一、说明
AI-Talk开发板上有一颗用户LED，连接在CH32 PA2管脚，低电平亮，高电平灭。
相关电路图如下：
二、工程
1、创建项目
进入snap/examples/目录，执行创建项目的命令：
lisa zep create? 选择sample. (`左右键/空格键` 展开文件夹，`回车键` 确定选择)
→ display
→ [display_kscan]
→ [dma_memcpy]
→ [entropy]
→ [exmcu_adc]
↓ [exmcu_gpio_led]
→ [exmcu_pwm]
→ [gpio_led]
→ [hwinfo]
→ i2c选择exmcu_gpio_led，然后确定。此时examples目录下有一个exmcu_gpio_led的工程，目录结构如下：
2、配置文件
prj.conf配置文件中已经打开了GPIO_CSK6_CH32V003的配置：
CONFIG_GPIO_CSK6_CH32V003=y3、设备树
设备树文件csk6011a_nano.dts中已经有led0的配置，但是gpio和AI-Talk开发板不一致。这里在项目下创建一个设备树覆盖文件，重新配置led0
在hello_world根目录下创建boards目录，并增加csk6011a_nano.overlay设备树配置文件：
exmcu_gpio_led
├─boards //设备树板型文件
└─csk6011a_nano.overlay //设备树配置文件
...在csk6011a_nano.overlay文件中添加控制 led 的 GPIO 配置和ch32v003的配置，具体内容如下：
#include <zephyr/dt-bindings/adc/adc.h>
/ /*根节点*/
{
/*定义别名为led0的gpio设备树*/
aliases {
led0 = &board_led_0_label;/* led0别名映射到led0设备树node label */
csk6-exmcu = &csk6_ch32v003;
};
leds {
compatible = "gpio-leds";/* 设置led设备树的ymal绑定文件 */
board_led_0_label: board_led_0_nodeid { /* node label和node id，皆可自定义命名 */
gpios = <&exgpioa 2 GPIO_ACTIVE_LOW>; /* GPIO逻辑电平模式设置 */
label = "User LED0"; /* 节点的 label 属性，通过传入device_get_binding()接口可以获取gpio设备实例 */
};
};
};
&pinctrl {
pinctrl_i2c1_scl_default: i2c1_scl_default{
pinctrls = <I2C1_SCL_GPIOB_09>;
};
pinctrl_i2c1_sda_default: i2c1_sda_default{
pinctrls = <I2C1_SDA_GPIOB_08>;
};
};
&i2c1 {
status = "okay";
pinctrl-0 = <&pinctrl_i2c1_scl_default &pinctrl_i2c1_sda_default>;
pinctrl-names = "default";
csk6_ch32v003: csk6_ch32v003@6c {
/**
* Please make sure that the external MCU firmware has been loaded
* SCL --> external MCU PC5
* SDA --> external MCU PC6
*/
compatible = "listenai,csk-i2c-ch32v003";
reg = <0x6c>;
status = "okay";
#address-cells = <1>;
#size-cells = <0>;
/* CH32V003-GPIOA */
exgpioa: gpio@0 {
compatible = "listenai,csk-gpio-ch32003-port";
reg = <0x00>;
status = "okay";
ngpios = <8>;
#gpio-cells = <2>;
gpio-controller;
pin_mask = <0x00>;
};
/* CH32V003-GPIOB */
exgpiob: gpio@1 {
compatible = "listenai,csk-gpio-ch32003-port";
reg = <0x01>;
status = "okay";
ngpios = <8>;
#gpio-cells = <2>;
gpio-controller;
pin_mask = <0x00>;
};
/* CH32V003-GPIOC */
exgpioc: gpio@2 {
compatible = "listenai,csk-gpio-ch32003-port";
reg = <0x02>;
status = "okay";
ngpios = <8>;
#gpio-cells = <2>;
gpio-controller;
pin_mask = <0x00>;
};
/* CH32V003-GPIOD */
exgpiod: gpio@3 {
compatible = "listenai,csk-gpio-ch32003-port";
reg = <0x03>;
status = "okay";
ngpios = <8>;
#gpio-cells = <2>;
gpio-controller;
pin_mask = <0x00>;
};
exadc: adc@4 {
/**
* external adc channel map
*
* CH0 --> PA2
* CH1 --> PA1
* CH2 --> PC4
* CH3 --> PD2
* CH4 --> PD3
* CH5 --> PD5
* CH6 --> PD6
* CH7 --> PD4
*
*/
compatible = "listenai,csk-adc-ch32v003";
reg = <0x4>;
status = "okay";
#io-channel-cells = <1>;
#address-cells = <1>;
#size-cells = <0>;
channel@2 {
reg = <2>;
zephyr,gain = "ADC_GAIN_1";
zephyr,reference = "ADC_REF_INTERNAL";
zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
zephyr,resolution = <10>;
};
};
expwm: pwm-controller@5 {
compatible = "listenai,csk-ch32v003-pwm";
reg = <0x5>;
status = "okay";
clock-prescaler = <480>;
clock-frequency = <48000000>;
#pwm-cells = <4>;
};
};
};4、 代码
不使用main.c的代码，重新编写代码：
#include <zephyr/zephyr.h>
#include <zephyr/drivers/gpio.h>
/* 1000 msec = 1 sec */
#define SLEEP_TIME_MS 1000
/* 通过别名获取 "led0" 设备树 node id */
#define LED0_NODE DT_ALIAS(led0)
/* 通过 node id 获取 led0 设备树信息 */
static const struct gpio_dt_spec led = GPIO_DT_SPEC_GET(LED0_NODE, gpios);
void main(void)
{
printk("Hello World! %s\n", CONFIG_BOARD);
int ret;
/* 检查硬件设备是否就绪 */
if (!device_is_ready(led.port)) {
return;
}
/* 将GPIO配置为输出并将其初始化为逻辑电平1 */
ret = gpio_pin_configure_dt(&led, GPIO_OUTPUT_ACTIVE);
if (ret < 0) {
return;
}
while (1) {
/* GPIO电平反转控制 */
ret = gpio_pin_toggle_dt(&led);
if (ret < 0) {
return;
}
k_msleep(SLEEP_TIME_MS);
}
}三、编译
在hello_world目录下执行编译命令：
lisa zep build -b csk6011a_nano四、运行
连接AI-Talk开发板的调试接口，PC端运行终端软件可以接收到如下日志：
[00:00:00.000,000] <inf> csk6_exmcu_i2c: exmcu addr:0x6C
[00:00:00.046,000] <inf> csk6_exmcu_i2c: exmcu info, chip type:ch32v003, ver:1.3
*** Booting Zephyr OS build zephyr-v3.4.0-46-gb8fcc47cc045 ***
*** ListenAI CSK SDK Version: 2.0.0.0-f097b7f9df ***
Hello World! csk6011a_nano开发板上LED1会一致闪烁，频率0.5Hz。
标签：exmcu,led,led0,AI,cells,LED,--,gpio,Talk From： https://blog.csdn.net/professionalmcu/article/details/141885395