i want to get the message from the uart every 5s. how can i configure timer based on that

[soundarya_h_s]

clock frequency 170MHz

This is the code i have generated using TIM2 CH1

could you please set the prescalar, period,pulse to get output every 5s  

 

 

static void MX_TIM2_Init(void)

{

 

/* USER CODE BEGIN TIM2_Init 0 */

 

/* USER CODE END TIM2_Init 0 */

 

TIM_ClockConfigTypeDef sClockSourceConfig = {0};

TIM_MasterConfigTypeDef sMasterConfig = {0};

TIM_OC_InitTypeDef sConfigOC = {0};

 

/* USER CODE BEGIN TIM2_Init 1 */

 

/* USER CODE END TIM2_Init 1 */

htim2.Instance = TIM2;

htim2.Init.Prescaler = 169;

htim2.Init.CounterMode = TIM_COUNTERMODE_UP;

htim2.Init.Period = 9999;

htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;

htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;

if (HAL_TIM_Base_Init(&htim2) != HAL_OK)

{

Error_Handler();

}

sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;

if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)

{

Error_Handler();

}

if (HAL_TIM_PWM_Init(&htim2) != HAL_OK)

{

Error_Handler();

}

sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;

sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;

if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)

{

Error_Handler();

}

sConfigOC.OCMode = TIM_OCMODE_PWM1;

sConfigOC.Pulse = 9999;

sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;

sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;

if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)

{

Error_Handler();

}

/* USER CODE BEGIN TIM2_Init 2 */

//motor1State = MC_GetSTMStateMotor1();

HAL_TIM_Base_Start(&htim2);

HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_1);

//motor1Faults = MC_GetOccurredFaultsMotor1();

motor1Faults = MC_GetCurrentFaultsMotor1();

switch (motor1Faults)

{

case 0:

HAL_UART_Transmit_DMA(&huart2, "MC_NO_ERROR", 12);

break;

case 1:

HAL_UART_Transmit_DMA(&huart2, "MC_DURATION", 12);

break;

case 2:

HAL_UART_Transmit_DMA(&huart2, "MC_OVER_VOLT", 13);

break;

case 4:

HAL_UART_Transmit_DMA(&huart2, "MC_UNDER_VOLT", 14);

break;

case 8:

HAL_UART_Transmit_DMA(&huart2, "MC_OVER_TEMP", 13);

break;

case 10:

HAL_UART_Transmit_DMA(&huart2, "MC_START_UP", 12);

break;

case 20:

HAL_UART_Transmit_DMA(&huart2, "MC_SPEED_FDBK", 14);

break;

case 40:

HAL_UART_Transmit_DMA(&huart2, "MC_BREAK_IN", 12);

break;

case 80:

HAL_UART_Transmit_DMA(&huart2, "MC_SW_ERRORS",12);

break;

 

}

 

/* USER CODE END TIM2_Init 2 */

HAL_TIM_MspPostInit(&htim2);

 

}

[Sarra.S]

Hello @soundarya_h_s, 

Check the block diagram in your product datasheet, to know which bus the TIM2 is connected to (in your case it's APB1)

Here are the formulas you're going to need : 

To calculate the TIM clock frequency: TIM Clock = APB TIM clock/ (PSC+1)

PSC = 170MHz/1MHz) - 1 = 169

To have an event every 5 seconds, you should set the ARR to (5s/1us) - 1 = 4,999,999

pulse value is not relevant since you're not using the timer in PWM mode 

You also need to configure the timer to generate an interrupt on update event 

 

 

[soundarya_h_s]

Hello @Sarra.S 
can you provide the code for interrupt on update event 
should i add callback function or what should i add in the interrupt 
is the switch case should be present in the TIM2 init itself