A channel configuration structure, which defines the channel meaning when a channel number is passed into a RAIL function, e.g., RAIL_StartTx() and RAIL_StartRx().

A RAIL_ChannelConfig_t structure defines the channel scheme that an application uses when registered in RAIL_ConfigChannels().

These are a few examples of different channel configurations:

// 21 channels starting at 2.45 GHz with channel spacing of 1 MHz
// ... generated by Simplicity Studio (i.e., rail_config.c) ...
const uint32_t generated[] = { ... };
RAIL_ChannelConfigEntryAttr_t generated_entryAttr = { ... };
const RAIL_ChannelConfigEntry_t generated_channels[] = {
  {
    .phyConfigDeltaAdd = NULL, // Add this to default configuration for this entry
    .baseFrequency = 2450000000,
    .channelSpacing = 1000000,
    .physicalChannelOffset = 0,
    .channelNumberStart = 0,
    .channelNumberEnd = 20,
    .maxPower = RAIL_TX_POWER_MAX,
    .attr = &generated_entryAttr
  },
};
const RAIL_ChannelConfig_t generated_channelConfig = {
  .phyConfigBase = generated, // Default radio configuration for all entries
  .phyConfigDeltaSubtract = NULL, // Subtract this to restore the default configuration
  .configs = generated_channels,
  .length = 1 // There are this many channel configuration entries
};
const RAIL_ChannelConfig_t *channelConfigs[] = {
  &generated_channelConfig,
  NULL
};
// ... in main code ...
// Associate a specific channel configuration with a particular RAIL instance.
RAIL_ConfigChannels(railHandle, channelConfigs[0]);

// 4 nonlinear channels
// ... in rail_config.c ...
const uint32_t generated[] = { ... };
RAIL_ChannelConfigEntryAttr_t generated_entryAttr = { ... };
const RAIL_ChannelConfigEntry_t generated_channels[] = {
  {
    .phyConfigDeltaAdd = NULL, // Add this to default configuration for this entry
    .baseFrequency = 910123456,
    .channelSpacing = 0,
    .physicalChannelOffset = 0,
    .channelNumberStart = 0,
    .channelNumberEnd = 0,
    .maxPower = RAIL_TX_POWER_MAX,
    .attr = &generated_entryAttr
  },
  {
    .phyConfigDeltaAdd = NULL,
    .baseFrequency = 911654789,
    .channelSpacing = 0,
    .physicalChannelOffset = 0, // Since ch spacing = 0, offset can be 0
    .channelNumberStart = 1,
    .channelNumberEnd = 1,
    .maxPower = RAIL_TX_POWER_MAX,
    .attr = &generated_entryAttr
  },
  {
    .phyConfigDeltaAdd = NULL,
    .baseFrequency = 912321456,
    .channelSpacing = 100000,
    .physicalChannelOffset = 2, // Since ch spacing != 0, offset = 2
    .channelNumberStart = 2, // ch 2 = baseFrequency
    .channelNumberEnd = 2,
    .maxPower = RAIL_TX_POWER_MAX,
    .attr = &generated_entryAttr
  },
  {
    .phyConfigDeltaAdd = NULL,
    .baseFrequency = 913147852,
    .channelSpacing = 0,
    .physicalChannelOffset = 0,
    .channelNumberStart = 3,
    .channelNumberEnd = 3,
    .maxPower = RAIL_TX_POWER_MAX,
    .attr = &generated_entryAttr
  },
};
const RAIL_ChannelConfig_t generated_channelConfig = {
  .phyConfigBase = generated, // Default radio configuration for all entries
  .phyConfigDeltaSubtract = NULL, // Subtract this to restore the default configuration
  .configs = generated_channels,
  .length = 4 // There are this many channel configuration entries
};
const RAIL_ChannelConfig_t *channelConfigs[] = {
  &generated_channelConfig,
  NULL
};
// ... in main code ...
// Associate a specific channel configuration with a particular RAIL instance.
RAIL_ConfigChannels(railHandle, channelConfigs[0]);

// Multiple radio configurations
// ... in rail_config.c ...
const uint32_t generated0[] = { ... };
RAIL_ChannelConfigEntryAttr_t generated0_entryAttr = { ... };
const RAIL_ChannelConfigEntry_t generated0_channels[] = {
  {
    .phyConfigDeltaAdd = NULL, // Add this to the default configuration for this entry
    .baseFrequency = 2450000000,
    .channelSpacing = 1000000,
    .physicalChannelOffset = 0,
    .channelNumberStart = 0,
    .channelNumberEnd = 20,
    .maxPower = RAIL_TX_POWER_MAX,
    .attr = &generated0_entryAttr
  },
};
const RAIL_ChannelConfig_t generated0_channelConfig = {
  .phyConfigBase = generated0, // Default radio configuration for all entries
  .phyConfigDeltaSubtract = NULL, // Subtract this to restore default configuration
  .configs = generated0_channels,
  .length = 1 // There are this many channel configuration entries
};
const uint32_t generated1[] = { ... };
RAIL_ChannelConfigEntryAttr_t generated1_entryAttr = { ... };
const RAIL_ChannelConfigEntry_t generated1_channels[] = {
  {
    .phyConfigDeltaAdd = NULL,
    .baseFrequency = 2450000000,
    .channelSpacing = 1000000,
    .physicalChannelOffset = 0,
    .channelNumberStart = 0,
    .channelNumberEnd = 20,
    .maxPower = -100, // Use this entry when TX power <= -10dBm
    .attr = &generated1_entryAttr
  },
  {
    .phyConfigDeltaAdd = NULL,
    .baseFrequency = 2450000000,
    .channelSpacing = 1000000,
    .physicalChannelOffset = 0,
    .channelNumberStart = 0,
    .channelNumberEnd = 20,
    .maxPower = 15, // Use this entry when TX power > -10dBm
                    // and TX power <= 1.5dBm
    .attr = &generated1_entryAttr
  },
  {
    .phyConfigDeltaAdd = NULL,
    .baseFrequency = 2450000000,
    .channelSpacing = 1000000,
    .physicalChannelOffset = 0,
    .channelNumberStart = 0,
    .channelNumberEnd = 20,
    .maxPower = RAIL_TX_POWER_MAX, // Use this entry when TX power > 1.5dBm
    .attr = &generated1_entryAttr
  },
};
const RAIL_ChannelConfig_t generated1_channelConfig = {
  .phyConfigBase = generated1,
  .phyConfigDeltaSubtract = NULL,
  .configs = generated1_channels,
  .length = 3
};
const uint32_t generated2[] = { ... };
RAIL_ChannelConfigEntryAttr_t generated2_entryAttr = { ... };
const RAIL_ChannelConfigEntry_t generated2_channels[] = {
  {
    .phyConfigDeltaAdd = NULL,
    .baseFrequency = 2450000000,
    .channelSpacing = 1000000,
    .physicalChannelOffset = 0,
    .channelNumberStart = 0,
    .channelNumberEnd = 20,
    .maxPower = RAIL_TX_POWER_MAX,
    .attr = &generated2_entryAttr
  },
};
const RAIL_ChannelConfig_t generated2_channelConfig = {
  .phyConfigBase = generated2,
  .phyConfigDeltaSubtract = NULL,
  .configs = generated2_channels,
  .length = 1
};
const RAIL_ChannelConfig_t *channelConfigs[] = {
  &generated0_channelConfig,
  &generated1_channelConfig,
  &generated2_channelConfig,
  NULL
};
// ... in main code ...
// Create a unique RAIL handle for each unique channel configuration.
railHandle0 = RAIL_Init(&railCfg0, &RAILCb_RfReady0);
railHandle1 = RAIL_Init(&railCfg1, &RAILCb_RfReady1);
railHandle2 = RAIL_Init(&railCfg2, &RAILCb_RfReady2);
// Associate each channel configuration with its corresponding RAIL handle.
RAIL_ConfigChannels(railHandle0, channelConfigs[0]);
RAIL_ConfigChannels(railHandle1, channelConfigs[1]);
RAIL_ConfigChannels(railHandle2, channelConfigs[2]);
// Use a RAIL handle and channel to access the desired channel configuration entry.
RAIL_SetTxPowerDbm(railHandle1, 100); // set 10.0 dBm TX power
RAIL_StartRx(railHandle1, 0, &schedInfo); // RX using generated1_channels[2]
RAIL_SetTxPowerDbm(railHandle1, 0); // set 0 dBm TX power
RAIL_StartRx(railHandle1, 0, &schedInfo); // RX using generated1_channels[1]
RAIL_StartRx(railHandle2, 0, &schedInfo); // RX using generated2_channels[0]