kopia lustrzana https://github.com/espressif/esp-idf
132 wiersze
3.9 KiB
C
132 wiersze
3.9 KiB
C
/*
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* SPDX-FileCopyrightText: 2020-2021 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 "freertos/FreeRTOS.h"
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#include "soc/periph_defs.h"
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#include "soc/soc_memory_layout.h"
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#include "soc/soc_caps.h"
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#include "hal/gdma_ll.h"
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#include "hal/gdma_hal.h"
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#include "esp_private/periph_ctrl.h"
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#include "esp_log.h"
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#include "esp_attr.h"
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#include "esp_err.h"
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#include "esp_async_memcpy_impl.h"
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IRAM_ATTR static bool async_memcpy_impl_rx_eof_callback(gdma_channel_handle_t dma_chan, gdma_event_data_t *event_data, void *user_data)
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{
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async_memcpy_impl_t *mcp_impl = (async_memcpy_impl_t *)user_data;
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mcp_impl->rx_eof_addr = event_data->rx_eof_desc_addr;
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async_memcpy_isr_on_rx_done_event(mcp_impl);
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return mcp_impl->isr_need_yield;
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}
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esp_err_t async_memcpy_impl_init(async_memcpy_impl_t *impl)
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{
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esp_err_t ret = ESP_OK;
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// create TX channel and reserve sibling channel for future use
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gdma_channel_alloc_config_t tx_alloc_config = {
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.flags.reserve_sibling = 1,
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.direction = GDMA_CHANNEL_DIRECTION_TX,
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};
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ret = gdma_new_channel(&tx_alloc_config, &impl->tx_channel);
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if (ret != ESP_OK) {
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goto err;
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}
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// create RX channel and specify it should be reside in the same pair as TX
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gdma_channel_alloc_config_t rx_alloc_config = {
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.direction = GDMA_CHANNEL_DIRECTION_RX,
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.sibling_chan = impl->tx_channel,
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};
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ret = gdma_new_channel(&rx_alloc_config, &impl->rx_channel);
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if (ret != ESP_OK) {
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goto err;
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}
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gdma_trigger_t m2m_trigger = GDMA_MAKE_TRIGGER(GDMA_TRIG_PERIPH_M2M, 0);
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// get a free DMA trigger ID for memory copy
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uint32_t free_m2m_id_mask = 0;
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gdma_get_free_m2m_trig_id_mask(impl->tx_channel, &free_m2m_id_mask);
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m2m_trigger.instance_id = __builtin_ctz(free_m2m_id_mask);
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gdma_connect(impl->rx_channel, m2m_trigger);
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gdma_connect(impl->tx_channel, m2m_trigger);
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gdma_strategy_config_t strategy_config = {
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.auto_update_desc = true,
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.owner_check = true,
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};
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gdma_transfer_ability_t transfer_ability = {
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.sram_trans_align = impl->sram_trans_align,
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.psram_trans_align = impl->psram_trans_align,
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};
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ret = gdma_set_transfer_ability(impl->tx_channel, &transfer_ability);
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if (ret != ESP_OK) {
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goto err;
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}
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ret = gdma_set_transfer_ability(impl->rx_channel, &transfer_ability);
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if (ret != ESP_OK) {
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goto err;
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}
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gdma_apply_strategy(impl->tx_channel, &strategy_config);
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gdma_apply_strategy(impl->rx_channel, &strategy_config);
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gdma_rx_event_callbacks_t cbs = {
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.on_recv_eof = async_memcpy_impl_rx_eof_callback
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};
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ret = gdma_register_rx_event_callbacks(impl->rx_channel, &cbs, impl);
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err:
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return ret;
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}
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esp_err_t async_memcpy_impl_deinit(async_memcpy_impl_t *impl)
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{
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gdma_disconnect(impl->rx_channel);
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gdma_disconnect(impl->tx_channel);
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gdma_del_channel(impl->rx_channel);
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gdma_del_channel(impl->tx_channel);
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return ESP_OK;
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}
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esp_err_t async_memcpy_impl_start(async_memcpy_impl_t *impl, intptr_t outlink_base, intptr_t inlink_base)
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{
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gdma_start(impl->rx_channel, inlink_base);
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gdma_start(impl->tx_channel, outlink_base);
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return ESP_OK;
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}
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esp_err_t async_memcpy_impl_stop(async_memcpy_impl_t *impl)
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{
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gdma_stop(impl->rx_channel);
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gdma_stop(impl->tx_channel);
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return ESP_OK;
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}
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esp_err_t async_memcpy_impl_restart(async_memcpy_impl_t *impl)
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{
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gdma_append(impl->rx_channel);
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gdma_append(impl->tx_channel);
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return ESP_OK;
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}
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bool async_memcpy_impl_is_buffer_address_valid(async_memcpy_impl_t *impl, void *src, void *dst)
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{
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bool valid = true;
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if (esp_ptr_external_ram(dst)) {
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if (impl->psram_trans_align) {
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valid = valid && (((intptr_t)dst & (impl->psram_trans_align - 1)) == 0);
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}
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} else {
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if (impl->sram_trans_align) {
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valid = valid && (((intptr_t)dst & (impl->sram_trans_align - 1)) == 0);
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}
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}
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return valid;
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}
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