[Feature Request] Controlled shutdown for Hot Start. #203
Description
Subject of the issue
In order to take advantage of Hot Start with F9P and F9R (and maybe some others chips), one have to perform a controlled GNSS stop with BBR storage of parameters before power off. Hot Start may be very valuable (time saving) with F9R by avoiding or reducing IMU calibration and alignment process. This must be done with the UBX-CFG-RST command. Can this be added to the library?
Suggestion
void SFE_UBLOX_GNSS::controlledGNSSStop()
{
// Issue controlled GNSS stop
// Necessary for Hot Start after power off
packetCfg.cls = UBX_CLASS_CFG;
packetCfg.id = UBX_CFG_RST;
packetCfg.len = 4;
packetCfg.startingSpot = 0;
payloadCfg[0] = 0; // hot start
payloadCfg[1] = 0; // hot start
payloadCfg[2] = 0x08; // 0x08 = Controlled GNSS stop
payloadCfg[3] = 0; // reserved
sendCommand(&packetCfg, 0); // don't expect ACK
}
In opposite, I would also like to force Cold Start like:
void SFE_UBLOX_GNSS::forcedColdStart()
{
// Issue Controlled software reset with BBR clearing
packetCfg.cls = UBX_CLASS_CFG;
packetCfg.id = UBX_CFG_RST;
packetCfg.len = 4;
packetCfg.startingSpot = 0;
payloadCfg[0] = 0xFF; // cold start
payloadCfg[1] = 0xFF; // cold start
payloadCfg[2] = 0x01; // Controlled software reset
payloadCfg[3] = 0; // reserved
sendCommand(&packetCfg, 0); // don't expect ACK
}
(And, overall, is there a general process to trigger a command like UBX-CFG-RST with user parameters and not defining a function for each case?)