How do I install the Timers Pwm Baremetal skill?

Run npx skillmds add mohitmishra786/timers-pwm-baremetal in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Timers Pwm Baremetal safe to use?

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This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Timers Pwm Baremetal free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Timers Pwm Baremetal?

mohitmishra786 (@mohitmishra786) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Timers Pwm Baremetal by mohitmishra786

Name: Timers Pwm Baremetal
Rating: 4.666666666666667 (3 reviews)
Author: mohitmishra786

Timers Pwm Baremetal

Bare-metal timer and PWM skill. Use when configuring general-purpose timers for PWM, input capture, or periodic ticks without RTOS. Activates on queries about timer prescaler, PWM duty cycle, input capture, or SysTick bare-metal.

File contents

Timers and PWM (Bare-Metal)

Purpose

Configure MCU timers for PWM output, input capture, and periodic scheduling: prescaler/ARR setup, compare channels, and SysTick as a simple tick source.

When to Use

Motor/LED dimming via PWM
Measuring pulse width (input capture)
Bare-metal millis() without FreeRTOS
Hardware periodic sampling trigger

Workflow

1. PWM on TIM2 CH1 (STM32)

f_pwm = f_timer_clk / ((PSC+1) * (ARR+1))
duty = (CCR / (ARR+1)) * 100%

RCC->APB1ENR |= RCC_APB1ENR_TIM2EN;

TIM2->PSC  = 83;      /* 84MHz / 84 = 1 MHz tick */
TIM2->ARR  = 999;     /* 1 kHz PWM */
TIM2->CCR1 = 500;     /* 50% duty */
TIM2->CCMR1 |= (6U << TIM_CCMR1_OC1M_Pos);  /* PWM mode 1 */
TIM2->CCER  |= TIM_CCER_CC1E;
TIM2->CR1   |= TIM_CR1_CEN;

GPIO: PA0 AF1 TIM2_CH1.

2. SysTick tick

volatile uint32_t tick_ms;

void SysTick_Handler(void) {
    tick_ms++;
}

void systick_init(uint32_t hz) {
    SysTick_Config(SystemCoreClock / hz);
}

3. Input capture

Configure channel in CCMR as input, set CCER polarity, read CCR on interrupt when edge captured.

4. Agent usage

/timers-pwm-baremetal 1 kHz 25% duty PWM on TIM2 channel 1

Common Problems

Symptom	Cause	Fix
Wrong frequency	APB timer clock doubling	Check RM timer clock x2 rule
No PWM output	CCER/CCMR not enabled	Enable channel output
Jittery tick	SysTick overridden	One owner for SysTick

Related Skills

skills/baremetal/gpio-baremetal — timer pin AF
skills/embedded/freertos — replace SysTick with RTOS tick
skills/baremetal/adc-dac-baremetal — timer TRGO for ADC trigger

---name: timers-pwm-baremetaldescription: Bare-metal timer and PWM skill. Use when configuring general-purpose timers for PWM, input capture, or periodic ticks without RTOS. Activates on queries about timer prescaler, PWM duty cycle, input capture, or SysTick bare-metal.--- # Timers and PWM (Bare-Metal) ## Purpose Configure MCU timers for PWM output, input capture, and periodic scheduling: prescaler/ARR setup, compare channels, and SysTick as a simple tick source. ## When to Use - Motor/LED dimming via PWM - Measuring pulse width (input capture) - Bare-metal `millis()` without FreeRTOS - Hardware periodic sampling trigger ## Workflow ### 1. PWM on TIM2 CH1 (STM32) ``` f_pwm = f_timer_clk / ((PSC+1) * (ARR+1)) duty = (CCR / (ARR+1)) * 100% ``` ```c RCC->APB1ENR |= RCC_APB1ENR_TIM2EN; TIM2->PSC = 83; /* 84MHz / 84 = 1 MHz tick */ TIM2->ARR = 999; /* 1 kHz PWM */ TIM2->CCR1 = 500; /* 50% duty */ TIM2->CCMR1 |= (6U << TIM_CCMR1_OC1M_Pos); /* PWM mode 1 */ TIM2->CCER |= TIM_CCER_CC1E; TIM2->CR1 |= TIM_CR1_CEN; ``` GPIO: PA0 AF1 TIM2_CH1. ### 2. SysTick tick ```c volatile uint32_t tick_ms; void SysTick_Handler(void) { tick_ms++; } void systick_init(uint32_t hz) { SysTick_Config(SystemCoreClock / hz); } ``` ### 3. Input capture Configure channel in `CCMR` as input, set `CCER` polarity, read `CCR` on interrupt when edge captured. ### 4. Agent usage ``` /timers-pwm-baremetal 1 kHz 25% duty PWM on TIM2 channel 1 ``` ## Common Problems | Symptom | Cause | Fix | |---------|-------|-----| | Wrong frequency | APB timer clock doubling | Check RM timer clock x2 rule | | No PWM output | CCER/CCMR not enabled | Enable channel output | | Jittery tick | SysTick overridden | One owner for SysTick | ## Related Skills - `skills/baremetal/gpio-baremetal` — timer pin AF - `skills/embedded/freertos` — replace SysTick with RTOS tick - `skills/baremetal/adc-dac-baremetal` — timer TRGO for ADC trigger

Frequently asked questions