mbed library sources
Fork of mbed-src by
targets/hal/TARGET_Atmel/TARGET_SAM21/drivers/sercom/usart/usart_interrupt.c@592:a274ee790e56, 2015-07-17 (annotated)
- Committer:
- mbed_official
- Date:
- Fri Jul 17 09:15:10 2015 +0100
- Revision:
- 592:a274ee790e56
- Parent:
- 579:53297373a894
Synchronized with git revision e7144f83a8d75df80c4877936b6ffe552b0be9e6
Full URL: https://github.com/mbedmicro/mbed/commit/e7144f83a8d75df80c4877936b6ffe552b0be9e6/
More API implementation for SAMR21
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 579:53297373a894 | 1 | #include "usart_interrupt.h" |
mbed_official | 579:53297373a894 | 2 | |
mbed_official | 579:53297373a894 | 3 | /** |
mbed_official | 579:53297373a894 | 4 | * \internal |
mbed_official | 579:53297373a894 | 5 | * Asynchronous write of a buffer with a given length |
mbed_official | 579:53297373a894 | 6 | * |
mbed_official | 579:53297373a894 | 7 | * \param[in] module Pointer to USART software instance struct |
mbed_official | 579:53297373a894 | 8 | * \param[in] tx_data Pointer to data to be transmitted |
mbed_official | 579:53297373a894 | 9 | * \param[in] length Length of data buffer |
mbed_official | 579:53297373a894 | 10 | * |
mbed_official | 579:53297373a894 | 11 | */ |
mbed_official | 579:53297373a894 | 12 | void _usart_write_buffer( |
mbed_official | 579:53297373a894 | 13 | struct usart_module *const module, |
mbed_official | 579:53297373a894 | 14 | uint8_t *tx_data, |
mbed_official | 579:53297373a894 | 15 | uint16_t length) |
mbed_official | 579:53297373a894 | 16 | { |
mbed_official | 579:53297373a894 | 17 | /* Sanity check arguments */ |
mbed_official | 579:53297373a894 | 18 | Assert(module); |
mbed_official | 579:53297373a894 | 19 | Assert(module->hw); |
mbed_official | 579:53297373a894 | 20 | |
mbed_official | 579:53297373a894 | 21 | /* Get a pointer to the hardware module instance */ |
mbed_official | 579:53297373a894 | 22 | SercomUsart *const usart_hw = &(module->hw->USART); |
mbed_official | 579:53297373a894 | 23 | |
mbed_official | 579:53297373a894 | 24 | /* Write parameters to the device instance */ |
mbed_official | 579:53297373a894 | 25 | module->remaining_tx_buffer_length = length; |
mbed_official | 579:53297373a894 | 26 | module->tx_buffer_ptr = tx_data; |
mbed_official | 579:53297373a894 | 27 | module->tx_status = STATUS_BUSY; |
mbed_official | 579:53297373a894 | 28 | |
mbed_official | 579:53297373a894 | 29 | /* Enable the Data Register Empty Interrupt */ |
mbed_official | 579:53297373a894 | 30 | usart_hw->INTENSET.reg = SERCOM_USART_INTFLAG_DRE; |
mbed_official | 579:53297373a894 | 31 | } |
mbed_official | 579:53297373a894 | 32 | |
mbed_official | 579:53297373a894 | 33 | /** |
mbed_official | 579:53297373a894 | 34 | * \internal |
mbed_official | 579:53297373a894 | 35 | * Asynchronous read of a buffer with a given length |
mbed_official | 579:53297373a894 | 36 | * |
mbed_official | 579:53297373a894 | 37 | * \param[in] module Pointer to USART software instance struct |
mbed_official | 579:53297373a894 | 38 | * \param[in] rx_data Pointer to data to be received |
mbed_official | 579:53297373a894 | 39 | * \param[in] length Length of data buffer |
mbed_official | 579:53297373a894 | 40 | * |
mbed_official | 579:53297373a894 | 41 | */ |
mbed_official | 579:53297373a894 | 42 | void _usart_read_buffer( |
mbed_official | 579:53297373a894 | 43 | struct usart_module *const module, |
mbed_official | 579:53297373a894 | 44 | uint8_t *rx_data, |
mbed_official | 579:53297373a894 | 45 | uint16_t length) |
mbed_official | 579:53297373a894 | 46 | { |
mbed_official | 579:53297373a894 | 47 | /* Sanity check arguments */ |
mbed_official | 579:53297373a894 | 48 | Assert(module); |
mbed_official | 579:53297373a894 | 49 | Assert(module->hw); |
mbed_official | 579:53297373a894 | 50 | |
mbed_official | 579:53297373a894 | 51 | /* Get a pointer to the hardware module instance */ |
mbed_official | 579:53297373a894 | 52 | SercomUsart *const usart_hw = &(module->hw->USART); |
mbed_official | 579:53297373a894 | 53 | |
mbed_official | 579:53297373a894 | 54 | /* Set length for the buffer and the pointer, and let |
mbed_official | 579:53297373a894 | 55 | * the interrupt handler do the rest */ |
mbed_official | 579:53297373a894 | 56 | module->remaining_rx_buffer_length = length; |
mbed_official | 579:53297373a894 | 57 | module->rx_buffer_ptr = rx_data; |
mbed_official | 579:53297373a894 | 58 | module->rx_status = STATUS_BUSY; |
mbed_official | 579:53297373a894 | 59 | |
mbed_official | 579:53297373a894 | 60 | /* Enable the RX Complete Interrupt */ |
mbed_official | 579:53297373a894 | 61 | usart_hw->INTENSET.reg = SERCOM_USART_INTFLAG_RXC; |
mbed_official | 579:53297373a894 | 62 | |
mbed_official | 579:53297373a894 | 63 | #ifdef FEATURE_USART_LIN_SLAVE |
mbed_official | 579:53297373a894 | 64 | /* Enable the break character is received Interrupt */ |
mbed_official | 579:53297373a894 | 65 | if(module->lin_slave_enabled) { |
mbed_official | 579:53297373a894 | 66 | usart_hw->INTENSET.reg = SERCOM_USART_INTFLAG_RXBRK; |
mbed_official | 579:53297373a894 | 67 | } |
mbed_official | 579:53297373a894 | 68 | #endif |
mbed_official | 579:53297373a894 | 69 | |
mbed_official | 579:53297373a894 | 70 | #ifdef FEATURE_USART_START_FRAME_DECTION |
mbed_official | 579:53297373a894 | 71 | /* Enable a start condition is detected Interrupt */ |
mbed_official | 579:53297373a894 | 72 | if(module->start_frame_detection_enabled) { |
mbed_official | 579:53297373a894 | 73 | usart_hw->INTENSET.reg = SERCOM_USART_INTFLAG_RXS; |
mbed_official | 579:53297373a894 | 74 | } |
mbed_official | 579:53297373a894 | 75 | #endif |
mbed_official | 579:53297373a894 | 76 | } |
mbed_official | 579:53297373a894 | 77 | |
mbed_official | 579:53297373a894 | 78 | /** |
mbed_official | 579:53297373a894 | 79 | * \brief Registers a callback |
mbed_official | 579:53297373a894 | 80 | * |
mbed_official | 579:53297373a894 | 81 | * Registers a callback function which is implemented by the user. |
mbed_official | 579:53297373a894 | 82 | * |
mbed_official | 579:53297373a894 | 83 | * \note The callback must be enabled by \ref usart_enable_callback, |
mbed_official | 579:53297373a894 | 84 | * in order for the interrupt handler to call it when the conditions for |
mbed_official | 579:53297373a894 | 85 | * the callback type are met. |
mbed_official | 579:53297373a894 | 86 | * |
mbed_official | 579:53297373a894 | 87 | * \param[in] module Pointer to USART software instance struct |
mbed_official | 579:53297373a894 | 88 | * \param[in] callback_func Pointer to callback function |
mbed_official | 579:53297373a894 | 89 | * \param[in] callback_type Callback type given by an enum |
mbed_official | 579:53297373a894 | 90 | * |
mbed_official | 579:53297373a894 | 91 | */ |
mbed_official | 579:53297373a894 | 92 | void usart_register_callback( |
mbed_official | 579:53297373a894 | 93 | struct usart_module *const module, |
mbed_official | 579:53297373a894 | 94 | usart_callback_t callback_func, |
mbed_official | 579:53297373a894 | 95 | enum usart_callback callback_type) |
mbed_official | 579:53297373a894 | 96 | { |
mbed_official | 579:53297373a894 | 97 | /* Sanity check arguments */ |
mbed_official | 579:53297373a894 | 98 | Assert(module); |
mbed_official | 579:53297373a894 | 99 | Assert(callback_func); |
mbed_official | 579:53297373a894 | 100 | |
mbed_official | 579:53297373a894 | 101 | /* Register callback function */ |
mbed_official | 579:53297373a894 | 102 | module->callback[callback_type] = callback_func; |
mbed_official | 579:53297373a894 | 103 | |
mbed_official | 579:53297373a894 | 104 | /* Set the bit corresponding to the callback_type */ |
mbed_official | 579:53297373a894 | 105 | module->callback_reg_mask |= (1 << callback_type); |
mbed_official | 579:53297373a894 | 106 | } |
mbed_official | 579:53297373a894 | 107 | |
mbed_official | 579:53297373a894 | 108 | /** |
mbed_official | 579:53297373a894 | 109 | * \brief Unregisters a callback |
mbed_official | 579:53297373a894 | 110 | * |
mbed_official | 579:53297373a894 | 111 | * Unregisters a callback function which is implemented by the user. |
mbed_official | 579:53297373a894 | 112 | * |
mbed_official | 579:53297373a894 | 113 | * \param[in,out] module Pointer to USART software instance struct |
mbed_official | 579:53297373a894 | 114 | * \param[in] callback_type Callback type given by an enum |
mbed_official | 579:53297373a894 | 115 | * |
mbed_official | 579:53297373a894 | 116 | */ |
mbed_official | 579:53297373a894 | 117 | void usart_unregister_callback( |
mbed_official | 579:53297373a894 | 118 | struct usart_module *const module, |
mbed_official | 579:53297373a894 | 119 | enum usart_callback callback_type) |
mbed_official | 579:53297373a894 | 120 | { |
mbed_official | 579:53297373a894 | 121 | /* Sanity check arguments */ |
mbed_official | 579:53297373a894 | 122 | Assert(module); |
mbed_official | 579:53297373a894 | 123 | |
mbed_official | 579:53297373a894 | 124 | /* Unregister callback function */ |
mbed_official | 579:53297373a894 | 125 | module->callback[callback_type] = NULL; |
mbed_official | 579:53297373a894 | 126 | |
mbed_official | 579:53297373a894 | 127 | /* Clear the bit corresponding to the callback_type */ |
mbed_official | 579:53297373a894 | 128 | module->callback_reg_mask &= ~(1 << callback_type); |
mbed_official | 579:53297373a894 | 129 | } |
mbed_official | 579:53297373a894 | 130 | |
mbed_official | 579:53297373a894 | 131 | /** |
mbed_official | 579:53297373a894 | 132 | * \brief Asynchronous write a single char |
mbed_official | 579:53297373a894 | 133 | * |
mbed_official | 579:53297373a894 | 134 | * Sets up the driver to write the data given. If registered and enabled, |
mbed_official | 579:53297373a894 | 135 | * a callback function will be called when the transmit is completed. |
mbed_official | 579:53297373a894 | 136 | * |
mbed_official | 579:53297373a894 | 137 | * \param[in] module Pointer to USART software instance struct |
mbed_official | 579:53297373a894 | 138 | * \param[in] tx_data Data to transfer |
mbed_official | 579:53297373a894 | 139 | * |
mbed_official | 579:53297373a894 | 140 | * \returns Status of the operation. |
mbed_official | 579:53297373a894 | 141 | * \retval STATUS_OK If operation was completed |
mbed_official | 579:53297373a894 | 142 | * \retval STATUS_BUSY If operation was not completed, due to the |
mbed_official | 579:53297373a894 | 143 | * USART module being busy |
mbed_official | 579:53297373a894 | 144 | * \retval STATUS_ERR_DENIED If the transmitter is not enabled |
mbed_official | 579:53297373a894 | 145 | */ |
mbed_official | 579:53297373a894 | 146 | enum status_code usart_write_job( |
mbed_official | 579:53297373a894 | 147 | struct usart_module *const module, |
mbed_official | 579:53297373a894 | 148 | const uint16_t *tx_data) |
mbed_official | 579:53297373a894 | 149 | { |
mbed_official | 579:53297373a894 | 150 | /* Sanity check arguments */ |
mbed_official | 579:53297373a894 | 151 | Assert(module); |
mbed_official | 579:53297373a894 | 152 | Assert(tx_data); |
mbed_official | 579:53297373a894 | 153 | |
mbed_official | 579:53297373a894 | 154 | /* Check if the USART transmitter is busy */ |
mbed_official | 579:53297373a894 | 155 | if (module->remaining_tx_buffer_length > 0) { |
mbed_official | 579:53297373a894 | 156 | return STATUS_BUSY; |
mbed_official | 579:53297373a894 | 157 | } |
mbed_official | 579:53297373a894 | 158 | |
mbed_official | 579:53297373a894 | 159 | /* Check that the transmitter is enabled */ |
mbed_official | 579:53297373a894 | 160 | if (!(module->transmitter_enabled)) { |
mbed_official | 579:53297373a894 | 161 | return STATUS_ERR_DENIED; |
mbed_official | 579:53297373a894 | 162 | } |
mbed_official | 579:53297373a894 | 163 | |
mbed_official | 579:53297373a894 | 164 | /* Call internal write buffer function with length 1 */ |
mbed_official | 579:53297373a894 | 165 | _usart_write_buffer(module, (uint8_t *)tx_data, 1); |
mbed_official | 579:53297373a894 | 166 | |
mbed_official | 579:53297373a894 | 167 | return STATUS_OK; |
mbed_official | 579:53297373a894 | 168 | } |
mbed_official | 579:53297373a894 | 169 | |
mbed_official | 579:53297373a894 | 170 | /** |
mbed_official | 579:53297373a894 | 171 | * \brief Asynchronous read a single char |
mbed_official | 579:53297373a894 | 172 | * |
mbed_official | 579:53297373a894 | 173 | * Sets up the driver to read data from the USART module to the data |
mbed_official | 579:53297373a894 | 174 | * pointer given. If registered and enabled, a callback will be called |
mbed_official | 579:53297373a894 | 175 | * when the receiving is completed. |
mbed_official | 579:53297373a894 | 176 | * |
mbed_official | 579:53297373a894 | 177 | * \param[in] module Pointer to USART software instance struct |
mbed_official | 579:53297373a894 | 178 | * \param[out] rx_data Pointer to where received data should be put |
mbed_official | 579:53297373a894 | 179 | * |
mbed_official | 579:53297373a894 | 180 | * \returns Status of the operation. |
mbed_official | 579:53297373a894 | 181 | * \retval STATUS_OK If operation was completed |
mbed_official | 579:53297373a894 | 182 | * \retval STATUS_BUSY If operation was not completed |
mbed_official | 579:53297373a894 | 183 | */ |
mbed_official | 579:53297373a894 | 184 | enum status_code usart_read_job( |
mbed_official | 579:53297373a894 | 185 | struct usart_module *const module, |
mbed_official | 579:53297373a894 | 186 | uint16_t *const rx_data) |
mbed_official | 579:53297373a894 | 187 | { |
mbed_official | 579:53297373a894 | 188 | /* Sanity check arguments */ |
mbed_official | 579:53297373a894 | 189 | Assert(module); |
mbed_official | 579:53297373a894 | 190 | Assert(rx_data); |
mbed_official | 579:53297373a894 | 191 | |
mbed_official | 579:53297373a894 | 192 | /* Check if the USART receiver is busy */ |
mbed_official | 579:53297373a894 | 193 | if (module->remaining_rx_buffer_length > 0) { |
mbed_official | 579:53297373a894 | 194 | return STATUS_BUSY; |
mbed_official | 579:53297373a894 | 195 | } |
mbed_official | 579:53297373a894 | 196 | |
mbed_official | 579:53297373a894 | 197 | /* Call internal read buffer function with length 1 */ |
mbed_official | 579:53297373a894 | 198 | _usart_read_buffer(module, (uint8_t *)rx_data, 1); |
mbed_official | 579:53297373a894 | 199 | |
mbed_official | 579:53297373a894 | 200 | return STATUS_OK; |
mbed_official | 579:53297373a894 | 201 | } |
mbed_official | 579:53297373a894 | 202 | |
mbed_official | 579:53297373a894 | 203 | /** |
mbed_official | 579:53297373a894 | 204 | * \brief Asynchronous buffer write |
mbed_official | 579:53297373a894 | 205 | * |
mbed_official | 579:53297373a894 | 206 | * Sets up the driver to write a given buffer over the USART. If registered and |
mbed_official | 579:53297373a894 | 207 | * enabled, a callback function will be called. |
mbed_official | 579:53297373a894 | 208 | * |
mbed_official | 579:53297373a894 | 209 | * \param[in] module Pointer to USART software instance struct |
mbed_official | 579:53297373a894 | 210 | * \param[in] tx_data Pointer do data buffer to transmit |
mbed_official | 579:53297373a894 | 211 | * \param[in] length Length of the data to transmit |
mbed_official | 579:53297373a894 | 212 | * |
mbed_official | 579:53297373a894 | 213 | * \note if using 9-bit data, the array that *tx_data point to should be defined |
mbed_official | 579:53297373a894 | 214 | * as uint16_t array and should be casted to uint8_t* pointer. Because it |
mbed_official | 579:53297373a894 | 215 | * is an address pointer, the highest byte is not discarded. For example: |
mbed_official | 579:53297373a894 | 216 | * \code |
mbed_official | 579:53297373a894 | 217 | #define TX_LEN 3 |
mbed_official | 579:53297373a894 | 218 | uint16_t tx_buf[TX_LEN] = {0x0111, 0x0022, 0x0133}; |
mbed_official | 579:53297373a894 | 219 | usart_write_buffer_job(&module, (uint8_t*)tx_buf, TX_LEN); |
mbed_official | 579:53297373a894 | 220 | \endcode |
mbed_official | 579:53297373a894 | 221 | * |
mbed_official | 579:53297373a894 | 222 | * \returns Status of the operation. |
mbed_official | 579:53297373a894 | 223 | * \retval STATUS_OK If operation was completed successfully. |
mbed_official | 579:53297373a894 | 224 | * \retval STATUS_BUSY If operation was not completed, due to the |
mbed_official | 579:53297373a894 | 225 | * USART module being busy |
mbed_official | 579:53297373a894 | 226 | * \retval STATUS_ERR_INVALID_ARG If operation was not completed, due to invalid |
mbed_official | 579:53297373a894 | 227 | * arguments |
mbed_official | 579:53297373a894 | 228 | * \retval STATUS_ERR_DENIED If the transmitter is not enabled |
mbed_official | 579:53297373a894 | 229 | */ |
mbed_official | 579:53297373a894 | 230 | enum status_code usart_write_buffer_job( |
mbed_official | 579:53297373a894 | 231 | struct usart_module *const module, |
mbed_official | 579:53297373a894 | 232 | uint8_t *tx_data, |
mbed_official | 579:53297373a894 | 233 | uint16_t length) |
mbed_official | 579:53297373a894 | 234 | { |
mbed_official | 579:53297373a894 | 235 | /* Sanity check arguments */ |
mbed_official | 579:53297373a894 | 236 | Assert(module); |
mbed_official | 579:53297373a894 | 237 | Assert(tx_data); |
mbed_official | 579:53297373a894 | 238 | |
mbed_official | 579:53297373a894 | 239 | if (length == 0) { |
mbed_official | 579:53297373a894 | 240 | return STATUS_ERR_INVALID_ARG; |
mbed_official | 579:53297373a894 | 241 | } |
mbed_official | 579:53297373a894 | 242 | |
mbed_official | 579:53297373a894 | 243 | /* Check if the USART transmitter is busy */ |
mbed_official | 579:53297373a894 | 244 | if (module->remaining_tx_buffer_length > 0) { |
mbed_official | 579:53297373a894 | 245 | return STATUS_BUSY; |
mbed_official | 579:53297373a894 | 246 | } |
mbed_official | 579:53297373a894 | 247 | |
mbed_official | 579:53297373a894 | 248 | /* Check that the receiver is enabled */ |
mbed_official | 579:53297373a894 | 249 | if (!(module->transmitter_enabled)) { |
mbed_official | 579:53297373a894 | 250 | return STATUS_ERR_DENIED; |
mbed_official | 579:53297373a894 | 251 | } |
mbed_official | 579:53297373a894 | 252 | |
mbed_official | 579:53297373a894 | 253 | /* Issue internal asynchronous write */ |
mbed_official | 579:53297373a894 | 254 | _usart_write_buffer(module, tx_data, length); |
mbed_official | 579:53297373a894 | 255 | |
mbed_official | 579:53297373a894 | 256 | return STATUS_OK; |
mbed_official | 579:53297373a894 | 257 | } |
mbed_official | 579:53297373a894 | 258 | |
mbed_official | 579:53297373a894 | 259 | /** |
mbed_official | 579:53297373a894 | 260 | * \brief Asynchronous buffer read |
mbed_official | 579:53297373a894 | 261 | * |
mbed_official | 579:53297373a894 | 262 | * Sets up the driver to read from the USART to a given buffer. If registered |
mbed_official | 579:53297373a894 | 263 | * and enabled, a callback function will be called. |
mbed_official | 579:53297373a894 | 264 | * |
mbed_official | 579:53297373a894 | 265 | * \param[in] module Pointer to USART software instance struct |
mbed_official | 579:53297373a894 | 266 | * \param[out] rx_data Pointer to data buffer to receive |
mbed_official | 579:53297373a894 | 267 | * \param[in] length Data buffer length |
mbed_official | 579:53297373a894 | 268 | * |
mbed_official | 579:53297373a894 | 269 | * \note if using 9-bit data, the array that *rx_data point to should be defined |
mbed_official | 579:53297373a894 | 270 | * as uint16_t array and should be casted to uint8_t* pointer. Because it |
mbed_official | 579:53297373a894 | 271 | * is an address pointer, the highest byte is not discarded. For example: |
mbed_official | 579:53297373a894 | 272 | * \code |
mbed_official | 579:53297373a894 | 273 | #define RX_LEN 3 |
mbed_official | 579:53297373a894 | 274 | uint16_t rx_buf[RX_LEN] = {0x0,}; |
mbed_official | 579:53297373a894 | 275 | usart_read_buffer_job(&module, (uint8_t*)rx_buf, RX_LEN); |
mbed_official | 579:53297373a894 | 276 | \endcode |
mbed_official | 579:53297373a894 | 277 | * |
mbed_official | 579:53297373a894 | 278 | * \returns Status of the operation. |
mbed_official | 579:53297373a894 | 279 | * \retval STATUS_OK If operation was completed |
mbed_official | 579:53297373a894 | 280 | * \retval STATUS_BUSY If operation was not completed, due to the |
mbed_official | 579:53297373a894 | 281 | * USART module being busy |
mbed_official | 579:53297373a894 | 282 | * \retval STATUS_ERR_INVALID_ARG If operation was not completed, due to invalid |
mbed_official | 579:53297373a894 | 283 | * arguments |
mbed_official | 579:53297373a894 | 284 | * \retval STATUS_ERR_DENIED If the transmitter is not enabled |
mbed_official | 579:53297373a894 | 285 | */ |
mbed_official | 579:53297373a894 | 286 | enum status_code usart_read_buffer_job( |
mbed_official | 579:53297373a894 | 287 | struct usart_module *const module, |
mbed_official | 579:53297373a894 | 288 | uint8_t *rx_data, |
mbed_official | 579:53297373a894 | 289 | uint16_t length) |
mbed_official | 579:53297373a894 | 290 | { |
mbed_official | 579:53297373a894 | 291 | /* Sanity check arguments */ |
mbed_official | 579:53297373a894 | 292 | Assert(module); |
mbed_official | 579:53297373a894 | 293 | Assert(rx_data); |
mbed_official | 579:53297373a894 | 294 | |
mbed_official | 579:53297373a894 | 295 | if (length == 0) { |
mbed_official | 579:53297373a894 | 296 | return STATUS_ERR_INVALID_ARG; |
mbed_official | 579:53297373a894 | 297 | } |
mbed_official | 579:53297373a894 | 298 | |
mbed_official | 579:53297373a894 | 299 | /* Check that the receiver is enabled */ |
mbed_official | 579:53297373a894 | 300 | if (!(module->receiver_enabled)) { |
mbed_official | 579:53297373a894 | 301 | return STATUS_ERR_DENIED; |
mbed_official | 579:53297373a894 | 302 | } |
mbed_official | 579:53297373a894 | 303 | |
mbed_official | 579:53297373a894 | 304 | /* Check if the USART receiver is busy */ |
mbed_official | 579:53297373a894 | 305 | if (module->remaining_rx_buffer_length > 0) { |
mbed_official | 579:53297373a894 | 306 | return STATUS_BUSY; |
mbed_official | 579:53297373a894 | 307 | } |
mbed_official | 579:53297373a894 | 308 | |
mbed_official | 579:53297373a894 | 309 | /* Issue internal asynchronous read */ |
mbed_official | 579:53297373a894 | 310 | _usart_read_buffer(module, rx_data, length); |
mbed_official | 579:53297373a894 | 311 | |
mbed_official | 579:53297373a894 | 312 | return STATUS_OK; |
mbed_official | 579:53297373a894 | 313 | } |
mbed_official | 579:53297373a894 | 314 | |
mbed_official | 579:53297373a894 | 315 | /** |
mbed_official | 579:53297373a894 | 316 | * \brief Cancels ongoing read/write operation |
mbed_official | 579:53297373a894 | 317 | * |
mbed_official | 579:53297373a894 | 318 | * Cancels the ongoing read/write operation modifying parameters in the |
mbed_official | 579:53297373a894 | 319 | * USART software struct. |
mbed_official | 579:53297373a894 | 320 | * |
mbed_official | 579:53297373a894 | 321 | * \param[in] module Pointer to USART software instance struct |
mbed_official | 579:53297373a894 | 322 | * \param[in] transceiver_type Transfer type to cancel |
mbed_official | 579:53297373a894 | 323 | */ |
mbed_official | 579:53297373a894 | 324 | void usart_abort_job( |
mbed_official | 579:53297373a894 | 325 | struct usart_module *const module, |
mbed_official | 579:53297373a894 | 326 | enum usart_transceiver_type transceiver_type) |
mbed_official | 579:53297373a894 | 327 | { |
mbed_official | 579:53297373a894 | 328 | /* Sanity check arguments */ |
mbed_official | 579:53297373a894 | 329 | Assert(module); |
mbed_official | 579:53297373a894 | 330 | Assert(module->hw); |
mbed_official | 579:53297373a894 | 331 | |
mbed_official | 579:53297373a894 | 332 | /* Get a pointer to the hardware module instance */ |
mbed_official | 579:53297373a894 | 333 | SercomUsart *const usart_hw = &(module->hw->USART); |
mbed_official | 579:53297373a894 | 334 | |
mbed_official | 579:53297373a894 | 335 | switch(transceiver_type) { |
mbed_official | 579:53297373a894 | 336 | case USART_TRANSCEIVER_RX: |
mbed_official | 579:53297373a894 | 337 | /* Clear the interrupt flag in order to prevent the receive |
mbed_official | 579:53297373a894 | 338 | * complete callback to fire */ |
mbed_official | 579:53297373a894 | 339 | usart_hw->INTFLAG.reg = SERCOM_USART_INTFLAG_RXC; |
mbed_official | 579:53297373a894 | 340 | |
mbed_official | 579:53297373a894 | 341 | /* Clear the software reception buffer */ |
mbed_official | 579:53297373a894 | 342 | module->remaining_rx_buffer_length = 0; |
mbed_official | 579:53297373a894 | 343 | |
mbed_official | 579:53297373a894 | 344 | break; |
mbed_official | 579:53297373a894 | 345 | |
mbed_official | 579:53297373a894 | 346 | case USART_TRANSCEIVER_TX: |
mbed_official | 579:53297373a894 | 347 | /* Clear the interrupt flag in order to prevent the receive |
mbed_official | 579:53297373a894 | 348 | * complete callback to fire */ |
mbed_official | 579:53297373a894 | 349 | usart_hw->INTFLAG.reg = SERCOM_USART_INTFLAG_TXC; |
mbed_official | 579:53297373a894 | 350 | |
mbed_official | 579:53297373a894 | 351 | /* Clear the software reception buffer */ |
mbed_official | 579:53297373a894 | 352 | module->remaining_tx_buffer_length = 0; |
mbed_official | 579:53297373a894 | 353 | |
mbed_official | 579:53297373a894 | 354 | break; |
mbed_official | 579:53297373a894 | 355 | } |
mbed_official | 579:53297373a894 | 356 | } |
mbed_official | 579:53297373a894 | 357 | |
mbed_official | 579:53297373a894 | 358 | /** |
mbed_official | 579:53297373a894 | 359 | * \brief Get status from the ongoing or last asynchronous transfer operation |
mbed_official | 579:53297373a894 | 360 | * |
mbed_official | 579:53297373a894 | 361 | * Returns the error from a given ongoing or last asynchronous transfer operation. |
mbed_official | 579:53297373a894 | 362 | * Either from a read or write transfer. |
mbed_official | 579:53297373a894 | 363 | * |
mbed_official | 579:53297373a894 | 364 | * \param[in] module Pointer to USART software instance struct |
mbed_official | 579:53297373a894 | 365 | * \param[in] transceiver_type Transfer type to check |
mbed_official | 579:53297373a894 | 366 | * |
mbed_official | 579:53297373a894 | 367 | * \return Status of the given job. |
mbed_official | 579:53297373a894 | 368 | * \retval STATUS_OK No error occurred during the last transfer |
mbed_official | 579:53297373a894 | 369 | * \retval STATUS_BUSY A transfer is ongoing |
mbed_official | 579:53297373a894 | 370 | * \retval STATUS_ERR_BAD_DATA The last operation was aborted due to a |
mbed_official | 579:53297373a894 | 371 | * parity error. The transfer could be affected |
mbed_official | 579:53297373a894 | 372 | * by external noise |
mbed_official | 579:53297373a894 | 373 | * \retval STATUS_ERR_BAD_FORMAT The last operation was aborted due to a |
mbed_official | 579:53297373a894 | 374 | * frame error |
mbed_official | 579:53297373a894 | 375 | * \retval STATUS_ERR_OVERFLOW The last operation was aborted due to a |
mbed_official | 579:53297373a894 | 376 | * buffer overflow |
mbed_official | 579:53297373a894 | 377 | * \retval STATUS_ERR_INVALID_ARG An invalid transceiver enum given |
mbed_official | 579:53297373a894 | 378 | */ |
mbed_official | 579:53297373a894 | 379 | enum status_code usart_get_job_status( |
mbed_official | 579:53297373a894 | 380 | struct usart_module *const module, |
mbed_official | 579:53297373a894 | 381 | enum usart_transceiver_type transceiver_type) |
mbed_official | 579:53297373a894 | 382 | { |
mbed_official | 579:53297373a894 | 383 | /* Sanity check arguments */ |
mbed_official | 579:53297373a894 | 384 | Assert(module); |
mbed_official | 579:53297373a894 | 385 | |
mbed_official | 579:53297373a894 | 386 | /* Variable for status code */ |
mbed_official | 579:53297373a894 | 387 | enum status_code status_code; |
mbed_official | 579:53297373a894 | 388 | |
mbed_official | 579:53297373a894 | 389 | switch(transceiver_type) { |
mbed_official | 579:53297373a894 | 390 | case USART_TRANSCEIVER_RX: |
mbed_official | 579:53297373a894 | 391 | status_code = module->rx_status; |
mbed_official | 579:53297373a894 | 392 | break; |
mbed_official | 579:53297373a894 | 393 | |
mbed_official | 579:53297373a894 | 394 | case USART_TRANSCEIVER_TX: |
mbed_official | 579:53297373a894 | 395 | status_code = module->tx_status; |
mbed_official | 579:53297373a894 | 396 | break; |
mbed_official | 579:53297373a894 | 397 | |
mbed_official | 579:53297373a894 | 398 | default: |
mbed_official | 579:53297373a894 | 399 | status_code = STATUS_ERR_INVALID_ARG; |
mbed_official | 579:53297373a894 | 400 | break; |
mbed_official | 579:53297373a894 | 401 | } |
mbed_official | 579:53297373a894 | 402 | |
mbed_official | 579:53297373a894 | 403 | return status_code; |
mbed_official | 579:53297373a894 | 404 | } |
mbed_official | 579:53297373a894 | 405 | |
mbed_official | 579:53297373a894 | 406 | /** |
mbed_official | 579:53297373a894 | 407 | * \internal |
mbed_official | 579:53297373a894 | 408 | * Handles interrupts as they occur, and it will run callback functions |
mbed_official | 579:53297373a894 | 409 | * which are registered and enabled. |
mbed_official | 579:53297373a894 | 410 | * |
mbed_official | 579:53297373a894 | 411 | * \param[in] instance ID of the SERCOM instance calling the interrupt |
mbed_official | 579:53297373a894 | 412 | * handler. |
mbed_official | 579:53297373a894 | 413 | */ |
mbed_official | 579:53297373a894 | 414 | void _usart_interrupt_handler( |
mbed_official | 579:53297373a894 | 415 | uint8_t instance) |
mbed_official | 579:53297373a894 | 416 | { |
mbed_official | 579:53297373a894 | 417 | /* Temporary variables */ |
mbed_official | 579:53297373a894 | 418 | uint16_t interrupt_status; |
mbed_official | 579:53297373a894 | 419 | uint16_t callback_status; |
mbed_official | 579:53297373a894 | 420 | uint8_t error_code; |
mbed_official | 579:53297373a894 | 421 | |
mbed_official | 579:53297373a894 | 422 | |
mbed_official | 579:53297373a894 | 423 | /* Get device instance from the look-up table */ |
mbed_official | 579:53297373a894 | 424 | struct usart_module *module |
mbed_official | 579:53297373a894 | 425 | = (struct usart_module *)_sercom_instances[instance]; |
mbed_official | 579:53297373a894 | 426 | |
mbed_official | 579:53297373a894 | 427 | /* Pointer to the hardware module instance */ |
mbed_official | 579:53297373a894 | 428 | SercomUsart *const usart_hw |
mbed_official | 579:53297373a894 | 429 | = &(module->hw->USART); |
mbed_official | 579:53297373a894 | 430 | |
mbed_official | 579:53297373a894 | 431 | /* Wait for the synchronization to complete */ |
mbed_official | 579:53297373a894 | 432 | _usart_wait_for_sync(module); |
mbed_official | 579:53297373a894 | 433 | |
mbed_official | 579:53297373a894 | 434 | /* Read and mask interrupt flag register */ |
mbed_official | 579:53297373a894 | 435 | interrupt_status = usart_hw->INTFLAG.reg; |
mbed_official | 579:53297373a894 | 436 | interrupt_status &= usart_hw->INTENSET.reg; |
mbed_official | 579:53297373a894 | 437 | callback_status = module->callback_reg_mask & |
mbed_official | 579:53297373a894 | 438 | module->callback_enable_mask; |
mbed_official | 579:53297373a894 | 439 | |
mbed_official | 579:53297373a894 | 440 | /* Check if a DATA READY interrupt has occurred, |
mbed_official | 579:53297373a894 | 441 | * and if there is more to transfer */ |
mbed_official | 579:53297373a894 | 442 | if (interrupt_status & SERCOM_USART_INTFLAG_DRE) { |
mbed_official | 579:53297373a894 | 443 | if (module->remaining_tx_buffer_length) { |
mbed_official | 579:53297373a894 | 444 | /* Write value will be at least 8-bits long */ |
mbed_official | 579:53297373a894 | 445 | uint16_t data_to_send = *(module->tx_buffer_ptr); |
mbed_official | 579:53297373a894 | 446 | /* Increment 8-bit pointer */ |
mbed_official | 579:53297373a894 | 447 | (module->tx_buffer_ptr)++; |
mbed_official | 579:53297373a894 | 448 | |
mbed_official | 579:53297373a894 | 449 | if (module->character_size == USART_CHARACTER_SIZE_9BIT) { |
mbed_official | 579:53297373a894 | 450 | data_to_send |= (*(module->tx_buffer_ptr) << 8); |
mbed_official | 579:53297373a894 | 451 | /* Increment 8-bit pointer */ |
mbed_official | 579:53297373a894 | 452 | (module->tx_buffer_ptr)++; |
mbed_official | 579:53297373a894 | 453 | } |
mbed_official | 579:53297373a894 | 454 | /* Write the data to send */ |
mbed_official | 579:53297373a894 | 455 | usart_hw->DATA.reg = (data_to_send & SERCOM_USART_DATA_MASK); |
mbed_official | 579:53297373a894 | 456 | |
mbed_official | 579:53297373a894 | 457 | if (--(module->remaining_tx_buffer_length) == 0) { |
mbed_official | 579:53297373a894 | 458 | /* Disable the Data Register Empty Interrupt */ |
mbed_official | 579:53297373a894 | 459 | usart_hw->INTENCLR.reg = SERCOM_USART_INTFLAG_DRE; |
mbed_official | 579:53297373a894 | 460 | /* Enable Transmission Complete interrupt */ |
mbed_official | 579:53297373a894 | 461 | usart_hw->INTENSET.reg = SERCOM_USART_INTFLAG_TXC; |
mbed_official | 579:53297373a894 | 462 | |
mbed_official | 579:53297373a894 | 463 | } |
mbed_official | 579:53297373a894 | 464 | } else { |
mbed_official | 579:53297373a894 | 465 | usart_hw->INTENCLR.reg = SERCOM_USART_INTFLAG_DRE; |
mbed_official | 579:53297373a894 | 466 | } |
mbed_official | 579:53297373a894 | 467 | |
mbed_official | 579:53297373a894 | 468 | /* Check if the Transmission Complete interrupt has occurred and |
mbed_official | 579:53297373a894 | 469 | * that the transmit buffer is empty */ |
mbed_official | 579:53297373a894 | 470 | } |
mbed_official | 579:53297373a894 | 471 | |
mbed_official | 579:53297373a894 | 472 | if (interrupt_status & SERCOM_USART_INTFLAG_TXC) { |
mbed_official | 579:53297373a894 | 473 | |
mbed_official | 579:53297373a894 | 474 | /* Disable TX Complete Interrupt, and set STATUS_OK */ |
mbed_official | 579:53297373a894 | 475 | usart_hw->INTENCLR.reg = SERCOM_USART_INTFLAG_TXC; |
mbed_official | 579:53297373a894 | 476 | module->tx_status = STATUS_OK; |
mbed_official | 579:53297373a894 | 477 | |
mbed_official | 579:53297373a894 | 478 | /* Run callback if registered and enabled */ |
mbed_official | 579:53297373a894 | 479 | if (callback_status & (1 << USART_CALLBACK_BUFFER_TRANSMITTED)) { |
mbed_official | 579:53297373a894 | 480 | (*(module->callback[USART_CALLBACK_BUFFER_TRANSMITTED]))(module); |
mbed_official | 579:53297373a894 | 481 | } |
mbed_official | 579:53297373a894 | 482 | |
mbed_official | 579:53297373a894 | 483 | /* Check if the Receive Complete interrupt has occurred, and that |
mbed_official | 579:53297373a894 | 484 | * there's more data to receive */ |
mbed_official | 579:53297373a894 | 485 | } |
mbed_official | 579:53297373a894 | 486 | |
mbed_official | 579:53297373a894 | 487 | if (interrupt_status & SERCOM_USART_INTFLAG_RXC) { |
mbed_official | 579:53297373a894 | 488 | |
mbed_official | 579:53297373a894 | 489 | if (module->remaining_rx_buffer_length) { |
mbed_official | 579:53297373a894 | 490 | /* Read out the status code and mask away all but the 4 LSBs*/ |
mbed_official | 579:53297373a894 | 491 | error_code = (uint8_t)(usart_hw->STATUS.reg & SERCOM_USART_STATUS_MASK); |
mbed_official | 579:53297373a894 | 492 | #if !SAMD20 |
mbed_official | 579:53297373a894 | 493 | /* CTS status should not be considered as an error */ |
mbed_official | 579:53297373a894 | 494 | if(error_code & SERCOM_USART_STATUS_CTS) { |
mbed_official | 579:53297373a894 | 495 | error_code &= ~SERCOM_USART_STATUS_CTS; |
mbed_official | 579:53297373a894 | 496 | } |
mbed_official | 579:53297373a894 | 497 | #endif |
mbed_official | 579:53297373a894 | 498 | /* Check if an error has occurred during the receiving */ |
mbed_official | 579:53297373a894 | 499 | if (error_code) { |
mbed_official | 579:53297373a894 | 500 | /* Check which error occurred */ |
mbed_official | 579:53297373a894 | 501 | if (error_code & SERCOM_USART_STATUS_FERR) { |
mbed_official | 579:53297373a894 | 502 | /* Store the error code and clear flag by writing 1 to it */ |
mbed_official | 579:53297373a894 | 503 | module->rx_status = STATUS_ERR_BAD_FORMAT; |
mbed_official | 579:53297373a894 | 504 | usart_hw->STATUS.reg |= SERCOM_USART_STATUS_FERR; |
mbed_official | 579:53297373a894 | 505 | } else if (error_code & SERCOM_USART_STATUS_BUFOVF) { |
mbed_official | 579:53297373a894 | 506 | /* Store the error code and clear flag by writing 1 to it */ |
mbed_official | 579:53297373a894 | 507 | module->rx_status = STATUS_ERR_OVERFLOW; |
mbed_official | 579:53297373a894 | 508 | usart_hw->STATUS.reg |= SERCOM_USART_STATUS_BUFOVF; |
mbed_official | 579:53297373a894 | 509 | } else if (error_code & SERCOM_USART_STATUS_PERR) { |
mbed_official | 579:53297373a894 | 510 | /* Store the error code and clear flag by writing 1 to it */ |
mbed_official | 579:53297373a894 | 511 | module->rx_status = STATUS_ERR_BAD_DATA; |
mbed_official | 579:53297373a894 | 512 | usart_hw->STATUS.reg |= SERCOM_USART_STATUS_PERR; |
mbed_official | 579:53297373a894 | 513 | } |
mbed_official | 579:53297373a894 | 514 | #ifdef FEATURE_USART_LIN_SLAVE |
mbed_official | 579:53297373a894 | 515 | else if (error_code & SERCOM_USART_STATUS_ISF) { |
mbed_official | 579:53297373a894 | 516 | /* Store the error code and clear flag by writing 1 to it */ |
mbed_official | 579:53297373a894 | 517 | module->rx_status = STATUS_ERR_PROTOCOL; |
mbed_official | 579:53297373a894 | 518 | usart_hw->STATUS.reg |= SERCOM_USART_STATUS_ISF; |
mbed_official | 579:53297373a894 | 519 | } |
mbed_official | 579:53297373a894 | 520 | #endif |
mbed_official | 579:53297373a894 | 521 | #ifdef FEATURE_USART_COLLISION_DECTION |
mbed_official | 579:53297373a894 | 522 | else if (error_code & SERCOM_USART_STATUS_COLL) { |
mbed_official | 579:53297373a894 | 523 | /* Store the error code and clear flag by writing 1 to it */ |
mbed_official | 579:53297373a894 | 524 | module->rx_status = STATUS_ERR_PACKET_COLLISION; |
mbed_official | 579:53297373a894 | 525 | usart_hw->STATUS.reg |= SERCOM_USART_STATUS_COLL; |
mbed_official | 579:53297373a894 | 526 | } |
mbed_official | 579:53297373a894 | 527 | #endif |
mbed_official | 579:53297373a894 | 528 | |
mbed_official | 579:53297373a894 | 529 | /* Run callback if registered and enabled */ |
mbed_official | 579:53297373a894 | 530 | if (callback_status |
mbed_official | 579:53297373a894 | 531 | & (1 << USART_CALLBACK_ERROR)) { |
mbed_official | 579:53297373a894 | 532 | (*(module->callback[USART_CALLBACK_ERROR]))(module); |
mbed_official | 579:53297373a894 | 533 | } |
mbed_official | 579:53297373a894 | 534 | |
mbed_official | 579:53297373a894 | 535 | } else { |
mbed_official | 579:53297373a894 | 536 | |
mbed_official | 579:53297373a894 | 537 | /* Read current packet from DATA register, |
mbed_official | 579:53297373a894 | 538 | * increment buffer pointer and decrement buffer length */ |
mbed_official | 579:53297373a894 | 539 | uint16_t received_data = (usart_hw->DATA.reg & SERCOM_USART_DATA_MASK); |
mbed_official | 579:53297373a894 | 540 | |
mbed_official | 579:53297373a894 | 541 | /* Read value will be at least 8-bits long */ |
mbed_official | 579:53297373a894 | 542 | *(module->rx_buffer_ptr) = received_data; |
mbed_official | 579:53297373a894 | 543 | /* Increment 8-bit pointer */ |
mbed_official | 579:53297373a894 | 544 | module->rx_buffer_ptr += 1; |
mbed_official | 579:53297373a894 | 545 | |
mbed_official | 579:53297373a894 | 546 | if (module->character_size == USART_CHARACTER_SIZE_9BIT) { |
mbed_official | 579:53297373a894 | 547 | /* 9-bit data, write next received byte to the buffer */ |
mbed_official | 579:53297373a894 | 548 | *(module->rx_buffer_ptr) = (received_data >> 8); |
mbed_official | 579:53297373a894 | 549 | /* Increment 8-bit pointer */ |
mbed_official | 579:53297373a894 | 550 | module->rx_buffer_ptr += 1; |
mbed_official | 579:53297373a894 | 551 | } |
mbed_official | 579:53297373a894 | 552 | |
mbed_official | 579:53297373a894 | 553 | /* Check if the last character have been received */ |
mbed_official | 579:53297373a894 | 554 | if(--(module->remaining_rx_buffer_length) == 0) { |
mbed_official | 579:53297373a894 | 555 | /* Disable RX Complete Interrupt, |
mbed_official | 579:53297373a894 | 556 | * and set STATUS_OK */ |
mbed_official | 579:53297373a894 | 557 | usart_hw->INTENCLR.reg = SERCOM_USART_INTFLAG_RXC; |
mbed_official | 579:53297373a894 | 558 | module->rx_status = STATUS_OK; |
mbed_official | 579:53297373a894 | 559 | |
mbed_official | 579:53297373a894 | 560 | /* Run callback if registered and enabled */ |
mbed_official | 579:53297373a894 | 561 | if (callback_status |
mbed_official | 579:53297373a894 | 562 | & (1 << USART_CALLBACK_BUFFER_RECEIVED)) { |
mbed_official | 579:53297373a894 | 563 | (*(module->callback[USART_CALLBACK_BUFFER_RECEIVED]))(module); |
mbed_official | 579:53297373a894 | 564 | } |
mbed_official | 579:53297373a894 | 565 | } |
mbed_official | 579:53297373a894 | 566 | } |
mbed_official | 579:53297373a894 | 567 | } else { |
mbed_official | 579:53297373a894 | 568 | /* This should not happen. Disable Receive Complete interrupt. */ |
mbed_official | 579:53297373a894 | 569 | usart_hw->INTENCLR.reg = SERCOM_USART_INTFLAG_RXC; |
mbed_official | 579:53297373a894 | 570 | } |
mbed_official | 579:53297373a894 | 571 | } |
mbed_official | 579:53297373a894 | 572 | |
mbed_official | 579:53297373a894 | 573 | #ifdef FEATURE_USART_HARDWARE_FLOW_CONTROL |
mbed_official | 579:53297373a894 | 574 | if (interrupt_status & SERCOM_USART_INTFLAG_CTSIC) { |
mbed_official | 579:53297373a894 | 575 | /* Disable interrupts */ |
mbed_official | 579:53297373a894 | 576 | usart_hw->INTENCLR.reg = SERCOM_USART_INTENCLR_CTSIC; |
mbed_official | 579:53297373a894 | 577 | /* Clear interrupt flag */ |
mbed_official | 579:53297373a894 | 578 | usart_hw->INTFLAG.reg = SERCOM_USART_INTFLAG_CTSIC; |
mbed_official | 579:53297373a894 | 579 | |
mbed_official | 579:53297373a894 | 580 | /* Run callback if registered and enabled */ |
mbed_official | 579:53297373a894 | 581 | if (callback_status & (1 << USART_CALLBACK_CTS_INPUT_CHANGE)) { |
mbed_official | 579:53297373a894 | 582 | (*(module->callback[USART_CALLBACK_CTS_INPUT_CHANGE]))(module); |
mbed_official | 579:53297373a894 | 583 | } |
mbed_official | 579:53297373a894 | 584 | } |
mbed_official | 579:53297373a894 | 585 | #endif |
mbed_official | 579:53297373a894 | 586 | |
mbed_official | 579:53297373a894 | 587 | #ifdef FEATURE_USART_LIN_SLAVE |
mbed_official | 579:53297373a894 | 588 | if (interrupt_status & SERCOM_USART_INTFLAG_RXBRK) { |
mbed_official | 579:53297373a894 | 589 | /* Disable interrupts */ |
mbed_official | 579:53297373a894 | 590 | usart_hw->INTENCLR.reg = SERCOM_USART_INTENCLR_RXBRK; |
mbed_official | 579:53297373a894 | 591 | /* Clear interrupt flag */ |
mbed_official | 579:53297373a894 | 592 | usart_hw->INTFLAG.reg = SERCOM_USART_INTFLAG_RXBRK; |
mbed_official | 579:53297373a894 | 593 | |
mbed_official | 579:53297373a894 | 594 | /* Run callback if registered and enabled */ |
mbed_official | 579:53297373a894 | 595 | if (callback_status & (1 << USART_CALLBACK_BREAK_RECEIVED)) { |
mbed_official | 579:53297373a894 | 596 | (*(module->callback[USART_CALLBACK_BREAK_RECEIVED]))(module); |
mbed_official | 579:53297373a894 | 597 | } |
mbed_official | 579:53297373a894 | 598 | } |
mbed_official | 579:53297373a894 | 599 | #endif |
mbed_official | 579:53297373a894 | 600 | |
mbed_official | 579:53297373a894 | 601 | #ifdef FEATURE_USART_START_FRAME_DECTION |
mbed_official | 579:53297373a894 | 602 | if (interrupt_status & SERCOM_USART_INTFLAG_RXS) { |
mbed_official | 579:53297373a894 | 603 | /* Disable interrupts */ |
mbed_official | 579:53297373a894 | 604 | usart_hw->INTENCLR.reg = SERCOM_USART_INTENCLR_RXS; |
mbed_official | 579:53297373a894 | 605 | /* Clear interrupt flag */ |
mbed_official | 579:53297373a894 | 606 | usart_hw->INTFLAG.reg = SERCOM_USART_INTFLAG_RXS; |
mbed_official | 579:53297373a894 | 607 | |
mbed_official | 579:53297373a894 | 608 | /* Run callback if registered and enabled */ |
mbed_official | 579:53297373a894 | 609 | if (callback_status & (1 << USART_CALLBACK_START_RECEIVED)) { |
mbed_official | 579:53297373a894 | 610 | (*(module->callback[USART_CALLBACK_START_RECEIVED]))(module); |
mbed_official | 579:53297373a894 | 611 | } |
mbed_official | 579:53297373a894 | 612 | } |
mbed_official | 579:53297373a894 | 613 | #endif |
mbed_official | 579:53297373a894 | 614 | } |