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uart.c
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/*
*******************************************************************************
* Copyright (c) 2016-2021, STMicroelectronics
* All rights reserved.
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
*******************************************************************************
*/
#include "core_debug.h"
#include "lock_resource.h"
#include "uart.h"
#include "Arduino.h"
#include "PinAF_STM32F1.h"
#ifdef __cplusplus
extern "C" {
#endif
#if defined(HAL_UART_MODULE_ENABLED) && !defined(HAL_UART_MODULE_ONLY)
/* If DEBUG_UART is not defined assume this is the one linked to PIN_SERIAL_TX */
#if !defined(DEBUG_UART)
#if defined(PIN_SERIAL_TX)
#define DEBUG_UART pinmap_peripheral(digitalPinToPinName(PIN_SERIAL_TX), PinMap_UART_TX)
#define DEBUG_PINNAME_TX digitalPinToPinName(PIN_SERIAL_TX)
#else
/* No debug UART defined */
#define DEBUG_UART NP
#define DEBUG_PINNAME_TX NC
#endif
#endif
#if !defined(DEBUG_UART_BAUDRATE)
#define DEBUG_UART_BAUDRATE 9600
#endif
/* @brief uart characteristics */
typedef enum {
#if defined(USART1_BASE)
UART1_INDEX,
#endif
#if defined(USART2_BASE)
UART2_INDEX,
#endif
#if defined(USART3_BASE)
UART3_INDEX,
#endif
#if defined(UART4_BASE) || defined(USART4_BASE)
UART4_INDEX,
#endif
#if defined(UART5_BASE) || defined(USART5_BASE)
UART5_INDEX,
#endif
#if defined(USART6_BASE)
UART6_INDEX,
#endif
#if defined(UART7_BASE) || defined(USART7_BASE)
UART7_INDEX,
#endif
#if defined(UART8_BASE) || defined(USART8_BASE)
UART8_INDEX,
#endif
#if defined(UART9_BASE)
UART9_INDEX,
#endif
#if defined(UART10_BASE) || defined(USART10_BASE)
UART10_INDEX,
#endif
#if defined(USART11_BASE)
UART11_INDEX,
#endif
#if defined(UART12_BASE)
UART12_INDEX,
#endif
#if defined(LPUART1_BASE)
LPUART1_INDEX,
#endif
#if defined(LPUART2_BASE)
LPUART2_INDEX,
#endif
#if defined(LPUART3_BASE)
LPUART3_INDEX,
#endif
UART_NUM
} uart_index_t;
static UART_HandleTypeDef *uart_handlers[UART_NUM] = {NULL};
static serial_t serial_debug = {
.uart = NP,
.pin_tx = NC,
.pin_rx = NC,
.pin_rts = NC,
.pin_cts = NC,
.index = UART_NUM
};
/* Aim of the function is to get serial_s pointer using huart pointer */
/* Highly inspired from magical linux kernel's "container_of" */
serial_t *get_serial_obj(UART_HandleTypeDef *huart)
{
struct serial_s *obj_s;
serial_t *obj;
obj_s = (struct serial_s *)((char *)huart - offsetof(struct serial_s, handle));
obj = (serial_t *)((char *)obj_s - offsetof(serial_t, uart));
return (obj);
}
/**
* @brief Function called to initialize the uart interface
* @param obj : pointer to serial_t structure
* @retval None
*/
void uart_init(serial_t *obj, uint32_t baudrate, uint32_t databits, uint32_t parity, uint32_t stopbits)
{
if (obj == NULL) {
return;
}
UART_HandleTypeDef *huart = &(obj->handle);
/* Determine the U(S)ART peripheral to use (USART1, USART2, ...) */
USART_TypeDef *uart_tx = pinmap_peripheral(obj->pin_tx, PinMap_UART_TX);
USART_TypeDef *uart_rx = pinmap_peripheral(obj->pin_rx, PinMap_UART_RX);
USART_TypeDef *uart_rts = pinmap_peripheral(obj->pin_rts, PinMap_UART_RTS);
USART_TypeDef *uart_cts = pinmap_peripheral(obj->pin_cts, PinMap_UART_CTS);
/* Check if pins are swapped */
#if defined(UART_ADVFEATURE_SWAP_INIT)
USART_TypeDef *uart_tx_swap = pinmap_peripheral(obj->pin_tx, PinMap_UART_RX);
USART_TypeDef *uart_rx_swap = pinmap_peripheral(obj->pin_rx, PinMap_UART_TX);
#else
/* Pin swap not supported */
USART_TypeDef *uart_tx_swap = NP;
USART_TypeDef *uart_rx_swap = NP;
#endif
/* Pin Tx must not be NP */
if ((uart_tx == NP) && (uart_tx_swap == NP)) {
if (obj != &serial_debug) {
core_debug("ERROR: [U(S)ART] Tx pin has no peripheral!\n");
}
return;
}
/* Pin Rx must not be NP if not half-duplex */
if ((obj->pin_rx != NC) && (uart_rx == NP) && (uart_rx_swap == NP)) {
if (obj != &serial_debug) {
core_debug("ERROR: [U(S)ART] Rx pin has no peripheral!\n");
}
return;
}
/* Pin RTS must not be NP if flow control is enabled */
if ((obj->pin_rts != NC) && (uart_rts == NP)) {
if (obj != &serial_debug) {
core_debug("ERROR: [U(S)ART] RTS pin has no peripheral!\n");
}
return;
}
/* Pin CTS must not be NP if flow control is enabled */
if ((obj->pin_cts != NC) && (uart_cts == NP)) {
if (obj != &serial_debug) {
core_debug("ERROR: [U(S)ART] CTS pin has no peripheral!\n");
}
return;
}
/*
* Get the peripheral name (USART1, USART2, ...) from the pin
* and assign it to the object
*/
obj->uart = pinmap_merge_peripheral(uart_tx, uart_rx);
if (obj->uart == NP) {
/* Regular pins not matched, check if they can be swapped */
obj->uart = pinmap_merge_peripheral(uart_tx_swap, uart_rx_swap);
}
/* We also merge RTS/CTS and assert all pins belong to the same instance */
obj->uart = pinmap_merge_peripheral(obj->uart, uart_rts);
obj->uart = pinmap_merge_peripheral(obj->uart, uart_cts);
if (obj->uart == NP) {
if (obj != &serial_debug) {
core_debug("ERROR: [U(S)ART] Rx/Tx/RTS/CTS pins peripherals mismatch!\n");
}
return;
}
/* Enable USART clock */
#if defined(USART1_BASE)
else if (obj->uart == USART1) {
__HAL_RCC_USART1_FORCE_RESET();
__HAL_RCC_USART1_RELEASE_RESET();
__HAL_RCC_USART1_CLK_ENABLE();
obj->index = UART1_INDEX;
obj->irq = USART1_IRQn;
}
#endif
#if defined(USART2_BASE)
else if (obj->uart == USART2) {
__HAL_RCC_USART2_FORCE_RESET();
__HAL_RCC_USART2_RELEASE_RESET();
__HAL_RCC_USART2_CLK_ENABLE();
obj->index = UART2_INDEX;
obj->irq = USART2_IRQn;
}
#endif
#if defined(USART3_BASE)
else if (obj->uart == USART3) {
__HAL_RCC_USART3_FORCE_RESET();
__HAL_RCC_USART3_RELEASE_RESET();
__HAL_RCC_USART3_CLK_ENABLE();
obj->index = UART3_INDEX;
obj->irq = USART3_IRQn;
}
#endif
#if defined(UART4_BASE)
else if (obj->uart == UART4) {
__HAL_RCC_UART4_FORCE_RESET();
__HAL_RCC_UART4_RELEASE_RESET();
__HAL_RCC_UART4_CLK_ENABLE();
obj->index = UART4_INDEX;
obj->irq = UART4_IRQn;
}
#elif defined(USART4_BASE)
else if (obj->uart == USART4) {
__HAL_RCC_USART4_FORCE_RESET();
__HAL_RCC_USART4_RELEASE_RESET();
__HAL_RCC_USART4_CLK_ENABLE();
obj->index = UART4_INDEX;
obj->irq = USART4_IRQn;
}
#endif
#if defined(UART5_BASE)
else if (obj->uart == UART5) {
__HAL_RCC_UART5_FORCE_RESET();
__HAL_RCC_UART5_RELEASE_RESET();
__HAL_RCC_UART5_CLK_ENABLE();
obj->index = UART5_INDEX;
obj->irq = UART5_IRQn;
}
#elif defined(USART5_BASE)
else if (obj->uart == USART5) {
__HAL_RCC_USART5_FORCE_RESET();
__HAL_RCC_USART5_RELEASE_RESET();
__HAL_RCC_USART5_CLK_ENABLE();
obj->index = UART5_INDEX;
obj->irq = USART5_IRQn;
}
#endif
#if defined(USART6_BASE)
else if (obj->uart == USART6) {
__HAL_RCC_USART6_FORCE_RESET();
__HAL_RCC_USART6_RELEASE_RESET();
__HAL_RCC_USART6_CLK_ENABLE();
obj->index = UART6_INDEX;
obj->irq = USART6_IRQn;
}
#endif
#if defined(LPUART1_BASE)
else if (obj->uart == LPUART1) {
__HAL_RCC_LPUART1_FORCE_RESET();
__HAL_RCC_LPUART1_RELEASE_RESET();
__HAL_RCC_LPUART1_CLK_ENABLE();
obj->index = LPUART1_INDEX;
obj->irq = LPUART1_IRQn;
}
#endif
#if defined(LPUART2_BASE)
else if (obj->uart == LPUART2) {
__HAL_RCC_LPUART2_FORCE_RESET();
__HAL_RCC_LPUART2_RELEASE_RESET();
__HAL_RCC_LPUART2_CLK_ENABLE();
obj->index = LPUART2_INDEX;
obj->irq = LPUART2_IRQn;
}
#endif
#if defined(LPUART3_BASE)
else if (obj->uart == LPUART3) {
__HAL_RCC_LPUART3_FORCE_RESET();
__HAL_RCC_LPUART3_RELEASE_RESET();
__HAL_RCC_LPUART3_CLK_ENABLE();
obj->index = LPUART3_INDEX;
obj->irq = LPUART3_IRQn;
}
#endif
#if defined(UART7_BASE)
else if (obj->uart == UART7) {
__HAL_RCC_UART7_FORCE_RESET();
__HAL_RCC_UART7_RELEASE_RESET();
__HAL_RCC_UART7_CLK_ENABLE();
obj->index = UART7_INDEX;
obj->irq = UART7_IRQn;
}
#elif defined(USART7_BASE)
else if (obj->uart == USART7) {
__HAL_RCC_USART7_FORCE_RESET();
__HAL_RCC_USART7_RELEASE_RESET();
__HAL_RCC_USART7_CLK_ENABLE();
obj->index = UART7_INDEX;
obj->irq = USART7_IRQn;
}
#endif
#if defined(UART8_BASE)
else if (obj->uart == UART8) {
__HAL_RCC_UART8_FORCE_RESET();
__HAL_RCC_UART8_RELEASE_RESET();
__HAL_RCC_UART8_CLK_ENABLE();
obj->index = UART8_INDEX;
obj->irq = UART8_IRQn;
}
#elif defined(USART8_BASE)
else if (obj->uart == USART8) {
__HAL_RCC_USART8_FORCE_RESET();
__HAL_RCC_USART8_RELEASE_RESET();
__HAL_RCC_USART8_CLK_ENABLE();
obj->index = UART8_INDEX;
obj->irq = USART8_IRQn;
}
#endif
#if defined(UART9_BASE)
else if (obj->uart == UART9) {
__HAL_RCC_UART9_FORCE_RESET();
__HAL_RCC_UART9_RELEASE_RESET();
__HAL_RCC_UART9_CLK_ENABLE();
obj->index = UART9_INDEX;
obj->irq = UART9_IRQn;
}
#endif
#if defined(UART10_BASE)
else if (obj->uart == UART10) {
__HAL_RCC_UART10_FORCE_RESET();
__HAL_RCC_UART10_RELEASE_RESET();
__HAL_RCC_UART10_CLK_ENABLE();
obj->index = UART10_INDEX;
obj->irq = UART10_IRQn;
}
#endif
#if defined(USART10_BASE)
else if (obj->uart == USART10) {
__HAL_RCC_USART10_FORCE_RESET();
__HAL_RCC_USART10_RELEASE_RESET();
__HAL_RCC_USART10_CLK_ENABLE();
obj->index = UART10_INDEX;
obj->irq = USART10_IRQn;
}
#endif
#if defined(USART11_BASE)
else if (obj->uart == USART11) {
__HAL_RCC_USART11_FORCE_RESET();
__HAL_RCC_USART11_RELEASE_RESET();
__HAL_RCC_USART11_CLK_ENABLE();
obj->index = UART11_INDEX;
obj->irq = USART11_IRQn;
}
#endif
#if defined(UART12_BASE)
else if (obj->uart == UART12) {
__HAL_RCC_UART12_FORCE_RESET();
__HAL_RCC_UART12_RELEASE_RESET();
__HAL_RCC_UART12_CLK_ENABLE();
obj->index = UART12_INDEX;
obj->irq = UART12_IRQn;
}
#endif
/* Configure UART GPIO pins */
#if defined(UART_ADVFEATURE_SWAP_INIT)
uint32_t pin_swap = UART_ADVFEATURE_SWAP_DISABLE;
#endif
if (uart_tx != NP) {
/* Regular GPIO */
pinmap_pinout(obj->pin_tx, PinMap_UART_TX);
if (uart_rx != NP) {
pinmap_pinout(obj->pin_rx, PinMap_UART_RX);
}
}
#if defined(UART_ADVFEATURE_SWAP_INIT)
else if (uart_tx_swap != NP) {
/* Swapped GPIO */
pinmap_pinout(obj->pin_tx, PinMap_UART_RX);
if (uart_rx_swap != NP) {
pinmap_pinout(obj->pin_rx, PinMap_UART_TX);
}
pin_swap = UART_ADVFEATURE_SWAP_ENABLE;
}
#endif
/* Configure flow control */
uint32_t flow_control = UART_HWCONTROL_NONE;
if (uart_rts != NP) {
flow_control |= UART_HWCONTROL_RTS;
pinmap_pinout(obj->pin_rts, PinMap_UART_RTS);
}
if (uart_cts != NP) {
flow_control |= UART_HWCONTROL_CTS;
pinmap_pinout(obj->pin_cts, PinMap_UART_CTS);
}
/* Configure uart */
uart_handlers[obj->index] = huart;
huart->Instance = (USART_TypeDef *)(obj->uart);
huart->Init.BaudRate = baudrate;
huart->Init.WordLength = databits;
huart->Init.StopBits = stopbits;
huart->Init.Parity = parity;
huart->Init.Mode = UART_MODE_TX_RX;
huart->Init.HwFlowCtl = flow_control;
huart->Init.OverSampling = UART_OVERSAMPLING_16;
#if defined(UART_ADVFEATURE_SWAP_INIT)
huart->AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_SWAP_INIT;
huart->AdvancedInit.Swap = pin_swap;
#elif defined(UART_ADVFEATURE_NO_INIT)
huart->AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
#endif
#ifdef UART_ONE_BIT_SAMPLE_DISABLE
huart->Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
#endif
/* Set the NVIC priority for future interrupts */
HAL_NVIC_SetPriority(obj->irq, UART_IRQ_PRIO, UART_IRQ_SUBPRIO);
#if defined(LPUART1_BASE) || defined(LPUART2_BASE)
/*
* Note that LPUART clock source must be in the range
* [3 x baud rate, 4096 x baud rate]
* check Reference Manual
*/
if ((obj->uart == LPUART1)
#if defined(LPUART2_BASE)
|| (obj->uart == LPUART2)
#endif
#if defined(LPUART3_BASE)
|| (obj->uart == LPUART3)
#endif
) {
if (baudrate <= 9600) {
#if defined(USART_CR3_UCESM)
HAL_UARTEx_EnableClockStopMode(huart);
#endif
HAL_UARTEx_EnableStopMode(huart);
} else {
#if defined(USART_CR3_UCESM)
HAL_UARTEx_DisableClockStopMode(huart);
#endif
HAL_UARTEx_DisableStopMode(huart);
}
/* Trying default LPUART clock source */
if ((uart_rx == NP) && (uart_rx_swap == NP)) {
if (HAL_HalfDuplex_Init(huart) == HAL_OK) {
return;
}
} else if (HAL_UART_Init(huart) == HAL_OK) {
return;
}
/* Trying to change LPUART clock source */
/* If baudrate is lower than or equal to 9600 try to change to LSE */
if (baudrate <= 9600) {
/* Enable the clock if not already set by user */
enableClock(LSE_CLOCK);
if (obj->uart == LPUART1) {
__HAL_RCC_LPUART1_CONFIG(RCC_LPUART1CLKSOURCE_LSE);
}
#if defined(LPUART2_BASE)
if (obj->uart == LPUART2) {
__HAL_RCC_LPUART2_CONFIG(RCC_LPUART2CLKSOURCE_LSE);
}
#endif
#if defined(LPUART3_BASE)
if (obj->uart == LPUART3) {
__HAL_RCC_LPUART3_CONFIG(RCC_LPUART3CLKSOURCE_LSE);
}
#endif
if ((uart_rx == NP) && (uart_rx_swap == NP)) {
if (HAL_HalfDuplex_Init(huart) == HAL_OK) {
return;
}
} else if (HAL_UART_Init(huart) == HAL_OK) {
return;
}
}
if (__HAL_RCC_GET_FLAG(RCC_FLAG_HSIRDY)) {
if (obj->uart == LPUART1) {
__HAL_RCC_LPUART1_CONFIG(RCC_LPUART1CLKSOURCE_HSI);
}
#if defined(LPUART2_BASE)
if (obj->uart == LPUART2) {
__HAL_RCC_LPUART2_CONFIG(RCC_LPUART2CLKSOURCE_HSI);
}
#endif
#if defined(LPUART3_BASE)
if (obj->uart == LPUART3) {
__HAL_RCC_LPUART3_CONFIG(RCC_LPUART3CLKSOURCE_HSI);
}
#endif
if ((uart_rx == NP) && (uart_rx_swap == NP)) {
if (HAL_HalfDuplex_Init(huart) == HAL_OK) {
return;
}
} else if (HAL_UART_Init(huart) == HAL_OK) {
return;
}
}
if (obj->uart == LPUART1) {
#if defined(RCC_LPUART1CLKSOURCE_CSI)
__HAL_RCC_LPUART1_CONFIG(RCC_LPUART1CLKSOURCE_CSI);
#elif defined(RCC_LPUART1CLKSOURCE_PCLK1)
__HAL_RCC_LPUART1_CONFIG(RCC_LPUART1CLKSOURCE_PCLK1);
#elif defined(RCC_LPUART1CLKSOURCE_PCLK3)
__HAL_RCC_LPUART1_CONFIG(RCC_LPUART1CLKSOURCE_PCLK3);
#endif
}
#if defined(LPUART2_BASE)
if (obj->uart == LPUART2) {
__HAL_RCC_LPUART2_CONFIG(RCC_LPUART2CLKSOURCE_PCLK1);
}
#endif
#if defined(LPUART3_BASE)
if (obj->uart == LPUART3) {
__HAL_RCC_LPUART3_CONFIG(RCC_LPUART3CLKSOURCE_PCLK1);
}
#endif
if ((uart_rx == NP) && (uart_rx_swap == NP)) {
if (HAL_HalfDuplex_Init(huart) == HAL_OK) {
return;
}
} else if (HAL_UART_Init(huart) == HAL_OK) {
return;
}
#if defined(RCC_LPUART1CLKSOURCE_SYSCLK)
if (obj->uart == LPUART1) {
__HAL_RCC_LPUART1_CONFIG(RCC_LPUART1CLKSOURCE_SYSCLK);
}
#endif
#if defined(LPUART2_BASE)
if (obj->uart == LPUART2) {
__HAL_RCC_LPUART2_CONFIG(RCC_LPUART2CLKSOURCE_SYSCLK);
}
#endif
#if defined(LPUART3_BASE)
if (obj->uart == LPUART3) {
__HAL_RCC_LPUART3_CONFIG(RCC_LPUART3CLKSOURCE_SYSCLK);
}
#endif
}
#endif
if ((uart_rx == NP) && (uart_rx_swap == NP)) {
if (HAL_HalfDuplex_Init(huart) != HAL_OK) {
return;
}
} else if (HAL_UART_Init(huart) != HAL_OK) {
return;
}
}
/**
* @brief Function called to deinitialize the uart interface
* @param obj : pointer to serial_t structure
* @retval None
*/
void uart_deinit(serial_t *obj)
{
/* Reset UART and disable clock */
switch (obj->index) {
#if defined(USART1_BASE)
case UART1_INDEX:
__HAL_RCC_USART1_FORCE_RESET();
__HAL_RCC_USART1_RELEASE_RESET();
__HAL_RCC_USART1_CLK_DISABLE();
break;
#endif
#if defined(USART2_BASE)
case UART2_INDEX:
__HAL_RCC_USART2_FORCE_RESET();
__HAL_RCC_USART2_RELEASE_RESET();
__HAL_RCC_USART2_CLK_DISABLE();
break;
#endif
#if defined(USART3_BASE)
case UART3_INDEX:
__HAL_RCC_USART3_FORCE_RESET();
__HAL_RCC_USART3_RELEASE_RESET();
__HAL_RCC_USART3_CLK_DISABLE();
break;
#endif
#if defined(UART4_BASE)
case UART4_INDEX:
__HAL_RCC_UART4_FORCE_RESET();
__HAL_RCC_UART4_RELEASE_RESET();
__HAL_RCC_UART4_CLK_DISABLE();
break;
#elif defined(USART4_BASE)
case UART4_INDEX:
__HAL_RCC_USART4_FORCE_RESET();
__HAL_RCC_USART4_RELEASE_RESET();
__HAL_RCC_USART4_CLK_DISABLE();
break;
#endif
#if defined(UART5_BASE)
case UART5_INDEX:
__HAL_RCC_UART5_FORCE_RESET();
__HAL_RCC_UART5_RELEASE_RESET();
__HAL_RCC_UART5_CLK_DISABLE();
break;
#elif defined(USART5_BASE)
case UART5_INDEX:
__HAL_RCC_USART5_FORCE_RESET();
__HAL_RCC_USART5_RELEASE_RESET();
__HAL_RCC_USART5_CLK_DISABLE();
break;
#endif
#if defined(USART6_BASE)
case UART6_INDEX:
__HAL_RCC_USART6_FORCE_RESET();
__HAL_RCC_USART6_RELEASE_RESET();
__HAL_RCC_USART6_CLK_DISABLE();
break;
#endif
#if defined(LPUART1_BASE)
case LPUART1_INDEX:
__HAL_RCC_LPUART1_FORCE_RESET();
__HAL_RCC_LPUART1_RELEASE_RESET();
__HAL_RCC_LPUART1_CLK_DISABLE();
break;
#endif
#if defined(LPUART2_BASE)
case LPUART2_INDEX:
__HAL_RCC_LPUART2_FORCE_RESET();
__HAL_RCC_LPUART2_RELEASE_RESET();
__HAL_RCC_LPUART2_CLK_DISABLE();
break;
#endif
#if defined(LPUART3_BASE)
case LPUART3_INDEX:
__HAL_RCC_LPUART3_FORCE_RESET();
__HAL_RCC_LPUART3_RELEASE_RESET();
__HAL_RCC_LPUART3_CLK_DISABLE();
break;
#endif
#if defined(UART7_BASE)
case UART7_INDEX:
__HAL_RCC_UART7_FORCE_RESET();
__HAL_RCC_UART7_RELEASE_RESET();
__HAL_RCC_UART7_CLK_DISABLE();
break;
#elif defined(USART7_BASE)
case UART7_INDEX:
__HAL_RCC_USART7_FORCE_RESET();
__HAL_RCC_USART7_RELEASE_RESET();
__HAL_RCC_USART7_CLK_DISABLE();
break;
#endif
#if defined(UART8_BASE)
case UART8_INDEX:
__HAL_RCC_UART8_FORCE_RESET();
__HAL_RCC_UART8_RELEASE_RESET();
__HAL_RCC_UART8_CLK_DISABLE();
break;
#elif defined(USART8_BASE)
case UART8_INDEX:
__HAL_RCC_USART8_FORCE_RESET();
__HAL_RCC_USART8_RELEASE_RESET();
__HAL_RCC_USART8_CLK_DISABLE();
break;
#endif
#if defined(UART9_BASE)
case UART9_INDEX:
__HAL_RCC_UART9_FORCE_RESET();
__HAL_RCC_UART9_RELEASE_RESET();
__HAL_RCC_UART9_CLK_DISABLE();
break;
#endif
#if defined(UART10_BASE)
case UART10_INDEX:
__HAL_RCC_UART10_FORCE_RESET();
__HAL_RCC_UART10_RELEASE_RESET();
__HAL_RCC_UART10_CLK_DISABLE();
break;
#endif
#if defined(USART10_BASE)
case UART10_INDEX:
__HAL_RCC_USART10_FORCE_RESET();
__HAL_RCC_USART10_RELEASE_RESET();
__HAL_RCC_USART10_CLK_DISABLE();
break;
#endif
#if defined(USART11_BASE)
case UART11_INDEX:
__HAL_RCC_USART11_FORCE_RESET();
__HAL_RCC_USART11_RELEASE_RESET();
__HAL_RCC_USART11_CLK_DISABLE();
break;
#endif
#if defined(UART12_BASE)
case UART12_INDEX:
__HAL_RCC_UART12_FORCE_RESET();
__HAL_RCC_UART12_RELEASE_RESET();
__HAL_RCC_UART12_CLK_DISABLE();
break;
#endif
}
HAL_UART_DeInit(uart_handlers[obj->index]);
/* Release uart debug to ensure init */
if (serial_debug.index == obj->index) {
serial_debug.index = UART_NUM;
}
}
#if defined(HAL_PWR_MODULE_ENABLED) && (defined(UART_IT_WUF) || defined(LPUART1_BASE))
/**
* @brief Function called to configure the uart interface for low power
* @param obj : pointer to serial_t structure
* @retval None
*/
void uart_config_lowpower(serial_t *obj)
{
if (obj == NULL) {
return;
}
/* Ensure HSI clock is enable */
enableClock(HSI_CLOCK);
hsem_lock(CFG_HW_RCC_CRRCR_CCIPR_SEMID, HSEM_LOCK_DEFAULT_RETRY);
/* Configure HSI as source clock for low power wakeup clock */
switch (obj->index) {
#if defined(USART1_BASE)
case UART1_INDEX:
if (__HAL_RCC_GET_USART1_SOURCE() != RCC_USART1CLKSOURCE_HSI) {
__HAL_RCC_USART1_CONFIG(RCC_USART1CLKSOURCE_HSI);
}
break;
#endif
#if defined(USART2_BASE) && defined(__HAL_RCC_USART2_CONFIG)
case UART2_INDEX:
if (__HAL_RCC_GET_USART2_SOURCE() != RCC_USART2CLKSOURCE_HSI) {
__HAL_RCC_USART2_CONFIG(RCC_USART2CLKSOURCE_HSI);
}
break;
#endif
#if defined(USART3_BASE) && defined(__HAL_RCC_USART3_CONFIG)
case UART3_INDEX:
if (__HAL_RCC_GET_USART3_SOURCE() != RCC_USART3CLKSOURCE_HSI) {
__HAL_RCC_USART3_CONFIG(RCC_USART3CLKSOURCE_HSI);
}
break;
#endif
#if defined(UART4_BASE) && defined(__HAL_RCC_UART4_CONFIG)
case UART4_INDEX:
if (__HAL_RCC_GET_UART4_SOURCE() != RCC_UART4CLKSOURCE_HSI) {
__HAL_RCC_UART4_CONFIG(RCC_UART4CLKSOURCE_HSI);
}
break;
#endif
#if defined(UART5_BASE) && defined(__HAL_RCC_UART5_CONFIG)
case UART5_INDEX:
if (__HAL_RCC_GET_UART5_SOURCE() != RCC_UART5CLKSOURCE_HSI) {
__HAL_RCC_UART5_CONFIG(RCC_UART5CLKSOURCE_HSI);
}
break;
#endif
#if defined(LPUART1_BASE) && defined(__HAL_RCC_LPUART1_CONFIG)
case LPUART1_INDEX:
#ifdef __HAL_RCC_LPUART1_CLKAM_ENABLE
__HAL_RCC_LPUART1_CLKAM_ENABLE();
#endif
if (__HAL_RCC_GET_LPUART1_SOURCE() != RCC_LPUART1CLKSOURCE_HSI) {
__HAL_RCC_LPUART1_CONFIG(RCC_LPUART1CLKSOURCE_HSI);
}
break;
#endif
#if defined(LPUART2_BASE) && defined(__HAL_RCC_LPUART2_CONFIG)
case LPUART2_INDEX:
if (__HAL_RCC_GET_LPUART2_SOURCE() != RCC_LPUART2CLKSOURCE_HSI) {
__HAL_RCC_LPUART2_CONFIG(RCC_LPUART2CLKSOURCE_HSI);
}
break;
#endif
#if defined(LPUART3_BASE) && defined(__HAL_RCC_LPUART3_CONFIG)
case LPUART3_INDEX:
if (__HAL_RCC_GET_LPUART3_SOURCE() != RCC_LPUART3CLKSOURCE_HSI) {
__HAL_RCC_LPUART3_CONFIG(RCC_LPUART3CLKSOURCE_HSI);
}
break;
#endif
}
#if defined(UART_WAKEUP_EXTI_LINE)
/* Enable EXTI wakeup interrupt if defined */
LL_EXTI_EnableIT_0_31(UART_WAKEUP_EXTI_LINE);
#endif
hsem_unlock(CFG_HW_RCC_CRRCR_CCIPR_SEMID);
}
#endif
/**
* @brief Function called to initialize the debug uart interface
* @note Call only if debug U(S)ART peripheral is not already initialized
* by a Serial instance
* Default config: 8N1
* @retval None
*/
void uart_debug_init(void)
{
if (DEBUG_UART != NP) {
#if defined(DEBUG_PINNAME_TX)
serial_debug.pin_tx = DEBUG_PINNAME_TX;
#else
serial_debug.pin_tx = pinmap_pin(DEBUG_UART, PinMap_UART_TX);
#endif
/* serial_debug.pin_rx set by default to NC to configure in half duplex mode */
uart_init(&serial_debug, DEBUG_UART_BAUDRATE, UART_WORDLENGTH_8B, UART_PARITY_NONE, UART_STOPBITS_1);
}
}
/**
* @brief write the data on the uart: used by printf for debug only (syscalls)
* @param data : bytes to write
* @param size : number of data to write
* @retval The number of bytes written
*/
size_t uart_debug_write(uint8_t *data, uint32_t size)
{
uint32_t tickstart = HAL_GetTick();
serial_t *obj = NULL;
if (serial_debug.index >= UART_NUM) {
if (DEBUG_UART == NP) {
return 0;
}
/* Search if DEBUG_UART already initialized */
for (serial_debug.index = 0; serial_debug.index < UART_NUM; serial_debug.index++) {
if (uart_handlers[serial_debug.index] != NULL) {
if (DEBUG_UART == uart_handlers[serial_debug.index]->Instance) {
break;
}
}
}
if (serial_debug.index >= UART_NUM) {
/* DEBUG_UART not initialized */
uart_debug_init();
if (serial_debug.index >= UART_NUM) {
return 0;
}
}
}
obj = get_serial_obj(uart_handlers[serial_debug.index]);
if (!obj) {
return 0;
}
while (serial_tx_active(obj)) {
if ((HAL_GetTick() - tickstart) >= TX_TIMEOUT) {
return 0;
}
}
if (HAL_UART_Transmit(&(obj->handle), data, size, TX_TIMEOUT) != HAL_OK) {
size = 0;
}
return size;
}
/**
* Attempts to determine if the serial peripheral is already in use for RX
*
* @param obj The serial object
* @return Non-zero if the RX transaction is ongoing, 0 otherwise
*/
uint8_t serial_rx_active(serial_t *obj)
{
return ((HAL_UART_GetState(uart_handlers[obj->index]) & HAL_UART_STATE_BUSY_RX) == HAL_UART_STATE_BUSY_RX);
}
/**
* Attempts to determine if the serial peripheral is already in use for TX
*
* @param obj The serial object
* @return Non-zero if the TX transaction is ongoing, 0 otherwise
*/
uint8_t serial_tx_active(serial_t *obj)
{
return ((HAL_UART_GetState(uart_handlers[obj->index]) & HAL_UART_STATE_BUSY_TX) == HAL_UART_STATE_BUSY_TX);
}
/**
* @brief Read receive byte from uart
* @param obj : pointer to serial_t structure
* @retval last character received
*/
int uart_getc(serial_t *obj, unsigned char *c)
{
if (obj == NULL) {
return -1;
}
if (serial_rx_active(obj)) {
return -1; /* Transaction ongoing */
}
*c = (unsigned char)(obj->recv);
/* Restart RX irq */
HAL_UART_Receive_IT(uart_handlers[obj->index], &(obj->recv), 1);
return 0;
}
/**
* Begin asynchronous RX transfer (enable interrupt for data collecting)
*
* @param obj : pointer to serial_t structure
* @param callback : function call at the end of reception
* @retval none
*/
void uart_attach_rx_callback(serial_t *obj, void (*callback)(serial_t *))
{
if (obj == NULL) {
return;
}
/* Exit if a reception is already on-going */
if (serial_rx_active(obj)) {
return;
}
obj->rx_callback = callback;
/* Must disable interrupt to prevent handle lock contention */
HAL_NVIC_DisableIRQ(obj->irq);
HAL_UART_Receive_IT(uart_handlers[obj->index], &(obj->recv), 1);
/* Enable interrupt */
HAL_NVIC_EnableIRQ(obj->irq);
}
/**
* Begin asynchronous TX transfer.
*
* @param obj : pointer to serial_t structure
* @param callback : function call at the end of transmission
* @retval none
*/
void uart_attach_tx_callback(serial_t *obj, int (*callback)(serial_t *), size_t size)
{
if (obj == NULL) {
return;
}
obj->tx_callback = callback;
/* Must disable interrupt to prevent handle lock contention */
HAL_NVIC_DisableIRQ(obj->irq);
/* The following function will enable UART_IT_TXE and error interrupts */
HAL_UART_Transmit_IT(uart_handlers[obj->index], &obj->tx_buff[obj->tx_tail], size);
/* Enable interrupt */
HAL_NVIC_EnableIRQ(obj->irq);
}
/**
* Enable transmitter for half-duplex mode. NOOP in full-fuplex mode
*
* @param obj : pointer to serial_t structure
* @retval none
*/
void uart_enable_tx(serial_t *obj)
{
if (obj != NULL && obj->pin_rx == NC) {
HAL_HalfDuplex_EnableTransmitter(uart_handlers[obj->index]);
}
}
/**
* Enable receiver for half-duplex mode. NOOP in full-fuplex mode
*
* @param obj : pointer to serial_t structure
* @retval none
*/
void uart_enable_rx(serial_t *obj)
{
if (obj != NULL && obj->pin_rx == NC) {
HAL_HalfDuplex_EnableReceiver(uart_handlers[obj->index]);
}
}
/**
* @brief Return index of the serial handler
* @param UartHandle pointer on the uart reference
* @retval index
*/
/*
uint8_t uart_index(UART_HandleTypeDef *huart)
{
uint8_t i = 0;
if (huart == NULL) {
return UART_NUM;
}