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This commit is contained in:
Tom Igoe 2009-06-30 15:15:48 +00:00
parent d58a4f8d8e
commit 45918cf5ae
1 changed files with 10 additions and 13 deletions
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23
build/shared/dist/examples/Display/RowColumnScanning/RowColumnScanning.pde vendored
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@ -11,9 +11,9 @@
http://sigma.octopart.com/140413/datasheet/Lumex-LDM-24488NI.pdf http://sigma.octopart.com/140413/datasheet/Lumex-LDM-24488NI.pdf
for the pin connections for the pin connections
For other LED cathode column matrixes, you should only need to change For other LED cathode column matrixes, you should only need to change
the pin numbers in the row[] and column[] arrays the pin numbers in the row[] and column[] arrays
rows are the anodes rows are the anodes
cols are the cathodes cols are the cathodes
--------- ---------
@ -26,19 +26,15 @@
* center pins are attached to analog pins 0 and 1, respectively * center pins are attached to analog pins 0 and 1, respectively
* side pins attached to +5V and ground, respectively. * side pins attached to +5V and ground, respectively.
http://www.arduino.cc/en/Tutorial/RowColumnScanning http://www.arduino.cc/en/Tutorial/RowColumnScanning
see also http://www.tigoe.net/pcomp/code/category/arduinowiring/514 for more see also http://www.tigoe.net/pcomp/code/category/arduinowiring/514 for more
*/ */
// max and min values from the accelerometer,
// found by experiment:
const int sensorMin = 380;
const int sensorMax = 620;
// 2-dimensional array of row pin numbers: // 2-dimensional array of row pin numbers:
const int row[8] = { const int row[8] = {
2,7,19,5,18,12,16 }; 2,7,19,5,18,12,16 };
// 2-dimensional array of column pin numbers: // 2-dimensional array of column pin numbers:
const int col[8] = { const int col[8] = {
@ -85,8 +81,10 @@ void readSensors() {
// turn off the last position: // turn off the last position:
pixels[x][y] = HIGH; pixels[x][y] = HIGH;
// read the sensors for X and Y values: // read the sensors for X and Y values:
x = 7 - map(analogRead(0), sensorMin, sensorMax, 0, 7); x = 7 - map(analogRead(0), 0, 1023, 0, 7);
y = map(analogRead(1), sensorMin, sensorMax, 0, 7); y = map(analogRead(1), 0, 1023, 0, 7);
// set the new pixel position low so that the LED will turn on
// in the next screen refresh:
pixels[x][y] = LOW; pixels[x][y] = LOW;
} }
@ -112,4 +110,3 @@ void refreshScreen() {
digitalWrite(row[thisRow], LOW); digitalWrite(row[thisRow], LOW);
} }
} }