Zakaria ElQotbi / mbed-src

mbed library sources for airmote

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targets/hal/TARGET_Freescale/TARGET_KLXX/TARGET_KL46Z/serial_api.c@571:1f7ee966c9ea, 2015-06-17 (annotated)

Committer:
mbed_official
Date:
Wed Jun 17 09:00:08 2015 +0100
Revision:
571:1f7ee966c9ea
Parent:
363:12a245e5c745 
Synchronized with git revision b583f22771ff3a95879587f55a8f9392cfac2955



Full URL: https://github.com/mbedmicro/mbed/commit/b583f22771ff3a95879587f55a8f9392cfac2955/



Fix handling of Serial NC pins in K64F,K22F,KL25Z, and KL46Z

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 363:12a245e5c745 1 /* mbed Microcontroller Library
mbed_official 363:12a245e5c745 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 363:12a245e5c745 3 *
mbed_official 363:12a245e5c745 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 363:12a245e5c745 5 * you may not use this file except in compliance with the License.
mbed_official 363:12a245e5c745 6 * You may obtain a copy of the License at
mbed_official 363:12a245e5c745 7 *
mbed_official 363:12a245e5c745 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 363:12a245e5c745 9 *
mbed_official 363:12a245e5c745 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 363:12a245e5c745 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 363:12a245e5c745 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 363:12a245e5c745 13 * See the License for the specific language governing permissions and
mbed_official 363:12a245e5c745 14 * limitations under the License.
mbed_official 363:12a245e5c745 15 */
mbed_official 363:12a245e5c745 16 #include "mbed_assert.h"
mbed_official 363:12a245e5c745 17 #include "serial_api.h"
mbed_official 363:12a245e5c745 18
mbed_official 363:12a245e5c745 19 // math.h required for floating point operations for baud rate calculation
mbed_official 363:12a245e5c745 20 #include <math.h>
mbed_official 363:12a245e5c745 21
mbed_official 363:12a245e5c745 22 #include <string.h>
mbed_official 363:12a245e5c745 23
mbed_official 363:12a245e5c745 24 #include "cmsis.h"
mbed_official 363:12a245e5c745 25 #include "pinmap.h"
mbed_official 363:12a245e5c745 26 #include "clk_freqs.h"
mbed_official 363:12a245e5c745 27 #include "PeripheralPins.h"
mbed_official 363:12a245e5c745 28
mbed_official 363:12a245e5c745 29 //Devices either user UART0 or UARTLP
mbed_official 363:12a245e5c745 30 #ifndef UARTLP_BASES
mbed_official 363:12a245e5c745 31 #define UARTLP_C2_RE_MASK UART0_C2_RE_MASK
mbed_official 363:12a245e5c745 32 #define UARTLP_C2_TE_MASK UART0_C2_TE_MASK
mbed_official 363:12a245e5c745 33 #define UARTLP_BDH_SBNS_MASK UART0_BDH_SBNS_MASK
mbed_official 363:12a245e5c745 34 #define UARTLP_BDH_SBNS_SHIFT UART0_BDH_SBNS_SHIFT
mbed_official 363:12a245e5c745 35 #define UARTLP_S1_TDRE_MASK UART0_S1_TDRE_MASK
mbed_official 571:1f7ee966c9ea 36 #define UARTLP_S1_TC_MASK UART0_S1_TC_MASK
mbed_official 363:12a245e5c745 37 #define UARTLP_S1_OR_MASK UART0_S1_OR_MASK
mbed_official 363:12a245e5c745 38 #define UARTLP_C2_RIE_MASK UART0_C2_RIE_MASK
mbed_official 363:12a245e5c745 39 #define UARTLP_C2_TIE_MASK UART0_C2_TIE_MASK
mbed_official 363:12a245e5c745 40 #define UARTLP_C2_SBK_MASK UART0_C2_SBK_MASK
mbed_official 363:12a245e5c745 41 #define UARTLP_S1_RDRF_MASK UART0_S1_RDRF_MASK
mbed_official 363:12a245e5c745 42 #endif
mbed_official 363:12a245e5c745 43
mbed_official 363:12a245e5c745 44 #ifdef UART2
mbed_official 363:12a245e5c745 45 #define UART_NUM 3
mbed_official 363:12a245e5c745 46 #else
mbed_official 363:12a245e5c745 47 #define UART_NUM 1
mbed_official 363:12a245e5c745 48 #endif
mbed_official 363:12a245e5c745 49
mbed_official 363:12a245e5c745 50 /******************************************************************************
mbed_official 363:12a245e5c745 51 * INITIALIZATION
mbed_official 363:12a245e5c745 52 ******************************************************************************/
mbed_official 363:12a245e5c745 53
mbed_official 363:12a245e5c745 54 static uint32_t serial_irq_ids[UART_NUM] = {0};
mbed_official 363:12a245e5c745 55 static uart_irq_handler irq_handler;
mbed_official 363:12a245e5c745 56
mbed_official 363:12a245e5c745 57 int stdio_uart_inited = 0;
mbed_official 363:12a245e5c745 58 serial_t stdio_uart;
mbed_official 363:12a245e5c745 59
mbed_official 363:12a245e5c745 60 void serial_init(serial_t *obj, PinName tx, PinName rx) {
mbed_official 363:12a245e5c745 61 // determine the UART to use
mbed_official 363:12a245e5c745 62 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
mbed_official 363:12a245e5c745 63 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
mbed_official 363:12a245e5c745 64 UARTName uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
mbed_official 363:12a245e5c745 65 MBED_ASSERT((int)uart != NC);
mbed_official 363:12a245e5c745 66
mbed_official 363:12a245e5c745 67 obj->uart = (UARTLP_Type *)uart;
mbed_official 363:12a245e5c745 68 // enable clk
mbed_official 363:12a245e5c745 69 switch (uart) {
mbed_official 363:12a245e5c745 70 case UART_0: if (mcgpllfll_frequency() != 0) //PLL/FLL is selected
mbed_official 363:12a245e5c745 71 SIM->SOPT2 |= (1<<SIM_SOPT2_UART0SRC_SHIFT);
mbed_official 363:12a245e5c745 72 else
mbed_official 363:12a245e5c745 73 SIM->SOPT2 |= (2<<SIM_SOPT2_UART0SRC_SHIFT);
mbed_official 363:12a245e5c745 74 SIM->SCGC4 |= SIM_SCGC4_UART0_MASK; break;
mbed_official 363:12a245e5c745 75 #if UART_NUM > 1
mbed_official 363:12a245e5c745 76 case UART_1: SIM->SCGC4 |= SIM_SCGC4_UART1_MASK; break;
mbed_official 363:12a245e5c745 77 case UART_2: SIM->SCGC4 |= SIM_SCGC4_UART2_MASK; break;
mbed_official 363:12a245e5c745 78 #endif
mbed_official 363:12a245e5c745 79 }
mbed_official 363:12a245e5c745 80 // Disable UART before changing registers
mbed_official 363:12a245e5c745 81 obj->uart->C2 &= ~(UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK);
mbed_official 571:1f7ee966c9ea 82
mbed_official 571:1f7ee966c9ea 83 // Enable UART transmitter to ensure TX activity is finished
mbed_official 571:1f7ee966c9ea 84 obj->uart->C2 |= UARTLP_C2_TE_MASK;
mbed_official 571:1f7ee966c9ea 85
mbed_official 571:1f7ee966c9ea 86 // Wait for TX activity to finish
mbed_official 571:1f7ee966c9ea 87 while(!(obj->uart->S1 & UARTLP_S1_TC_MASK));
mbed_official 571:1f7ee966c9ea 88
mbed_official 571:1f7ee966c9ea 89 // Disbale UARTs again
mbed_official 571:1f7ee966c9ea 90 obj->uart->C2 &= ~(UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK);
mbed_official 571:1f7ee966c9ea 91
mbed_official 571:1f7ee966c9ea 92
mbed_official 363:12a245e5c745 93 switch (uart) {
mbed_official 363:12a245e5c745 94 case UART_0: obj->index = 0; break;
mbed_official 363:12a245e5c745 95 #if UART_NUM > 1
mbed_official 363:12a245e5c745 96 case UART_1: obj->index = 1; break;
mbed_official 363:12a245e5c745 97 case UART_2: obj->index = 2; break;
mbed_official 363:12a245e5c745 98 #endif
mbed_official 363:12a245e5c745 99 }
mbed_official 363:12a245e5c745 100
mbed_official 363:12a245e5c745 101 // set default baud rate and format
mbed_official 363:12a245e5c745 102 serial_baud (obj, 9600);
mbed_official 363:12a245e5c745 103 serial_format(obj, 8, ParityNone, 1);
mbed_official 363:12a245e5c745 104
mbed_official 363:12a245e5c745 105 // pinout the chosen uart
mbed_official 363:12a245e5c745 106 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 363:12a245e5c745 107 pinmap_pinout(rx, PinMap_UART_RX);
mbed_official 363:12a245e5c745 108
mbed_official 571:1f7ee966c9ea 109 // set rx/tx pins in PullUp mode and enable TX/RX
mbed_official 363:12a245e5c745 110 if (tx != NC) {
mbed_official 571:1f7ee966c9ea 111 obj->uart->C2 |= UARTLP_C2_TE_MASK;
mbed_official 363:12a245e5c745 112 pin_mode(tx, PullUp);
mbed_official 363:12a245e5c745 113 }
mbed_official 363:12a245e5c745 114 if (rx != NC) {
mbed_official 571:1f7ee966c9ea 115 obj->uart->C2 |= UARTLP_C2_RE_MASK;
mbed_official 363:12a245e5c745 116 pin_mode(rx, PullUp);
mbed_official 363:12a245e5c745 117 }
mbed_official 363:12a245e5c745 118
mbed_official 363:12a245e5c745 119 if (uart == STDIO_UART) {
mbed_official 363:12a245e5c745 120 stdio_uart_inited = 1;
mbed_official 363:12a245e5c745 121 memcpy(&stdio_uart, obj, sizeof(serial_t));
mbed_official 363:12a245e5c745 122 }
mbed_official 363:12a245e5c745 123 }
mbed_official 363:12a245e5c745 124
mbed_official 363:12a245e5c745 125 void serial_free(serial_t *obj) {
mbed_official 363:12a245e5c745 126 serial_irq_ids[obj->index] = 0;
mbed_official 363:12a245e5c745 127 }
mbed_official 363:12a245e5c745 128
mbed_official 363:12a245e5c745 129 // serial_baud
mbed_official 363:12a245e5c745 130 //
mbed_official 363:12a245e5c745 131 // set the baud rate, taking in to account the current SystemFrequency
mbed_official 363:12a245e5c745 132 void serial_baud(serial_t *obj, int baudrate) {
mbed_official 571:1f7ee966c9ea 133
mbed_official 363:12a245e5c745 134 // save C2 state
mbed_official 363:12a245e5c745 135 uint8_t c2_state = (obj->uart->C2 & (UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK));
mbed_official 571:1f7ee966c9ea 136
mbed_official 363:12a245e5c745 137 // Disable UART before changing registers
mbed_official 363:12a245e5c745 138 obj->uart->C2 &= ~(UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK);
mbed_official 571:1f7ee966c9ea 139
mbed_official 363:12a245e5c745 140 uint32_t PCLK;
mbed_official 363:12a245e5c745 141 if (obj->uart == UART0) {
mbed_official 363:12a245e5c745 142 if (mcgpllfll_frequency() != 0)
mbed_official 363:12a245e5c745 143 PCLK = mcgpllfll_frequency();
mbed_official 363:12a245e5c745 144 else
mbed_official 363:12a245e5c745 145 PCLK = extosc_frequency();
mbed_official 363:12a245e5c745 146 } else
mbed_official 363:12a245e5c745 147 PCLK = bus_frequency();
mbed_official 363:12a245e5c745 148
mbed_official 363:12a245e5c745 149 // First we check to see if the basic divide with no DivAddVal/MulVal
mbed_official 363:12a245e5c745 150 // ratio gives us an integer result. If it does, we set DivAddVal = 0,
mbed_official 363:12a245e5c745 151 // MulVal = 1. Otherwise, we search the valid ratio value range to find
mbed_official 363:12a245e5c745 152 // the closest match. This could be more elegant, using search methods
mbed_official 363:12a245e5c745 153 // and/or lookup tables, but the brute force method is not that much
mbed_official 363:12a245e5c745 154 // slower, and is more maintainable.
mbed_official 363:12a245e5c745 155 uint16_t DL = PCLK / (16 * baudrate);
mbed_official 363:12a245e5c745 156
mbed_official 363:12a245e5c745 157 // set BDH and BDL
mbed_official 363:12a245e5c745 158 obj->uart->BDH = (obj->uart->BDH & ~(0x1f)) | ((DL >> 8) & 0x1f);
mbed_official 363:12a245e5c745 159 obj->uart->BDL = (obj->uart->BDL & ~(0xff)) | ((DL >> 0) & 0xff);
mbed_official 571:1f7ee966c9ea 160
mbed_official 363:12a245e5c745 161 // restore C2 state
mbed_official 363:12a245e5c745 162 obj->uart->C2 |= c2_state;
mbed_official 363:12a245e5c745 163 }
mbed_official 363:12a245e5c745 164
mbed_official 363:12a245e5c745 165 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
mbed_official 363:12a245e5c745 166 MBED_ASSERT((stop_bits == 1) || (stop_bits == 2));
mbed_official 363:12a245e5c745 167 MBED_ASSERT((parity == ParityNone) || (parity == ParityOdd) || (parity == ParityEven));
mbed_official 363:12a245e5c745 168 MBED_ASSERT(data_bits == 8); // TODO: Support other number of data bits (also in the write method!)
mbed_official 363:12a245e5c745 169
mbed_official 363:12a245e5c745 170 // save C2 state
mbed_official 363:12a245e5c745 171 uint8_t c2_state = (obj->uart->C2 & (UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK));
mbed_official 571:1f7ee966c9ea 172
mbed_official 363:12a245e5c745 173 // Disable UART before changing registers
mbed_official 363:12a245e5c745 174 obj->uart->C2 &= ~(UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK);
mbed_official 571:1f7ee966c9ea 175
mbed_official 363:12a245e5c745 176
mbed_official 363:12a245e5c745 177 uint8_t parity_enable, parity_select;
mbed_official 363:12a245e5c745 178 switch (parity) {
mbed_official 363:12a245e5c745 179 case ParityNone: parity_enable = 0; parity_select = 0; break;
mbed_official 363:12a245e5c745 180 case ParityOdd : parity_enable = 1; parity_select = 1; data_bits++; break;
mbed_official 363:12a245e5c745 181 case ParityEven: parity_enable = 1; parity_select = 0; data_bits++; break;
mbed_official 363:12a245e5c745 182 default:
mbed_official 363:12a245e5c745 183 break;
mbed_official 363:12a245e5c745 184 }
mbed_official 363:12a245e5c745 185
mbed_official 363:12a245e5c745 186 stop_bits -= 1;
mbed_official 363:12a245e5c745 187
mbed_official 363:12a245e5c745 188 // data bits, parity and parity mode
mbed_official 363:12a245e5c745 189 obj->uart->C1 = ((parity_enable << 1)
mbed_official 363:12a245e5c745 190 | (parity_select << 0));
mbed_official 571:1f7ee966c9ea 191
mbed_official 363:12a245e5c745 192 // stop bits
mbed_official 363:12a245e5c745 193 obj->uart->BDH &= ~UARTLP_BDH_SBNS_MASK;
mbed_official 363:12a245e5c745 194 obj->uart->BDH |= (stop_bits << UARTLP_BDH_SBNS_SHIFT);
mbed_official 571:1f7ee966c9ea 195
mbed_official 363:12a245e5c745 196 // restore C2 state
mbed_official 363:12a245e5c745 197 obj->uart->C2 |= c2_state;
mbed_official 363:12a245e5c745 198 }
mbed_official 363:12a245e5c745 199
mbed_official 363:12a245e5c745 200 /******************************************************************************
mbed_official 363:12a245e5c745 201 * INTERRUPTS HANDLING
mbed_official 363:12a245e5c745 202 ******************************************************************************/
mbed_official 363:12a245e5c745 203 static inline void uart_irq(uint8_t status, uint32_t index) {
mbed_official 363:12a245e5c745 204 if (serial_irq_ids[index] != 0) {
mbed_official 363:12a245e5c745 205 if (status & UARTLP_S1_TDRE_MASK)
mbed_official 363:12a245e5c745 206 irq_handler(serial_irq_ids[index], TxIrq);
mbed_official 363:12a245e5c745 207
mbed_official 363:12a245e5c745 208 if (status & UARTLP_S1_RDRF_MASK)
mbed_official 363:12a245e5c745 209 irq_handler(serial_irq_ids[index], RxIrq);
mbed_official 363:12a245e5c745 210 }
mbed_official 363:12a245e5c745 211 }
mbed_official 363:12a245e5c745 212
mbed_official 363:12a245e5c745 213 void uart0_irq() {
mbed_official 363:12a245e5c745 214 uart_irq(UART0->S1, 0);
mbed_official 363:12a245e5c745 215 if (UART0->S1 & UARTLP_S1_OR_MASK)
mbed_official 363:12a245e5c745 216 UART0->S1 |= UARTLP_S1_OR_MASK;
mbed_official 363:12a245e5c745 217 }
mbed_official 363:12a245e5c745 218 #if UART_NUM > 1
mbed_official 363:12a245e5c745 219 void uart1_irq() {uart_irq(UART1->S1, 1);}
mbed_official 363:12a245e5c745 220 void uart2_irq() {uart_irq(UART2->S1, 2);}
mbed_official 363:12a245e5c745 221 #endif
mbed_official 363:12a245e5c745 222
mbed_official 363:12a245e5c745 223 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
mbed_official 363:12a245e5c745 224 irq_handler = handler;
mbed_official 363:12a245e5c745 225 serial_irq_ids[obj->index] = id;
mbed_official 363:12a245e5c745 226 }
mbed_official 363:12a245e5c745 227
mbed_official 363:12a245e5c745 228 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
mbed_official 363:12a245e5c745 229 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 363:12a245e5c745 230 uint32_t vector = 0;
mbed_official 363:12a245e5c745 231 switch ((int)obj->uart) {
mbed_official 363:12a245e5c745 232 case UART_0: irq_n=UART0_IRQn; vector = (uint32_t)&uart0_irq; break;
mbed_official 363:12a245e5c745 233 #if UART_NUM > 1
mbed_official 363:12a245e5c745 234 case UART_1: irq_n=UART1_IRQn; vector = (uint32_t)&uart1_irq; break;
mbed_official 363:12a245e5c745 235 case UART_2: irq_n=UART2_IRQn; vector = (uint32_t)&uart2_irq; break;
mbed_official 363:12a245e5c745 236 #endif
mbed_official 363:12a245e5c745 237 }
mbed_official 363:12a245e5c745 238
mbed_official 363:12a245e5c745 239 if (enable) {
mbed_official 363:12a245e5c745 240 switch (irq) {
mbed_official 363:12a245e5c745 241 case RxIrq: obj->uart->C2 |= (UARTLP_C2_RIE_MASK); break;
mbed_official 363:12a245e5c745 242 case TxIrq: obj->uart->C2 |= (UARTLP_C2_TIE_MASK); break;
mbed_official 363:12a245e5c745 243 }
mbed_official 363:12a245e5c745 244 NVIC_SetVector(irq_n, vector);
mbed_official 363:12a245e5c745 245 NVIC_EnableIRQ(irq_n);
mbed_official 363:12a245e5c745 246
mbed_official 363:12a245e5c745 247 } else { // disable
mbed_official 363:12a245e5c745 248 int all_disabled = 0;
mbed_official 363:12a245e5c745 249 SerialIrq other_irq = (irq == RxIrq) ? (TxIrq) : (RxIrq);
mbed_official 363:12a245e5c745 250 switch (irq) {
mbed_official 363:12a245e5c745 251 case RxIrq: obj->uart->C2 &= ~(UARTLP_C2_RIE_MASK); break;
mbed_official 363:12a245e5c745 252 case TxIrq: obj->uart->C2 &= ~(UARTLP_C2_TIE_MASK); break;
mbed_official 363:12a245e5c745 253 }
mbed_official 363:12a245e5c745 254 switch (other_irq) {
mbed_official 363:12a245e5c745 255 case RxIrq: all_disabled = (obj->uart->C2 & (UARTLP_C2_RIE_MASK)) == 0; break;
mbed_official 363:12a245e5c745 256 case TxIrq: all_disabled = (obj->uart->C2 & (UARTLP_C2_TIE_MASK)) == 0; break;
mbed_official 363:12a245e5c745 257 }
mbed_official 363:12a245e5c745 258 if (all_disabled)
mbed_official 363:12a245e5c745 259 NVIC_DisableIRQ(irq_n);
mbed_official 363:12a245e5c745 260 }
mbed_official 363:12a245e5c745 261 }
mbed_official 363:12a245e5c745 262
mbed_official 363:12a245e5c745 263 /******************************************************************************
mbed_official 363:12a245e5c745 264 * READ/WRITE
mbed_official 363:12a245e5c745 265 ******************************************************************************/
mbed_official 363:12a245e5c745 266 int serial_getc(serial_t *obj) {
mbed_official 363:12a245e5c745 267 while (!serial_readable(obj));
mbed_official 363:12a245e5c745 268 return obj->uart->D;
mbed_official 363:12a245e5c745 269 }
mbed_official 363:12a245e5c745 270
mbed_official 363:12a245e5c745 271 void serial_putc(serial_t *obj, int c) {
mbed_official 363:12a245e5c745 272 while (!serial_writable(obj));
mbed_official 363:12a245e5c745 273 obj->uart->D = c;
mbed_official 363:12a245e5c745 274 }
mbed_official 363:12a245e5c745 275
mbed_official 363:12a245e5c745 276 int serial_readable(serial_t *obj) {
mbed_official 363:12a245e5c745 277 // check overrun
mbed_official 363:12a245e5c745 278 if (obj->uart->S1 & UARTLP_S1_OR_MASK) {
mbed_official 363:12a245e5c745 279 obj->uart->S1 |= UARTLP_S1_OR_MASK;
mbed_official 363:12a245e5c745 280 }
mbed_official 363:12a245e5c745 281 return (obj->uart->S1 & UARTLP_S1_RDRF_MASK);
mbed_official 363:12a245e5c745 282 }
mbed_official 363:12a245e5c745 283
mbed_official 363:12a245e5c745 284 int serial_writable(serial_t *obj) {
mbed_official 363:12a245e5c745 285 // check overrun
mbed_official 363:12a245e5c745 286 if (obj->uart->S1 & UARTLP_S1_OR_MASK) {
mbed_official 363:12a245e5c745 287 obj->uart->S1 |= UARTLP_S1_OR_MASK;
mbed_official 363:12a245e5c745 288 }
mbed_official 363:12a245e5c745 289 return (obj->uart->S1 & UARTLP_S1_TDRE_MASK);
mbed_official 363:12a245e5c745 290 }
mbed_official 363:12a245e5c745 291
mbed_official 363:12a245e5c745 292 void serial_clear(serial_t *obj) {
mbed_official 363:12a245e5c745 293 }
mbed_official 363:12a245e5c745 294
mbed_official 363:12a245e5c745 295 void serial_pinout_tx(PinName tx) {
mbed_official 363:12a245e5c745 296 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 363:12a245e5c745 297 }
mbed_official 363:12a245e5c745 298
mbed_official 363:12a245e5c745 299 void serial_break_set(serial_t *obj) {
mbed_official 363:12a245e5c745 300 obj->uart->C2 |= UARTLP_C2_SBK_MASK;
mbed_official 363:12a245e5c745 301 }
mbed_official 363:12a245e5c745 302
mbed_official 363:12a245e5c745 303 void serial_break_clear(serial_t *obj) {
mbed_official 363:12a245e5c745 304 obj->uart->C2 &= ~UARTLP_C2_SBK_MASK;
mbed_official 363:12a245e5c745 305 }