0bf2906bc9
After RMT driver refactor, two breaking change are introduced:
1. Users needs to call `rmt_driver_install` before `rmt_config`.
2. Do not support memory block count > 1,
fix this two issues
closes https://github.com/espressif/esp-idf/issues/4664
closes https://github.com/espressif/esp-idf/issues/4959
136 lines
4.5 KiB
C
136 lines
4.5 KiB
C
// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "soc/rmt_struct.h"
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#include "soc/rmt_caps.h"
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/**
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* @brief HAL context type of RMT driver
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*
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*/
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typedef struct {
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rmt_dev_t *regs; /*!< RMT Register base address */
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rmt_mem_t *mem; /*!< RMT Memory base address */
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} rmt_hal_context_t;
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#define RMT_MEM_OWNER_SW (0) /*!< RMT Memory ownership belongs to software side */
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#define RMT_MEM_OWNER_HW (1) /*!< RMT Memory ownership belongs to hardware side */
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/**
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* @brief Initialize the RMT HAL driver
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*
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* @param hal: RMT HAL context
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*/
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void rmt_hal_init(rmt_hal_context_t *hal);
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/**
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* @brief Reset RMT Channel specific HAL driver
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*
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* @param hal: RMT HAL context
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* @param channel: RMT channel number
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*/
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void rmt_hal_channel_reset(rmt_hal_context_t *hal, uint32_t channel);
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/**
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* @brief Set counter clock for RMT channel
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*
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* @param hal: RMT HAL context
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* @param channel: RMT channel number
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* @param base_clk_hz: base clock for RMT internal channel (counter clock will divide from it)
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* @param counter_clk_hz: target counter clock
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*/
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void rmt_hal_set_counter_clock(rmt_hal_context_t *hal, uint32_t channel, uint32_t base_clk_hz, uint32_t counter_clk_hz);
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/**
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* @brief Get counter clock for RMT channel
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*
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* @param hal: RMT HAL context
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* @param channel: RMT channel number
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* @param base_clk_hz: base clock for RMT internal channel (counter clock will divide from it)
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* @return counter clock in Hz
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*/
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uint32_t rmt_hal_get_counter_clock(rmt_hal_context_t *hal, uint32_t channel, uint32_t base_clk_hz);
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/**
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* @brief Set carrier clock for RMT channel
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*
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* @param hal: RMT HAL context
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* @param channel: RMT channel number
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* @param base_clk_hz: base clock for RMT carrier generation (carrier clock will divide from it)
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* @param carrier_clk_hz: target carrier clock
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* @param carrier_clk_duty: duty ratio of carrier clock
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*/
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void rmt_hal_set_carrier_clock(rmt_hal_context_t *hal, uint32_t channel, uint32_t base_clk_hz, uint32_t carrier_clk_hz, float carrier_clk_duty);
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/**
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* @brief Get carrier clock for RMT channel
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*
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* @param hal: RMT HAL context
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* @param channel: RMT channel number
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* @param base_clk_hz: base clock for RMT carrier generation
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* @param carrier_clk_hz: target carrier clock
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* @param carrier_clk_duty: duty ratio of carrier clock
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*/
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void rmt_hal_get_carrier_clock(rmt_hal_context_t *hal, uint32_t channel, uint32_t base_clk_hz, uint32_t *carrier_clk_hz, float *carrier_clk_duty);
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/**
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* @brief Set filter threshold for RMT Receive channel
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*
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* @param hal: RMT HAL context
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* @param channel: RMT channel number
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* @param base_clk_hz: base clock for RMT receive filter
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* @param thres_us: threshold of RMT receive filter, in us
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*/
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void rmt_hal_set_rx_filter_thres(rmt_hal_context_t *hal, uint32_t channel, uint32_t base_clk_hz, uint32_t thres_us);
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/**
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* @brief Set idle threshold for RMT Receive channel
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*
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* @param hal: RMT HAL context
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* @param channel: RMT channel number
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* @param base_clk_hz: base clock for RMT receive channel
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* @param thres_us: IDLE threshold for RMT receive channel
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*/
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void rmt_hal_set_rx_idle_thres(rmt_hal_context_t *hal, uint32_t channel, uint32_t base_clk_hz, uint32_t thres_us);
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/**
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* @brief Receive a frame from RMT channel
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*
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* @param hal: RMT HAL context
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* @param channel: RMT channel number
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* @param buf: buffer to store received RMT frame
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* @return number of items that get received
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*/
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uint32_t rmt_hal_receive(rmt_hal_context_t *hal, uint32_t channel, rmt_item32_t *buf);
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/**
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* @brief Transmit a from by RMT
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*
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* @param hal: RMT HAL context
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* @param channel: RMT channel number
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* @param src: RMT items to transmit
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* @param length: length of RMT items to transmit
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* @param offset: offset of RMT internal memory to store the items.
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* Note: the caller should ensure that (length + offset) <= (memory block * SOC_RMT_CHANNEL_MEM_WORDS).
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*/
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void rmt_hal_transmit(rmt_hal_context_t *hal, uint32_t channel, const rmt_item32_t *src, uint32_t length, uint32_t offset);
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#ifdef __cplusplus
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}
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#endif
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