Andrew SaLoutos / mbed-dev-STM-lean

From Ben Katz mbed-dev library. Removed unnecessary target files to reduce the overall size by a factor of 10 to make it easier to import into the online IDE.

Dependents:   motor_driver motor_driver_screaming_fix

targets/TARGET_STM/serial_api.c@0:083111ae2a11, 2020-11-26 (annotated)

Committer:
saloutos
Date:
Thu Nov 26 04:08:56 2020 +0000
Revision:
0:083111ae2a11
first commit of leaned mbed dev lib

Who changed what in which revision?

UserRevisionLine numberNew contents of line
saloutos 0:083111ae2a11 1 /* mbed Microcontroller Library
saloutos 0:083111ae2a11 2 *******************************************************************************
saloutos 0:083111ae2a11 3 * Copyright (c) 2015, STMicroelectronics
saloutos 0:083111ae2a11 4 * All rights reserved.
saloutos 0:083111ae2a11 5 *
saloutos 0:083111ae2a11 6 * Redistribution and use in source and binary forms, with or without
saloutos 0:083111ae2a11 7 * modification, are permitted provided that the following conditions are met:
saloutos 0:083111ae2a11 8 *
saloutos 0:083111ae2a11 9 * 1. Redistributions of source code must retain the above copyright notice,
saloutos 0:083111ae2a11 10 * this list of conditions and the following disclaimer.
saloutos 0:083111ae2a11 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
saloutos 0:083111ae2a11 12 * this list of conditions and the following disclaimer in the documentation
saloutos 0:083111ae2a11 13 * and/or other materials provided with the distribution.
saloutos 0:083111ae2a11 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
saloutos 0:083111ae2a11 15 * may be used to endorse or promote products derived from this software
saloutos 0:083111ae2a11 16 * without specific prior written permission.
saloutos 0:083111ae2a11 17 *
saloutos 0:083111ae2a11 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
saloutos 0:083111ae2a11 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
saloutos 0:083111ae2a11 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
saloutos 0:083111ae2a11 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
saloutos 0:083111ae2a11 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
saloutos 0:083111ae2a11 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
saloutos 0:083111ae2a11 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
saloutos 0:083111ae2a11 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
saloutos 0:083111ae2a11 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
saloutos 0:083111ae2a11 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
saloutos 0:083111ae2a11 28 *******************************************************************************
saloutos 0:083111ae2a11 29 */
saloutos 0:083111ae2a11 30 #include "mbed_assert.h"
saloutos 0:083111ae2a11 31 #include "mbed_error.h"
saloutos 0:083111ae2a11 32 #include "serial_api.h"
saloutos 0:083111ae2a11 33 #include "serial_api_hal.h"
saloutos 0:083111ae2a11 34 #include "PeripheralPins.h"
saloutos 0:083111ae2a11 35
saloutos 0:083111ae2a11 36 #if DEVICE_SERIAL
saloutos 0:083111ae2a11 37
saloutos 0:083111ae2a11 38 void init_uart(serial_t *obj)
saloutos 0:083111ae2a11 39 {
saloutos 0:083111ae2a11 40 struct serial_s *obj_s = SERIAL_S(obj);
saloutos 0:083111ae2a11 41 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
saloutos 0:083111ae2a11 42 huart->Instance = (USART_TypeDef *)(obj_s->uart);
saloutos 0:083111ae2a11 43
saloutos 0:083111ae2a11 44 huart->Init.BaudRate = obj_s->baudrate;
saloutos 0:083111ae2a11 45 huart->Init.WordLength = obj_s->databits;
saloutos 0:083111ae2a11 46 huart->Init.StopBits = obj_s->stopbits;
saloutos 0:083111ae2a11 47 huart->Init.Parity = obj_s->parity;
saloutos 0:083111ae2a11 48 #if DEVICE_SERIAL_FC
saloutos 0:083111ae2a11 49 huart->Init.HwFlowCtl = obj_s->hw_flow_ctl;
saloutos 0:083111ae2a11 50 #else
saloutos 0:083111ae2a11 51 huart->Init.HwFlowCtl = UART_HWCONTROL_NONE;
saloutos 0:083111ae2a11 52 #endif
saloutos 0:083111ae2a11 53 huart->Init.OverSampling = UART_OVERSAMPLING_16;
saloutos 0:083111ae2a11 54 huart->TxXferCount = 0;
saloutos 0:083111ae2a11 55 huart->TxXferSize = 0;
saloutos 0:083111ae2a11 56 huart->RxXferCount = 0;
saloutos 0:083111ae2a11 57 huart->RxXferSize = 0;
saloutos 0:083111ae2a11 58
saloutos 0:083111ae2a11 59 if (obj_s->pin_rx == NC) {
saloutos 0:083111ae2a11 60 huart->Init.Mode = UART_MODE_TX;
saloutos 0:083111ae2a11 61 } else if (obj_s->pin_tx == NC) {
saloutos 0:083111ae2a11 62 huart->Init.Mode = UART_MODE_RX;
saloutos 0:083111ae2a11 63 } else {
saloutos 0:083111ae2a11 64 huart->Init.Mode = UART_MODE_TX_RX;
saloutos 0:083111ae2a11 65 }
saloutos 0:083111ae2a11 66
saloutos 0:083111ae2a11 67 if (HAL_UART_Init(huart) != HAL_OK) {
saloutos 0:083111ae2a11 68 error("Cannot initialize UART\n");
saloutos 0:083111ae2a11 69 }
saloutos 0:083111ae2a11 70 }
saloutos 0:083111ae2a11 71
saloutos 0:083111ae2a11 72 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits)
saloutos 0:083111ae2a11 73 {
saloutos 0:083111ae2a11 74 struct serial_s *obj_s = SERIAL_S(obj);
saloutos 0:083111ae2a11 75
saloutos 0:083111ae2a11 76 switch (parity) {
saloutos 0:083111ae2a11 77 case ParityOdd:
saloutos 0:083111ae2a11 78 obj_s->parity = UART_PARITY_ODD;
saloutos 0:083111ae2a11 79 break;
saloutos 0:083111ae2a11 80 case ParityEven:
saloutos 0:083111ae2a11 81 obj_s->parity = UART_PARITY_EVEN;
saloutos 0:083111ae2a11 82 break;
saloutos 0:083111ae2a11 83 default: // ParityNone
saloutos 0:083111ae2a11 84 case ParityForced0: // unsupported!
saloutos 0:083111ae2a11 85 case ParityForced1: // unsupported!
saloutos 0:083111ae2a11 86 obj_s->parity = UART_PARITY_NONE;
saloutos 0:083111ae2a11 87 break;
saloutos 0:083111ae2a11 88 }
saloutos 0:083111ae2a11 89
saloutos 0:083111ae2a11 90 switch (data_bits) {
saloutos 0:083111ae2a11 91 case 9:
saloutos 0:083111ae2a11 92 MBED_ASSERT(parity == UART_PARITY_NONE);
saloutos 0:083111ae2a11 93 obj_s->databits = UART_WORDLENGTH_9B;
saloutos 0:083111ae2a11 94 break;
saloutos 0:083111ae2a11 95 default:
saloutos 0:083111ae2a11 96 case 8:
saloutos 0:083111ae2a11 97 if (parity != UART_PARITY_NONE) {
saloutos 0:083111ae2a11 98 obj_s->databits = UART_WORDLENGTH_9B;
saloutos 0:083111ae2a11 99 } else {
saloutos 0:083111ae2a11 100 obj_s->databits = UART_WORDLENGTH_8B;
saloutos 0:083111ae2a11 101 }
saloutos 0:083111ae2a11 102 break;
saloutos 0:083111ae2a11 103 #if defined UART_WORDLENGTH_7B
saloutos 0:083111ae2a11 104 case 7:
saloutos 0:083111ae2a11 105 if (parity != UART_PARITY_NONE) {
saloutos 0:083111ae2a11 106 obj_s->databits = UART_WORDLENGTH_8B;
saloutos 0:083111ae2a11 107 } else {
saloutos 0:083111ae2a11 108 obj_s->databits = UART_WORDLENGTH_7B;
saloutos 0:083111ae2a11 109 }
saloutos 0:083111ae2a11 110 break;
saloutos 0:083111ae2a11 111 #endif
saloutos 0:083111ae2a11 112 }
saloutos 0:083111ae2a11 113
saloutos 0:083111ae2a11 114 if (stop_bits == 2) {
saloutos 0:083111ae2a11 115 obj_s->stopbits = UART_STOPBITS_2;
saloutos 0:083111ae2a11 116 } else {
saloutos 0:083111ae2a11 117 obj_s->stopbits = UART_STOPBITS_1;
saloutos 0:083111ae2a11 118 }
saloutos 0:083111ae2a11 119
saloutos 0:083111ae2a11 120 init_uart(obj);
saloutos 0:083111ae2a11 121 }
saloutos 0:083111ae2a11 122
saloutos 0:083111ae2a11 123 /******************************************************************************
saloutos 0:083111ae2a11 124 * READ/WRITE
saloutos 0:083111ae2a11 125 ******************************************************************************/
saloutos 0:083111ae2a11 126
saloutos 0:083111ae2a11 127 int serial_readable(serial_t *obj)
saloutos 0:083111ae2a11 128 {
saloutos 0:083111ae2a11 129 struct serial_s *obj_s = SERIAL_S(obj);
saloutos 0:083111ae2a11 130 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
saloutos 0:083111ae2a11 131 /* To avoid a target blocking case, let's check for
saloutos 0:083111ae2a11 132 * possible OVERRUN error and discard it
saloutos 0:083111ae2a11 133 */
saloutos 0:083111ae2a11 134 if(__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE)) {
saloutos 0:083111ae2a11 135 __HAL_UART_CLEAR_OREFLAG(huart);
saloutos 0:083111ae2a11 136 }
saloutos 0:083111ae2a11 137 // Check if data is received
saloutos 0:083111ae2a11 138 return (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) ? 1 : 0;
saloutos 0:083111ae2a11 139 }
saloutos 0:083111ae2a11 140
saloutos 0:083111ae2a11 141 int serial_writable(serial_t *obj)
saloutos 0:083111ae2a11 142 {
saloutos 0:083111ae2a11 143 struct serial_s *obj_s = SERIAL_S(obj);
saloutos 0:083111ae2a11 144 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
saloutos 0:083111ae2a11 145
saloutos 0:083111ae2a11 146 // Check if data is transmitted
saloutos 0:083111ae2a11 147 return (__HAL_UART_GET_FLAG(huart, UART_FLAG_TXE) != RESET) ? 1 : 0;
saloutos 0:083111ae2a11 148 }
saloutos 0:083111ae2a11 149
saloutos 0:083111ae2a11 150 void serial_pinout_tx(PinName tx)
saloutos 0:083111ae2a11 151 {
saloutos 0:083111ae2a11 152 pinmap_pinout(tx, PinMap_UART_TX);
saloutos 0:083111ae2a11 153 }
saloutos 0:083111ae2a11 154
saloutos 0:083111ae2a11 155 void serial_break_clear(serial_t *obj)
saloutos 0:083111ae2a11 156 {
saloutos 0:083111ae2a11 157 (void)obj;
saloutos 0:083111ae2a11 158 }
saloutos 0:083111ae2a11 159
saloutos 0:083111ae2a11 160 #endif /* DEVICE_SERIAL */