[英]Error using TIM1 for PWM on STM32F0
我試圖盡可能地隔離它(通過注釋掉工作的TIM3代碼以進行比較)。 我的PWM在TIM3上可以正常工作,但在TIM1上卻沒有看到任何東西。 最初,該問題是在某些TIM_OCInitStructure的注釋中指出的。 來電,但我都在那兒,但仍然看不到任何信號。 有人看到代碼中還有其他內容嗎?
void TIM_TIMER_Init(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
// RCC_APB1PeriphClockCmd(RCC_APB1ENR_TIM3EN, ENABLE); //timer 3
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); //timer 1
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period = 4799; // PER = F_timer / F_pwm - 1
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
// Initialize TIMx
// TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
// Start count on TIMx
// TIM_Cmd(TIM3, ENABLE);
TIM_Cmd(TIM1, ENABLE);
}
void TIM_PWM_Init(void)
{
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; // PWM1/PWM2 = set/clear on compare match
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
TIM_OCInitStructure.TIM_Pulse = 959; // 20% Duty Cycle on ch. 1
// TIM_OC1Init(TIM3, &TIM_OCInitStructure);
// TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);
TIM_OC1Init(TIM1, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);
/*
TIM_OCInitStructure.TIM_Pulse = 1919; // 40% Duty Cycle on ch. 2
// TIM_OC2Init(TIM3, &TIM_OCInitStructure);
// TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);
TIM_OC2Init(TIM1, &TIM_OCInitStructure);
TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);
TIM_OCInitStructure.TIM_Pulse = 2879; // 60% Duty Cycle on ch. 3
// TIM_OC3Init(TIM3, &TIM_OCInitStructure);
// TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);
TIM_OC3Init(TIM1, &TIM_OCInitStructure);
TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);
TIM_OCInitStructure.TIM_Pulse = 3839; // 80% Duty Cycle on ch. 4
// TIM_OC4Init(TIM3, &TIM_OCInitStructure);
// TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);
TIM_OC4Init(TIM1, &TIM_OCInitStructure);
TIM_OC4PreloadConfig(TIM1, TIM_OCPreload_Enable);
*/}
//"using convenience methods instead of CMSIS"
void TIM_PINS_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
// RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE); //enabling port C
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE); //enabling port A
// Alternative Functions for pins
// GPIO_PinAFConfig(GPIOC, GPIO_PinSource6, GPIO_AF_0); // PC6
// GPIO_PinAFConfig(GPIOC, GPIO_PinSource7, GPIO_AF_0); // PC7
// GPIO_PinAFConfig(GPIOC, GPIO_PinSource8, GPIO_AF_0); // PC8
// GPIO_PinAFConfig(GPIOC, GPIO_PinSource9, GPIO_AF_0); // PC9
GPIO_PinAFConfig(GPIOA, GPIO_PinSource8, GPIO_AF_2); // PA8
GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_2); // PA9
GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_2); // PA10
GPIO_PinAFConfig(GPIOA, GPIO_PinSource11, GPIO_AF_2); // PA11
// Set pins
// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
// GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
/////////////////原始問題///////////////////
有人看到這段代碼有問題嗎?
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OCInitStructure.TIM_Pulse = 959; // 20% Duty Cycle on ch. 1
TIM_OC1Init(TIM3, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);
TIM_OC1Init(TIM1, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);
問題出在
TIM_OC1Init(TIM1, &TIM_OCInitStructure);
錯誤是
assert_param()失敗:文件“ ../system/src/stm32f0-stdperiph/stm32f0xx_tim.c”,行811。在該行上查找:
if((TIMx == TIM1) || (TIMx == TIM15) || (TIMx == TIM16) || (TIMx == TIM17))
{
assert_param(IS_TIM_OUTPUTN_STATE(TIM_OCInitStruct->TIM_OutputNState)); // <- line 811
TIM_OC1Init()函數似乎適用於TIM3,但不適用於TIM1。 我已經看到該論壇中的其他人將TIM_OC1Init()用於TIM1,所以我不確定問題出在我身上。 這不是我設置ch.1的方法嗎?
奇怪的是,您使用給出的代碼在IS_TIM_OUTPUTN_STATE行上編程失敗,當然這可能是STL錯誤,但聽起來不太可能。 因此,嘗試在TIM_OutputNState_Enable上更改TIM_OutputNState_Disable。
如果捕獲斷言,則程序將陷入無限循環,並且不會執行以下設置代碼,因此不會生成pwm信號。 您也可以嘗試使用未定義的USE_FULL_ASSERT配置計時器,這是錯誤的策略,但至少不會導致斷言。
在代碼方面,您可以嘗試添加TIM_CtrlPWMOutputs(TIM1,ENABLE); 在配置並啟用計時器之后。 而且您的函數對我來說似乎很奇怪,因為您要么在啟用rcc之前調用TIM_PWM_Init()(這是錯誤的),要么在啟用計時器之后調用,這也很奇怪。
我認為解決該問題的最簡單方法是從SPL示例(例如“ STM32F0xx_StdPeriph_Lib_V1.5.0 \\ Projects \\ STM32F0xx_StdPeriph_Examples \\ TIM \\ TIM_7PWMOutputs”)中粘貼所有漂亮的代碼,然后刪除多余的代碼。
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