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12 years ago.
One function for all analog inputs
Hallo!
i have a queastion about the analog inputs. To read all analog inputs i have normaly to write for everyone input a little function. After reading i will show all values on an lcd display. All of this function are not long, but i have to write 5 time all of them. That makes me crazy..
#include "mbed.h"
#include "TextLCD.h"
TextLCD lcd(p5, p6, p7, p8, p9, p10, TextLCD::LCD20x2); // rs, e, d4-d7 , type=LCD20x2
AnalogIn voltage1(p15);voltage2(p16);voltage3(p17);voltage4(p18);voltage5(p19);voltage6(p20);
/* float read_out_chan(int &channel)
{
AnalogIn value(channel);
return value.read();
}*/
int main()
{
while(1)
{
lcd.printf("Voltage1: %2.4f\n", voltage1.read());
lcd.printf("Voltage2: %2.4f\n", voltage2.read());
lcd.printf("Voltage3: %2.4f\n", voltage3.read());
lcd.printf("Voltage4: %2.4f\n", voltage4.read());
lcd.printf("Voltage5: %2.4f\n", voltage5.read());
lcd.printf("Voltage6: %2.4f\n", voltage6.read());
}
}
My question is: Is it possible to write one function for all channels. May be like:
*channel=p20;
float read_out_chan(int &channel)
{
AnalogIn value(channel);
lcd.printf("Voltage: %2.4f\n", value.read());
return value.read();
}
//P.S.: this code doesn't work
Sorry for my english....
1 Answer
11 years, 9 months ago.
You don't need to have a function if you don't want. An array of AnalogIns that you can loop over would suffice.
#include "mbed.h"
#include "TextLCD.h"
TextLCD lcd(p5, p6, p7, p8, p9, p10, TextLCD::LCD20x2); // rs, e, d4-d7 , type=LCD20x2
AnalogIn ain[] = {p15, p16, p17, p18, p19, p20};
int main()
{
while(1) {
for (int i=0; i < 6; i++) {
lcd.printf("Voltage%d: %2.4f\n", i+1, ain[i].read());
}
}
}