CMSIS-Driver
Version 2.8.0
Peripheral Interface for Middleware and Application Code
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Driver API for Ethernet MAC Peripheral (Driver_ETH_MAC.h) More...
Content | |
Ethernet MAC Events | |
The Ethernet MAC driver generates call back events that are notified via the function ARM_ETH_MAC_SignalEvent. | |
Ethernet MAC Control Codes | |
Configure and control the Ethernet MAC using the ARM_ETH_MAC_Control. | |
Ethernet MAC Timer Control Codes | |
Control codes for ARM_ETH_MAC_ControlTimer function. | |
Ethernet MAC Frame Transmit Flags | |
Specify frame transmit flags. | |
Data Structures | |
struct | ARM_ETH_MAC_CAPABILITIES |
Ethernet MAC Capabilities. More... | |
struct | ARM_DRIVER_ETH_MAC |
Access structure of the Ethernet MAC Driver. More... | |
struct | ARM_ETH_MAC_TIME |
Ethernet MAC Time. More... | |
Typedefs | |
typedef void(* | ARM_ETH_MAC_SignalEvent_t )(uint32_t event) |
Pointer to ARM_ETH_MAC_SignalEvent : Signal Ethernet Event. More... | |
Functions | |
ARM_DRIVER_VERSION | ARM_ETH_MAC_GetVersion (void) |
Get driver version. More... | |
ARM_ETH_MAC_CAPABILITIES | ARM_ETH_MAC_GetCapabilities (void) |
Get driver capabilities. More... | |
int32_t | ARM_ETH_MAC_Initialize (ARM_ETH_MAC_SignalEvent_t cb_event) |
Initialize Ethernet MAC Device. More... | |
int32_t | ARM_ETH_MAC_Uninitialize (void) |
De-initialize Ethernet MAC Device. More... | |
int32_t | ARM_ETH_MAC_PowerControl (ARM_POWER_STATE state) |
Control Ethernet MAC Device Power. More... | |
int32_t | ARM_ETH_MAC_GetMacAddress (ARM_ETH_MAC_ADDR *ptr_addr) |
Get Ethernet MAC Address. More... | |
int32_t | ARM_ETH_MAC_SetMacAddress (const ARM_ETH_MAC_ADDR *ptr_addr) |
Set Ethernet MAC Address. More... | |
int32_t | ARM_ETH_MAC_SetAddressFilter (const ARM_ETH_MAC_ADDR *ptr_addr, uint32_t num_addr) |
Configure Address Filter. More... | |
int32_t | ARM_ETH_MAC_SendFrame (const uint8_t *frame, uint32_t len, uint32_t flags) |
Send Ethernet frame. More... | |
int32_t | ARM_ETH_MAC_ReadFrame (uint8_t *frame, uint32_t len) |
Read data of received Ethernet frame. More... | |
uint32_t | ARM_ETH_MAC_GetRxFrameSize (void) |
Get size of received Ethernet frame. More... | |
int32_t | ARM_ETH_MAC_GetRxFrameTime (ARM_ETH_MAC_TIME *time) |
Get time of received Ethernet frame. More... | |
int32_t | ARM_ETH_MAC_GetTxFrameTime (ARM_ETH_MAC_TIME *time) |
Get time of transmitted Ethernet frame. More... | |
int32_t | ARM_ETH_MAC_Control (uint32_t control, uint32_t arg) |
Control Ethernet Interface. More... | |
int32_t | ARM_ETH_MAC_ControlTimer (uint32_t control, ARM_ETH_MAC_TIME *time) |
Control Precision Timer. More... | |
int32_t | ARM_ETH_MAC_PHY_Read (uint8_t phy_addr, uint8_t reg_addr, uint16_t *data) |
Read Ethernet PHY Register through Management Interface. More... | |
int32_t | ARM_ETH_MAC_PHY_Write (uint8_t phy_addr, uint8_t reg_addr, uint16_t data) |
Write Ethernet PHY Register through Management Interface. More... | |
void | ARM_ETH_MAC_SignalEvent (uint32_t event) |
Callback function that signals a Ethernet Event. More... | |
Driver API for Ethernet MAC Peripheral (Driver_ETH_MAC.h)
The following section describes the Ethernet MAC Interface as defined in the Driver_ETH_MAC.h header file.
struct ARM_ETH_MAC_CAPABILITIES |
Ethernet MAC Capabilities.
An Ethernet MAC driver can be implemented with different capabilities. The data fields of this struct encode the capabilities implemented by this driver.
Returned by:
Data Fields | ||
---|---|---|
uint32_t | checksum_offload_rx_ip4: 1 | 1 = IPv4 header checksum verified on receive |
uint32_t | checksum_offload_rx_ip6: 1 | 1 = IPv6 checksum verification supported on receive |
uint32_t | checksum_offload_rx_udp: 1 | 1 = UDP payload checksum verified on receive |
uint32_t | checksum_offload_rx_tcp: 1 | 1 = TCP payload checksum verified on receive |
uint32_t | checksum_offload_rx_icmp: 1 | 1 = ICMP payload checksum verified on receive |
uint32_t | checksum_offload_tx_ip4: 1 | 1 = IPv4 header checksum generated on transmit |
uint32_t | checksum_offload_tx_ip6: 1 | 1 = IPv6 checksum generation supported on transmit |
uint32_t | checksum_offload_tx_udp: 1 | 1 = UDP payload checksum generated on transmit |
uint32_t | checksum_offload_tx_tcp: 1 | 1 = TCP payload checksum generated on transmit |
uint32_t | checksum_offload_tx_icmp: 1 | 1 = ICMP payload checksum generated on transmit |
uint32_t | media_interface: 2 | Ethernet Media Interface type. |
uint32_t | mac_address: 1 | 1 = driver provides initial valid MAC address |
uint32_t | event_rx_frame: 1 | 1 = callback event ARM_ETH_MAC_EVENT_RX_FRAME generated |
uint32_t | event_tx_frame: 1 | 1 = callback event ARM_ETH_MAC_EVENT_TX_FRAME generated |
uint32_t | event_wakeup: 1 | 1 = wakeup event ARM_ETH_MAC_EVENT_WAKEUP generated |
uint32_t | precision_timer: 1 | 1 = Precision Timer supported |
uint32_t | reserved: 15 | Reserved (must be zero) |
struct ARM_DRIVER_ETH_MAC |
Access structure of the Ethernet MAC Driver.
The functions of the Ethernet MAC are accessed by function pointers. Refer to Common Driver Functions for overview information.
Each instance of an Ethernet MAC provides such an access struct. The instance is indicated by a postfix in the symbol name of the access struct, for example:
A configuration setting in the middleware allows connecting the middleware to a specific driver instance Driver_ETH_MACn. The default is 0, which connects a middleware to the first instance of a driver.
Data Fields | |
ARM_DRIVER_VERSION(* | GetVersion )(void) |
Pointer to ARM_ETH_MAC_GetVersion : Get driver version. More... | |
ARM_ETH_MAC_CAPABILITIES(* | GetCapabilities )(void) |
Pointer to ARM_ETH_MAC_GetCapabilities : Get driver capabilities. More... | |
int32_t(* | Initialize )(ARM_ETH_MAC_SignalEvent_t cb_event) |
Pointer to ARM_ETH_MAC_Initialize : Initialize Ethernet MAC Device. More... | |
int32_t(* | Uninitialize )(void) |
Pointer to ARM_ETH_MAC_Uninitialize : De-initialize Ethernet MAC Device. More... | |
int32_t(* | PowerControl )(ARM_POWER_STATE state) |
Pointer to ARM_ETH_MAC_PowerControl : Control Ethernet MAC Device Power. More... | |
int32_t(* | GetMacAddress )(ARM_ETH_MAC_ADDR *ptr_addr) |
Pointer to ARM_ETH_MAC_GetMacAddress : Get Ethernet MAC Address. More... | |
int32_t(* | SetMacAddress )(const ARM_ETH_MAC_ADDR *ptr_addr) |
Pointer to ARM_ETH_MAC_SetMacAddress : Set Ethernet MAC Address. More... | |
int32_t(* | SetAddressFilter )(const ARM_ETH_MAC_ADDR *ptr_addr, uint32_t num_addr) |
Pointer to ARM_ETH_MAC_SetAddressFilter : Configure Address Filter. More... | |
int32_t(* | SendFrame )(const uint8_t *frame, uint32_t len, uint32_t flags) |
Pointer to ARM_ETH_MAC_SendFrame : Send Ethernet frame. More... | |
int32_t(* | ReadFrame )(uint8_t *frame, uint32_t len) |
Pointer to ARM_ETH_MAC_ReadFrame : Read data of received Ethernet frame. More... | |
uint32_t(* | GetRxFrameSize )(void) |
Pointer to ARM_ETH_MAC_GetRxFrameSize : Get size of received Ethernet frame. More... | |
int32_t(* | GetRxFrameTime )(ARM_ETH_MAC_TIME *time) |
Pointer to ARM_ETH_MAC_GetRxFrameTime : Get time of received Ethernet frame. More... | |
int32_t(* | GetTxFrameTime )(ARM_ETH_MAC_TIME *time) |
Pointer to ARM_ETH_MAC_GetTxFrameTime : Get time of transmitted Ethernet frame. More... | |
int32_t(* | ControlTimer )(uint32_t control, ARM_ETH_MAC_TIME *time) |
Pointer to ARM_ETH_MAC_ControlTimer : Control Precision Timer. More... | |
int32_t(* | Control )(uint32_t control, uint32_t arg) |
Pointer to ARM_ETH_MAC_Control : Control Ethernet Interface. More... | |
int32_t(* | PHY_Read )(uint8_t phy_addr, uint8_t reg_addr, uint16_t *data) |
Pointer to ARM_ETH_MAC_PHY_Read : Read Ethernet PHY Register through Management Interface. More... | |
int32_t(* | PHY_Write )(uint8_t phy_addr, uint8_t reg_addr, uint16_t data) |
Pointer to ARM_ETH_MAC_PHY_Write : Write Ethernet PHY Register through Management Interface. More... | |
ARM_DRIVER_VERSION(* GetVersion)(void) |
Pointer to ARM_ETH_MAC_GetVersion : Get driver version.
ARM_ETH_MAC_CAPABILITIES(* GetCapabilities)(void) |
Pointer to ARM_ETH_MAC_GetCapabilities : Get driver capabilities.
int32_t(* Initialize)(ARM_ETH_MAC_SignalEvent_t cb_event) |
Pointer to ARM_ETH_MAC_Initialize : Initialize Ethernet MAC Device.
int32_t(* Uninitialize)(void) |
Pointer to ARM_ETH_MAC_Uninitialize : De-initialize Ethernet MAC Device.
int32_t(* PowerControl)(ARM_POWER_STATE state) |
Pointer to ARM_ETH_MAC_PowerControl : Control Ethernet MAC Device Power.
int32_t(* GetMacAddress)(ARM_ETH_MAC_ADDR *ptr_addr) |
Pointer to ARM_ETH_MAC_GetMacAddress : Get Ethernet MAC Address.
int32_t(* SetMacAddress)(const ARM_ETH_MAC_ADDR *ptr_addr) |
Pointer to ARM_ETH_MAC_SetMacAddress : Set Ethernet MAC Address.
int32_t(* SetAddressFilter)(const ARM_ETH_MAC_ADDR *ptr_addr, uint32_t num_addr) |
Pointer to ARM_ETH_MAC_SetAddressFilter : Configure Address Filter.
int32_t(* SendFrame)(const uint8_t *frame, uint32_t len, uint32_t flags) |
Pointer to ARM_ETH_MAC_SendFrame : Send Ethernet frame.
int32_t(* ReadFrame)(uint8_t *frame, uint32_t len) |
Pointer to ARM_ETH_MAC_ReadFrame : Read data of received Ethernet frame.
uint32_t(* GetRxFrameSize)(void) |
Pointer to ARM_ETH_MAC_GetRxFrameSize : Get size of received Ethernet frame.
int32_t(* GetRxFrameTime)(ARM_ETH_MAC_TIME *time) |
Pointer to ARM_ETH_MAC_GetRxFrameTime : Get time of received Ethernet frame.
int32_t(* GetTxFrameTime)(ARM_ETH_MAC_TIME *time) |
Pointer to ARM_ETH_MAC_GetTxFrameTime : Get time of transmitted Ethernet frame.
int32_t(* ControlTimer)(uint32_t control, ARM_ETH_MAC_TIME *time) |
Pointer to ARM_ETH_MAC_ControlTimer : Control Precision Timer.
int32_t(* Control)(uint32_t control, uint32_t arg) |
Pointer to ARM_ETH_MAC_Control : Control Ethernet Interface.
int32_t(* PHY_Read)(uint8_t phy_addr, uint8_t reg_addr, uint16_t *data) |
Pointer to ARM_ETH_MAC_PHY_Read : Read Ethernet PHY Register through Management Interface.
int32_t(* PHY_Write)(uint8_t phy_addr, uint8_t reg_addr, uint16_t data) |
Pointer to ARM_ETH_MAC_PHY_Write : Write Ethernet PHY Register through Management Interface.
struct ARM_ETH_MAC_TIME |
Ethernet MAC Time.
The two members of this struct provide fields to encode time values in the order Nano seconds and seconds.
The member ns is also used as a correction factor for ARM_ETH_MAC_TIMER_ADJUST_CLOCK.
Used in:
Data Fields | ||
---|---|---|
uint32_t | ns | Nano seconds. |
uint32_t | sec | Seconds. |
ARM_ETH_MAC_SignalEvent_t |
Pointer to ARM_ETH_MAC_SignalEvent : Signal Ethernet Event.
Provides the typedef for the callback function ARM_ETH_MAC_SignalEvent.
Parameter for:
ARM_DRIVER_VERSION ARM_ETH_MAC_GetVersion | ( | void | ) |
Get driver version.
The function ARM_ETH_MAC_GetVersion returns version information of the driver implementation in ARM_DRIVER_VERSION
Example:
ARM_ETH_MAC_CAPABILITIES ARM_ETH_MAC_GetCapabilities | ( | void | ) |
Get driver capabilities.
The function ARM_ETH_MAC_GetCapabilities retrieves information about capabilities in this driver implementation. The data fields of the struct ARM_ETH_MAC_CAPABILITIES encode various capabilities, for example if a hardware is capable to create checksums in hardware or signal events using the ARM_ETH_MAC_SignalEvent callback function.
Example:
int32_t ARM_ETH_MAC_Initialize | ( | ARM_ETH_MAC_SignalEvent_t | cb_event | ) |
Initialize Ethernet MAC Device.
[in] | cb_event | Pointer to ARM_ETH_MAC_SignalEvent |
The function ARM_ETH_MAC_Initialize initializes the Ethernet MAC interface. It is called when the middleware component starts operation.
The ARM_ETH_MAC_Initialize function performs the following operations:
The parameter cb_event is a pointer to the ARM_ETH_MAC_SignalEvent callback function; use a NULL pointer when no callback signals are required.
Example:
int32_t ARM_ETH_MAC_Uninitialize | ( | void | ) |
De-initialize Ethernet MAC Device.
The function ARM_ETH_MAC_Uninitialize de-initializes the resources of Ethernet MAC interface.
It is called when the middleware component stops operation and releases the software resources used by the interface.
int32_t ARM_ETH_MAC_PowerControl | ( | ARM_POWER_STATE | state | ) |
Control Ethernet MAC Device Power.
[in] | state | Power state |
The function ARM_ETH_MAC_PowerControl allows you to configure the power modes of the Ethernet MAC interface.
The parameter state can be:
If power state specifies an unsupported mode, the function returns ARM_DRIVER_ERROR_UNSUPPORTED as status information and the previous power state of the peripheral is unchanged. Multiple calls with the same state generate no error.
Example:
int32_t ARM_ETH_MAC_GetMacAddress | ( | ARM_ETH_MAC_ADDR * | ptr_addr | ) |
Get Ethernet MAC Address.
[in] | ptr_addr | Pointer to address |
The function ARM_ETH_MAC_GetMacAddress retrieves the Ethernet MAC own address from the driver.
int32_t ARM_ETH_MAC_SetMacAddress | ( | const ARM_ETH_MAC_ADDR * | ptr_addr | ) |
Set Ethernet MAC Address.
[in] | ptr_addr | Pointer to address |
The function ARM_ETH_MAC_SetMacAddress configures Ethernet MAC own address. The Ethernet MAC accepts packets Ethernet frames which contains a MAC destination address that matches the address specified with ptr_addr.
The Ethernet MAC receiver will accept also packets with addresses configured by ARM_ETH_MAC_SetAddressFilter function.
MAC receiver can be configured to accept also packets with broadcast address, any multicast address or even all packets regardless of address (Promiscuity Mode). This is configured by function ARM_ETH_MAC_Control with ARM_ETH_MAC_CONFIGURE as control parameter.
int32_t ARM_ETH_MAC_SetAddressFilter | ( | const ARM_ETH_MAC_ADDR * | ptr_addr, |
uint32_t | num_addr | ||
) |
Configure Address Filter.
[in] | ptr_addr | Pointer to addresses |
[in] | num_addr | Number of addresses to configure |
The function ARM_ETH_MAC_SetAddressFilter configures Ethernet MAC receiver address filtering. The Ethernet MAC accepts packets Ethernet frames which contains a MAC destination address of the list supplied with ptr_addr. The parameter ptr_addr provides and array of Ethernet MAC addresses. The number of addresses is supplied by num_addr. Specifying num_adr = 0 disables address filtering previously set with this function.
The Ethernet MAC receiver will accept packets addressed to its own address and packets with addresses configured by this function.
MAC receiver can be configured to accept also packets with broadcast address, any multicast address or even all packets regardless of address (Promiscuity Mode). This is configured by function ARM_ETH_MAC_Control with ARM_ETH_MAC_CONFIGURE as control parameter.
int32_t ARM_ETH_MAC_SendFrame | ( | const uint8_t * | frame, |
uint32_t | len, | ||
uint32_t | flags | ||
) |
Send Ethernet frame.
[in] | frame | Pointer to frame buffer with data to send |
[in] | len | Frame buffer length in bytes |
[in] | flags | Frame transmit flags (see ARM_ETH_MAC_TX_FRAME_...) |
The function ARM_ETH_MAC_SendFrame writes an Ethernet frame to the Ethernet MAC transmit buffer.
The Ethernet MAC transmit engine must be enabled by using the function ARM_ETH_MAC_Control (ARM_ETH_MAC_CONTROL_TX, 1) before a call to this function.
The frame data addressed by buf starts with MAC destination and ends with the last Payload data byte. The frame data is copied into the transmit buffer of the Ethernet MAC interface. The function does not wait until the transmission over the Ethernet is complete, however the memory addressed by buf is available for the next Ethernet frame after return.
The maximum value for len is implied by the size restrictions of the Ethernet frame but is not verified. Using an invalid value for len may generate unpredicted results.
The parameter flags specifies additional attributes for the function as shown in the following table. Multiple flags can be combined, for example: ARM_ETH_MAC_TX_FRAME_EVENT | ARM_ETH_MAC_TX_FRAME_TIMESTAMP.
Flag bit | Description |
---|---|
ARM_ETH_MAC_TX_FRAME_FRAGMENT | Indicates that it is a fragment of the frame. allows you to collect multiple fragments before the frame is sent. |
ARM_ETH_MAC_TX_FRAME_EVENT | ARM_ETH_MAC_SignalEvent with event bit ARM_ETH_MAC_EVENT_TX_FRAME set will be called when frame send is complete. |
ARM_ETH_MAC_TX_FRAME_TIMESTAMP | Capture the time stamp of the frame. The time stamp can be obtained using the function ARM_ETH_MAC_GetTxFrameTime. |
Example:
int32_t ARM_ETH_MAC_ReadFrame | ( | uint8_t * | frame, |
uint32_t | len | ||
) |
Read data of received Ethernet frame.
[in] | frame | Pointer to frame buffer for data to read into |
[in] | len | Frame buffer length in bytes |
The function ARM_ETH_MAC_ReadFrame reads an Ethernet frame from the Ethernet MAC receive buffer.
The Ethernet MAC receive engine must be enabled using the function ARM_ETH_MAC_Control (ARM_ETH_MAC_CONTROL_RX , 1) before a call to this function. The len of the Ethernet frame can be checked using the function ARM_ETH_MAC_GetRxFrameSize.
The frame data addressed by buf starts with MAC destination and ends with the last Payload data byte. The frame data is read from the receive buffer of the Ethernet MAC interface and the number of bytes written into the memory addressed by buf is returned. A negative return value indicates an error whereby the status code is defined with driver common return codes.
The function ARM_ETH_MAC_ReadFrame may be called with buf = NULL and len = 0 to discard or release an frame. This is useful when an incorrect frame has been received or no memory is available to hold the Ethernet frame.
Example:
uint32_t ARM_ETH_MAC_GetRxFrameSize | ( | void | ) |
Get size of received Ethernet frame.
The function ARM_ETH_MAC_GetRxFrameSize returns the size of a received Ethernet frame. This function is called before ARM_ETH_MAC_ReadFrame and supplies the value len.
The frame size includes MAC destination and ends with the last Payload data byte. Value 0 indicates that no Ethernet frame is available in the receive buffer. Values smaller than minimum size of Ethernet frame or larger than maximum size of Ethernet frame indicate an invalid frame which needs to be discarded by calling ARM_ETH_MAC_ReadFrame.
Example:
int32_t ARM_ETH_MAC_GetRxFrameTime | ( | ARM_ETH_MAC_TIME * | time | ) |
Get time of received Ethernet frame.
[in] | time | Pointer to time structure for data to read into |
Retrieve time stamp of a received Ethernet frame. This function must be called before the frame is read using ARM_ETH_MAC_ReadFrame.
int32_t ARM_ETH_MAC_GetTxFrameTime | ( | ARM_ETH_MAC_TIME * | time | ) |
Get time of transmitted Ethernet frame.
[in] | time | Pointer to time structure for data to read into |
The function returns the time stamp of a transmitted Ethernet frame.
int32_t ARM_ETH_MAC_Control | ( | uint32_t | control, |
uint32_t | arg | ||
) |
Control Ethernet Interface.
[in] | control | Operation |
[in] | arg | Argument of operation (optional) |
The function ARM_ETH_MAC_Control controls the Ethernet MAC interface and executes various operations. After initialization, the Ethernet transceiver and receiver are disabled.
The parameter control specifies an operation as defined in the table Parameter control.
The parameter arg provides, depending on the operation, additional information or values.
The table lists values for the parameter control.
Parameter control | Operation |
---|---|
ARM_ETH_MAC_CONFIGURE | Configure the Ethernet MAC interface; For arg values, see table Parameter arg for CONFIGURE |
ARM_ETH_MAC_CONTROL_TX | Enable or disable the transmitter; arg : 0=disable; 1=enable |
ARM_ETH_MAC_CONTROL_RX | Enable or disable the receiver; arg : 0=disable; 1=enable |
ARM_ETH_MAC_FLUSH | Flush a buffer; arg : see table Parameter arg for FLUSH |
ARM_ETH_MAC_SLEEP | Exit/Enter Sleep mode; arg : 0=exit; 1=enter and wait for Magic packet |
ARM_ETH_MAC_VLAN_FILTER | Configure VLAN Filter for received frames; arg : See table Parameter arg for VLAN Filter |
The table Parameter arg for CONFIGURE lists the arg values for the control ARM_ETH_MAC_CONFIGURE. The values can be ORed in the following way:
Parameter arg CONFIGURE | |||
---|---|---|---|
Parameter arg | Bit | Category | Description |
ARM_ETH_MAC_SPEED_10M | 0..1 | Link Speed | Set the link speed to 10 [Mbps] |
ARM_ETH_MAC_SPEED_100M | Set the link speed to 100 [Mbps] | ||
ARM_ETH_MAC_SPEED_1G | Set the link speed to 1 [Gbps] | ||
ARM_ETH_MAC_DUPLEX_HALF | 2 | Link Mode | Set the link mode to half duplex |
ARM_ETH_MAC_DUPLEX_FULL | Set the link mode to full duplex | ||
n.a. | 3 | n.a. | reserved |
ARM_ETH_MAC_LOOPBACK | 4 | Loopback Test Mode | Set the interface into a Loop-back test mode |
ARM_ETH_MAC_CHECKSUM_OFFLOAD_RX | 5 | Receiver Checksum offload | Enable Receiver Checksum offload |
ARM_ETH_MAC_CHECKSUM_OFFLOAD_TX | 6 | Transmitter Checksum offload | Enable Transmitter Checksum offload |
ARM_ETH_MAC_ADDRESS_BROADCAST | 7 | Broadcast Frame address | Accept frames with Broadcast address |
ARM_ETH_MAC_ADDRESS_MULTICAST | 8 | Multicast Frame address | Accept frames with any Multicast address |
ARM_ETH_MAC_ADDRESS_ALL | 9 | Any Frame address | Accept frames with any address (Promiscuous Mode) |
The table Parameter arg for FLUSH lists the arg values for the control ARM_ETH_MAC_FLUSH. The arg values can be ORed.
Parameter arg for FLUSH | |||
---|---|---|---|
Parameter arg | Bit | Category | Description |
ARM_ETH_MAC_FLUSH_RX | 1 | Receive buffer | Flush the Receive buffer |
ARM_ETH_MAC_FLUSH_TX | 2 | Transmit buffer | Flush the Transmit buffer |
The table Parameter arg for VLAN Filter lists the arg values for the control ARM_ETH_MAC_VLAN_FILTER. The arg values can be ORed.
Parameter arg for VLAN Filter | |||
---|---|---|---|
Parameter arg | Bit | Category | Description |
value | 0..15 | VLAN Tag | Set VLAN Tag value |
0 | 16 | Use of VLAN | Compare the complete 16-bit VLAN Tag value |
ARM_ETH_MAC_VLAN_FILTER_ID_ONLY | Compare only the 12-bit VLAN Identifier | ||
0 | 0..16 | Disable | Disable the VLAN Filter |
Example:
For a complete example, refer to Ethernet Interface - Driver Functions.
int32_t ARM_ETH_MAC_ControlTimer | ( | uint32_t | control, |
ARM_ETH_MAC_TIME * | time | ||
) |
Control Precision Timer.
[in] | control | Operation |
[in] | time | Pointer to time structure |
The function ARM_ETH_MAC_ControlTimer controls the timer required for PTP (Precision Time Protocol).
The parameter control receives ARM_ETH_MAC_TIMER_xxx codes to manage the timer for a PTP enabled Ethernet MAC interface.
The parameter time is pointer to a structure that holds time information.
Mode Parameters: Timer Controls | Description |
---|---|
ARM_ETH_MAC_TIMER_GET_TIME | Retrieve the current time and update the content ARM_ETH_MAC_TIME *time. |
ARM_ETH_MAC_TIMER_SET_TIME | Set the new time using the values provided with ARM_ETH_MAC_TIME *time. |
ARM_ETH_MAC_TIMER_INC_TIME | Increment the current time by using the values provided with ARM_ETH_MAC_TIME *time. |
ARM_ETH_MAC_TIMER_DEC_TIME | Decrement the current time by using the values provided with ARM_ETH_MAC_TIME *time. |
ARM_ETH_MAC_TIMER_SET_ALARM | Set the alarm time to the values provided with ARM_ETH_MAC_TIME *time. |
ARM_ETH_MAC_TIMER_ADJUST_CLOCK | Set the clock frequency; the value in time->ns is the correction factor in fractional format q31. |
int32_t ARM_ETH_MAC_PHY_Read | ( | uint8_t | phy_addr, |
uint8_t | reg_addr, | ||
uint16_t * | data | ||
) |
Read Ethernet PHY Register through Management Interface.
[in] | phy_addr | 5-bit device address |
[in] | reg_addr | 5-bit register address |
[out] | data | Pointer where the result is written to |
Read Ethernet PHY Register through the Management Interface. The function is passed to ARM_ETH_PHY_Initialize. The Ethernet PHY driver uses this function to read the value of PHY registers.
Example:
int32_t ARM_ETH_MAC_PHY_Write | ( | uint8_t | phy_addr, |
uint8_t | reg_addr, | ||
uint16_t | data | ||
) |
Write Ethernet PHY Register through Management Interface.
[in] | phy_addr | 5-bit device address |
[in] | reg_addr | 5-bit register address |
[in] | data | 16-bit data to write |
The function ARM_ETH_MAC_PHY_Write writes to a Ethernet PHY register through the Management Interface. The function is passed to ARM_ETH_PHY_Initialize. The Ethernet PHY driver uses this function to write data to PHY registers.
Example:
void ARM_ETH_MAC_SignalEvent | ( | uint32_t | event | ) |
Callback function that signals a Ethernet Event.
[in] | event | event notification mask |
The function ARM_ETH_MAC_SignalEvent is a callback function registered by the function ARM_ETH_MAC_Initialize. This function is typically called from interrupt service routines (ISR) to indicate that a frame is processed or a special event occurred.
The parameter event indicates one or more events that occurred during driver operation. Each event is encoded in a separate bit and therefore it is possible to signal multiple events within the same call.
Not every event is necessarily generated by the driver. This depends on the implemented capabilities stored in the data fields of the structure ARM_ETH_MAC_CAPABILITIES, which can be retrieved with the function ARM_ETH_MAC_GetCapabilities.
The following events can be generated:
Parameter event | Bit | Description |
---|---|---|
ARM_ETH_MAC_EVENT_RX_FRAME | 0 | Occurs after a frame is received. Frame can be read by calling ARM_ETH_MAC_ReadFrame. |
ARM_ETH_MAC_EVENT_TX_FRAME | 1 | Occurs after call to ARM_ETH_MAC_SendFrame to indicate that the frame is transmitted. |
ARM_ETH_MAC_EVENT_WAKEUP | 2 | Indicates that a Magic Packet is received while the driver is in Sleep mode (set by ARM_ETH_MAC_SLEEP using ARM_ETH_MAC_Control). |
ARM_ETH_MAC_EVENT_TIMER_ALARM | 3 | Indicates that a Timer Alarm occurred that was set with ARM_ETH_MAC_TIMER_SET_ALARM using ARM_ETH_MAC_ControlTimer. |