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237c49acb8
Previously, configuring the GDMA was limited to a single descriptor, restricting memory transfers to a maximum of 4kB. This update introduces support for multiple descriptors, enabling users to define multiple dma_blocks. The maximum number of descriptors can be configured via the CONFIG_DMA_ESP32_DESCRIPTOR_NUM option. Additionally, the dma_get_status() function now reports the index of the currently processed descriptor through the status.read_position and status.write_position fields. Signed-off-by: Armin Kessler <ake@espros.com>
16 lines
424 B
Plaintext
16 lines
424 B
Plaintext
# Copyright (c) 2022 Espressif Systems (Shanghai) Co., Ltd.
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# SPDX-License-Identifier: Apache-2.0
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config DMA_ESP32
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bool "ESP32 General Purpose DMA driver"
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depends on DT_HAS_ESPRESSIF_ESP32_GDMA_ENABLED
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default y
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help
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General Purpose DMA for ESP32 series.
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config DMA_ESP32_MAX_DESCRIPTOR_NUM
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int "Maximal number of available DMA descriptors"
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default 16
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help
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Reserves memory for a maximal number of descriptors
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