static void blink_led(void) { /* If the addressable LED is enabled */ if (s_led_state) { /* Set the LED pixel using RGB from 0 (0%) to 255 (100%) for each color */ led_strip_set_pixel(led_strip, 0, 16, 16, 16); /* Refresh the strip to send data */ led_strip_refresh(led_strip); } else { /* Set all LED off to clear all pixels */ led_strip_clear(led_strip); } } static void configure_led(void) { ESP_LOGI(TAG, "Example configured to blink addressable LED!"); /* LED strip initialization with the GPIO and pixels number*/ led_strip_config_t strip_config = { .strip_gpio_num = BLINK_GPIO, .max_leds = 1, // at least one LED on board }; led_strip_rmt_config_t rmt_config = { .resolution_hz = 10 * 1000 * 1000, // 10MHz }; ESP_ERROR_CHECK(led_strip_new_rmt_device(&strip_config, &rmt_config, &led_strip)); /* Set all LED off to clear all pixels */ led_strip_clear(led_strip); } #elif CONFIG_BLINK_LED_GPIO static void blink_led(void) { /* Set the GPIO level according to the state (LOW or HIGH)*/ gpio_set_level(BLINK_GPIO, s_led_state); } static void configure_led(void) { ESP_LOGI(TAG, "Example configured to blink GPIO LED!"); gpio_reset_pin(BLINK_GPIO); /* Set the GPIO as a push/pull output */ gpio_set_direction(BLINK_GPIO, GPIO_MODE_OUTPUT); } #endif void app_main(void) { /* Configure the peripheral according to the LED type */ configure_led(); while (1) { ESP_LOGI(TAG, "Turning the LED %s!", s_led_state == true ? "ON" : "OFF"); blink_led(); /* Toggle the LED state */ s_led_state = !s_led_state; vTaskDelay(CONFIG_BLINK_PERIOD / portTICK_PERIOD_MS); } }

解释代码void LedOn(GPIO_Module* GPIOx, uint16_t Pin) { GPIOx->PBSC = Pin; } /** * @brief Turns selected Led Off. * @param GPIOx x can be A to G to select the GPIO port. * @param Pin This parameter can be GPIO_PIN_0~GPIO_PIN_15. / void LedOff(GPIO_Module GPIOx, uint16_t Pin) { GPIOx->PBC = Pin; } /** * @brief Turns selected Led on or off. * @param GPIOx x can be A to G to select the GPIO port. * @param Pin This parameter can be one of the following values: * @arg GPIO_PIN_0~GPIO_PIN_15: set related pin on * @arg (GPIO_PIN_0<<16)~(GPIO_PIN_15<<16): clear related pin off / void LedOnOff(GPIO_Module GPIOx, uint32_t Pin) { GPIOx->PBSC = Pin; } /** * @brief Toggles the selected Led. * @param GPIOx x can be A to G to select the GPIO port. * @param Pin This parameter can be GPIO_PIN_0~GPIO_PIN_15. / void LedBlink(GPIO_Module GPIOx, uint16_t Pin) { GPIOx->POD ^= Pin; } /** * @brief Assert failed function by user. * @param file The name of the call that failed. * @param line The source line number of the call that failed. / #ifdef USE_FULL_ASSERT void assert_failed(const uint8_t expr, const uint8_t* file, uint32_t line) { while (1) { } } #endif // USE_FULL_ASSERT /** * @brief Main program. / int main(void) { /SystemInit() function has been called by startup file startup_n32g45x.s/ / Initialize Led1~Led5 as output pushpull mode/ LedInit(PORT_GROUP1, LED1_PIN | LED2_PIN); LedInit(PORT_GROUP2, LED3_PIN | LED4_PIN | LED5_PIN); /Turn on Led1/ LedOn(PORT_GROUP1, LED1_PIN); while (1) { /LED1_PORT and LED2_PORT are the same port group.Enable Led2 blink and not effect Led1 by Exclusive-OR * operation./ LedBlink(PORT_GROUP1, LED2_PIN); /LED3_PORT, LED4_PORT and LED5_PORT are the same port group./ /Turn Led4 and Led5 off and not effect other ports by PBC register,correspond to * PORT_GROUP2->POD&=~(LED4_PIN|LED5_PIN);/ LedOff(PORT_GROUP2, LED4_PIN | LED5_PIN); / Insert delay / Delay(0x28FFFF); /Turn Led4 and Led5 on,turn Led3 off and not effect other ports by PBSC register,correspond to * PORT_GROUP2->POD&=~(LED3_PIN),then PORT_GROUP2->POD|=(LED4_PIN|LED5_PIN);/ LedOnOff(PORT_GROUP2, (LED3_PIN << 16) | LED4_PIN | LED5_PIN); / Insert delay / Delay(0x28FFFF); /Turn on Led3/ LedOn(PORT_GROUP2, LED3_PIN); / Insert delay */ Delay(0x28FFFF); } }

1. void LedOn(GPIO_Module* GPIOx, uint16_t Pin)：该函数用于将指定的LED打开，通过设置GPIO相应的引脚控制寄存器来实现。传入参数GPIOx表示GPIO模块，Pin表示要打开的LED引脚。 2. void LedOff(GPIO_...

#define BLINK_GPIO CONFIG_BLINK_GPIO static uint8_t s_led_state = 0; #ifdef CONFIG_BLINK_LED_RMT static led_strip_handle_t led_strip;

同时定义了一个名为 s_led_state 的 uint8_t 类型的变量，初始值为 0。 #ifdef CONFIG_BLINK_LED_RMT 表示如果定义了宏 CONFIG_BLINK_LED_RMT，则执行下面的代码。在这段代码中，定义了一个名为 led_strip 的 led_...

vTaskDelay(CONFIG_BLINK_PERIOD / portTICK_PERIOD_MS);

其中，CONFIG_BLINK_PERIOD 是一个宏定义，表示 LED 灯闪烁的周期时间，单位为毫秒。portTICK_PERIOD_MS 是 FreeRTOS 操作系统的时基，表示一次 tick 的时间，也是以毫秒为单位。vTaskDelay() 函数的作用是让当前...

编写SampleApp_MessageMSGCB数据消息队列处理的回调函数, Z-Stack的API函数直接传参数即可。 #define HAL_LED_2 0x02 void SampleApp_MessageMSGCB( afIncomingMSGPacket_t *pkt ) { ____________________________; //声明并初始化7个字节的缓冲区 switch ( pkt->clusterId ) { case SAMPLEAPP_PERIODIC_CLUSTERID: //将接收到的数据复制到缓冲区 //判断是不是NEWLab这6个字符 if( ) { //若是NEWLab这6个字符，使LED2闪烁 } else { //若不是NEWLab这6个字符，则点亮LED2 } break; default: break; } }

// If the first 6 bytes are "NEWLab", make LED2 blink HalLedBlink(HAL_LED_2, 4, 50, 500); } else { // If the first 6 bytes are not "NEWLab", turn on LED2 HalLedSet(HAL_LED_2, HAL_LED_MODE_ON); ...

You are required to write a C program to: • Initialize GPIO peripherals • Initialise UART peripheral for receiving ASCII characters ‘A’ to ‘Z’ at baud 9600 • Initialise an internal array to hold 10 characters with head and tail: CharBuff • Repeat the following:o When data is received on the serial communication port, read ASCII character X, o If received character X is a capital letter add it to CharBuff, else ignore. o While CharBuff is not empty, transmit the morse code of the oldest stored character by blinking the LED (code provided for you). o When CharBuff is full, disable UART RX. o If UART RX is disabled, pushing the button P_B1 will activate it; otherwise, pushing the button does not affect your programme. You are recommended to use interrupt to control UART receiving data and coordinate the operation between CharBuff and P_LD2. 在我的代码基础上完成以上任务#include #include <gpio.h> #include "delay.h" #include "uart.h" #include <stm32f4xx.h> /* ***NOTE* YOU CAN USE THE IN-UILT FUNCTION delay_ms(HOW_LONG) TO CAUSE A DELAY OF HOW_LONG MILLI SECONDS ********************************* / //placeholder /void uart_rx_isr(uint8_t rx){ }/ #define MAX 10 int uart_rx_enabled = 1; char CharBuff[MAX]; int head = 0; int tail = 0; int is_full() { return (tail + 1) % MAX == head; } int is_empty() { return head == tail; } void add_to_buffer(char c) { if (!is_full()) { CharBuff[tail] = c; tail = (tail + 1) % MAX; } else { uart_rx_enabled = 0; //uart_disable(); } } void uart_rx_isr(uint8_t c){ if (c >= 'A' && c <= 'Z') { if (!is_full()) { CharBuff[tail] = c; tail = (tail + 1) % MAX; } else { uart_rx_enabled = 0; //uart_disable(); } } } char remove_from_buffer() { char c = CharBuff[head]; head = (head + 1) % MAX; if (uart_rx_enabled == 0 && !is_full()) {//The buffer is not full after removing a char uart_rx_enabled = 1;//enable the Uart RX uart_enable(); } return c; } int main(void) { // Initialise GPIO. gpio_set_mode(P_LD2, Output); gpio_set_mode(P_B1, PullUp); // hardware/peripheral initialisation uart_init(9600); uart_enable(); uart_set_rx_callback(uart_rx_isr);//This callback function is triggered when data is received through the serial port while(1){ if(!is_empty()){ gpio_set(P_LD2, LED_ON); char c = remove_from_buffer(); } } } // ARM University Program Copyright © ARM Ltd 2016 ******** // * Queen Mary University of London Copyright Matthew Tang 2021 ****

if (gpio_get(P_B1) == 0 && uart_rx_enabled == 0) { // If button is pushed and UART RX is disabled, re-enable UART RX uart_rx_enabled = 1; uart_enable(); } } } 该程序初始化GPIO和UART硬件模块...

介绍一下代码STATE_RED_BLINK: begin // Pedestrian blink ped_state <= 2'b01; ped_red <= blink_timer[3]; ped_green <= 0; // Countdown display num_high_bit <= 4'b1111; num_low_bit <= 4'b1111; // Set traffic lights led_r <= 1; led_y <= 0; led_g <= 0; // Check for button presses if (key1) begin state <= STATE_PREPARE; timer <= YELLOW_TIME; blink_timer <= 0; end else if (key3) begin state <= STATE_GO; timer <= GREEN_TIME; blink_timer <= 0; end else if (key2) begin state <= STATE_STOP; timer <= 0; blink_timer <= 0; end // Check timer if (timer == 0) begin state <= STATE_STOP; timer <= YELLOW_TIME; blink_timer <= 0; end // Count blink timer if (blink_timer > 0) begin blink_timer <= blink_timer - 1; end end

2.将行人灯红色LED的状态设置为闪烁计时器的第3位（ped_red <= blink_timer[3]）。 3.将行人灯绿色LED的状态设置为关闭（ped_green ）。 4.将倒计时数字的高位和低位设置为全1（num_high_bit ; num_low_bit ;）。 ...

介绍一下代码// Internal registers reg [1:0] state = STATE_STOP; // Current state reg [31:0] timer = 0; // Timer for state reg [1:0] ped_state = 2'b00; // Pedestrian state (green or red) reg [3:0] blink_timer = 0; // Timer for blinking pedestrian red

4. blink_timer：用于计时，表示行人信号灯闪烁的时间。初始值为 0，单位为微秒（us）。这些内部寄存器可以方便程序中其他部分的使用，例如在控制交通灯状态转换时，可以根据这些状态和计时器来实现状态机的自动...

修改下述程序，实现用定时器0定时，使得LED灯每1ms闪烁一次：// // INT0---P3.2 ---connect to a button // when the button is pressed, the LED changes between fast blink and slow blink // ------CH 2021.7.29 //******************************************************* #include "STC32G.h" #include "stdio.h" #include "intrins.h" typedef unsigned char u8; typedef unsigned int u16; typedef unsigned long u32; #define MAIN_Fosc 24000000UL //========================================================================== // sbit INT1 = P3^3; bit flag=0; // /* function declaration / void delay_ms(u8 ms); / Main function****/ void main(void) { u8 i; WTST = 0; P0M1 = 0x00; P0M0 = 0x00; //IO set up P1M1 = 0x00; P1M0 = 0x00; P2M1 = 0x00; P2M0 = 0x00; P3M1 = 0x0f; P3M0 = 0x00; P4M1 = 0xff; P4M0 = 0x00; P5M1 = 0x00; P5M0 = 0x00; P6M1 = 0x00; P6M0 = 0x00; P7M1 = 0x00; P7M0 = 0x00; EX0 = 1; //interrupt enable EA = 1; //all interrupt enable IT0=1; // edge trigger while(1) { if(flag==0) { i=1000; } else {i=10; } P2=0xff; delay_ms(i); P2=0x00; delay_ms(i); } } //======================================================================== void delay_ms(u8 ms) { u16 i; do{ i = MAIN_Fosc / 6000; while(--i); }while(--ms); } /* INT0***************/ void INT0_int (void) interrupt 0 { flag=~flag; }

下面是修改后的程序，使用定时器0实现LED每1ms闪烁一次： c #include "STC32G.h" #include "stdio.h" #include "intrins.h" typedef unsigned char u8; typedef unsigned int u16; typedef unsigned long u32; ...

for( i = E_LED_GPIO_LED1; i < E_LED_GPIO_MAX; i++ ) { device_led_control( i, E_LED_STATE_OFF ); device_led_config_blink( _enled_type, i, E_LED_STATE_OFF, 0, 500, 500 ); }

2. device_led_config_blink(_enled_type, i, E_LED_STATE_OFF, 0, 500, 500)：该函数用于配置LED灯的闪烁模式，第一个参数表示LED灯的类型，第二个参数表示要配置的LED灯的编号，第三个参数表示闪烁模式开始时的...

解释一下代码STATE_GO: begin // Pedestrian green ped_state <= 2'b10; ped_red <= 0; ped_green <= 1; // Countdown display if (count_timer == 0) begin count <= count - 1; count_timer <= 20000000; end num_high_bit <= count / 10; num_low_bit <= count % 10; // Set traffic lights led_r <= 0; led_y <= 0; led_g <= 1; // Check for button presses if (key1) begin state <= STATE_PREPARE; timer <= YELLOW_TIME; end else if (key3) begin state <= STATE_GO; timer <= GREEN_TIME; end else if (key2) begin state <= STATE_STOP; timer <= 0; end // Check for pedestrian crossings if (ped_state == 2'b10 && blink_timer == 0 && key1) begin state <= STATE_RED_BLINK; timer <= RED_TIME; blink_timer <= 2000000; end // Check timer if (timer == 0) begin state <= STATE_STOP; timer <= YELLOW_TIME; end end

接着，代码设置交通灯为绿灯，检查按钮是否按下，如果按下了key1，则表示有行人想要过马路，此时切换到STATE_RED_BLINK状态，表示行人红灯闪烁状态，同时设置计时器为红灯时间，并设置闪烁计时器。如果计时器结束，...

通过ubuntu里的vscode实现通过LED_STATE变量控制灯的亮灭，led_switch(LED_STATE)

将led_blink.c文件中的代码修改为以下代码，以便使用LED_STATE变量控制LED灯的亮灭： #include "stm32f4xx.h" #define LED_STATE 1 void led_switch(int state) { if (state) { // Turn on LED GPIOA->...

这是什么问题main.c(40): error C267: 'led_blink_off': requires ANSI-style prototype

这个错误是因为函数 led_blink_off 没有在之前声明时指定参数类型，在使用该函数时编译器无法确定参数类型。要解决这个问题，可以在函数 led_blink_off 的前面加上函数声明，指定参数类型，例如： c void ...

写一个IMX6uLL LED闪烁的驱动程序

/* Blink the LED */ while (!kthread_should_stop()) { gpio_val = readl(gpio_base + GPIO_DR_OFFSET); gpio_val ^= (1 << LED_GPIO_PIN); writel(gpio_val, gpio_base + GPIO_DR_OFFSET); msleep(500); } ...

解释一下代码// State machine states localparam STATE_STOP = 2'b00; // Stop state localparam STATE_PREPARE = 2'b01; // Prepare state localparam STATE_GO = 2'b10; // Go state localparam STATE_RED_BLINK = 2'b11; // Red blink state

4. STATE_RED_BLINK：表示交通灯控制器处于红灯闪烁状态，此时红灯闪烁，用于提示行人或车辆不能通行。这些状态可以方便程序中其他部分的使用，例如在控制交通灯状态转换时，可以根据这些状态来实现状态机的自动...

while (1) { ESP_LOGI(TAG, "Turning the LED %s!", s_led_state == true ? "ON" : "OFF"); blink_led(); /* Toggle the LED state */ s_led_state = !s_led_state; vTaskDelay(CONFIG_BLINK_PERIOD / portTICK_PERIOD_MS); }

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#define BLINK_GPIO CONFIG_BLINK_GPIO static uint8_t s_led_state = 0; #ifdef CONFIG_BLINK_LED_RMT static led_strip_handle_t led_strip;

vTaskDelay(CONFIG_BLINK_PERIOD / portTICK_PERIOD_MS);

介绍一下代码// Internal registers reg [1:0] state = STATE_STOP; // Current state reg [31:0] timer = 0; // Timer for state reg [1:0] ped_state = 2'b00; // Pedestrian state (green or red) reg [3:0] blink_timer = 0; // Timer for blinking pedestrian red

for( i = E_LED_GPIO_LED1; i < E_LED_GPIO_MAX; i++ ) { device_led_control( i, E_LED_STATE_OFF ); device_led_config_blink( _enled_type, i, E_LED_STATE_OFF, 0, 500, 500 ); }

通过ubuntu里的vscode实现通过LED_STATE变量控制灯的亮灭，led_switch(LED_STATE)

这是什么问题main.c(40): error C267: 'led_blink_off': requires ANSI-style prototype

写一个IMX6uLL LED闪烁的驱动程序

解释一下代码// State machine states localparam STATE_STOP = 2'b00; // Stop state localparam STATE_PREPARE = 2'b01; // Prepare state localparam STATE_GO = 2'b10; // Go state localparam STATE_RED_BLINK = 2'b11; // Red blink state

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