timer_ocintpara.outputstate = TIMER_CCX_ENABLE; // 主输出通道开启 timer_ocintpara.outputnstate = TIMER_CCXN_DISABLE; // 互补输出通道关闭 timer_ocintpara.ocpolarity = TIMER_OC_POLARITY_HIGH; // 主输出极性高电平有效 timer_ocintpara.ocnpolarity = TIMER_OCN_POLARITY_HIGH; // 互补输出极性高电平有效 timer_ocintpara.ocidlestate = TIMER_OC_IDLE_STATE_LOW; // 主输出空闲状态为低电平 timer_ocintpara.ocnidlestate = TIMER_OCN_IDLE_STATE_LOW; // 互补输出空闲状态为低电平 timer_channel_output_config(TIMER2, TIMER_CH_1, &timer_ocintpara); timer_channel_output_pulse_value_config(TIMER2, TIMER_CH_1, 500); // PWM 脉冲宽度为 500 timer_channel_output_mode_config(TIMER2, TIMER_CH_1, TIMER_OC_MODE_PWM0); // PWM0 模式 timer_channel_output_shadow_config(TIMER2, TIMER_CH_1, TIMER_OC_SHADOW_DISABLE); // 关闭输出通道的预装载功能
时间: 2023-09-12 18:10:36 浏览: 809
这段代码是使用定时器2的通道1来生成PWM信号的配置代码。下面是对每个配置项的解释:
- `timer_ocintpara.outputstate = TIMER_CCX_ENABLE;`:主输出通道开启。
- `timer_ocintpara.outputnstate = TIMER_CCXN_DISABLE;`:互补输出通道关闭。
- `timer_ocintpara.ocpolarity = TIMER_OC_POLARITY_HIGH;`:主输出极性高电平有效。
- `timer_ocintpara.ocnpolarity = TIMER_OCN_POLARITY_HIGH;`:互补输出极性高电平有效。
- `timer_ocintpara.ocidlestate = TIMER_OC_IDLE_STATE_LOW;`:主输出空闲状态为低电平。
- `timer_ocintpara.ocnidlestate = TIMER_OCN_IDLE_STATE_LOW;`:互补输出空闲状态为低电平。
- `timer_channel_output_config(TIMER2, TIMER_CH_1, &timer_ocintpara);`:配置定时器2的通道1的输出参数。
接下来是对PWM信号的具体配置:
- `timer_channel_output_pulse_value_config(TIMER2, TIMER_CH_1, 500);`:设置PWM脉冲宽度为500。
- `timer_channel_output_mode_config(TIMER2, TIMER_CH_1, TIMER_OC_MODE_PWM0);`:设置PWM0模式,即高电平持续时间从计数器开始到达比较值时,输出为高电平,否则为低电平。
- `timer_channel_output_shadow_config(TIMER2, TIMER_CH_1, TIMER_OC_SHADOW_DISABLE);`:关闭输出通道的预装载功能。
通过以上配置,定时器2的通道1将以PWM0模式生成PWM信号,脉冲宽度为500。主输出通道开启,互补输出通道关闭,并且主输出极性和互补输出极性均为高电平有效。在空闲状态时,主输出通道和互补输出通道都为低电平。
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