03-05 SevenSegDisplay
From Manuals
This example demonstrates the BusOut function to display digits on a 7-segment display with a common cathode. It displays digits 0, 1, 2, 3 in turn.
The signals used for this example are listed below:
| Signal | LPC4330 PIN NAME | BAM210E | BAM210 | BAM200E | BAM200 | Used for |
| D0 | P6_5 | J9-1 | J9-1 | S2-5 | S2-5 | Segment A |
| D1 | P6_4 | J9-2 | J9-2 | S2-4 | S2-4 | Segment B |
| D2 | P1_7 | J9-3 | J9-3 | S3-7 | S3-7 | Segment C |
| D3 | P4_0 | J9-3 | J9-3 | S3-7 | S3-7 | Segment D |
| D4 | P6_9 | J9-4 | J9-4 | S8-7 | n/p | Segment E |
| D5 | P5_5 | J9-5 | J9-5 | S3-8 | S3-8 | Segment F |
| D6 | P5_7 | J9-6 | J9-6 | S3-9 | S3-9 | Segment G |
| D7 | P7_6 | J9-7 | J9-7 | S4-6 | S4-6 | Segment DP |
The following schematic can be used to build the circuit with a BAM210E or BAM210.
Schematic for example 03-05
/*Program Example 3.5: Simple demonstration of 7-segment display. Display digits 0, 1, 2, 3 in turn.
*/
#include "mbed.h"
BusOut display(D0,D1,D2,D3,D4,D5,D6,D7); // segments a,b,c,d,e,f,g,dp
int main()
{
while(1) {
for(int i=0; i<4; i++) {
switch (i) {
case 0:
display = 0x3F;
break; //display 0
case 1:
display = 0x06;
break; //display 1
case 2:
display = 0x5B;
break;
case 3:
display = 0x4F;
break;
} //end of switch
wait(0.2);
} //end of for
} //end of while
}
The following image shows the built circuit on a BAM210E.
