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avitron
Joined: 26 Mar 2013
Posts: 4
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| (FIXED) need help on SPI interface 16F877A with 25LC640 |
 Posted: Tue Apr 16, 2013 5:49 pm |
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Could any one help me to find why my Proteus simulation circuit not working ? The data can not write in the EEPROM, no data can be retrieved from EEPROM.
My CCS program compiled without any error.
I'm using PCW ver. 4.140.
the 25LC640 driver is copy from:
http://www.ccsinfo.com/forum/viewtopic.php?t=42712&highlight=25lc640
Here is the EEPROM driver
| Code: |
//Hardware SPI driver for 25LC640:
#ifndef EEPROM_SELECT
#define EEPROM_SELECT PIN_C2
#define EEPROM_CLK PIN_C3
#define EEPROM_DI PIN_C5
#define EEPROM_DO PIN_C4
#endif
#define EEPROM_ADDRESS long int
#define EEPROM_SIZE 8192
void init_ext_eeprom()
{
output_high(EEPROM_SELECT);
setup_spi(SPI_MASTER|SPI_MODE_0_0|SPI_CLK_DIV_16);
}
//--------------------------------
int1 ext_eeprom_ready(void)
{
int8 data;
output_low(EEPROM_SELECT);
spi_write(0x05);
data = spi_read(0);
output_high(EEPROM_SELECT);
return(!bit_test(data, 0));
}
//--------------------------------
void write_ext_eeprom(EEPROM_ADDRESS address, BYTE data)
{
while(!ext_eeprom_ready());
output_low(EEPROM_SELECT);
spi_write(0x06);
output_high(EEPROM_SELECT);
output_low(EEPROM_SELECT);
spi_write(0x02);
spi_write(address >> 8);
spi_write(address);
spi_write(data);
output_high(EEPROM_SELECT);
}
//--------------------------------
BYTE read_ext_eeprom(EEPROM_ADDRESS address)
{
int8 data;
while(!ext_eeprom_ready());
output_low(EEPROM_SELECT);
spi_write(0x03);
spi_write(address >> 8);
spi_write(address);
data = spi_read(0);
output_high(EEPROM_SELECT);
return(data);
}
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My main program here:
| Code: |
#include <16F877A.h>
#FUSES NOWDT //No Watch Dog Timer
#FUSES HS //High speed Osc (> 4mhz for PCM/PCH)
#FUSES PUT //Power Up Timer
#FUSES NOLVP //No low voltage prgming,
#use delay(clock=20000000)
#define SPI_MODE_0_0 (SPI_L_TO_H | SPI_XMIT_L_TO_H)
#define SPI_MODE_0_1 (SPI_L_TO_H)
#define SPI_MODE_1_0 (SPI_H_TO_L)
#define SPI_MODE_1_1 (SPI_H_TO_L | SPI_XMIT_L_TO_H)
#define EEPROM_SELECT PIN_C2
#define EEPROM_CLK PIN_C3
#define EEPROM_DI PIN_C5
#define EEPROM_DO PIN_C4
#include <SPI_25LC640.c>
// define LCD pins before #include <LCD.c>
#define LCD_ENABLE_PIN PIN_E0
#define LCD_RS_PIN PIN_E1
#define LCD_RW_PIN PIN_E2
#define LCD_DATA4 PIN_D4
#define LCD_DATA5 PIN_D5
#define LCD_DATA6 PIN_D6
#define LCD_DATA7 PIN_D7
#include <LCD.c>
void main()
{
setup_adc_ports(NO_ANALOGS);
setup_comparator(NC_NC_NC_NC);
setup_adc(ADC_OFF);
setup_psp(PSP_DISABLED);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
init_ext_eeprom();
lcd_init();
int8 data, addr, read_data;
output_high(PIN_C0); // LED indicate in writing mode
for(data=0xff,addr=0x00; addr<=0x0f; --data, ++addr) {
ext_eeprom_ready();
write_ext_eeprom(addr,data);
lcd_putc("\fWriting Data...\n");
printf(lcd_putc,"%x",data);
delay_ms(5);
}
output_low(PIN_C0);
delay_ms(1500);
output_high(PIN_C1); // LED indicate in reading mode
for(addr=0x00; addr<=0x0f; ++addr) {
read_data= read_ext_eeprom(addr);
lcd_putc("\fReading Data...\n");
printf(lcd_putc,"%x",read_data);
delay_ms(150);
}
output_low(PIN_C1);
while(TRUE)
{
//TODO: User Code
}
}
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here proteus sim:
[img]
http://imageshack.us/photo/my-images/571/spi25lc640.jpg/
[/img]
Last edited by avitron on Mon Apr 22, 2013 6:02 pm; edited 1 time in total |
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temtronic
Joined: 01 Jul 2010
Posts: 9177
Location: Greensville,Ontario
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| Posted: Tue Apr 16, 2013 6:05 pm |
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simple answer...
Proteus is busted.Contact them to fix their product.
CCS C works fine with real hardware.
hth
jay |
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avitron
Joined: 26 Mar 2013
Posts: 4
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| SOLUTION FOUND |
| Posted: Wed Apr 17, 2013 4:31 pm |
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Only for simulation purpose, do it in real HW.
According to Ettore Arena from Labcenter Electronic:
| Quote: |
... that's a problem with the CCS compiler optimizer not Proteus! Add the directive #OPT 0 just before void main() and it will work fine.
I have analysed the generated assembly code and made hardware tests as well and finally posted the results over there:
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see the post under the name "ettore"
http://www.ccsinfo.com/forum/viewtopic.php?t=42712&highlight=25lc640
Last edited by avitron on Wed Apr 17, 2013 5:55 pm; edited 2 times in total |
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dyeatman
Joined: 06 Sep 2003
Posts: 1924
Location: Norman, OK
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| Posted: Wed Apr 17, 2013 5:09 pm |
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You missed the point. According to the post at the top of the forum, we
don't discuss Proteus related issues here.
Folks on this forum know those devices have worked with no problems in real
HW many times before (and with default optimization) so arguing for Proteus
here doesn't help your case.
_________________
Google and Forum Search are some of your best tools!!!! |
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avitron
Joined: 26 Mar 2013
Posts: 4
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| Posted: Wed Apr 17, 2013 5:41 pm |
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Sorry for everyone reading my post.
Here, I'm not intend to rise any argument between Proteus vs CCS.
I understand CCS codes will work on the real HW. And, I appreciated any one who contributed the codes.
I just want to know the solution of my problem to make it works, and contributed what I 'd found. |
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avitron
Joined: 26 Mar 2013
Posts: 4
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| from CCS support (Apr 22) |
| Posted: Mon Apr 22, 2013 6:04 pm |
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This message is a reply to CCS e-mail id: 3DM558
The problem you reported has been fixed and will be in the
next compiler release. |
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