private void BtnStartClick(object sender, EventArgs e)
{
// Get a list of all available MEA USB Devices such as the MEA2100, for example.
CMcsUsbListNet cDeviceList = new CMcsUsbListNet(DeviceEnumNet.MCS_MEAUSB_DEVICE);
if (cDeviceList.Count == 0)
{
MessageBox.Show("No MEA USB Device connected!", "Error Connecting To Device", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
var deviceEntry = cDeviceList.GetUsbListEntry(0);
CStg200xDownloadNet cStgDevice = new CStg200xDownloadNet();
// Connect to the stimulator of the device. The lock mask allows multiple connections to the same device
cStgDevice.Connect(deviceEntry, 1);
uint electrode = 3;
// ElectrodeMode: emManual: electrode is permanently selected for stimulation
cStgDevice.SetElectrodeMode(electrode, ElectrodeModeEnumNet.emManual);
// ElectrodeDacMux: DAC to use for stimulation
cStgDevice.SetElectrodeDacMux(electrode, 0, ElectrodeDacMuxEnumNet.Stg1);
// ElectrodeEnable: enable electrode for stimulation
cStgDevice.SetElectrodeEnable(electrode, 0, true);
// BlankingEnable: false: do not blank the ADC signal while stimulation is running
cStgDevice.SetBlankingEnable(electrode, false);
// AmplifierProtectionSwitch: false: Keep ADC connected to electrode even while stimulation is running
cStgDevice.SetEnableAmplifierProtectionSwitch(electrode, false);
// array of amplitudes and duration
int[] amplitude = new int[2] {
10000, -10000
}; // µV
ulong[] duration = new ulong[2] {
100000, 100000
}; // µs
// use voltage stimulation
cStgDevice.SetVoltageMode();
// send stimulus data to device
cStgDevice.PrepareAndSendData(0, amplitude, duration, STG_DestinationEnumNet.channeldata_voltage);
// connect all stimulation channels to the first trigger
cStgDevice.SetupTrigger(0, new uint[] { 255 }, new uint[] { 255 }, new uint[] { 1 });
// start the first trigger
cStgDevice.SendStart(1);
cStgDevice.Disconnect();
MessageBox.Show("Stimulation finished!");
}
private void btStart_Click(object sender, EventArgs e)
{
int DACResolution = device.GetDACResolution();
device.SetCurrentMode();
device.GetCurrentRangeInNanoAmp(0);
device.GetCurrentResolutionInNanoAmp(0);
device.SendSegmentSelect(0, Stg200xSegmentFlagsEnumNet.None);
// Setup Trigger
uint triggerInputs = device.GetNumberOfTriggerInputs();
uint[] channelmap = new uint[triggerInputs];
uint[] syncoutmap = new uint[triggerInputs];
uint[] repeat = new uint[triggerInputs];
for (int i = 0; i < triggerInputs; i++)
{
channelmap[i] = 0;
syncoutmap[i] = 0;
repeat[i] = 0;
}
// Trigger 0
channelmap[0] = 1; // Channel 1
syncoutmap[0] = 1; // Syncout 1
repeat[0] = 0; // forever
// Trigger 1
channelmap[1] = 4; // Channel 3
device.SetupTrigger(0, channelmap, syncoutmap, repeat);
// Data for Channel 0
{
device.ClearChannelData(0);
double factor = 1;
const int l = 1000;
// without compression
ushort[] pData = new ushort[l];
ulong[] tData = new ulong[l];
for (int i = 0; i < l; i++)
{
// calculate Sin-Wave
double sin = factor * (Math.Pow(2, DACResolution - 1) - 1.0) * Math.Sin(2.0 * i * Math.PI / l);
// calculate sign
pData[i] = sin >= 0 ? (ushort)sin : (ushort)((int)Math.Abs(sin) + (int)Math.Pow(2, DACResolution - 1));
tData[i] = 20; // duration in µs
}
device.SendChannelData(0, pData, tData);
/*
* // with compression
* List<ushort> pData = new List<ushort>();
* List<UInt64> tData = new List<UInt64>();
* int j = 0;
* for (int i = 0; i < l; i++)
* {
* // calculate Sin-Wave
* double sin = factor * (Math.Pow(2, DACResolution - 1) - 1.0) *
* Math.Sin(2.0 * (double)i * Math.PI / (double)l);
*
* // calculate sign
* ushort newval = sin >= 0 ? (ushort)sin : (ushort)((int)Math.Abs(sin) +
* (int)Math.Pow(2, DACResolution - 1));
*
* // do compression, duration in µs
* if (j > 0 && pData[j - 1] == newval)
* {
* tData[j - 1] += 20;
* }
* else
* {
* pData.Add(newval);
* tData.Add(20);
* j++;
* }
* }
* device.SendChannelData(0, pData.ToArray(), tData.ToArray());
*/
}
// Data for Channel 3
{
device.ClearChannelData(2);
double factor = 0.1;
const int l = 700;
// without compression
ushort[] pData = new ushort[l];
ulong[] tData = new ulong[l];
for (int i = 0; i < l; i++)
{
// calculate Sin-Wave
double sin = factor * (Math.Pow(2, DACResolution - 1) - 1.0) * Math.Sin(2.0 * i * Math.PI / l);
// calculate sign
pData[i] = sin >= 0 ? (ushort)sin : (ushort)((int)Math.Abs(sin) + (int)Math.Pow(2, DACResolution - 1));
tData[i] = 20; // duration in µs
}
device.SendChannelData(2, pData, tData);
}
// Data for Sync 0
{
device.ClearSyncData(0);
ushort[] pData = new ushort[1000];
ulong[] tData = new ulong[1000];
for (int i = 0; i < 1000; i++)
{
pData[i] = (ushort)(i & 1);
tData[i] = 20; // duration in µs
}
device.SendSyncData(0, pData, tData);
}
// Only meaningful for STG400x
device.SetVoltageMode();
// Start Trigger 1 and 2
device.SendStart(1 + 2); // Trigger 1 and 2
btStart.Enabled = false;
btStop.Enabled = true;
}