mirror of
https://github.com/espressif/esp-idf.git
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73 lines
1.9 KiB
C
73 lines
1.9 KiB
C
/*
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* SPDX-FileCopyrightText: 2024 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 "esp_private/gdma.h"
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#include "esp_private/adc_dma.h"
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static IRAM_ATTR bool adc_dma_in_suc_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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assert(event_data);
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adc_continuous_ctx_t *ctx = (adc_continuous_ctx_t *)user_data;
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ctx->rx_eof_desc_addr = event_data->rx_eof_desc_addr;
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return ctx->adc_intr_func(user_data);
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}
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esp_err_t adc_dma_intr_event_init(adc_continuous_ctx_t *adc_ctx)
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{
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gdma_rx_event_callbacks_t cbs = {
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.on_recv_eof = adc_dma_in_suc_eof_callback
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};
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gdma_register_rx_event_callbacks(adc_ctx->adc_dma.gdma_chan, &cbs, adc_ctx);
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return ESP_OK;
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}
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esp_err_t adc_dma_init(adc_dma_t *adc_dma)
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{
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esp_err_t ret = ESP_OK;
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//alloc rx gdma channel
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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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#if CONFIG_ADC_CONTINUOUS_ISR_IRAM_SAFE
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.flags.isr_cache_safe = true,
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#endif
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};
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ret = gdma_new_ahb_channel(&rx_alloc_config, &(adc_dma->gdma_chan));
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if (ret != ESP_OK) {
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return ret;
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}
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gdma_connect(adc_dma->gdma_chan, GDMA_MAKE_TRIGGER(GDMA_TRIG_PERIPH_ADC, 0));
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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_apply_strategy(adc_dma->gdma_chan, &strategy_config);
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return ESP_OK;
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}
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esp_err_t adc_dma_deinit(adc_dma_t adc_dma)
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{
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gdma_disconnect(adc_dma.gdma_chan);
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gdma_del_channel(adc_dma.gdma_chan);
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return ESP_OK;
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}
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esp_err_t adc_dma_start(adc_dma_t adc_dma, dma_descriptor_t *addr)
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{
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return gdma_start(adc_dma.gdma_chan, (intptr_t)addr);
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}
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esp_err_t adc_dma_stop(adc_dma_t adc_dma)
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{
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return gdma_stop(adc_dma.gdma_chan);
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}
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esp_err_t adc_dma_reset(adc_dma_t adc_dma)
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{
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return gdma_reset(adc_dma.gdma_chan);
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}
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