mbed library sources
Dependents: FRDM-KL46Z_LCD_Test FRDM-KL46Z_LCD_Test FRDM-KL46Z_Plantilla FRDM-KL46Z_Plantilla ... more
targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/serial_api.c@0:6bc4ac881c8e, 2016-07-28 (annotated)
- Committer:
- ebrus
- Date:
- Thu Jul 28 15:56:34 2016 +0000
- Revision:
- 0:6bc4ac881c8e
1;
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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ebrus | 0:6bc4ac881c8e | 1 | /* mbed Microcontroller Library |
ebrus | 0:6bc4ac881c8e | 2 | ******************************************************************************* |
ebrus | 0:6bc4ac881c8e | 3 | * Copyright (c) 2014, STMicroelectronics |
ebrus | 0:6bc4ac881c8e | 4 | * All rights reserved. |
ebrus | 0:6bc4ac881c8e | 5 | * |
ebrus | 0:6bc4ac881c8e | 6 | * Redistribution and use in source and binary forms, with or without |
ebrus | 0:6bc4ac881c8e | 7 | * modification, are permitted provided that the following conditions are met: |
ebrus | 0:6bc4ac881c8e | 8 | * |
ebrus | 0:6bc4ac881c8e | 9 | * 1. Redistributions of source code must retain the above copyright notice, |
ebrus | 0:6bc4ac881c8e | 10 | * this list of conditions and the following disclaimer. |
ebrus | 0:6bc4ac881c8e | 11 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
ebrus | 0:6bc4ac881c8e | 12 | * this list of conditions and the following disclaimer in the documentation |
ebrus | 0:6bc4ac881c8e | 13 | * and/or other materials provided with the distribution. |
ebrus | 0:6bc4ac881c8e | 14 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
ebrus | 0:6bc4ac881c8e | 15 | * may be used to endorse or promote products derived from this software |
ebrus | 0:6bc4ac881c8e | 16 | * without specific prior written permission. |
ebrus | 0:6bc4ac881c8e | 17 | * |
ebrus | 0:6bc4ac881c8e | 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
ebrus | 0:6bc4ac881c8e | 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
ebrus | 0:6bc4ac881c8e | 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
ebrus | 0:6bc4ac881c8e | 21 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
ebrus | 0:6bc4ac881c8e | 22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
ebrus | 0:6bc4ac881c8e | 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
ebrus | 0:6bc4ac881c8e | 24 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
ebrus | 0:6bc4ac881c8e | 25 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
ebrus | 0:6bc4ac881c8e | 26 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
ebrus | 0:6bc4ac881c8e | 27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
ebrus | 0:6bc4ac881c8e | 28 | ******************************************************************************* |
ebrus | 0:6bc4ac881c8e | 29 | */ |
ebrus | 0:6bc4ac881c8e | 30 | #include "mbed_assert.h" |
ebrus | 0:6bc4ac881c8e | 31 | #include "serial_api.h" |
ebrus | 0:6bc4ac881c8e | 32 | |
ebrus | 0:6bc4ac881c8e | 33 | #if DEVICE_SERIAL |
ebrus | 0:6bc4ac881c8e | 34 | |
ebrus | 0:6bc4ac881c8e | 35 | #include "cmsis.h" |
ebrus | 0:6bc4ac881c8e | 36 | #include "pinmap.h" |
ebrus | 0:6bc4ac881c8e | 37 | #include <string.h> |
ebrus | 0:6bc4ac881c8e | 38 | |
ebrus | 0:6bc4ac881c8e | 39 | static const PinMap PinMap_UART_TX[] = { |
ebrus | 0:6bc4ac881c8e | 40 | {PA_2, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, |
ebrus | 0:6bc4ac881c8e | 41 | {PA_9, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, |
ebrus | 0:6bc4ac881c8e | 42 | {PB_6, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_0)}, |
ebrus | 0:6bc4ac881c8e | 43 | {NC, NC, 0} |
ebrus | 0:6bc4ac881c8e | 44 | }; |
ebrus | 0:6bc4ac881c8e | 45 | |
ebrus | 0:6bc4ac881c8e | 46 | static const PinMap PinMap_UART_RX[] = { |
ebrus | 0:6bc4ac881c8e | 47 | {PA_3, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, |
ebrus | 0:6bc4ac881c8e | 48 | {PA_10, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, |
ebrus | 0:6bc4ac881c8e | 49 | {PA_15, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, |
ebrus | 0:6bc4ac881c8e | 50 | {PB_7, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_0)}, |
ebrus | 0:6bc4ac881c8e | 51 | {NC, NC, 0} |
ebrus | 0:6bc4ac881c8e | 52 | }; |
ebrus | 0:6bc4ac881c8e | 53 | |
ebrus | 0:6bc4ac881c8e | 54 | #define UART_NUM (2) |
ebrus | 0:6bc4ac881c8e | 55 | |
ebrus | 0:6bc4ac881c8e | 56 | static uint32_t serial_irq_ids[UART_NUM] = {0}; |
ebrus | 0:6bc4ac881c8e | 57 | |
ebrus | 0:6bc4ac881c8e | 58 | static uart_irq_handler irq_handler; |
ebrus | 0:6bc4ac881c8e | 59 | |
ebrus | 0:6bc4ac881c8e | 60 | int stdio_uart_inited = 0; |
ebrus | 0:6bc4ac881c8e | 61 | serial_t stdio_uart; |
ebrus | 0:6bc4ac881c8e | 62 | |
ebrus | 0:6bc4ac881c8e | 63 | static void init_usart(serial_t *obj) { |
ebrus | 0:6bc4ac881c8e | 64 | USART_TypeDef *usart = (USART_TypeDef *)(obj->uart); |
ebrus | 0:6bc4ac881c8e | 65 | USART_InitTypeDef USART_InitStructure; |
ebrus | 0:6bc4ac881c8e | 66 | |
ebrus | 0:6bc4ac881c8e | 67 | USART_Cmd(usart, DISABLE); |
ebrus | 0:6bc4ac881c8e | 68 | |
ebrus | 0:6bc4ac881c8e | 69 | USART_InitStructure.USART_BaudRate = obj->baudrate; |
ebrus | 0:6bc4ac881c8e | 70 | USART_InitStructure.USART_WordLength = obj->databits; |
ebrus | 0:6bc4ac881c8e | 71 | USART_InitStructure.USART_StopBits = obj->stopbits; |
ebrus | 0:6bc4ac881c8e | 72 | USART_InitStructure.USART_Parity = obj->parity; |
ebrus | 0:6bc4ac881c8e | 73 | USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; |
ebrus | 0:6bc4ac881c8e | 74 | |
ebrus | 0:6bc4ac881c8e | 75 | if (obj->pin_rx == NC) { |
ebrus | 0:6bc4ac881c8e | 76 | USART_InitStructure.USART_Mode = USART_Mode_Tx; |
ebrus | 0:6bc4ac881c8e | 77 | } else if (obj->pin_tx == NC) { |
ebrus | 0:6bc4ac881c8e | 78 | USART_InitStructure.USART_Mode = USART_Mode_Rx; |
ebrus | 0:6bc4ac881c8e | 79 | } else { |
ebrus | 0:6bc4ac881c8e | 80 | USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx; |
ebrus | 0:6bc4ac881c8e | 81 | } |
ebrus | 0:6bc4ac881c8e | 82 | |
ebrus | 0:6bc4ac881c8e | 83 | USART_Init(usart, &USART_InitStructure); |
ebrus | 0:6bc4ac881c8e | 84 | |
ebrus | 0:6bc4ac881c8e | 85 | USART_Cmd(usart, ENABLE); |
ebrus | 0:6bc4ac881c8e | 86 | } |
ebrus | 0:6bc4ac881c8e | 87 | |
ebrus | 0:6bc4ac881c8e | 88 | void serial_init(serial_t *obj, PinName tx, PinName rx) { |
ebrus | 0:6bc4ac881c8e | 89 | // Determine the UART to use (UART_1, UART_2, ...) |
ebrus | 0:6bc4ac881c8e | 90 | UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX); |
ebrus | 0:6bc4ac881c8e | 91 | UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX); |
ebrus | 0:6bc4ac881c8e | 92 | |
ebrus | 0:6bc4ac881c8e | 93 | // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object |
ebrus | 0:6bc4ac881c8e | 94 | obj->uart = (UARTName)pinmap_merge(uart_tx, uart_rx); |
ebrus | 0:6bc4ac881c8e | 95 | MBED_ASSERT(obj->uart != (UARTName)NC); |
ebrus | 0:6bc4ac881c8e | 96 | |
ebrus | 0:6bc4ac881c8e | 97 | // Enable USART clock |
ebrus | 0:6bc4ac881c8e | 98 | if (obj->uart == UART_1) { |
ebrus | 0:6bc4ac881c8e | 99 | RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); |
ebrus | 0:6bc4ac881c8e | 100 | obj->index = 0; |
ebrus | 0:6bc4ac881c8e | 101 | } |
ebrus | 0:6bc4ac881c8e | 102 | if (obj->uart == UART_2) { |
ebrus | 0:6bc4ac881c8e | 103 | RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); |
ebrus | 0:6bc4ac881c8e | 104 | obj->index = 1; |
ebrus | 0:6bc4ac881c8e | 105 | } |
ebrus | 0:6bc4ac881c8e | 106 | |
ebrus | 0:6bc4ac881c8e | 107 | // Configure the UART pins |
ebrus | 0:6bc4ac881c8e | 108 | pinmap_pinout(tx, PinMap_UART_TX); |
ebrus | 0:6bc4ac881c8e | 109 | pinmap_pinout(rx, PinMap_UART_RX); |
ebrus | 0:6bc4ac881c8e | 110 | pin_mode(tx, PullUp); |
ebrus | 0:6bc4ac881c8e | 111 | pin_mode(rx, PullUp); |
ebrus | 0:6bc4ac881c8e | 112 | |
ebrus | 0:6bc4ac881c8e | 113 | // Configure UART |
ebrus | 0:6bc4ac881c8e | 114 | obj->baudrate = 9600; |
ebrus | 0:6bc4ac881c8e | 115 | obj->databits = USART_WordLength_8b; |
ebrus | 0:6bc4ac881c8e | 116 | obj->stopbits = USART_StopBits_1; |
ebrus | 0:6bc4ac881c8e | 117 | obj->parity = USART_Parity_No; |
ebrus | 0:6bc4ac881c8e | 118 | |
ebrus | 0:6bc4ac881c8e | 119 | obj->pin_tx = tx; |
ebrus | 0:6bc4ac881c8e | 120 | obj->pin_rx = rx; |
ebrus | 0:6bc4ac881c8e | 121 | |
ebrus | 0:6bc4ac881c8e | 122 | init_usart(obj); |
ebrus | 0:6bc4ac881c8e | 123 | |
ebrus | 0:6bc4ac881c8e | 124 | // For stdio management |
ebrus | 0:6bc4ac881c8e | 125 | if (obj->uart == STDIO_UART) { |
ebrus | 0:6bc4ac881c8e | 126 | stdio_uart_inited = 1; |
ebrus | 0:6bc4ac881c8e | 127 | memcpy(&stdio_uart, obj, sizeof(serial_t)); |
ebrus | 0:6bc4ac881c8e | 128 | } |
ebrus | 0:6bc4ac881c8e | 129 | |
ebrus | 0:6bc4ac881c8e | 130 | } |
ebrus | 0:6bc4ac881c8e | 131 | |
ebrus | 0:6bc4ac881c8e | 132 | void serial_free(serial_t *obj) { |
ebrus | 0:6bc4ac881c8e | 133 | // Reset UART and disable clock |
ebrus | 0:6bc4ac881c8e | 134 | if (obj->uart == UART_1) { |
ebrus | 0:6bc4ac881c8e | 135 | RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE); |
ebrus | 0:6bc4ac881c8e | 136 | RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, DISABLE); |
ebrus | 0:6bc4ac881c8e | 137 | RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, DISABLE); |
ebrus | 0:6bc4ac881c8e | 138 | } |
ebrus | 0:6bc4ac881c8e | 139 | if (obj->uart == UART_2) { |
ebrus | 0:6bc4ac881c8e | 140 | RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE); |
ebrus | 0:6bc4ac881c8e | 141 | RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, DISABLE); |
ebrus | 0:6bc4ac881c8e | 142 | RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, DISABLE); |
ebrus | 0:6bc4ac881c8e | 143 | } |
ebrus | 0:6bc4ac881c8e | 144 | |
ebrus | 0:6bc4ac881c8e | 145 | // Configure GPIOs |
ebrus | 0:6bc4ac881c8e | 146 | pin_function(obj->pin_tx, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF)); |
ebrus | 0:6bc4ac881c8e | 147 | pin_function(obj->pin_rx, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF)); |
ebrus | 0:6bc4ac881c8e | 148 | |
ebrus | 0:6bc4ac881c8e | 149 | serial_irq_ids[obj->index] = 0; |
ebrus | 0:6bc4ac881c8e | 150 | } |
ebrus | 0:6bc4ac881c8e | 151 | |
ebrus | 0:6bc4ac881c8e | 152 | void serial_baud(serial_t *obj, int baudrate) { |
ebrus | 0:6bc4ac881c8e | 153 | obj->baudrate = baudrate; |
ebrus | 0:6bc4ac881c8e | 154 | init_usart(obj); |
ebrus | 0:6bc4ac881c8e | 155 | } |
ebrus | 0:6bc4ac881c8e | 156 | |
ebrus | 0:6bc4ac881c8e | 157 | void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) { |
ebrus | 0:6bc4ac881c8e | 158 | if (data_bits == 9) { |
ebrus | 0:6bc4ac881c8e | 159 | obj->databits = USART_WordLength_9b; |
ebrus | 0:6bc4ac881c8e | 160 | } else { |
ebrus | 0:6bc4ac881c8e | 161 | obj->databits = USART_WordLength_8b; |
ebrus | 0:6bc4ac881c8e | 162 | } |
ebrus | 0:6bc4ac881c8e | 163 | |
ebrus | 0:6bc4ac881c8e | 164 | switch (parity) { |
ebrus | 0:6bc4ac881c8e | 165 | case ParityOdd: |
ebrus | 0:6bc4ac881c8e | 166 | case ParityForced0: |
ebrus | 0:6bc4ac881c8e | 167 | obj->parity = USART_Parity_Odd; |
ebrus | 0:6bc4ac881c8e | 168 | break; |
ebrus | 0:6bc4ac881c8e | 169 | case ParityEven: |
ebrus | 0:6bc4ac881c8e | 170 | case ParityForced1: |
ebrus | 0:6bc4ac881c8e | 171 | obj->parity = USART_Parity_Even; |
ebrus | 0:6bc4ac881c8e | 172 | break; |
ebrus | 0:6bc4ac881c8e | 173 | default: // ParityNone |
ebrus | 0:6bc4ac881c8e | 174 | obj->parity = USART_Parity_No; |
ebrus | 0:6bc4ac881c8e | 175 | break; |
ebrus | 0:6bc4ac881c8e | 176 | } |
ebrus | 0:6bc4ac881c8e | 177 | |
ebrus | 0:6bc4ac881c8e | 178 | if (stop_bits == 2) { |
ebrus | 0:6bc4ac881c8e | 179 | obj->stopbits = USART_StopBits_2; |
ebrus | 0:6bc4ac881c8e | 180 | } else { |
ebrus | 0:6bc4ac881c8e | 181 | obj->stopbits = USART_StopBits_1; |
ebrus | 0:6bc4ac881c8e | 182 | } |
ebrus | 0:6bc4ac881c8e | 183 | |
ebrus | 0:6bc4ac881c8e | 184 | init_usart(obj); |
ebrus | 0:6bc4ac881c8e | 185 | } |
ebrus | 0:6bc4ac881c8e | 186 | |
ebrus | 0:6bc4ac881c8e | 187 | /****************************************************************************** |
ebrus | 0:6bc4ac881c8e | 188 | * INTERRUPTS HANDLING |
ebrus | 0:6bc4ac881c8e | 189 | ******************************************************************************/ |
ebrus | 0:6bc4ac881c8e | 190 | |
ebrus | 0:6bc4ac881c8e | 191 | // not api |
ebrus | 0:6bc4ac881c8e | 192 | static void uart_irq(USART_TypeDef* usart, int id) { |
ebrus | 0:6bc4ac881c8e | 193 | if (serial_irq_ids[id] != 0) { |
ebrus | 0:6bc4ac881c8e | 194 | if (USART_GetITStatus(usart, USART_IT_TC) != RESET) { |
ebrus | 0:6bc4ac881c8e | 195 | irq_handler(serial_irq_ids[id], TxIrq); |
ebrus | 0:6bc4ac881c8e | 196 | USART_ClearITPendingBit(usart, USART_IT_TC); |
ebrus | 0:6bc4ac881c8e | 197 | } |
ebrus | 0:6bc4ac881c8e | 198 | if (USART_GetITStatus(usart, USART_IT_RXNE) != RESET) { |
ebrus | 0:6bc4ac881c8e | 199 | irq_handler(serial_irq_ids[id], RxIrq); |
ebrus | 0:6bc4ac881c8e | 200 | USART_ClearITPendingBit(usart, USART_IT_RXNE); |
ebrus | 0:6bc4ac881c8e | 201 | } |
ebrus | 0:6bc4ac881c8e | 202 | } |
ebrus | 0:6bc4ac881c8e | 203 | } |
ebrus | 0:6bc4ac881c8e | 204 | |
ebrus | 0:6bc4ac881c8e | 205 | static void uart1_irq(void) { |
ebrus | 0:6bc4ac881c8e | 206 | uart_irq((USART_TypeDef*)UART_1, 0); |
ebrus | 0:6bc4ac881c8e | 207 | } |
ebrus | 0:6bc4ac881c8e | 208 | static void uart2_irq(void) { |
ebrus | 0:6bc4ac881c8e | 209 | uart_irq((USART_TypeDef*)UART_2, 1); |
ebrus | 0:6bc4ac881c8e | 210 | } |
ebrus | 0:6bc4ac881c8e | 211 | |
ebrus | 0:6bc4ac881c8e | 212 | void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) { |
ebrus | 0:6bc4ac881c8e | 213 | irq_handler = handler; |
ebrus | 0:6bc4ac881c8e | 214 | serial_irq_ids[obj->index] = id; |
ebrus | 0:6bc4ac881c8e | 215 | } |
ebrus | 0:6bc4ac881c8e | 216 | |
ebrus | 0:6bc4ac881c8e | 217 | void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) { |
ebrus | 0:6bc4ac881c8e | 218 | IRQn_Type irq_n = (IRQn_Type)0; |
ebrus | 0:6bc4ac881c8e | 219 | uint32_t vector = 0; |
ebrus | 0:6bc4ac881c8e | 220 | USART_TypeDef *usart = (USART_TypeDef *)(obj->uart); |
ebrus | 0:6bc4ac881c8e | 221 | |
ebrus | 0:6bc4ac881c8e | 222 | if (obj->uart == UART_1) { |
ebrus | 0:6bc4ac881c8e | 223 | irq_n = USART1_IRQn; |
ebrus | 0:6bc4ac881c8e | 224 | vector = (uint32_t)&uart1_irq; |
ebrus | 0:6bc4ac881c8e | 225 | } |
ebrus | 0:6bc4ac881c8e | 226 | |
ebrus | 0:6bc4ac881c8e | 227 | if (obj->uart == UART_2) { |
ebrus | 0:6bc4ac881c8e | 228 | irq_n = USART2_IRQn; |
ebrus | 0:6bc4ac881c8e | 229 | vector = (uint32_t)&uart2_irq; |
ebrus | 0:6bc4ac881c8e | 230 | } |
ebrus | 0:6bc4ac881c8e | 231 | |
ebrus | 0:6bc4ac881c8e | 232 | if (enable) { |
ebrus | 0:6bc4ac881c8e | 233 | |
ebrus | 0:6bc4ac881c8e | 234 | if (irq == RxIrq) { |
ebrus | 0:6bc4ac881c8e | 235 | USART_ITConfig(usart, USART_IT_RXNE, ENABLE); |
ebrus | 0:6bc4ac881c8e | 236 | } else { // TxIrq |
ebrus | 0:6bc4ac881c8e | 237 | USART_ITConfig(usart, USART_IT_TC, ENABLE); |
ebrus | 0:6bc4ac881c8e | 238 | } |
ebrus | 0:6bc4ac881c8e | 239 | |
ebrus | 0:6bc4ac881c8e | 240 | NVIC_SetVector(irq_n, vector); |
ebrus | 0:6bc4ac881c8e | 241 | NVIC_EnableIRQ(irq_n); |
ebrus | 0:6bc4ac881c8e | 242 | |
ebrus | 0:6bc4ac881c8e | 243 | } else { // disable |
ebrus | 0:6bc4ac881c8e | 244 | |
ebrus | 0:6bc4ac881c8e | 245 | int all_disabled = 0; |
ebrus | 0:6bc4ac881c8e | 246 | |
ebrus | 0:6bc4ac881c8e | 247 | if (irq == RxIrq) { |
ebrus | 0:6bc4ac881c8e | 248 | USART_ITConfig(usart, USART_IT_RXNE, DISABLE); |
ebrus | 0:6bc4ac881c8e | 249 | // Check if TxIrq is disabled too |
ebrus | 0:6bc4ac881c8e | 250 | if ((usart->CR1 & USART_CR1_TXEIE) == 0) all_disabled = 1; |
ebrus | 0:6bc4ac881c8e | 251 | } else { // TxIrq |
ebrus | 0:6bc4ac881c8e | 252 | USART_ITConfig(usart, USART_IT_TXE, DISABLE); |
ebrus | 0:6bc4ac881c8e | 253 | // Check if RxIrq is disabled too |
ebrus | 0:6bc4ac881c8e | 254 | if ((usart->CR1 & USART_CR1_RXNEIE) == 0) all_disabled = 1; |
ebrus | 0:6bc4ac881c8e | 255 | } |
ebrus | 0:6bc4ac881c8e | 256 | |
ebrus | 0:6bc4ac881c8e | 257 | if (all_disabled) NVIC_DisableIRQ(irq_n); |
ebrus | 0:6bc4ac881c8e | 258 | |
ebrus | 0:6bc4ac881c8e | 259 | } |
ebrus | 0:6bc4ac881c8e | 260 | } |
ebrus | 0:6bc4ac881c8e | 261 | |
ebrus | 0:6bc4ac881c8e | 262 | /****************************************************************************** |
ebrus | 0:6bc4ac881c8e | 263 | * READ/WRITE |
ebrus | 0:6bc4ac881c8e | 264 | ******************************************************************************/ |
ebrus | 0:6bc4ac881c8e | 265 | |
ebrus | 0:6bc4ac881c8e | 266 | int serial_getc(serial_t *obj) { |
ebrus | 0:6bc4ac881c8e | 267 | USART_TypeDef *usart = (USART_TypeDef *)(obj->uart); |
ebrus | 0:6bc4ac881c8e | 268 | while (!serial_readable(obj)); |
ebrus | 0:6bc4ac881c8e | 269 | return (int)(USART_ReceiveData(usart)); |
ebrus | 0:6bc4ac881c8e | 270 | } |
ebrus | 0:6bc4ac881c8e | 271 | |
ebrus | 0:6bc4ac881c8e | 272 | void serial_putc(serial_t *obj, int c) { |
ebrus | 0:6bc4ac881c8e | 273 | USART_TypeDef *usart = (USART_TypeDef *)(obj->uart); |
ebrus | 0:6bc4ac881c8e | 274 | while (!serial_writable(obj)); |
ebrus | 0:6bc4ac881c8e | 275 | USART_SendData(usart, (uint16_t)c); |
ebrus | 0:6bc4ac881c8e | 276 | } |
ebrus | 0:6bc4ac881c8e | 277 | |
ebrus | 0:6bc4ac881c8e | 278 | int serial_readable(serial_t *obj) { |
ebrus | 0:6bc4ac881c8e | 279 | int status; |
ebrus | 0:6bc4ac881c8e | 280 | USART_TypeDef *usart = (USART_TypeDef *)(obj->uart); |
ebrus | 0:6bc4ac881c8e | 281 | // Check if data is received |
ebrus | 0:6bc4ac881c8e | 282 | status = ((USART_GetFlagStatus(usart, USART_FLAG_RXNE) != RESET) ? 1 : 0); |
ebrus | 0:6bc4ac881c8e | 283 | return status; |
ebrus | 0:6bc4ac881c8e | 284 | } |
ebrus | 0:6bc4ac881c8e | 285 | |
ebrus | 0:6bc4ac881c8e | 286 | int serial_writable(serial_t *obj) { |
ebrus | 0:6bc4ac881c8e | 287 | int status; |
ebrus | 0:6bc4ac881c8e | 288 | USART_TypeDef *usart = (USART_TypeDef *)(obj->uart); |
ebrus | 0:6bc4ac881c8e | 289 | // Check if data is transmitted |
ebrus | 0:6bc4ac881c8e | 290 | status = ((USART_GetFlagStatus(usart, USART_FLAG_TXE) != RESET) ? 1 : 0); |
ebrus | 0:6bc4ac881c8e | 291 | return status; |
ebrus | 0:6bc4ac881c8e | 292 | } |
ebrus | 0:6bc4ac881c8e | 293 | |
ebrus | 0:6bc4ac881c8e | 294 | void serial_clear(serial_t *obj) { |
ebrus | 0:6bc4ac881c8e | 295 | USART_TypeDef *usart = (USART_TypeDef *)(obj->uart); |
ebrus | 0:6bc4ac881c8e | 296 | USART_ClearFlag(usart, USART_FLAG_TXE); |
ebrus | 0:6bc4ac881c8e | 297 | USART_ClearFlag(usart, USART_FLAG_RXNE); |
ebrus | 0:6bc4ac881c8e | 298 | } |
ebrus | 0:6bc4ac881c8e | 299 | |
ebrus | 0:6bc4ac881c8e | 300 | void serial_pinout_tx(PinName tx) { |
ebrus | 0:6bc4ac881c8e | 301 | pinmap_pinout(tx, PinMap_UART_TX); |
ebrus | 0:6bc4ac881c8e | 302 | } |
ebrus | 0:6bc4ac881c8e | 303 | |
ebrus | 0:6bc4ac881c8e | 304 | void serial_break_set(serial_t *obj) { |
ebrus | 0:6bc4ac881c8e | 305 | } |
ebrus | 0:6bc4ac881c8e | 306 | |
ebrus | 0:6bc4ac881c8e | 307 | void serial_break_clear(serial_t *obj) { |
ebrus | 0:6bc4ac881c8e | 308 | } |
ebrus | 0:6bc4ac881c8e | 309 | |
ebrus | 0:6bc4ac881c8e | 310 | #endif |