LX7730 -RTG4 Mi-V Sensors Pandhuan pangguna Demo
Pambuka
LX7730-RTG4 Mi-V Sensor Demo nduduhake LX7730 manager telemetri pesawat ruang angkasa kang kontrol dening RTG4 FPGA ngleksanakake Prosesor softcore CoreRISCV_AXI4, bagean saka Ekosistem Mi-V RISC-V. Dokumentasi kanggo CoreRISCV_AXI4 kasedhiya ing GitHub.
Gambar 1. LX7730-RTG4 Mi-V Sensor Diagram Sistem Demo
- Frekuensi SPI = 5MHz
- Baud Rate = 921600 bit/detik
LX7730 punika manager telemetri pesawat ruang angkasa sing ngemot 64 universal input multiplexer sing bisa diatur minangka campuran diferensial- utawa input sensor siji-rampung. Ana uga sumber saiki sing bisa diprogram sing bisa diarahake menyang salah siji saka 64 input universal. Input universal bisa sampmimpin karo ADC 12-dicokot, lan uga feed input tingkat loro karo batesan disetel dening DAC 8-dicokot internal. Ana tambahan DAC saiki 10-bit kanthi output pelengkap. Pungkasan, ana 8 input bi-level ambang tetep.
Tur kasebut kalebu PCB cilik sing ngemot 5 sensor sing beda-beda (Gambar 2 ing ngisor iki) sing disambungake menyang Papan Putri LX7730, Papan putri banjur disambungake langsung menyang Kit Pengembang RTG4 liwat konektor FMC ing loro Papan pembangunan. Demo maca data saka sensor (suhu, tekanan, kekuatan medan magnet, jarak, lan akselerasi 3-sumbu), lan nampilake ing GUI sing mlaku ing Windows PC.
Gambar 2. Papan Demo Sensor kanthi (saka kiwa menyang tengen) sensor tekanan, cahya, lan akselerometer
1 Nginstal piranti lunak
Instal ing NI Labview Run-Time Engine Installer yen durung ana ing komputer. Yen sampeyan ora yakin manawa sampeyan wis nginstal driver, banjur coba mlaku LX7730_Demo.exe. Yen pesen kesalahan katon kaya ing ngisor iki, sampeyan ora duwe driver diinstal lan kudu nglakoni.
Gambar 3. Labview Pesen kesalahan
Daya munggah lan program Papan RTG4 karo LX7730_Sensorinterface_MIV.stp binar, banjur daya mudhun maneh.
2 Prosedur Setup Hardware
Sampeyan mbutuhake Papan Putri LX7730 lan RTG4 FPGA DEV-KIT saliyane Papan Sensor Demo. Figure 4 ngisor nuduhake LX7730-DB disambungake menyang RTG4 DEV-KIT liwat konektor FMC.
Gambar 4. RTG4 DEV-KIT (kiwa) lan LX7730-DB kanthi papan putri (tengen)
Prosedur persiyapan hardware yaiku:
- Mulai karo loro Boards unplugged saka saben liyane
- Ing LX7730-DB, nyetel SPI_B geser ngalih SW4 ngiwa (LOW), lan nyetel SPI_A ngalih geser SW3 tengen (HIGH) kanggo milih antarmuka serial SPIB. Priksa manawa jumper ing LX7730-DB disetel menyang standar sing dituduhake ing pandhuan pangguna LX7730-DB.
- Pasang Papan Demo Sensor menyang LX7730-DB, copot papan mbah putri dhisik (yen dipasang). Konektor papan demo J10 disambungake menyang konektor LX7730-DB J376, lan J2 mathuk ing 8 baris konektor J359 ndhuwur (Gambar 5 ing ngisor iki)
- Pasang Papan Demo Sensor menyang Papan Putri LX7730. Konektor papan demo J10 disambungake menyang konektor Papan Putri LX7730 J376, lan J2 pas ing 8 baris konektor J359 ndhuwur
- Pasang Papan Putri LX7730 menyang papan RTG4 nggunakake konektor FMC
- Sambungake papan RTG4 menyang PC liwat USB
Gambar 5. Lokasi Konektor kawin J376, J359 ing Papan Putri LX7730 kanggo papan Demo Sensor
3 Operasi
Daya munggah SAMRH71F20-EK. LX7730-DB entuk kekuwatan saka SAMRH71F20-EK. Mbukak LX7730_Demo.exe GUI ing komputer sing disambungake. Pilih port COM sing cocog karo SAMRH71F20-EK saka menu gulung mudhun lan klik nyambung. Kaca pisanan antarmuka GUI nuduhake asil kanggo suhu, gaya, jarak, medan magnet (fluks), lan cahya. Kaca kapindho antarmuka GUI nuduhake asil saka tembang macapat 3-sumbu (Figure 6 ngisor).
Gambar 6. Antarmuka GUI
Gambar 7. Lokasi 6 Sensor
3.1 Eksperimen karo Sensor Suhu:
Ngganti suhu ing kisaran 0°C nganti +50°C watara sensor iki. Nilai suhu sing dirasakake bakal ditampilake ing GUI.
3.2 Eksperimen karo Sensor Tekanan
Pencet pucuk bunder sensor tekanan kanggo ngetrapake gaya. GUI bakal nuduhake asil output voltage, saben Figure 8 ngisor kanggo RM = 10kΩ mbukak.
Gambar 8. FSR 400 Resistance vs Force lan Output Voltage vs Force kanggo Various Load Resistors
3.3 Nyobi karo Sensor Jarak
Pindhah obyek adoh utawa cedhak (10cm nganti 80cm) menyang ndhuwur sensor jarak. Nilai jarak sing dirasakake bakal ditampilake ing GUI.
3.4 Nyobi karo Sensor Fluks Magnetik
Pindhah magnet adoh utawa cedhak karo sensor magnetik. Nilai fluks sing dirasakake bakal ditampilake ing GUI ing kisaran -25mT nganti 25mT.
3.5 Eksperimen karo Sensor Cahya
Ngganti padhange cahya watara sensor. Nilai cahya sing dirasakake bakal ditampilake ing GUI. Output voltagRentang e VOUT yaiku 0 nganti 5V (Tabel 1 ing ngisor iki) miturut Persamaan 1.
VOUT = 5× 10000/10000 + Rd V
Persamaan 1. Cahya Sensor Lux kanggo Voltage Karakteristik
Tabel 1. Sensor cahya
| Lux | Ketahanan Gelap Rd(kΩ) | VOUT |
| 0.1 | 900 |
0.05 |
|
1 |
100 | 0.45 |
| 10 | 30 |
1.25 |
|
100 |
6 | 3.125 |
| 1000 | 0.8 |
4.625 |
|
10,000 |
0.1 |
4.95 |
3.6 Nyobi karo Sensor Akselerasi
Data akselerometer sumbu 3 ditampilake ing GUI minangka cm/s², ing ngendi 1g = 981 cm/s².
Gambar 9. Tanggepan Accelerometer babagan orientasi gravitasi
- GRAVITI
4 Skema
Gambar 10. Skema
5 Tata letak PCB
Figure 11. PCB lapisan ndhuwur lan komponen ndhuwur, lapisan ngisor lan komponen ngisor (ngisor view)
6 Dhaptar Parts PCB
Cathetan perakitan ana ing warna biru.
Tabel 2. Bill of Materials
| Designators | Part | Jumlah | Jinis Bagean |
| C1, C2, C3, C4, C5, C6 | 10nF/50V-0805 (10nF nganti 1µF ditrima) | 6 | Kapasitor MLCC |
| C7, C8 | 1µF/25V-0805 (1µF nganti 10µF ditrima) | 2 | Kapasitor MLCC |
| j2, j10 | Sullins PPTC082LFBN-RC
|
2 | 16 posisi header 0.1″
Iki pas menyang underside saka PCB |
| R1, R2 | 10 kΩ | 2 | Resistor 10kΩ 1% 0805 |
| P1 | Sharp GP2Y0A21
|
1 | Sensor Optik 10 ~ 80cm Output Analog
Copot plug 3-pin putih, lan solder langsung menyang PCB karo 3 kabel |
| P2 | SparkFun SEN-09269
|
1 | ADI ADXL335, ± 3g 3 Axis Accelerometer ing PCB |
| Molex 0022102051
|
1 | Header pin persegi 5 posisi 0.1″
Solder menyang sisih ngisor papan akselerometer, saka VCC nganti Z. Bolongan ST ora digunakake |
|
| SparkFun PRT-10375
|
1 | 5 way 12" kabel pita 0.1"
Cut siji konektor, lan ngganti karo limang terminal crimped dipasang menyang polarized 5 posisi omah. Omah asli sing ora dipolarisasi disambungake menyang papan akselerometer, kanthi kabel abang ing VCC lan kabel biru ing Z |
|
| Molex 0022013057
|
1 | Housing polarisasi 5 posisi 0.1" | |
| Molex 0008500113
|
5 | Konektor crimp | |
| Molex 0022232051
|
1 | Konektor polarisasi 5 posisi 0.1″
Solder ing sisih ngisor PCB, kanthi orientasi supaya kabel abang ana ing ujung P2 nalika kabel pita 5 dipasang. |
|
| P3 | TI DRV5053
|
1 | Sensor Efek Hall Single Axis TO-92
Pas karo pasuryan warata madhep metu. Garis PCB 'D' salah |
| P4 | TI LM35
|
1 | Sensor Suhu Analog, 0°C ~ 100°C 10mV/°C TO-92
Tindakake outline PCB 'D' |
| P5 | Interlink 30-49649
|
1 | Sensor Tekanan / Tekanan - 0.04-4.5LBS |
| Molex 0016020096
|
2 | Konektor crimp
Crimp utawa solder terminal kanggo saben kabel Force / Sensor Tekanan |
|
| Molex 0050579002
|
1 | Housing 2 posisi 0.1"
Pasang terminal Force/Pressure Sensor menyang rong posisi njaba |
|
| Molex 0022102021
|
1 | Header pin persegi 2 posisi 0.1″
Solder menyang sisih ndhuwur PCB |
|
| P6 | Advanced Photonix PDV-P7002
|
1 | Light Dependent Resistor (LDR) |
| Molex 0016020096
|
2 | Konektor crimp
Crimp utawa solder terminal kanggo saben kabel LDR |
|
| Molex 0050579003
|
1 | Housing 3 posisi 0.1"
Pasang terminal LDR menyang rong posisi njaba |
|
| Molex 0022102031
|
1 | Header pin persegi 3 posisi 0.1″
Copot pin tengah. Solder menyang sisih ndhuwur PCB |
|
| U1 | Ing Semi MC7805CD2T
|
1 | 5V 1A Linear Voltage Regulator |
7 Riwayat Revisi
7.1 Revisi 1 – Mei 2023
release pisanan.
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MICROCHIP LX7730-RTG4 Mi-V Sensor Demo [pdf] Pandhuan pangguna LX7730-RTG4 Demo Sensor Mi-V, LX7730-RTG4, Demo Sensor Mi-V, Demo Sensor, Demo |
