20 lines
816 B
Text
20 lines
816 B
Text
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# Copyright (c) 2021, Nordic Semiconductor ASA
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# SPDX-License-Identifier: Apache-2.0
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config DISPLAY_NRF_LED_MATRIX
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bool "LED matrix driven by GPIOs"
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depends on SOC_FAMILY_NRF
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select NRFX_GPIOTE
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select NRFX_PPI if HAS_HW_NRF_PPI
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help
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Enable driver for a LED matrix with rows and columns driven by
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GPIOs. The matrix is refreshed pixel by pixel (only one LED is
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turned on in particular time slots) and each pixel can have one
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of 256 levels of brightness (0 means off completely).
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Assignment of GPIOs to rows and columns and the mapping of those
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to pixels are specified in properties of a "nordic,nrf-led-matrix"
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compatible node in devicetree.
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The driver uses one TIMER instance and, depending on what is set
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in devicetree, one PWM instance or one PPI channel and one GPIOTE
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channel.
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