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Uart improvments (#1024)

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* uart: Add support for specifying the number of bits and parity.

ESP8266SwSerial doesn't really check parity but just read the parity bit
and ignore it when receiving data.

Signed-off-by: 0hax <0hax@protonmail.com>

* uart: support begin and end methods.

A component may need to reset uart buffer/status by using begin() and
end() methods. This is useful for example when a component needs to be
sure it is not reading garbage from previously received data over uart.
For end() methods with software serial, disabling interrupt is
currently impossible because of a bug in esp8266 Core:
https://github.com/esp8266/Arduino/issues/6049

Signed-off-by: 0hax <0hax@protonmail.com>

* esphal: add support for detaching an interrupt.

That's needed when a component needs to enable/disable interrupt on a
gpio.

Signed-off-by: 0hax <0hax@protonmail.com>

* uart: rename CONF_NR_BITS to CONF_DATA_BITS_NUMBER.

Signed-off-by: 0hax <0hax@protonmail.com>

* uart: use static const uint32_t instead of #define.

Signed-off-by: 0hax <0hax@protonmail.com>

* uart: use an enum to handle parity.

Signed-off-by: 0hax <0hax@protonmail.com>

* uart: split between esp32 and esp8266.

Signed-off-by: 0hax <0hax@protonmail.com>

* uart: check_uart_settings for parity and number of data bits.

Signed-off-by: 0hax <0hax@protonmail.com>

* name param data_bits

* add new params to test

Co-authored-by: Guillermo Ruffino <glm.net@gmail.com>
This commit is contained in:
0hax
2020-05-24 23:59:07 +02:00
committed by GitHub
parent 4de44a99eb
commit fb2b7ade41
8 changed files with 572 additions and 343 deletions
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14
esphome/components/uart/__init__.py
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@@ -28,13 +28,25 @@ def validate_rx_pin(value):
return value
UARTParityOptions = uart_ns.enum('UARTParityOptions')
UART_PARITY_OPTIONS = {
'NONE': UARTParityOptions.UART_CONFIG_PARITY_NONE,
'EVEN': UARTParityOptions.UART_CONFIG_PARITY_EVEN,
'ODD': UARTParityOptions.UART_CONFIG_PARITY_ODD,
}
CONF_STOP_BITS = 'stop_bits'
CONF_DATA_BITS = 'data_bits'
CONF_PARITY = 'parity'
CONFIG_SCHEMA = cv.All(cv.Schema({
cv.GenerateID(): cv.declare_id(UARTComponent),
cv.Required(CONF_BAUD_RATE): cv.int_range(min=1),
cv.Optional(CONF_TX_PIN): pins.output_pin,
cv.Optional(CONF_RX_PIN): validate_rx_pin,
cv.Optional(CONF_STOP_BITS, default=1): cv.one_of(1, 2, int=True),
cv.Optional(CONF_DATA_BITS, default=8): cv.int_range(min=5, max=8),
cv.Optional(CONF_PARITY, default="NONE"): cv.enum(UART_PARITY_OPTIONS, upper=True)
}).extend(cv.COMPONENT_SCHEMA), cv.has_at_least_one_key(CONF_TX_PIN, CONF_RX_PIN))
@@ -50,6 +62,8 @@ def to_code(config):
if CONF_RX_PIN in config:
cg.add(var.set_rx_pin(config[CONF_RX_PIN]))
cg.add(var.set_stop_bits(config[CONF_STOP_BITS]))
cg.add(var.set_data_bits(config[CONF_DATA_BITS]))
cg.add(var.set_parity(config[CONF_PARITY]))
# A schema to use for all UART devices, all UART integrations must extend this!