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size send buffer for RMT channel including DCC checksum byte
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@ -24,7 +24,9 @@
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#include "DCCWaveform.h" // for MAX_PACKET_SIZE
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#include "soc/gpio_sig_map.h"
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#define DATA_LEN(X) ((X)*9+1) // Each byte has one bit extra and we have one EOF marker
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// Number of bits resulting out of X bytes of DCC payload data
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// Each byte has one bit extra and at the end we have one EOF marker
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#define DATA_LEN(X) ((X)*9+1)
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#if ESP_IDF_VERSION < ESP_IDF_VERSION_VAL(4,2,0)
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#error wrong IDF version
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@ -108,7 +110,7 @@ RMTChannel::RMTChannel(byte pin, bool isMain) {
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setEOT(idle + 27); // EOT marker
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// data: max packet size today is 5 + checksum
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maxDataLen = DATA_LEN(MAX_PACKET_SIZE);
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maxDataLen = DATA_LEN(MAX_PACKET_SIZE+1); // plus checksum
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data = (rmt_item32_t*)malloc(maxDataLen*sizeof(rmt_item32_t));
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rmt_config_t config;
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