Ben Katz / mbed-dev-f303

mbed library sources. Supersedes mbed-src.

Dependents:   Hobbyking_Cheetah_Compact Hobbyking_Cheetah_Compact_DRV8323_14bit Hobbyking_Cheetah_Compact_DRV8323_V51_201907 HKC_MiniCheetah ... more

Fork of mbed-dev by mbed official

targets/TARGET_Maxim/TARGET_MAX32610/serial_api.c@181:36facd806e4a, 2018-07-30 (annotated)

Committer:
benkatz
Date:
Mon Jul 30 20:31:44 2018 +0000
Revision:
181:36facd806e4a
Parent:
149:156823d33999 
going on the robot.  fixed a dumb bug in float_to_uint

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /*******************************************************************************
<> 144:ef7eb2e8f9f7 2 * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved.
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Permission is hereby granted, free of charge, to any person obtaining a
<> 144:ef7eb2e8f9f7 5 * copy of this software and associated documentation files (the "Software"),
<> 144:ef7eb2e8f9f7 6 * to deal in the Software without restriction, including without limitation
<> 144:ef7eb2e8f9f7 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
<> 144:ef7eb2e8f9f7 8 * and/or sell copies of the Software, and to permit persons to whom the
<> 144:ef7eb2e8f9f7 9 * Software is furnished to do so, subject to the following conditions:
<> 144:ef7eb2e8f9f7 10 *
<> 144:ef7eb2e8f9f7 11 * The above copyright notice and this permission notice shall be included
<> 144:ef7eb2e8f9f7 12 * in all copies or substantial portions of the Software.
<> 144:ef7eb2e8f9f7 13 *
<> 144:ef7eb2e8f9f7 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
<> 144:ef7eb2e8f9f7 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
<> 144:ef7eb2e8f9f7 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
<> 144:ef7eb2e8f9f7 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
<> 144:ef7eb2e8f9f7 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
<> 144:ef7eb2e8f9f7 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
<> 144:ef7eb2e8f9f7 20 * OTHER DEALINGS IN THE SOFTWARE.
<> 144:ef7eb2e8f9f7 21 *
<> 144:ef7eb2e8f9f7 22 * Except as contained in this notice, the name of Maxim Integrated
<> 144:ef7eb2e8f9f7 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
<> 144:ef7eb2e8f9f7 24 * Products, Inc. Branding Policy.
<> 144:ef7eb2e8f9f7 25 *
<> 144:ef7eb2e8f9f7 26 * The mere transfer of this software does not imply any licenses
<> 144:ef7eb2e8f9f7 27 * of trade secrets, proprietary technology, copyrights, patents,
<> 144:ef7eb2e8f9f7 28 * trademarks, maskwork rights, or any other form of intellectual
<> 144:ef7eb2e8f9f7 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
<> 144:ef7eb2e8f9f7 30 * ownership rights.
<> 144:ef7eb2e8f9f7 31 *******************************************************************************
<> 144:ef7eb2e8f9f7 32 */
<> 144:ef7eb2e8f9f7 33
<> 144:ef7eb2e8f9f7 34 #include <string.h>
<> 144:ef7eb2e8f9f7 35 #include "mbed_assert.h"
<> 144:ef7eb2e8f9f7 36 #include "cmsis.h"
<> 144:ef7eb2e8f9f7 37 #include "serial_api.h"
<> 144:ef7eb2e8f9f7 38 #include "gpio_api.h"
<> 144:ef7eb2e8f9f7 39 #include "uart_regs.h"
<> 144:ef7eb2e8f9f7 40 #include "ioman_regs.h"
<> 144:ef7eb2e8f9f7 41 #include "PeripheralPins.h"
<> 144:ef7eb2e8f9f7 42
<> 144:ef7eb2e8f9f7 43 #define UART_NUM 2
<> 144:ef7eb2e8f9f7 44 #define DEFAULT_BAUD 9600
<> 144:ef7eb2e8f9f7 45 #define DEFAULT_STOP 1
<> 144:ef7eb2e8f9f7 46 #define DEFAULT_PARITY ParityNone
<> 144:ef7eb2e8f9f7 47
<> 144:ef7eb2e8f9f7 48 #define UART_ERRORS (MXC_F_UART_INTFL_RX_FRAME_ERROR | \
<> 144:ef7eb2e8f9f7 49 MXC_F_UART_INTFL_RX_PARITY_ERROR | \
<> 144:ef7eb2e8f9f7 50 MXC_F_UART_INTFL_RX_OVERRUN)
<> 144:ef7eb2e8f9f7 51
<> 144:ef7eb2e8f9f7 52 // Variables for managing the stdio UART
<> 144:ef7eb2e8f9f7 53 int stdio_uart_inited;
<> 144:ef7eb2e8f9f7 54 serial_t stdio_uart;
<> 144:ef7eb2e8f9f7 55
<> 144:ef7eb2e8f9f7 56 // Variables for interrupt driven
<> 144:ef7eb2e8f9f7 57 static uart_irq_handler irq_handler;
<> 144:ef7eb2e8f9f7 58 static uint32_t serial_irq_ids[UART_NUM];
<> 144:ef7eb2e8f9f7 59
<> 144:ef7eb2e8f9f7 60 //******************************************************************************
<> 144:ef7eb2e8f9f7 61 void serial_init(serial_t *obj, PinName tx, PinName rx)
<> 144:ef7eb2e8f9f7 62 {
<> 144:ef7eb2e8f9f7 63 // Determine which uart is associated with each pin
<> 144:ef7eb2e8f9f7 64 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
<> 144:ef7eb2e8f9f7 65 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
<> 144:ef7eb2e8f9f7 66 UARTName uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
<> 144:ef7eb2e8f9f7 67
<> 144:ef7eb2e8f9f7 68 // Make sure that both pins are pointing to the same uart
<> 144:ef7eb2e8f9f7 69 MBED_ASSERT(uart != (UARTName)NC);
<> 144:ef7eb2e8f9f7 70
<> 144:ef7eb2e8f9f7 71 // Set the obj pointer to the proper uart
<> 144:ef7eb2e8f9f7 72 obj->uart = (mxc_uart_regs_t*)uart;
<> 144:ef7eb2e8f9f7 73
<> 144:ef7eb2e8f9f7 74 // Set the uart index
<> 144:ef7eb2e8f9f7 75 obj->index = MXC_UART_BASE_TO_INSTANCE(obj->uart);
<> 144:ef7eb2e8f9f7 76
<> 144:ef7eb2e8f9f7 77 // Configure the pins
<> 144:ef7eb2e8f9f7 78 pinmap_pinout(tx, PinMap_UART_TX);
<> 144:ef7eb2e8f9f7 79 pinmap_pinout(rx, PinMap_UART_RX);
<> 144:ef7eb2e8f9f7 80
<> 144:ef7eb2e8f9f7 81 // Flush the RX and TX FIFOs, clear the settings
<> 144:ef7eb2e8f9f7 82 obj->uart->ctrl = ( MXC_F_UART_CTRL_TX_FIFO_FLUSH | MXC_F_UART_CTRL_RX_FIFO_FLUSH);
<> 144:ef7eb2e8f9f7 83
<> 144:ef7eb2e8f9f7 84 // Disable interrupts
<> 144:ef7eb2e8f9f7 85 obj->uart->inten = 0;
<> 144:ef7eb2e8f9f7 86 obj->uart->intfl = 0;
<> 144:ef7eb2e8f9f7 87
<> 144:ef7eb2e8f9f7 88 // Configure to default settings
<> 144:ef7eb2e8f9f7 89 serial_baud(obj, DEFAULT_BAUD);
<> 144:ef7eb2e8f9f7 90 serial_format(obj, 8, ParityNone, 1);
<> 144:ef7eb2e8f9f7 91
<> 144:ef7eb2e8f9f7 92 // Manage stdio UART
<> 144:ef7eb2e8f9f7 93 if(uart == STDIO_UART) {
<> 144:ef7eb2e8f9f7 94 stdio_uart_inited = 1;
<> 144:ef7eb2e8f9f7 95 memcpy(&stdio_uart, obj, sizeof(serial_t));
<> 144:ef7eb2e8f9f7 96 }
<> 144:ef7eb2e8f9f7 97 }
<> 144:ef7eb2e8f9f7 98
<> 144:ef7eb2e8f9f7 99 //******************************************************************************
<> 144:ef7eb2e8f9f7 100 void serial_baud(serial_t *obj, int baudrate)
<> 144:ef7eb2e8f9f7 101 {
<> 144:ef7eb2e8f9f7 102 uint32_t idiv = 0, ddiv = 0, div = 0;
<> 144:ef7eb2e8f9f7 103
<> 144:ef7eb2e8f9f7 104 // Calculate the integer and decimal portions
<> 144:ef7eb2e8f9f7 105 div = SystemCoreClock / ((baudrate / 100) * 128);
<> 144:ef7eb2e8f9f7 106 idiv = (div / 100);
<> 144:ef7eb2e8f9f7 107 ddiv = (div - idiv * 100) * 128 / 100;
<> 144:ef7eb2e8f9f7 108
<> 144:ef7eb2e8f9f7 109 obj->uart->baud_int = idiv;
<> 144:ef7eb2e8f9f7 110 obj->uart->baud_div_128 = ddiv;
<> 144:ef7eb2e8f9f7 111
<> 144:ef7eb2e8f9f7 112 // Enable the baud clock
<> 144:ef7eb2e8f9f7 113 obj->uart->ctrl |= MXC_F_UART_CTRL_BAUD_CLK_EN;
<> 144:ef7eb2e8f9f7 114 }
<> 144:ef7eb2e8f9f7 115
<> 144:ef7eb2e8f9f7 116 //******************************************************************************
<> 144:ef7eb2e8f9f7 117 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits)
<> 144:ef7eb2e8f9f7 118 {
<> 144:ef7eb2e8f9f7 119
<> 144:ef7eb2e8f9f7 120 // Check the validity of the inputs
<> 144:ef7eb2e8f9f7 121 MBED_ASSERT((data_bits > 4) && (data_bits < 9));
<> 144:ef7eb2e8f9f7 122 MBED_ASSERT((parity == ParityNone) || (parity == ParityOdd) ||
<> 144:ef7eb2e8f9f7 123 (parity == ParityEven) || (parity == ParityForced1) ||
<> 144:ef7eb2e8f9f7 124 (parity == ParityForced0));
<> 144:ef7eb2e8f9f7 125 MBED_ASSERT((stop_bits == 1) || (stop_bits == 2));
<> 144:ef7eb2e8f9f7 126
<> 144:ef7eb2e8f9f7 127 // Adjust the stop and data bits
<> 144:ef7eb2e8f9f7 128 stop_bits -= 1;
<> 144:ef7eb2e8f9f7 129 data_bits -= 5;
<> 144:ef7eb2e8f9f7 130
<> 144:ef7eb2e8f9f7 131 // Adjust the parity setting
<> 144:ef7eb2e8f9f7 132 int paren = 0, mode = 0;
<> 144:ef7eb2e8f9f7 133 switch (parity) {
<> 144:ef7eb2e8f9f7 134 case ParityNone:
<> 144:ef7eb2e8f9f7 135 paren = 0;
<> 144:ef7eb2e8f9f7 136 mode = 0;
<> 144:ef7eb2e8f9f7 137 break;
<> 144:ef7eb2e8f9f7 138 case ParityOdd :
<> 144:ef7eb2e8f9f7 139 paren = 1;
<> 144:ef7eb2e8f9f7 140 mode = 0;
<> 144:ef7eb2e8f9f7 141 break;
<> 144:ef7eb2e8f9f7 142 case ParityEven:
<> 144:ef7eb2e8f9f7 143 paren = 1;
<> 144:ef7eb2e8f9f7 144 mode = 1;
<> 144:ef7eb2e8f9f7 145 break;
<> 144:ef7eb2e8f9f7 146 case ParityForced1:
<> 144:ef7eb2e8f9f7 147 // Hardware does not support forced parity
<> 144:ef7eb2e8f9f7 148 MBED_ASSERT(0);
<> 144:ef7eb2e8f9f7 149 break;
<> 144:ef7eb2e8f9f7 150 case ParityForced0:
<> 144:ef7eb2e8f9f7 151 // Hardware does not support forced parity
<> 144:ef7eb2e8f9f7 152 MBED_ASSERT(0);
<> 144:ef7eb2e8f9f7 153 break;
<> 144:ef7eb2e8f9f7 154 default:
<> 144:ef7eb2e8f9f7 155 paren = 1;
<> 144:ef7eb2e8f9f7 156 mode = 0;
<> 144:ef7eb2e8f9f7 157 break;
<> 144:ef7eb2e8f9f7 158 }
<> 144:ef7eb2e8f9f7 159
<> 144:ef7eb2e8f9f7 160 obj->uart->ctrl |= ((data_bits << MXC_F_UART_CTRL_CHAR_LENGTH_POS) |
<> 144:ef7eb2e8f9f7 161 (stop_bits << MXC_F_UART_CTRL_STOP_BIT_MODE_POS) |
<> 144:ef7eb2e8f9f7 162 (paren << MXC_F_UART_CTRL_PARITY_ENABLE_POS) |
<> 144:ef7eb2e8f9f7 163 (mode << MXC_F_UART_CTRL_PARITY_MODE_POS));
<> 144:ef7eb2e8f9f7 164 }
<> 144:ef7eb2e8f9f7 165
<> 144:ef7eb2e8f9f7 166 //******************************************************************************
<> 144:ef7eb2e8f9f7 167 void uart_handler(mxc_uart_regs_t* uart, int id)
<> 144:ef7eb2e8f9f7 168 {
<> 144:ef7eb2e8f9f7 169 // Check for errors or RX Threshold
<> 144:ef7eb2e8f9f7 170 if(uart->intfl & (MXC_F_UART_INTFL_RX_OVER_THRESHOLD | UART_ERRORS)) {
<> 144:ef7eb2e8f9f7 171 irq_handler(serial_irq_ids[id], RxIrq);
<> 144:ef7eb2e8f9f7 172 uart->intfl &= ~(MXC_F_UART_INTFL_RX_OVER_THRESHOLD | UART_ERRORS);
<> 144:ef7eb2e8f9f7 173 }
<> 144:ef7eb2e8f9f7 174
<> 144:ef7eb2e8f9f7 175 // Check for TX Threshold
<> 144:ef7eb2e8f9f7 176 if(uart->intfl & MXC_F_UART_INTFL_TX_ALMOST_EMPTY) {
<> 144:ef7eb2e8f9f7 177 irq_handler(serial_irq_ids[id], TxIrq);
<> 144:ef7eb2e8f9f7 178 uart->intfl &= ~(MXC_F_UART_INTFL_TX_ALMOST_EMPTY);
<> 144:ef7eb2e8f9f7 179 }
<> 144:ef7eb2e8f9f7 180 }
<> 144:ef7eb2e8f9f7 181
<> 144:ef7eb2e8f9f7 182 void uart0_handler(void)
<> 144:ef7eb2e8f9f7 183 {
<> 144:ef7eb2e8f9f7 184 uart_handler(MXC_UART0, 0);
<> 144:ef7eb2e8f9f7 185 }
<> 144:ef7eb2e8f9f7 186 void uart1_handler(void)
<> 144:ef7eb2e8f9f7 187 {
<> 144:ef7eb2e8f9f7 188 uart_handler(MXC_UART1, 1);
<> 144:ef7eb2e8f9f7 189 }
<> 144:ef7eb2e8f9f7 190
<> 144:ef7eb2e8f9f7 191 //******************************************************************************
<> 144:ef7eb2e8f9f7 192 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
<> 144:ef7eb2e8f9f7 193 {
<> 144:ef7eb2e8f9f7 194 irq_handler = handler;
<> 144:ef7eb2e8f9f7 195 serial_irq_ids[obj->index] = id;
<> 144:ef7eb2e8f9f7 196 }
<> 144:ef7eb2e8f9f7 197
<> 144:ef7eb2e8f9f7 198 //******************************************************************************
<> 144:ef7eb2e8f9f7 199 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
<> 144:ef7eb2e8f9f7 200 {
<> 144:ef7eb2e8f9f7 201 if(obj->index == 0) {
<> 144:ef7eb2e8f9f7 202 NVIC_SetVector(UART0_IRQn, (uint32_t)uart0_handler);
<> 144:ef7eb2e8f9f7 203 NVIC_EnableIRQ(UART0_IRQn);
<> 144:ef7eb2e8f9f7 204 } else {
<> 144:ef7eb2e8f9f7 205 NVIC_SetVector(UART1_IRQn, (uint32_t)uart1_handler);
<> 144:ef7eb2e8f9f7 206 NVIC_EnableIRQ(UART1_IRQn);
<> 144:ef7eb2e8f9f7 207 }
<> 144:ef7eb2e8f9f7 208
<> 144:ef7eb2e8f9f7 209 if(irq == RxIrq) {
<> 144:ef7eb2e8f9f7 210 // Set the RX FIFO Threshold to 1
<> 144:ef7eb2e8f9f7 211 obj->uart->ctrl &= ~MXC_F_UART_CTRL_RX_THRESHOLD;
<> 144:ef7eb2e8f9f7 212 obj->uart->ctrl |= 0x1;
<> 144:ef7eb2e8f9f7 213 // Enable RX FIFO Threshold Interrupt
<> 144:ef7eb2e8f9f7 214 if(enable) {
<> 144:ef7eb2e8f9f7 215 // Clear pending interrupts
<> 144:ef7eb2e8f9f7 216 obj->uart->intfl = 0;
<> 144:ef7eb2e8f9f7 217 obj->uart->inten |= (MXC_F_UART_INTFL_RX_OVER_THRESHOLD |
<> 144:ef7eb2e8f9f7 218 UART_ERRORS);
<> 144:ef7eb2e8f9f7 219 } else {
<> 144:ef7eb2e8f9f7 220 // Clear pending interrupts
<> 144:ef7eb2e8f9f7 221 obj->uart->intfl = 0;
<> 144:ef7eb2e8f9f7 222 obj->uart->inten &= ~(MXC_F_UART_INTFL_RX_OVER_THRESHOLD |
<> 144:ef7eb2e8f9f7 223 UART_ERRORS);
<> 144:ef7eb2e8f9f7 224 }
<> 144:ef7eb2e8f9f7 225
<> 144:ef7eb2e8f9f7 226 } else if (irq == TxIrq) {
<> 144:ef7eb2e8f9f7 227 // Enable TX Almost empty Interrupt
<> 144:ef7eb2e8f9f7 228 if(enable) {
<> 144:ef7eb2e8f9f7 229 // Clear pending interrupts
<> 144:ef7eb2e8f9f7 230 obj->uart->intfl = 0;
<> 144:ef7eb2e8f9f7 231 obj->uart->inten |= MXC_F_UART_INTFL_TX_ALMOST_EMPTY;
<> 144:ef7eb2e8f9f7 232 } else {
<> 144:ef7eb2e8f9f7 233 // Clear pending interrupts
<> 144:ef7eb2e8f9f7 234 obj->uart->intfl = 0;
<> 144:ef7eb2e8f9f7 235 obj->uart->inten &= ~MXC_F_UART_INTFL_TX_ALMOST_EMPTY;
<> 144:ef7eb2e8f9f7 236 }
<> 144:ef7eb2e8f9f7 237
<> 144:ef7eb2e8f9f7 238 } else {
<> 144:ef7eb2e8f9f7 239 MBED_ASSERT(0);
<> 144:ef7eb2e8f9f7 240 }
<> 144:ef7eb2e8f9f7 241 }
<> 144:ef7eb2e8f9f7 242
<> 144:ef7eb2e8f9f7 243
<> 144:ef7eb2e8f9f7 244 //******************************************************************************
<> 144:ef7eb2e8f9f7 245 int serial_getc(serial_t *obj)
<> 144:ef7eb2e8f9f7 246 {
<> 144:ef7eb2e8f9f7 247 int c;
<> 144:ef7eb2e8f9f7 248
<> 144:ef7eb2e8f9f7 249 // Wait for data to be available
<> 144:ef7eb2e8f9f7 250 while(obj->uart->status & MXC_F_UART_STATUS_RX_FIFO_EMPTY) {}
<> 144:ef7eb2e8f9f7 251 c = obj->uart->tx_rx_fifo & 0xFF;
<> 144:ef7eb2e8f9f7 252
<> 144:ef7eb2e8f9f7 253 return c;
<> 144:ef7eb2e8f9f7 254 }
<> 144:ef7eb2e8f9f7 255
<> 144:ef7eb2e8f9f7 256 //******************************************************************************
<> 144:ef7eb2e8f9f7 257 void serial_putc(serial_t *obj, int c)
<> 144:ef7eb2e8f9f7 258 {
<> 144:ef7eb2e8f9f7 259 // Wait for TXFIFO to not be full
<> 144:ef7eb2e8f9f7 260 while(obj->uart->status & MXC_F_UART_STATUS_TX_FIFO_FULL) {}
<> 144:ef7eb2e8f9f7 261 obj->uart->tx_rx_fifo = c;
<> 144:ef7eb2e8f9f7 262 }
<> 144:ef7eb2e8f9f7 263
<> 144:ef7eb2e8f9f7 264 //******************************************************************************
<> 144:ef7eb2e8f9f7 265 int serial_readable(serial_t *obj)
<> 144:ef7eb2e8f9f7 266 {
<> 144:ef7eb2e8f9f7 267 return (!(obj->uart->status & MXC_F_UART_STATUS_RX_FIFO_EMPTY));
<> 144:ef7eb2e8f9f7 268 }
<> 144:ef7eb2e8f9f7 269
<> 144:ef7eb2e8f9f7 270 //******************************************************************************
<> 144:ef7eb2e8f9f7 271 int serial_writable(serial_t *obj)
<> 144:ef7eb2e8f9f7 272 {
<> 144:ef7eb2e8f9f7 273 return (!(obj->uart->status & MXC_F_UART_STATUS_TX_FIFO_FULL));
<> 144:ef7eb2e8f9f7 274 }
<> 144:ef7eb2e8f9f7 275
<> 144:ef7eb2e8f9f7 276 //******************************************************************************
<> 144:ef7eb2e8f9f7 277 void serial_clear(serial_t *obj)
<> 144:ef7eb2e8f9f7 278 {
<> 144:ef7eb2e8f9f7 279 // Clear the rx and tx fifos
<> 144:ef7eb2e8f9f7 280 obj->uart->ctrl |= (MXC_F_UART_CTRL_TX_FIFO_FLUSH | MXC_F_UART_CTRL_RX_FIFO_FLUSH );
<> 144:ef7eb2e8f9f7 281 }
<> 144:ef7eb2e8f9f7 282
<> 144:ef7eb2e8f9f7 283 //******************************************************************************
<> 144:ef7eb2e8f9f7 284 void serial_break_set(serial_t *obj)
<> 144:ef7eb2e8f9f7 285 {
<> 144:ef7eb2e8f9f7 286 // Make sure that nothing is being sent
<> 144:ef7eb2e8f9f7 287 while (!(obj->uart->status & MXC_F_UART_STATUS_TX_FIFO_EMPTY));
<> 144:ef7eb2e8f9f7 288 while (obj->uart->status & MXC_F_UART_STATUS_TX_BUSY);
<> 144:ef7eb2e8f9f7 289
<> 144:ef7eb2e8f9f7 290 // Configure the GPIO to outpu 0
<> 144:ef7eb2e8f9f7 291 gpio_t tx_gpio;
<> 144:ef7eb2e8f9f7 292 switch (((UARTName)(obj->uart))) {
<> 144:ef7eb2e8f9f7 293 case UART_0:
<> 144:ef7eb2e8f9f7 294 gpio_init_out(&tx_gpio, UART0_TX);
<> 144:ef7eb2e8f9f7 295 break;
<> 144:ef7eb2e8f9f7 296 case UART_1:
<> 144:ef7eb2e8f9f7 297 gpio_init_out(&tx_gpio, UART1_TX);
<> 144:ef7eb2e8f9f7 298 break;
<> 144:ef7eb2e8f9f7 299 default:
<> 144:ef7eb2e8f9f7 300 gpio_init_out(&tx_gpio, (PinName)NC);
<> 144:ef7eb2e8f9f7 301 break;
<> 144:ef7eb2e8f9f7 302 }
<> 144:ef7eb2e8f9f7 303
<> 144:ef7eb2e8f9f7 304 gpio_write(&tx_gpio, 0);
<> 144:ef7eb2e8f9f7 305
<> 144:ef7eb2e8f9f7 306 // GPIO is setup now, but we need to maps gpio to the pin
<> 144:ef7eb2e8f9f7 307 switch (((UARTName)(obj->uart))) {
<> 144:ef7eb2e8f9f7 308 case UART_0:
<> 144:ef7eb2e8f9f7 309 MXC_IOMAN->uart0_req &= ~MXC_F_IOMAN_UART_CORE_IO;
<> 144:ef7eb2e8f9f7 310 MBED_ASSERT((MXC_IOMAN->uart0_ack & (MXC_F_IOMAN_UART_CORE_IO | MXC_F_IOMAN_UART_CORE_IO)) == 0);
<> 144:ef7eb2e8f9f7 311 break;
<> 144:ef7eb2e8f9f7 312 case UART_1:
<> 144:ef7eb2e8f9f7 313 MXC_IOMAN->uart1_req &= ~MXC_F_IOMAN_UART_CORE_IO;
<> 144:ef7eb2e8f9f7 314 MBED_ASSERT((MXC_IOMAN->uart1_ack & (MXC_F_IOMAN_UART_CORE_IO | MXC_F_IOMAN_UART_CORE_IO)) == 0);
<> 144:ef7eb2e8f9f7 315 break;
<> 144:ef7eb2e8f9f7 316 default:
<> 144:ef7eb2e8f9f7 317 break;
<> 144:ef7eb2e8f9f7 318 }
<> 144:ef7eb2e8f9f7 319 }
<> 144:ef7eb2e8f9f7 320
<> 144:ef7eb2e8f9f7 321 //******************************************************************************
<> 144:ef7eb2e8f9f7 322 void serial_break_clear(serial_t *obj)
<> 144:ef7eb2e8f9f7 323 {
<> 144:ef7eb2e8f9f7 324 // Configure the GPIO to output 1
<> 144:ef7eb2e8f9f7 325 gpio_t tx_gpio;
<> 144:ef7eb2e8f9f7 326 switch (((UARTName)(obj->uart))) {
<> 144:ef7eb2e8f9f7 327 case UART_0:
<> 144:ef7eb2e8f9f7 328 gpio_init_out(&tx_gpio, UART0_TX);
<> 144:ef7eb2e8f9f7 329 break;
<> 144:ef7eb2e8f9f7 330 case UART_1:
<> 144:ef7eb2e8f9f7 331 gpio_init_out(&tx_gpio, UART1_TX);
<> 144:ef7eb2e8f9f7 332 break;
<> 144:ef7eb2e8f9f7 333 default:
<> 144:ef7eb2e8f9f7 334 gpio_init_out(&tx_gpio, (PinName)NC);
<> 144:ef7eb2e8f9f7 335 break;
<> 144:ef7eb2e8f9f7 336 }
<> 144:ef7eb2e8f9f7 337
<> 144:ef7eb2e8f9f7 338 gpio_write(&tx_gpio, 1);
<> 144:ef7eb2e8f9f7 339
<> 144:ef7eb2e8f9f7 340 // Renable UART
<> 144:ef7eb2e8f9f7 341 switch (((UARTName)(obj->uart))) {
<> 144:ef7eb2e8f9f7 342 case UART_0:
<> 144:ef7eb2e8f9f7 343 serial_pinout_tx(UART0_TX);
<> 144:ef7eb2e8f9f7 344 break;
<> 144:ef7eb2e8f9f7 345 case UART_1:
<> 144:ef7eb2e8f9f7 346 serial_pinout_tx(UART1_TX);
<> 144:ef7eb2e8f9f7 347 break;
<> 144:ef7eb2e8f9f7 348 default:
<> 144:ef7eb2e8f9f7 349 serial_pinout_tx((PinName)NC);
<> 144:ef7eb2e8f9f7 350 break;
<> 144:ef7eb2e8f9f7 351 }
<> 144:ef7eb2e8f9f7 352 }
<> 144:ef7eb2e8f9f7 353
<> 144:ef7eb2e8f9f7 354 //******************************************************************************
<> 144:ef7eb2e8f9f7 355 void serial_pinout_tx(PinName tx)
<> 144:ef7eb2e8f9f7 356 {
<> 144:ef7eb2e8f9f7 357 pinmap_pinout(tx, PinMap_UART_TX);
<> 144:ef7eb2e8f9f7 358 }
<> 144:ef7eb2e8f9f7 359
<> 144:ef7eb2e8f9f7 360
<> 144:ef7eb2e8f9f7 361 //******************************************************************************
<> 144:ef7eb2e8f9f7 362 void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow)
<> 144:ef7eb2e8f9f7 363 {
<> 144:ef7eb2e8f9f7 364 if(FlowControlNone == type) {
<> 144:ef7eb2e8f9f7 365 // Disable hardware flow control
<> 144:ef7eb2e8f9f7 366 obj->uart->ctrl &= ~(MXC_F_UART_CTRL_HW_FLOW_CTRL_EN);
<> 144:ef7eb2e8f9f7 367 return;
<> 144:ef7eb2e8f9f7 368 }
<> 144:ef7eb2e8f9f7 369
<> 144:ef7eb2e8f9f7 370 // Check to see if we can use HW flow control
<> 144:ef7eb2e8f9f7 371 UARTName uart_cts = (UARTName)pinmap_peripheral(txflow, PinMap_UART_CTS);
<> 144:ef7eb2e8f9f7 372 UARTName uart_rts = (UARTName)pinmap_peripheral(rxflow, PinMap_UART_RTS);
<> 144:ef7eb2e8f9f7 373 UARTName uart = (UARTName)pinmap_merge(uart_cts, uart_rts);
<> 144:ef7eb2e8f9f7 374
<> 144:ef7eb2e8f9f7 375 if((FlowControlCTS == type) || (FlowControlRTSCTS== type)) {
<> 144:ef7eb2e8f9f7 376 // Make sure pin is in the PinMap
<> 144:ef7eb2e8f9f7 377 MBED_ASSERT(uart_cts != (UARTName)NC);
<> 144:ef7eb2e8f9f7 378
<> 144:ef7eb2e8f9f7 379 // Enable the pin for CTS function
<> 144:ef7eb2e8f9f7 380 pinmap_pinout(txflow, PinMap_UART_CTS);
<> 144:ef7eb2e8f9f7 381 }
<> 144:ef7eb2e8f9f7 382
<> 144:ef7eb2e8f9f7 383 if((FlowControlRTS == type) || (FlowControlRTSCTS== type)) {
<> 144:ef7eb2e8f9f7 384 // Make sure pin is in the PinMap
<> 144:ef7eb2e8f9f7 385 MBED_ASSERT(uart_rts != (UARTName)NC);
<> 144:ef7eb2e8f9f7 386
<> 144:ef7eb2e8f9f7 387 // Enable the pin for RTS function
<> 144:ef7eb2e8f9f7 388 pinmap_pinout(rxflow, PinMap_UART_RTS);
<> 144:ef7eb2e8f9f7 389 }
<> 144:ef7eb2e8f9f7 390
<> 144:ef7eb2e8f9f7 391 if(FlowControlRTSCTS == type){
<> 144:ef7eb2e8f9f7 392 // Make sure that the pins are pointing to the same UART
<> 144:ef7eb2e8f9f7 393 MBED_ASSERT(uart != (UARTName)NC);
<> 144:ef7eb2e8f9f7 394 }
<> 144:ef7eb2e8f9f7 395
<> 144:ef7eb2e8f9f7 396 // Enable hardware flow control
<> 144:ef7eb2e8f9f7 397 obj->uart->ctrl |= MXC_F_UART_CTRL_HW_FLOW_CTRL_EN;
<> 144:ef7eb2e8f9f7 398 }