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set RMT clock to microseconds

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This commit is contained in:
Harald Barth 2021-11-19 00:03:21 +01:00
parent a69b7ee113
commit 55a789d65a
2 changed files with 5 additions and 3 deletions
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2
DCCRMT.cpp
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@ -87,7 +87,7 @@ RMTPin::RMTPin(byte pin, byte ch, byte plen) {
bzero(&config, sizeof(rmt_config_t)); bzero(&config, sizeof(rmt_config_t));
config.rmt_mode = RMT_MODE_TX; config.rmt_mode = RMT_MODE_TX;
config.channel = channel = (rmt_channel_t)ch; config.channel = channel = (rmt_channel_t)ch;
config.clk_div = 1; // use 80Mhz clock directly config.clk_div = RMT_CLOCK_DIVIDER;
config.gpio_num = (gpio_num_t)pin; config.gpio_num = (gpio_num_t)pin;
config.mem_block_num = 2; // With longest DCC packet 11 inc checksum (future expansion) config.mem_block_num = 2; // With longest DCC packet 11 inc checksum (future expansion)
// number of bits needed is 22preamble + start + // number of bits needed is 22preamble + start +

6
DCCRMT.h
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@ -23,8 +23,10 @@
#include "soc/rmt_reg.h" #include "soc/rmt_reg.h"
#include "soc/rmt_struct.h" #include "soc/rmt_struct.h"
#define DCC_1_HALFPERIOD 4640 // 1 / 80000000 * 4640 = 58us // make calculations easy and set up for microseconds
#define DCC_0_HALFPERIOD 8000 #define RMT_CLOCK_DIVIDER 80
#define DCC_1_HALFPERIOD 58 //4640 // 1 / 80000000 * 4640 = 58us
#define DCC_0_HALFPERIOD 100 //8000
class RMTPin { class RMTPin {
public: public: