A microcontroller with a 5V supply is programmed to generate a pulse width modulated (PWM) output with a frequency of 100Hz and a duty cycle of 20%.What is the pulse width of the PWM output?

The pulse width of the PWM output can be calculated as follows:

Period (T) = 1/frequency = 1/100Hz = 0.01s

Duty Cycle = On Time / Period

On Time = Duty Cycle * Period

On Time = 0.20 * 0.01s = 0.002s

Therefore, the pulse width of the PWM output is 0.002 seconds or 2 milliseconds.

相关问题

Please write a C language file that will write a group of numbers into eeprom as a digital IC designer. I hope this C language file is general and detaile

Sure, here's an example C program that demonstrates how to write a group of numbers into the EEPROM memory using the I2C protocol. This code is written for the ATmega328P microcontroller, but it can be easily adapted for other microcontrollers.

#include <avr/io.h>
#include <util/delay.h>
#include <avr/eeprom.h>
#include <avr/interrupt.h>

#define SLAVE_ADDR 0xA0 // Slave device address

void i2c_init(void) {
  TWSR = 0x00; // Set prescaler to 1
  TWBR = ((F_CPU / 100000UL) - 16) / 2; // Set bit rate generator
  TWCR = (1 << TWEN); // Enable I2C module
}

void i2c_start(void) {
  TWCR = (1 << TWINT) | (1 << TWSTA) | (1 << TWEN);
  while (!(TWCR & (1 << TWINT)));
}

void i2c_stop(void) {
  TWCR = (1 << TWINT) | (1 << TWSTO) | (1 << TWEN);
}

void i2c_write(uint8_t data) {
  TWDR = data;
  TWCR = (1 << TWINT) | (1 << TWEN);
  while (!(TWCR & (1 << TWINT)));
}

void eeprom_write(uint16_t addr, uint8_t data) {
  i2c_start();
  i2c_write(SLAVE_ADDR | ((addr >> 8) & 0x07));
  i2c_write(addr & 0xFF);
  i2c_write(data);
  i2c_stop();
  _delay_ms(10);
}

int main(void) {
  uint16_t addr = 0x0000; // Starting address in EEPROM
  uint8_t data[] = {0x01, 0x02, 0x03, 0x04, 0x05}; // Data to be written

  cli(); // Disable interrupts
  i2c_init(); // Initialize I2C module

  for (int i = 0; i < sizeof(data); i++) {
    eeprom_write(addr++, data[i]); // Write data to EEPROM
  }

  sei(); // Enable interrupts
  return 0;
}

In this code, the `i2c_init()` function initializes the I2C module, `i2c_start()` and `i2c_stop()` functions send start and stop signals respectively, `i2c_write()` function writes data to the I2C bus, and `eeprom_write()` function writes a byte of data to the EEPROM memory at a specified address.

You can modify this code to write any group of numbers to the EEPROM memory. Just update the `data` array with your desired numbers and adjust the `addr` variable to point to the starting address in EEPROM where you want to write the data.

keil5 error: a9511e

Keil5 error: a9511e是Keil MDK（Microcontroller Development Kit）中的一个错误代码。该错误代码表示在编译过程中发生了语法错误或者语义错误。

具体来说，a9511e错误通常是由于以下原因之一引起的：
1. 语法错误：代码中存在语法错误，如拼写错误、缺少分号等。
2. 类型不匹配：变量或函数的类型不匹配，例如将一个整数赋值给一个指针变量。
3. 未声明的标识符：使用了未声明的变量、函数或对象。
4. 缺少头文件：没有包含必要的头文件，导致编译器无法识别某些类型或函数。

要解决a9511e错误，您可以尝试以下几个步骤：
1. 检查代码：仔细检查代码中是否存在拼写错误、缺少分号等语法错误。
2. 检查类型匹配：确保变量或函数的类型匹配，避免将不同类型的值进行赋值或比较。
3. 声明标识符：确保使用的变量、函数或对象已经在代码中进行了声明。
4. 包含头文件：检查是否包含了必要的头文件，以便编译器能够正确识别类型和函数。

如果以上步骤都没有解决问题，您可以尝试搜索该错误代码的具体含义和解决方法，或者向Keil官方技术支持寻求帮助。