esp-idf/components/hal/rmt_hal.c

/*
 * SPDX-FileCopyrightText: 2019-2022 Espressif Systems (Shanghai) CO LTD
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#include "hal/rmt_hal.h"
#include "hal/rmt_ll.h"
#include "soc/soc_caps.h"

void rmt_hal_init(rmt_hal_context_t *hal)
{
    hal->regs = &RMT;
    rmt_ll_mem_power_by_pmu(hal->regs);
    rmt_ll_enable_mem_access_nonfifo(hal->regs, true);     // APB access the RMTMEM in nonfifo mode
    rmt_ll_enable_interrupt(hal->regs, UINT32_MAX, false); // disable all interupt events
    rmt_ll_clear_interrupt_status(hal->regs, UINT32_MAX);  // clear all pending events
    rmt_ll_enable_group_clock(hal->regs, true);            // enable clock source
#if SOC_RMT_SUPPORT_TX_SYNCHRO
    rmt_ll_tx_clear_sync_group(hal->regs);
#endif // SOC_RMT_SUPPORT_TX_SYNCHRO
}

void rmt_hal_deinit(rmt_hal_context_t *hal)
{
    rmt_ll_enable_interrupt(hal->regs, UINT32_MAX, false); // disable all interupt events
    rmt_ll_clear_interrupt_status(hal->regs, UINT32_MAX);  // clear all pending events
    rmt_ll_mem_force_power_off(hal->regs);                 // power off RMTMEM power domain forcefully
    rmt_ll_enable_group_clock(hal->regs, false);           // disable clock source
    hal->regs = NULL;
}

void rmt_hal_tx_channel_reset(rmt_hal_context_t *hal, uint32_t channel)
{
    rmt_ll_tx_reset_channels_clock_div(hal->regs, 1 << channel);
    rmt_ll_tx_reset_pointer(hal->regs, channel);
#if SOC_RMT_SUPPORT_TX_LOOP_COUNT
    rmt_ll_tx_reset_loop_count(hal->regs, channel);
#endif // SOC_RMT_SUPPORT_TX_LOOP_COUNT
    rmt_ll_enable_interrupt(hal->regs, RMT_LL_EVENT_TX_MASK(channel), false);
    rmt_ll_clear_interrupt_status(hal->regs, RMT_LL_EVENT_TX_MASK(channel));
}

void rmt_hal_rx_channel_reset(rmt_hal_context_t *hal, uint32_t channel)
{
    rmt_ll_rx_reset_channels_clock_div(hal->regs, 1 << channel);
    rmt_ll_rx_reset_pointer(hal->regs, channel);
    rmt_ll_enable_interrupt(hal->regs, RMT_LL_EVENT_RX_MASK(channel), false);
    rmt_ll_clear_interrupt_status(hal->regs, RMT_LL_EVENT_RX_MASK(channel));
}