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Martin525
Joined: 23 Aug 2015
Posts: 3
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| Problem with write_program_memory |
 Posted: Sun Aug 23, 2015 7:15 am |
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Hi
I'm trying to write an I2C Bootloader for the PIC16F1503, but I have a problem with the function write_program_memory().
Here is my source code just to test this function:
| Code: |
#include <16F1503.h>
#device ADC=16
#FUSES NOWDT
#FUSES NOBROWNOUT
#FUSES NOLVP
#use delay(internal=16MHz)
#use FIXED_IO( A_outputs=PIN_A0 )
#define LED PIN_A0
#use i2c(Slave,Fast,sda=PIN_C1,scl=PIN_C0,address=0xA0)
#use rs232(baud=9600, xmit=PIN_C4,rcv=PIN_C5)
#ORG 0x700, 0x7FF {}
int8 buffer [32];
int8 to_write [32] = {0xAB,0xAB,0xAB,0xAB,0xAB,0xAB,0xAB,0xAB,0xAB,0xAB,0xAB,0xAB,0xAB,0xAB,0xAB,0xAB};
int16 addr = 0x700;
void main()
{
printf("Write Program Memory Test");
int i =0 ;
printf("\n\rBefore: \n\r");
read_program_memory(addr,&buffer,32);
for(i=0;i<32;i++){
printf("%X " , buffer[i]);
}
write_program_memory(addr , &to_write,32);
printf("\n\r");
printf("\n\rAfter: \n\r");
read_program_memory(addr,&buffer,32);
for(i=0;i<32;i++){
printf("%X " , buffer[i]);
}
printf("\n\r");
while(1)
{ }
}
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And here the output of the serial port:
| Code: | Write Program Memory Test
Before:
FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F
After:
FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F FF 3F
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I thought this code should change at least anything.
But it doesn't change anything, I can't find the problem, so some help would be appreciated. |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19552
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| Posted: Sun Aug 23, 2015 10:35 am |
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Repeat five times. Compiler version?....
It's possible (probable) that the supplied code may not work. Quite a few compilers have faults in their code for this.
Have a look at this thread:
<http://www.ccsinfo.com/forum/viewtopic.php?t=54018&highlight=mywriteprogrammemory>
Where I posted a 'from the data sheet' version of write_program_memory.
However also notice that the primary problem was that the chip was write protected..... |
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Martin525
Joined: 23 Aug 2015
Posts: 3
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| Posted: Sun Aug 23, 2015 11:22 am |
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Thanks for your help.
Your Function is doing a great job. |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19552
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| Posted: Sun Aug 23, 2015 1:46 pm |
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Good.
What compiler version though?.
If it is a 'current' compiler, this needs to be reported, so tell us please. |
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ELCouz
Joined: 18 Jul 2007
Posts: 427
Location: Montreal,Quebec
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Martin525
Joined: 23 Aug 2015
Posts: 3
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| Posted: Mon Aug 24, 2015 5:32 am |
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| My Compiler Version is 5.007, 27506. |
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ELCouz
Joined: 18 Jul 2007
Posts: 427
Location: Montreal,Quebec
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| Posted: Mon Aug 24, 2015 5:37 am |
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| Martin525 wrote: | | My Compiler Version is 5.007, 27506. |
Unless you have a specific reason ... please upgrade to 5.048.
5.007 is an early release (Beta) of v5 compiler!
_________________
Regards,
Laurent
-----------
Here's my first visual theme for the CCS C Compiler. Enjoy! |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19552
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| Posted: Mon Aug 24, 2015 5:38 am |
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| OK. 5.007, is a very early V5 compiler. Really still likely to be a bit 'beta'. Not surprising it has problems then. |
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