hpm_dp83848.h File Reference

DP83848 Ethernet PHY driver header file. More...

#include "hpm_enet_phy.h"
#include "hpm_common.h"
#include "hpm_enet_regs.h"

Go to the source code of this file.

Data Structures
struct	dp83848_config_t
	DP83848 PHY configuration structure. More...

Macros
#define	DP83848_ADDR   (1U)
	Default PHY address for DP83848. More...
#define	DP83848_ID1   (0x2000U)
	DP83848 PHY ID register 1 value (OUI MSB) More...
#define	DP83848_ID2   (0x17U)
	DP83848 PHY ID register 2 value (OUI LSB) More...

Enumerations
enum	dp83848_config_refclk_direction_t { dp83848_config_refclk_input = 0 }
	DP83848 reference clock direction configuration. More...

Functions
bool	dp83848_reset (ENET_Type *ptr, uint32_t phy_addr)
	Reset DP83848 PHY chip. More...
void	dp83848_basic_mode_default_config (ENET_Type *ptr, dp83848_config_t *config)
	Set default configuration for DP83848 PHY basic mode. More...
bool	dp83848_basic_mode_init (ENET_Type *ptr, uint32_t phy_addr, dp83848_config_t *config)
	Initialize DP83848 PHY chip in basic mode. More...
void	dp83848_get_phy_status (ENET_Type *ptr, uint32_t phy_addr, enet_phy_status_t *status)
	Get DP83848 PHY status. More...

Detailed Description

DP83848 Ethernet PHY driver header file.

This file provides the API definitions for the DP83848 Ethernet PHY chip driver. The DP83848 is a single-port 10/100-Mbps Ethernet physical layer transceiver.

Macro Definition Documentation

DP83848_ADDR

#define DP83848_ADDR   (1U)

Default PHY address for DP83848.

DP83848_ID1

#define DP83848_ID1   (0x2000U)

DP83848 PHY ID register 1 value (OUI MSB)

DP83848_ID2

#define DP83848_ID2   (0x17U)

DP83848 PHY ID register 2 value (OUI LSB)

Enumeration Type Documentation

dp83848_config_refclk_direction_t

enum dp83848_config_refclk_direction_t

DP83848 reference clock direction configuration.

Enumerator
dp83848_config_refclk_input	Reference clock input mode

Function Documentation

dp83848_basic_mode_default_config()

void dp83848_basic_mode_default_config	(	ENET_Type *	ptr,
		dp83848_config_t *	config
	)

Set default configuration for DP83848 PHY basic mode.

Parameters

[in]	ptr	Pointer to the ENET peripheral base address
[out]	config	Pointer to the configuration structure to be initialized

This function initializes the configuration structure with default values:

• Loopback: disabled
• Auto-negotiation: enabled (unless __DISABLE_AUTO_NEGO is defined)
• Speed: 100 Mbps (when auto-negotiation is disabled)
• Duplex: full duplex (when auto-negotiation is disabled)

dp83848_basic_mode_init()

bool dp83848_basic_mode_init	(	ENET_Type *	ptr,
		uint32_t	phy_addr,
		dp83848_config_t *	config
	)

Initialize DP83848 PHY chip in basic mode.

Parameters

[in]	ptr	Pointer to the ENET peripheral base address
[in]	phy_addr	PHY address
[in]	config	Pointer to the PHY configuration structure

Return values

true	Initialization completed successfully
false	Initialization failed (PHY ID check failed)

This function performs the following operations:

• Verifies the PHY ID to ensure it's a DP83848 chip
• Configures the PHY according to the provided configuration
• Sets up loopback mode, auto-negotiation, speed, and duplex settings

dp83848_get_phy_status()

void dp83848_get_phy_status	(	ENET_Type *	ptr,
		uint32_t	phy_addr,
		enet_phy_status_t *	status
	)

Get DP83848 PHY status.

Parameters

[in]	ptr	Pointer to the ENET peripheral base address
[in]	phy_addr	PHY address
[out]	status	Pointer to the status structure to store PHY status

This function reads the PHY status register and extracts:

• Link status (up/down)
• Port speed (10 Mbps or 100 Mbps)
• Duplex mode (half or full)

dp83848_reset()

bool dp83848_reset	(	ENET_Type *	ptr,
		uint32_t	phy_addr
	)

Reset DP83848 PHY chip.

Parameters

[in]	ptr	Pointer to the ENET peripheral base address
[in]	phy_addr	PHY address

Return values

true	Reset operation completed successfully
false	Reset operation failed (timeout)