Functions
void	Cy_ISOUART_NodeInit (ISOUART_Type base, const cy_stc_isouart_node_config_t config)
	Full Init of the iso UART in node mode. More...

void	Cy_ISOUART_NodeConfigTriggerInt (ISOUART_Type *base, uint8_t trigIntId, cy_en_isouart_event_t trigSrc, cy_en_isouart_event_t primIntSrc, cy_en_isouart_event_t secIntSrc)
	Configure one trigger and interrupt struct. More...

__STATIC_INLINE void	Cy_ISOUART_NodeSetWdtCount (ISOUART_Type *base, uint16_t counter)
	Updates Wdt down counter by SW. More...

__STATIC_INLINE uint16_t	Cy_ISOUART_NodeGetWdtCount (const ISOUART_Type *base)
	Get the current Wdt counter value. More...

__STATIC_INLINE void	Cy_ISOUART_NodeTriggerEMM (ISOUART_Type *base)
	Triggers emergency mode (EMM) signal transmission on the chain. More...

__STATIC_INLINE uint8_t	Cy_ISOUART_NodeGetClkCounter (ISOUART_Type *base)
	Returns the raw clock counter captured at the last sync frame. More...

__STATIC_INLINE cy_en_isouart_wakeup_source_t	Cy_ISOUART_NodeGetWakeupSource (const ISOUART_Type *base)
	Get the last wakeup source of the node. More...

__STATIC_INLINE bool	Cy_ISOUART_NodeGetMasterTopology (const ISOUART_Type *base)
	Get the current master topology configuration. More...

uint32_t	Cy_ISOUART_NodeGetNumMultiReadA (const ISOUART_Type *base)
	Get the number of reads from base address A after receiving multi-read command. More...

uint32_t	Cy_ISOUART_NodeGetNumMultiReadB (const ISOUART_Type *base)
	Get the number of reads from base address B after receiving multi-read command. More...

void	Cy_ISOUART_NodeGetInterfaceConfig (const ISOUART_Type base, cy_stc_isouart_node_interface_config_t config)
	Get node interface configuration. More...

Detailed Description

Function Documentation

◆ Cy_ISOUART_NodeInit()

void Cy_ISOUART_NodeInit	(	ISOUART_Type *	base,
		const cy_stc_isouart_node_config_t *	config
	)

Full Init of the iso UART in node mode.

Parameters

base	The base address for the iso UART.
config	Configuration options for the iso UART in node mode. See cy_stc_isouart_node_config_t.

Note: This function is valid only for Node.

Warning: This function depends on the SysClk frequency and requires re-initialization if it changes to avoid frame errors. Ensure that CSV events (if enabled) are handled properly and trigger re-initialization if the SysClk source switches to the backup source.

Function Usage: /* Populate Node configuration structure */
const cy_stc_isouart_node_config_t nodeConfig =
{
.crcPolicy = CY_ISOUART_CRC8_SAE_J1850, /* Match host CRC policy. */
.enableBlockId = true, /* Enable if host uses Block ID. */
.useTrig0Emm = false, /* No emergency mode trigger 0. */
.useTrig1Emm = false, /* No emergency mode trigger 1. */
.useTrig2Emm = false, /* No emergency mode trigger 2. */
.useTrig3Emm = false, /* No emergency mode trigger 3. */
.enableMultiReadBC = false, /* Disable broadcast multi-read. */
.baseAddressA = 0UL, /* Base address A for multi-read. */
.baseAddressB = 0UL, /* Base address B for multi-read. */
};
/* Configure iso UART Node to operate */
Cy_ISOUART_NodeInit(ISOUART, &nodeConfig);

◆ Cy_ISOUART_NodeConfigTriggerInt()

void Cy_ISOUART_NodeConfigTriggerInt	(	ISOUART_Type *	base,
		uint8_t	trigIntId,
		cy_en_isouart_event_t	trigSrc,
		cy_en_isouart_event_t	primIntSrc,
		cy_en_isouart_event_t	secIntSrc
	)

Configure one trigger and interrupt struct.

Parameters

base	The base address for the iso UART.
trigIntId	The trigger interrupt ID. The valid range is from 0 to 17.
trigSrc	Source of trigger. See cy_en_isouart_event_t.
primIntSrc	Source of primary interrupt. See cy_en_isouart_event_t.
secIntSrc	Source of secondary interrupt. See cy_en_isouart_event_t.

Note: This function is valid only for Node.

Function Usage: /* Scenario: Configure the iso UART Node interrupt trigger structure and SRAM row attributes.
* This setup enables Primary Access interrupt on write operations to SRAM address 0.
* The interrupt handler (IntrHandler) will process the triggered interrupt.
*/
/* Use trigger structure ID 1 to configure */
const uint8_t intrTrigStructId = 1U;
/* Configure interrupt trigger structure */
Cy_ISOUART_NodeConfigTriggerInt(ISOUART,
intrTrigStructId, /* Trigger structure ID */
CY_ISOUART_EVENT_NONE, /* Trigger source */
CY_ISOUART_EVENT_WRITE, /* Primary interrupt source */
CY_ISOUART_EVENT_NONE); /* Secondary interrupt source */
/* Configure SRAM row attributes for address 0 */
Cy_ISOUART_NodeConfigSramRowAttr(ISOUART,
SRAM_ADDRESS, /* SRAM address */
intrTrigStructId, /* Trigger structure ID */
false, /* Invalid address disabled */
false); /* Read protection disabled */

◆ Cy_ISOUART_NodeSetWdtCount()

__STATIC_INLINE void Cy_ISOUART_NodeSetWdtCount	(	ISOUART_Type *	base,
		uint16_t	counter
	)

Updates Wdt down counter by SW.

The Wdt is normally fed by host via iso UART write command. This function is not mandatory to be called in normal case.

Parameters

base	The base address for the iso UART.
counter	New counter value.

Note: This function is valid only for Node.

Function Usage: /* Scenario: Refresh the watchdog timer in the main loop to prevent Node from going into Sleep mode. */
for (;;)
{
/* Refresh a 7-bit watchdog timer. */
Cy_ISOUART_NodeSetWdtCount(ISOUART, 0x7F);
/* 50 ms delay between watchdog refreshes */
Cy_SysLib_Delay(50U);
}

◆ Cy_ISOUART_NodeGetWdtCount()

__STATIC_INLINE uint16_t Cy_ISOUART_NodeGetWdtCount ( const ISOUART_Type * base )

Get the current Wdt counter value.

Parameters

base	The base address for the iso UART.

Returns: Counter value.

Note: This function is valid only for Node.

◆ Cy_ISOUART_NodeTriggerEMM()

__STATIC_INLINE void Cy_ISOUART_NodeTriggerEMM ( ISOUART_Type * base )

Triggers emergency mode (EMM) signal transmission on the chain.

Parameters

base	The base address for the iso UART.

Note: This function is valid only for Node.

Warning: If called during active communication, it could cause a bus clash.

◆ Cy_ISOUART_NodeGetClkCounter()

__STATIC_INLINE uint8_t Cy_ISOUART_NodeGetClkCounter ( ISOUART_Type * base )

Returns the raw clock counter captured at the last sync frame.

This value is the number of peripheral clock cycles for the sync frame. Divide the returned value by 8 to obtain peripheral clock cycles per bit.

Parameters

base	The base address for the iso UART.

Returns: Raw clock counter value.

Note: This function is valid only for Node.

◆ Cy_ISOUART_NodeGetWakeupSource()

__STATIC_INLINE cy_en_isouart_wakeup_source_t Cy_ISOUART_NodeGetWakeupSource ( const ISOUART_Type * base )

Get the last wakeup source of the node.

Parameters

base	The base address for the iso UART.

Returns: Last wakeup source. See cy_en_isouart_wakeup_source_t.

Note: This function is valid only for Node.

Function Usage: /* Scenario: Get node wakeup source. */
cy_en_isouart_wakeup_source_t wakeupSource = Cy_ISOUART_NodeGetWakeupSource(ISOUART);
/* Check if wakeup was caused by GPIO or iso UART */
if (CY_ISOUART_WAKEUP_GPIO == wakeupSource)
{
/* Handle GPIO wakeup */
}
else if (CY_ISOUART_WAKEUP_ISOUART == wakeupSource)
{
/* Handle iso UART wakeup */
}

◆ Cy_ISOUART_NodeGetMasterTopology()

__STATIC_INLINE bool Cy_ISOUART_NodeGetMasterTopology ( const ISOUART_Type * base )

Get the current master topology configuration.

Parameters

base	The base address for the iso UART.

Returns

Current master topology configuration.

true : The topology is MOT (Master On Top).
false : The topology is MOB (Master On Bottom).

Note: This function is valid only for Node.
This function does not distinguish between ring and non-ring topologies. It only indicates whether the master is positioned at the top or bottom of the chain.

Function Usage: /* Scenario: Get current master topology. */
/* Master topology check macros */
#define MOT_TOPOLOGY (true)
#define MOB_TOPOLOGY (false)
bool masterTopology = Cy_ISOUART_NodeGetMasterTopology(ISOUART);
/* Check master topology configuration */
if (MOT_TOPOLOGY == masterTopology)
{
/* Handle Master On Top topology */
}
else if (MOB_TOPOLOGY == masterTopology)
{
/* Handle Master On Bottom topology */
}

◆ Cy_ISOUART_NodeGetNumMultiReadA()

uint32_t Cy_ISOUART_NodeGetNumMultiReadA ( const ISOUART_Type * base )

Get the number of reads from base address A after receiving multi-read command.

Parameters

base	The base address for the iso UART.

Returns: Number of reads from base address A.

Note: This function is valid only for Node.

◆ Cy_ISOUART_NodeGetNumMultiReadB()

uint32_t Cy_ISOUART_NodeGetNumMultiReadB ( const ISOUART_Type * base )

Get the number of reads from base address B after receiving multi-read command.

Parameters

base	The base address for the iso UART.

Returns: Number of reads from base address B.

Note: This function is valid only for Node.

◆ Cy_ISOUART_NodeGetInterfaceConfig()

void Cy_ISOUART_NodeGetInterfaceConfig	(	const ISOUART_Type *	base,
		cy_stc_isouart_node_interface_config_t *	config
	)

Get node interface configuration.

Parameters

base	The base address for the iso UART.
config	Pointer to a configuration structure to be filled. See cy_stc_isouart_node_interface_config_t

Note: This function is valid only for Node.

Functions

Detailed Description

Function Documentation

◆ Cy_ISOUART_NodeInit()

◆ Cy_ISOUART_NodeConfigTriggerInt()

◆ Cy_ISOUART_NodeSetWdtCount()

◆ Cy_ISOUART_NodeGetWdtCount()

◆ Cy_ISOUART_NodeTriggerEMM()

◆ Cy_ISOUART_NodeGetClkCounter()

◆ Cy_ISOUART_NodeGetWakeupSource()

◆ Cy_ISOUART_NodeGetMasterTopology()

◆ Cy_ISOUART_NodeGetNumMultiReadA()

◆ Cy_ISOUART_NodeGetNumMultiReadB()

◆ Cy_ISOUART_NodeGetInterfaceConfig()