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check noise at the antenna
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4df92e2655
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@ -38,6 +38,17 @@ inline uint32_t GetGraphBuffer(uint32_t indx) {
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return g_GraphBuffer[indx] + 128;
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}
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static uint32_t TexkomAVGField(void) {
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if (g_GraphTraceLen == 0)
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return 0;
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uint64_t vsum = 0;
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for (uint32_t i = 0; i < g_GraphTraceLen; i++)
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vsum += GetGraphBuffer(i);
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return vsum / g_GraphTraceLen;
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}
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static uint32_t TexkomSearchStart(uint32_t indx, uint32_t threshold) {
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// one bit length = 27, minimal noise = 60
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uint32_t lownoisectr = 0;
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@ -398,8 +409,11 @@ static int CmdHFTexkomReader(const char *Cmd) {
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uint32_t sindx = 0;
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while (sindx < samplesCount - 5) {
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sindx = TexkomSearchStart(sindx, TEXKOM_NOISE_THRESHOLD);
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if (sindx == 0 || sindx > samplesCount - 5)
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if (sindx == 0 || sindx > samplesCount - 5) {
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if (TexkomAVGField() > 30)
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PrintAndLogEx(WARNING, "Too noisy environment. Try to move the tag from the antenna a bit.");
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break;
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}
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uint32_t slen = TexkomSearchLength(sindx, TEXKOM_NOISE_THRESHOLD);
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if (slen == 0)
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