PWM没有波形

疑难解答
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1

void LED_BIG_Init(void)
{

// 配置信号引脚 (PA1) 为 GPTIM2_CH1 复用模式
HAL_PIN_Set(PAD_PA00 + LED_BIG_PIN, GPTIM2_CH1, PIN_NOPULL, 1);

HAL_RCC_EnableModule(RCC_MOD_GPTIM2);

// ================= 定时器基础配置 =================
gpt_led_big.Instance = (GPT_TypeDef *)LED_BIG_TIM;
gpt_led_big.core = CORE_ID_HCPU;            
gpt_led_big.Channel = HAL_GPT_ACTIVE_CHANNEL_CLEARED;

gpt_led_big.Init.Prescaler = LED_BIG_PSC;    // PSC: 24MHz / 24 = 1MHz
gpt_led_big.Init.CounterMode = GPT_COUNTERMODE_UP;
gpt_led_big.Init.Period = LED_BIG_ARR;        // ARR: 1MHz / 1000 = 1kHz

if (HAL_GPT_Base_Init(&gpt_led_big) != HAL_OK) {
    rt_kprintf("[LED] GPT Base Init Failed!\n");
    return;
}


GPT_ClockConfigTypeDef clock_config = {0};
clock_config.ClockSource = GPT_CLOCKSOURCE_INTERNAL;
if (HAL_GPT_ConfigClockSource(&gpt_led_big, &clock_config) != HAL_OK) {
    rt_kprintf("[LED] GPT Clock Config Failed!\n");
    return;
}

// ================= PWM 模式初始化 =================
if (HAL_GPT_PWM_Init(&gpt_led_big) != HAL_OK) {
    rt_kprintf("[LED] GPT PWM Init Failed!\n");
    return;
}


GPT_OC_InitTypeDef oc_config = {0};
oc_config.OCMode = GPT_OCMODE_PWM1;

Pulse = (ARR + 1) * LED_BIG_DUTY_CYCLE / 100
oc_config.Pulse = (uint32_t)((LED_BIG_ARR + 1) * LED_BIG_DUTY_CYCLE / 100);  

oc_config.OCPolarity = GPT_OCPOLARITY_HIGH;
oc_config.OCFastMode = GPT_OCFAST_DISABLE;

if (HAL_GPT_PWM_ConfigChannel(&gpt_led_big, &oc_config, LED_BIG_TIM_CHANNEL) != HAL_OK) {
    rt_kprintf("[LED] GPT Channel Config Failed!\n");
    return;
}


if (HAL_GPT_PWM_Start(&gpt_led_big, LED_BIG_TIM_CHANNEL) != HAL_OK) {
    rt_kprintf("[LED] GPT PWM Start Failed!\n");
    return;
}

rt_kprintf("Simple PWM Driver Initialized (Freq: 1kHz, Duty: %d%%)\n", LED_BIG_DUTY_CYCLE);

}

同样的这个代码，我原来配置的LED_BIG_PIN为20（PA20）就是正常有波形，现在换成1（PA1）就发现示波器测不到波形了，想问一下是PA1不能配定时器2通道1吗，但是看数据手册又是可以的。