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lm4f/uart: Implemented a function to get the current parity setting for a UART

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dragonmux
2022-08-23 03:19:59 +01:00
committed by Piotr Esden-Tempski
parent f0262cb4a9
commit 10cfbd7652
2 changed files with 21 additions and 0 deletions
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1
include/libopencm3/lm4f/uart.h
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@@ -448,6 +448,7 @@ uint8_t uart_get_databits(uint32_t uart);
void uart_set_stopbits(uint32_t uart, uint8_t stopbits); void uart_set_stopbits(uint32_t uart, uint8_t stopbits);
uint8_t uart_get_stopbits(uint32_t uart); uint8_t uart_get_stopbits(uint32_t uart);
void uart_set_parity(uint32_t uart, enum uart_parity parity); void uart_set_parity(uint32_t uart, enum uart_parity parity);
enum uart_parity uart_get_parity(uint32_t uart);
void uart_set_mode(uint32_t uart, uint32_t mode); void uart_set_mode(uint32_t uart, uint32_t mode);
void uart_set_flow_control(uint32_t uart, enum uart_flowctl flow); void uart_set_flow_control(uint32_t uart, enum uart_flowctl flow);
void uart_enable(uint32_t uart); void uart_enable(uint32_t uart);

20
lib/lm4f/uart.c
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@@ -214,6 +214,26 @@ void uart_set_parity(uint32_t uart, enum uart_parity parity)
UART_LCRH(uart) = reg32; UART_LCRH(uart) = reg32;
} }
enum uart_parity uart_get_parity(uint32_t uart)
{
const uint32_t reg32 = UART_LCRH(uart);
/* Check if parity is even enabled */
if (!(reg32 & UART_LCRH_PEN))
return UART_PARITY_NONE;
/* Check for sticky modes */
if (reg32 & UART_LCRH_SPS) {
if (reg32 & UART_LCRH_EPS) {
return UART_PARITY_STICK_0;
}
return UART_PARITY_STICK_1;
} else {
if (reg32 & UART_LCRH_EPS) {
return UART_PARITY_EVEN;
}
return UART_PARITY_ODD;
}
}
/** /**
* \brief Set the flow control scheme * \brief Set the flow control scheme
* *