136 lines
4.9 KiB
C
136 lines
4.9 KiB
C
|
|
/******************************************************************************/
|
|
/*** include files ***/
|
|
/******************************************************************************/
|
|
|
|
#include "rmt_pulse.h"
|
|
|
|
#include <driver/rmt.h>
|
|
|
|
/******************************************************************************/
|
|
/*** macro definitions ***/
|
|
/******************************************************************************/
|
|
|
|
/******************************************************************************/
|
|
/*** type definitions ***/
|
|
/******************************************************************************/
|
|
|
|
/******************************************************************************/
|
|
/*** local function prototypes ***/
|
|
/******************************************************************************/
|
|
|
|
/**
|
|
* @brief Remote peripheral interrupt. Used to signal when transmission is done.
|
|
*/
|
|
// static void IRAM_ATTR rmt_interrupt_handler(void *arg);
|
|
|
|
/******************************************************************************/
|
|
/*** exported variables ***/
|
|
/******************************************************************************/
|
|
|
|
/******************************************************************************/
|
|
/*** local variables ***/
|
|
/******************************************************************************/
|
|
|
|
// static intr_handle_t gRMT_intr_handle = NULL;
|
|
|
|
/**
|
|
* @brief the RMT channel configuration object
|
|
*/
|
|
static rmt_config_t row_rmt_config;
|
|
|
|
/**
|
|
* @brief keep track of wether the current pulse is ongoing
|
|
*/
|
|
// static volatile bool rmt_tx_done = true;
|
|
|
|
/******************************************************************************/
|
|
/*** exported functions ***/
|
|
/******************************************************************************/
|
|
|
|
void rmt_pulse_init(gpio_num_t pin)
|
|
{
|
|
row_rmt_config.rmt_mode = RMT_MODE_TX;
|
|
// currently hardcoded: use channel 0
|
|
row_rmt_config.channel = RMT_CHANNEL_1;
|
|
|
|
row_rmt_config.gpio_num = pin;
|
|
row_rmt_config.mem_block_num = 2;
|
|
|
|
// Divide 80MHz APB Clock by 8 -> .1us resolution delay
|
|
row_rmt_config.clk_div = 8;
|
|
|
|
row_rmt_config.tx_config.loop_en = false;
|
|
row_rmt_config.tx_config.carrier_en = false;
|
|
row_rmt_config.tx_config.carrier_level = RMT_CARRIER_LEVEL_LOW;
|
|
row_rmt_config.tx_config.idle_level = RMT_IDLE_LEVEL_LOW;
|
|
row_rmt_config.tx_config.idle_output_en = true;
|
|
|
|
// #if ESP_IDF_VERSION_MAJOR >= 4
|
|
// rmt_isr_register(rmt_interrupt_handler, 0,
|
|
// ESP_INTR_FLAG_LEVEL3, &gRMT_intr_handle);
|
|
// #else
|
|
// esp_intr_alloc(ETS_RMT_INTR_SOURCE, ESP_INTR_FLAG_LEVEL3,
|
|
// rmt_interrupt_handler, 0, &gRMT_intr_handle);
|
|
// #endif
|
|
|
|
rmt_config(&row_rmt_config);
|
|
rmt_driver_install(RMT_CHANNEL_1, 0, 0);
|
|
// rmt_set_tx_intr_en(row_rmt_config.channel, true);
|
|
}
|
|
|
|
|
|
void IRAM_ATTR pulse_ckv_ticks(uint16_t high_time_ticks,
|
|
uint16_t low_time_ticks, bool wait)
|
|
{
|
|
// while (!rmt_tx_done) ;
|
|
|
|
rmt_item32_t rmt_mem_ptr;
|
|
if (high_time_ticks > 0)
|
|
{
|
|
rmt_mem_ptr.level0 = 1;
|
|
rmt_mem_ptr.duration0 = high_time_ticks;
|
|
rmt_mem_ptr.level1 = 0;
|
|
rmt_mem_ptr.duration1 = low_time_ticks;
|
|
}
|
|
else
|
|
{
|
|
rmt_mem_ptr.level0 = 1;
|
|
rmt_mem_ptr.duration0 = low_time_ticks;
|
|
rmt_mem_ptr.level1 = 0;
|
|
rmt_mem_ptr.duration1 = 0;
|
|
}
|
|
// RMTMEM.chan[row_rmt_config.channel].data32[1].val = 0;
|
|
// rmt_tx_done = false;
|
|
// RMT.conf_ch[row_rmt_config.channel].conf1.mem_rd_rst = 1;
|
|
// RMT.conf_ch[row_rmt_config.channel].conf1.mem_owner = RMT_MEM_OWNER_TX;
|
|
// RMT.conf_ch[row_rmt_config.channel].conf1.tx_start = 1;
|
|
rmt_write_items(row_rmt_config.channel, &rmt_mem_ptr, 1, wait);
|
|
// while (wait && !rmt_tx_done) ;
|
|
}
|
|
|
|
|
|
void IRAM_ATTR pulse_ckv_us(uint16_t high_time_us, uint16_t low_time_us, bool wait)
|
|
{
|
|
pulse_ckv_ticks(10 * high_time_us, 10 * low_time_us, wait);
|
|
}
|
|
|
|
|
|
// bool IRAM_ATTR rmt_busy()
|
|
// {
|
|
// return !rmt_tx_done;
|
|
// }
|
|
|
|
/******************************************************************************/
|
|
/*** local functions ***/
|
|
/******************************************************************************/
|
|
|
|
// static void IRAM_ATTR rmt_interrupt_handler(void *arg)
|
|
// {
|
|
// rmt_tx_done = true;
|
|
// RMT.int_clr.val = RMT.int_st.val;
|
|
// }
|
|
|
|
/******************************************************************************/
|
|
/*** END OF FILE ***/
|
|
/******************************************************************************/ |