const (
PA0 = portA + 0
PA1 = portA + 1
PA2 = portA + 2
PA3 = portA + 3
PA4 = portA + 4
PA5 = portA + 5
PA6 = portA + 6
PA7 = portA + 7
PA8 = portA + 8
PA9 = portA + 9
PA10 = portA + 10
PA11 = portA + 11
PA12 = portA + 12
PA13 = portA + 13
PA14 = portA + 14
PA15 = portA + 15
PB0 = portB + 0
PB1 = portB + 1
PB2 = portB + 2
PB3 = portB + 3
PB4 = portB + 4
PB5 = portB + 5
PB6 = portB + 6
PB7 = portB + 7
PB8 = portB + 8
PB9 = portB + 9
PB10 = portB + 10
PB11 = portB + 11
PB12 = portB + 12
PB13 = portB + 13
PB14 = portB + 14
PB15 = portB + 15
PC0 = portC + 0
PC1 = portC + 1
PC2 = portC + 2
PC3 = portC + 3
PC4 = portC + 4
PC5 = portC + 5
PC6 = portC + 6
PC7 = portC + 7
PC8 = portC + 8
PC9 = portC + 9
PC10 = portC + 10
PC11 = portC + 11
PC12 = portC + 12
PC13 = portC + 13
PC14 = portC + 14
PC15 = portC + 15
PD0 = portD + 0
PD1 = portD + 1
PD2 = portD + 2
PD3 = portD + 3
PD4 = portD + 4
PD5 = portD + 5
PD6 = portD + 6
PD7 = portD + 7
PD8 = portD + 8
PD9 = portD + 9
PD10 = portD + 10
PD11 = portD + 11
PD12 = portD + 12
PD13 = portD + 13
PD14 = portD + 14
PD15 = portD + 15
PE0 = portE + 0
PE1 = portE + 1
PE2 = portE + 2
PE3 = portE + 3
PE4 = portE + 4
PE5 = portE + 5
PE6 = portE + 6
PE7 = portE + 7
PE8 = portE + 8
PE9 = portE + 9
PE10 = portE + 10
PE11 = portE + 11
PE12 = portE + 12
PE13 = portE + 13
PE14 = portE + 14
PE15 = portE + 15
PH0 = portH + 0
PH1 = portH + 1
)
const (
LED = LED_BUILTIN
LED1 = LED_GREEN
LED2 = LED_ORANGE
LED3 = LED_RED
LED4 = LED_BLUE
LED_BUILTIN = LED_GREEN
LED_GREEN = PD12
LED_ORANGE = PD13
LED_RED = PD14
LED_BLUE = PD15
)
const (
UART_TX_PIN = PA2
UART_RX_PIN = PA3
)
UART pins
const NoPin = Pin(-1)
NoPin explicitly indicates “not a pin”. Use this pin if you want to leave one of the pins in a peripheral unconfigured (if supported by the hardware).
const (
// Mode Flag
PinOutput PinMode = 0
PinInput PinMode = PinInputFloating
PinInputFloating PinMode = 1
PinInputPulldown PinMode = 2
PinInputPullup PinMode = 3
// for UART
PinModeUartTX PinMode = 4
PinModeUartRX PinMode = 5
//GPIOx_MODER
GPIO_MODE_INPUT = 0
GPIO_MODE_GENERAL_OUTPUT = 1
GPIO_MODE_ALTERNABTIVE = 2
GPIO_MODE_ANALOG = 3
//GPIOx_OTYPER
GPIO_OUTPUT_MODE_PUSH_PULL = 0
GPIO_OUTPUT_MODE_OPEN_DRAIN = 1
// GPIOx_OSPEEDR
GPIO_SPEED_LOW = 0
GPIO_SPEED_MID = 1
GPIO_SPEED_HI = 2
GPIO_SPEED_VERY_HI = 3
// GPIOx_PUPDR
GPIO_FLOATING = 0
GPIO_PULL_UP = 1
GPIO_PULL_DOWN = 2
)
var (
ErrInvalidInputPin = errors.New("machine: invalid input pin")
ErrInvalidOutputPin = errors.New("machine: invalid output pin")
ErrInvalidClockPin = errors.New("machine: invalid clock pin")
ErrInvalidDataPin = errors.New("machine: invalid data pin")
)
var (
// Both UART0 and UART1 refer to USART2.
UART0 = UART{Buffer: NewRingBuffer()}
UART1 = &UART0
)
func CPUFrequency() uint32
func NewRingBuffer() *RingBuffer
NewRingBuffer returns a new ring buffer.
type ADC struct {
Pin Pin
}
type PWM struct {
Pin Pin
}
type Pin int8
Pin is a single pin on a chip, which may be connected to other hardware devices. It can either be used directly as GPIO pin or it can be used in other peripherals like ADC, I2C, etc.
func (p Pin) Configure(config PinConfig)
Configure this pin with the given configuration.
func (p Pin) High()
High sets this GPIO pin to high, assuming it has been configured as an output pin. It is hardware dependent (and often undefined) what happens if you set a pin to high that is not configured as an output pin.
func (p Pin) Low()
Low sets this GPIO pin to low, assuming it has been configured as an output pin. It is hardware dependent (and often undefined) what happens if you set a pin to low that is not configured as an output pin.
func (p Pin) Set(high bool)
Set the pin to high or low. Warning: only use this on an output pin!
type PinConfig struct {
Mode PinMode
}
type PinMode uint8
type RingBuffer struct {
rxbuffer [bufferSize]volatile.Register8
head volatile.Register8
tail volatile.Register8
}
RingBuffer is ring buffer implementation inspired by post at https://www.embeddedrelated.com/showthread/comp.arch.embedded/77084-1.php
It has some limitations currently due to how “volatile” variables that are members of a struct are not compiled correctly by TinyGo. See https://github.com/tinygo-org/tinygo/issues/151 for details.
func (rb *RingBuffer) Get() (byte, bool)
Get returns a byte from the buffer. If the buffer is empty, the method will return a false as the second value.
func (rb *RingBuffer) Put(val byte) bool
Put stores a byte in the buffer. If the buffer is already full, the method will return false.
func (rb *RingBuffer) Used() uint8
Used returns how many bytes in buffer have been used.
type UART struct {
Buffer *RingBuffer
}
UART
func (uart UART) Buffered() int
Buffered returns the number of bytes currently stored in the RX buffer.
func (uart UART) Configure(config UARTConfig)
Configure the UART.
func (uart UART) Read(data []byte) (n int, err error)
Read from the RX buffer.
func (uart UART) ReadByte() (byte, error)
ReadByte reads a single byte from the RX buffer. If there is no data in the buffer, returns an error.
func (uart UART) Receive(data byte)
Receive handles adding data to the UART’s data buffer. Usually called by the IRQ handler for a machine.
func (uart UART) Write(data []byte) (n int, err error)
Write data to the UART.
func (uart UART) WriteByte(c byte) error
WriteByte writes a byte of data to the UART.
type UARTConfig struct {
BaudRate uint32
TX Pin
RX Pin
}