GD32F150 APB2 上的定时器不工作？

只看该作者 · 2018-5-29 09:40

我使用 GD32F150G8U6 器件，单板基本工作正常，包括 GPIO 点灯， USB FS， UART 等。在使用 Timer 时遇到连接在 APB2 上的定时器无法工作。

我初始化定时器时钟

RCC_AHBPeriphClock_Enable(RCC_AHBPERIPH_GPIOA | RCC_AHBPERIPH_GPIOB , ENABLE);
RCC_APB1PeriphClock_Enable(RCC_APB1PERIPH_TIMER2 | RCC_APB1PERIPH_TIMER3  | RCC_APB1PERIPH_TIMER6  | RCC_APB1PERIPH_TIMER14, ENABLE);
RCC_APB2PeriphClock_Enable(RCC_APB2PERIPH_TIMER15 | RCC_APB2PERIPH_TIMER16 | RCC_APB2PERIPH_TIMER17, ENABLE);

设置 TIMER3

GPIO_InitStructure.GPIO_Pin                         = GPIO_PIN_6;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA, GPIO_PINSOURCE6, GPIO_AF_1);

TIMER_DeInit(TIMER3);
TIMER_TimeBaseStructure.TIMER_Prescaler    = 719;
TIMER_TimeBaseStructure.TIMER_CounterMode= TIMER_COUNTER_UP;
TIMER_TimeBaseStructure.TIMER_Period       = 50;
TIMER_TimeBaseStructure.TIMER_ClockDivision = TIMER_CDIV_DIV1;
TIMER_BaseInit(TIMER3, &TIMER_TimeBaseStructure);

TIMER_ICInitStructure.TIMER_CH                = TIMER_CH_1;
TIMER_OCInitStructure.TIMER_OCMode       = TIMER_OC_MODE_PWM1;
TIMER_OCInitStructure.TIMER_OCPolarity    = TIMER_OC_POLARITY_HIGH;
TIMER_OCInitStructure.TIMER_OutputState    = TIMER_OUTPUT_STATE_ENABLE;
TIMER_OCInitStructure.TIMER_Pulse             = 25;
TIMER_OC1_Init(TIMER3, &TIMER_OCInitStructure);

TIMER_OC1_Preload(TIMER3, TIMER_OC_PRELOAD_DISABLE);
TIMER_CARLPreloadConfig(TIMER3, ENABLE);

TIMER_Enable(TIMER3, ENABLE);

用示波器在 PA6 上可观察到方波信号。但是对于 Timer17, 基本上是同样的设置

GPIO_InitStructure.GPIO_Pin                            = GPIO_PIN_7;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA, GPIO_PINSOURCE7, GPIO_AF_5);

TIMER_DeInit(TIMER17);
TIMER_TimeBaseStructure.TIMER_Prescaler       = 719;
TIMER_TimeBaseStructure.TIMER_CounterMode = TIMER_COUNTER_UP;
TIMER_TimeBaseStructure.TIMER_Period          = 50;
TIMER_TimeBaseStructure.TIMER_ClockDivision = TIMER_CDIV_DIV1;
TIMER_BaseInit(TIMER17, &TIMER_TimeBaseStructure);

TIMER_ICInitStructure.TIMER_CH             = TIMER_CH_1;
TIMER_OCInitStructure.TIMER_OCMode    = TIMER_OC_MODE_PWM1;
TIMER_OCInitStructure.TIMER_OCPolarity  = TIMER_OC_POLARITY_HIGH;
TIMER_OCInitStructure.TIMER_OutputState= TIMER_OUTPUT_STATE_ENABLE;
TIMER_OCInitStructure.TIMER_Pulse       = 25;
TIMER_OC1_Init(TIMER17, &TIMER_OCInitStructure);

TIMER_OC1_Preload(TIMER17, TIMER_OC_PRELOAD_DISABLE);
TIMER_CARLPreloadConfig(TIMER17, ENABLE);
TIMER_Enable(TIMER17, ENABLE);

在 PA7 上看不到任何信号。变换其它的I/O 引脚，试过 TIMER （15，16， 17）情况都相同，而这些定时器都是挂在 APB2上，它们需要进行特殊的设置吗？

只看该作者 · 2018-5-31 11:22

搞个完整测试代码出来才可以帮你查

只看该作者 · 2018-6-1 11:30

#include "gd32f1x0_gpio.h"
#include "gd32f1x0_syscfg.h"
#include "gd32f1x0_rcc.h"
#include "gd32f1x0_misc.h"
#include "gd32f1x0_timer.h"

//  此文件可以与 startup.s 组成一个项目。使用 GD32标准外设库 2.0
// 把下面的 #if 0 改为 1 则使用 TIMER 3, 在 PA6 上可示波器观察输出
// 再改回来使用 TIMER 16, 没有输出，只有连续的高电平。

#if 0
#define TEST_TIMER             TIMER3
#define TEST_PIN_AF_CONFIG    GPIO_AF_1
#else
#define TEST_TIMER             TIMER16
#define TEST_PIN_AF_CONFIG    GPIO_AF_5
#endif

int main(void) {
GPIO_InitPara    GPIO_InitStructure;
TIMER_BaseInitPara  TIMER_TimeBaseStructure;
TIMER_OCInitPara TIMER_OCInitStructure;

RCC_AHBPeriphClock_Enable(RCC_AHBPERIPH_GPIOA, ENABLE);
RCC_APB1PeriphClock_Enable(RCC_APB1PERIPH_TIMER3, ENABLE);
RCC_APB2PeriphClock_Enable(RCC_APB2PERIPH_TIMER16, ENABLE);

GPIO_InitStructure.GPIO_Pin                = GPIO_PIN_6;
GPIO_InitStructure.GPIO_Mode             = GPIO_MODE_AF;
GPIO_InitStructure.GPIO_Speed             = GPIO_SPEED_50MHZ;
GPIO_InitStructure.GPIO_OType             = GPIO_OTYPE_PP;
GPIO_InitStructure.GPIO_PuPd             = GPIO_PUPD_NOPULL;

GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA,  GPIO_PINSOURCE6, TEST_PIN_AF_CONFIG);

TIMER_DeInit(TEST_TIMER);
TIMER_TimeBaseStructure.TIMER_Prescaler    = 0;
TIMER_TimeBaseStructure.TIMER_CounterMode = TIMER_COUNTER_UP;
TIMER_TimeBaseStructure.TIMER_Period       = 36000;
TIMER_TimeBaseStructure.TIMER_ClockDivision = TIMER_CDIV_DIV1;
TIMER_TimeBaseStructure.TIMER_RepetitionCounter = 0;
TIMER_BaseInit(TEST_TIMER,  &TIMER_TimeBaseStructure);

TIMER_OCStructInit(&TIMER_OCInitStructure);
TIMER_OCInitStructure.TIMER_OCMode       = TIMER_OC_MODE_TOGGLE;
TIMER_OCInitStructure.TIMER_OCPolarity    = TIMER_OC_POLARITY_HIGH;
TIMER_OCInitStructure.TIMER_OutputState    = TIMER_OUTPUT_STATE_ENABLE;
TIMER_OCInitStructure.TIMER_Pulse          = 18000;
TIMER_OC1_Init(TEST_TIMER, &TIMER_OCInitStructure);

TIMER_OC1_Preload(TEST_TIMER,    TIMER_OC_PRELOAD_DISABLE);
TIMER_CARLPreloadConfig(TEST_TIMER, ENABLE);

TIMER_Enable(TEST_TIMER, ENABLE);

while (1) {
}
}