tlm_uart.c File Reference

Frame transmission via UART + DMA, synchronised with a CMSIS-RTOS2 semaphore. More...

#include "tlm_uart.h"
#include "cmsis_os2.h"
#include <string.h>

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Macros
#define	TLM_UART_BUF   256u

Functions
int	tlm_uart_init (UART_HandleTypeDef *huart)
int	tlm_uart_send (const uint8_t *buf, uint16_t len, uint32_t timeout_ms)
	Non-blocking beyond timeout_ms: if the previous DMA has not finished, the frame is dropped.
void	tlm_uart_tx_cplt_isr (UART_HandleTypeDef *huart)
	To be called from HAL_UART_TxCpltCallback() (see 03 - Docs/firmware/build.md)
uint32_t	tlm_uart_dropped (void)

Variables
static UART_HandleTypeDef *	s_huart
static osSemaphoreId_t	s_txFree
static uint8_t	s_dmaBuf [TLM_UART_BUF]
static volatile uint32_t	s_dropped

Detailed Description

Frame transmission via UART + DMA, synchronised with a CMSIS-RTOS2 semaphore.

Definition in file tlm_uart.c.

Macro Definition Documentation

TLM_UART_BUF

#define TLM_UART_BUF   256u

Definition at line 9 of file tlm_uart.c.

Function Documentation

tlm_uart_init()

int tlm_uart_init

(

UART_HandleTypeDef *

huart

)

Definition at line 16 of file tlm_uart.c.

References s_huart, and s_txFree.

Referenced by TelemetryTask().

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tlm_uart_send()

int tlm_uart_send	(	const uint8_t *	buf,
		uint16_t	len,
		uint32_t	timeout_ms
	)

Non-blocking beyond timeout_ms: if the previous DMA has not finished, the frame is dropped.

Definition at line 23 of file tlm_uart.c.

References s_dmaBuf, s_dropped, s_huart, s_txFree, and TLM_UART_BUF.

Referenced by tx_frame().

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tlm_uart_tx_cplt_isr()

void tlm_uart_tx_cplt_isr

(

UART_HandleTypeDef *

huart

)

To be called from HAL_UART_TxCpltCallback() (see 03 - Docs/firmware/build.md)

Definition at line 36 of file tlm_uart.c.

References s_huart, and s_txFree.

Referenced by app_uart_tx_cplt().

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tlm_uart_dropped()

uint32_t tlm_uart_dropped

(

void

)

Definition at line 41 of file tlm_uart.c.

References s_dropped.

Referenced by send_status().

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Variable Documentation

s_huart

UART_HandleTypeDef* s_huart

static

Definition at line 11 of file tlm_uart.c.

Referenced by tlm_uart_init(), tlm_uart_send(), and tlm_uart_tx_cplt_isr().

s_txFree

osSemaphoreId_t s_txFree

static

Definition at line 12 of file tlm_uart.c.

Referenced by tlm_uart_init(), tlm_uart_send(), and tlm_uart_tx_cplt_isr().

s_dmaBuf

uint8_t s_dmaBuf[TLM_UART_BUF]

static

Definition at line 13 of file tlm_uart.c.

Referenced by tlm_uart_send().

s_dropped

volatile uint32_t s_dropped

static

Definition at line 14 of file tlm_uart.c.

Referenced by tlm_uart_dropped(), and tlm_uart_send().