CN203759949U - DSP2812-based experimental development board - Google Patents
DSP2812-based experimental development board Download PDFInfo
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- CN203759949U CN203759949U CN201420119526.7U CN201420119526U CN203759949U CN 203759949 U CN203759949 U CN 203759949U CN 201420119526 U CN201420119526 U CN 201420119526U CN 203759949 U CN203759949 U CN 203759949U
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Abstract
The utility model provides a DSP2812-based experimental development board. The development board comprises a base plate, the base plate is provided with a central processor system, a power supply circuit is arranged over the central processor system, a GPIO unit is arranged on the right of the central processor system, a bus and an integrated application apparatus of the experimental development board are arranged under the central processor system, and an IO extended port is arranged on the left of the central processor system. The DSP2812-based experimental development board is simple in circuit structure and reasonable in design, and can be processed into either a finished product or a development board suite that can be used by a DSP learner, the development board suite is composed of a circuit, a PCB and components which need to be welded to the PCB, use is flexible and convenient, and compared with a traditional experimental box, the cost is low, the use effects are sound and convenience is provided for popularization and use.
Description
Technical field
The utility model relates to experimental facilities technical field, relates in particular to a kind of based on DSP2812 experimental development board of multi.
Background technology
Dsp chip, also claims digital signal processor, is a kind of microprocessor that is particularly suitable for carrying out digital signal processing computing, and it is mainly applied is to realize real-time various digital signal processing algorithms.Dsp processor has been widely used in the fields such as wireless product, PDA, GPS, consumer electronics, automotive electronics, Industry Control, medical product, smart card.Traditional DSP experimental development board of multi function is limited, cannot meet the requirement of DSP basic learning, and the acp chip of development board and other components and parts integrate, and has brought very large inconvenience to study exploitation.
Utility model content
It is a kind of based on DSP2812 experimental development board of multi that the utility model provides, and circuit structure is simple, reasonable in design, and experiment is flexible, is conducive to DSP study fan and grasps rapidly the DSP microprocessor technology of current develop rapidly, realizes that cost is low and result of use good.
In order to address the above problem, it is a kind of based on DSP2812 experimental development board of multi that the utility model provides, comprise base plate, on described base plate, be provided with central processing unit system, central processing unit upside is provided with power supply circuit, described central processing unit system right side is provided with GPIO input-output device, and the downside of described central processing unit system is provided with bus and brassboard integrated application equipment, and the left side of described central processing unit system is provided with IO expansion mouthful.
Further improve and be: crystal oscillating circuit, reset circuit, jtag interface circuit and electric source filter circuit that described central processing unit system includes dsp processor and joins with dsp processor.
Further improve and be: described power supply circuit includes power supply and power-switching circuit module.
Further improve and be: described GPIO input-output device includes matrix LCD, group of four figures pipe, independent button and hummer and running lamp.
Further improve and be: described bus comprises that USB turns serial port module, Zigbee wireless transport module, CAN bus module and I2C bus module, and described brassboard integrated application equipment includes temperature sensor, clock module and motor drive module.
Further improve and be: described dsp processor is TMS320F2812.
Further improve and be: the power supply of described power supply circuit can selector switch power supply adaptor or USB.
Further improve and be: described matrix LCD is LCD12864, group of four figures pipe is common cathode charactron and uses HD7279 chip drives, and independent button is made up of five buttons.
Further improve and be: the RS232-USB interface convertor that described USB turns in serial port module is PL2303, wireless transport module is SZ05 series ZigBee embedded radio digital transmission module, CAN transmitter-receiver in CAN bus module is SN65HVD232, and the E2PROM in I2C bus module is 24C02.
Further improve and be: temperature sensor is 18B20, and the clock chip in clock module is DS1302, and the motor drive ic in motor drive module is L298N.
The beneficial effects of the utility model are: the utility model circuit structure is simple, reasonable in design, both can be processed into finished product and directly offer DSP learner's use, also can be made into development board external member and offer DSP learner's use, development board external member is made up of the components and parts that need welding on circuit diagram of the present utility model, the pcb board producing and pcb board, flexible and convenient to use, realize than traditional experimental box that cost is low and result of use good, be convenient to promote practical.
Brief description of the drawings
Fig. 1 is schematic diagram of the present utility model.
Fig. 2 and Fig. 3 are the utility model power supply circuit schematic diagrams.
Fig. 4 is independent key circuit schematic diagram of the present utility model.
Fig. 5 is running lamp circuit theory diagrams of the present utility model.
Fig. 6 is matrix LCD circuit theory diagrams of the present utility model.
Fig. 7 is buzzer circuit schematic diagram of the present utility model.
Fig. 8 is wireless transport module circuit theory diagrams of the present utility model.
Fig. 9 is motor-drive circuit schematic diagram of the present utility model.
Figure 10 is RS232-USB interface conversion circuit schematic diagram of the present utility model.
Figure 11 is group of four figures pipe circuit theory diagrams of the present utility model.
Figure 12 is CAN transmitter/receiver circuit schematic diagram of the present utility model.
Figure 13 is E2PROM circuit theory diagrams of the present utility model.
Figure 14 is real time clock circuit schematic diagram of the present utility model.
Figure 15 is temperature sensor circuit schematic diagram of the present utility model.
Figure 16 and Figure 17 and Figure 18 are IO expanded circuit figure of the present utility model.
Wherein: 1-central processing unit system, 2-power supply circuit, 3-GPIO input-output device, 4-bus, 5-brassboard integrated application equipment, 6-IO expands mouth.
Embodiment
In order to deepen understanding of the present utility model, below in conjunction with embodiment, the utility model is described in further detail, and this embodiment only, for explaining the utility model, does not form the restriction to the utility model protection domain.
As shown in Figure 1, it is a kind of based on DSP2812 experimental development board of multi that the present embodiment provides, comprise base plate, on described base plate, be provided with central processing unit system 1, central processing unit system 1 upside is provided with power supply circuit 2, described central processing unit system 1 right side is provided with GPIO input-output device 3, and the downside of described central processing unit system 1 is provided with bus 4 and brassboard integrated application equipment 5, and the left side of described central processing unit system 1 is provided with IO expansion mouth 6.Crystal oscillating circuit 1-2, reset circuit 1-3, jtag interface circuit 1-4 and electric source filter circuit 1-5 that described central processing unit system 1 includes dsp processor 1-1 and joins with dsp processor 1-1.Described power supply circuit 2 includes power supply 2-1 and power-switching circuit module 2-2.Described GPIO input-output device 3 includes matrix LCD 3-1, group of four figures pipe 3-2, independent button and hummer 3-3 and running lamp 3-4.Described bus 4 comprises that USB turns serial port module 4-1, Zigbee wireless transport module 4-2, CAN bus module 4-3 and I2C bus module 4-4, and described brassboard integrated application equipment includes temperature sensor 5-1, clock module 5-2 and motor drive module 5-3.Described dsp processor 1-1 is TMS320F2812.The power supply 2-1 of described power supply circuit 2 can selector switch power supply adaptor or USB.Described matrix LCD 3-1 is LCD12864, and group of four figures pipe 3-2 is common cathode charactron and uses HD7279 chip drives, and independent button 3-3 is made up of five buttons.The RS232-USB interface convertor that described USB turns in serial port module 4-1 is PL2303, wireless transport module 4-2 is SZ05 series ZigBee embedded radio digital transmission module, CAN transmitter-receiver in CAN bus module 4-3 is SN65HVD232, and the E2PROM in I2C bus module 4-4 is 24C02.Temperature sensor 5-1 is 18B20, and the clock chip in clock module 5-2 is DS1302, and the motor drive ic in motor drive module 5-3 is L298N.
As shown in Figure 2,3, when DSP2812 works, desired operating voltage is divided into two parts: the FLASH voltage of 3.3V and the core voltage of 1.8V.Because DSP2812 is very sensitive to power supply, so select the power supply chip TPS767D318 that voltage accuracy is higher.TPS767D318 chip input voltage 5V, chip starting of oscillation, after normal work, two kinds of voltages that can produce 3.3V and 1.8V offer DSP and use.
As shown in Figure 2,3, LED0, LED1, LED2 are 5V, 3.3V, 1.8V power light, digitally and in analog, use magnetic bead connect.Power supply chip DY05S12 converts 5V power supply to 12V power supply.
As shown in Figure 4, button 1～4 connects respectively at GPIOB0～GPIOB3 of DSP2812, and button 5 is connected with GPIOE2, for providing external interrupt to DSP2812.And GPIOB0～GPIOB3 and GPIOE2 are connected the pull-up resistor of 10K.
As shown in Figure 5, running lamp D1～D8 is connected with GPIOA7～GPIOA14 of DSP2812 respectively, and in the time of GPIOA7～GPIOA14 high level, D1～D8 extinguishes, and when GPIOA7～GPIOA14 low level, D1～D8 lights.
As shown in Figure 6, matrix LCD is selected LCD12864, and data-interface DB0～DB7 of LCD12864 is connected with GPIOB4～GPIOB11 respectively, RS pin is connected with GPIOB11, this pin function is instruction data selection, and high level is data pattern, is instruction mode when low level.The direct ground connection of R/W pin, this pin is chip read-write end, and high level is for reading, and low level is for writing.E pin connects GPIOB11, and this pin is chip enable end, and high level enables, negative edge latch.VO pin is LCD input voltage, the negative pressure output that VEE is module.CSA, CSB are chip 1,2 selecting sides, and high level is selected.VSS be power supply (0V), VDD is module voltage (5V), BLA and BLK are liquid crystal display voltage backlight.
As shown in Figure 7, R17 connects GPIOD6, and in the time of GPIOD6 high level, hummer rings.
As shown in Figure 8, wireless transport module is selected along boat science and technology SZ05 series Z-BEE embedded radio serial communication modular, it has adopted reinforced ZIGBEE wireless technology, meet the radio data communication equipment of industrial standard application, advantage and the characteristics such as it has, and communication distance is far away, antijamming capability strong, networking flexibility; Can realize the data transparent transmission of many equipment rooms.SZ05-ZBEE wireless communication module provides standard RS232, RS485 and three kinds of interface standards of TTL transmitting-receiving.RS232 serial ports is TX2, RX2, GND tri-lineman's operation modes; RS485 serial ports is TX2 (A+), RX2 (B-) two lineman's operation modes; TTL is TX1, RX1 two lineman's operation modes, and Transistor-Transistor Logic level is 3.3V.
As shown in Figure 8 the AD4 of wireless transport module, RUN, NET and ALM pin connect respectively LED lamp, carry out respectively data transmission, module operation, network and warning instruction, the TX1 of wireless transport module, SCI_RXDB and the SCI_TXDB that RX1 is connected respectively to DSP2812, DSP2812 sends data to wireless transport module by SCI_RXDB and SCI_TXDB.
As shown in Figure 9, motor drive ic L298N, L298N is special drive integrated circult, belong to H bridge integrated circuit, its output current is 2A, maximum current 4A, maximum operating voltage 50V, can drive inductive load, as high power DC electric machine, stepper motor, solenoid valve etc., particularly its input end can directly be connected with DSP, thereby controlled by DSP.Directly control step motor and drive direct current generator, and can realize motor forward and reverse, realizes this function and only need change the logic level of input end.
GPIOA0～GPIOA3 of DSP2812 is connected to the IN1～IN4 of motor drive ic as shown in figure 10, can drive a four phase step motor, two two-phase direct current generators and four phase steering wheels.
Change-over circuit has been selected PL2303 as shown in figure 10, PL2303 is the integrated RS232-USB interface convertor of a kind of height that Prolific company produces, and can provide a RS232 full duplex asynchronous serial communication device and USB functional interface the convenient solution connecting.This device internal USB function control device, USB transceiver, oscillator and the UART with whole modem control signals, only need external several electric capacity just can realize the conversion of USB signal and RS232 signal, this device is as USB/RS232 bidirectional transducer, and one side receives USB data and is converted into RS232 information flow form from main frame and sends to peripheral hardware; Be converted to USB data layout from RS232 peripheral hardware reception data on the other hand and send back main frame, these work are all completed automatically by device.The SCI_RXDA of DSP2812 and SCI_TXDA are connected to TXD and the RXD pin of PL2303 as shown in Figure 9.The DM of PL2303 and DP pin are connected to USB through 33 Europe resistance.
As shown in figure 11, GPIOA4～GPIOA6 of DSP2812 is connected to the CS of HD7279, CLK and DATA pin, and CS is that sheet selects input end, when this pin low level, can send instruction to chip.CLK is synchronous clock input end, sends data to chip, when this pin rising edge, represents that data are effective.DATA is serial data input/output terminal, and in the time that chip receives instruction, this pin is for being input end.SG～SA section of being g～section a driver output.DP is radix point output, and DIG0～DIG7 is the driver output of numeral 0～numeral 7.
As shown in figure 12, DSP2812 has an eCAN module, supports CAN2.0B agreement, can realize the communication of CAN network.Conventionally, the signal in CAN bus uses differential voltage to transmit, and two signal line are called as CAN_H and CAN_L, is 2.5V left and right when static, and state representation is at this time logical one, also can be called " recessiveness " level.With the level of the CAN_H state representation logical zero higher than the level of CAN_L, be called " dominant " level, now, the level of CAN_H is 3.5V conventionally, the level of CAN_L is 1.5V.For the level of the eCAN module that makes DSP2812 meets high-speed CAN bus level nature, between eCAN module and CAN module, need to add the level conversion device of CAN, as the CAN receiver transmitter SN65HVD232 of 3.3V, 1,4 pins of SN65HVD232 are connected respectively to CAN_TX and the CAN_RX of DSP.
As shown in figure 13, the storage chip that after EPROM (Electrically Erasable Programmable ROM, Electrically Erasable Read Only Memory)-a kind of power down, data are not lost, adopts EEPROM can solve power-down data protection problem.The 24C02 that this experimental development board of multi is selected, adopts iic bus interface.Iic bus forms communication line by data line SDA and two lines of clock line SCL, and the device of receiving bus both can send data, also can receive data.Data on SDA line must keep stable at the high level of clock, and the high or low level state of data line only could change in the time that the clock signal of SCL line is low level.5,6 pins of shown 24C02 are connected respectively to I2C_DATA and the I2C_CLK of DSP.
Adopt as shown in figure 14 DS1302 chip, DS1302 is the trickle charge clock chip that DALLAS company releases, contain a real-time clock/calendar and 31 byte static RAM (SRAM)s, communicate real-time clock/calendar circuit by simple serial line interface and single-chip microcomputer. second date timesharing day is provided. the information in month year, number of days monthly and the number of days in leap year can automatically be adjusted clock operation and can be indicated and be determined to adopt 24 or 12 hours forms by AM/PM, between DS1302 and DSP, adopt the mode of synchronous serial to communicate, only need to use three mouth lines: 1 RES resets, 2 I/O data lines, 3 SCLK serial clocks. the read/write data of clock/RAM with a byte or nearly the character group mode of 31 bytes communicate by letter.When DS1302 work, power consumption is very low, while keeping data and clock information, power is less than 1mW, its dual power supply pin is for primary power and backup battery supply Vcc1, for additional seven byte memorys of trickle charge power supply able to programme, the pin 5,6,7 of DS1302 is connected respectively to GPIOF9, GPIOF10 and the GPIOF11 of DSP.
As shown in figure 15, temperature sensor is selected 18B20, and pin 1 is for being power supply ground, and pin 2 is digital signal input/output terminal, and pin 3 is external power supply input end.It is-55 ° of C ~+125 ° C that 18B20 measures temperature range, and within the scope of-10 ~+85 ° of C, precision is ± 0.5 ° of C.Scene temperature, directly with the digital form transmission of " one-wire bus ", has improved the anti-interference of system greatly, and the pin 2 of 18B20 is connected to the GPIOF8 of DSP.
As shown in Figure 16,17,18, the external interface of DSP (XINTF), ADC interface etc. are connected to the IO expansion mouthful of experimental development board of multi, for further exploitation study.
When the utility model uses, experiment teacher can provide development board external member to student, and external member comprises the components and parts that need welding on circuit diagram of the present utility model, the pcb board producing and pcb board, forms the components and parts of each functional unit in the utility model.Student takes after development board external member, can first learning circuit figure, then according to the annexation in circuit diagram, components and parts are welded on pcb board, and so just complete making of the present utility model.Use the utility model to test, the circuit that DSP study fan can either grasp DSP experimental development board of multi connects, and can grasp again dsp program, is conducive to the rapid dsp processor technology of grasping current develop rapidly of DSP study fan.
Claims (10)
1. one kind based on DSP2812 experimental development board of multi, comprise base plate, it is characterized in that: on described base plate, be provided with central processing unit system (1), central processing unit system (1) upside is provided with power supply circuit (2), described central processing unit system (1) right side is provided with GPIO input-output device (3), the downside of described central processing unit system (1) is provided with bus (4) and brassboard integrated application equipment (5), and the left side of described central processing unit system (1) is provided with IO expansion mouthful (6).
2. one as claimed in claim 1, based on DSP2812 experimental development board of multi, is characterized in that: crystal oscillating circuit (1-2), reset circuit (1-3), jtag interface circuit (1-4) and electric source filter circuit (1-5) that described central processing unit system (1) includes dsp processor (1-1) and joins with dsp processor (1-1).
3. one as claimed in claim 1, based on DSP2812 experimental development board of multi, is characterized in that: described power supply circuit (2) includes power supply (2-1) and power-switching circuit module (2-2).
4. one as claimed in claim 1, based on DSP2812 experimental development board of multi, is characterized in that: described GPIO input-output device (3) includes matrix LCD (3-1), group of four figures pipe (3-2), independent button and hummer (3-3) and running lamp (3-4).
5. one as claimed in claim 1 is based on DSP2812 experimental development board of multi, it is characterized in that: described bus (4) comprises that USB turns serial port module (4-1), Zigbee wireless transport module (4-2), CAN bus module (4-3) and I2C bus module (4-4), and described brassboard integrated application equipment includes temperature sensor (5-1), clock module (5-2) and motor drive module (5-3).
6. one as claimed in claim 2, based on DSP2812 experimental development board of multi, is characterized in that: described dsp processor (1-1) is TMS320F2812.
7. one as claimed in claim 3, based on DSP2812 experimental development board of multi, is characterized in that: the power supply (2-1) of described power supply circuit (2) can selector switch power supply adaptor or USB.
8. one as claimed in claim 4 is based on DSP2812 experimental development board of multi, it is characterized in that: described matrix LCD (3-1) is LCD12864, group of four figures pipe (3-2) is for common cathode charactron and use HD7279 chip drives, and independent button (3-3) is made up of five buttons.
9. one as claimed in claim 5 is based on DSP2812 experimental development board of multi, it is characterized in that: the RS232-USB interface convertor that described USB turns in serial port module (4-1) is PL2303, wireless transport module (4-2) is SZ05 series ZigBee embedded radio digital transmission module, CAN transmitter-receiver in CAN bus module (4-3) is SN65HVD232, and the E2PROM in I2C bus module (4-4) is 24C02.
10. one as claimed in claim 5 is based on DSP2812 experimental development board of multi, it is characterized in that: temperature sensor (5-1) is 18B20, clock chip in clock module (5-2) is DS1302, and the motor drive ic in motor drive module (5-3) is L298N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420119526.7U CN203759949U (en) | 2014-03-18 | 2014-03-18 | DSP2812-based experimental development board |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420119526.7U CN203759949U (en) | 2014-03-18 | 2014-03-18 | DSP2812-based experimental development board |
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| CN203759949U true CN203759949U (en) | 2014-08-06 |
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| CN201420119526.7U Expired - Fee Related CN203759949U (en) | 2014-03-18 | 2014-03-18 | DSP2812-based experimental development board |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104317691A (en) * | 2014-10-24 | 2015-01-28 | 中国重汽集团济南动力有限公司 | Simulation debugging and code downloading tool |
| CN105047051A (en) * | 2015-04-28 | 2015-11-11 | 北京百科融创教学仪器设备有限公司 | Digital signal processing (DSP) experimental box for teaching purpose |
| CN114627744A (en) * | 2022-03-18 | 2022-06-14 | 深圳市天辰防务通信技术有限公司 | Console simulation device |
-
2014
- 2014-03-18 CN CN201420119526.7U patent/CN203759949U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104317691A (en) * | 2014-10-24 | 2015-01-28 | 中国重汽集团济南动力有限公司 | Simulation debugging and code downloading tool |
| CN105047051A (en) * | 2015-04-28 | 2015-11-11 | 北京百科融创教学仪器设备有限公司 | Digital signal processing (DSP) experimental box for teaching purpose |
| CN114627744A (en) * | 2022-03-18 | 2022-06-14 | 深圳市天辰防务通信技术有限公司 | Console simulation device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20150318 |
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| EXPY | Termination of patent right or utility model |