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ADD: @marshmellow42 's fixex and resetread t55x7

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iceman1001 2015-11-02 20:46:17 +01:00
commit 94422fa23f
13 changed files with 113 additions and 42 deletions
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20
armsrc/lfsampling.c
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@ -252,19 +252,17 @@ uint32_t SnoopLF() {
* acquisition of T55x7 LF signal. Similart to other LF, but adjusted with @marshmellows thresholds
* the data is collected in BigBuf.
**/
void doT55x7Acquisition(void){
void doT55x7Acquisition(size_t sample_size) {
#define T55xx_SAMPLES_SIZE 12000 // 32 x 32 x 10 (32 bit times numofblock (7), times clock skip..)
#define T55xx_READ_UPPER_THRESHOLD 128+40 // 50
#define T55xx_READ_UPPER_THRESHOLD 128+40 // 40 grph
#define T55xx_READ_TOL 5
uint8_t *dest = BigBuf_get_addr();
uint16_t bufsize = BigBuf_max_traceLen();
if ( bufsize > T55xx_SAMPLES_SIZE )
bufsize = T55xx_SAMPLES_SIZE;
if ( bufsize > sample_size )
bufsize = sample_size;
//int adcval = 0;
uint16_t i = 0;
bool startFound = false;
bool highFound = false;
@ -281,7 +279,7 @@ void doT55x7Acquisition(void){
curSample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
LED_D_OFF();
// find first high sample
// skip until the first high sample above threshold
if (!startFound && curSample > T55xx_READ_UPPER_THRESHOLD) {
if (curSample > firstSample)
firstSample = curSample;
@ -291,16 +289,18 @@ void doT55x7Acquisition(void){
continue;
}
// skip until samples begin to change
// skip until first high samples begin to change
if (startFound || curSample < firstSample-T55xx_READ_TOL){
if (!startFound)
// if just found start - recover last sample
if (!startFound) {
dest[i++] = firstSample;
startFound = true;
}
// collect samples
dest[i++] = curSample;
if (i >= bufsize-1) break;
}
}
}
}