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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>
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