Struct imxrt_boot_gen::flexspi::ConfigurationBlock

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#[repr(C, packed)]
pub struct ConfigurationBlock { /* private fields */ }

Expand description

FlexSPI configuration block

The FlexSPI configuration block consists of parameters that are for specific flash devices. The configuration block includes the FlexSPI LookupTable. The configuration block is shared between serial NOR and NAND configuration blocks.

Default Values

cs_hold_time is RECOMMENDED_CS_HOLD_TIME
cs_setup_time is RECOMMENDED_CS_SETUP_TIME

All other configurable values are set to a bit pattern of 0.

Examples

use imxrt_boot_gen::flexspi::*;

const FLEXSPI_CONFIGURATION_BLOCK: ConfigurationBlock =
    ConfigurationBlock::new(LUT)
        .read_sample_clk_src(ReadSampleClockSource::LoopbackFromDQSPad)
        .cs_hold_time(0x01)
        .cs_setup_time(0x02)
        .column_address_width(ColumnAddressWidth::OtherDevices)
        .device_mode_configuration(DeviceModeConfiguration::Disabled)
        .wait_time_cfg_commands(WaitTimeConfigurationCommands::new(40_000))
        .flash_size(SerialFlashRegion::A1, 0x0020_0000)
        .serial_clk_freq(SerialClockFrequency::MHz60)
        .serial_flash_pad_type(FlashPadType::Quad);

Implementations

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impl ConfigurationBlock

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pub const fn new(lookup_table: LookupTable) -> Self

Create a new configuration block that uses lookup_table as the FlexSPI LUT

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pub const fn version(self, version: Version) -> Self

Override the version.

The default value is VERSION_DEFAULT.

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pub const fn read_sample_clk_src(
self,
read_sample_clk_src: ReadSampleClockSource
) -> Self

readSampleClkSrc, the clock source for FlexSPI

If not set, this defaults to ReadSampleClockSource::InternalLoopback.

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pub const fn cs_hold_time(self, cs_hold_time: u8) -> Self

Set the chip select hold time (csHoldTime)

If not set, this will be RECOMMENDED_CS_HOLD_TIME, which is 0x03.

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pub const fn cs_setup_time(self, cs_setup_time: u8) -> Self

Set the chip select setup time (csSetupTime)

If not set, this will be RECOMMENDED_CS_SETUP_TIME, which is 0x03.

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pub const fn column_address_width(
self,
column_address_width: ColumnAddressWidth
) -> Self

columnAddressWidth, the properties of the flash memory

If not set, this defaults to ColumnAddressWidth::OtherDevices

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pub const fn device_mode_configuration(
self,
device_mode_configuration: DeviceModeConfiguration
) -> Self

Sets device configuration mode. The DeviceModeConfiguration::Disabled variant will set deviceModeCfgEnable to “disabled”. Otherwise, we will set deviceModeCfgEnable to “enabled,” and we use the sequence and argument parameters in the FCB.

If not set, this defaults to DeviceModeConfiguration::Disabled.

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