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Added the the get gain command #735

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merged 4 commits into from
Aug 2, 2024
Merged

Added the the get gain command #735

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d2fa13f
Added the the get gain command
Sarthak031 Aug 1, 2024
b3467e8
Modify the Handshaking packet size
Sarthak031 Aug 1, 2024
52ee274
Correct the Handsahaking condition
Sarthak031 Aug 1, 2024
4abe0d3
Solve the suggested changes
Sarthak031 Aug 2, 2024
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44 changes: 28 additions & 16 deletions src/board_controller/brainalive/brainalive.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -21,11 +21,12 @@ static void brainalive_adapter_1_on_scan_found (
static void brainalive_read_notifications (simpleble_uuid_t service,
simpleble_uuid_t characteristic, uint8_t *data, size_t size, void *board)
{
if (size == BrainAlive::brainalive_handshaking_packet_size)
if ((size == BrainAlive::brainalive_handshaking_packet_size) && (data[0] == START_BYTE) &&
(data[size - 1] == STOP_BYTE) && (data[2] == BrainAlive::brainalive_handshaking_command))
{
((BrainAlive *)(board))->setSoftwareGain (data[1]);
((BrainAlive *)(board))->setHardwareGain (data[2]);
((BrainAlive *)(board))->setReferenceVoltage (((data[3] << 8) | data[4]));
((BrainAlive *)(board))->set_internal_gain (data[3]);
((BrainAlive *)(board))->set_external_gain (data[4]);
((BrainAlive *)(board))->set_ref_Voltage (((data[5] << 8) | data[6]));
}
else
{
Expand Down Expand Up @@ -113,6 +114,7 @@ int BrainAlive::prepare_session ()
{
safe_logger (spdlog::level::info, "Connected to BrainAlive Device");
res = (int)BrainFlowExitCodes::STATUS_OK;

break;
}
else
Expand Down Expand Up @@ -190,6 +192,11 @@ int BrainAlive::prepare_session ()
if ((res == (int)BrainFlowExitCodes::STATUS_OK) && (control_characteristics_found))
{
initialized = true;
res = config_board ("0a036007000d");
if (res == (int)BrainFlowExitCodes::STATUS_OK)
safe_logger (spdlog::level::debug, "Get config command send");
else
safe_logger (spdlog::level::debug, "Failed to send get config command");
}
else
{
Expand All @@ -208,7 +215,7 @@ int BrainAlive::start_stream (int buffer_size, const char *streamer_params)

if (res == (int)BrainFlowExitCodes::STATUS_OK)
{
res = config_board ("0a8100000d");
res = config_board ("0a038100000d");
}
if (res == (int)BrainFlowExitCodes::STATUS_OK)
{
Expand All @@ -228,7 +235,7 @@ int BrainAlive::stop_stream ()
int res = (int)BrainFlowExitCodes::STATUS_OK;
if (is_streaming)
{
res = config_board ("0a4000000d");
res = config_board ("0a034000000d");
}
else
{
Expand Down Expand Up @@ -302,15 +309,20 @@ int BrainAlive::config_board (std::string config)
{
return (int)BrainFlowExitCodes::BOARD_NOT_CREATED_ERROR;
}
uint8_t command[5];
command[0] = 0x0a;
command[1] = 0x81; // it is hardcoded for now only
command[2] = 0x00;
command[3] = 0x00;
command[4] = 0x0d;
safe_logger (spdlog::level::trace, config[2]);
// Calculate the number of bytes
size_t num_bytes = config.length () / 2; // Each byte is represented by 2 hex characters
std::vector<uint8_t> byte_array (num_bytes);
// Convert hex string to byte array
for (size_t i = 0; i < num_bytes; ++i)
{
std::string byte_string = config.substr (i * 2, 2); // Get 2 characters for each byte
byte_array[i] =
static_cast<unsigned char> (std::stoul (byte_string, nullptr, 16)); // Convert to byte
}

if (simpleble_peripheral_write_command (brainalive_peripheral, write_characteristics.first,
write_characteristics.second, command, sizeof (command)) != SIMPLEBLE_SUCCESS)
write_characteristics.second, byte_array.data (),
sizeof (byte_array)) != SIMPLEBLE_SUCCESS)
{
safe_logger (spdlog::level::err, "failed to send command {} to device", config.c_str ());
return (int)BrainFlowExitCodes::BOARD_WRITE_ERROR;
Expand Down Expand Up @@ -394,8 +406,8 @@ void BrainAlive::read_data (simpleble_uuid_t service, simpleble_uuid_t character
{
package[eeg_channels[k]] =
(float)(((data[j] << 16 | data[j + 1] << 8 | data[j + 2]) << 8) >> 8) *
((((float)getReferenceVoltage () * 1000) /
(float)(getSoftwareGain () * getHardwareGain () * FSR_Value)));
((((float)get_ref_voltage () * 1000) /
(float)(get_internal_gain () * get_external_gain () * FSR_Value)));
}

for (int j = i + brainalive_axl_start_index, k = 0; j < i + brainalive_axl_end_index;
Expand Down
27 changes: 14 additions & 13 deletions src/board_controller/brainalive/inc/brainalive.h
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Original file line number Diff line number Diff line change
Expand Up @@ -10,8 +10,8 @@ class BrainAlive : public BLELibBoard
{

private:
int software_gain = 0;
int hardware_gain = 0;
int internal_gain = 0;
int external_gain = 0;
int reference_voltage = 0;

public:
Expand All @@ -28,32 +28,32 @@ class BrainAlive : public BLELibBoard
void adapter_1_on_scan_found (simpleble_adapter_t adapter, simpleble_peripheral_t peripheral);
void read_data (simpleble_uuid_t service, simpleble_uuid_t characteristic, uint8_t *data,
size_t size, int channel_num);
void setSoftwareGain (int gain)
void set_internal_gain (int gain)
{
software_gain = gain;
internal_gain = gain;
}

void setHardwareGain (int gain)
void set_external_gain (int gain)
{
hardware_gain = gain;
external_gain = gain;
}

void setReferenceVoltage (int voltage)
void set_ref_Voltage (int voltage)
{
reference_voltage = voltage;
}

int getSoftwareGain () const
int get_internal_gain () const
{
return software_gain;
return internal_gain;
}

int getHardwareGain () const
int get_external_gain () const
{
return hardware_gain;
return external_gain;
}

int getReferenceVoltage () const
int get_ref_voltage () const
{
return reference_voltage;
}
Expand Down Expand Up @@ -81,7 +81,8 @@ class BrainAlive : public BLELibBoard
static constexpr int FSR_Value = 8388607;
static constexpr int ba_brainflow_package_size = 17;

static constexpr int brainalive_handshaking_packet_size = 6;
static constexpr int brainalive_handshaking_packet_size = 8;
static constexpr int brainalive_handshaking_command = 7;


protected:
Expand Down
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