pNexus
ec1ba14e46
PDWN 浮空导致 ADS1256 进入 power-down 模式，DRDY 无响应且 SPI 总线 无输出。同时将 CS 管理从手动 GPIO 改为 SPIM 驱动自动控制，消除引脚 所有权冲突；读寄存器和读数据改用 spi_transceive 保证单次 CS 内完成。
67 lines
1.5 KiB
Plaintext
67 lines
1.5 KiB
Plaintext
/*
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* Copyright (c) 2022 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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*/
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/*
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* nRF5340 DK (App Core) Overlay for ADS1256
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* 仅保留 SPI 和 GPIO 定义
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*/
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&spi1 {
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compatible = "nordic,nrf-spim";
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status = "okay";
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pinctrl-0 = <&spi1_default>;
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pinctrl-1 = <&spi1_sleep>;
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pinctrl-names = "default", "sleep";
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/* CS 引脚配置 */
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cs-gpios = <&gpio1 12 GPIO_ACTIVE_LOW>;
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ads1256: ads1256@0 {
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compatible = "ti,ads1256";
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reg = <0>;
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spi-max-frequency = <1000000>;
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};
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};
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&pinctrl {
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spi1_default: spi1_default {
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group1 {
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psels = <NRF_PSEL(SPIM_SCK, 1, 15)>,
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<NRF_PSEL(SPIM_MOSI, 1, 13)>,
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<NRF_PSEL(SPIM_MISO, 1, 14)>;
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};
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};
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spi1_sleep: spi1_sleep {
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group1 {
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psels = <NRF_PSEL(SPIM_SCK, 1, 15)>,
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<NRF_PSEL(SPIM_MOSI, 1, 13)>,
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<NRF_PSEL(SPIM_MISO, 1, 14)>;
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low-power-enable;
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};
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};
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};
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/ {
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aliases {
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ads-drdy = &ads_drdy_pin;
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ads-reset = &ads_reset_pin;
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ads-pdwn = &ads_pdwn_pin;
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};
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ads1256_control {
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compatible = "gpio-keys";
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ads_drdy_pin: ads_drdy {
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gpios = <&gpio1 11 GPIO_ACTIVE_LOW>;
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};
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ads_reset_pin: ads_reset {
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gpios = <&gpio1 10 GPIO_ACTIVE_LOW>;
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};
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ads_pdwn_pin: ads_pdwn {
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gpios = <&gpio1 9 GPIO_ACTIVE_LOW>;
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};
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};
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};
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