Unit PXL.Boards.Types
Description
Basic types and components commonly used on microcontrollers and compact singleboard devices.
Overview
Classes, Interfaces, Objects and Records
Class TCustomADC |
Abstract ADC (Analog-to-Digital Converter) manager. |
Class TCustomDataPort |
Abstract communication manager can be used for reading and writing data. |
Class TCustomGPIO |
Abstract GPIO (General Purpose Input / Output) manager. |
Class TCustomPortI2C |
Abstract I2C (Inter-Integrated Circuit) communication manager. |
Class TCustomPortSPI |
Abstract SPI (Serial Peripheral Interface) communication manager. |
Class TCustomPortUART |
Abstract UART (Universal Asynchronous Receiver / Transmitter) communication manager. |
Class TCustomPWM |
Abstract PWM (Pulse-Width Modulation) manager. |
Class TCustomSystemCore |
System core of the board, which provides high-performance utility functions for accurate timing and delays. |
Types
Constants
Description
Types
TBitsPerWord = Cardinal; |
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Number of bits each data packet (or "word) occupies.
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TChipSelectMode = (...); |
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Chip Select operation mode.
Values
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Disabled: Chip Select pin shuld not be managed.
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ActiveLow: Chip Select should be helf active low during operations. This is the default mode.
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ActiveHigh: Chip Select should be helf active high during operations.
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TParity = (...); |
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Parity bit type used for transceiving binary strings.
Values
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None = 0: No parity bit.
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Odd = 1: Odd parity bit.
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Even = 2: Even parity bit.
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TPinChannel = TPinIdentifier; |
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Generic channel number, which can actually represent a physical pin.
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TPinDrive = (...); |
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Drive mode that is used in GPIO pins.
Values
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None: Strong low and high or high-impedance (no pull-up or pull-down resistor).
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PullUp: Resistive high, strong low (pull-up resistor).
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PullDown: Resistive low, strong high (pull-down resistor).
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TPinIdentifier = Cardinal; |
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Unique number that identifies each individual pin on the chip. The actual interpretation and meaning of this value may vary on different implementations.
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TPinMode = (...); |
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I/O mode typically used in GPIO pins.
Values
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Input = 0: Pin set for input / high impedance
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Output = 1: Pin set for output
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Unknown = 99: Pin set for alternate Pinfunction
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TPinValue = (...); |
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Digital value of the pin.
Values
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Low = 0: Low (0) or zero voltage.
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High = 1: High (1) or full voltage.
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TSignalEdge = (...); |
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Transition type of digital signal on a certain pin.
Values
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None: Depending on implementation this value can mean either that transition is unknown, disabled or using both falling and raising edges.
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Falling: Falling edge, where signal goes from high (1) to low (0).
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Raising: Raising edge, where signal goes from low (0) to high (1).
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TSPIMode = Cardinal; |
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SPI operation mode. The actual interpretation of this value depends on each platform and implementation.
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TStopBits = (...); |
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Number of stop bits used for transceiving binary strings.
Values
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One = 0: One stop bit.
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OneDotFive = 1: One and "half" stop bits.
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Two = 2: Two stop bits.
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TTickCounter = UInt64 ; |
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Special unsigned integer that is used to represent ticks in microseconds.
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Constants
DefaultSPIFrequency = 8000000; |
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Default frequency at which SPI controller operates.
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DefaultUARTBaudRate = 115200; |
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Default baud rate at which UART controller operates.
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MaxI2CTransferSize = 32 ; |
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Maximum number of bytes that can be reliably sent through I2C protocol in each read/write call.
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MaxSPITransferSize = 4096 ; |
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Maximum number of bytes that can be reliably sent through SPI protocol in each read/write call.
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PinDisabled = TPinIdentifier(-1); |
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Constant value indicating that the specified pin is not connected and should not be used.
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Copyright © 2000 - 2017 Yuriy Kotsarenko. Help files generated by PasDoc.
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