Dear Sir,
When I am study TI's software demo about AFE4300 calibration(the name of demo is "TI Health Hub SW"). I have some questions:
1. May I think BCM calibration is actually impedance calibration, is it?
2. As TI use 4 reference resistors in the hardware circuit, these values are: 100 ohm, 200 ohm, 700 ohm, 950 ohm. How to choose these values? What are they base on?
3. In the source code:
// Voltage codes for calibration resistors
#define CALI_CODE1 1179
#define CALI_CODE2 10683
I think these values are set before main program runs, I do not know how to get these values?
4. When calculate resistance by AFE4300 as below:
void calcResistance()
{
resistance = (voltageCode - fwYint)/fwSlope;
What's this formula? Where can I get this formula? If from the doc named"Impedance Measurement with the AFE4300.pdf", there is a formula in Page 3, section 2: Mag = m´ v + o. What's the difference between this formula and the "resistance = (voltageCode - fwYint)/fwSlope;"?
Thanks.
Best Regards
Hongwei
