Getting Current Voltage Input (VIN) on TS-7670 or TS-7400-V2

Here’s an example program our engineers might find useful. Kris Bahnsen, a long time engineer for Technologic Systems, wrote this simple program to get the voltage input (Vin) on the 8 – 28 VDC power rail on the TS-7670 (Rev. D or later) or TS-7400-V2 (Rev. B or later). Without going into too much detail about implementation of the on-board supervisory microcontroller, there is a register which is used to store various ADC values, including Vin. This example program basically polls this 4 byte register via I2C interface, accounts for the voltage divider (see TS-7670 schematic or TS-7400-V2 schematic), and spits out the Vin value. So, without further ado, here’s the code:

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Getting Current Voltage Input (VIN) on TS-7250-V2

Here’s an example program our engineers might find useful. Jesse Off, our lead engineer, wrote this simple program to get the voltage input (Vin) on the 8 – 28 VDC power rail on the TS-7250-V2 (Rev. B only). Without going into too much detail about implementation of the SiLabs microcontroller, there is a register which is used to store various ADC values, including Vin. This example program basically polls this 19 byte register via I2C interface, accounts for the voltage divider (see TS-7250-V2 schematic), and spits out the Vin value. So, without further ado, here’s the code:

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