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Reclaim more than 19K of ARM flash memory.

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- added compiler options -fdata-sections and -ffunction-sections (thanks to iceman for the hint)
- removed float operations from common/lfdemod.c to avoid adding float libraries to the ARM os image
- moved the fpga images to the data section to avoid reserving unused space for a separate section
This commit is contained in:
pwpiwi 2015-03-31 08:01:23 +02:00
commit e335ca2846
5 changed files with 28 additions and 39 deletions
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28
common/lfdemod.c
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@ -36,8 +36,8 @@ int getHiLo(uint8_t *BitStream, size_t size, int *high, int *low, uint8_t fuzzHi
if (BitStream[i] < *low) *low = BitStream[i];
}
if (*high < 123) return -1; // just noise
*high = (int)(((*high-128)*(((float)fuzzHi)/100))+128);
*low = (int)(((*low-128)*(((float)fuzzLo)/100))+128);
*high = ((*high-128)*fuzzHi + 12800)/100;
*low = ((*low-128)*fuzzLo + 12800)/100;
return 1;
}
@ -639,12 +639,6 @@ size_t fsk_wave_demod(uint8_t * dest, size_t size, uint8_t fchigh, uint8_t fclow
return numBits; //Actually, it returns the number of bytes, but each byte represents a bit: 1 or 0
}
uint32_t myround2(float f)
{
if (f >= 2000) return 2000;//something bad happened
return (uint32_t) (f + (float)0.5);
}
//translate 11111100000 to 10
size_t aggregate_bits(uint8_t *dest, size_t size, uint8_t rfLen, uint8_t maxConsequtiveBits,
uint8_t invert, uint8_t fchigh, uint8_t fclow)
@ -653,8 +647,6 @@ size_t aggregate_bits(uint8_t *dest, size_t size, uint8_t rfLen, uint8_t maxCons
uint32_t idx=0;
size_t numBits=0;
uint32_t n=1;
float lowWaves = (((float)(rfLen))/((float)fclow));
float highWaves = (((float)(rfLen))/((float)fchigh));
for( idx=1; idx < size; idx++) {
if (dest[idx]==lastval) {
@ -664,20 +656,20 @@ size_t aggregate_bits(uint8_t *dest, size_t size, uint8_t rfLen, uint8_t maxCons
n++;
//if lastval was 1, we have a 1->0 crossing
if (dest[idx-1]==1) {
if (!numBits && n < (uint8_t)lowWaves) {
if (!numBits && n < rfLen/fclow) {
n=0;
lastval = dest[idx];
continue;
}
n=myround2(((float)n)/lowWaves);
n = (n * fclow + rfLen/2) / rfLen;
} else {// 0->1 crossing
//test first bitsample too small
if (!numBits && n < (uint8_t)highWaves) {
if (!numBits && n < rfLen/fchigh) {
n=0;
lastval = dest[idx];
continue;
}
n = myround2(((float)n)/highWaves); //-1 for fudge factor
n = (n * fchigh + rfLen/2) / rfLen; //-1 for fudge factor
}
if (n == 0) n = 1;
@ -695,11 +687,11 @@ size_t aggregate_bits(uint8_t *dest, size_t size, uint8_t rfLen, uint8_t maxCons
}//end for
// if valid extra bits at the end were all the same frequency - add them in
if (n > lowWaves && n > highWaves) {
if (n > rfLen/fclow && n > rfLen/fchigh) {
if (dest[idx-2]==1) {
n=myround2((float)(n+1)/((float)(rfLen)/(float)fclow));
} else {
n=myround2((float)(n+1)/((float)(rfLen-1)/(float)fchigh)); //-1 for fudge factor
n = ((n+1) * fclow + rfLen/2) / rfLen;
} else {// 0->1 crossing
n = ((n+1) * fchigh + (rfLen-1)/2) / (rfLen-1); //-1 for fudge factor
}
memset(dest, dest[idx-1]^invert , n);
numBits += n;