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2 changed files with 2 additions and 81 deletions
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16
software/signal_processing/add.c
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@ -4,21 +4,7 @@
int task_add_run( void * task ) {
add_config * addiere = ( add_config * ) task;
uint32_t data_channel_base = addiere->sink;
data_channel_clear( data_channel_base );
for ( uint32_t i = 0; i < DATA_CHANNEL_DEPTH; ++i )
{
float_word res;
float_word sin_val;
float_word cos_val;
data_channel_read(addiere->sources[0], &sin_val.value);
data_channel_read(addiere->sources[1], &cos_val.value);
res.value = sin_val.value + cos_val.value;
data_channel_write( data_channel_base, res.word );
}
// TODO
return 0;
}

67
software/signal_processing/crc.c
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@ -1,76 +1,11 @@
#include "system/task_crc.h"
#include "system/data_channel.h"
#include "system/float_word.h"
//#include <zlib.h> /* c-library for crc32() */
#include <stddef.h> /* for "size_t" */
#include <stdio.h>
#if 0
#define PRINT_DEBUG_VALUES
#endif
int task_crc_run( void * task ) {
/* used basic algo from and modified it: https://lxp32.github.io/docs/a-simple-example-crc32-calculation/*/
uint32_t crc32(uint32_t *crc_res, const char *s,size_t n)
{
uint32_t crc = ~(*crc_res); // always invert the input!
#ifdef PRINT_DEBUG_VALUES
printf("SIZE OF SEED, INPUT & OUTPUT: %i\n", n);
printf("SEED: %08x\n", *crc_res);
printf("INPUT: %08x\n", *(uint32_t*)s);
#endif /*PRINT_DEBUG_VALUES*/
for(size_t i=0;i<n;++i)
{
unsigned char ch=s[i];
#ifdef PRINT_DEBUG_VALUES
printf("ch: %02x\n", ch);
#endif /*PRINT_DEBUG_VALUES*/
for(size_t j=0;j<8;++j) {
uint32_t b=(ch^crc)&1;
crc>>=1;
//if(b) crc=crc^0x04C11DB7; // Polynomial representations: NORMAL
if(b) crc=crc^0xEDB88320; // Polynomial representations: REVERSED
ch>>=1;
}
}
#ifdef PRINT_DEBUG_VALUES
printf("OUTPUT: %08x\n", crc);
printf("~OUTPUT: %08x\n", ~crc);
getchar(); // just here for debugging step by step
#endif /*PRINT_DEBUG_VALUES*/
return ~crc;
}
int task_crc_run( void * task )
{
// TODO
crc_config * crc = ( crc_config * ) task;
uint32_t data_channel_base = crc->base.sink;
data_channel_clear( data_channel_base);
float_word crc_res;
float_word crc_input;
crc_res.word = crc->start;
for ( uint32_t i = 0; i < DATA_CHANNEL_DEPTH; ++i )
{
data_channel_read(crc->base.sources[0], (uint32_t*)&crc_input.value);
crc_res.word = crc32(&crc_res.word,(const void *)&crc_input, sizeof(crc_input));
}
data_channel_write( data_channel_base, crc_res.word );
return 0;
}