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Sami
Joined: 29 Oct 2014
Posts: 4
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| spi_init not defined |
 Posted: Wed Oct 29, 2014 6:36 am |
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Hey guys,
I am trying to use the SPI protocol using the pic16F887 to communicate with the port expander MCP23S17. then I would run this code into Proteus 8. but I am having a strange problem when trying to use "spi_init()". the error that i got is "Function used but not defined: ... spi_init 471 SCR=2705" here is my code, I think I am missing something.
I am new to CCS, any help would be appreciated.
CCS version 5.025
| Code: |
#include <main.h>
#include <stdlib.h>
#use spi(MASTER, CLK=PIN_C3, DI=PIN_C5, DO=PIN_C4, ENABLE=PIN_C2, BAUD=1000000, MODE=0, BITS=8, STREAM=SPI_1, MSB_FIRST)
void main()
{
set_tris_c(0x10);
output_high(PIN_C6);
output_low(PIN_C6); // Reset the port expander
delay_ms(100);
output_high(PIN_C6);
unsigned int32 baud = 0x100000;
spi_init(SPI_1, baud);
while(TRUE)
{
//TODO: User Code
}
} |
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asmallri
Joined: 12 Aug 2004
Posts: 1634
Location: Perth, Australia
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| Re: spi_init not defined |
| Posted: Wed Oct 29, 2014 8:02 am |
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| Sami wrote: | Hey guys,
I am trying to use the SPI protocol using the pic16F887 to communicate with the port expander MCP23S17. then I would run this code into Proteus 8. but I am having a strange problem when trying to use "spi_init()". the error that i got is "Function used but not defined: ... spi_init 471 SCR=2705" here is my code, I think I am missing something.
I am new to CCS, any help would be appreciated.
CCS version 5.025
| Code: |
#include <main.h>
#include <stdlib.h>
#use spi(MASTER, CLK=PIN_C3, DI=PIN_C5, DO=PIN_C4, ENABLE=PIN_C2, BAUD=1000000, MODE=0, BITS=8, STREAM=SPI_1, MSB_FIRST)
void main()
{
set_tris_c(0x10);
output_high(PIN_C6);
output_low(PIN_C6); // Reset the port expander
delay_ms(100);
output_high(PIN_C6);
unsigned int32 baud = 0x100000;
spi_init(SPI_1, baud);
while(TRUE)
{
//TODO: User Code
}
} |
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You need to look at examples of working applications.
Your are missing:
processor type
processor config (fuse) settings,
#use delay(...) specifying the CPU clock speed
You have specified the TRIS setting which is meaningless in the default mode of the compiler. If you want to specify the I/O configuration manually then you need to add the use FAST_IO directive for the port you are using.
_________________
Regards, Andrew
http://www.brushelectronics.com/software
Home of Ethernet, SD card and Encrypted Serial Bootloaders for PICs!! |
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newguy
Joined: 24 Jun 2004
Posts: 1907
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| Re: spi_init not defined |
| Posted: Wed Oct 29, 2014 8:36 am |
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| Sami wrote: | | ...Proteus 8... |
No proteus questions. See the sticky at the top of the page. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Wed Oct 29, 2014 9:14 am |
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It doesn't compile. To fix this thing, you need to do the following:
1. You have the DI and DO pins swapped in the #use spi() statement.
It could only do software SPI with those settings.
2. #use spi() defaults to software SPI unless specifically told to use
hardware. You can fix this by adding FORCE_HW as a parameter, or
by getting rid of the 3 pin definitions and specify SPI1 instead.
3. The baud parameter in spi_init() can't be a variable. It can only be
a constant. CCS will give an error if you use a variable.
This code compiles OK with vs. 5.030:
| Code: |
#include <16F886.h>
#fuses INTRC_IO, NOWDT
#use delay(clock=4M)
#include <stdlib.h>
#use spi(MASTER, SPI1, ENABLE=PIN_C2, BAUD=1000000, MODE=0, BITS=8, STREAM=SPI_1, MSB_FIRST)
void main()
{
set_tris_c(0x10);
output_high(PIN_C6);
spi_xfer(0x55);
output_low(PIN_C6); // Reset the port expander
delay_ms(100);
output_high(PIN_C6);
spi_init(SPI_1, 50000);
while(TRUE)
{
//TODO: User Code
}
} |
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Sami
Joined: 29 Oct 2014
Posts: 4
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| Posted: Wed Oct 29, 2014 2:54 pm |
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| Thanks a lot it works, really appreciated. |
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