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spec
Joined: 02 Oct 2010
Posts: 4
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| read digital data by pic18f4550 |
 Posted: Sat Oct 02, 2010 11:31 am |
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Hi everyone,
I have a TDC-GP1 chip (time to digital converter: www.acam.de/fileadmin/Download/pdf/English/DB_GP1_e.pdf) used to measure ultra fast-time. I want to develop a electronics kit for some applications. I use a pic184550 to read data from TDC-GP1 chip and trans. to PC. Can you help me? How can I design ..?
Thanks!
_________________
spectroscopy
Last edited by spec on Sun Oct 03, 2010 12:45 am; edited 1 time in total |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Sat Oct 02, 2010 12:26 pm |
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You need to build or buy a demo board. Or buy a "break-out" board for
the TDC-GP1 chip, and then connect it to a PIC demo board. Then you
need to write a software driver for the TDC-GP1, using the CCS compiler.
If you are a newbie in hardware and software, this is going to be
extremely difficult. You really need to know at least some of the C
language before you begin. This TDC-GP1 project should not be your
first PIC project. Do some other work first, so you can learn the basics.
The TDC-GP1 data sheet has some generic sample C source code in it.
This could possibly be used to help you write the driver in CCS. I don't
want to do the project for you. I just wanted to tell you what you need to
do, to begin. |
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spec
Joined: 02 Oct 2010
Posts: 4
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| Posted: Sun Oct 03, 2010 1:28 am |
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| PCM programmer wrote: | You need to build or buy a demo board. Or buy a "break-out" board for
the TDC-GP1 chip, and then connect it to a PIC demo board. Then you
need to write a software driver for the TDC-GP1, using the CCS compiler.
If you are a newbie in hardware and software, this is going to be
extremely difficult. You really need to know at least some of the C
language before you begin. This TDC-GP1 project should not be your
first PIC project. Do some other work first, so you can learn the basics.
The TDC-GP1 data sheet has some generic sample C source code in it.
This could possibly be used to help you write the driver in CCS. I don't
want to do the project for you. I just wanted to tell you what you need to
do, to begin. |
Thank you for your support. I have developed a test boad, this link are SCH. and PCB files in DXP2004 protel: http://www.megaupload.com/?d=L7VX2UBM
I'm also learning some projects in CCS with pic18f4550 such as led blink, communication with rs232 standard by this test boad. But I don't know that how to configure control registers of TDC-GP1 to read data. Can you suggest something to help me?
Thanks so much!
_________________
spectroscopy |
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spec
Joined: 02 Oct 2010
Posts: 4
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| Posted: Thu Oct 07, 2010 11:28 pm |
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Hi every one,
I have made test board and program for this project. And I'm trying to test program, I want to create two pulses from pin C0 and C1 (C1 delay 10us compare with C0) but it's not run:
| Code: |
#include "C:\gpt2\main.h"
int8 valid, nk0, vk0;
int16 nk1, vk1, t;
void main()
{
setup_adc_ports(NO_ANALOGS|VSS_VDD);
setup_adc(ADC_CLOCK_DIV_2);
setup_psp(PSP_DISABLED);
setup_spi(SPI_SS_DISABLED);
setup_wdt(WDT_OFF);
setup_timer_0(RTCC_INTERNAL);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_comparator(NC_NC_NC_NC);
setup_vref(FALSE);
//Setup_Oscillator parameter not selected from Intr Oscillator Config tab
// TODO: USER CODE!!
while (true)
{
while(true)
{
output_high(PIN_C0);
delay_us(10);
output_high(PIN_C1);
output_low(PIN_C0);
delay_us(10);
break;
}
output_toggle(pin_c2);
delay_ms(100);
Output_high(pin_a0);
Output_high(pin_a1);
Output_low(pin_a2);
Output_high(pin_a3);
Output_d(0x07);
output_low(pin_b0);
valid=0;
output_high(pin_b1);
output_low(pin_b2);
output_low(pin_b3);
output_low(pin_b4);
while(valid==0)
{
valid=pin_b0;
}
Output_low(pin_a0);
Output_low(pin_a1);
Output_low(pin_a2);
Output_low(pin_a3);
nk0=input_d();
nk1=input_d();
vk0=input_d();
vk1=input_d();
vk1=vk1*256;
vk1=vk1|vk0;
nk1=nk1*256;
nk1=nk1|nk0;
t = 83.333*((float)(vk1)+(float)(nk1)/65536.0);
t = output_d(t);
printf("gia tri la: %lu\n", t);
}
}
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can you help me!
Thanks so much!
_________________
spectroscopy |
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tae
Joined: 15 Jan 2010
Posts: 11
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| Posted: Fri Oct 08, 2010 5:15 am |
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| Code: | while(true)
{
output_high(PIN_C0);
delay_us(10);
output_high(PIN_C1);
output_low(PIN_C0);
delay_us(10);
break;
} |
A rather strange use of "While" 
| Code: | while(valid==0)
{
valid=pin_b0;
}
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And what's this ?? |
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spec
Joined: 02 Oct 2010
Posts: 4
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| Posted: Fri Oct 08, 2010 11:58 pm |
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| tae wrote: | | Code: | while(true)
{
output_high(PIN_C0);
delay_us(10);
output_high(PIN_C1);
output_low(PIN_C0);
delay_us(10);
break;
} |
A rather strange use of "While"
| Code: | while(valid==0)
{
valid=pin_b0;
}
|
And what's this ?? |
Thanks, Pin B0 connect with Int.flag of TDC-GP1 chip (when Int.flag in high level, TDC-GP1 allow data to read from register), hence I use while loop this.
_________________
spectroscopy |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19548
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| Posted: Sat Oct 09, 2010 2:55 am |
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The problem is the syntax.
'PIN_B0', is just a _number_, used as a reference to address a particular pin. To read a value _from_ 'PIN_B0', requires the used of an 'input' statement. Then, there is no point at all in copying the value into another register.
So:
| Code: |
while (input(PIN_B0))==0) ;
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Waits for PIN_B0 to go high. What you currently have, will never wait.
Best Wishes |
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