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/Zephyr-latest/dts/bindings/misc/
Dzephyr,swdp-gpio.yaml3 # SPDX-License-Identifier: Apache-2.0
7 implementation by GPIO bit-banging.
9 Schematic using dual-supply bus transceiver and separate dout and dnoe pins
13 | +-------------+ |
14 +-------|vcca vccb|-----+
16 clk-gpios -------|a b|-------------- SWD CLK
18 noe-gpios -------|dir gnd|-----+
19 +-------------+ |
26 | +-------------+ |
27 +-------|vcca vccb|-----+
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/Zephyr-latest/samples/subsys/dap/
Dapp.overlay4 * SPDX-License-Identifier: Apache-2.0
9 compatible = "zephyr,swdp-gpio";
12 clk-gpios = <&arduino_header 10 GPIO_ACTIVE_HIGH>; /* D4 */
13 noe-gpios = <&arduino_header 9 GPIO_ACTIVE_HIGH>; /* D3 */
14 dio-gpios = <&arduino_header 8 GPIO_PULL_UP>; /* D2 */
15 port-write-cycles = <2>;
/Zephyr-latest/samples/subsys/dap/boards/
Dnrf52840dk_nrf52840.overlay4 * SPDX-License-Identifier: Apache-2.0
9 compatible = "zephyr,swdp-gpio";
11 clk-gpios = <&arduino_header 10 GPIO_ACTIVE_HIGH>; /* D4 */
12 dio-gpios = <&arduino_header 8 GPIO_PULL_UP>; /* D2 */
13 dout-gpios = <&arduino_header 9 GPIO_ACTIVE_HIGH>; /* D3 */
14 dnoe-gpios = <&arduino_header 12 GPIO_ACTIVE_HIGH>; /* D6 */
15 noe-gpios = <&arduino_header 11 GPIO_ACTIVE_HIGH>; /* D5 */
16 reset-gpios = <&arduino_header 13 GPIO_ACTIVE_HIGH>; /* D7 */
17 port-write-cycles = <2>;
/Zephyr-latest/drivers/dp/
Dswdp_bitbang.c2 * Copyright (c) 2018-2019 PHYTEC Messtechnik GmbH
5 * SPDX-License-Identifier: Apache-2.0
9 * This file is based on SW_DP.c from CMSIS-DAP Source (Revision: V2.0.0)
10 * https://github.com/ARM-software/CMSIS_5/tree/develop/CMSIS/DAP/Firmware
11 * Copyright (c) 2013-2017, ARM Limited, All Rights Reserved
12 * SPDX-License-Identifier: Apache-2.0
16 /* Serial Wire Debug Port interface bit-bang driver */
49 struct gpio_dt_spec noe; member
69 * - CMSIS-DAP Command Specification, DAP_Transfer
70 * - ARM Debug Interface v5 Architecture Specification
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