S3C2440定时器中断程序详解及源码分析

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s3c2440
timer
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资源摘要信息:"s3c2440定时器中断程序，源码，包括每个寄存器的作用解释" 知识点: 1. s3c2440定时器中断程序介绍 s3c2440是三星公司生产的一款基于ARM920T内核的32位RISC处理器，广泛应用于嵌入式系统。定时器中断是其重要的功能之一，它可以在预设的时间到达时产生中断信号，从而触发中断处理程序的执行。在本资源中，我们将会看到s3c2440定时器中断程序的源码，包括每个寄存器的作用解释。 2. s3c2440定时器中断程序源码解析 在资源压缩包中的timer.c文件中，我们可以看到s3c2440定时器中断程序的源码。程序中包含了定时器的初始化、启动、停止以及中断服务函数等内容。 3. s3c2440定时器寄存器解析 s3c2440定时器模块包括多个寄存器，每个寄存器都有其特定的作用。在timer.c文件中，我们可以看到对这些寄存器的具体操作和解释。例如，TCON寄存器用于控制定时器的启动和停止，TCNTB寄存器用于设置定时器的计数值，TCNTO寄存器用于保存定时器溢出的时间等。 4. s3c2440定时器中断的使用 在main.c文件中，我们可以看到如何使用定时器中断。首先，需要对定时器进行初始化，然后在需要的时候启动定时器。当定时器到达预设的时间后，会产生中断信号，此时会调用中断服务函数进行处理。 5. s3c2440定时器中断程序的应用 在led.c、uart.c、test.c等文件中，我们可以看到s3c2440定时器中断程序的具体应用。例如，在led.c文件中，定时器中断用于控制LED灯的闪烁；在uart.c文件中，定时器中断用于实现串口通信；在test.c文件中，定时器中断用于测试程序的功能等。 6. s3c2440定时器中断程序的编译和运行 在main.dis文件中，我们可以看到s3c2440定时器中断程序的反汇编结果，这可以帮助我们理解程序的执行流程。而main.bin文件则包含了可执行的二进制代码，我们可以将其烧写到s3c2440处理器中进行运行。 总结： 以上就是s3c2440定时器中断程序的主要知识点。通过学习这些知识点，我们可以更好地理解和使用s3c2440的定时器中断功能，从而提高我们对嵌入式系统的开发能力。

dw_apb_timer_of.rar_V2 _apb timer_dw_apb_dw_timer_pc3x2

2022-09-14 上传
7. **驱动程序的编写**：`dw_apb_timer_of.c`文件包含了实现上述功能的C语言代码，包括注册定时器设备、初始化硬件、设置定时中断等操作。理解驱动程序的代码可以帮助开发者调试、优化或移植到其他系统。 综上所述...

ebt_mark_t.rar_V2 _linux timer_list_timer_list

2022-09-24 上传
文件"ebt_mark_t.c"可能包含了这个新增定时器的实现代码，而"ax25_ds_timer.c"可能涉及了与AX.25（ Amateur Radio Networking Protocol）协议相关的定时器操作，因为AX.25常用于无线电通信，其中可能也使用了类似的...

优化下面代码：switch (timer_priv->timeridx) { case 1: tempreg = readl(timer_priv->base + TIMER_CCR_CONTROL_C1); tempreg |= CCR_RST_ENABLE; writel(tempreg, timer_priv->base + TIMER_CCR_CONTROL_C1); tempreg = readl(timer_priv->base + TIMER_IER_C1); tempreg &= ~(IER_EVNT_ENABLE | IER_ITRV_ENABLE | IER_M1_ENABLE | IER_M2_ENABLE | IER_M3_ENABLE); writel(tempreg, timer_priv->base + TIMER_IER_C1); if (timer_priv->idx == 0) { timer_priv->irq = C_TTC0_TIMER0_IRQn; request_irq(C_TTC0_TIMER0_IRQn, itcs_timer_irq, "itcs_timer_irq01", timer_priv); } else { timer_priv->irq = C_TTC1_TIMER0_IRQn; request_irq(C_TTC1_TIMER0_IRQn, itcs_timer_irq, "itcs_timer_irq11", timer_priv); } break; case 2: tempreg = readl(timer_priv->base + TIMER_CCR_CONTROL_C2); tempreg |= CCR_RST_ENABLE; writel(tempreg, timer_priv->base + TIMER_CCR_CONTROL_C2); tempreg = readl(timer_priv->base + TIMER_IER_C2); tempreg &= ~(IER_EVNT_ENABLE | IER_ITRV_ENABLE | IER_M1_ENABLE | IER_M2_ENABLE | IER_M3_ENABLE); writel(tempreg, timer_priv->base + TIMER_IER_C2); if (timer_priv->idx == 0) { timer_priv->irq = C_TTC0_TIMER1_IRQn; request_irq(C_TTC0_TIMER1_IRQn, itcs_timer_irq, "itcs_timer_irq02", timer_priv); } else { timer_priv->irq = C_TTC1_TIMER1_IRQn; request_irq(C_TTC1_TIMER1_IRQn, itcs_timer_irq, "itcs_timer_irq12", timer_priv); } break;

2023-02-18 上传
试着把代码改写成：tempreg = readl(timer_priv->base + TIMER_CCR_CONTROL_C1); tempreg |= CCR_RST_ENABLE; writel(tempreg, timer_priv->base + TIMER_CCR_CONTROL_C1); tempreg = readl(timer_priv->base + ...

void pwm_capture_timer_config(void) { /* TIMER2 configuration: input capture mode ------------------- the external signal is connected to TIMER2 CH0 pin (PB4) the rising edge is used as active edge the TIMER2 CH0CV is used to compute the frequency value ------------------------------------------------------------ */ timer_ic_parameter_struct timer_icinitpara; timer_parameter_struct timer_initpara; rcu_periph_clock_enable(RCU_TIMER0); timer_deinit(TIMER0); /* TIMER1 configuration */ timer_initpara.prescaler = 119; timer_initpara.alignedmode = TIMER_COUNTER_EDGE; timer_initpara.counterdirection = TIMER_COUNTER_UP; timer_initpara.period = 65535; timer_initpara.clockdivision = TIMER_CKDIV_DIV1; timer_initpara.repetitioncounter = 0; timer_init(TIMER0,&timer_initpara); /* TIMER1 configuration */ /* TIMER1 CH2 input capture configuration */ timer_icinitpara.icpolarity = TIMER_IC_POLARITY_FALLING; timer_icinitpara.icselection = TIMER_IC_SELECTION_DIRECTTI; timer_icinitpara.icprescaler = TIMER_IC_PSC_DIV1; timer_icinitpara.icfilter = 0x0; timer_input_capture_config(TIMER0,TIMER_CH_1,&timer_icinitpara); nvic_irq_enable(TIMER0_Channel_IRQn, 1, 1); timer_primary_output_config(TIMER0, ENABLE); /* auto-reload preload enable */ timer_auto_reload_shadow_enable(TIMER0); /* clear channel 0 interrupt bit */ timer_interrupt_flag_clear(TIMER0,TIMER_INT_FLAG_CH1); /* channel 0 interrupt enable */ timer_interrupt_enable(TIMER0,TIMER_INT_CH1); /* TIMER1 counter enable */ timer_enable(TIMER0); }

2023-06-06 上传
timer_input_capture_config(TIMER0,TIMER_CH_1,&timer_icinitpara); ``` 5. 配置TIMER0的中断 ``` nvic_irq_enable(TIMER0_Channel_IRQn, 1, 1); timer_primary_output_config(TIMER0, ENABLE); /* auto-reload ...

重写下面代码;timer_handle_t itcs_timer_init(timer_handle_t handle, timer_event_cb_t cb_event) { timer_priv_t *timer_priv = handle; if (timer_priv->idx < 0 || timer_priv->idx >= CONFIG_TIMER_NUM) { return NULL; } set_clock_type("cpu-pclk"); // printf("enter timer init fun in driver\n"); uint32_t tempreg = 0; switch (timer_priv->idx) { case 0: timer_priv->base = ITCS_TIMER0_BASE; break; case 1: timer_priv->base = ITCS_TIMER1_BASE; break; default: break; } // printf("unit %d ,timeridx %d, base addr // %08x\n",timer_priv->idx,timer_priv->timeridx,timer_priv->base); switch (timer_priv->timeridx) { case 1: tempreg = readl(timer_priv->base + TIMER_CCR_CONTROL_C1); tempreg |= CCR_RST_ENABLE; writel(tempreg, timer_priv->base + TIMER_CCR_CONTROL_C1); tempreg = readl(timer_priv->base + TIMER_IER_C1); tempreg &= ~(IER_EVNT_ENABLE | IER_ITRV_ENABLE | IER_M1_ENABLE | IER_M2_ENABLE | IER_M3_ENABLE); writel(tempreg, timer_priv->base + TIMER_IER_C1); if (timer_priv->idx == 0) { timer_priv->irq = TTC0_TIMER1_IRQn; request_irq(TTC0_TIMER1_IRQn, itcs_timer_irq, "itcs_timer_irq01", timer_priv); } else { timer_priv->irq = TTC1_TIMER1_IRQn; request_irq(TTC1_TIMER1_IRQn, itcs_timer_irq, "itcs_timer_irq11", timer_priv); } break; case 2: tempreg = readl(timer_priv->base + TIMER_CCR_CONTROL_C2); tempreg |= CCR_RST_ENABLE; writel(tempreg, timer_priv->base + TIMER_CCR_CONTROL_C2); tempreg = readl(timer_priv->base + TIMER_IER_C2); tempreg &= ~(IER_EVNT_ENABLE | IER_ITRV_ENABLE | IER_M1_ENABLE | IER_M2_ENABLE | IER_M3_ENABLE); writel(tempreg, timer_priv->base + TIMER_IER_C2); if (timer_priv->idx == 0) { timer_priv->irq = TTC0_TIMER2_IRQn; request_irq(TTC0_TIMER2_IRQn, itcs_timer_irq, "itcs_timer_irq02", timer_priv); } else { timer_priv->irq = TTC1_TIMER2_IRQn; request_irq(TTC1_TIMER2_IRQn, itcs_timer_irq, "itcs_timer_irq12", timer_priv); } break; case 3: tempreg = readl(timer_priv->base + TIMER_CCR_CONTROL_C3); tempreg |= CCR_RST_ENABLE; writel(tempreg, timer_priv->base + TIMER_CCR_CONTROL_C3); tempreg = readl(timer_priv->base + TIMER_IER_C3); tempreg &= ~(IER_EVNT_ENABLE | IER_ITRV_ENABLE | IER_M1_ENABLE | IER_M2_ENABLE | IER_M3_ENABLE); writel(tempreg, timer_priv->base + TIMER_IER_C3); if (timer_priv->idx == 0) { timer_priv->irq = TTC0_TIMER3_IRQn; request_irq(TTC0_TIMER3_IRQn, itcs_timer_irq, "itcs_timer_irq03", timer_priv); // printf("unit timer1 ret=%08x , request irq3 success!\n",ret); } else { timer_priv->irq = TTC1_TIMER3_IRQn; request_irq(TTC1_TIMER3_IRQn, itcs_timer_irq, "itcs_timer_irq13", timer_priv); // printf("unit timer1 ret=%08x , request irq3 success!\n",ret); } break; default: return NULL; } timer_priv->cb_event = cb_event; // printf("init status irq id num:%d\n",timer_priv->irq); // printf("INIT TIMER %d Timer Count No %d SUCCESS\n", timer_priv->idx, // timer_priv->timeridx); return (timer_handle_t)timer_priv; }

2023-02-17 上传
```c timer_handle_t itcs_timer_init(timer_handle_t handle, timer_event_cb_t cb_event) { timer_priv_t *timer_priv = (timer_priv_t *)handle; if (timer_priv->idx || timer_priv->idx >= CONFIG_TIMER_...

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

2023-07-15 上传
- `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, ...

重写下面代码：int set_freq_div(timer_handle_t handle, uint32_t divnum) { uint32_t reg; timer_priv_t *timer_priv = handle; switch (timer_priv->timeridx) { case 1: reg = readl(timer_priv->base + TIMER_CCR_CONTROL_C1); reg = (reg & 0xffffffe1) | (divnum << 1); writel(reg, timer_priv->base + TIMER_CCR_CONTROL_C1); break; case 2: reg = readl(timer_priv->base + TIMER_CCR_CONTROL_C2); reg = (reg & 0xffffffe1) | (divnum << 1); writel(reg, timer_priv->base + TIMER_CCR_CONTROL_C2); break; case 3: reg = readl(timer_priv->base + TIMER_CCR_CONTROL_C3); reg = (reg & 0xffffffe1) | (divnum << 1); writel(reg, timer_priv->base + TIMER_CCR_CONTROL_C3); break; default: return -1; } // printf("SET DIV FREQ SUCCESS!\n"); return 0; }

2023-02-17 上传
writel(reg, timer_priv->base + TIMER_CCR_CONTROL_C1); break; case 2: reg = readl(timer_priv->base + TIMER_CCR_CONTROL_C2); reg = (reg & 0xfffff800) 0x000007ff; reg |= divnum; writel(reg, timer_priv->...

修改语法 typedef void *TIMER_ID; typedef void (* TAL_TIMER_CB)(void); TIMER_ID zcd_timer; void zcd_callback_func(void) {} unsigned char zero_crossing_detect_unit_sw_timer_create(TAL_TIMER_CB func, void *arg, TIMER_ID *timer_id) { //函数关联的是开启定时器，形参是时间到了执行硬件动作，并且查看是否开启硬件,初始化是开启定时器，并且返回OK if(zero_crossing_detect_unit.zcb_sw_timer_create(zcb_timer_callback, NULL, &zcd_timer) != OPRT_OK) { rt = OPRT_COM_ERROR; } return rt; }

2023-03-23 上传
TIMER_ID *timer_id) { // 初始化定时器并返回OK zcd_timer = zero_crossing_detect_unit.zcb_sw_timer_create(func, arg, timer_id); if (zcd_timer != NULL) { return OK; } else { return ERROR; } } //...

#include "driverlib.h" #define TIMER_PERIOD 8192 void Timer_A0_PWM_Init(void) { Timer_A_outputPWMParam htim = {0}; //P1.2复用输出 GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P1, GPIO_PIN2); //时钟源选为SMCLK = 1048576 HZ htim.clockSource = TIMER_A_CLOCKSOURCE_SMCLK; //分频系数设为32 32768HZ htim.clockSourceDivider = TIMER_A_CLOCKSOURCE_DIVIDER_32; //装载值设为8192 - 1 ，周期为0.25s htim.timerPeriod = TIMER_PERIOD - 1; //P1.2 对应 TA0.1 故设为TIMER_A_CAPTURECOMPARE_REGISTER_1 定时器为0 htim.compareRegister = TIMER_A_CAPTURECOMPARE_REGISTER_1; //选择复位置位模式 htim.compareOutputMode = TIMER_A_OUTPUTMODE_RESET_SET; //设置占空比，为5% htim.dutyCycle = TIMER_PERIOD / 20 ; //P1.2 对应 TA0.1 为TIMER_A0_BASE Timer_A_outputPWM(TIMER_A0_BASE, &htim); } void Timer_A1_PWM_Init(void) { Timer_A_outputPWMParam htim = {0}; //P1.3复用输出 GPIO_setAsPeripheralModuleFunctionOutputPin(GPIO_PORT_P1, GPIO_PIN3); //时钟源选为SMCLK = 1048576 HZ htim.clockSource = TIMER_A_CLOCKSOURCE_SMCLK; //分频系数设为32 32768HZ htim.clockSourceDivider = TIMER_A_CLOCKSOURCE_DIVIDER_32; //装载值设为8192 - 1 ，周期为0.25s htim.timerPeriod = TIMER_PERIOD - 1; //P1.3 对应 TA1.1 故设为TIMER_A_CAPTURECOMPARE_REGISTER_1 定时器为1 htim.compareRegister = TIMER_A_CAPTURECOMPARE_REGISTER_1; //选择复位置位模式 htim.compareOutputMode = TIMER_A_OUTPUTMODE_RESET_SET; //设置占空比，为10% htim.dutyCycle = TIMER_PERIOD / 10 ; //P1.3 对应 TA1.1 为TIMER_A1_BASE Timer_A_outputPWM(TIMER_A1_BASE, &htim); }

2023-07-16 上传
这段代码在前面的基础上又新增了一个函数 Timer_A1_PWM_Init，用于初始化 Timer_A1 的 PWM 功能。 与 Timer_A0_PWM_Init 函数相似，Timer_A1_PWM_Init 函数也首先引入了 driverlib 库，并定义了常量 TIMER_PERIOD。...

重写下方代码：int set_freq_div(timer_handle_t handle, uint32_t divnum) { uint32_t reg; timer_priv_t *timer_priv = handle; switch (timer_priv->timeridx) { case 1: reg = readl(timer_priv->base + TIMER_CCR_CONTROL_C1); reg = (reg & 0xffffffe1) | (divnum << 1); writel(reg, timer_priv->base + TIMER_CCR_CONTROL_C1); break; case 2: reg = readl(timer_priv->base + TIMER_CCR_CONTROL_C2); reg = (reg & 0xffffffe1) | (divnum << 1); writel(reg, timer_priv->base + TIMER_CCR_CONTROL_C2); break; case 3: reg = readl(timer_priv->base + TIMER_CCR_CONTROL_C3); reg = (reg & 0xffffffe1) | (divnum << 1); writel(reg, timer_priv->base + TIMER_CCR_CONTROL_C3); break; default: return -1; } // printf("SET DIV FREQ SUCCESS!\n"); return 0; }

2023-02-17 上传
timer_priv_t *timer_priv = (timer_priv_t *) handle; uint32_t reg = readl(timer_priv->base + TIMER_CCR_CONTROL_C1); if (timer_priv->timeridx == 1) { reg = (reg & ~(TIMER_CCR_CONTROL_C1_DIV_MASK))...
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