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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN4099 датащи(PDF) 11 Page - STMicroelectronics |
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AN4099 датащи(HTML) 11 Page - STMicroelectronics |
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11 / 39 page  AN4099 Infrared transmitter Doc ID 023110 Rev 2 11/39 Figure 8. Hardware description 2.2 IR transmitter: universal solution The infrared transmitter solution based on the STM32 enables the user to send all RC5 and SIRC instructions to all RC5 and SIRC receiver devices. The application solution uses four peripherals. ● IRTIM: (IR interface with timers) generates the IR signal using TIM16 and TIM17 – TIM17: (Timer17) provides the carrier signal with a frequency of 36 kHz for RC5 and 40 kHz for the SIRC protocol. – TIM16: (Timer16) provides the main signal to be sent (RC5 Frame or SIRC Frame). ● GPIO: (general-purpose I/O) provides the I/O to be connected to the buttons of the remote control and connected to the IR-LED. ● CLK: (clock controller) enables the clocks and provides the correct clock frequency for the timers. To generate the infrared remote control signals, TIM16 channel 1 (TIM16_OC1) and TIM17 channel 1 (TIM17_OC1) must be properly configured to generate correct waveforms. All standard IR pulse modulation modes can be obtained by programming the two timer output compare channels. The infrared function is output on the TIM_IR pin. The activation of this function is done through the GPIOx_AFRx register by enabling the related alternate function bit (PB9 directly controls the Infrared LED). The main program flow is shown in Figure 9. MS30328V2 GPIO: PB9 TIM16 envelop TIM17 Carrier R R VCC IR transmitter STM32F0xx STM32F3xx |
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