fix: LpUart::new() set tx_idle_num to 0 twice

[zpg6]

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Pull Request Details 📖

Description

In the LpUart::new() function in esp-hal/src/uart.rs

// 🟨 FIRST TIME:
// Set tx idle
me.uart
    .idle_conf()
    .modify(|_, w| unsafe { w.tx_idle_num().bits(0) });

// Disable hw-flow control
me.uart
    .hwfc_conf()
    .modify(|_, w| w.rx_flow_en().clear_bit());

// Get source clock frequency
// default == SOC_MOD_CLK_RTC_FAST == 2

// LP_CLKRST.lpperi.lp_uart_clk_sel = 0;
unsafe { LP_CLKRST::steal() }
    .lpperi()
    .modify(|_, w| w.lp_uart_clk_sel().clear_bit());

// Override protocol parameters from the configuration
// uart_hal_set_baudrate(&hal, cfg->uart_proto_cfg.baud_rate, sclk_freq);
me.change_baud_internal(config.baudrate, config.clock_source);
// uart_hal_set_parity(&hal, cfg->uart_proto_cfg.parity);
me.change_parity(config.parity);
// uart_hal_set_data_bit_num(&hal, cfg->uart_proto_cfg.data_bits);
me.change_data_bits(config.data_bits);
// uart_hal_set_stop_bits(&hal, cfg->uart_proto_cfg.stop_bits);
me.change_stop_bits(config.stop_bits);

// 🟨 SECOND TIME:
// uart_hal_set_tx_idle_num(&hal, LP_UART_TX_IDLE_NUM_DEFAULT);
me.change_tx_idle(0); // LP_UART_TX_IDLE_NUM_DEFAULT == 0

I removed 🟨 FIRST TIME, as I do not see any impacts of leaving tx_idle_num as default (256) until it is called a few lines later.

Testing

Ongoing