Armando47/Hardware: Difference between revisions
No edit summary |
|||
| Line 68: | Line 68: | ||
SW1: ''This switch input will select the primary or secondary operating parameters. When left floating, or at 5 volts, the primary parameters are used. When grounded, secondary parameters are used. Whenever this switch is changed, the timers are reset, the Carried Detect LED (D2) will blink rapidly for a short time, and then a transmission will be sent. SW1 is also available on J1 pin 4. This switch input is optional, and can be left unconnected.'' | SW1: ''This switch input will select the primary or secondary operating parameters. When left floating, or at 5 volts, the primary parameters are used. When grounded, secondary parameters are used. Whenever this switch is changed, the timers are reset, the Carried Detect LED (D2) will blink rapidly for a short time, and then a transmission will be sent. SW1 is also available on J1 pin 4. This switch input is optional, and can be left unconnected.'' | ||
=== UEXT === | |||
https://www.olimex.com/Products/Modules/UEXT/ | |||
=== Seriali === | === Seriali === | ||
Revision as of 09:19, 24 March 2015
L'hardware di Armando47 deve essere:
- compatto: non piu di 500mmq
- semplice
- facile da assemblare senza attrezzatura specifica: solo componenti in package 1206, DIP, SOT e SOIC
- economico
- robusto
PCB
il circuito stampato + componenti avra spessore minimo (6 mm), e dovrebbe essere abbastanza piccolo (4 - 5 cm2)
Connessioni
sulla scheda sono saldati pin header maschio. passo 2.54, 2 o 1.27 mm ?
Connettore GPIO
header 4 pin, ad uso generico (radiocomandi) e per esporre i simboli in maniera digitale
| 1 | GPIO0 | |
| 2 | GPIO1 | |
| 3 | GPIO2 | |
| 4 | GPIO3 | |
| 5 | GPIO4 | |
| 6 | GPIO5 | |
| 7 | GPIO6 | |
| 8 | GPIO7 |
Connettore TinyTrack
header 8 pin
ha tutto quel che serve lato radio
va collegato a un db9 col pinout usato da quelli di tinytrack http://www.byonics.com/tinytrak4/
| 1 | AUDIO_OUT | Audio out |
| 2 | CARR_DET | Carrier detect |
| 3 | PTT_OUT | PTT Out |
| 4 | SW1 | Switch (vedi sotto) |
| 5 | AUDIO_IN | Audio in |
| 6 | GND | Ground |
| 7 | VDD | Ingresso positivo alimentazione non regolato |
| 8 | PTT_IN | PTT In |
SW1: This switch input will select the primary or secondary operating parameters. When left floating, or at 5 volts, the primary parameters are used. When grounded, secondary parameters are used. Whenever this switch is changed, the timers are reset, the Carried Detect LED (D2) will blink rapidly for a short time, and then a transmission will be sent. SW1 is also available on J1 pin 4. This switch input is optional, and can be left unconnected.
UEXT
https://www.olimex.com/Products/Modules/UEXT/
Seriali
In-Band
header 1x3 pin
solo ed esclusivamente i dati trasmessi e ricevuti non ha flow control (ne HW ne SW), bisogna studiare una strategia magari usando la out-band uart
| 1 | U1_RX | UART1 receive. |
| 2 | U1_TX | UART1 transmit. |
| 3 | U1_GND | Ground |
Out-Band
header 1x3 pin
espone un terminale tty con menu di configurazione, applicazioni di chat, ecc
| 1 | U2_RX | UART2 receive. |
| 2 | U2_TX | UART2 transmit. |
| 3 | U2_GND | Ground |
Connettore programmazione
Serve per poter programmare il pic una volta installato. Vanno ai rispettivi pin sul uC.
| Pin | Funzione | Nome |
|---|---|---|
| 1 | Abilitazione programmazione | ICSP_MCLR |
| 2 | Positivo. Dev'essere interrompibile con jumper | VDD |
| 3 | Negativo | VSS |
| 4 | Dati programmazione | ICSP_DATA |
| 5 | Clock programmazione | ICSP_CLOCK |
| 6 | Non usato | Aux |
Connettore alimentazione
| Pin | Funzione | Nome |
|---|---|---|
| 1 | input a monte del regolatore | RAW_VDD_INPUT |
| 2 | output del regolatore | REG_VDD_OUTPUT |
| 3 | input 3.3 regolati | VDD |
| 4 | massa | VSS |
Componenti interni
- processore: dspic33fj128gp802 oppure dsPIC33FJ128GP804 se i piedini non ci bastano
- quarzo 8mhz
- quarzo 32khz
- op-amp filtro antialias input ADC 1/2 MCP6022 http://ww1.microchip.com/downloads/en/DeviceDoc/21685d.pdf
- op amp uscita DAC 1/2 MCP6022
- condensatori di livellamento vari
Filtro anti-aliasing
4th order Butterworth (2 x sallen-key)
Buffer uscita DAC
http://ww1.microchip.com/downloads/en/DeviceDoc/70211B.pdf
1/2 MCP6022
uC
http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en532298 dsPIC33FJ128GP802
- RAM: 16K
- Flash: 128K
- Timers: 5
- UART: 2
- primitive DSP
- ADC >=12bit
- DAC >=12bit
Power Management
quando non e' attivo ne il PTT ne il Carrier Detect, ne arrivano dati sulla UART, il device va in idle mode. avendo piedini per farlo si potrebbe anche spegnere l'LDO analogico.
Mappa pin
| Pin | Funzione | Nome | porta sul uC |
|---|---|---|---|
| 1 | MCLR | MCLR | |
| 2 | GPIO0 | AN0/VREF+/CN2/RA0 | |
| 3 | GPIO1 | AN1/VREF-/CN3/RA1 | |
| 4 | Dati ICSP/GPIO2/PWM0/ANALOG0 | PGED1/AN2/C2IN-/RP0(1)/CN4/RB0 | |
| 5 | Clock ICSP/GPIO3/PWM1/ANALOG1 | PGEC1/ AN3/C2IN+/RP1(1)/CN5/RB1 | |
| 6 | GPIO4/PWM2/ANALOG2 | AN4/C1IN-/RP2/CN6/RB2 | |
| 7 | GPIO5/PWM3/ANALOG3 | AN5/C1IN+/RP3/CN7/RB3 | |
| 8 | V - | VSS | |
| 9 | Xtal 32MHz | OSC1/CLKI/CN30/RA2 | |
| 10 | Xtal 32MHz | OSC2/CLKO/CN29/PMA0/RA3 | |
| 11 | GPIO6 | SOSCI/RP4(1)/CN1/PMBE/RB4 | |
| 12 | GPIO7 | SOSCO/T1CK/CN0/PMA1/RA4 | |
| 13 | V + | VDD | |
| 14 | U1RX registro RPINR18 | PGED3/ASDA1/RP5 /CN27/PMD7/RB5 | |
| 15 | U1TX RP 00011 | PGEC3/ASCL1/RP6(1)/CN24/PMD6/RB6 | |
| 16 | U2RX registro RPINR19 | INT0/RP7(1)/CN23/PMD5/RB7 | |
| 17 | U2TX RP 00101 | TCK/SCL1/RP8(1)/CN22/PMD4/RB8 | |
| 18 | Carrier Detect | TDO/SDA1/RP9(1)/CN21/PMD3/RB9 | |
| 19 | V - | VSS | |
| 20 | 10 uF tantalio verso VSS | VCAP | |
| 21 | PTT In | PGED2/TDI/RP10(1)/CN16/PMD2/RB10 | |
| 22 | PTT Out | PGEC2/TMS/RP11(1)/CN15/PMD1/RB11 | |
| 23 | DAC left + | AN12/DAC1RP/RP12(1)/CN14/PMD0/RB12 | |
| 24 | DAC left - | AN11/DAC1RN/RP13(1)/CN13/PMRD/RB13 | |
| 25 | ADC Audio In | AN10/DAC1LP/RTCC/RP14(1)/CN12/PMWR/RB14 | |
| 26 | ADC Vbatt In | AN9/DAC1LN/RP15(1)/CN11/PMCS1/RB15 | |
| 27 | V - analogico | AVSS | |
| 28 | V + analogico | AVDD |