Analog Devices / platform_drivers

Platform drivers for Mbed.

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uart.cpp@17:af1f2416dd26, 2021-07-13 (annotated)

Committer:
mahphalke
Date:
Tue Jul 13 13:58:07 2021 +0530
Revision:
17:af1f2416dd26
Restructured the directory- Removed inc/ and src/ folders and moved all source/header files at root

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