| | | | |
 |  |  |  |
| |||||||
| Micro Controllers Discuss all aspects of micro controllers - building them, coding them, etc. All controllers are welcome - PIC, BASIC, Z8 Encore!, etc. |
 |
| | LinkBack | Thread Tools | Display Modes |
10th February 2005, 10:51 PM
| (permalink) |
 basic led blinking with micro controller I know, this is basic but I am having trouble getting this to work. I want to do it in C and am using the PIC C compiler. I also am using a PIC18F452 micro controller. In the I/O tab in setup i selected ports D0-D7 and C0-C7 as outputs. everything else I left default. here is the code i made: Code: #include "H:\windowsdata\Desktop\Embedded\blink\blink.h"
void main()
{
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_psp(PSP_DISABLED);
setup_spi(FALSE);
setup_wdt(WDT_OFF);
setup_timer_0(RTCC_INTERNAL);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_timer_3(T3_DISABLED|T3_DIV_BY_1);
set_tris_c(0);
set_tris_d(0);
while(1) {
OUTPUT_HIGH(PIN_D0);
delay_ms(100);
OUTPUT_HIGH(PIN_D1);
delay_ms(100);
OUTPUT_HIGH(PIN_D2);
delay_ms(100);
OUTPUT_HIGH(PIN_D3);
delay_ms(100);
OUTPUT_HIGH(PIN_D4);
delay_ms(100);
OUTPUT_HIGH(PIN_D5);
delay_ms(100);
OUTPUT_HIGH(PIN_D6);
delay_ms(100);
OUTPUT_HIGH(PIN_D7);
delay_ms(100);
OUTPUT_HIGH(PIN_C0);
delay_ms(100);
OUTPUT_HIGH(PIN_C1);
delay_ms(100);
}
} Code: #include <18F452.h> #device adc=8 #use delay(clock=20000000) #fuses NOWDT,WDT128,RC_IO, NOPROTECT, NOOSCSEN, BROWNOUT, BORV20, NOPUT, STVREN, NODEBUG, NOLVP, NOWRT, NOWRTD, NOWRTB, NOWRTC, NOCPD, NOCPB, NOEBTR, NOEBTRB | |
|
|
10th February 2005, 11:07 PM
| (permalink) |
| You must set TRIS registers in order to use the ports as outputs. Use 'set_tris_c(0);' and 'set_tris_d(0);' before your while loop. Good luck! | |
|
|
|
10th February 2005, 11:30 PM
| (permalink) |
| thanks for the reply, I updated the code and am still unable to get any leds blinking off of those ports. any other suggestions? thanks | |
|
|
|
11th February 2005, 12:12 AM
| (permalink) |
| I have a simple blink program for the 452 that I use as a 'does it work?' routine that I'll post as soon as I get to my main machine. I'm on my PDA at the moment. Until then, did you make sure you decoupled the power to the chip? I mean, a 10uf cap between Vcc and gnd near the chip? just a thought.
__________________ Hop I think, therefore I crash | |
|
|
|
11th February 2005, 12:19 AM
| (permalink) |
| yup, have the cap...circuit works fine, that I know for a fact. My friend used this exact setup for his labs and we checked it already with some of his code. Problem is I am using C and he doesnt really ever use it. So we are both at a loss. | |
|
|
|
11th February 2005, 12:25 AM
| (permalink) |
| (deleted) | |
|
|
|
11th February 2005, 02:06 AM
| (permalink) |
| Here is my code to blink 5 LED's (like Knightrider) with 16F877A on the MSB's of PORTB: Code: /////////////////////////////////////////////////////////////////////////
//// LED1C.C ////
//// ////
//// Enciende 5 LED's sucesivamente ////
/////////////////////////////////////////////////////////////////////////
//// ////
/////////////////////////////////////////////////////////////////////////
#include <16F877A.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP,NOPUT,NOBROWNOUT
#use delay(clock=8000000)
#use fast_io(B)
void delay_meds(int n)
{
for(n;n!=0;n--)
delay_ms(50);
}
main()
{
set_tris_b(0x00);
while(TRUE)
{
output_b(0x80);
delay_meds(1);
output_b(0x40);
delay_meds(1);
output_b(0x20);
delay_meds(1);
output_b(0x10);
delay_meds(1);
output_b(0x08);
delay_meds(1);
output_b(0x10);
delay_meds(1);
output_b(0x20);
delay_meds(1);
output_b(0x40);
delay_meds(1);
}
} | |
|
|
Linear Mode
