mirror of
https://github.com/mruby/mruby
synced 2026-06-08 16:11:16 +00:00
Yukihiro "Matz" Matsumoto
2b5a389de3
Add three new gems for UART serial communication: - hw-uart: common Ruby API, C bindings, ring buffer, and HAL header - hw-esp32-uart: ESP32 HAL using ESP-IDF UART driver with FreeRTOS RX task - hw-rp2040-uart: RP2040 HAL using Pico SDK with IRQ-driven RX Co-authored-by: Claude <noreply@anthropic.com>
55 lines
1.4 KiB
Ruby
55 lines
1.4 KiB
Ruby
class UART
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PARITY_NONE = 0
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PARITY_EVEN = 1
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PARITY_ODD = 2
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FLOW_CONTROL_NONE = 0
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FLOW_CONTROL_RTS_CTS = 1
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attr_reader :baudrate
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def initialize(unit:, tx_pin: -1, rx_pin: -1, baudrate: 9600,
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data_bits: 8, stop_bits: 1, parity: PARITY_NONE,
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flow_control: FLOW_CONTROL_NONE, rx_buffer_size: 256)
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__open_rx_buffer(rx_buffer_size)
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@unit_num = __open_connection(unit.to_s, tx_pin, rx_pin)
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@baudrate = __set_baudrate(baudrate)
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__set_format(data_bits, stop_bits, parity)
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set_flow_control(flow_control)
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@line_ending = "\n"
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end
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def setmode(baudrate: nil, data_bits: nil, stop_bits: nil,
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parity: nil, flow_control: nil)
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@baudrate = __set_baudrate(baudrate) if baudrate
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__set_format(data_bits || 8, stop_bits || 1, parity || PARITY_NONE)
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set_flow_control(flow_control || FLOW_CONTROL_NONE)
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self
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end
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def line_ending=(ending)
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unless ["\n", "\r", "\r\n"].include?(ending)
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raise ArgumentError, "invalid line ending"
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end
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@line_ending = ending
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end
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def puts(str)
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write str
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write @line_ending unless str.end_with?(@line_ending)
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nil
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end
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private
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def set_flow_control(mode)
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case mode
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when FLOW_CONTROL_NONE
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__set_flow_control(false, false)
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when FLOW_CONTROL_RTS_CTS
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__set_flow_control(true, true)
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else
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raise ArgumentError, "invalid flow control mode"
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end
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end
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end
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