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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 0f35bd2

26 files changed

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-1
lines changed

‎dts/arm/nxp/nxp_rt6xx_common.dtsi

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@@ -98,7 +98,7 @@
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9999
sram0: memory@180000 {
100100
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)
33+
{
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int ret = 0;
35+
while (1) {
36+
if (blink) {
37+
ret = gpio_pin_toggle_dt(&led);
38+
if (ret < 0) {
39+
return;
40+
}
41+
} else {
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ret = gpio_pin_set_dt(&led, 0);
43+
if (ret < 0) {
44+
return;
45+
}
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}
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k_msleep(SLEEP_TIME_MS);
48+
}
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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)) {
57+
return 0;
58+
}
59+
60+
if (gpio_pin_configure_dt(&btn, GPIO_INPUT) != 0) {
61+
return 0;
62+
}
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if (gpio_pin_interrupt_configure_dt(&btn, GPIO_INT_EDGE_TO_ACTIVE) != 0) {
65+
return 0;
66+
}
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gpio_init_callback(&button_cb_data, &btn_isr, BIT(btn.pin));
69+
gpio_add_callback(btn.port, &button_cb_data);
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if (!gpio_is_ready_dt(&led)) {
72+
return 0;
73+
}
74+
75+
ret = gpio_pin_configure_dt(&led, GPIO_OUTPUT_ACTIVE);
76+
if (ret < 0) {
77+
return 0;
78+
}
79+
80+
k_thread_create(&th_blink, th_blink_stack, K_THREAD_STACK_SIZEOF(th_blink_stack),
81+
thread_blink, NULL, NULL, NULL, 5, 0, K_NO_WAIT);
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return 0;
84+
}

‎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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{
13+
printk("Hello World! %s\n", CONFIG_BOARD_TARGET);
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printk("[CM33] Starting HiFi4 DSP... \n");
16+
dspStart();
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return 0;
19+
}

‎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(
7+
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 $ENV{ZEPHYR_BASE})
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project(amp_blinky)
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target_sources(app PRIVATE src/main.c)
10+
11+
set(HIFI4_BUILD_DIR "${CMAKE_CURRENT_LIST_DIR}/build/remote/zephyr")
12+
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>
8+
9+
&adsp {
10+
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 = 0;
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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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{
19+
if(data == NULL)
20+
{
21+
printk("[DSP] IPI from MU(A).\n");
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}
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else
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{
25+
uint32_t val = *(uint32_t*)(data->data);
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printk("[DSP] Incoming mbox message: data(uint32_t)=0x%x\n", val);
27+
}
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}
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int main(void)
31+
{
32+
int ret;
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printk("[DSP] Hello World! %s\n", CONFIG_BOARD);
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35+
if(!device_is_ready(mbox))
36+
{
37+
return 0;
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}
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if(mbox_register_callback(mbox, chmbox, &mbox_cb, NULL) < 0)
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{
42+
return 0;
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}
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if(mbox_set_enabled(mbox, chmbox, true) < 0)
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{
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return 0;
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}
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return 0;
50+
}

‎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 = 0;
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static uint32_t mboxData = 0x12345678;
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int main(void)
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{
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printk("Hello World! %s\n", CONFIG_BOARD);
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if(!device_is_ready(mbox))
22+
{
23+
return 0;
24+
}
25+
mbox_set_enabled(mbox, chmbox, true);
26+
27+
printk("[CM33] Starting HiFi4 DSP... \n");
28+
dspStart();
29+
k_msleep(1000);
30+
31+
struct mbox_msg msg = {
32+
.data = &mboxData,
33+
.size = sizeof(mboxData)
34+
};
35+
printk("[CM33] Sending mbox message... ");
36+
if(mbox_send(mbox, chmbox, &msg) < 0)
37+
{
38+
printk("failed!");
39+
}
40+
printk("\n");
41+
42+
return 0;
43+
}

‎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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4+
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 ${REMOTE_BOARD}
10+
BUILD_ONLY TRUE
11+
)
12+
13+
add_dependencies(${DEFAULT_IMAGE} remote)
14+
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
3+
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target_sources(app PRIVATE "${CMAKE_CURRENT_LIST_DIR}/src/adsp.c" "${CMAKE_CURRENT_LIST_DIR}/src/adspimgs.S")
5+
include_directories("${CMAKE_CURRENT_LIST_DIR}/src/")
6+
7+
set(HIFI4_BIN_SYMS
8+
"HIFI4_BIN_RESET=\"${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+
)
12+
13+
set_source_files_properties(
14+
"${CMAKE_CURRENT_LIST_DIR}/src/adspimgs.S"
15+
PROPERTIES
16+
COMPILE_DEFINITIONS
17+
"${HIFI4_BIN_SYMS}"
18+
)
19+
20+
set_source_files_properties(
21+
"${CMAKE_CURRENT_LIST_DIR}/src/adspimgs.S"
22+
OBJECT_DEPENDS
23+
${HIFI4_BUILD_DIR}/zephyr.elf
24+
)

‎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
3+
4+
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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