CN213399259U - STM 32-based PWM output system - Google Patents
STM 32-based PWM output system Download PDFInfo
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- CN213399259U CN213399259U CN202022605479.5U CN202022605479U CN213399259U CN 213399259 U CN213399259 U CN 213399259U CN 202022605479 U CN202022605479 U CN 202022605479U CN 213399259 U CN213399259 U CN 213399259U
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Abstract
The utility model discloses a PWM output system based on STM32, including STM32 singlechip, including data serial ports, power source, timer, debugging interface in the STM32 singlechip, power source connects gradually steady voltage chip a, steady voltage chip b, and steady voltage chip b connects voltage input unit, and steady voltage chip a, steady voltage chip b connect the level conversion chip respectively, and the timer connects the level conversion chip, and the level conversion chip connects DB62 interface, and data serial ports connects DB9 interface; the frequency and the duty ratio of the PWM can be controlled through the serial port, and the frequency and the duty ratio can be changed simultaneously during operation, so that the output capacity of the PWM is improved.
Description
Technical Field
The utility model belongs to the technical field of the microcontroller structure, concretely relates to PWM output system based on STM 32.
Background
Pwm (pulse Width modulation) is a very effective technique for controlling an analog circuit by using an analog output of a microprocessor, and is widely used in many fields such as measurement, temperature control, power control and conversion.
The PWM output signals controlled by the existing microcontroller structure mostly have the defects of low output frequency, few output channels and unchangeable frequency.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a PWM output system based on STM32 can improve PWM's output capacity.
The utility model discloses the technical scheme who adopts is, a PWM output system based on STM32, including STM32 singlechip, including data serial ports in the STM32 singlechip, power source, timer, debugging interface, power source connects gradually voltage stabilizing chip an, voltage stabilizing chip b, and voltage stabilizing chip b connects the voltage input unit, and voltage stabilizing chip an, voltage stabilizing chip b connect the level conversion chip respectively, and the level conversion chip is connected to the timer, and DB62 interface, data serial ports connection DB9 interface are connected to the level conversion chip.
The utility model discloses a characteristics still lie in:
the model of the voltage stabilization chip a is LM1117 IMP-3.3.
And the model of the voltage stabilizing chip b is TPS5430 DDAR.
The debugging interface is connected with a debugger.
The model of the level conversion chip is TXS0108 ERGYR.
The input voltage of the voltage input unit is 12V.
The utility model has the advantages that:
the utility model relates to a PWM output system based on STM32 can control PWM's frequency and duty cycle through the serial ports, can change frequency and duty cycle simultaneously during the operation, improves PWM's output capacity.
Drawings
Fig. 1 is a schematic structural diagram of a PWM output system based on STM32 according to the present invention;
fig. 2 is the utility model discloses a PWM output system working principle diagram based on STM 32.
In the figure, 1, an STM32 single chip microcomputer, 2, a voltage stabilizing chip a, 3, a voltage stabilizing chip b, 4, a level conversion chip, 5, a DB62 interface, 6, a DB9 interface and 7, a debugger.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model relates to a PWM output system based on STM32, as shown in FIG. 1, including STM32 singlechip 1, including data serial ports in the STM32 singlechip 1, power source, the timer, the debugging interface, power source connects gradually voltage stabilization chip a2, voltage stabilization chip b3, voltage stabilization chip b3 connects the voltage input unit, voltage stabilization chip a2, voltage stabilization chip b3 connects level conversion chip 4 respectively, level conversion chip 4 is connected to the timer, DB62 interface 5 is connected to level conversion chip 4, data serial ports connection DB9 interface 6.
The voltage stabilizing chip a2 is LM1117 IMP-3.3.
The voltage stabilization chip b3 is model TPS5430 DDAR.
The debug interface is connected to a debugger 7.
The model of the level conversion chip 4 is TXS0108 ERGYR.
The input voltage of the voltage input unit is 12V.
The utility model relates to a role of each part among the PWM output system based on STM32 does:
The voltage regulation chip b3 adopts the voltage regulation chip TPS5430DDAR to convert the input 12.0V into 5.0V, and the 5.0V is used for supplying power to the level conversion chip 4 and simultaneously supplying the voltage to the voltage regulation chip a 2.
The voltage stabilizing chip a2 adopts a voltage stabilizing chip LM1117IMP-3.3 to convert 5.0v of voltage into 3.3v of voltage for supplying power to the level conversion chip 4 and the STM32 singlechip 1.
The level conversion chip 4 adopts TXS0108ERGYR to realize level conversion and is used for converting 3.3v voltage into 5.0v, and the chip adopts 3.3v and 5.0v for power supply.
The DB62 interface 5 is used for connecting with a controlled device and sending the generated PWM waveform to the controlled device.
The DB9 interface 6 is used to interface with a control device and receive serial data frames generated by the control device.
The utility model relates to a PWM output system's theory of operation based on STM32 does:
as shown in fig. 2, after the system is powered on, the system receives a serial data frame sent by the control device through the DB9 interface 6, where the content of the data frame includes frequency and duty ratio information of the 32-way PWM waveform; after receiving the data, the system analyzes the data frame to obtain 32 frequency and duty ratio data; the timer is configured according to the obtained data to generate 32 paths of PWM pulses (the 32 paths of PWM pulses are 3.3v), the 32 paths of PWM pulses are converted into 5v through the level conversion chip 4, and the 32 paths of PWM pulses are sent to the controlled device through the DB62 interface 5.
Through the mode, the utility model relates to a PWM output system based on STM32 has multichannel PWM output ability, can reach 32 way at most, and every way level is 5.0 v; the high-frequency PWM output can be carried out, and the PWM frequency and the duty ratio generated by the system can be changed at any time through a serial port during operation.
Claims (6)
1. The utility model provides a PWM output system based on STM32, a serial communication port, its characterized in that, includes STM32 singlechip (1), including data serial ports, power source, timer, debugging interface in STM32 singlechip (1), power source connects gradually voltage stabilization chip a (2), voltage stabilization chip b (3) connect the voltage input unit, level conversion chip (4) are connected respectively in voltage stabilization chip a (2), voltage stabilization chip b (3), level conversion chip (4) are connected to the timer, DB62 interface (5) is connected in level conversion chip (4), data serial ports connection DB9 interface (6).
2. The STM 32-based PWM output system according to claim 1, wherein the voltage regulation chip a (2) is LM1117 IMP-3.3.
3. The STM 32-based PWM output system according to claim 1, wherein the voltage regulation chip b (3) is TPS5430 DDAR.
4. The STM 32-based PWM output system according to claim 1, wherein the debug interface is connected with a debugger (7).
5. The STM 32-based PWM output system according to claim 1, wherein the model of the level conversion chip (4) is TXS0108 ERGYR.
6. An STM 32-based PWM output system according to claim 1, wherein the voltage input unit input voltage is 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022605479.5U CN213399259U (en) | 2020-11-11 | 2020-11-11 | STM 32-based PWM output system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022605479.5U CN213399259U (en) | 2020-11-11 | 2020-11-11 | STM 32-based PWM output system |
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| CN213399259U true CN213399259U (en) | 2021-06-08 |
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| CN202022605479.5U Active CN213399259U (en) | 2020-11-11 | 2020-11-11 | STM 32-based PWM output system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113447616A (en) * | 2021-06-22 | 2021-09-28 | 成都归谷环境科技有限责任公司 | PWM output value calculation method of CO2 sensor |
| CN114050810A (en) * | 2022-01-13 | 2022-02-15 | 武汉通力路达科技有限公司 | PWM waveform generation method, device, embedded equipment and storage medium |
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2020
- 2020-11-11 CN CN202022605479.5U patent/CN213399259U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113447616A (en) * | 2021-06-22 | 2021-09-28 | 成都归谷环境科技有限责任公司 | PWM output value calculation method of CO2 sensor |
| CN113447616B (en) * | 2021-06-22 | 2022-09-02 | 成都归谷环境科技有限责任公司 | PWM output value calculation method of CO2 sensor |
| CN114050810A (en) * | 2022-01-13 | 2022-02-15 | 武汉通力路达科技有限公司 | PWM waveform generation method, device, embedded equipment and storage medium |
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