Zakaria ElQotbi / mbed-src

mbed library sources for airmote

Fork of mbed-src by mbed official

targets/hal/TARGET_Freescale/TARGET_KLXX/TARGET_KL26Z/serial_api.c@585:a1ed5b41f74f, 2015-07-08 (annotated)

Committer:
mbed_official
Date:
Wed Jul 08 14:45:08 2015 +0100
Revision:
585:a1ed5b41f74f
Synchronized with git revision 7a2b57896e0263b82f31ddc5a0ad2443615db184



Full URL: https://github.com/mbedmicro/mbed/commit/7a2b57896e0263b82f31ddc5a0ad2443615db184/



Add rtc_api.c

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 585:a1ed5b41f74f 1 /* mbed Microcontroller Library
mbed_official 585:a1ed5b41f74f 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 585:a1ed5b41f74f 3 *
mbed_official 585:a1ed5b41f74f 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 585:a1ed5b41f74f 5 * you may not use this file except in compliance with the License.
mbed_official 585:a1ed5b41f74f 6 * You may obtain a copy of the License at
mbed_official 585:a1ed5b41f74f 7 *
mbed_official 585:a1ed5b41f74f 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 585:a1ed5b41f74f 9 *
mbed_official 585:a1ed5b41f74f 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 585:a1ed5b41f74f 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 585:a1ed5b41f74f 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 585:a1ed5b41f74f 13 * See the License for the specific language governing permissions and
mbed_official 585:a1ed5b41f74f 14 * limitations under the License.
mbed_official 585:a1ed5b41f74f 15 */
mbed_official 585:a1ed5b41f74f 16 #include "mbed_assert.h"
mbed_official 585:a1ed5b41f74f 17 #include "serial_api.h"
mbed_official 585:a1ed5b41f74f 18
mbed_official 585:a1ed5b41f74f 19 // math.h required for floating point operations for baud rate calculation
mbed_official 585:a1ed5b41f74f 20 #include <math.h>
mbed_official 585:a1ed5b41f74f 21
mbed_official 585:a1ed5b41f74f 22 #include <string.h>
mbed_official 585:a1ed5b41f74f 23
mbed_official 585:a1ed5b41f74f 24 #include "cmsis.h"
mbed_official 585:a1ed5b41f74f 25 #include "pinmap.h"
mbed_official 585:a1ed5b41f74f 26 #include "clk_freqs.h"
mbed_official 585:a1ed5b41f74f 27 #include "PeripheralPins.h"
mbed_official 585:a1ed5b41f74f 28
mbed_official 585:a1ed5b41f74f 29 //Devices either user UART0 or UARTLP
mbed_official 585:a1ed5b41f74f 30 #ifndef UARTLP_BASES
mbed_official 585:a1ed5b41f74f 31 #define UARTLP_C2_RE_MASK UART0_C2_RE_MASK
mbed_official 585:a1ed5b41f74f 32 #define UARTLP_C2_TE_MASK UART0_C2_TE_MASK
mbed_official 585:a1ed5b41f74f 33 #define UARTLP_BDH_SBNS_MASK UART0_BDH_SBNS_MASK
mbed_official 585:a1ed5b41f74f 34 #define UARTLP_BDH_SBNS_SHIFT UART0_BDH_SBNS_SHIFT
mbed_official 585:a1ed5b41f74f 35 #define UARTLP_S1_TDRE_MASK UART0_S1_TDRE_MASK
mbed_official 585:a1ed5b41f74f 36 #define UARTLP_S1_TC_MASK UART0_S1_TC_MASK
mbed_official 585:a1ed5b41f74f 37 #define UARTLP_S1_OR_MASK UART0_S1_OR_MASK
mbed_official 585:a1ed5b41f74f 38 #define UARTLP_C2_RIE_MASK UART0_C2_RIE_MASK
mbed_official 585:a1ed5b41f74f 39 #define UARTLP_C2_TIE_MASK UART0_C2_TIE_MASK
mbed_official 585:a1ed5b41f74f 40 #define UARTLP_C2_SBK_MASK UART0_C2_SBK_MASK
mbed_official 585:a1ed5b41f74f 41 #define UARTLP_S1_RDRF_MASK UART0_S1_RDRF_MASK
mbed_official 585:a1ed5b41f74f 42 #endif
mbed_official 585:a1ed5b41f74f 43
mbed_official 585:a1ed5b41f74f 44 #ifdef UART2
mbed_official 585:a1ed5b41f74f 45 #define UART_NUM 3
mbed_official 585:a1ed5b41f74f 46 #else
mbed_official 585:a1ed5b41f74f 47 #define UART_NUM 1
mbed_official 585:a1ed5b41f74f 48 #endif
mbed_official 585:a1ed5b41f74f 49
mbed_official 585:a1ed5b41f74f 50 /******************************************************************************
mbed_official 585:a1ed5b41f74f 51 * INITIALIZATION
mbed_official 585:a1ed5b41f74f 52 ******************************************************************************/
mbed_official 585:a1ed5b41f74f 53
mbed_official 585:a1ed5b41f74f 54 static uint32_t serial_irq_ids[UART_NUM] = {0};
mbed_official 585:a1ed5b41f74f 55 static uart_irq_handler irq_handler;
mbed_official 585:a1ed5b41f74f 56
mbed_official 585:a1ed5b41f74f 57 int stdio_uart_inited = 0;
mbed_official 585:a1ed5b41f74f 58 serial_t stdio_uart;
mbed_official 585:a1ed5b41f74f 59
mbed_official 585:a1ed5b41f74f 60 void serial_init(serial_t *obj, PinName tx, PinName rx) {
mbed_official 585:a1ed5b41f74f 61 // determine the UART to use
mbed_official 585:a1ed5b41f74f 62 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
mbed_official 585:a1ed5b41f74f 63 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
mbed_official 585:a1ed5b41f74f 64 UARTName uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
mbed_official 585:a1ed5b41f74f 65 MBED_ASSERT((int)uart != NC);
mbed_official 585:a1ed5b41f74f 66
mbed_official 585:a1ed5b41f74f 67 obj->uart = (UARTLP_Type *)uart;
mbed_official 585:a1ed5b41f74f 68 // enable clk
mbed_official 585:a1ed5b41f74f 69 switch (uart) {
mbed_official 585:a1ed5b41f74f 70 case UART_0: if (mcgpllfll_frequency() != 0) //PLL/FLL is selected
mbed_official 585:a1ed5b41f74f 71 SIM->SOPT2 |= (1<<SIM_SOPT2_UART0SRC_SHIFT);
mbed_official 585:a1ed5b41f74f 72 else
mbed_official 585:a1ed5b41f74f 73 SIM->SOPT2 |= (2<<SIM_SOPT2_UART0SRC_SHIFT);
mbed_official 585:a1ed5b41f74f 74 SIM->SCGC4 |= SIM_SCGC4_UART0_MASK; break;
mbed_official 585:a1ed5b41f74f 75 #if UART_NUM > 1
mbed_official 585:a1ed5b41f74f 76 case UART_1: SIM->SCGC4 |= SIM_SCGC4_UART1_MASK; break;
mbed_official 585:a1ed5b41f74f 77 case UART_2: SIM->SCGC4 |= SIM_SCGC4_UART2_MASK; break;
mbed_official 585:a1ed5b41f74f 78 #endif
mbed_official 585:a1ed5b41f74f 79 }
mbed_official 585:a1ed5b41f74f 80 // Disable UART before changing registers
mbed_official 585:a1ed5b41f74f 81 obj->uart->C2 &= ~(UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK);
mbed_official 585:a1ed5b41f74f 82
mbed_official 585:a1ed5b41f74f 83 // Enable UART transmitter to ensure TX activity is finished
mbed_official 585:a1ed5b41f74f 84 obj->uart->C2 |= UARTLP_C2_TE_MASK;
mbed_official 585:a1ed5b41f74f 85
mbed_official 585:a1ed5b41f74f 86 // Wait for TX activity to finish
mbed_official 585:a1ed5b41f74f 87 while(!(obj->uart->S1 & UARTLP_S1_TC_MASK));
mbed_official 585:a1ed5b41f74f 88
mbed_official 585:a1ed5b41f74f 89 // Disbale UARTs again
mbed_official 585:a1ed5b41f74f 90 obj->uart->C2 &= ~(UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK);
mbed_official 585:a1ed5b41f74f 91
mbed_official 585:a1ed5b41f74f 92
mbed_official 585:a1ed5b41f74f 93 switch (uart) {
mbed_official 585:a1ed5b41f74f 94 case UART_0: obj->index = 0; break;
mbed_official 585:a1ed5b41f74f 95 #if UART_NUM > 1
mbed_official 585:a1ed5b41f74f 96 case UART_1: obj->index = 1; break;
mbed_official 585:a1ed5b41f74f 97 case UART_2: obj->index = 2; break;
mbed_official 585:a1ed5b41f74f 98 #endif
mbed_official 585:a1ed5b41f74f 99 }
mbed_official 585:a1ed5b41f74f 100
mbed_official 585:a1ed5b41f74f 101 // set default baud rate and format
mbed_official 585:a1ed5b41f74f 102 serial_baud (obj, 9600);
mbed_official 585:a1ed5b41f74f 103 serial_format(obj, 8, ParityNone, 1);
mbed_official 585:a1ed5b41f74f 104
mbed_official 585:a1ed5b41f74f 105 // pinout the chosen uart
mbed_official 585:a1ed5b41f74f 106 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 585:a1ed5b41f74f 107 pinmap_pinout(rx, PinMap_UART_RX);
mbed_official 585:a1ed5b41f74f 108
mbed_official 585:a1ed5b41f74f 109 // set rx/tx pins in PullUp mode and enable TX/RX
mbed_official 585:a1ed5b41f74f 110 if (tx != NC) {
mbed_official 585:a1ed5b41f74f 111 obj->uart->C2 |= UARTLP_C2_TE_MASK;
mbed_official 585:a1ed5b41f74f 112 pin_mode(tx, PullUp);
mbed_official 585:a1ed5b41f74f 113 }
mbed_official 585:a1ed5b41f74f 114 if (rx != NC) {
mbed_official 585:a1ed5b41f74f 115 obj->uart->C2 |= UARTLP_C2_RE_MASK;
mbed_official 585:a1ed5b41f74f 116 pin_mode(rx, PullUp);
mbed_official 585:a1ed5b41f74f 117 }
mbed_official 585:a1ed5b41f74f 118
mbed_official 585:a1ed5b41f74f 119 if (uart == STDIO_UART) {
mbed_official 585:a1ed5b41f74f 120 stdio_uart_inited = 1;
mbed_official 585:a1ed5b41f74f 121 memcpy(&stdio_uart, obj, sizeof(serial_t));
mbed_official 585:a1ed5b41f74f 122 }
mbed_official 585:a1ed5b41f74f 123 }
mbed_official 585:a1ed5b41f74f 124
mbed_official 585:a1ed5b41f74f 125 void serial_free(serial_t *obj) {
mbed_official 585:a1ed5b41f74f 126 serial_irq_ids[obj->index] = 0;
mbed_official 585:a1ed5b41f74f 127 }
mbed_official 585:a1ed5b41f74f 128
mbed_official 585:a1ed5b41f74f 129 // serial_baud
mbed_official 585:a1ed5b41f74f 130 //
mbed_official 585:a1ed5b41f74f 131 // set the baud rate, taking in to account the current SystemFrequency
mbed_official 585:a1ed5b41f74f 132 void serial_baud(serial_t *obj, int baudrate) {
mbed_official 585:a1ed5b41f74f 133
mbed_official 585:a1ed5b41f74f 134 // save C2 state
mbed_official 585:a1ed5b41f74f 135 uint8_t c2_state = (obj->uart->C2 & (UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK));
mbed_official 585:a1ed5b41f74f 136
mbed_official 585:a1ed5b41f74f 137 // Disable UART before changing registers
mbed_official 585:a1ed5b41f74f 138 obj->uart->C2 &= ~(UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK);
mbed_official 585:a1ed5b41f74f 139
mbed_official 585:a1ed5b41f74f 140 uint32_t PCLK;
mbed_official 585:a1ed5b41f74f 141 if (obj->uart == UART0) {
mbed_official 585:a1ed5b41f74f 142 if (mcgpllfll_frequency() != 0)
mbed_official 585:a1ed5b41f74f 143 PCLK = mcgpllfll_frequency();
mbed_official 585:a1ed5b41f74f 144 else
mbed_official 585:a1ed5b41f74f 145 PCLK = extosc_frequency();
mbed_official 585:a1ed5b41f74f 146 } else
mbed_official 585:a1ed5b41f74f 147 PCLK = bus_frequency();
mbed_official 585:a1ed5b41f74f 148
mbed_official 585:a1ed5b41f74f 149 // First we check to see if the basic divide with no DivAddVal/MulVal
mbed_official 585:a1ed5b41f74f 150 // ratio gives us an integer result. If it does, we set DivAddVal = 0,
mbed_official 585:a1ed5b41f74f 151 // MulVal = 1. Otherwise, we search the valid ratio value range to find
mbed_official 585:a1ed5b41f74f 152 // the closest match. This could be more elegant, using search methods
mbed_official 585:a1ed5b41f74f 153 // and/or lookup tables, but the brute force method is not that much
mbed_official 585:a1ed5b41f74f 154 // slower, and is more maintainable.
mbed_official 585:a1ed5b41f74f 155 uint16_t DL = PCLK / (16 * baudrate);
mbed_official 585:a1ed5b41f74f 156
mbed_official 585:a1ed5b41f74f 157 // set BDH and BDL
mbed_official 585:a1ed5b41f74f 158 obj->uart->BDH = (obj->uart->BDH & ~(0x1f)) | ((DL >> 8) & 0x1f);
mbed_official 585:a1ed5b41f74f 159 obj->uart->BDL = (obj->uart->BDL & ~(0xff)) | ((DL >> 0) & 0xff);
mbed_official 585:a1ed5b41f74f 160
mbed_official 585:a1ed5b41f74f 161 // restore C2 state
mbed_official 585:a1ed5b41f74f 162 obj->uart->C2 |= c2_state;
mbed_official 585:a1ed5b41f74f 163 }
mbed_official 585:a1ed5b41f74f 164
mbed_official 585:a1ed5b41f74f 165 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
mbed_official 585:a1ed5b41f74f 166 MBED_ASSERT((stop_bits == 1) || (stop_bits == 2));
mbed_official 585:a1ed5b41f74f 167 MBED_ASSERT((parity == ParityNone) || (parity == ParityOdd) || (parity == ParityEven));
mbed_official 585:a1ed5b41f74f 168 MBED_ASSERT(data_bits == 8); // TODO: Support other number of data bits (also in the write method!)
mbed_official 585:a1ed5b41f74f 169
mbed_official 585:a1ed5b41f74f 170 // save C2 state
mbed_official 585:a1ed5b41f74f 171 uint8_t c2_state = (obj->uart->C2 & (UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK));
mbed_official 585:a1ed5b41f74f 172
mbed_official 585:a1ed5b41f74f 173 // Disable UART before changing registers
mbed_official 585:a1ed5b41f74f 174 obj->uart->C2 &= ~(UARTLP_C2_RE_MASK | UARTLP_C2_TE_MASK);
mbed_official 585:a1ed5b41f74f 175
mbed_official 585:a1ed5b41f74f 176
mbed_official 585:a1ed5b41f74f 177 uint8_t parity_enable, parity_select;
mbed_official 585:a1ed5b41f74f 178 switch (parity) {
mbed_official 585:a1ed5b41f74f 179 case ParityNone: parity_enable = 0; parity_select = 0; break;
mbed_official 585:a1ed5b41f74f 180 case ParityOdd : parity_enable = 1; parity_select = 1; data_bits++; break;
mbed_official 585:a1ed5b41f74f 181 case ParityEven: parity_enable = 1; parity_select = 0; data_bits++; break;
mbed_official 585:a1ed5b41f74f 182 default:
mbed_official 585:a1ed5b41f74f 183 break;
mbed_official 585:a1ed5b41f74f 184 }
mbed_official 585:a1ed5b41f74f 185
mbed_official 585:a1ed5b41f74f 186 stop_bits -= 1;
mbed_official 585:a1ed5b41f74f 187
mbed_official 585:a1ed5b41f74f 188 // data bits, parity and parity mode
mbed_official 585:a1ed5b41f74f 189 obj->uart->C1 = ((parity_enable << 1)
mbed_official 585:a1ed5b41f74f 190 | (parity_select << 0));
mbed_official 585:a1ed5b41f74f 191
mbed_official 585:a1ed5b41f74f 192 // stop bits
mbed_official 585:a1ed5b41f74f 193 obj->uart->BDH &= ~UARTLP_BDH_SBNS_MASK;
mbed_official 585:a1ed5b41f74f 194 obj->uart->BDH |= (stop_bits << UARTLP_BDH_SBNS_SHIFT);
mbed_official 585:a1ed5b41f74f 195
mbed_official 585:a1ed5b41f74f 196 // restore C2 state
mbed_official 585:a1ed5b41f74f 197 obj->uart->C2 |= c2_state;
mbed_official 585:a1ed5b41f74f 198 }
mbed_official 585:a1ed5b41f74f 199
mbed_official 585:a1ed5b41f74f 200 /******************************************************************************
mbed_official 585:a1ed5b41f74f 201 * INTERRUPTS HANDLING
mbed_official 585:a1ed5b41f74f 202 ******************************************************************************/
mbed_official 585:a1ed5b41f74f 203 static inline void uart_irq(uint8_t status, uint32_t index) {
mbed_official 585:a1ed5b41f74f 204 if (serial_irq_ids[index] != 0) {
mbed_official 585:a1ed5b41f74f 205 if (status & UARTLP_S1_TDRE_MASK)
mbed_official 585:a1ed5b41f74f 206 irq_handler(serial_irq_ids[index], TxIrq);
mbed_official 585:a1ed5b41f74f 207
mbed_official 585:a1ed5b41f74f 208 if (status & UARTLP_S1_RDRF_MASK)
mbed_official 585:a1ed5b41f74f 209 irq_handler(serial_irq_ids[index], RxIrq);
mbed_official 585:a1ed5b41f74f 210 }
mbed_official 585:a1ed5b41f74f 211 }
mbed_official 585:a1ed5b41f74f 212
mbed_official 585:a1ed5b41f74f 213 void uart0_irq() {
mbed_official 585:a1ed5b41f74f 214 uart_irq(UART0->S1, 0);
mbed_official 585:a1ed5b41f74f 215 if (UART0->S1 & UARTLP_S1_OR_MASK)
mbed_official 585:a1ed5b41f74f 216 UART0->S1 |= UARTLP_S1_OR_MASK;
mbed_official 585:a1ed5b41f74f 217 }
mbed_official 585:a1ed5b41f74f 218 #if UART_NUM > 1
mbed_official 585:a1ed5b41f74f 219 void uart1_irq() {uart_irq(UART1->S1, 1);}
mbed_official 585:a1ed5b41f74f 220 void uart2_irq() {uart_irq(UART2->S1, 2);}
mbed_official 585:a1ed5b41f74f 221 #endif
mbed_official 585:a1ed5b41f74f 222
mbed_official 585:a1ed5b41f74f 223 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
mbed_official 585:a1ed5b41f74f 224 irq_handler = handler;
mbed_official 585:a1ed5b41f74f 225 serial_irq_ids[obj->index] = id;
mbed_official 585:a1ed5b41f74f 226 }
mbed_official 585:a1ed5b41f74f 227
mbed_official 585:a1ed5b41f74f 228 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
mbed_official 585:a1ed5b41f74f 229 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 585:a1ed5b41f74f 230 uint32_t vector = 0;
mbed_official 585:a1ed5b41f74f 231 switch ((int)obj->uart) {
mbed_official 585:a1ed5b41f74f 232 case UART_0: irq_n=UART0_IRQn; vector = (uint32_t)&uart0_irq; break;
mbed_official 585:a1ed5b41f74f 233 #if UART_NUM > 1
mbed_official 585:a1ed5b41f74f 234 case UART_1: irq_n=UART1_IRQn; vector = (uint32_t)&uart1_irq; break;
mbed_official 585:a1ed5b41f74f 235 case UART_2: irq_n=UART2_IRQn; vector = (uint32_t)&uart2_irq; break;
mbed_official 585:a1ed5b41f74f 236 #endif
mbed_official 585:a1ed5b41f74f 237 }
mbed_official 585:a1ed5b41f74f 238
mbed_official 585:a1ed5b41f74f 239 if (enable) {
mbed_official 585:a1ed5b41f74f 240 switch (irq) {
mbed_official 585:a1ed5b41f74f 241 case RxIrq: obj->uart->C2 |= (UARTLP_C2_RIE_MASK); break;
mbed_official 585:a1ed5b41f74f 242 case TxIrq: obj->uart->C2 |= (UARTLP_C2_TIE_MASK); break;
mbed_official 585:a1ed5b41f74f 243 }
mbed_official 585:a1ed5b41f74f 244 NVIC_SetVector(irq_n, vector);
mbed_official 585:a1ed5b41f74f 245 NVIC_EnableIRQ(irq_n);
mbed_official 585:a1ed5b41f74f 246
mbed_official 585:a1ed5b41f74f 247 } else { // disable
mbed_official 585:a1ed5b41f74f 248 int all_disabled = 0;
mbed_official 585:a1ed5b41f74f 249 SerialIrq other_irq = (irq == RxIrq) ? (TxIrq) : (RxIrq);
mbed_official 585:a1ed5b41f74f 250 switch (irq) {
mbed_official 585:a1ed5b41f74f 251 case RxIrq: obj->uart->C2 &= ~(UARTLP_C2_RIE_MASK); break;
mbed_official 585:a1ed5b41f74f 252 case TxIrq: obj->uart->C2 &= ~(UARTLP_C2_TIE_MASK); break;
mbed_official 585:a1ed5b41f74f 253 }
mbed_official 585:a1ed5b41f74f 254 switch (other_irq) {
mbed_official 585:a1ed5b41f74f 255 case RxIrq: all_disabled = (obj->uart->C2 & (UARTLP_C2_RIE_MASK)) == 0; break;
mbed_official 585:a1ed5b41f74f 256 case TxIrq: all_disabled = (obj->uart->C2 & (UARTLP_C2_TIE_MASK)) == 0; break;
mbed_official 585:a1ed5b41f74f 257 }
mbed_official 585:a1ed5b41f74f 258 if (all_disabled)
mbed_official 585:a1ed5b41f74f 259 NVIC_DisableIRQ(irq_n);
mbed_official 585:a1ed5b41f74f 260 }
mbed_official 585:a1ed5b41f74f 261 }
mbed_official 585:a1ed5b41f74f 262
mbed_official 585:a1ed5b41f74f 263 /******************************************************************************
mbed_official 585:a1ed5b41f74f 264 * READ/WRITE
mbed_official 585:a1ed5b41f74f 265 ******************************************************************************/
mbed_official 585:a1ed5b41f74f 266 int serial_getc(serial_t *obj) {
mbed_official 585:a1ed5b41f74f 267 while (!serial_readable(obj));
mbed_official 585:a1ed5b41f74f 268 return obj->uart->D;
mbed_official 585:a1ed5b41f74f 269 }
mbed_official 585:a1ed5b41f74f 270
mbed_official 585:a1ed5b41f74f 271 void serial_putc(serial_t *obj, int c) {
mbed_official 585:a1ed5b41f74f 272 while (!serial_writable(obj));
mbed_official 585:a1ed5b41f74f 273 obj->uart->D = c;
mbed_official 585:a1ed5b41f74f 274 }
mbed_official 585:a1ed5b41f74f 275
mbed_official 585:a1ed5b41f74f 276 int serial_readable(serial_t *obj) {
mbed_official 585:a1ed5b41f74f 277 // check overrun
mbed_official 585:a1ed5b41f74f 278 if (obj->uart->S1 & UARTLP_S1_OR_MASK) {
mbed_official 585:a1ed5b41f74f 279 obj->uart->S1 |= UARTLP_S1_OR_MASK;
mbed_official 585:a1ed5b41f74f 280 }
mbed_official 585:a1ed5b41f74f 281 return (obj->uart->S1 & UARTLP_S1_RDRF_MASK);
mbed_official 585:a1ed5b41f74f 282 }
mbed_official 585:a1ed5b41f74f 283
mbed_official 585:a1ed5b41f74f 284 int serial_writable(serial_t *obj) {
mbed_official 585:a1ed5b41f74f 285 // check overrun
mbed_official 585:a1ed5b41f74f 286 if (obj->uart->S1 & UARTLP_S1_OR_MASK) {
mbed_official 585:a1ed5b41f74f 287 obj->uart->S1 |= UARTLP_S1_OR_MASK;
mbed_official 585:a1ed5b41f74f 288 }
mbed_official 585:a1ed5b41f74f 289 return (obj->uart->S1 & UARTLP_S1_TDRE_MASK);
mbed_official 585:a1ed5b41f74f 290 }
mbed_official 585:a1ed5b41f74f 291
mbed_official 585:a1ed5b41f74f 292 void serial_clear(serial_t *obj) {
mbed_official 585:a1ed5b41f74f 293 }
mbed_official 585:a1ed5b41f74f 294
mbed_official 585:a1ed5b41f74f 295 void serial_pinout_tx(PinName tx) {
mbed_official 585:a1ed5b41f74f 296 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 585:a1ed5b41f74f 297 }
mbed_official 585:a1ed5b41f74f 298
mbed_official 585:a1ed5b41f74f 299 void serial_break_set(serial_t *obj) {
mbed_official 585:a1ed5b41f74f 300 obj->uart->C2 |= UARTLP_C2_SBK_MASK;
mbed_official 585:a1ed5b41f74f 301 }
mbed_official 585:a1ed5b41f74f 302
mbed_official 585:a1ed5b41f74f 303 void serial_break_clear(serial_t *obj) {
mbed_official 585:a1ed5b41f74f 304 obj->uart->C2 &= ~UARTLP_C2_SBK_MASK;
mbed_official 585:a1ed5b41f74f 305 }