Mahesh Phalke / platform_drivers

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uart.cpp@18:5ae03a197e59, 2021-08-02 (annotated)

Committer:
mahphalke
Date:
Mon Aug 02 16:03:08 2021 +0530
Revision:
18:5ae03a197e59
Parent:
17:af1f2416dd26 
Modified the ADC data capture module to remove dependancy on type of ADC and it's specific operations

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mahphalke 17:af1f2416dd26 1 /***************************************************************************//**
mahphalke 17:af1f2416dd26 2 * @file uart.cpp
mahphalke 17:af1f2416dd26 3 * @brief Implementation of UART Mbed platform driver interfaces
mahphalke 17:af1f2416dd26 4 ********************************************************************************
mahphalke 17:af1f2416dd26 5 * Copyright (c) 2021 Analog Devices, Inc.
mahphalke 17:af1f2416dd26 6 * All rights reserved.
mahphalke 17:af1f2416dd26 7 *
mahphalke 17:af1f2416dd26 8 * This software is proprietary to Analog Devices, Inc. and its licensors.
mahphalke 17:af1f2416dd26 9 * By using this software you agree to the terms of the associated
mahphalke 17:af1f2416dd26 10 * Analog Devices Software License Agreement.
mahphalke 17:af1f2416dd26 11 *******************************************************************************/
mahphalke 17:af1f2416dd26 12
mahphalke 17:af1f2416dd26 13 /******************************************************************************/
mahphalke 17:af1f2416dd26 14 /***************************** Include Files **********************************/
mahphalke 17:af1f2416dd26 15 /******************************************************************************/
mahphalke 17:af1f2416dd26 16 #include <stdio.h>
mahphalke 17:af1f2416dd26 17 #include <mbed.h>
mahphalke 17:af1f2416dd26 18 #include <USBCDC.h>
mahphalke 17:af1f2416dd26 19
mahphalke 17:af1f2416dd26 20 // Platform drivers needs to be C-compatible to work with other drivers
mahphalke 17:af1f2416dd26 21 #ifdef __cplusplus
mahphalke 17:af1f2416dd26 22 extern "C"
mahphalke 17:af1f2416dd26 23 {
mahphalke 17:af1f2416dd26 24 #endif // _cplusplus
mahphalke 17:af1f2416dd26 25
mahphalke 17:af1f2416dd26 26 #include "error.h"
mahphalke 17:af1f2416dd26 27 #include "delay.h"
mahphalke 17:af1f2416dd26 28 #include "uart.h"
mahphalke 17:af1f2416dd26 29 #include "uart_extra.h"
mahphalke 17:af1f2416dd26 30
mahphalke 17:af1f2416dd26 31 /******************************************************************************/
mahphalke 17:af1f2416dd26 32 /************************ Macros/Constants ************************************/
mahphalke 17:af1f2416dd26 33 /******************************************************************************/
mahphalke 17:af1f2416dd26 34
mahphalke 17:af1f2416dd26 35 /* Max size for USB CDC packet during transmit/receive */
mahphalke 17:af1f2416dd26 36 #define USB_CDC_MAX_PACKET_SIZE (64)
mahphalke 17:af1f2416dd26 37
mahphalke 17:af1f2416dd26 38 /* Max allowed length of USB serial number in characters */
mahphalke 17:af1f2416dd26 39 #define USB_SERIAL_NUM_MAX_LENGTH (100)
mahphalke 17:af1f2416dd26 40
mahphalke 17:af1f2416dd26 41 /******************************************************************************/
mahphalke 17:af1f2416dd26 42 /*************************** Types Declarations *******************************/
mahphalke 17:af1f2416dd26 43 /******************************************************************************/
mahphalke 17:af1f2416dd26 44
mahphalke 17:af1f2416dd26 45 /* Derived USBCDC class to access protected members of USBCDC class */
mahphalke 17:af1f2416dd26 46 class platform_usbcdc :public USBCDC
mahphalke 17:af1f2416dd26 47 {
mahphalke 17:af1f2416dd26 48 private:
mahphalke 17:af1f2416dd26 49 uint8_t usb_iserial_descriptor[(USB_SERIAL_NUM_MAX_LENGTH * 2) + 2];
mahphalke 17:af1f2416dd26 50
mahphalke 17:af1f2416dd26 51 public :
mahphalke 17:af1f2416dd26 52 /* Call parent class (USBCDC) constructor explicitly */
mahphalke 17:af1f2416dd26 53 platform_usbcdc(bool connect_blocking, uint16_t vendor_id, uint16_t product_id,
mahphalke 17:af1f2416dd26 54 const char *serial_number)
mahphalke 17:af1f2416dd26 55 : USBCDC(connect_blocking, vendor_id, product_id)
mahphalke 17:af1f2416dd26 56 {
mahphalke 17:af1f2416dd26 57 uint8_t usb_iserial_len; // USB serial number length
mahphalke 17:af1f2416dd26 58 uint8_t i, j = 0;
mahphalke 17:af1f2416dd26 59
mahphalke 17:af1f2416dd26 60 usb_iserial_len = strlen(serial_number);
mahphalke 17:af1f2416dd26 61 if (usb_iserial_len > USB_SERIAL_NUM_MAX_LENGTH) {
mahphalke 17:af1f2416dd26 62 usb_iserial_len = USB_SERIAL_NUM_MAX_LENGTH;
mahphalke 17:af1f2416dd26 63 }
mahphalke 17:af1f2416dd26 64
mahphalke 17:af1f2416dd26 65 this->usb_iserial_descriptor[j++] = (usb_iserial_len * 2) + 2; /* bLength */
mahphalke 17:af1f2416dd26 66 this->usb_iserial_descriptor[j++] = STRING_DESCRIPTOR; /* bDescriptorType */
mahphalke 17:af1f2416dd26 67
mahphalke 17:af1f2416dd26 68 /* bString iSerial */
mahphalke 17:af1f2416dd26 69 for (i = 0; i < usb_iserial_len; i++) {
mahphalke 17:af1f2416dd26 70 this->usb_iserial_descriptor[j++] = serial_number[i];
mahphalke 17:af1f2416dd26 71 this->usb_iserial_descriptor[j++] = 0;
mahphalke 17:af1f2416dd26 72 }
mahphalke 17:af1f2416dd26 73 }
mahphalke 17:af1f2416dd26 74
mahphalke 17:af1f2416dd26 75 /* Override the virtual function that sets the USB serial number
mahphalke 17:af1f2416dd26 76 * The custom (user provided) USB serial number is passed through this function */
mahphalke 17:af1f2416dd26 77 virtual const uint8_t *string_iserial_desc()
mahphalke 17:af1f2416dd26 78 {
mahphalke 17:af1f2416dd26 79 return this->usb_iserial_descriptor;
mahphalke 17:af1f2416dd26 80 }
mahphalke 17:af1f2416dd26 81
mahphalke 17:af1f2416dd26 82 void change_terminal_connection(bool connect_status);
mahphalke 17:af1f2416dd26 83 bool data_received(uint32_t rx_size);
mahphalke 17:af1f2416dd26 84 bool data_transmited(void);
mahphalke 17:af1f2416dd26 85 };
mahphalke 17:af1f2416dd26 86
mahphalke 17:af1f2416dd26 87 /******************************************************************************/
mahphalke 17:af1f2416dd26 88 /************************ Functions Definitions *******************************/
mahphalke 17:af1f2416dd26 89 /******************************************************************************/
mahphalke 17:af1f2416dd26 90
mahphalke 17:af1f2416dd26 91 /**
mahphalke 17:af1f2416dd26 92 * @brief Change the terminal connection status (for non-terminal) based USB interface
mahphalke 17:af1f2416dd26 93 * @param connect_status- new connection status
mahphalke 17:af1f2416dd26 94 * @note This functions is used to change the terminal connection status of USB client
mahphalke 17:af1f2416dd26 95 * interface which is different than the 'console terminal'. The console terminals acknowledge
mahphalke 17:af1f2416dd26 96 * back to USB host when USB connection is opened on the console terminal and Mbed USBCDC
mahphalke 17:af1f2416dd26 97 * class automatically changes the '_terminal_connected' status accordingly. However, for
mahphalke 17:af1f2416dd26 98 * custom PC applications (non terminal), the terminal connection status needs to be changed
mahphalke 17:af1f2416dd26 99 * manually. The '_terminal_connected' is protected member of USBCDC parent class and thus can
mahphalke 17:af1f2416dd26 100 * be accessed through 'platform_usbcdc' derived class using below function.
mahphalke 17:af1f2416dd26 101 */
mahphalke 17:af1f2416dd26 102 void platform_usbcdc::change_terminal_connection(bool connect_status)
mahphalke 17:af1f2416dd26 103 {
mahphalke 17:af1f2416dd26 104 _terminal_connected = connect_status;
mahphalke 17:af1f2416dd26 105 }
mahphalke 17:af1f2416dd26 106
mahphalke 17:af1f2416dd26 107
mahphalke 17:af1f2416dd26 108 /**
mahphalke 17:af1f2416dd26 109 * @brief Check if new USB data is received/available
mahphalke 17:af1f2416dd26 110 * @param bytes[in] - Number of expected bytes to be received
mahphalke 17:af1f2416dd26 111 * @return true if expected number of bytes received, else false
mahphalke 17:af1f2416dd26 112 */
mahphalke 17:af1f2416dd26 113 bool platform_usbcdc::data_received(uint32_t bytes)
mahphalke 17:af1f2416dd26 114 {
mahphalke 17:af1f2416dd26 115 volatile static uint32_t *rx_size = &_rx_size;
mahphalke 17:af1f2416dd26 116
mahphalke 17:af1f2416dd26 117 if (*rx_size >= bytes) {
mahphalke 17:af1f2416dd26 118 return true;
mahphalke 17:af1f2416dd26 119 } else {
mahphalke 17:af1f2416dd26 120 return false;
mahphalke 17:af1f2416dd26 121 }
mahphalke 17:af1f2416dd26 122 }
mahphalke 17:af1f2416dd26 123
mahphalke 17:af1f2416dd26 124
mahphalke 17:af1f2416dd26 125 /**
mahphalke 17:af1f2416dd26 126 * @brief Check if old USB data was transmitted
mahphalke 17:af1f2416dd26 127 * @return true if transmit not in progress, else false
mahphalke 17:af1f2416dd26 128 */
mahphalke 17:af1f2416dd26 129 bool platform_usbcdc::data_transmited(void)
mahphalke 17:af1f2416dd26 130 {
mahphalke 17:af1f2416dd26 131 volatile static bool *tx_in_progress = &_tx_in_progress;
mahphalke 17:af1f2416dd26 132
mahphalke 17:af1f2416dd26 133 if (*tx_in_progress) {
mahphalke 17:af1f2416dd26 134 return false;
mahphalke 17:af1f2416dd26 135 } else {
mahphalke 17:af1f2416dd26 136 return true;
mahphalke 17:af1f2416dd26 137 }
mahphalke 17:af1f2416dd26 138 }
mahphalke 17:af1f2416dd26 139
mahphalke 17:af1f2416dd26 140
mahphalke 17:af1f2416dd26 141 /**
mahphalke 17:af1f2416dd26 142 * @brief Read data from UART device.
mahphalke 17:af1f2416dd26 143 * @param desc - Instance of UART.
mahphalke 17:af1f2416dd26 144 * @param data - Pointer to buffer containing data.
mahphalke 17:af1f2416dd26 145 * @param bytes_number - Number of bytes to read.
mahphalke 17:af1f2416dd26 146 * @return SUCCESS in case of success, FAILURE otherwise.
mahphalke 17:af1f2416dd26 147 */
mahphalke 17:af1f2416dd26 148 int32_t uart_read(struct uart_desc *desc, uint8_t *data, uint32_t bytes_number)
mahphalke 17:af1f2416dd26 149 {
mahphalke 17:af1f2416dd26 150 uint8_t cnt;
mahphalke 17:af1f2416dd26 151 mbed::UnbufferedSerial *uart; // pointer to UnbufferedSerial/UART instance
mahphalke 17:af1f2416dd26 152 platform_usbcdc *usb_cdc_dev; // Pointer to usb cdc device class instance
mahphalke 17:af1f2416dd26 153 uint32_t size_rd;
mahphalke 17:af1f2416dd26 154
mahphalke 17:af1f2416dd26 155 if (desc && data) {
mahphalke 17:af1f2416dd26 156 if (((mbed_uart_desc *)(desc->extra))->uart_port) {
mahphalke 17:af1f2416dd26 157 if (((mbed_uart_desc *)desc->extra)->virtual_com_enable) {
mahphalke 17:af1f2416dd26 158 usb_cdc_dev = (platform_usbcdc *)((mbed_uart_desc *)(
mahphalke 17:af1f2416dd26 159 desc->extra))->uart_port;
mahphalke 17:af1f2416dd26 160
mahphalke 17:af1f2416dd26 161 while (!usb_cdc_dev->data_received(bytes_number)) {
mahphalke 17:af1f2416dd26 162 /* Wait until new data is available */
mahphalke 17:af1f2416dd26 163 }
mahphalke 17:af1f2416dd26 164
mahphalke 17:af1f2416dd26 165 /* Change terminal connection status manually */
mahphalke 17:af1f2416dd26 166 usb_cdc_dev->change_terminal_connection(true);
mahphalke 17:af1f2416dd26 167
mahphalke 17:af1f2416dd26 168 usb_cdc_dev->receive_nb(data, bytes_number, &size_rd);
mahphalke 17:af1f2416dd26 169 } else {
mahphalke 17:af1f2416dd26 170 uart = (UnbufferedSerial *)(((mbed_uart_desc *)(desc->extra))->uart_port);
mahphalke 17:af1f2416dd26 171
mahphalke 17:af1f2416dd26 172 for (cnt = 0; cnt < bytes_number; cnt++) {
mahphalke 17:af1f2416dd26 173 uart->read(data + cnt, 1);
mahphalke 17:af1f2416dd26 174 }
mahphalke 17:af1f2416dd26 175 }
mahphalke 17:af1f2416dd26 176
mahphalke 17:af1f2416dd26 177 return bytes_number;
mahphalke 17:af1f2416dd26 178 }
mahphalke 17:af1f2416dd26 179 }
mahphalke 17:af1f2416dd26 180
mahphalke 17:af1f2416dd26 181 return FAILURE;
mahphalke 17:af1f2416dd26 182 }
mahphalke 17:af1f2416dd26 183
mahphalke 17:af1f2416dd26 184
mahphalke 17:af1f2416dd26 185 /**
mahphalke 17:af1f2416dd26 186 * @brief Write data to UART device.
mahphalke 17:af1f2416dd26 187 * @param desc - Instance of UART.
mahphalke 17:af1f2416dd26 188 * @param data - Pointer to buffer containing data.
mahphalke 17:af1f2416dd26 189 * @param bytes_number - Number of bytes to read.
mahphalke 17:af1f2416dd26 190 * @return SUCCESS in case of success, FAILURE otherwise.
mahphalke 17:af1f2416dd26 191 */
mahphalke 17:af1f2416dd26 192 int32_t uart_write(struct uart_desc *desc, const uint8_t *data,
mahphalke 17:af1f2416dd26 193 uint32_t bytes_number)
mahphalke 17:af1f2416dd26 194 {
mahphalke 17:af1f2416dd26 195 mbed::UnbufferedSerial *uart; // pointer to UnbufferedSerial/UART instance
mahphalke 17:af1f2416dd26 196 platform_usbcdc *usb_cdc_dev; // Pointer to usb cdc device class instance
mahphalke 17:af1f2416dd26 197 uint32_t d_sz;
mahphalke 17:af1f2416dd26 198 uint32_t indx = 0;
mahphalke 17:af1f2416dd26 199
mahphalke 17:af1f2416dd26 200 if (desc && data) {
mahphalke 17:af1f2416dd26 201 if (((mbed_uart_desc *)(desc->extra))->uart_port) {
mahphalke 17:af1f2416dd26 202 if (((mbed_uart_desc *)desc->extra)->virtual_com_enable) {
mahphalke 17:af1f2416dd26 203 usb_cdc_dev = (platform_usbcdc *)((mbed_uart_desc *)(
mahphalke 17:af1f2416dd26 204 desc->extra))->uart_port;
mahphalke 17:af1f2416dd26 205
mahphalke 17:af1f2416dd26 206 while (bytes_number) {
mahphalke 17:af1f2416dd26 207 while (!usb_cdc_dev->data_transmited()) {
mahphalke 17:af1f2416dd26 208 /* Wait until old data is transmitted */
mahphalke 17:af1f2416dd26 209 }
mahphalke 17:af1f2416dd26 210
mahphalke 17:af1f2416dd26 211 /* Make sure packet size is less than max CDC packet size during data transmit */
mahphalke 17:af1f2416dd26 212 d_sz = (bytes_number > (USB_CDC_MAX_PACKET_SIZE - 1)) ?
mahphalke 17:af1f2416dd26 213 (USB_CDC_MAX_PACKET_SIZE - 1) :
mahphalke 17:af1f2416dd26 214 bytes_number;
mahphalke 17:af1f2416dd26 215
mahphalke 17:af1f2416dd26 216 /* Change terminal connection status manually */
mahphalke 17:af1f2416dd26 217 usb_cdc_dev->change_terminal_connection(true);
mahphalke 17:af1f2416dd26 218
mahphalke 17:af1f2416dd26 219 usb_cdc_dev->send_nb((uint8_t *)&data[indx], d_sz, &d_sz);
mahphalke 17:af1f2416dd26 220
mahphalke 17:af1f2416dd26 221 bytes_number -= d_sz;
mahphalke 17:af1f2416dd26 222 indx += d_sz;
mahphalke 17:af1f2416dd26 223 }
mahphalke 17:af1f2416dd26 224
mahphalke 17:af1f2416dd26 225 return bytes_number;
mahphalke 17:af1f2416dd26 226 } else {
mahphalke 17:af1f2416dd26 227 uart = (UnbufferedSerial *)(((mbed_uart_desc *)(desc->extra))->uart_port);
mahphalke 17:af1f2416dd26 228 return uart->write(data, bytes_number);
mahphalke 17:af1f2416dd26 229 }
mahphalke 17:af1f2416dd26 230 }
mahphalke 17:af1f2416dd26 231 }
mahphalke 17:af1f2416dd26 232
mahphalke 17:af1f2416dd26 233 return FAILURE;
mahphalke 17:af1f2416dd26 234 }
mahphalke 17:af1f2416dd26 235
mahphalke 17:af1f2416dd26 236
mahphalke 17:af1f2416dd26 237 /**
mahphalke 17:af1f2416dd26 238 * @brief Submit reading buffer to the UART driver.
mahphalke 17:af1f2416dd26 239 *
mahphalke 17:af1f2416dd26 240 * Buffer is used until bytes_number bytes are read.
mahphalke 17:af1f2416dd26 241 * @param desc: Descriptor of the UART device
mahphalke 17:af1f2416dd26 242 * @param data: Buffer where data will be read
mahphalke 17:af1f2416dd26 243 * @param bytes_number: Number of bytes to be read.
mahphalke 17:af1f2416dd26 244 * @return \ref SUCCESS in case of success, \ref FAILURE otherwise.
mahphalke 17:af1f2416dd26 245 */
mahphalke 17:af1f2416dd26 246 int32_t uart_read_nonblocking(struct uart_desc *desc,
mahphalke 17:af1f2416dd26 247 uint8_t *data,
mahphalke 17:af1f2416dd26 248 uint32_t bytes_number)
mahphalke 17:af1f2416dd26 249 {
mahphalke 17:af1f2416dd26 250 mbed::UnbufferedSerial *uart; // pointer to UnbufferedSerial/UART instance
mahphalke 17:af1f2416dd26 251
mahphalke 17:af1f2416dd26 252 if (desc) {
mahphalke 17:af1f2416dd26 253 if (((mbed_uart_desc *)(desc->extra))->uart_port) {
mahphalke 17:af1f2416dd26 254 uart = (UnbufferedSerial *)(((mbed_uart_desc *)(desc->extra))->uart_port);
mahphalke 17:af1f2416dd26 255
mahphalke 17:af1f2416dd26 256 if (data) {
mahphalke 17:af1f2416dd26 257 for (size_t i = 0; i < bytes_number; i++) {
mahphalke 17:af1f2416dd26 258 if (uart->readable() > 0) {
mahphalke 17:af1f2416dd26 259 uart->read(&data[i], 1);
mahphalke 17:af1f2416dd26 260 }
mahphalke 17:af1f2416dd26 261 }
mahphalke 17:af1f2416dd26 262
mahphalke 17:af1f2416dd26 263 return bytes_number;
mahphalke 17:af1f2416dd26 264 }
mahphalke 17:af1f2416dd26 265 }
mahphalke 17:af1f2416dd26 266 }
mahphalke 17:af1f2416dd26 267
mahphalke 17:af1f2416dd26 268 return FAILURE;
mahphalke 17:af1f2416dd26 269 }
mahphalke 17:af1f2416dd26 270
mahphalke 17:af1f2416dd26 271
mahphalke 17:af1f2416dd26 272 /**
mahphalke 17:af1f2416dd26 273 * @brief Submit writting buffer to the UART driver.
mahphalke 17:af1f2416dd26 274 *
mahphalke 17:af1f2416dd26 275 * Data from the buffer is sent over the UART, the function returns imediatly.
mahphalke 17:af1f2416dd26 276 * @param desc: Descriptor of the UART device
mahphalke 17:af1f2416dd26 277 * @param data: Buffer where data will be written
mahphalke 17:af1f2416dd26 278 * @param bytes_number: Number of bytes to be written.
mahphalke 17:af1f2416dd26 279 * @return \ref SUCCESS in case of success, \ref FAILURE otherwise.
mahphalke 17:af1f2416dd26 280 */
mahphalke 17:af1f2416dd26 281 int32_t uart_write_nonblocking(struct uart_desc *desc,
mahphalke 17:af1f2416dd26 282 const uint8_t *data,
mahphalke 17:af1f2416dd26 283 uint32_t bytes_number)
mahphalke 17:af1f2416dd26 284 {
mahphalke 17:af1f2416dd26 285 mbed::UnbufferedSerial *uart; // pointer to UnbufferedSerial/UART instance
mahphalke 17:af1f2416dd26 286
mahphalke 17:af1f2416dd26 287 if (desc) {
mahphalke 17:af1f2416dd26 288 if (((mbed_uart_desc *)(desc->extra))->uart_port) {
mahphalke 17:af1f2416dd26 289 uart = (UnbufferedSerial *)(((mbed_uart_desc *)(desc->extra))->uart_port);
mahphalke 17:af1f2416dd26 290
mahphalke 17:af1f2416dd26 291 if (data) {
mahphalke 17:af1f2416dd26 292 for (size_t i = 0; i < bytes_number; i++) {
mahphalke 17:af1f2416dd26 293 uart->write(&data[i], 1);
mahphalke 17:af1f2416dd26 294 }
mahphalke 17:af1f2416dd26 295
mahphalke 17:af1f2416dd26 296 return bytes_number;
mahphalke 17:af1f2416dd26 297 }
mahphalke 17:af1f2416dd26 298 }
mahphalke 17:af1f2416dd26 299 }
mahphalke 17:af1f2416dd26 300
mahphalke 17:af1f2416dd26 301 return FAILURE;
mahphalke 17:af1f2416dd26 302 }
mahphalke 17:af1f2416dd26 303
mahphalke 17:af1f2416dd26 304
mahphalke 17:af1f2416dd26 305 /**
mahphalke 17:af1f2416dd26 306 * @brief Initialize the UART communication peripheral.
mahphalke 17:af1f2416dd26 307 * @param desc - The UART descriptor.
mahphalke 17:af1f2416dd26 308 * @param param - The structure that contains the UART parameters.
mahphalke 17:af1f2416dd26 309 * @return SUCCESS in case of success, FAILURE otherwise.
mahphalke 17:af1f2416dd26 310 */
mahphalke 17:af1f2416dd26 311 int32_t uart_init(struct uart_desc **desc, struct uart_init_param *param)
mahphalke 17:af1f2416dd26 312 {
mahphalke 17:af1f2416dd26 313 mbed::UnbufferedSerial *uart; // Pointer to new UnbufferedSerial/UART instance
mahphalke 17:af1f2416dd26 314 platform_usbcdc *usb_cdc_dev; // Pointer to usb cdc device class instance
mahphalke 17:af1f2416dd26 315 mbed_uart_desc *mbed_desc; // Pointer to mbed uart descriptor
mahphalke 17:af1f2416dd26 316 uart_desc *new_desc; // UART new descriptor
mahphalke 17:af1f2416dd26 317
mahphalke 17:af1f2416dd26 318 if (desc && param && param->extra) {
mahphalke 17:af1f2416dd26 319 // Create the UART description object for the device
mahphalke 17:af1f2416dd26 320 new_desc = (uart_desc *)malloc(sizeof(uart_desc));
mahphalke 17:af1f2416dd26 321 if (!new_desc) {
mahphalke 17:af1f2416dd26 322 goto err_new_desc;
mahphalke 17:af1f2416dd26 323 }
mahphalke 17:af1f2416dd26 324
mahphalke 17:af1f2416dd26 325 new_desc->baud_rate = param->baud_rate;
mahphalke 17:af1f2416dd26 326
mahphalke 17:af1f2416dd26 327 if (((mbed_uart_init_param *)param->extra)->virtual_com_enable) {
mahphalke 17:af1f2416dd26 328 // Create a new instance of platform_usbcdc class
mahphalke 17:af1f2416dd26 329 usb_cdc_dev = new platform_usbcdc(false,
mahphalke 17:af1f2416dd26 330 ((mbed_uart_init_param *)param->extra)->vendor_id,
mahphalke 17:af1f2416dd26 331 ((mbed_uart_init_param *)param->extra)->product_id,
mahphalke 17:af1f2416dd26 332 ((mbed_uart_init_param *)param->extra)->serial_number);
mahphalke 17:af1f2416dd26 333 if (!usb_cdc_dev) {
mahphalke 17:af1f2416dd26 334 goto err_usb_cdc_dev;
mahphalke 17:af1f2416dd26 335 }
mahphalke 17:af1f2416dd26 336 } else {
mahphalke 17:af1f2416dd26 337 // Create and configure a new instance of UnbufferedSerial/UART port
mahphalke 17:af1f2416dd26 338 uart = new UnbufferedSerial(
mahphalke 17:af1f2416dd26 339 (PinName)(((mbed_uart_init_param *)param->extra)->uart_tx_pin),
mahphalke 17:af1f2416dd26 340 (PinName)(((mbed_uart_init_param *)param->extra)->uart_rx_pin),
mahphalke 17:af1f2416dd26 341 (int)param->baud_rate);
mahphalke 17:af1f2416dd26 342
mahphalke 17:af1f2416dd26 343 if (!uart) {
mahphalke 17:af1f2416dd26 344 goto err_uart;
mahphalke 17:af1f2416dd26 345 }
mahphalke 17:af1f2416dd26 346 }
mahphalke 17:af1f2416dd26 347
mahphalke 17:af1f2416dd26 348 // Create a new mbed descriptor to store new UART instances
mahphalke 17:af1f2416dd26 349 mbed_desc = (mbed_uart_desc *)malloc(sizeof(mbed_uart_desc));
mahphalke 17:af1f2416dd26 350 if (!mbed_desc) {
mahphalke 17:af1f2416dd26 351 goto err_mbed_desc;
mahphalke 17:af1f2416dd26 352 }
mahphalke 17:af1f2416dd26 353
mahphalke 17:af1f2416dd26 354 if (((mbed_uart_init_param *)param->extra)->virtual_com_enable) {
mahphalke 17:af1f2416dd26 355 mbed_desc->uart_port = (platform_usbcdc *)usb_cdc_dev;
mahphalke 17:af1f2416dd26 356
mahphalke 17:af1f2416dd26 357 /* Establish connection with the USB CDC communication port */
mahphalke 17:af1f2416dd26 358 usb_cdc_dev->connect();
mahphalke 17:af1f2416dd26 359 mdelay(2000);
mahphalke 17:af1f2416dd26 360 } else {
mahphalke 17:af1f2416dd26 361 mbed_desc->uart_port = (UnbufferedSerial *)uart;
mahphalke 17:af1f2416dd26 362 }
mahphalke 17:af1f2416dd26 363
mahphalke 17:af1f2416dd26 364 mbed_desc->virtual_com_enable = ((mbed_uart_init_param *)
mahphalke 17:af1f2416dd26 365 param->extra)->virtual_com_enable;
mahphalke 17:af1f2416dd26 366 new_desc->extra = (mbed_uart_desc *)mbed_desc;
mahphalke 17:af1f2416dd26 367 *desc = new_desc;
mahphalke 17:af1f2416dd26 368
mahphalke 17:af1f2416dd26 369 return SUCCESS;
mahphalke 17:af1f2416dd26 370 }
mahphalke 17:af1f2416dd26 371
mahphalke 17:af1f2416dd26 372 err_mbed_desc:
mahphalke 17:af1f2416dd26 373 if (uart) {
mahphalke 17:af1f2416dd26 374 free(uart);
mahphalke 17:af1f2416dd26 375 }
mahphalke 17:af1f2416dd26 376 if (usb_cdc_dev) {
mahphalke 17:af1f2416dd26 377 free(usb_cdc_dev);
mahphalke 17:af1f2416dd26 378 }
mahphalke 17:af1f2416dd26 379 err_uart:
mahphalke 17:af1f2416dd26 380 err_usb_cdc_dev:
mahphalke 17:af1f2416dd26 381 free(new_desc);
mahphalke 17:af1f2416dd26 382 err_new_desc:
mahphalke 17:af1f2416dd26 383 // Nothing to free
mahphalke 17:af1f2416dd26 384
mahphalke 17:af1f2416dd26 385 return FAILURE;
mahphalke 17:af1f2416dd26 386 }
mahphalke 17:af1f2416dd26 387
mahphalke 17:af1f2416dd26 388
mahphalke 17:af1f2416dd26 389 /**
mahphalke 17:af1f2416dd26 390 * @brief Free the resources allocated by uart_init().
mahphalke 17:af1f2416dd26 391 * @param desc - The UART descriptor.
mahphalke 17:af1f2416dd26 392 * @return SUCCESS in case of success, FAILURE otherwise.
mahphalke 17:af1f2416dd26 393 */
mahphalke 17:af1f2416dd26 394 int32_t uart_remove(struct uart_desc *desc)
mahphalke 17:af1f2416dd26 395 {
mahphalke 17:af1f2416dd26 396 if (desc) {
mahphalke 17:af1f2416dd26 397 // Free the UART port object
mahphalke 17:af1f2416dd26 398 if (((mbed_uart_desc *)desc->extra)->virtual_com_enable) {
mahphalke 17:af1f2416dd26 399 if ((platform_usbcdc *)((mbed_uart_desc *)desc->extra)->uart_port)
mahphalke 17:af1f2416dd26 400 delete((platform_usbcdc *)(platform_usbcdc *)((mbed_uart_desc *)
mahphalke 17:af1f2416dd26 401 desc->extra)->uart_port);
mahphalke 17:af1f2416dd26 402 } else {
mahphalke 17:af1f2416dd26 403 if ((UnbufferedSerial *)(((mbed_uart_desc *)(desc->extra))->uart_port)) {
mahphalke 17:af1f2416dd26 404 delete((UnbufferedSerial *)(((mbed_uart_desc *)(desc->extra))->uart_port));
mahphalke 17:af1f2416dd26 405 }
mahphalke 17:af1f2416dd26 406 }
mahphalke 17:af1f2416dd26 407
mahphalke 17:af1f2416dd26 408 // Free the UART extra descriptor object
mahphalke 17:af1f2416dd26 409 if ((mbed_uart_desc *)(desc->extra)) {
mahphalke 17:af1f2416dd26 410 free((mbed_uart_desc *)(desc->extra));
mahphalke 17:af1f2416dd26 411 }
mahphalke 17:af1f2416dd26 412
mahphalke 17:af1f2416dd26 413 // Free the UART descriptor object
mahphalke 17:af1f2416dd26 414 free(desc);
mahphalke 17:af1f2416dd26 415
mahphalke 17:af1f2416dd26 416 return SUCCESS;
mahphalke 17:af1f2416dd26 417 }
mahphalke 17:af1f2416dd26 418
mahphalke 17:af1f2416dd26 419 return FAILURE;
mahphalke 17:af1f2416dd26 420 }
mahphalke 17:af1f2416dd26 421
mahphalke 17:af1f2416dd26 422
mahphalke 17:af1f2416dd26 423 /**
mahphalke 17:af1f2416dd26 424 * @brief Get number of UART errors.
mahphalke 17:af1f2416dd26 425 * @param desc - The UART descriptor.
mahphalke 17:af1f2416dd26 426 * @return number of errors.
mahphalke 17:af1f2416dd26 427 */
mahphalke 17:af1f2416dd26 428 uint32_t uart_get_errors(struct uart_desc *desc)
mahphalke 17:af1f2416dd26 429 {
mahphalke 17:af1f2416dd26 430 if (desc) {
mahphalke 17:af1f2416dd26 431 // Unused variable - fix compiler warning
mahphalke 17:af1f2416dd26 432 }
mahphalke 17:af1f2416dd26 433
mahphalke 17:af1f2416dd26 434 return SUCCESS;
mahphalke 17:af1f2416dd26 435 }
mahphalke 17:af1f2416dd26 436
mahphalke 17:af1f2416dd26 437 #ifdef __cplusplus // Closing extern c
mahphalke 17:af1f2416dd26 438 }
mahphalke 17:af1f2416dd26 439 #endif // _cplusplus