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ADD: added the "hf snoop" patch original from @Enio, rearranged by @Etmatrix.

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ADD:  added the "t55x7" refactoring by @marshmellow42
This commit is contained in:
iceman1001 2015-10-27 21:47:21 +01:00
commit 1d0ccbe04b
24 changed files with 704 additions and 604 deletions
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36
armsrc/lfsampling.c
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@ -255,9 +255,8 @@ uint32_t SnoopLF() {
void doT55x7Acquisition(void){
#define T55xx_SAMPLES_SIZE 12000 // 32 x 32 x 10 (32 bit times numofblock (7), times clock skip..)
#define T55xx_UPPER_THRESHOLD 128+40 // 50
#define T55xx_READ_UPPER_THRESHOLD 128+40 // 50
#define T55xx_READ_TOL 5
#define T55xx_LOWER_THRESHOLD 128-40 //-50
uint8_t *dest = BigBuf_get_addr();
uint16_t bufsize = BigBuf_max_traceLen();
@ -265,40 +264,43 @@ void doT55x7Acquisition(void){
if ( bufsize > T55xx_SAMPLES_SIZE )
bufsize = T55xx_SAMPLES_SIZE;
//int adcval = 0;
uint16_t i = 0;
bool startFound = false;
bool highFound = false;
uint8_t sample = 0;
uint8_t curSample = 0;
uint8_t firstSample = 0;
while(!BUTTON_PRESS()) {
uint16_t skipCnt = 0;
while(!BUTTON_PRESS() && skipCnt<1000) {
WDT_HIT();
if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
AT91C_BASE_SSC->SSC_THR = 0x00;
AT91C_BASE_SSC->SSC_THR = 0x43;
LED_D_ON();
}
if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY) {
sample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
curSample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
LED_D_OFF();
// find first high sample
if (!startFound && sample > T55xx_UPPER_THRESHOLD) {
if (sample > firstSample)
firstSample = sample;
highFound = TRUE;
if (!startFound && curSample > T55xx_READ_UPPER_THRESHOLD) {
if (curSample > firstSample)
firstSample = curSample;
highFound = true;
} else if (!highFound) {
skipCnt++;
continue;
}
// skip until samples begin to change
if (startFound || sample < firstSample - T55xx_READ_TOL){
if (startFound || curSample < firstSample-T55xx_READ_TOL){
if (!startFound)
dest[i++] = firstSample;
startFound = TRUE;
dest[i++] = sample;
// exit condition.
if (i >= bufsize) break;
startFound = true;
dest[i++] = curSample;
if (i >= bufsize-1) break;
}
}
}
}
}