47 lines
1.7 KiB
C
47 lines
1.7 KiB
C
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#include "cmsis_os.h"
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#include "api-hal-tim.h"
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/* setup TIM2 CH1 and CH2 to capture rising and falling events */
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void tim_irda_rx_init(void) {
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TIM_ClockConfigTypeDef sClockSourceConfig = {0};
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TIM_MasterConfigTypeDef sMasterConfig = {0};
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TIM_IC_InitTypeDef sConfigIC = {0};
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htim2.Instance = TIM2;
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htim2.Init.Prescaler = 64 - 1;
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htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
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htim2.Init.Period = 4294967295;
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htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
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htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE;
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if(HAL_TIM_Base_Init(&htim2) != HAL_OK) {
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Error_Handler();
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}
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sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
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if(HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK) {
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Error_Handler();
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}
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if(HAL_TIM_IC_Init(&htim2) != HAL_OK) {
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Error_Handler();
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}
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sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
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sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
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if(HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK) {
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Error_Handler();
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}
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sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_FALLING;
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sConfigIC.ICSelection = TIM_ICSELECTION_DIRECTTI;
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sConfigIC.ICPrescaler = TIM_ICPSC_DIV1;
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sConfigIC.ICFilter = 0;
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if(HAL_TIM_IC_ConfigChannel(&htim2, &sConfigIC, TIM_CHANNEL_1) != HAL_OK) {
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Error_Handler();
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}
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sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
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sConfigIC.ICSelection = TIM_ICSELECTION_INDIRECTTI;
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if(HAL_TIM_IC_ConfigChannel(&htim2, &sConfigIC, TIM_CHANNEL_2) != HAL_OK) {
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Error_Handler();
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}
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HAL_NVIC_SetPriority(TIM2_IRQn, 5, 0);
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HAL_TIM_IC_Start_IT(&htim2, TIM_CHANNEL_1);
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HAL_TIM_IC_Start_IT(&htim2, TIM_CHANNEL_2);
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}
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