inport from local
Dependents: Hobbyking_Cheetah_0511
targets/TARGET_STM/serial_api.c@0:85b3fd62ea1a, 2020-03-16 (annotated)
- Committer:
- NYX
- Date:
- Mon Mar 16 06:35:48 2020 +0000
- Revision:
- 0:85b3fd62ea1a
reinport to mbed;
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
NYX | 0:85b3fd62ea1a | 1 | /* mbed Microcontroller Library |
NYX | 0:85b3fd62ea1a | 2 | ******************************************************************************* |
NYX | 0:85b3fd62ea1a | 3 | * Copyright (c) 2015, STMicroelectronics |
NYX | 0:85b3fd62ea1a | 4 | * All rights reserved. |
NYX | 0:85b3fd62ea1a | 5 | * |
NYX | 0:85b3fd62ea1a | 6 | * Redistribution and use in source and binary forms, with or without |
NYX | 0:85b3fd62ea1a | 7 | * modification, are permitted provided that the following conditions are met: |
NYX | 0:85b3fd62ea1a | 8 | * |
NYX | 0:85b3fd62ea1a | 9 | * 1. Redistributions of source code must retain the above copyright notice, |
NYX | 0:85b3fd62ea1a | 10 | * this list of conditions and the following disclaimer. |
NYX | 0:85b3fd62ea1a | 11 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
NYX | 0:85b3fd62ea1a | 12 | * this list of conditions and the following disclaimer in the documentation |
NYX | 0:85b3fd62ea1a | 13 | * and/or other materials provided with the distribution. |
NYX | 0:85b3fd62ea1a | 14 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
NYX | 0:85b3fd62ea1a | 15 | * may be used to endorse or promote products derived from this software |
NYX | 0:85b3fd62ea1a | 16 | * without specific prior written permission. |
NYX | 0:85b3fd62ea1a | 17 | * |
NYX | 0:85b3fd62ea1a | 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
NYX | 0:85b3fd62ea1a | 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
NYX | 0:85b3fd62ea1a | 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
NYX | 0:85b3fd62ea1a | 21 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
NYX | 0:85b3fd62ea1a | 22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
NYX | 0:85b3fd62ea1a | 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
NYX | 0:85b3fd62ea1a | 24 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
NYX | 0:85b3fd62ea1a | 25 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
NYX | 0:85b3fd62ea1a | 26 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
NYX | 0:85b3fd62ea1a | 27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
NYX | 0:85b3fd62ea1a | 28 | ******************************************************************************* |
NYX | 0:85b3fd62ea1a | 29 | */ |
NYX | 0:85b3fd62ea1a | 30 | #include "mbed_assert.h" |
NYX | 0:85b3fd62ea1a | 31 | #include "mbed_error.h" |
NYX | 0:85b3fd62ea1a | 32 | #include "serial_api.h" |
NYX | 0:85b3fd62ea1a | 33 | #include "serial_api_hal.h" |
NYX | 0:85b3fd62ea1a | 34 | #include "PeripheralPins.h" |
NYX | 0:85b3fd62ea1a | 35 | |
NYX | 0:85b3fd62ea1a | 36 | #if DEVICE_SERIAL |
NYX | 0:85b3fd62ea1a | 37 | |
NYX | 0:85b3fd62ea1a | 38 | void init_uart(serial_t *obj) |
NYX | 0:85b3fd62ea1a | 39 | { |
NYX | 0:85b3fd62ea1a | 40 | struct serial_s *obj_s = SERIAL_S(obj); |
NYX | 0:85b3fd62ea1a | 41 | UART_HandleTypeDef *huart = &uart_handlers[obj_s->index]; |
NYX | 0:85b3fd62ea1a | 42 | huart->Instance = (USART_TypeDef *)(obj_s->uart); |
NYX | 0:85b3fd62ea1a | 43 | |
NYX | 0:85b3fd62ea1a | 44 | huart->Init.BaudRate = obj_s->baudrate; |
NYX | 0:85b3fd62ea1a | 45 | huart->Init.WordLength = obj_s->databits; |
NYX | 0:85b3fd62ea1a | 46 | huart->Init.StopBits = obj_s->stopbits; |
NYX | 0:85b3fd62ea1a | 47 | huart->Init.Parity = obj_s->parity; |
NYX | 0:85b3fd62ea1a | 48 | #if DEVICE_SERIAL_FC |
NYX | 0:85b3fd62ea1a | 49 | huart->Init.HwFlowCtl = obj_s->hw_flow_ctl; |
NYX | 0:85b3fd62ea1a | 50 | #else |
NYX | 0:85b3fd62ea1a | 51 | huart->Init.HwFlowCtl = UART_HWCONTROL_NONE; |
NYX | 0:85b3fd62ea1a | 52 | #endif |
NYX | 0:85b3fd62ea1a | 53 | huart->Init.OverSampling = UART_OVERSAMPLING_16; |
NYX | 0:85b3fd62ea1a | 54 | huart->TxXferCount = 0; |
NYX | 0:85b3fd62ea1a | 55 | huart->TxXferSize = 0; |
NYX | 0:85b3fd62ea1a | 56 | huart->RxXferCount = 0; |
NYX | 0:85b3fd62ea1a | 57 | huart->RxXferSize = 0; |
NYX | 0:85b3fd62ea1a | 58 | |
NYX | 0:85b3fd62ea1a | 59 | if (obj_s->pin_rx == NC) { |
NYX | 0:85b3fd62ea1a | 60 | huart->Init.Mode = UART_MODE_TX; |
NYX | 0:85b3fd62ea1a | 61 | } else if (obj_s->pin_tx == NC) { |
NYX | 0:85b3fd62ea1a | 62 | huart->Init.Mode = UART_MODE_RX; |
NYX | 0:85b3fd62ea1a | 63 | } else { |
NYX | 0:85b3fd62ea1a | 64 | huart->Init.Mode = UART_MODE_TX_RX; |
NYX | 0:85b3fd62ea1a | 65 | } |
NYX | 0:85b3fd62ea1a | 66 | |
NYX | 0:85b3fd62ea1a | 67 | if (HAL_UART_Init(huart) != HAL_OK) { |
NYX | 0:85b3fd62ea1a | 68 | error("Cannot initialize UART\n"); |
NYX | 0:85b3fd62ea1a | 69 | } |
NYX | 0:85b3fd62ea1a | 70 | } |
NYX | 0:85b3fd62ea1a | 71 | |
NYX | 0:85b3fd62ea1a | 72 | void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) |
NYX | 0:85b3fd62ea1a | 73 | { |
NYX | 0:85b3fd62ea1a | 74 | struct serial_s *obj_s = SERIAL_S(obj); |
NYX | 0:85b3fd62ea1a | 75 | |
NYX | 0:85b3fd62ea1a | 76 | switch (parity) { |
NYX | 0:85b3fd62ea1a | 77 | case ParityOdd: |
NYX | 0:85b3fd62ea1a | 78 | obj_s->parity = UART_PARITY_ODD; |
NYX | 0:85b3fd62ea1a | 79 | break; |
NYX | 0:85b3fd62ea1a | 80 | case ParityEven: |
NYX | 0:85b3fd62ea1a | 81 | obj_s->parity = UART_PARITY_EVEN; |
NYX | 0:85b3fd62ea1a | 82 | break; |
NYX | 0:85b3fd62ea1a | 83 | default: // ParityNone |
NYX | 0:85b3fd62ea1a | 84 | case ParityForced0: // unsupported! |
NYX | 0:85b3fd62ea1a | 85 | case ParityForced1: // unsupported! |
NYX | 0:85b3fd62ea1a | 86 | obj_s->parity = UART_PARITY_NONE; |
NYX | 0:85b3fd62ea1a | 87 | break; |
NYX | 0:85b3fd62ea1a | 88 | } |
NYX | 0:85b3fd62ea1a | 89 | |
NYX | 0:85b3fd62ea1a | 90 | switch (data_bits) { |
NYX | 0:85b3fd62ea1a | 91 | case 9: |
NYX | 0:85b3fd62ea1a | 92 | MBED_ASSERT(parity == UART_PARITY_NONE); |
NYX | 0:85b3fd62ea1a | 93 | obj_s->databits = UART_WORDLENGTH_9B; |
NYX | 0:85b3fd62ea1a | 94 | break; |
NYX | 0:85b3fd62ea1a | 95 | default: |
NYX | 0:85b3fd62ea1a | 96 | case 8: |
NYX | 0:85b3fd62ea1a | 97 | if (parity != UART_PARITY_NONE) { |
NYX | 0:85b3fd62ea1a | 98 | obj_s->databits = UART_WORDLENGTH_9B; |
NYX | 0:85b3fd62ea1a | 99 | } else { |
NYX | 0:85b3fd62ea1a | 100 | obj_s->databits = UART_WORDLENGTH_8B; |
NYX | 0:85b3fd62ea1a | 101 | } |
NYX | 0:85b3fd62ea1a | 102 | break; |
NYX | 0:85b3fd62ea1a | 103 | #if defined UART_WORDLENGTH_7B |
NYX | 0:85b3fd62ea1a | 104 | case 7: |
NYX | 0:85b3fd62ea1a | 105 | if (parity != UART_PARITY_NONE) { |
NYX | 0:85b3fd62ea1a | 106 | obj_s->databits = UART_WORDLENGTH_8B; |
NYX | 0:85b3fd62ea1a | 107 | } else { |
NYX | 0:85b3fd62ea1a | 108 | obj_s->databits = UART_WORDLENGTH_7B; |
NYX | 0:85b3fd62ea1a | 109 | } |
NYX | 0:85b3fd62ea1a | 110 | break; |
NYX | 0:85b3fd62ea1a | 111 | #endif |
NYX | 0:85b3fd62ea1a | 112 | } |
NYX | 0:85b3fd62ea1a | 113 | |
NYX | 0:85b3fd62ea1a | 114 | if (stop_bits == 2) { |
NYX | 0:85b3fd62ea1a | 115 | obj_s->stopbits = UART_STOPBITS_2; |
NYX | 0:85b3fd62ea1a | 116 | } else { |
NYX | 0:85b3fd62ea1a | 117 | obj_s->stopbits = UART_STOPBITS_1; |
NYX | 0:85b3fd62ea1a | 118 | } |
NYX | 0:85b3fd62ea1a | 119 | |
NYX | 0:85b3fd62ea1a | 120 | init_uart(obj); |
NYX | 0:85b3fd62ea1a | 121 | } |
NYX | 0:85b3fd62ea1a | 122 | |
NYX | 0:85b3fd62ea1a | 123 | /****************************************************************************** |
NYX | 0:85b3fd62ea1a | 124 | * READ/WRITE |
NYX | 0:85b3fd62ea1a | 125 | ******************************************************************************/ |
NYX | 0:85b3fd62ea1a | 126 | |
NYX | 0:85b3fd62ea1a | 127 | int serial_readable(serial_t *obj) |
NYX | 0:85b3fd62ea1a | 128 | { |
NYX | 0:85b3fd62ea1a | 129 | struct serial_s *obj_s = SERIAL_S(obj); |
NYX | 0:85b3fd62ea1a | 130 | UART_HandleTypeDef *huart = &uart_handlers[obj_s->index]; |
NYX | 0:85b3fd62ea1a | 131 | /* To avoid a target blocking case, let's check for |
NYX | 0:85b3fd62ea1a | 132 | * possible OVERRUN error and discard it |
NYX | 0:85b3fd62ea1a | 133 | */ |
NYX | 0:85b3fd62ea1a | 134 | if(__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE)) { |
NYX | 0:85b3fd62ea1a | 135 | __HAL_UART_CLEAR_OREFLAG(huart); |
NYX | 0:85b3fd62ea1a | 136 | } |
NYX | 0:85b3fd62ea1a | 137 | // Check if data is received |
NYX | 0:85b3fd62ea1a | 138 | return (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) ? 1 : 0; |
NYX | 0:85b3fd62ea1a | 139 | } |
NYX | 0:85b3fd62ea1a | 140 | |
NYX | 0:85b3fd62ea1a | 141 | int serial_writable(serial_t *obj) |
NYX | 0:85b3fd62ea1a | 142 | { |
NYX | 0:85b3fd62ea1a | 143 | struct serial_s *obj_s = SERIAL_S(obj); |
NYX | 0:85b3fd62ea1a | 144 | UART_HandleTypeDef *huart = &uart_handlers[obj_s->index]; |
NYX | 0:85b3fd62ea1a | 145 | |
NYX | 0:85b3fd62ea1a | 146 | // Check if data is transmitted |
NYX | 0:85b3fd62ea1a | 147 | return (__HAL_UART_GET_FLAG(huart, UART_FLAG_TXE) != RESET) ? 1 : 0; |
NYX | 0:85b3fd62ea1a | 148 | } |
NYX | 0:85b3fd62ea1a | 149 | |
NYX | 0:85b3fd62ea1a | 150 | void serial_pinout_tx(PinName tx) |
NYX | 0:85b3fd62ea1a | 151 | { |
NYX | 0:85b3fd62ea1a | 152 | pinmap_pinout(tx, PinMap_UART_TX); |
NYX | 0:85b3fd62ea1a | 153 | } |
NYX | 0:85b3fd62ea1a | 154 | |
NYX | 0:85b3fd62ea1a | 155 | void serial_break_clear(serial_t *obj) |
NYX | 0:85b3fd62ea1a | 156 | { |
NYX | 0:85b3fd62ea1a | 157 | (void)obj; |
NYX | 0:85b3fd62ea1a | 158 | } |
NYX | 0:85b3fd62ea1a | 159 | |
NYX | 0:85b3fd62ea1a | 160 | #endif /* DEVICE_SERIAL */ |