blue * 0.000001))); print("r:"); print_long(red); lcd_goto_xy(8,0); print("g:"); print_long(green); lcd_goto_xy(0,1); print("b:"); print_long(blue); lcd_goto_xy(8,1); print("c:"); print_long(Clear); delay(2000); clear(); //print("r:"); print_long(redFreq); lcd_goto_xy(8,0); //print("g:"); print_long(greenFreq); lcd_goto_xy(0,1); //print("b:"); print_long(blueFreq); lcd_goto_xy(8,1); //print("c:"); print_long(clearFreq); delay(2000); clear(); }
Try to capture the sensor input from the out pin using the interrupt IO pin of your pololu microcontroller!
The scaling you setting now runs very fast. I suggest to try it with a lower frequency when testing first.
Look forward to your response.
Lauren 