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size send buffer for RMT channel including DCC checksum byte

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This commit is contained in:
Harald Barth 2022-08-05 15:16:43 +02:00
parent 704fabd1a4
commit 5430711672
1 changed files with 4 additions and 2 deletions
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6
DCCRMT.cpp
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@ -24,7 +24,9 @@
#include "DCCWaveform.h" // for MAX_PACKET_SIZE
#include "soc/gpio_sig_map.h"
#define DATA_LEN(X) ((X)*9+1) // Each byte has one bit extra and we have one EOF marker
// Number of bits resulting out of X bytes of DCC payload data
// Each byte has one bit extra and at the end we have one EOF marker
#define DATA_LEN(X) ((X)*9+1)
#if ESP_IDF_VERSION < ESP_IDF_VERSION_VAL(4,2,0)
#error wrong IDF version
@ -108,7 +110,7 @@ RMTChannel::RMTChannel(byte pin, bool isMain) {
setEOT(idle + 27); // EOT marker
// data: max packet size today is 5 + checksum
maxDataLen = DATA_LEN(MAX_PACKET_SIZE);
maxDataLen = DATA_LEN(MAX_PACKET_SIZE+1); // plus checksum
data = (rmt_item32_t*)malloc(maxDataLen*sizeof(rmt_item32_t));
rmt_config_t config;