484 lines
13 KiB
C
484 lines
13 KiB
C
/* mbed Microcontroller Library
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*******************************************************************************
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* Copyright (c) 2015, STMicroelectronics
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*******************************************************************************
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*/
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/*
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Notes for Teacup:
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Copied from $(MBED)/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F4/serial_api.c.
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Used only to get things running quickly. Without serial it's almost
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impossible to see wether code changes work. Should go away soon, because
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all this MBED stuff is too bloated for Teacup's purposes.
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- Prefixed names of #include files with mbed- to match the names of the
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copies in the Teacup repo.
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- Wrapped the whole file in #ifdef __ARMEL__ to not cause conflicts with
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AVR builds.
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- Prefixed function names with mbed_ to not conflict with Teacup names.
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- Fixed mbed_uart0_irq() function prototype.
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*/
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#ifdef __ARM_STM32F411__
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#include "mbed-serial_api.h"
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#if DEVICE_SERIAL
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#include "mbed-cmsis_stm32.h"
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#include "mbed-pinmap.h"
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#include <string.h>
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#include "mbed-PeripheralPins_stm32.h"
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#define UART_NUM (8)
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static uint32_t serial_irq_ids[UART_NUM] = {0, 0, 0, 0, 0, 0, 0, 0};
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static uart_irq_handler irq_handler;
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UART_HandleTypeDef UartHandle;
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int stdio_uart_inited = 0;
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serial_t stdio_uart;
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static void mbed_init_uart(serial_t *obj)
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{
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UartHandle.Instance = (USART_TypeDef *)(obj->uart);
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UartHandle.Init.BaudRate = obj->baudrate;
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UartHandle.Init.WordLength = obj->databits;
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UartHandle.Init.StopBits = obj->stopbits;
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UartHandle.Init.Parity = obj->parity;
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UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
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if (obj->pin_rx == NC) {
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UartHandle.Init.Mode = UART_MODE_TX;
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} else if (obj->pin_tx == NC) {
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UartHandle.Init.Mode = UART_MODE_RX;
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} else {
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UartHandle.Init.Mode = UART_MODE_TX_RX;
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}
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if (HAL_UART_Init(&UartHandle) != HAL_OK) {
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}
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}
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void mbed_serial_init(serial_t *obj, PinName tx, PinName rx)
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{
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// Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
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obj->uart = UART_2;
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// Enable USART clock
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switch (obj->uart) {
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case UART_1:
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__HAL_RCC_USART1_CLK_ENABLE();
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obj->index = 0;
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break;
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case UART_2:
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__HAL_RCC_USART2_CLK_ENABLE();
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obj->index = 1;
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break;
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#if defined(USART3_BASE)
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case UART_3:
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__HAL_RCC_USART3_CLK_ENABLE();
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obj->index = 2;
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break;
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#endif
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#if defined(UART4_BASE)
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case UART_4:
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__HAL_RCC_UART4_CLK_ENABLE();
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obj->index = 3;
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break;
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#endif
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#if defined(UART5_BASE)
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case UART_5:
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__HAL_RCC_UART5_CLK_ENABLE();
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obj->index = 4;
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break;
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#endif
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#if defined(USART6_BASE)
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case UART_6:
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__HAL_RCC_USART6_CLK_ENABLE();
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obj->index = 5;
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break;
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#endif
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#if defined(UART7_BASE)
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case UART_7:
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__HAL_RCC_UART7_CLK_ENABLE();
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obj->index = 6;
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break;
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#endif
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#if defined(UART8_BASE)
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case UART_8:
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__HAL_RCC_UART8_CLK_ENABLE();
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obj->index = 7;
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break;
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#endif
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}
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// Configure the UART pins
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pin_function(tx, 0x393);
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pin_mode(tx, PullUp);
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pin_function(rx, 0x393);
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pin_mode(rx, PullUp);
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// Configure UART
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obj->baudrate = 9600;
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obj->databits = UART_WORDLENGTH_8B;
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obj->stopbits = UART_STOPBITS_1;
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obj->parity = UART_PARITY_NONE;
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obj->pin_tx = tx;
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obj->pin_rx = rx;
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mbed_init_uart(obj);
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// For stdio management
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if (obj->uart == STDIO_UART) {
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stdio_uart_inited = 1;
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memcpy(&stdio_uart, obj, sizeof(serial_t));
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}
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}
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void mbed_serial_free(serial_t *obj)
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{
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// Reset UART and disable clock
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switch (obj->uart) {
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case UART_1:
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__USART1_FORCE_RESET();
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__USART1_RELEASE_RESET();
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__USART1_CLK_DISABLE();
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break;
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case UART_2:
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__USART2_FORCE_RESET();
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__USART2_RELEASE_RESET();
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__USART2_CLK_DISABLE();
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break;
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#if defined(USART3_BASE)
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case UART_3:
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__USART3_FORCE_RESET();
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__USART3_RELEASE_RESET();
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__USART3_CLK_DISABLE();
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break;
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#endif
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#if defined(UART4_BASE)
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case UART_4:
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__UART4_FORCE_RESET();
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__UART4_RELEASE_RESET();
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__UART4_CLK_DISABLE();
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break;
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#endif
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#if defined(UART5_BASE)
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case UART_5:
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__UART5_FORCE_RESET();
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__UART5_RELEASE_RESET();
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__UART5_CLK_DISABLE();
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break;
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#endif
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#if defined(USART6_BASE)
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case UART_6:
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__USART6_FORCE_RESET();
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__USART6_RELEASE_RESET();
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__USART6_CLK_DISABLE();
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break;
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#endif
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#if defined(UART7_BASE)
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case UART_7:
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__UART7_FORCE_RESET();
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__UART7_RELEASE_RESET();
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__UART7_CLK_DISABLE();
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break;
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#endif
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#if defined(UART8_BASE)
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case UART_8:
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__UART8_FORCE_RESET();
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__UART8_RELEASE_RESET();
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__UART8_CLK_DISABLE();
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break;
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#endif
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}
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// Configure GPIOs
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pin_function(obj->pin_tx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
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pin_function(obj->pin_rx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
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serial_irq_ids[obj->index] = 0;
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}
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void mbed_serial_baud(serial_t *obj, int baudrate)
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{
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obj->baudrate = baudrate;
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mbed_init_uart(obj);
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}
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void mbed_serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits)
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{
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if (data_bits == 9) {
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obj->databits = UART_WORDLENGTH_9B;
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} else {
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obj->databits = UART_WORDLENGTH_8B;
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}
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switch (parity) {
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case ParityOdd:
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case ParityForced0:
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obj->parity = UART_PARITY_ODD;
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break;
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case ParityEven:
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case ParityForced1:
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obj->parity = UART_PARITY_EVEN;
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break;
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default: // ParityNone
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obj->parity = UART_PARITY_NONE;
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break;
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}
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if (stop_bits == 2) {
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obj->stopbits = UART_STOPBITS_2;
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} else {
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obj->stopbits = UART_STOPBITS_1;
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}
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mbed_init_uart(obj);
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}
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/******************************************************************************
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* INTERRUPTS HANDLING
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******************************************************************************/
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static void mbed_uart_irq(UARTName name, int id)
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{
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UartHandle.Instance = (USART_TypeDef *)name;
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if (serial_irq_ids[id] != 0) {
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if (__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_TC) != RESET) {
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irq_handler(serial_irq_ids[id], TxIrq);
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__HAL_UART_CLEAR_FLAG(&UartHandle, UART_FLAG_TC);
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}
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if (__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_RXNE) != RESET) {
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irq_handler(serial_irq_ids[id], RxIrq);
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__HAL_UART_CLEAR_FLAG(&UartHandle, UART_FLAG_RXNE);
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}
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}
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}
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static void mbed_uart1_irq(void)
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{
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mbed_uart_irq(UART_1, 0);
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}
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static void mbed_uart2_irq(void)
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{
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mbed_uart_irq(UART_2, 1);
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}
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#if defined(USART3_BASE)
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static void mbed_uart3_irq(void)
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{
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mbed_uart_irq(UART_3, 2);
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}
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#endif
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#if defined(UART4_BASE)
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static void mbed_uart4_irq(void)
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{
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mbed_uart_irq(UART_4, 3);
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}
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#endif
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#if defined(UART5_BASE)
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static void mbed_uart5_irq(void)
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{
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mbed_uart_irq(UART_5, 4);
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}
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#endif
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#if defined(USART6_BASE)
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static void mbed_uart6_irq(void)
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{
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mbed_uart_irq(UART_6, 5);
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}
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#endif
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#if defined(UART7_BASE)
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static void mbed_uart7_irq(void)
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{
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mbed_uart_irq(UART_7, 6);
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}
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#endif
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#if defined(UART8_BASE)
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static void mbed_uart8_irq(void)
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{
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mbed_uart_irq(UART_8, 7);
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}
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#endif
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void mbed_serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
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{
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irq_handler = handler;
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serial_irq_ids[obj->index] = id;
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}
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void mbed_serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
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{
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IRQn_Type irq_n = (IRQn_Type)0;
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uint32_t vector = 0;
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UartHandle.Instance = (USART_TypeDef *)(obj->uart);
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switch (obj->uart) {
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case UART_1:
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irq_n = USART1_IRQn;
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vector = (uint32_t)&mbed_uart1_irq;
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break;
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case UART_2:
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irq_n = USART2_IRQn;
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vector = (uint32_t)&mbed_uart2_irq;
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break;
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#if defined(USART3_BASE)
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case UART_3:
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irq_n = USART3_IRQn;
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vector = (uint32_t)&mbed_uart3_irq;
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break;
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#endif
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#if defined(UART4_BASE)
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case UART_4:
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irq_n = UART4_IRQn;
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vector = (uint32_t)&mbed_uart4_irq;
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break;
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#endif
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#if defined(UART5_BASE)
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case UART_5:
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irq_n = UART5_IRQn;
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vector = (uint32_t)&mbed_uart5_irq;
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break;
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#endif
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#if defined(USART6_BASE)
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case UART_6:
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irq_n = USART6_IRQn;
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vector = (uint32_t)&mbed_uart6_irq;
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break;
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#endif
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#if defined(UART7_BASE)
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case UART_7:
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irq_n = UART7_IRQn;
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vector = (uint32_t)&mbed_uart7_irq;
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break;
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#endif
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#if defined(UART8_BASE)
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case UART_8:
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irq_n = UART8_IRQn;
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vector = (uint32_t)&mbed_uart8_irq;
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break;
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#endif
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}
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if (enable) {
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if (irq == RxIrq) {
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__HAL_UART_ENABLE_IT(&UartHandle, UART_IT_RXNE);
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} else { // TxIrq
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__HAL_UART_ENABLE_IT(&UartHandle, UART_IT_TC);
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}
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NVIC_SetVector(irq_n, vector);
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NVIC_EnableIRQ(irq_n);
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} else { // disable
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int all_disabled = 0;
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if (irq == RxIrq) {
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__HAL_UART_DISABLE_IT(&UartHandle, UART_IT_RXNE);
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// Check if TxIrq is disabled too
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if ((UartHandle.Instance->CR1 & USART_CR1_TXEIE) == 0) all_disabled = 1;
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} else { // TxIrq
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__HAL_UART_DISABLE_IT(&UartHandle, UART_IT_TXE);
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// Check if RxIrq is disabled too
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if ((UartHandle.Instance->CR1 & USART_CR1_RXNEIE) == 0) all_disabled = 1;
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}
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if (all_disabled) NVIC_DisableIRQ(irq_n);
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}
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}
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/******************************************************************************
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* READ/WRITE
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******************************************************************************/
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int mbed_serial_getc(serial_t *obj)
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{
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USART_TypeDef *uart = (USART_TypeDef *)(obj->uart);
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while (!mbed_serial_readable(obj));
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return (int)(uart->DR & 0x1FF);
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}
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void mbed_serial_putc(serial_t *obj, int c)
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{
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USART_TypeDef *uart = (USART_TypeDef *)(obj->uart);
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while (!mbed_serial_writable(obj));
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uart->DR = (uint32_t)(c & 0x1FF);
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}
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int mbed_serial_readable(serial_t *obj)
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{
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int status;
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UartHandle.Instance = (USART_TypeDef *)(obj->uart);
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// Check if data is received
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status = ((__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_RXNE) != RESET) ? 1 : 0);
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return status;
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}
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int mbed_serial_writable(serial_t *obj)
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{
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int status;
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UartHandle.Instance = (USART_TypeDef *)(obj->uart);
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// Check if data is transmitted
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status = ((__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_TXE) != RESET) ? 1 : 0);
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return status;
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}
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void mbed_serial_clear(serial_t *obj)
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{
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UartHandle.Instance = (USART_TypeDef *)(obj->uart);
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__HAL_UART_CLEAR_FLAG(&UartHandle, UART_FLAG_TXE);
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__HAL_UART_CLEAR_FLAG(&UartHandle, UART_FLAG_RXNE);
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}
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void mbed_serial_break_set(serial_t *obj)
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{
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UartHandle.Instance = (USART_TypeDef *)(obj->uart);
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HAL_LIN_SendBreak(&UartHandle);
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}
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void mbed_serial_break_clear(serial_t *obj)
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{
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}
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#endif /* DEVICE_SERIAL */
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#endif /* __ARM_STM32F411__ */
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