shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_Freescale/TARGET_KLXX/serial_api.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
227:7bd0639b8911 
test with CLOCK_SETUP = 0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 82:0b31dbcd4769 1 /* mbed Microcontroller Library
mbed_official 82:0b31dbcd4769 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 82:0b31dbcd4769 3 *
mbed_official 82:0b31dbcd4769 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 82:0b31dbcd4769 5 * you may not use this file except in compliance with the License.
mbed_official 82:0b31dbcd4769 6 * You may obtain a copy of the License at
mbed_official 82:0b31dbcd4769 7 *
mbed_official 82:0b31dbcd4769 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 82:0b31dbcd4769 9 *
mbed_official 82:0b31dbcd4769 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 82:0b31dbcd4769 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 82:0b31dbcd4769 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 82:0b31dbcd4769 13 * See the License for the specific language governing permissions and
mbed_official 82:0b31dbcd4769 14 * limitations under the License.
mbed_official 82:0b31dbcd4769 15 */
mbed_official 227:7bd0639b8911 16 #include "mbed_assert.h"
mbed_official 82:0b31dbcd4769 17 #include "serial_api.h"
mbed_official 82:0b31dbcd4769 18
mbed_official 82:0b31dbcd4769 19 // math.h required for floating point operations for baud rate calculation
mbed_official 82:0b31dbcd4769 20 #include <math.h>
mbed_official 82:0b31dbcd4769 21
mbed_official 82:0b31dbcd4769 22 #include <string.h>
mbed_official 82:0b31dbcd4769 23
mbed_official 82:0b31dbcd4769 24 #include "cmsis.h"
mbed_official 82:0b31dbcd4769 25 #include "pinmap.h"
mbed_official 82:0b31dbcd4769 26 #include "clk_freqs.h"
mbed_official 82:0b31dbcd4769 27 #include "PeripheralPins.h"
mbed_official 82:0b31dbcd4769 28
mbed_official 82:0b31dbcd4769 29 //Devices either user UART0 or UARTLP
mbed_official 82:0b31dbcd4769 30 #ifndef UARTLP_BASES
mbed_official 82:0b31dbcd4769 31 #define UARTLP_C2_RE_MASK UART0_C2_RE_MASK
mbed_official 82:0b31dbcd4769 32 #define UARTLP_C2_TE_MASK UART0_C2_TE_MASK
mbed_official 82:0b31dbcd4769 33 #define UARTLP_BDH_SBNS_MASK UART0_BDH_SBNS_MASK
mbed_official 82:0b31dbcd4769 34 #define UARTLP_BDH_SBNS_SHIFT UART0_BDH_SBNS_SHIFT
mbed_official 82:0b31dbcd4769 35 #define UARTLP_S1_TDRE_MASK UART0_S1_TDRE_MASK
mbed_official 82:0b31dbcd4769 36 #define UARTLP_S1_OR_MASK UART0_S1_OR_MASK
mbed_official 82:0b31dbcd4769 37 #define UARTLP_C2_RIE_MASK UART0_C2_RIE_MASK
mbed_official 82:0b31dbcd4769 38 #define UARTLP_C2_TIE_MASK UART0_C2_TIE_MASK
mbed_official 82:0b31dbcd4769 39 #define UARTLP_C2_SBK_MASK UART0_C2_SBK_MASK
mbed_official 82:0b31dbcd4769 40 #define UARTLP_S1_RDRF_MASK UART0_S1_RDRF_MASK
mbed_official 82:0b31dbcd4769 41 #endif
mbed_official 82:0b31dbcd4769 42
mbed_official 82:0b31dbcd4769 43 #ifdef UART2
mbed_official 82:0b31dbcd4769 44 #define UART_NUM 3
mbed_official 82:0b31dbcd4769 45 #else
mbed_official 82:0b31dbcd4769 46 #define UART_NUM 1
mbed_official 82:0b31dbcd4769 47 #endif
mbed_official 82:0b31dbcd4769 48
mbed_official 82:0b31dbcd4769 49 /******************************************************************************
mbed_official 82:0b31dbcd4769 50 * INITIALIZATION
mbed_official 82:0b31dbcd4769 51 ******************************************************************************/
mbed_official 82:0b31dbcd4769 52
mbed_official 82:0b31dbcd4769 53 static uint32_t serial_irq_ids[UART_NUM] = {0};
mbed_official 82:0b31dbcd4769 54 static uart_irq_handler irq_handler;
mbed_official 82:0b31dbcd4769 55
mbed_official 82:0b31dbcd4769 56 int stdio_uart_inited = 0;
mbed_official 82:0b31dbcd4769 57 serial_t stdio_uart;
mbed_official 82:0b31dbcd4769 58
mbed_official 82:0b31dbcd4769 59 void serial_init(serial_t *obj, PinName tx, PinName rx) {
mbed_official 82:0b31dbcd4769 60 // determine the UART to use
mbed_official 82:0b31dbcd4769 61 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
mbed_official 82:0b31dbcd4769 62 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
mbed_official 82:0b31dbcd4769 63 UARTName uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
mbed_official 227:7bd0639b8911 64 MBED_ASSERT((int)uart != NC);
mbed_official 82:0b31dbcd4769 65
mbed_official 82:0b31dbcd4769 66 obj->uart = (UARTLP_Type *)uart;
mbed_official 82:0b31dbcd4769 67 // enable clk
mbed_official 82:0b31dbcd4769 68 switch (uart) {
mbed_official 82:0b31dbcd4769 69 case UART_0: if (mcgpllfll_frequency() != 0) //PLL/FLL is selected
mbed_official 82:0b31dbcd4769 70 SIM->SOPT2 |= (1<<SIM_SOPT2_UART0SRC_SHIFT);
mbed_official 82:0b31dbcd4769 71 else
mbed_official 82:0b31dbcd4769 72 SIM->SOPT2 |= (2<<SIM_SOPT2_UART0SRC_SHIFT);
mbed_official 82:0b31dbcd4769 73 SIM->SCGC4 |= SIM_SCGC4_UART0_MASK; break;
mbed_official 82:0b31dbcd4769 74 #if UART_NUM > 1
mbed_official 82:0b31dbcd4769 75 case UART_1: SIM->SCGC4 |= SIM_SCGC4_UART1_MASK; break;
mbed_official 82:0b31dbcd4769 76 case UART_2: SIM->SCGC4 |= SIM_SCGC4_UART2_MASK; break;
mbed_official 82:0b31dbcd4769 77 #endif
mbed_official 82:0b31dbcd4769 78 }
mbed_official 82:0b31dbcd4769 79 // Disable UART before changing registers
mbed_official 82:0b31dbcd4769 80 obj->uart->C2 &= ~(UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK);
mbed_official 82:0b31dbcd4769 81
mbed_official 82:0b31dbcd4769 82 switch (uart) {
mbed_official 82:0b31dbcd4769 83 case UART_0: obj->index = 0; break;
mbed_official 82:0b31dbcd4769 84 #if UART_NUM > 1
mbed_official 82:0b31dbcd4769 85 case UART_1: obj->index = 1; break;
mbed_official 82:0b31dbcd4769 86 case UART_2: obj->index = 2; break;
mbed_official 82:0b31dbcd4769 87 #endif
mbed_official 82:0b31dbcd4769 88 }
mbed_official 82:0b31dbcd4769 89
mbed_official 82:0b31dbcd4769 90 // set default baud rate and format
mbed_official 82:0b31dbcd4769 91 serial_baud (obj, 9600);
mbed_official 82:0b31dbcd4769 92 serial_format(obj, 8, ParityNone, 1);
mbed_official 82:0b31dbcd4769 93
mbed_official 82:0b31dbcd4769 94 // pinout the chosen uart
mbed_official 82:0b31dbcd4769 95 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 82:0b31dbcd4769 96 pinmap_pinout(rx, PinMap_UART_RX);
mbed_official 82:0b31dbcd4769 97
mbed_official 82:0b31dbcd4769 98 // set rx/tx pins in PullUp mode
mbed_official 82:0b31dbcd4769 99 pin_mode(tx, PullUp);
mbed_official 82:0b31dbcd4769 100 pin_mode(rx, PullUp);
mbed_official 82:0b31dbcd4769 101
mbed_official 82:0b31dbcd4769 102 obj->uart->C2 |= (UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK);
mbed_official 82:0b31dbcd4769 103
mbed_official 82:0b31dbcd4769 104 if (uart == STDIO_UART) {
mbed_official 82:0b31dbcd4769 105 stdio_uart_inited = 1;
mbed_official 82:0b31dbcd4769 106 memcpy(&stdio_uart, obj, sizeof(serial_t));
mbed_official 82:0b31dbcd4769 107 }
mbed_official 82:0b31dbcd4769 108 }
mbed_official 82:0b31dbcd4769 109
mbed_official 82:0b31dbcd4769 110 void serial_free(serial_t *obj) {
mbed_official 82:0b31dbcd4769 111 serial_irq_ids[obj->index] = 0;
mbed_official 82:0b31dbcd4769 112 }
mbed_official 82:0b31dbcd4769 113
mbed_official 82:0b31dbcd4769 114 // serial_baud
mbed_official 82:0b31dbcd4769 115 //
mbed_official 82:0b31dbcd4769 116 // set the baud rate, taking in to account the current SystemFrequency
mbed_official 82:0b31dbcd4769 117 void serial_baud(serial_t *obj, int baudrate) {
mbed_official 82:0b31dbcd4769 118
mbed_official 82:0b31dbcd4769 119 // save C2 state
mbed_official 82:0b31dbcd4769 120 uint8_t c2_state = (obj->uart->C2 & (UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK));
mbed_official 82:0b31dbcd4769 121
mbed_official 82:0b31dbcd4769 122 // Disable UART before changing registers
mbed_official 82:0b31dbcd4769 123 obj->uart->C2 &= ~(UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK);
mbed_official 82:0b31dbcd4769 124
mbed_official 82:0b31dbcd4769 125 uint32_t PCLK;
mbed_official 82:0b31dbcd4769 126 if (obj->uart == UART0) {
mbed_official 82:0b31dbcd4769 127 if (mcgpllfll_frequency() != 0)
mbed_official 82:0b31dbcd4769 128 PCLK = mcgpllfll_frequency();
mbed_official 82:0b31dbcd4769 129 else
mbed_official 82:0b31dbcd4769 130 PCLK = extosc_frequency();
mbed_official 82:0b31dbcd4769 131 } else
mbed_official 82:0b31dbcd4769 132 PCLK = bus_frequency();
mbed_official 82:0b31dbcd4769 133
mbed_official 82:0b31dbcd4769 134 // First we check to see if the basic divide with no DivAddVal/MulVal
mbed_official 82:0b31dbcd4769 135 // ratio gives us an integer result. If it does, we set DivAddVal = 0,
mbed_official 82:0b31dbcd4769 136 // MulVal = 1. Otherwise, we search the valid ratio value range to find
mbed_official 82:0b31dbcd4769 137 // the closest match. This could be more elegant, using search methods
mbed_official 82:0b31dbcd4769 138 // and/or lookup tables, but the brute force method is not that much
mbed_official 82:0b31dbcd4769 139 // slower, and is more maintainable.
mbed_official 82:0b31dbcd4769 140 uint16_t DL = PCLK / (16 * baudrate);
mbed_official 82:0b31dbcd4769 141
mbed_official 82:0b31dbcd4769 142 // set BDH and BDL
mbed_official 82:0b31dbcd4769 143 obj->uart->BDH = (obj->uart->BDH & ~(0x1f)) | ((DL >> 8) & 0x1f);
mbed_official 82:0b31dbcd4769 144 obj->uart->BDL = (obj->uart->BDL & ~(0xff)) | ((DL >> 0) & 0xff);
mbed_official 82:0b31dbcd4769 145
mbed_official 82:0b31dbcd4769 146 // restore C2 state
mbed_official 82:0b31dbcd4769 147 obj->uart->C2 |= c2_state;
mbed_official 82:0b31dbcd4769 148 }
mbed_official 82:0b31dbcd4769 149
mbed_official 82:0b31dbcd4769 150 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
mbed_official 227:7bd0639b8911 151 MBED_ASSERT((stop_bits == 1) || (stop_bits == 2));
mbed_official 227:7bd0639b8911 152 MBED_ASSERT((parity == ParityNone) || (parity == ParityOdd) || (parity == ParityEven));
mbed_official 227:7bd0639b8911 153 MBED_ASSERT(data_bits == 8); // TODO: Support other number of data bits (also in the write method!)
mbed_official 227:7bd0639b8911 154
mbed_official 82:0b31dbcd4769 155 // save C2 state
mbed_official 82:0b31dbcd4769 156 uint8_t c2_state = (obj->uart->C2 & (UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK));
mbed_official 82:0b31dbcd4769 157
mbed_official 82:0b31dbcd4769 158 // Disable UART before changing registers
mbed_official 82:0b31dbcd4769 159 obj->uart->C2 &= ~(UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK);
mbed_official 82:0b31dbcd4769 160
mbed_official 82:0b31dbcd4769 161
mbed_official 82:0b31dbcd4769 162 uint8_t parity_enable, parity_select;
mbed_official 82:0b31dbcd4769 163 switch (parity) {
mbed_official 82:0b31dbcd4769 164 case ParityNone: parity_enable = 0; parity_select = 0; break;
mbed_official 82:0b31dbcd4769 165 case ParityOdd : parity_enable = 1; parity_select = 1; data_bits++; break;
mbed_official 82:0b31dbcd4769 166 case ParityEven: parity_enable = 1; parity_select = 0; data_bits++; break;
mbed_official 82:0b31dbcd4769 167 default:
mbed_official 227:7bd0639b8911 168 break;
mbed_official 82:0b31dbcd4769 169 }
mbed_official 82:0b31dbcd4769 170
mbed_official 82:0b31dbcd4769 171 stop_bits -= 1;
mbed_official 82:0b31dbcd4769 172
mbed_official 82:0b31dbcd4769 173 // data bits, parity and parity mode
mbed_official 82:0b31dbcd4769 174 obj->uart->C1 = ((parity_enable << 1)
mbed_official 82:0b31dbcd4769 175 | (parity_select << 0));
mbed_official 82:0b31dbcd4769 176
mbed_official 82:0b31dbcd4769 177 // stop bits
mbed_official 82:0b31dbcd4769 178 obj->uart->BDH &= ~UARTLP_BDH_SBNS_MASK;
mbed_official 82:0b31dbcd4769 179 obj->uart->BDH |= (stop_bits << UARTLP_BDH_SBNS_SHIFT);
mbed_official 82:0b31dbcd4769 180
mbed_official 82:0b31dbcd4769 181 // restore C2 state
mbed_official 82:0b31dbcd4769 182 obj->uart->C2 |= c2_state;
mbed_official 82:0b31dbcd4769 183 }
mbed_official 82:0b31dbcd4769 184
mbed_official 82:0b31dbcd4769 185 /******************************************************************************
mbed_official 82:0b31dbcd4769 186 * INTERRUPTS HANDLING
mbed_official 82:0b31dbcd4769 187 ******************************************************************************/
mbed_official 82:0b31dbcd4769 188 static inline void uart_irq(uint8_t status, uint32_t index) {
mbed_official 82:0b31dbcd4769 189 if (serial_irq_ids[index] != 0) {
mbed_official 82:0b31dbcd4769 190 if (status & UARTLP_S1_TDRE_MASK)
mbed_official 82:0b31dbcd4769 191 irq_handler(serial_irq_ids[index], TxIrq);
mbed_official 82:0b31dbcd4769 192
mbed_official 82:0b31dbcd4769 193 if (status & UARTLP_S1_RDRF_MASK)
mbed_official 82:0b31dbcd4769 194 irq_handler(serial_irq_ids[index], RxIrq);
mbed_official 82:0b31dbcd4769 195 }
mbed_official 82:0b31dbcd4769 196 }
mbed_official 82:0b31dbcd4769 197
mbed_official 82:0b31dbcd4769 198 void uart0_irq() {
mbed_official 82:0b31dbcd4769 199 uart_irq(UART0->S1, 0);
mbed_official 82:0b31dbcd4769 200 if (UART0->S1 & UARTLP_S1_OR_MASK)
mbed_official 82:0b31dbcd4769 201 UART0->S1 |= UARTLP_S1_OR_MASK;
mbed_official 82:0b31dbcd4769 202 }
mbed_official 82:0b31dbcd4769 203 #if UART_NUM > 1
mbed_official 82:0b31dbcd4769 204 void uart1_irq() {uart_irq(UART1->S1, 1);}
mbed_official 82:0b31dbcd4769 205 void uart2_irq() {uart_irq(UART2->S1, 2);}
mbed_official 82:0b31dbcd4769 206 #endif
mbed_official 82:0b31dbcd4769 207
mbed_official 82:0b31dbcd4769 208 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
mbed_official 82:0b31dbcd4769 209 irq_handler = handler;
mbed_official 82:0b31dbcd4769 210 serial_irq_ids[obj->index] = id;
mbed_official 82:0b31dbcd4769 211 }
mbed_official 82:0b31dbcd4769 212
mbed_official 82:0b31dbcd4769 213 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
mbed_official 82:0b31dbcd4769 214 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 82:0b31dbcd4769 215 uint32_t vector = 0;
mbed_official 82:0b31dbcd4769 216 switch ((int)obj->uart) {
mbed_official 82:0b31dbcd4769 217 case UART_0: irq_n=UART0_IRQn; vector = (uint32_t)&uart0_irq; break;
mbed_official 82:0b31dbcd4769 218 #if UART_NUM > 1
mbed_official 82:0b31dbcd4769 219 case UART_1: irq_n=UART1_IRQn; vector = (uint32_t)&uart1_irq; break;
mbed_official 82:0b31dbcd4769 220 case UART_2: irq_n=UART2_IRQn; vector = (uint32_t)&uart2_irq; break;
mbed_official 82:0b31dbcd4769 221 #endif
mbed_official 82:0b31dbcd4769 222 }
mbed_official 82:0b31dbcd4769 223
mbed_official 82:0b31dbcd4769 224 if (enable) {
mbed_official 82:0b31dbcd4769 225 switch (irq) {
mbed_official 82:0b31dbcd4769 226 case RxIrq: obj->uart->C2 |= (UARTLP_C2_RIE_MASK); break;
mbed_official 82:0b31dbcd4769 227 case TxIrq: obj->uart->C2 |= (UARTLP_C2_TIE_MASK); break;
mbed_official 82:0b31dbcd4769 228 }
mbed_official 82:0b31dbcd4769 229 NVIC_SetVector(irq_n, vector);
mbed_official 82:0b31dbcd4769 230 NVIC_EnableIRQ(irq_n);
mbed_official 82:0b31dbcd4769 231
mbed_official 82:0b31dbcd4769 232 } else { // disable
mbed_official 82:0b31dbcd4769 233 int all_disabled = 0;
mbed_official 82:0b31dbcd4769 234 SerialIrq other_irq = (irq == RxIrq) ? (TxIrq) : (RxIrq);
mbed_official 82:0b31dbcd4769 235 switch (irq) {
mbed_official 82:0b31dbcd4769 236 case RxIrq: obj->uart->C2 &= ~(UARTLP_C2_RIE_MASK); break;
mbed_official 82:0b31dbcd4769 237 case TxIrq: obj->uart->C2 &= ~(UARTLP_C2_TIE_MASK); break;
mbed_official 82:0b31dbcd4769 238 }
mbed_official 82:0b31dbcd4769 239 switch (other_irq) {
mbed_official 82:0b31dbcd4769 240 case RxIrq: all_disabled = (obj->uart->C2 & (UARTLP_C2_RIE_MASK)) == 0; break;
mbed_official 82:0b31dbcd4769 241 case TxIrq: all_disabled = (obj->uart->C2 & (UARTLP_C2_TIE_MASK)) == 0; break;
mbed_official 82:0b31dbcd4769 242 }
mbed_official 82:0b31dbcd4769 243 if (all_disabled)
mbed_official 82:0b31dbcd4769 244 NVIC_DisableIRQ(irq_n);
mbed_official 82:0b31dbcd4769 245 }
mbed_official 82:0b31dbcd4769 246 }
mbed_official 82:0b31dbcd4769 247
mbed_official 82:0b31dbcd4769 248 /******************************************************************************
mbed_official 82:0b31dbcd4769 249 * READ/WRITE
mbed_official 82:0b31dbcd4769 250 ******************************************************************************/
mbed_official 82:0b31dbcd4769 251 int serial_getc(serial_t *obj) {
mbed_official 82:0b31dbcd4769 252 while (!serial_readable(obj));
mbed_official 82:0b31dbcd4769 253 return obj->uart->D;
mbed_official 82:0b31dbcd4769 254 }
mbed_official 82:0b31dbcd4769 255
mbed_official 82:0b31dbcd4769 256 void serial_putc(serial_t *obj, int c) {
mbed_official 82:0b31dbcd4769 257 while (!serial_writable(obj));
mbed_official 82:0b31dbcd4769 258 obj->uart->D = c;
mbed_official 82:0b31dbcd4769 259 }
mbed_official 82:0b31dbcd4769 260
mbed_official 82:0b31dbcd4769 261 int serial_readable(serial_t *obj) {
mbed_official 82:0b31dbcd4769 262 // check overrun
mbed_official 82:0b31dbcd4769 263 if (obj->uart->S1 & UARTLP_S1_OR_MASK) {
mbed_official 82:0b31dbcd4769 264 obj->uart->S1 |= UARTLP_S1_OR_MASK;
mbed_official 82:0b31dbcd4769 265 }
mbed_official 82:0b31dbcd4769 266 return (obj->uart->S1 & UARTLP_S1_RDRF_MASK);
mbed_official 82:0b31dbcd4769 267 }
mbed_official 82:0b31dbcd4769 268
mbed_official 82:0b31dbcd4769 269 int serial_writable(serial_t *obj) {
mbed_official 82:0b31dbcd4769 270 // check overrun
mbed_official 82:0b31dbcd4769 271 if (obj->uart->S1 & UARTLP_S1_OR_MASK) {
mbed_official 82:0b31dbcd4769 272 obj->uart->S1 |= UARTLP_S1_OR_MASK;
mbed_official 82:0b31dbcd4769 273 }
mbed_official 82:0b31dbcd4769 274 return (obj->uart->S1 & UARTLP_S1_TDRE_MASK);
mbed_official 82:0b31dbcd4769 275 }
mbed_official 82:0b31dbcd4769 276
mbed_official 82:0b31dbcd4769 277 void serial_clear(serial_t *obj) {
mbed_official 82:0b31dbcd4769 278 }
mbed_official 82:0b31dbcd4769 279
mbed_official 82:0b31dbcd4769 280 void serial_pinout_tx(PinName tx) {
mbed_official 82:0b31dbcd4769 281 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 82:0b31dbcd4769 282 }
mbed_official 82:0b31dbcd4769 283
mbed_official 82:0b31dbcd4769 284 void serial_break_set(serial_t *obj) {
mbed_official 227:7bd0639b8911 285 obj->uart->C2 |= UARTLP_C2_SBK_MASK;
mbed_official 82:0b31dbcd4769 286 }
mbed_official 82:0b31dbcd4769 287
mbed_official 82:0b31dbcd4769 288 void serial_break_clear(serial_t *obj) {
mbed_official 82:0b31dbcd4769 289 obj->uart->C2 &= ~UARTLP_C2_SBK_MASK;
mbed_official 82:0b31dbcd4769 290 }
mbed_official 82:0b31dbcd4769 291