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drivers/periph/uart: add periph_uart_tx_ondemand feature #20108

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merged 4 commits into from
Dec 14, 2023
Merged

drivers/periph/uart: add periph_uart_tx_ondemand feature #20108

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138cbb8
drivers/soft_uart: include board.h
benpicco Nov 23, 2023
fc9669b
drivers/periph/uart: add periph_uart_tx_ondemand feature
benpicco Nov 23, 2023
60f8468
cpu/sam0_common: implement uart_tx_ondemand
benpicco Nov 22, 2023
9cde80e
drivers_dose: enable TX UART on-demand
benpicco Nov 22, 2023
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cpu/sam0_common: implement uart_tx_ondemand
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@benpicco
benpicco committed Dec 14, 2023
commit 60f84681917a0a3e755d0ee8b51939414aca2463
1 change: 1 addition & 0 deletions cpu/sam0_common/Kconfig
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Expand Up @@ -29,6 +29,7 @@ config CPU_COMMON_SAM0
select HAS_PERIPH_UART_NONBLOCKING
select HAS_PERIPH_UART_RECONFIGURE
select HAS_PERIPH_UART_RXSTART_IRQ
select HAS_PERIPH_UART_TX_ONDEMAND
select HAS_PERIPH_WDT
select HAS_PERIPH_WDT_CB
select HAS_PERIPH_WDT_WARNING_PERIOD
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1 change: 1 addition & 0 deletions cpu/sam0_common/Makefile.features
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Expand Up @@ -27,6 +27,7 @@ FEATURES_PROVIDED += periph_uart_modecfg
FEATURES_PROVIDED += periph_uart_nonblocking
FEATURES_PROVIDED += periph_uart_reconfigure
FEATURES_PROVIDED += periph_uart_rxstart_irq
FEATURES_PROVIDED += periph_uart_tx_ondemand
FEATURES_PROVIDED += periph_wdt periph_wdt_cb periph_wdt_warning_period

FEATURES_CONFLICT += periph_rtc:periph_rtt
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1 change: 1 addition & 0 deletions cpu/sam0_common/include/periph_cpu_common.h
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Expand Up @@ -188,6 +188,7 @@ typedef enum {
UART_FLAG_NONE = 0x0, /**< No flags set */
UART_FLAG_RUN_STANDBY = 0x1, /**< run SERCOM in standby mode */
UART_FLAG_WAKEUP = 0x2, /**< wake from sleep on receive */
UART_FLAG_TX_ONDEMAND = 0x4, /**< Only enable TX pin on demand */
} uart_flag_t;

#ifndef DOXYGEN
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19 changes: 18 additions & 1 deletion cpu/sam0_common/periph/uart.c
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Expand Up @@ -129,6 +129,22 @@ static void _set_baud(uart_t uart, uint32_t baudrate, uint32_t f_src)
#endif
}

void uart_enable_tx(uart_t uart)
{
/* configure RX pin */
if (uart_config[uart].tx_pin != GPIO_UNDEF) {
gpio_init_mux(uart_config[uart].tx_pin, uart_config[uart].mux);
}
}

void uart_disable_tx(uart_t uart)
{
/* configure RX pin */
if (uart_config[uart].tx_pin != GPIO_UNDEF) {
gpio_init_mux(uart_config[uart].tx_pin, GPIO_MUX_A);
}
}

static void _configure_pins(uart_t uart)
{
/* configure RX pin */
Expand All @@ -138,7 +154,8 @@ static void _configure_pins(uart_t uart)
}

/* configure TX pin */
if (uart_config[uart].tx_pin != GPIO_UNDEF) {
if (uart_config[uart].tx_pin != GPIO_UNDEF &&
!(uart_config[uart].flags & UART_FLAG_TX_ONDEMAND)) {
gpio_set(uart_config[uart].tx_pin);
gpio_init(uart_config[uart].tx_pin, GPIO_OUT);
gpio_init_mux(uart_config[uart].tx_pin, uart_config[uart].mux);
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