KEYSCAN - Keyboard Scan#

sl_keyscan_delay_t#

sl_keyscan_delay_t

KEYSCAN configuration delay values.

sl_keyscan_init#

void sl_keyscan_init (const sl_keyscan_config_t * p_config)

Initializes KEYSCAN module.

sl_keyscan_enable#

void sl_keyscan_enable (void )

Enables KEYSCAN module.

sl_keyscan_disable#

void sl_keyscan_disable (void )

Disables KEYSCAN module.

Note

• The disabling of the module could take some time. This function will not wait for the disabling to finish before returning. Use the function sl_keyscan_wait_ready to wait for the module to be fully disable.

sl_keyscan_wait_ready#

void sl_keyscan_wait_ready (void )

Waits for the KEYSCAN to complete reseting or disabling procedure.

sl_keyscan_wait_sync#

void sl_keyscan_wait_sync (void )

Waits for the KEYSCAN to complete all synchronization of register changes and commands.

sl_keyscan_start_scan#

void sl_keyscan_start_scan (void )

Starts KEYSCAN scan.

Note

• This function will send a start command to the KEYSCAN peripheral. The sl_keyscan_wait_sync function can be used to wait for the start command to be executed.

• This function requires the KEYSCAN to be enabled.

sl_keyscan_stop_scan#

void sl_keyscan_stop_scan (void )

Stops the KEYSCAN scan.

Note

• This function will send a stop command to the KEYSCAN peripheral. The sl_keyscan_wait_sync function can be used to wait for the stop command to be executed.

• This function requires the KEYSCAN to be enabled.

sl_keyscan_reset#

void sl_keyscan_reset (void )

Restores KEYSCAN to its reset state.

Note

• The resetting of the module could take some time. This function will not wait for the resetting to finish before returning. Use the function sl_keyscan_wait_ready to wait for the module to be fully reset.

• The register STATUS get reset value after enabling the module because it is of type RSYNC

sl_keyscan_get_status#

uint32_t sl_keyscan_get_status (void )

Gets KEYSCAN STATUS register value.

Returns

• Current STATUS register value.

sl_keyscan_enable_interrupts#

void sl_keyscan_enable_interrupts (uint32_t flags)

Enables one or more KEYSCAN interrupts.

Note

• Depending on the use, a pending interrupt may already be set prior to enabling the interrupt. To ignore a pending interrupt, consider using sl_keyscan_clear_interrupts prior to enabling the interrupt.

sl_keyscan_disable_interrupts#

void sl_keyscan_disable_interrupts (uint32_t flags)

Disables one or more KEYSCAN interrupts.

sl_keyscan_clear_interrupts#

void sl_keyscan_clear_interrupts (uint32_t flags)

Clears one or more pending KEYSCAN interrupts.

sl_keyscan_get_interrupts#

uint32_t sl_keyscan_get_interrupts (void )

Gets pending KEYSCAN interrupt flags.

Note

• Event bits are not cleared by using this function.

Returns

• Pending KEYSCAN interrupt sources. Returns a set of interrupt flags OR-ed together for multiple interrupt sources.

sl_keyscan_get_enabled_interrupts#

uint32_t sl_keyscan_get_enabled_interrupts (void )

Gets enabled and pending KEYSCAN interrupt flags.

Useful for handling more interrupt sources in the same interrupt handler.

Note

• Interrupt flags are not cleared by using this function.

Returns

• Pending and enabled KEYSCAN interrupt sources. The return value is the bitwise AND of

  • the enabled interrupt sources in KEYSCAN_IEN and

  • the pending interrupt flags KEYSCAN_IF.

sl_keyscan_set_interrupts#

void sl_keyscan_set_interrupts (uint32_t flags)

Sets one or more pending KEYSCAN interrupts from Software.