mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
0eb59844bb
1. Rename api from rmt_get_ringbuf_handler to rmt_get_ringbuf_handle (Github Issue #274) 2. doxygen param rename 3. change API rmt_wait_tx_done to specify maximum waiting time 4.Change return type of rmt_wait_tx_done API from bool to esp_err_t 5. update doc
798 lines
23 KiB
C
798 lines
23 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
|
||
//
|
||
// Licensed under the Apache License, Version 2.0 (the "License");
|
||
// you may not use this file except in compliance with the License.
|
||
// You may obtain a copy of the License at
|
||
|
||
// http://www.apache.org/licenses/LICENSE-2.0
|
||
//
|
||
// Unless required by applicable law or agreed to in writing, software
|
||
// distributed under the License is distributed on an "AS IS" BASIS,
|
||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
// See the License for the specific language governing permissions and
|
||
// limitations under the License.
|
||
|
||
#ifndef _DRIVER_RMT_CTRL_H_
|
||
#define _DRIVER_RMT_CTRL_H_
|
||
#include "esp_err.h"
|
||
#include "soc/rmt_reg.h"
|
||
#include "soc/dport_reg.h"
|
||
#include "soc/rmt_struct.h"
|
||
#include "freertos/FreeRTOS.h"
|
||
#include "freertos/semphr.h"
|
||
#include "freertos/xtensa_api.h"
|
||
#include "freertos/ringbuf.h"
|
||
#include "driver/gpio.h"
|
||
#include "driver/periph_ctrl.h"
|
||
|
||
#ifdef __cplusplus
|
||
extern "C" {
|
||
#endif
|
||
|
||
#define RMT_MEM_BLOCK_BYTE_NUM (256)
|
||
#define RMT_MEM_ITEM_NUM (RMT_MEM_BLOCK_BYTE_NUM/4)
|
||
|
||
typedef enum {
|
||
RMT_CHANNEL_0=0, /*!< RMT Channel0 */
|
||
RMT_CHANNEL_1, /*!< RMT Channel1 */
|
||
RMT_CHANNEL_2, /*!< RMT Channel2 */
|
||
RMT_CHANNEL_3, /*!< RMT Channel3 */
|
||
RMT_CHANNEL_4, /*!< RMT Channel4 */
|
||
RMT_CHANNEL_5, /*!< RMT Channel5 */
|
||
RMT_CHANNEL_6, /*!< RMT Channel6 */
|
||
RMT_CHANNEL_7, /*!< RMT Channel7 */
|
||
RMT_CHANNEL_MAX
|
||
} rmt_channel_t;
|
||
|
||
typedef enum {
|
||
RMT_MEM_OWNER_TX = 0, /*!< RMT RX mode, RMT transmitter owns the memory block*/
|
||
RMT_MEM_OWNER_RX = 1, /*!< RMT RX mode, RMT receiver owns the memory block*/
|
||
RMT_MEM_OWNER_MAX,
|
||
}rmt_mem_owner_t;
|
||
|
||
typedef enum {
|
||
RMT_BASECLK_REF = 0, /*!< RMT source clock system reference tick, 1MHz by default(Not supported in this version) */
|
||
RMT_BASECLK_APB, /*!< RMT source clock is APB CLK, 80Mhz by default */
|
||
RMT_BASECLK_MAX,
|
||
} rmt_source_clk_t;
|
||
|
||
typedef enum {
|
||
RMT_DATA_MODE_FIFO = 0, /*<! RMT memory access in FIFO mode */
|
||
RMT_DATA_MODE_MEM = 1, /*<! RMT memory access in memory mode */
|
||
RMT_DATA_MODE_MAX,
|
||
} rmt_data_mode_t;
|
||
|
||
typedef enum {
|
||
RMT_MODE_TX=0, /*!< RMT TX mode */
|
||
RMT_MODE_RX, /*!< RMT RX mode */
|
||
RMT_MODE_MAX
|
||
} rmt_mode_t;
|
||
|
||
typedef enum {
|
||
RMT_IDLE_LEVEL_LOW=0, /*!< RMT TX idle level: low Level */
|
||
RMT_IDLE_LEVEL_HIGH, /*!< RMT TX idle level: high Level */
|
||
RMT_IDLE_LEVEL_MAX,
|
||
} rmt_idle_level_t;
|
||
|
||
typedef enum {
|
||
RMT_CARRIER_LEVEL_LOW=0, /*!< RMT carrier wave is modulated for low Level output */
|
||
RMT_CARRIER_LEVEL_HIGH, /*!< RMT carrier wave is modulated for high Level output */
|
||
RMT_CARRIER_LEVEL_MAX
|
||
} rmt_carrier_level_t;
|
||
|
||
/**
|
||
* @brief Data struct of RMT TX configure parameters
|
||
*/
|
||
typedef struct {
|
||
bool loop_en; /*!< RMT loop output mode*/
|
||
uint32_t carrier_freq_hz; /*!< RMT carrier frequency */
|
||
uint8_t carrier_duty_percent; /*!< RMT carrier duty (%) */
|
||
rmt_carrier_level_t carrier_level; /*!< RMT carrier level */
|
||
bool carrier_en; /*!< RMT carrier enable */
|
||
rmt_idle_level_t idle_level; /*!< RMT idle level */
|
||
bool idle_output_en; /*!< RMT idle level output enable*/
|
||
}rmt_tx_config_t;
|
||
|
||
/**
|
||
* @brief Data struct of RMT RX configure parameters
|
||
*/
|
||
typedef struct {
|
||
bool filter_en; /*!< RMT receiver filer enable*/
|
||
uint8_t filter_ticks_thresh; /*!< RMT filter tick number */
|
||
uint16_t idle_threshold; /*!< RMT RX idle threshold */
|
||
}rmt_rx_config_t;
|
||
|
||
/**
|
||
* @brief Data struct of RMT configure parameters
|
||
*/
|
||
typedef struct {
|
||
rmt_mode_t rmt_mode; /*!< RMT mode: transmitter or receiver */
|
||
rmt_channel_t channel; /*!< RMT channel */
|
||
uint8_t clk_div; /*!< RMT channel counter divider */
|
||
gpio_num_t gpio_num; /*!< RMT GPIO number */
|
||
uint8_t mem_block_num; /*!< RMT memory block number */
|
||
union{
|
||
rmt_tx_config_t tx_config; /*!< RMT TX parameter */
|
||
rmt_rx_config_t rx_config; /*!< RMT RX parameter */
|
||
};
|
||
} rmt_config_t;
|
||
|
||
typedef intr_handle_t rmt_isr_handle_t;
|
||
|
||
/**
|
||
* @brief Set RMT clock divider, channel clock is divided from source clock.
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @param div_cnt RMT counter clock divider
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_set_clk_div(rmt_channel_t channel, uint8_t div_cnt);
|
||
|
||
/**
|
||
* @brief Get RMT clock divider, channel clock is divided from source clock.
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @param div_cnt pointer to accept RMT counter divider
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_get_clk_div(rmt_channel_t channel, uint8_t* div_cnt);
|
||
|
||
/**
|
||
* @brief Set RMT RX idle threshold value
|
||
*
|
||
* In receive mode, when no edge is detected on the input signal
|
||
* for longer than idle_thres channel clock cycles,
|
||
* the receive process is finished.
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @param thresh RMT RX idle threshold
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_set_rx_idle_thresh(rmt_channel_t channel, uint16_t thresh);
|
||
|
||
/**
|
||
* @brief Get RMT idle threshold value.
|
||
*
|
||
* In receive mode, when no edge is detected on the input signal
|
||
* for longer than idle_thres channel clock cycles,
|
||
* the receive process is finished.
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @param thresh pointer to accept RMT RX idle threshold value
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_get_rx_idle_thresh(rmt_channel_t channel, uint16_t *thresh);
|
||
|
||
/**
|
||
* @brief Set RMT memory block number for RMT channel
|
||
*
|
||
* This function is used to configure the amount of memory blocks allocated to channel n
|
||
* The 8 channels share a 512x32-bit RAM block which can be read and written
|
||
* by the processor cores over the APB bus, as well as read by the transmitters
|
||
* and written by the receivers.
|
||
* The RAM address range for channel n is start_addr_CHn to end_addr_CHn, which are defined by:
|
||
* Memory block start address is RMT_CHANNEL_MEM(n) (in soc/rmt_reg.h),
|
||
* that is, start_addr_chn = RMT base address + 0x800 + 64 ∗ 4 ∗ n, and
|
||
* end_addr_chn = RMT base address + 0x800 + 64 ∗ 4 ∗ n + 64 ∗ 4 ∗ RMT_MEM_SIZE_CHn mod 512 ∗ 4
|
||
* @note
|
||
* If memory block number of one channel is set to a value greater than 1, this channel will occupy the memory
|
||
* block of the next channel.
|
||
* Channel0 can use at most 8 blocks of memory, accordingly channel7 can only use one memory block.
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @param rmt_mem_num RMT RX memory block number, one block has 64 * 32 bits.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_set_mem_block_num(rmt_channel_t channel, uint8_t rmt_mem_num);
|
||
|
||
/**
|
||
* @brief Get RMT memory block number
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @param rmt_mem_num Pointer to accept RMT RX memory block number
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_get_mem_block_num(rmt_channel_t channel, uint8_t* rmt_mem_num);
|
||
|
||
/**
|
||
* @brief Configure RMT carrier for TX signal.
|
||
*
|
||
* Set different values for carrier_high and carrier_low to set different frequency of carrier.
|
||
* The unit of carrier_high/low is the source clock tick, not the divided channel counter clock.
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @param carrier_en Whether to enable output carrier.
|
||
*
|
||
* @param high_level High level duration of carrier
|
||
*
|
||
* @param low_level Low level duration of carrier.
|
||
*
|
||
* @param carrier_level Configure the way carrier wave is modulated for channel0-7.
|
||
*
|
||
* 1'b1:transmit on low output level
|
||
*
|
||
* 1'b0:transmit on high output level
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_set_tx_carrier(rmt_channel_t channel, bool carrier_en, uint16_t high_level, uint16_t low_level, rmt_carrier_level_t carrier_level);
|
||
|
||
/**
|
||
* @brief Set RMT memory in low power mode.
|
||
*
|
||
* Reduce power consumed by memory. 1:memory is in low power state.
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @param pd_en RMT memory low power enable.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_set_mem_pd(rmt_channel_t channel, bool pd_en);
|
||
|
||
/**
|
||
* @brief Get RMT memory low power mode.
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @param pd_en Pointer to accept RMT memory low power mode.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_get_mem_pd(rmt_channel_t channel, bool* pd_en);
|
||
|
||
/**
|
||
* @brief Set RMT start sending data from memory.
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @param tx_idx_rst Set true to reset memory index for TX.
|
||
* Otherwise, transmitter will continue sending from the last index in memory.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_tx_start(rmt_channel_t channel, bool tx_idx_rst);
|
||
|
||
/**
|
||
* @brief Set RMT stop sending.
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_tx_stop(rmt_channel_t channel);
|
||
|
||
/**
|
||
* @brief Set RMT start receiving data.
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @param rx_idx_rst Set true to reset memory index for receiver.
|
||
* Otherwise, receiver will continue receiving data to the last index in memory.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_rx_start(rmt_channel_t channel, bool rx_idx_rst);
|
||
|
||
/**
|
||
* @brief Set RMT stop receiving data.
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_rx_stop(rmt_channel_t channel);
|
||
|
||
/**
|
||
* @brief Reset RMT TX/RX memory index.
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_memory_rw_rst(rmt_channel_t channel);
|
||
|
||
/**
|
||
* @brief Set RMT memory owner.
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @param owner To set when the transmitter or receiver can process the memory of channel.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_set_memory_owner(rmt_channel_t channel, rmt_mem_owner_t owner);
|
||
|
||
/**
|
||
* @brief Get RMT memory owner.
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @param owner Pointer to get memory owner.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_get_memory_owner(rmt_channel_t channel, rmt_mem_owner_t* owner);
|
||
|
||
/**
|
||
* @brief Set RMT tx loop mode.
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @param loop_en To enable RMT transmitter loop sending mode.
|
||
*
|
||
* If set true, transmitter will continue sending from the first data
|
||
* to the last data in channel0-7 again and again.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_set_tx_loop_mode(rmt_channel_t channel, bool loop_en);
|
||
|
||
/**
|
||
* @brief Get RMT tx loop mode.
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @param loop_en Pointer to accept RMT transmitter loop sending mode.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_get_tx_loop_mode(rmt_channel_t channel, bool* loop_en);
|
||
|
||
/**
|
||
* @brief Set RMT RX filter.
|
||
*
|
||
* In receive mode, channel0-7 will ignore input pulse when the pulse width is smaller than threshold.
|
||
* Counted in source clock, not divided counter clock.
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @param rx_filter_en To enable RMT receiver filter.
|
||
*
|
||
* @param thresh Threshold of pulse width for receiver.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_set_rx_filter(rmt_channel_t channel, bool rx_filter_en, uint8_t thresh);
|
||
|
||
/**
|
||
* @brief Set RMT source clock
|
||
*
|
||
* RMT module has two source clock:
|
||
* 1. APB clock which is 80Mhz
|
||
* 2. REF tick clock, which would be 1Mhz( not supported in this version).
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @param base_clk To choose source clock for RMT module.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_set_source_clk(rmt_channel_t channel, rmt_source_clk_t base_clk);
|
||
|
||
/**
|
||
* @brief Get RMT source clock
|
||
*
|
||
* RMT module has two source clock:
|
||
* 1. APB clock which is 80Mhz
|
||
* 2. REF tick clock, which would be 1Mhz( not supported in this version).
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @param src_clk Pointer to accept source clock for RMT module.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_get_source_clk(rmt_channel_t channel, rmt_source_clk_t* src_clk);
|
||
|
||
/**
|
||
* @brief Set RMT idle output level for transmitter
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @param idle_out_en To enable idle level output.
|
||
*
|
||
* @param level To set the output signal's level for channel0-7 in idle state.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_set_idle_level(rmt_channel_t channel, bool idle_out_en, rmt_idle_level_t level);
|
||
|
||
/**
|
||
* @brief Get RMT status
|
||
*
|
||
* @param channel RMT channel (0-7)
|
||
*
|
||
* @param status Pointer to accept channel status.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_get_status(rmt_channel_t channel, uint32_t* status);
|
||
|
||
/**
|
||
* @brief Set mask value to RMT interrupt enable register.
|
||
*
|
||
* @param mask Bit mask to set to the register
|
||
*
|
||
*/
|
||
void rmt_set_intr_enable_mask(uint32_t mask);
|
||
|
||
/**
|
||
* @brief Clear mask value to RMT interrupt enable register.
|
||
*
|
||
* @param mask Bit mask to clear the register
|
||
*
|
||
*/
|
||
void rmt_clr_intr_enable_mask(uint32_t mask);
|
||
|
||
/**
|
||
* @brief Set RMT RX interrupt enable
|
||
*
|
||
* @param channel RMT channel (0 - 7)
|
||
*
|
||
* @param en enable or disable RX interrupt.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_set_rx_intr_en(rmt_channel_t channel, bool en);
|
||
|
||
/**
|
||
* @brief Set RMT RX error interrupt enable
|
||
*
|
||
* @param channel RMT channel (0 - 7)
|
||
*
|
||
* @param en enable or disable RX err interrupt.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_set_err_intr_en(rmt_channel_t channel, bool en);
|
||
|
||
/**
|
||
* @brief Set RMT TX interrupt enable
|
||
*
|
||
* @param channel RMT channel (0 - 7)
|
||
*
|
||
* @param en enable or disable TX interrupt.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_set_tx_intr_en(rmt_channel_t channel, bool en);
|
||
|
||
/**
|
||
* @brief Set RMT TX threshold event interrupt enable
|
||
*
|
||
* Causes an interrupt when a threshold number of items have been transmitted.
|
||
*
|
||
* @param channel RMT channel (0 - 7)
|
||
*
|
||
* @param en enable or disable TX event interrupt.
|
||
*
|
||
* @param evt_thresh RMT event interrupt threshold value
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_set_tx_thr_intr_en(rmt_channel_t channel, bool en, uint16_t evt_thresh);
|
||
|
||
/**
|
||
* @brief Set RMT pins
|
||
*
|
||
* @param channel RMT channel (0 - 7)
|
||
*
|
||
* @param mode TX or RX mode for RMT
|
||
*
|
||
* @param gpio_num GPIO number to transmit or receive the signal.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_set_pin(rmt_channel_t channel, rmt_mode_t mode, gpio_num_t gpio_num);
|
||
|
||
/**
|
||
* @brief Configure RMT parameters
|
||
*
|
||
* @param rmt_param RMT parameter structor
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_config(const rmt_config_t* rmt_param);
|
||
|
||
/**
|
||
* @brief register RMT interrupt handler, the handler is an ISR.
|
||
*
|
||
* The handler will be attached to the same CPU core that this function is running on.
|
||
* @note If you already called rmt_driver_install to use system RMT driver,
|
||
* please do not register ISR handler again.
|
||
*
|
||
* @param fn Interrupt handler function.
|
||
* @param arg Parameter for handler function
|
||
* @param intr_alloc_flags Flags used to allocate the interrupt. One or multiple (ORred)
|
||
* ESP_INTR_FLAG_* values. See esp_intr_alloc.h for more info.
|
||
* @param handle If non-zero, a handle to later clean up the ISR gets stored here.
|
||
*
|
||
* @return
|
||
* - ESP_OK Success
|
||
* - ESP_ERR_INVALID_ARG Function pointer error.
|
||
* - ESP_FAIL System driver installed, can not register ISR handler for RMT
|
||
*/
|
||
esp_err_t rmt_isr_register(void (* fn)(void* ), void * arg, int intr_alloc_flags, rmt_isr_handle_t *handle);
|
||
|
||
/**
|
||
* @brief Deregister previously registered RMT interrupt handler
|
||
*
|
||
* @param handle Handle obtained from rmt_isr_register
|
||
*
|
||
* @return
|
||
* - ESP_OK Success
|
||
* - ESP_ERR_INVALID_ARG Handle invalid
|
||
*/
|
||
esp_err_t rmt_isr_deregister(rmt_isr_handle_t handle);
|
||
|
||
/**
|
||
* @brief Fill memory data of channel with given RMT items.
|
||
*
|
||
* @param channel RMT channel (0 - 7)
|
||
*
|
||
* @param item Pointer of items.
|
||
*
|
||
* @param item_num RMT sending items number.
|
||
*
|
||
* @param mem_offset Index offset of memory.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_fill_tx_items(rmt_channel_t channel, const rmt_item32_t* item, uint16_t item_num, uint16_t mem_offset);
|
||
|
||
/**
|
||
* @brief Initialize RMT driver
|
||
*
|
||
* @param channel RMT channel (0 - 7)
|
||
*
|
||
* @param rx_buf_size Size of RMT RX ringbuffer. Can be 0 if the RX ringbuffer is not used.
|
||
*
|
||
* @param intr_alloc_flags Flags for the RMT driver interrupt handler. Pass 0 for default flags. See esp_intr_alloc.h for details.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_STATE Driver is already installed, call rmt_driver_uninstall first.
|
||
* - ESP_ERR_NO_MEM Memory allocation failure
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_driver_install(rmt_channel_t channel, size_t rx_buf_size, int intr_alloc_flags);
|
||
|
||
/**
|
||
* @brief Uninstall RMT driver.
|
||
*
|
||
* @param channel RMT channel (0 - 7)
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_driver_uninstall(rmt_channel_t channel);
|
||
|
||
/**
|
||
* @brief RMT send waveform from rmt_item array.
|
||
*
|
||
* This API allows user to send waveform with any length.
|
||
*
|
||
* @param channel RMT channel (0 - 7)
|
||
*
|
||
* @param rmt_item head point of RMT items array.
|
||
*
|
||
* @param item_num RMT data item number.
|
||
*
|
||
* @param wait_tx_done If set 1, it will block the task and wait for sending done.
|
||
*
|
||
* If set 0, it will not wait and return immediately.
|
||
*
|
||
* @note
|
||
* This function will not copy data, instead, it will point to the original items,
|
||
* and send the waveform items.
|
||
* If wait_tx_done is set to true, this function will block and will not return until
|
||
* all items have been sent out.
|
||
* If wait_tx_done is set to false, this function will return immediately, and the driver
|
||
* interrupt will continue sending the items. We must make sure the item data will not be
|
||
* damaged when the driver is still sending items in driver interrupt.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_write_items(rmt_channel_t channel, const rmt_item32_t* rmt_item, int item_num, bool wait_tx_done);
|
||
|
||
/**
|
||
* @brief Wait RMT TX finished.
|
||
*
|
||
* @param channel RMT channel (0 - 7)
|
||
*
|
||
* @param wait_time Maximum time to wait for transmission to be complete
|
||
*
|
||
* @return
|
||
* - ESP_OK RMT Tx done successfully
|
||
* - ESP_ERR_TIMEOUT Crossed the 'wait_time' given
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_FAIL Driver not installed
|
||
*/
|
||
esp_err_t rmt_wait_tx_done(rmt_channel_t channel, TickType_t wait_time);
|
||
|
||
/**
|
||
* @brief Get ringbuffer from UART.
|
||
*
|
||
* Users can get the RMT RX ringbuffer handler, and process the RX data.
|
||
*
|
||
* @param channel RMT channel (0 - 7)
|
||
*
|
||
* @param buf_handle Pointer to buffer handler to accept RX ringbuffer handler.
|
||
*
|
||
* @return
|
||
* - ESP_ERR_INVALID_ARG Parameter error
|
||
* - ESP_OK Success
|
||
*/
|
||
esp_err_t rmt_get_ringbuf_handle(rmt_channel_t channel, RingbufHandle_t* buf_handle);
|
||
|
||
/***************************EXAMPLE**********************************
|
||
*
|
||
* @note
|
||
* You can also refer to example/09_rmt_nec_tx_rx to have more information about how to use RMT module.
|
||
*
|
||
* ----------------EXAMPLE OF RMT SETTING ---------------------
|
||
* @code{c}
|
||
* //1. enable RMT
|
||
* //enable RMT module, or you can not set any register of it.
|
||
* //this will be done in rmt_config API.
|
||
* periph_module_enable(PERIPH_RMT_MODULE);
|
||
* @endcode
|
||
*
|
||
* @code{c}
|
||
* //2. set RMT transmitter
|
||
* void rmt_tx_init()
|
||
* {
|
||
* rmt_config_t rmt_tx;
|
||
* rmt_tx.channel = 0;
|
||
* rmt_tx.gpio_num = 16;
|
||
* rmt_tx.mem_block_num = 1;
|
||
* rmt_tx.clk_div = 100;
|
||
* rmt_tx.tx_config.loop_en = false;
|
||
* rmt_tx.tx_config.carrier_duty_percent = 50;
|
||
* rmt_tx.tx_config.carrier_freq_hz = 38000;
|
||
* rmt_tx.tx_config.carrier_level = 1;
|
||
* rmt_tx.tx_config.carrier_en = RMT_TX_CARRIER_EN;
|
||
* rmt_tx.tx_config.idle_level = 0;
|
||
* rmt_tx.tx_config.idle_output_en = true;
|
||
* rmt_tx.rmt_mode = 0;
|
||
* rmt_config(&rmt_tx);
|
||
*
|
||
* //install system RMT driver, disable rx ringbuffer for transmitter.
|
||
* rmt_driver_install(rmt_tx.channel, 0, 0);
|
||
* }
|
||
*
|
||
* @endcode
|
||
* @code{c}
|
||
* //3. set RMT receiver
|
||
* void rmt_rx_init()
|
||
* {
|
||
* rmt_config_t rmt_rx;
|
||
* rmt_rx.channel = 1;
|
||
* rmt_rx.gpio_num = 19;
|
||
* rmt_rx.clk_div = 100;
|
||
* rmt_rx.mem_block_num = 1;
|
||
* rmt_rx.rmt_mode = RMT_MODE_RX;
|
||
* rmt_rx.rx_config.filter_en = true;
|
||
* rmt_rx.rx_config.filter_ticks_thresh = 100;
|
||
* rmt_rx.rx_config.idle_threshold = 0xffff;
|
||
* rmt_config(&rmt_rx);
|
||
*
|
||
* //install system RMT driver.
|
||
* rmt_driver_install(rmt_rx.channel, 1000, 0);
|
||
* }
|
||
*
|
||
* ----------------EXAMPLE OF RMT INTERRUPT ------------------
|
||
* @code{c}
|
||
*
|
||
* rmt_isr_register(rmt_isr, NULL, 0); //hook the ISR handler for RMT interrupt
|
||
* @endcode
|
||
* @note
|
||
* 0. If you have called rmt_driver_install, you don't need to set ISR handler any more.
|
||
*
|
||
* ----------------EXAMPLE OF INTERRUPT HANDLER ---------------
|
||
* @code{c}
|
||
* #include "esp_attr.h"
|
||
* void IRAM_ATTR rmt_isr_handler(void* arg)
|
||
* {
|
||
* //read RMT interrupt status.
|
||
* uint32_t intr_st = RMT.int_st.val;
|
||
*
|
||
* //you will find which channels have triggered fade_end interrupt here,
|
||
* //then, you can post some event to RTOS queue to process the event.
|
||
* //later we will add a queue in the driver code.
|
||
*
|
||
* //clear RMT interrupt status.
|
||
* RMT.int_clr.val = intr_st;
|
||
* }
|
||
* @endcode
|
||
*
|
||
*--------------------------END OF EXAMPLE --------------------------
|
||
*/
|
||
|
||
|
||
|
||
|
||
|
||
#ifdef __cplusplus
|
||
}
|
||
#endif
|
||
|
||
#endif /* _DRIVER_RMT_CTRL_H_ */
|