【东软载波ESF0654 PDS开发板活动】高级定时器（AD16C4T0）
支持 1路高级定时器（AD16C4T0）。AD16C4T可被视为复用在 6个通道上的 3相 PWM。PWM 互补输出的死区时间可配。另外高级定时器兼具通用定时器的所有功能。在调试模式下，高级定时器可被冻结，并禁止PWM 输出。高级定时器可与其他定时器连接，一起配合使用，以达到同步或事件串联的目的。测试1：定时中断控制LED翻转新建bsp_time0.c和bsp_time0.h 具体代码如下：#include "bsp_timer0.h"
unsignedchartimeflag;
timer_handle_th_tim;
timer_clock_config_t tim_clock;
//定时器初始化函数
void tim0_pin_init()
{
/* Initialize AD16C4T0 */
h_tim.perh = AD16C4T0;
h_tim.init.period = arr;
h_tim.init.prescaler = psc;
h_tim.init.clk_div = TIMER_CLOCK_DIV1;
h_tim.init.mode = TIMER_CNT_MODE_UP;
h_tim.init.re_cnt = 0;
ald_timer_base_init(&h_tim);
/* Initialize clock source */
tim_clock.source = TIMER_SRC_INTER;
ald_timer_config_clock_source(&h_tim, &tim_clock);
/* Enable tim0 interrupt */
ald_mcu_irq_config(AD16C4T0_BRK_UP_TRIG_COM_IRQn, 1, ENABLE);
/* Enable UPDATE interrupt */
ald_timer_interrupt_config(&h_tim, TIMER_IT_UPDATE, ENABLE);
/* Start input pwm from tim0 channel 1 */
ald_timer_base_start(&h_tim);
}
//定时器中断处理函数
void AD16C4T0_BRK_UP_TRIG_COM_Handler(void)
{
static unsigned int count;
/* Handle TIMER interrupt */
ald_timer_irq_handler(&h_tim);
count ++;
if(count == 2)
{
count = 0;
if(timeflag == 0)
timeflag =1;
elsetimeflag =0;
}
return;
}
#ifndef _BSP_TIMER0_H
#define _BSP_TIMER0_H
#include "ald_timer.h"
#include "ald_gpio.h"
#definearr 4999
#definepsc 4799
void tim0_pin_init();
#endif
mian.c 用来测试定时器操作，具体代码如下：#include "main.h"
extern unsignedchartimeflag;
int main()
{
ald_cmu_init(); // Initialize ALD
//初始化系统时钟
ald_cmu_pll1_config(CMU_PLL1_INPUT_HRC_6, CMU_PLL1_OUTPUT_48M);
ald_cmu_clock_config(CMU_CLOCK_PLL1,48000000);
led_module_init(); //LED初始化
bsp_key_init(); //按键初始化
adc_module_init(); //ADC模块初始化
tim0_pin_init(); //定时器初始化
while (1)
{
if(timeflag == 1)
{
led_operate(0, LED_ON);
led_operate(1, LED_ON);
}
else
{
led_operate(0, LED_OFF);
led_operate(1, LED_OFF);
}
}
}
测试2：利用定时器产生4路PWM新建bsp_pwm.c和bsp_pwm.h 具体代码如下：#include "bsp_pwm.h"
timer_handle_t pwm_tim;
timer_clock_config_t pwm_tim_clock;
timer_oc_init_t tim_ocinit;
void pwm_init()
{
gpio_init_t GPIO_InitStructure;
/* Initialize tim0 ch1 pin */
GPIO_InitStructure.mode = GPIO_MODE_OUTPUT;
GPIO_InitStructure.odos = GPIO_PUSH_PULL;
GPIO_InitStructure.pupd = GPIO_PUSH_UP;
GPIO_InitStructure.odrv = GPIO_OUT_DRIVE_NORMAL;
GPIO_InitStructure.flt= GPIO_FILTER_DISABLE;
GPIO_InitStructure.type = GPIO_TYPE_TTL;
GPIO_InitStructure.func = GPIO_FUNC_2;
ald_gpio_init(TIMER0_CHANNEL_PORT, TIMER0_CHANNEL1_PIN, &GPIO_InitStructure);
ald_gpio_init(TIMER0_CHANNEL_PORT, TIMER0_CHANNEL2_PIN, &GPIO_InitStructure);
ald_gpio_init(TIMER0_CHANNEL_PORT, TIMER0_CHANNEL3_PIN, &GPIO_InitStructure);
ald_gpio_init(TIMER0_CHANNEL_PORT, TIMER0_CHANNEL4_PIN, &GPIO_InitStructure);
pwm_tim.perh = AD16C4T0;
pwm_tim.init.prescaler = pwm_psc;
pwm_tim.init.period = pwm_arr;
pwm_tim.init.mode = TIMER_CNT_MODE_UP;
pwm_tim.init.clk_div = TIMER_CLOCK_DIV1;
pwm_tim.init.re_cnt = 0;
ald_timer_pwm_init(&pwm_tim);
/* Initialize clock source */
pwm_tim_clock.source = TIMER_SRC_INTER;
ald_timer_config_clock_source(&pwm_tim, &pwm_tim_clock);
/* Common configuration for all channels */
tim_ocinit.oc_mode = TIMER_OC_MODE_PWM1;
tim_ocinit.oc_polarity= TIMER_OC_POLARITY_HIGH;
tim_ocinit.oc_fast_en = DISABLE;
tim_ocinit.ocn_polarity = TIMER_OCN_POLARITY_HIGH;
tim_ocinit.ocn_idle = TIMER_OCN_IDLE_RESET;
tim_ocinit.oc_idle = TIMER_OC_IDLE_RESET;
/* Set the pulse value for channel 1 */
tim_ocinit.pulse = PULSE1_VALUE;
ald_timer_oc_config_channel(&pwm_tim, &tim_ocinit, TIMER_CHANNEL_1);
/* Set the pulse value for channel 2 */
tim_ocinit.pulse = PULSE2_VALUE;
ald_timer_oc_config_channel(&pwm_tim, &tim_ocinit, TIMER_CHANNEL_2);
/* Set the pulse value for channel 3 */
tim_ocinit.pulse = PULSE3_VALUE;
ald_timer_oc_config_channel(&pwm_tim, &tim_ocinit, TIMER_CHANNEL_3);
/* Set the pulse value for channel 4 */
tim_ocinit.pulse = PULSE4_VALUE;
ald_timer_oc_config_channel(&pwm_tim, &tim_ocinit, TIMER_CHANNEL_4);
/* Start input pwm from tim0 channel 1 */
ald_timer_oc_start(&pwm_tim, TIMER_CHANNEL_1);
/* Start input pwm from tim0 channel 2 */
ald_timer_oc_start(&pwm_tim, TIMER_CHANNEL_2);
/* Start input pwm from tim0 channel 3 */
ald_timer_oc_start(&pwm_tim, TIMER_CHANNEL_3);
/* Start input pwm from tim0 channel 4 */
ald_timer_oc_start(&pwm_tim, TIMER_CHANNEL_4);
}
#ifndef __BSP_PWM_H__
#define __BSP_PWM_H__
#include "ald_timer.h"
#include "ald_gpio.h"
#definepwm_psc 0
#definepwm_arr (uint32_t)(700 - 1)/* Period Value*/
#definePULSE1_VALUE (uint32_t)(pwm_arr/2) /* Capture Compare 1 Value*/
#definePULSE2_VALUE (uint32_t)(pwm_arr*37.5/100) /* Capture Compare 2 Value*/
#definePULSE3_VALUE (uint32_t)(pwm_arr/4) /* Capture Compare 3 Value*/
#definePULSE4_VALUE (uint32_t)(pwm_arr*12.5/100) /* Capture Compare 4 Value*/
#define TIMER0_CHANNEL_PORT GPIOA
#define TIMER0_CHANNEL1_PIN GPIO_PIN_8
#define TIMER0_CHANNEL2_PIN GPIO_PIN_9
#define TIMER0_CHANNEL3_PIN GPIO_PIN_10
#define TIMER0_CHANNEL4_PIN GPIO_PIN_11
void pwm_init(void);
#endif
mian.c 用来测试定时器0产生4路pwm，引脚分别对应PA8、 PA9、PA10、 PA11具体代码如下：#include "main.h"
int main()
{
//初始化ALD
ald_cmu_init();
//初始化系统时钟
ald_cmu_pll1_config(CMU_PLL1_INPUT_HRC_6, CMU_PLL1_OUTPUT_48M);
ald_cmu_clock_config(CMU_CLOCK_PLL1,48000000);
led_module_init(); //LED初始化
bsp_key_init(); //按键初始化
adc_module_init(); //ADC模块初始化
//tim0_pin_init(); //定时器初始化
pwm_init(); //pwm初始化
while (1)
{
}
}
测试结果：
连接对应引脚
输出的pwm波形
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