Hello All, I am using STM32f105rbt, issue is comming when i am using Ethernet and PWM using TIM1 simualteniously. individually both are working. please any one can help me?

Shail · ‎2022-09-04

If i am generating PWM pulse by uing TIM1 (PA8) my ethernnet not worming?

for ethernet config i m using CMSIS lib provided by ST

Pwm configuration is s follows

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOA, &GPIO_InitStructure);

TIM_TimeBaseStructure.TIM_Prescaler = (uint16_t)(Prescaler);

TIM_TimeBaseStructure.TIM_Period = (uint16_t)(Period);

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

TIM_TimeBaseStructure.TIM_ClockDivision = 0; // Not used

TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; // Not used

TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;

TIM_OCInitStructure.TIM_Pulse = (uint16_t)(duty_cycle); // 50% /2

TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;

//TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

//TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low;

//TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;

//TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;

TIM_OC1Init(TIM1, &TIM_OCInitStructure);

TIM_Cmd(TIM1, ENABLE);

TIM_CtrlPWMOutputs(TIM1, ENABLE);

Piranha · ‎2022-09-05

STM32F105xx doesn't have Ethernet peripheral:

There is no such thing as "CMSIS lib". Your code looks to be using the older SPL library.