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https://github.com/espressif/esp-idf.git
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2fb43820c2
The legacy driver can't handle the breaking change between esp chips very well. And it's not elegant to extend new feature like DMA, ETM. The new driver can return a opaque handle for each RMT channel. An obvious transaction concept was also introduced. TX and RX functionalities are splited out.
48 lines
1.9 KiB
C
48 lines
1.9 KiB
C
/*
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* SPDX-FileCopyrightText: 2019-2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "hal/rmt_hal.h"
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#include "hal/rmt_ll.h"
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#include "soc/soc_caps.h"
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void rmt_hal_init(rmt_hal_context_t *hal)
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{
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hal->regs = &RMT;
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rmt_ll_power_down_mem(hal->regs, false); // turn on RMTMEM power domain
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rmt_ll_enable_mem_access_nonfifo(hal->regs, true); // APB access the RMTMEM in nonfifo mode
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rmt_ll_enable_interrupt(hal->regs, UINT32_MAX, false); // disable all interupt events
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rmt_ll_clear_interrupt_status(hal->regs, UINT32_MAX); // clear all pending events
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#if SOC_RMT_SUPPORT_TX_SYNCHRO
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rmt_ll_tx_clear_sync_group(hal->regs);
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#endif // SOC_RMT_SUPPORT_TX_SYNCHRO
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}
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void rmt_hal_deinit(rmt_hal_context_t *hal)
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{
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rmt_ll_enable_interrupt(hal->regs, UINT32_MAX, false); // disable all interupt events
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rmt_ll_clear_interrupt_status(hal->regs, UINT32_MAX); // clear all pending events
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rmt_ll_power_down_mem(hal->regs, true); // turn off RMTMEM power domain
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hal->regs = NULL;
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}
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void rmt_hal_tx_channel_reset(rmt_hal_context_t *hal, uint32_t channel)
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{
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rmt_ll_tx_reset_channels_clock_div(hal->regs, 1 << channel);
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rmt_ll_tx_reset_pointer(hal->regs, channel);
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#if SOC_RMT_SUPPORT_TX_LOOP_COUNT
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rmt_ll_tx_reset_loop_count(hal->regs, channel);
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#endif // SOC_RMT_SUPPORT_TX_LOOP_COUNT
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rmt_ll_enable_interrupt(hal->regs, RMT_LL_EVENT_TX_MASK(channel), false);
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rmt_ll_clear_interrupt_status(hal->regs, RMT_LL_EVENT_TX_MASK(channel));
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}
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void rmt_hal_rx_channel_reset(rmt_hal_context_t *hal, uint32_t channel)
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{
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rmt_ll_rx_reset_channels_clock_div(hal->regs, 1 << channel);
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rmt_ll_rx_reset_pointer(hal->regs, channel);
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rmt_ll_enable_interrupt(hal->regs, RMT_LL_EVENT_RX_MASK(channel), false);
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rmt_ll_clear_interrupt_status(hal->regs, RMT_LL_EVENT_RX_MASK(channel));
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}
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