datalogger/dlrena

DLrena (DataLoggerRENA)

The plan:

• Start from a copy of nmrena, remove the FPGA, wire up the ADC and DAC to the SSP of the ARM.

Pressure Sensor MS5534C

• Via SSP
• Use P0.16 Timer0, Match 2 output for 32768kHz MCLK.
• (Use a 74LVC2G125 (MSOP8) to gate MISO and MOSI to DIN and DOUT.)
• Use a 74LVC4T3144 for each Sensor to gate off all pins.
• P1.24/25 as chip select, ¿and one GPIO for the external sensor?

ADC ADS8688

• Via SSP, SSEL1 as ship select
• AUX_IN connected to DAC(A)

DAC

• new layput LTC1655 (one channel)?
• copy from nmrena: LTC2656 (eight channels)
• copy from nmrena: ADA4177 as driver.
• P1.24/25 as chip select

UART

• AD1.1, RxD1 via MAX3232.

GPIO

• P1.16…23, 8× Digital IO

HK ADCs

• 2× frontend, U_PRIM, I_PRIM
• 3× power in (+6V, ±12V)
• 2× current ±12V ? or use as SSEL?

DLpower

The frontend board board will be connected via two 64-pin mezzanine connectors. Those shall be bussed through to plugins on top.

IRENA mezzanine

• shall be pin compatible with IRENA
• provide the plugin SPI
• USB
• UART0
• +3.3V ARM power
• +6V analog power, floating
• ±12V frontend power, floating
• two ARM ADCs inputs

frontend mezzanine

• 8× AIN
• 4× AOUT
• 2× RS232
• 8× GPIO (optionally, 2× RS232 levels, input jumpered)
• ±12V power
• +3V power (pressure sensor)
• 4× MS5534C IO for external pressure sensor (separate SSEL?)

Tools

• Schematic entry: lepton-Schematic
• netlisting: ¿gnetlist?
• layout: pcb(-gtk)
• documentation: gerbv