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samples: Add RTxxx AMP samples
Move CM33-HiFi4 memory split into a separate DT fragment. Add common structure for RTxxx AMP samples. Add amp_blink and amp_mbox samples. These samples are now configured only for the mimxrt685_evk, but are intended to support other NXP microcontrollers with HiFi * DSP cores instantiated at a later date. Signed-off-by: Vit Stanicek <[email protected]>
1 parent 324f4f1 commit e59e036

26 files changed

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‎dts/arm/nxp/nxp_rt6xx_common.dtsi

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@@ -98,7 +98,7 @@
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sram0: memory@180000 {
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compatible = "mmio-sram";
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reg = <0x180000 DT_SIZE_K(2560)>;
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reg = <0x180000 DT_SIZE_K(3072)>;
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};
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sram1: memory@40140000 {

‎dts/arm/nxp/nxp_rt6xx_hifi4memsplit.dtsi

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/*
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* Copyright 2025 NXP
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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&sram0 {
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reg = <0x180000 DT_SIZE_K(2560)>;
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};

‎samples/boards/nxp/adsp/rtxxx/amp_blinky/CMakeLists.txt

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# Copyright (c) 2025 NXP
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# SPDX-License-Identifier: Apache-2.0
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cmake_minimum_required(VERSION 3.20.0)
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find_package(Zephyr HINTS $ENV{ZEPHYR_BASE})
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project(amp_blinky)
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target_sources(app PRIVATE src/main.c)
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set(HIFI4_BUILD_DIR "${CMAKE_CURRENT_LIST_DIR}/build/remote/zephyr")
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include("${CMAKE_CURRENT_LIST_DIR}/../common/adsp-load.cmake")

‎samples/boards/nxp/adsp/rtxxx/amp_blinky/boards/mimxrt685_evk_mimxrt685s_cm33.conf

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CONFIG_INIT_AUDIO_PLL=y
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CONFIG_INIT_SYS_PLL=y

‎samples/boards/nxp/adsp/rtxxx/amp_blinky/boards/mimxrt685_evk_mimxrt685s_cm33.overlay

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/*
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* Copyright 2025 NXP
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <nxp/nxp_rt6xx_hifi4memsplit.dtsi>
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&adsp {
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status = "okay";
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};

‎samples/boards/nxp/adsp/rtxxx/amp_blinky/prj.conf

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CONFIG_NXP_RTXXX_ADSP_CTRL=y

‎samples/boards/nxp/adsp/rtxxx/amp_blinky/remote/CMakeLists.txt

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# Copyright (c) 2025 NXP
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# SPDX-License-Identifier: Apache-2.0
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set(BOARD mimxrt685_evk/mimxrt685s/hifi4)
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cmake_minimum_required(VERSION 3.20.0)
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find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
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project(remote)
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target_sources(app PRIVATE src/main.c)
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include("${CMAKE_CURRENT_LIST_DIR}/../../common/remote-adsp-imgs.cmake")

‎samples/boards/nxp/adsp/rtxxx/amp_blinky/remote/prj.conf

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# Nothing here - default config suffices.

‎samples/boards/nxp/adsp/rtxxx/amp_blinky/remote/src/main.c

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/*
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* Copyright 2025 NXP
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <stdbool.h>
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#include <zephyr/kernel.h>
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#include <zephyr/drivers/gpio.h>
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#include <zephyr/devicetree.h>
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#include <zephyr/drivers/i2s.h>
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#define SLEEP_TIME_MS 1000
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#define LED_NODE DT_ALIAS(led1)
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#define BTN_NODE DT_ALIAS(sw0)
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static const struct gpio_dt_spec led = GPIO_DT_SPEC_GET(LED_NODE, gpios);
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static const struct gpio_dt_spec btn = GPIO_DT_SPEC_GET_OR(BTN_NODE, gpios, {0});
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static struct gpio_callback button_cb_data;
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static bool blink = true;
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static struct k_thread th_blink;
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static K_THREAD_STACK_DEFINE(th_blink_stack, 4096);
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void btn_isr(const struct device *dev, struct gpio_callback *cb, uint32_t pins)
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{
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printk("[DSP] Button pressed!\n");
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blink = !blink;
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}
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void thread_blink(void *unused0, void *unused1, void *unused2)
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{
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int ret = 0;
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while (1) {
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if (blink) {
38+
ret = gpio_pin_toggle_dt(&led);
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if (ret < 0) {
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return;
41+
}
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} else {
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ret = gpio_pin_set_dt(&led, 0);
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if (ret < 0) {
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return;
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}
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}
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k_msleep(SLEEP_TIME_MS);
49+
}
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}
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int main(void)
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{
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int ret;
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printk("[DSP] Hello World! %s\n", CONFIG_BOARD_TARGET);
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if (!gpio_is_ready_dt(&btn)) {
59+
return 0;
60+
}
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if (gpio_pin_configure_dt(&btn, GPIO_INPUT) != 0) {
63+
return 0;
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}
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if (gpio_pin_interrupt_configure_dt(&btn, GPIO_INT_EDGE_TO_ACTIVE) != 0) {
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return 0;
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}
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gpio_init_callback(&button_cb_data, &btn_isr, BIT(btn.pin));
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gpio_add_callback(btn.port, &button_cb_data);
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if (!gpio_is_ready_dt(&led)) {
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return 0;
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}
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ret = gpio_pin_configure_dt(&led, GPIO_OUTPUT_ACTIVE);
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if (ret < 0) {
79+
return 0;
80+
}
81+
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k_thread_create(&th_blink, th_blink_stack, K_THREAD_STACK_SIZEOF(th_blink_stack),
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thread_blink, NULL, NULL, NULL, 5, 0, K_NO_WAIT);
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return 0;
86+
}

‎samples/boards/nxp/adsp/rtxxx/amp_blinky/src/main.c

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/*
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* Copyright 2025 NXP
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/kernel.h>
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#include "adsp.h"
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int main(void)
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{
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printk("Hello World! %s\n", CONFIG_BOARD_TARGET);
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printk("[CM33] Starting HiFi4 DSP...\n");
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dspStart();
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return 0;
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}

‎samples/boards/nxp/adsp/rtxxx/amp_blinky/sysbuild.cmake

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# Copyright (c) 2025 NXP
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# SPDX-License-Identifier: Apache-2.0
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include("${CMAKE_CURRENT_LIST_DIR}/../common/remote-adsp-board-select.cmake")
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ExternalZephyrProject_Add(
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APPLICATION remote
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SOURCE_DIR ${APP_DIR}/remote
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BOARD ${REMOTE_BOARD}
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BUILD_ONLY TRUE
11+
)
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add_dependencies(${DEFAULT_IMAGE} remote)
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sysbuild_add_dependencies(CONFIGURE ${DEFAULT_IMAGE} remote)

‎samples/boards/nxp/adsp/rtxxx/amp_mbox/CMakeLists.txt

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# Copyright (c) 2025 NXP
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# SPDX-License-Identifier: Apache-2.0
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cmake_minimum_required(VERSION 3.20.0)
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find_package(Zephyr HINTS $ENV{ZEPHYR_BASE})
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project(amp_blinky)
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target_sources(app PRIVATE src/main.c)
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set(HIFI4_BUILD_DIR "${CMAKE_CURRENT_LIST_DIR}/build/remote/zephyr")
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include("${CMAKE_CURRENT_LIST_DIR}/../common/adsp-load.cmake")

‎samples/boards/nxp/adsp/rtxxx/amp_mbox/boards/mimxrt685_evk_mimxrt685s_cm33.conf

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CONFIG_INIT_AUDIO_PLL=y
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CONFIG_INIT_SYS_PLL=y

‎samples/boards/nxp/adsp/rtxxx/amp_mbox/boards/mimxrt685_evk_mimxrt685s_cm33.overlay

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/*
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* Copyright 2025 NXP
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <nxp/nxp_rt6xx_hifi4memsplit.dtsi>
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&adsp {
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status = "okay";
11+
};

‎samples/boards/nxp/adsp/rtxxx/amp_mbox/prj.conf

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CONFIG_NXP_RTXXX_ADSP_CTRL=y
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CONFIG_MBOX=y

‎samples/boards/nxp/adsp/rtxxx/amp_mbox/remote/CMakeLists.txt

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# Copyright (c) 2025 NXP
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# SPDX-License-Identifier: Apache-2.0
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set(BOARD mimxrt685_evk/mimxrt685s/hifi4)
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cmake_minimum_required(VERSION 3.20.0)
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find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
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project(remote)
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target_sources(app PRIVATE src/main.c)
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include("${CMAKE_CURRENT_LIST_DIR}/../../common/remote-adsp-imgs.cmake")

‎samples/boards/nxp/adsp/rtxxx/amp_mbox/remote/prj.conf

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CONFIG_MBOX=y

‎samples/boards/nxp/adsp/rtxxx/amp_mbox/remote/src/main.c

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/*
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* Copyright 2025 NXP
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <stdbool.h>
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#include <zephyr/kernel.h>
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#include <zephyr/drivers/gpio.h>
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#include <zephyr/drivers/mbox.h>
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#include <zephyr/devicetree.h>
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#include <zephyr/drivers/i2s.h>
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const static struct device *mbox = DEVICE_DT_GET(DT_ALIAS(mbox));
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static mbox_channel_id_t chmbox;
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void mbox_cb(const struct device *dev, uint32_t channel, void *user_data, struct mbox_msg *data)
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{
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if (data == NULL) {
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printk("[DSP] IPI from MU(A).\n");
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} else {
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uint32_t val = *(uint32_t *)(data->data);
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printk("[DSP] Incoming mbox message: data(uint32_t)=0x%x\n", val);
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}
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}
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int main(void)
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{
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int ret;
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printk("[DSP] Hello World! %s\n", CONFIG_BOARD);
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if (!device_is_ready(mbox)) {
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return 0;
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}
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if (mbox_register_callback(mbox, chmbox, &mbox_cb, NULL) < 0) {
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return 0;
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}
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if (mbox_set_enabled(mbox, chmbox, true) < 0) {
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return 0;
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}
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return 0;
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}

‎samples/boards/nxp/adsp/rtxxx/amp_mbox/src/main.c

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/*
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* Copyright 2025 NXP
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/kernel.h>
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#include <zephyr/drivers/mbox.h>
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#include "adsp.h"
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static const struct device *mbox = DEVICE_DT_GET(DT_ALIAS(mbox));
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static mbox_channel_id_t chmbox;
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static uint32_t mboxData = 0x12345678;
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int main(void) {
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printk("Hello World! %s\n", CONFIG_BOARD);
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if (!device_is_ready(mbox)) {
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return 0;
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}
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mbox_set_enabled(mbox, chmbox, true);
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printk("[CM33] Starting HiFi4 DSP... \n");
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dspStart();
27+
k_msleep(1000);
28+
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struct mbox_msg msg = {.data = &mboxData, .size = sizeof(mboxData)};
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printk("[CM33] Sending mbox message... ");
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if (mbox_send(mbox, chmbox, &msg) < 0) {
33+
printk("failed!");
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}
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printk("\n");
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return 0;
38+
}

‎samples/boards/nxp/adsp/rtxxx/amp_mbox/sysbuild.cmake

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# Copyright (c) 2025 NXP
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# SPDX-License-Identifier: Apache-2.0
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include("${CMAKE_CURRENT_LIST_DIR}/../common/remote-adsp-board-select.cmake")
5+
6+
ExternalZephyrProject_Add(
7+
APPLICATION remote
8+
SOURCE_DIR ${APP_DIR}/remote
9+
BOARD ${REMOTE_BOARD}
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BUILD_ONLY TRUE
11+
)
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add_dependencies(${DEFAULT_IMAGE} remote)
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sysbuild_add_dependencies(CONFIGURE ${DEFAULT_IMAGE} remote)

‎samples/boards/nxp/adsp/rtxxx/common/adsp-load.cmake

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# Copyright (c) 2025 NXP
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# SPDX-License-Identifier: Apache-2.0
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target_sources(app PRIVATE "${CMAKE_CURRENT_LIST_DIR}/src/adsp.c" "${CMAKE_CURRENT_LIST_DIR}/src/adspimgs.S")
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include_directories("${CMAKE_CURRENT_LIST_DIR}/src/")
6+
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set(HIFI4_BIN_SYMS
8+
"HIFI4_BIN_RESET=\"${HIFI4_BUILD_DIR}/zephyr.reset.bin\""
9+
"HIFI4_BIN_TEXT=\"${HIFI4_BUILD_DIR}/zephyr.text.bin\""
10+
"HIFI4_BIN_DATA=\"${HIFI4_BUILD_DIR}/zephyr.data.bin\""
11+
)
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set_source_files_properties(
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"${CMAKE_CURRENT_LIST_DIR}/src/adspimgs.S"
15+
PROPERTIES
16+
COMPILE_DEFINITIONS
17+
"${HIFI4_BIN_SYMS}"
18+
)
19+
20+
set_source_files_properties(
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"${CMAKE_CURRENT_LIST_DIR}/src/adspimgs.S"
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OBJECT_DEPENDS
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${HIFI4_BUILD_DIR}/zephyr.elf
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)

‎samples/boards/nxp/adsp/rtxxx/common/remote-adsp-board-select.cmake

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# Copyright (c) 2025 NXP
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# SPDX-License-Identifier: Apache-2.0
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if(${BOARD} STREQUAL "mimxrt685_evk")
5+
set(REMOTE_BOARD "mimxrt685_evk/mimxrt685s/hifi4")
6+
else()
7+
message(FATAL_ERROR "This example is not supported on the selected board.")
8+
endif()

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