Toyomasa Watarai / easy-connect-type-yd

Easily add all supported connectivity methods to your mbed OS project

Dependencies:   type-yd-driver

stm-spirit1-rf-driver/source/libs/spirit1/SPIRIT1_Library/Src/SPIRIT_Timer.c@0:615f90842ce8, 2017-07-12 (annotated)

Committer:
MACRUM
Date:
Wed Jul 12 10:52:58 2017 +0000
Revision:
0:615f90842ce8
Initial commit

Who changed what in which revision?

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MACRUM 0:615f90842ce8 1 /**
MACRUM 0:615f90842ce8 2 ******************************************************************************
MACRUM 0:615f90842ce8 3 * @file SPIRIT_Timer.c
MACRUM 0:615f90842ce8 4 * @author VMA division - AMS
MACRUM 0:615f90842ce8 5 * @version 3.2.2
MACRUM 0:615f90842ce8 6 * @date 08-July-2015
MACRUM 0:615f90842ce8 7 * @brief Configuration and management of SPIRIT timers.
MACRUM 0:615f90842ce8 8 * @details
MACRUM 0:615f90842ce8 9 *
MACRUM 0:615f90842ce8 10 * @attention
MACRUM 0:615f90842ce8 11 *
MACRUM 0:615f90842ce8 12 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
MACRUM 0:615f90842ce8 13 *
MACRUM 0:615f90842ce8 14 * Redistribution and use in source and binary forms, with or without modification,
MACRUM 0:615f90842ce8 15 * are permitted provided that the following conditions are met:
MACRUM 0:615f90842ce8 16 * 1. Redistributions of source code must retain the above copyright notice,
MACRUM 0:615f90842ce8 17 * this list of conditions and the following disclaimer.
MACRUM 0:615f90842ce8 18 * 2. Redistributions in binary form must reproduce the above copyright notice,
MACRUM 0:615f90842ce8 19 * this list of conditions and the following disclaimer in the documentation
MACRUM 0:615f90842ce8 20 * and/or other materials provided with the distribution.
MACRUM 0:615f90842ce8 21 * 3. Neither the name of STMicroelectronics nor the names of its contributors
MACRUM 0:615f90842ce8 22 * may be used to endorse or promote products derived from this software
MACRUM 0:615f90842ce8 23 * without specific prior written permission.
MACRUM 0:615f90842ce8 24 *
MACRUM 0:615f90842ce8 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
MACRUM 0:615f90842ce8 26 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
MACRUM 0:615f90842ce8 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
MACRUM 0:615f90842ce8 28 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
MACRUM 0:615f90842ce8 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
MACRUM 0:615f90842ce8 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
MACRUM 0:615f90842ce8 31 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
MACRUM 0:615f90842ce8 32 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
MACRUM 0:615f90842ce8 33 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
MACRUM 0:615f90842ce8 34 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
MACRUM 0:615f90842ce8 35 *
MACRUM 0:615f90842ce8 36 ******************************************************************************
MACRUM 0:615f90842ce8 37 */
MACRUM 0:615f90842ce8 38
MACRUM 0:615f90842ce8 39 /* Includes ------------------------------------------------------------------*/
MACRUM 0:615f90842ce8 40 #include "SPIRIT_Timer.h"
MACRUM 0:615f90842ce8 41 #include "SPIRIT_Radio.h"
MACRUM 0:615f90842ce8 42 #include "MCU_Interface.h"
MACRUM 0:615f90842ce8 43
MACRUM 0:615f90842ce8 44
MACRUM 0:615f90842ce8 45
MACRUM 0:615f90842ce8 46
MACRUM 0:615f90842ce8 47 /**
MACRUM 0:615f90842ce8 48 * @addtogroup SPIRIT_Libraries
MACRUM 0:615f90842ce8 49 * @{
MACRUM 0:615f90842ce8 50 */
MACRUM 0:615f90842ce8 51
MACRUM 0:615f90842ce8 52
MACRUM 0:615f90842ce8 53 /**
MACRUM 0:615f90842ce8 54 * @addtogroup SPIRIT_Timer
MACRUM 0:615f90842ce8 55 * @{
MACRUM 0:615f90842ce8 56 */
MACRUM 0:615f90842ce8 57
MACRUM 0:615f90842ce8 58
MACRUM 0:615f90842ce8 59 /**
MACRUM 0:615f90842ce8 60 * @defgroup Timer_Private_TypesDefinitions Timer Private Types Definitions
MACRUM 0:615f90842ce8 61 * @{
MACRUM 0:615f90842ce8 62 */
MACRUM 0:615f90842ce8 63
MACRUM 0:615f90842ce8 64 /**
MACRUM 0:615f90842ce8 65 *@}
MACRUM 0:615f90842ce8 66 */
MACRUM 0:615f90842ce8 67
MACRUM 0:615f90842ce8 68
MACRUM 0:615f90842ce8 69 /**
MACRUM 0:615f90842ce8 70 * @defgroup Timer_Private_Defines Timer Private Defines
MACRUM 0:615f90842ce8 71 * @{
MACRUM 0:615f90842ce8 72 */
MACRUM 0:615f90842ce8 73
MACRUM 0:615f90842ce8 74 /**
MACRUM 0:615f90842ce8 75 *@}
MACRUM 0:615f90842ce8 76 */
MACRUM 0:615f90842ce8 77
MACRUM 0:615f90842ce8 78
MACRUM 0:615f90842ce8 79 /**
MACRUM 0:615f90842ce8 80 * @defgroup Timer_Private_Macros Timer Private Macros
MACRUM 0:615f90842ce8 81 * @{
MACRUM 0:615f90842ce8 82 */
MACRUM 0:615f90842ce8 83
MACRUM 0:615f90842ce8 84
MACRUM 0:615f90842ce8 85 /**
MACRUM 0:615f90842ce8 86 *@}
MACRUM 0:615f90842ce8 87 */
MACRUM 0:615f90842ce8 88
MACRUM 0:615f90842ce8 89
MACRUM 0:615f90842ce8 90 /**
MACRUM 0:615f90842ce8 91 * @defgroup Timer_Private_Variables Timer Private Variables
MACRUM 0:615f90842ce8 92 * @{
MACRUM 0:615f90842ce8 93 */
MACRUM 0:615f90842ce8 94
MACRUM 0:615f90842ce8 95 /**
MACRUM 0:615f90842ce8 96 *@}
MACRUM 0:615f90842ce8 97 */
MACRUM 0:615f90842ce8 98
MACRUM 0:615f90842ce8 99
MACRUM 0:615f90842ce8 100 /**
MACRUM 0:615f90842ce8 101 * @defgroup Timer_Private_FunctionPrototypes Timer Private Function Prototypes
MACRUM 0:615f90842ce8 102 * @{
MACRUM 0:615f90842ce8 103 */
MACRUM 0:615f90842ce8 104
MACRUM 0:615f90842ce8 105 /**
MACRUM 0:615f90842ce8 106 *@}
MACRUM 0:615f90842ce8 107 */
MACRUM 0:615f90842ce8 108
MACRUM 0:615f90842ce8 109
MACRUM 0:615f90842ce8 110 /**
MACRUM 0:615f90842ce8 111 * @defgroup Timer_Private_Functions Timer Private Functions
MACRUM 0:615f90842ce8 112 * @{
MACRUM 0:615f90842ce8 113 */
MACRUM 0:615f90842ce8 114
MACRUM 0:615f90842ce8 115 /**
MACRUM 0:615f90842ce8 116 * @brief Enables or Disables the LDCR mode.
MACRUM 0:615f90842ce8 117 * @param xNewState new state for LDCR mode.
MACRUM 0:615f90842ce8 118 * This parameter can be: S_ENABLE or S_DISABLE.
MACRUM 0:615f90842ce8 119 * @retval None.
MACRUM 0:615f90842ce8 120 */
MACRUM 0:615f90842ce8 121 void SpiritTimerLdcrMode(SpiritFunctionalState xNewState)
MACRUM 0:615f90842ce8 122 {
MACRUM 0:615f90842ce8 123 uint8_t tempRegValue;
MACRUM 0:615f90842ce8 124
MACRUM 0:615f90842ce8 125 /* Reads the register value */
MACRUM 0:615f90842ce8 126 g_xStatus = SpiritSpiReadRegisters(PROTOCOL2_BASE, 1, &tempRegValue);
MACRUM 0:615f90842ce8 127
MACRUM 0:615f90842ce8 128 /* Mask the read value to enable or disable the LDC mode */
MACRUM 0:615f90842ce8 129 if(xNewState==S_ENABLE)
MACRUM 0:615f90842ce8 130 {
MACRUM 0:615f90842ce8 131 tempRegValue |= PROTOCOL2_LDC_MODE_MASK;
MACRUM 0:615f90842ce8 132 }
MACRUM 0:615f90842ce8 133 else
MACRUM 0:615f90842ce8 134 {
MACRUM 0:615f90842ce8 135 tempRegValue &= ~PROTOCOL2_LDC_MODE_MASK;
MACRUM 0:615f90842ce8 136 }
MACRUM 0:615f90842ce8 137
MACRUM 0:615f90842ce8 138 /* Writes the register to Enable or Disable the LDCR mode */
MACRUM 0:615f90842ce8 139 g_xStatus = SpiritSpiWriteRegisters(PROTOCOL2_BASE, 1, &tempRegValue);
MACRUM 0:615f90842ce8 140
MACRUM 0:615f90842ce8 141 }
MACRUM 0:615f90842ce8 142
MACRUM 0:615f90842ce8 143
MACRUM 0:615f90842ce8 144 /**
MACRUM 0:615f90842ce8 145 * @brief Enables or Disables the LDCR timer reloading with the value stored in the LDCR_RELOAD registers.
MACRUM 0:615f90842ce8 146 * @param xNewState new state for LDCR reloading.
MACRUM 0:615f90842ce8 147 * This parameter can be: S_ENABLE or S_DISABLE.
MACRUM 0:615f90842ce8 148 * @retval None.
MACRUM 0:615f90842ce8 149 */
MACRUM 0:615f90842ce8 150 void SpiritTimerLdcrAutoReload(SpiritFunctionalState xNewState)
MACRUM 0:615f90842ce8 151 {
MACRUM 0:615f90842ce8 152 uint8_t tempRegValue;
MACRUM 0:615f90842ce8 153
MACRUM 0:615f90842ce8 154 /* Reads the register value */
MACRUM 0:615f90842ce8 155 g_xStatus = SpiritSpiReadRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
MACRUM 0:615f90842ce8 156
MACRUM 0:615f90842ce8 157 /* Mask te read value to enable or disable the reload on sync mode */
MACRUM 0:615f90842ce8 158 if(xNewState==S_ENABLE)
MACRUM 0:615f90842ce8 159 {
MACRUM 0:615f90842ce8 160 tempRegValue |= PROTOCOL1_LDC_RELOAD_ON_SYNC_MASK;
MACRUM 0:615f90842ce8 161 }
MACRUM 0:615f90842ce8 162 else
MACRUM 0:615f90842ce8 163 {
MACRUM 0:615f90842ce8 164 tempRegValue &= ~PROTOCOL1_LDC_RELOAD_ON_SYNC_MASK;
MACRUM 0:615f90842ce8 165 }
MACRUM 0:615f90842ce8 166
MACRUM 0:615f90842ce8 167 /* Writes the register to Enable or Disable the Auto Reload */
MACRUM 0:615f90842ce8 168 g_xStatus = SpiritSpiWriteRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
MACRUM 0:615f90842ce8 169
MACRUM 0:615f90842ce8 170 }
MACRUM 0:615f90842ce8 171
MACRUM 0:615f90842ce8 172
MACRUM 0:615f90842ce8 173 /**
MACRUM 0:615f90842ce8 174 * @brief Returns the LDCR timer reload bit.
MACRUM 0:615f90842ce8 175 * @param None.
MACRUM 0:615f90842ce8 176 * @retval SpiritFunctionalState: value of the reload bit.
MACRUM 0:615f90842ce8 177 */
MACRUM 0:615f90842ce8 178 SpiritFunctionalState SpiritTimerLdcrGetAutoReload(void)
MACRUM 0:615f90842ce8 179 {
MACRUM 0:615f90842ce8 180 uint8_t tempRegValue;
MACRUM 0:615f90842ce8 181
MACRUM 0:615f90842ce8 182 /* Reads the register value */
MACRUM 0:615f90842ce8 183 g_xStatus = SpiritSpiReadRegisters(PROTOCOL1_BASE, 1, &tempRegValue);
MACRUM 0:615f90842ce8 184
MACRUM 0:615f90842ce8 185 return (SpiritFunctionalState)(tempRegValue & 0x80);
MACRUM 0:615f90842ce8 186
MACRUM 0:615f90842ce8 187 }
MACRUM 0:615f90842ce8 188
MACRUM 0:615f90842ce8 189 /**
MACRUM 0:615f90842ce8 190 * @brief Sets the RX timeout timer initialization registers with the values of COUNTER and PRESCALER according to the formula: Trx=PRESCALER*COUNTER*Tck.
MACRUM 0:615f90842ce8 191 * Remember that it is possible to have infinite RX_Timeout writing 0 in the RX_Timeout_Counter and/or RX_Timeout_Prescaler registers.
MACRUM 0:615f90842ce8 192 * @param cCounter value for the timer counter.
MACRUM 0:615f90842ce8 193 * This parameter must be an uint8_t.
MACRUM 0:615f90842ce8 194 * @param cPrescaler value for the timer prescaler.
MACRUM 0:615f90842ce8 195 * This parameter must be an uint8_t.
MACRUM 0:615f90842ce8 196 * @retval None.
MACRUM 0:615f90842ce8 197 */
MACRUM 0:615f90842ce8 198 void SpiritTimerSetRxTimeout(uint8_t cCounter , uint8_t cPrescaler)
MACRUM 0:615f90842ce8 199 {
MACRUM 0:615f90842ce8 200 uint8_t tempRegValue[2]={cPrescaler,cCounter};
MACRUM 0:615f90842ce8 201
MACRUM 0:615f90842ce8 202 /* Writes the prescaler and counter value for RX timeout in the corresponding register */
MACRUM 0:615f90842ce8 203 g_xStatus = SpiritSpiWriteRegisters(TIMERS5_RX_TIMEOUT_PRESCALER_BASE, 2, tempRegValue);
MACRUM 0:615f90842ce8 204
MACRUM 0:615f90842ce8 205 }
MACRUM 0:615f90842ce8 206
MACRUM 0:615f90842ce8 207
MACRUM 0:615f90842ce8 208 /**
MACRUM 0:615f90842ce8 209 * @brief Sets the RX timeout timer counter and prescaler from the desired value in ms. it is possible to fix the RX_Timeout to
MACRUM 0:615f90842ce8 210 * a minimum value of 50.417us to a maximum value of about 3.28 s.
MACRUM 0:615f90842ce8 211 * @param fDesiredMsec desired timer value.
MACRUM 0:615f90842ce8 212 * This parameter must be a float.
MACRUM 0:615f90842ce8 213 * @retval None
MACRUM 0:615f90842ce8 214 */
MACRUM 0:615f90842ce8 215
MACRUM 0:615f90842ce8 216 void SpiritTimerSetRxTimeoutMs(float fDesiredMsec)
MACRUM 0:615f90842ce8 217 {
MACRUM 0:615f90842ce8 218 uint8_t tempRegValue[2];
MACRUM 0:615f90842ce8 219
MACRUM 0:615f90842ce8 220 /* Computes the counter and prescaler value */
MACRUM 0:615f90842ce8 221 SpiritTimerComputeRxTimeoutValues(fDesiredMsec , &tempRegValue[1] , &tempRegValue[0]);
MACRUM 0:615f90842ce8 222
MACRUM 0:615f90842ce8 223 /* Writes the prescaler and counter value for RX timeout in the corresponding register */
MACRUM 0:615f90842ce8 224 g_xStatus = SpiritSpiWriteRegisters(TIMERS5_RX_TIMEOUT_PRESCALER_BASE, 2, tempRegValue);
MACRUM 0:615f90842ce8 225
MACRUM 0:615f90842ce8 226 }
MACRUM 0:615f90842ce8 227
MACRUM 0:615f90842ce8 228
MACRUM 0:615f90842ce8 229 /**
MACRUM 0:615f90842ce8 230 * @brief Sets the RX timeout timer counter. If it is equal to 0 the timeout is infinite.
MACRUM 0:615f90842ce8 231 * @param cCounter value for the timer counter.
MACRUM 0:615f90842ce8 232 * This parameter must be an uint8_t.
MACRUM 0:615f90842ce8 233 * @retval None.
MACRUM 0:615f90842ce8 234 */
MACRUM 0:615f90842ce8 235 void SpiritTimerSetRxTimeoutCounter(uint8_t cCounter)
MACRUM 0:615f90842ce8 236 {
MACRUM 0:615f90842ce8 237 /* Writes the counter value for RX timeout in the corresponding register */
MACRUM 0:615f90842ce8 238 g_xStatus = SpiritSpiWriteRegisters(TIMERS4_RX_TIMEOUT_COUNTER_BASE, 1, &cCounter);
MACRUM 0:615f90842ce8 239
MACRUM 0:615f90842ce8 240 }
MACRUM 0:615f90842ce8 241
MACRUM 0:615f90842ce8 242
MACRUM 0:615f90842ce8 243 /**
MACRUM 0:615f90842ce8 244 * @brief Sets the RX timeout timer prescaler. If it is equal to 0 the timeout is infinite.
MACRUM 0:615f90842ce8 245 * @param cPrescaler value for the timer prescaler.
MACRUM 0:615f90842ce8 246 * This parameter must be an uint8_t.
MACRUM 0:615f90842ce8 247 * @retval None
MACRUM 0:615f90842ce8 248 */
MACRUM 0:615f90842ce8 249 void SpiritTimerSetRxTimeoutPrescaler(uint8_t cPrescaler)
MACRUM 0:615f90842ce8 250 {
MACRUM 0:615f90842ce8 251 /* Writes the prescaler value for RX timeout in the corresponding register */
MACRUM 0:615f90842ce8 252 g_xStatus = SpiritSpiWriteRegisters(TIMERS5_RX_TIMEOUT_PRESCALER_BASE, 1, &cPrescaler);
MACRUM 0:615f90842ce8 253
MACRUM 0:615f90842ce8 254 }
MACRUM 0:615f90842ce8 255
MACRUM 0:615f90842ce8 256
MACRUM 0:615f90842ce8 257 /**
MACRUM 0:615f90842ce8 258 * @brief Returns the RX timeout timer.
MACRUM 0:615f90842ce8 259 * @param pfTimeoutMsec pointer to the variable in which the timeout expressed in milliseconds has to be stored.
MACRUM 0:615f90842ce8 260 * If the returned value is 0, it means that the RX_Timeout is infinite.
MACRUM 0:615f90842ce8 261 * This parameter must be a float*.
MACRUM 0:615f90842ce8 262 * @param pcCounter pointer to the variable in which the timer counter has to be stored.
MACRUM 0:615f90842ce8 263 * This parameter must be an uint8_t*.
MACRUM 0:615f90842ce8 264 * @param pcPrescaler pointer to the variable in which the timer prescaler has to be stored.
MACRUM 0:615f90842ce8 265 * This parameter must be an uint8_t*.
MACRUM 0:615f90842ce8 266 * @retval None.
MACRUM 0:615f90842ce8 267 */
MACRUM 0:615f90842ce8 268 void SpiritTimerGetRxTimeout(float* pfTimeoutMsec, uint8_t* pcCounter , uint8_t* pcPrescaler)
MACRUM 0:615f90842ce8 269 {
MACRUM 0:615f90842ce8 270 uint8_t tempRegValue[2];
MACRUM 0:615f90842ce8 271
MACRUM 0:615f90842ce8 272 /* Reads the RX timeout registers value */
MACRUM 0:615f90842ce8 273 g_xStatus = SpiritSpiReadRegisters(TIMERS5_RX_TIMEOUT_PRESCALER_BASE, 2, tempRegValue);
MACRUM 0:615f90842ce8 274
MACRUM 0:615f90842ce8 275 /* Returns values */
MACRUM 0:615f90842ce8 276 (*pcPrescaler) = tempRegValue[0];
MACRUM 0:615f90842ce8 277 (*pcCounter) = tempRegValue[1];
MACRUM 0:615f90842ce8 278
MACRUM 0:615f90842ce8 279 float nXtalFrequency = (float)SpiritRadioGetXtalFrequency();
MACRUM 0:615f90842ce8 280 if(nXtalFrequency>DOUBLE_XTAL_THR) {
MACRUM 0:615f90842ce8 281 nXtalFrequency /= 2.0;
MACRUM 0:615f90842ce8 282 }
MACRUM 0:615f90842ce8 283 nXtalFrequency /= 1000.0;
MACRUM 0:615f90842ce8 284 *pfTimeoutMsec = (float)((tempRegValue[0]+1)*tempRegValue[1]*(1210.0/nXtalFrequency));
MACRUM 0:615f90842ce8 285
MACRUM 0:615f90842ce8 286
MACRUM 0:615f90842ce8 287 }
MACRUM 0:615f90842ce8 288
MACRUM 0:615f90842ce8 289
MACRUM 0:615f90842ce8 290 /**
MACRUM 0:615f90842ce8 291 * @brief Sets the LDCR wake up timer initialization registers with the values of
MACRUM 0:615f90842ce8 292 * COUNTER and PRESCALER according to the formula: Twu=(PRESCALER +1)*(COUNTER+1)*Tck, where
MACRUM 0:615f90842ce8 293 * Tck = 28.818 us. The minimum vale of the wakeup timeout is 28.818us (PRESCALER and
MACRUM 0:615f90842ce8 294 * COUNTER equals to 0) and the maximum value is about 1.89 s (PRESCALER anc COUNTER equals
MACRUM 0:615f90842ce8 295 * to 255).
MACRUM 0:615f90842ce8 296 * @param cCounter value for the timer counter.
MACRUM 0:615f90842ce8 297 * This parameter must be an uint8_t.
MACRUM 0:615f90842ce8 298 * @param cPrescaler value for the timer prescaler.
MACRUM 0:615f90842ce8 299 * This parameter must be an uint8_t.
MACRUM 0:615f90842ce8 300 * @retval None.
MACRUM 0:615f90842ce8 301 */
MACRUM 0:615f90842ce8 302 void SpiritTimerSetWakeUpTimer(uint8_t cCounter , uint8_t cPrescaler)
MACRUM 0:615f90842ce8 303 {
MACRUM 0:615f90842ce8 304 uint8_t tempRegValue[2]={cPrescaler,cCounter};
MACRUM 0:615f90842ce8 305
MACRUM 0:615f90842ce8 306 /* Writes the counter and prescaler value of wake-up timer in the corresponding register */
MACRUM 0:615f90842ce8 307 g_xStatus = SpiritSpiWriteRegisters(TIMERS3_LDC_PRESCALER_BASE, 2, tempRegValue);
MACRUM 0:615f90842ce8 308
MACRUM 0:615f90842ce8 309 }
MACRUM 0:615f90842ce8 310
MACRUM 0:615f90842ce8 311
MACRUM 0:615f90842ce8 312 /**
MACRUM 0:615f90842ce8 313 * @brief Sets the LDCR wake up timer counter and prescaler from the desired value in ms,
MACRUM 0:615f90842ce8 314 * according to the formula: Twu=(PRESCALER +1)*(COUNTER+1)*Tck, where Tck = 28.818 us.
MACRUM 0:615f90842ce8 315 * The minimum vale of the wakeup timeout is 28.818us (PRESCALER and COUNTER equals to 0)
MACRUM 0:615f90842ce8 316 * and the maximum value is about 1.89 s (PRESCALER anc COUNTER equals to 255).
MACRUM 0:615f90842ce8 317 * @param fDesiredMsec desired timer value.
MACRUM 0:615f90842ce8 318 * This parameter must be a float.
MACRUM 0:615f90842ce8 319 * @retval None.
MACRUM 0:615f90842ce8 320 */
MACRUM 0:615f90842ce8 321 void SpiritTimerSetWakeUpTimerMs(float fDesiredMsec)
MACRUM 0:615f90842ce8 322 {
MACRUM 0:615f90842ce8 323 uint8_t tempRegValue[2];
MACRUM 0:615f90842ce8 324
MACRUM 0:615f90842ce8 325 /* Computes counter and prescaler */
MACRUM 0:615f90842ce8 326 SpiritTimerComputeWakeUpValues(fDesiredMsec , &tempRegValue[1] , &tempRegValue[0]);
MACRUM 0:615f90842ce8 327
MACRUM 0:615f90842ce8 328 /* Writes the counter and prescaler value of wake-up timer in the corresponding register */
MACRUM 0:615f90842ce8 329 g_xStatus = SpiritSpiWriteRegisters(TIMERS3_LDC_PRESCALER_BASE, 2, tempRegValue);
MACRUM 0:615f90842ce8 330
MACRUM 0:615f90842ce8 331 }
MACRUM 0:615f90842ce8 332
MACRUM 0:615f90842ce8 333
MACRUM 0:615f90842ce8 334 /**
MACRUM 0:615f90842ce8 335 * @brief Sets the LDCR wake up timer counter. Remember that this value is incresead by one in the Twu calculation.
MACRUM 0:615f90842ce8 336 * Twu=(PRESCALER +1)*(COUNTER+1)*Tck, where Tck = 28.818 us
MACRUM 0:615f90842ce8 337 * @param cCounter value for the timer counter.
MACRUM 0:615f90842ce8 338 * This parameter must be an uint8_t.
MACRUM 0:615f90842ce8 339 * @retval None.
MACRUM 0:615f90842ce8 340 */
MACRUM 0:615f90842ce8 341 void SpiritTimerSetWakeUpTimerCounter(uint8_t cCounter)
MACRUM 0:615f90842ce8 342 {
MACRUM 0:615f90842ce8 343 /* Writes the counter value for Wake_Up timer in the corresponding register */
MACRUM 0:615f90842ce8 344 g_xStatus = SpiritSpiWriteRegisters(TIMERS2_LDC_COUNTER_BASE, 1, &cCounter);
MACRUM 0:615f90842ce8 345
MACRUM 0:615f90842ce8 346 }
MACRUM 0:615f90842ce8 347
MACRUM 0:615f90842ce8 348
MACRUM 0:615f90842ce8 349 /**
MACRUM 0:615f90842ce8 350 * @brief Sets the LDCR wake up timer prescaler. Remember that this value is incresead by one in the Twu calculation.
MACRUM 0:615f90842ce8 351 * Twu=(PRESCALER +1)*(COUNTER+1)*Tck, where Tck = 28.818 us
MACRUM 0:615f90842ce8 352 * @param cPrescaler value for the timer prescaler.
MACRUM 0:615f90842ce8 353 * This parameter must be an uint8_t.
MACRUM 0:615f90842ce8 354 * @retval None.
MACRUM 0:615f90842ce8 355 */
MACRUM 0:615f90842ce8 356 void SpiritTimerSetWakeUpTimerPrescaler(uint8_t cPrescaler)
MACRUM 0:615f90842ce8 357 {
MACRUM 0:615f90842ce8 358 /* Writes the prescaler value for Wake_Up timer in the corresponding register */
MACRUM 0:615f90842ce8 359 g_xStatus = SpiritSpiWriteRegisters(TIMERS3_LDC_PRESCALER_BASE, 1, &cPrescaler);
MACRUM 0:615f90842ce8 360
MACRUM 0:615f90842ce8 361 }
MACRUM 0:615f90842ce8 362
MACRUM 0:615f90842ce8 363
MACRUM 0:615f90842ce8 364 /**
MACRUM 0:615f90842ce8 365 * @brief Returns the LDCR wake up timer, according to the formula: Twu=(PRESCALER +1)*(COUNTER+1)*Tck, where Tck = 28.818 us.
MACRUM 0:615f90842ce8 366 * @param pfWakeUpMsec pointer to the variable in which the wake-up time expressed in milliseconds has to be stored.
MACRUM 0:615f90842ce8 367 * This parameter must be a float*.
MACRUM 0:615f90842ce8 368 * @param pcCounter pointer to the variable in which the timer counter has to be stored.
MACRUM 0:615f90842ce8 369 * This parameter must be an uint8_t*.
MACRUM 0:615f90842ce8 370 * @param pcPrescaler pointer to the variable in which the timer prescaler has to be stored.
MACRUM 0:615f90842ce8 371 * This parameter must be an uint8_t*.
MACRUM 0:615f90842ce8 372 * @retval None.
MACRUM 0:615f90842ce8 373 */
MACRUM 0:615f90842ce8 374 void SpiritTimerGetWakeUpTimer(float* pfWakeUpMsec, uint8_t* pcCounter , uint8_t* pcPrescaler)
MACRUM 0:615f90842ce8 375 {
MACRUM 0:615f90842ce8 376 uint8_t tempRegValue[2];
MACRUM 0:615f90842ce8 377 //uint32_t xtal=SpiritRadioGetXtalFrequency();
MACRUM 0:615f90842ce8 378 float rco_freq;
MACRUM 0:615f90842ce8 379
MACRUM 0:615f90842ce8 380 rco_freq=(float)SpiritTimerGetRcoFrequency();
MACRUM 0:615f90842ce8 381
MACRUM 0:615f90842ce8 382 /* Reads the Wake_Up timer registers value */
MACRUM 0:615f90842ce8 383 g_xStatus = SpiritSpiReadRegisters(TIMERS3_LDC_PRESCALER_BASE, 2, tempRegValue);
MACRUM 0:615f90842ce8 384
MACRUM 0:615f90842ce8 385 /* Returns values */
MACRUM 0:615f90842ce8 386 (*pcPrescaler)=tempRegValue[0];
MACRUM 0:615f90842ce8 387 (*pcCounter)=tempRegValue[1];
MACRUM 0:615f90842ce8 388 *pfWakeUpMsec = (float)((((*pcPrescaler)+1)*((*pcCounter)+1)*(1000.0/rco_freq)));
MACRUM 0:615f90842ce8 389
MACRUM 0:615f90842ce8 390 }
MACRUM 0:615f90842ce8 391
MACRUM 0:615f90842ce8 392
MACRUM 0:615f90842ce8 393 /**
MACRUM 0:615f90842ce8 394 * @brief Sets the LDCR wake up timer reloading registers with the values of
MACRUM 0:615f90842ce8 395 * COUNTER and PRESCALER according to the formula: Twu=(PRESCALER +1)*(COUNTER+1)*Tck, where
MACRUM 0:615f90842ce8 396 * Tck = 28.818 us. The minimum vale of the wakeup timeout is 28.818us (PRESCALER and
MACRUM 0:615f90842ce8 397 * COUNTER equals to 0) and the maximum value is about 1.89 s (PRESCALER anc COUNTER equals
MACRUM 0:615f90842ce8 398 * to 255).
MACRUM 0:615f90842ce8 399 * @param cCounter reload value for the timer counter.
MACRUM 0:615f90842ce8 400 * This parameter must be an uint8_t.
MACRUM 0:615f90842ce8 401 * @param cPrescaler reload value for the timer prescaler.
MACRUM 0:615f90842ce8 402 * This parameter must be an uint8_t.
MACRUM 0:615f90842ce8 403 * @retval None.
MACRUM 0:615f90842ce8 404 */
MACRUM 0:615f90842ce8 405 void SpiritTimerSetWakeUpTimerReload(uint8_t cCounter , uint8_t cPrescaler)
MACRUM 0:615f90842ce8 406 {
MACRUM 0:615f90842ce8 407 uint8_t tempRegValue[2]={cPrescaler,cCounter};
MACRUM 0:615f90842ce8 408
MACRUM 0:615f90842ce8 409 /* Writes the counter and prescaler value of reload wake-up timer in the corresponding register */
MACRUM 0:615f90842ce8 410 g_xStatus = SpiritSpiWriteRegisters(TIMERS1_LDC_RELOAD_PRESCALER_BASE, 2, tempRegValue);
MACRUM 0:615f90842ce8 411
MACRUM 0:615f90842ce8 412 }
MACRUM 0:615f90842ce8 413
MACRUM 0:615f90842ce8 414
MACRUM 0:615f90842ce8 415 /**
MACRUM 0:615f90842ce8 416 * @brief Sets the LDCR wake up reload timer counter and prescaler from the desired value in ms,
MACRUM 0:615f90842ce8 417 * according to the formula: Twu=(PRESCALER +1)*(COUNTER+1)*Tck, where Tck = 28.818 us.
MACRUM 0:615f90842ce8 418 * The minimum vale of the wakeup timeout is 28.818us (PRESCALER and COUNTER equals to 0)
MACRUM 0:615f90842ce8 419 * and the maximum value is about 1.89 s (PRESCALER anc COUNTER equals to 255).
MACRUM 0:615f90842ce8 420 * @param fDesiredMsec desired timer value.
MACRUM 0:615f90842ce8 421 * This parameter must be a float.
MACRUM 0:615f90842ce8 422 * @retval None.
MACRUM 0:615f90842ce8 423 */
MACRUM 0:615f90842ce8 424 void SpiritTimerSetWakeUpTimerReloadMs(float fDesiredMsec)
MACRUM 0:615f90842ce8 425 {
MACRUM 0:615f90842ce8 426 uint8_t tempRegValue[2];
MACRUM 0:615f90842ce8 427
MACRUM 0:615f90842ce8 428 /* Computes counter and prescaler */
MACRUM 0:615f90842ce8 429 SpiritTimerComputeWakeUpValues(fDesiredMsec , &tempRegValue[1] , &tempRegValue[0]);
MACRUM 0:615f90842ce8 430
MACRUM 0:615f90842ce8 431 /* Writes the counter and prescaler value of reload wake-up timer in the corresponding register */
MACRUM 0:615f90842ce8 432 g_xStatus = SpiritSpiWriteRegisters(TIMERS1_LDC_RELOAD_PRESCALER_BASE, 2, tempRegValue);
MACRUM 0:615f90842ce8 433
MACRUM 0:615f90842ce8 434 }
MACRUM 0:615f90842ce8 435
MACRUM 0:615f90842ce8 436
MACRUM 0:615f90842ce8 437 /**
MACRUM 0:615f90842ce8 438 * @brief Sets the LDCR wake up timer reload counter. Remember that this value is incresead by one in the Twu calculation.
MACRUM 0:615f90842ce8 439 * Twu=(PRESCALER +1)*(COUNTER+1)*Tck, where Tck = 28.818 us
MACRUM 0:615f90842ce8 440 * @param cCounter value for the timer counter.
MACRUM 0:615f90842ce8 441 * This parameter must be an uint8_t.
MACRUM 0:615f90842ce8 442 * @retval None
MACRUM 0:615f90842ce8 443 */
MACRUM 0:615f90842ce8 444 void SpiritTimerSetWakeUpTimerReloadCounter(uint8_t cCounter)
MACRUM 0:615f90842ce8 445 {
MACRUM 0:615f90842ce8 446 /* Writes the counter value for reload Wake_Up timer in the corresponding register */
MACRUM 0:615f90842ce8 447 g_xStatus = SpiritSpiWriteRegisters(TIMERS0_LDC_RELOAD_COUNTER_BASE, 1, &cCounter);
MACRUM 0:615f90842ce8 448
MACRUM 0:615f90842ce8 449 }
MACRUM 0:615f90842ce8 450
MACRUM 0:615f90842ce8 451
MACRUM 0:615f90842ce8 452 /**
MACRUM 0:615f90842ce8 453 * @brief Sets the LDCR wake up timer reload prescaler. Remember that this value is incresead by one in the Twu calculation.
MACRUM 0:615f90842ce8 454 * Twu=(PRESCALER +1)*(COUNTER+1)*Tck, where Tck = 28.818 us
MACRUM 0:615f90842ce8 455 * @param cPrescaler value for the timer prescaler.
MACRUM 0:615f90842ce8 456 * This parameter must be an uint8_t.
MACRUM 0:615f90842ce8 457 * @retval None
MACRUM 0:615f90842ce8 458 */
MACRUM 0:615f90842ce8 459 void SpiritTimerSetWakeUpTimerReloadPrescaler(uint8_t cPrescaler)
MACRUM 0:615f90842ce8 460 {
MACRUM 0:615f90842ce8 461 /* Writes the prescaler value for reload Wake_Up timer in the corresponding register */
MACRUM 0:615f90842ce8 462 g_xStatus = SpiritSpiWriteRegisters(TIMERS1_LDC_RELOAD_PRESCALER_BASE, 1, &cPrescaler);
MACRUM 0:615f90842ce8 463
MACRUM 0:615f90842ce8 464 }
MACRUM 0:615f90842ce8 465
MACRUM 0:615f90842ce8 466
MACRUM 0:615f90842ce8 467 /**
MACRUM 0:615f90842ce8 468 * @brief Returns the LDCR wake up reload timer, according to the formula: Twu=(PRESCALER +1)*(COUNTER+1)*Tck, where Tck = 28.818 us.
MACRUM 0:615f90842ce8 469 * @param pfWakeUpReloadMsec pointer to the variable in which the wake-up reload time expressed in milliseconds has to be stored.
MACRUM 0:615f90842ce8 470 * This parameter must be a float*.
MACRUM 0:615f90842ce8 471 * @param pcCounter pointer to the variable in which the timer counter has to be stored.
MACRUM 0:615f90842ce8 472 * This parameter must be an uint8_t*.
MACRUM 0:615f90842ce8 473 * @param pcPrescaler pointer to the variable in which the timer prescaler has to be stored.
MACRUM 0:615f90842ce8 474 * This parameter must be an uint8_t*.
MACRUM 0:615f90842ce8 475 * @retval None.
MACRUM 0:615f90842ce8 476 */
MACRUM 0:615f90842ce8 477 void SpiritTimerGetWakeUpTimerReload(float* pfWakeUpReloadMsec, uint8_t* pcCounter , uint8_t* pcPrescaler)
MACRUM 0:615f90842ce8 478 {
MACRUM 0:615f90842ce8 479 uint8_t tempRegValue[2];
MACRUM 0:615f90842ce8 480 //uint32_t xtal=SpiritRadioGetXtalFrequency();
MACRUM 0:615f90842ce8 481 float rco_freq;
MACRUM 0:615f90842ce8 482
MACRUM 0:615f90842ce8 483 rco_freq=(float)SpiritTimerGetRcoFrequency();
MACRUM 0:615f90842ce8 484
MACRUM 0:615f90842ce8 485 /* Reads the reload Wake_Up timer registers value */
MACRUM 0:615f90842ce8 486 g_xStatus = SpiritSpiReadRegisters(TIMERS1_LDC_RELOAD_PRESCALER_BASE, 2, tempRegValue);
MACRUM 0:615f90842ce8 487
MACRUM 0:615f90842ce8 488 /* Returns values */
MACRUM 0:615f90842ce8 489 (*pcPrescaler)=tempRegValue[0];
MACRUM 0:615f90842ce8 490 (*pcCounter)=tempRegValue[1];
MACRUM 0:615f90842ce8 491 *pfWakeUpReloadMsec = (float)((((*pcPrescaler)+1)*((*pcCounter)+1)*(1000.0/rco_freq)));
MACRUM 0:615f90842ce8 492
MACRUM 0:615f90842ce8 493 }
MACRUM 0:615f90842ce8 494
MACRUM 0:615f90842ce8 495 /**
MACRUM 0:615f90842ce8 496 * @brief Computes and returns the RCO frequency.
MACRUM 0:615f90842ce8 497 * This frequency depends on the xtal frequency and the XTAL bit in register 0x01.
MACRUM 0:615f90842ce8 498 * @retval RCO frequency in Hz as an uint16_t.
MACRUM 0:615f90842ce8 499 */
MACRUM 0:615f90842ce8 500 uint16_t SpiritTimerGetRcoFrequency(void)
MACRUM 0:615f90842ce8 501 {
MACRUM 0:615f90842ce8 502 uint16_t rco_freq=34700;
MACRUM 0:615f90842ce8 503 uint32_t xtal=SpiritRadioGetXtalFrequency();
MACRUM 0:615f90842ce8 504
MACRUM 0:615f90842ce8 505 if(xtal>30000000) xtal/=2;
MACRUM 0:615f90842ce8 506
MACRUM 0:615f90842ce8 507 if(xtal==25000000)
MACRUM 0:615f90842ce8 508 {
MACRUM 0:615f90842ce8 509 uint8_t xtal_flag;
MACRUM 0:615f90842ce8 510 SpiritSpiReadRegisters(0x01, 1, &xtal_flag);
MACRUM 0:615f90842ce8 511 xtal_flag=(xtal_flag&0x40);
MACRUM 0:615f90842ce8 512
MACRUM 0:615f90842ce8 513 if(xtal_flag==0)
MACRUM 0:615f90842ce8 514 {
MACRUM 0:615f90842ce8 515 rco_freq=36100;
MACRUM 0:615f90842ce8 516 }
MACRUM 0:615f90842ce8 517 else
MACRUM 0:615f90842ce8 518 {
MACRUM 0:615f90842ce8 519 rco_freq=33300;
MACRUM 0:615f90842ce8 520 }
MACRUM 0:615f90842ce8 521 }
MACRUM 0:615f90842ce8 522
MACRUM 0:615f90842ce8 523 return rco_freq;
MACRUM 0:615f90842ce8 524 }
MACRUM 0:615f90842ce8 525
MACRUM 0:615f90842ce8 526 /**
MACRUM 0:615f90842ce8 527 * @brief Computes the values of the wakeup timer counter and prescaler from the user time expressed in millisecond.
MACRUM 0:615f90842ce8 528 * The prescaler and the counter values are computed maintaining the prescaler value as
MACRUM 0:615f90842ce8 529 * small as possible in order to obtain the best resolution, and in the meantime minimizing the error.
MACRUM 0:615f90842ce8 530 * @param fDesiredMsec desired wakeup timeout in millisecs.
MACRUM 0:615f90842ce8 531 * This parameter must be a float. Since the counter and prescaler are 8 bit registers the maximum
MACRUM 0:615f90842ce8 532 * reachable value is maxTime = fTclk x 256 x 256.
MACRUM 0:615f90842ce8 533 * @param pcCounter pointer to the variable in which the value for the wakeup timer counter has to be stored.
MACRUM 0:615f90842ce8 534 * This parameter must be a uint8_t*.
MACRUM 0:615f90842ce8 535 * @param pcPrescaler pointer to the variable in which the value for the wakeup timer prescaler has to be stored.
MACRUM 0:615f90842ce8 536 * This parameter must be an uint8_t*.
MACRUM 0:615f90842ce8 537 * @retval None
MACRUM 0:615f90842ce8 538 */
MACRUM 0:615f90842ce8 539 void SpiritTimerComputeWakeUpValues(float fDesiredMsec , uint8_t* pcCounter , uint8_t* pcPrescaler)
MACRUM 0:615f90842ce8 540 {
MACRUM 0:615f90842ce8 541 float rco_freq,err;
MACRUM 0:615f90842ce8 542 uint32_t n;
MACRUM 0:615f90842ce8 543
MACRUM 0:615f90842ce8 544 rco_freq=((float)SpiritTimerGetRcoFrequency())/1000;
MACRUM 0:615f90842ce8 545
MACRUM 0:615f90842ce8 546 /* N cycles in the time base of the timer:
MACRUM 0:615f90842ce8 547 - clock of the timer is RCO frequency
MACRUM 0:615f90842ce8 548 - divide times 1000 more because we have an input in ms (variable rco_freq is already this frequency divided by 1000)
MACRUM 0:615f90842ce8 549 */
MACRUM 0:615f90842ce8 550 n=(uint32_t)(fDesiredMsec*rco_freq);
MACRUM 0:615f90842ce8 551
MACRUM 0:615f90842ce8 552 /* check if it is possible to reach that target with prescaler and counter of spirit1 */
MACRUM 0:615f90842ce8 553 if(n/0xFF>0xFD)
MACRUM 0:615f90842ce8 554 {
MACRUM 0:615f90842ce8 555 /* if not return the maximum possible value */
MACRUM 0:615f90842ce8 556 (*pcCounter) = 0xFF;
MACRUM 0:615f90842ce8 557 (*pcPrescaler) = 0xFF;
MACRUM 0:615f90842ce8 558 return;
MACRUM 0:615f90842ce8 559 }
MACRUM 0:615f90842ce8 560
MACRUM 0:615f90842ce8 561 /* prescaler is really 2 as min value */
MACRUM 0:615f90842ce8 562 (*pcPrescaler)=(n/0xFF)+2;
MACRUM 0:615f90842ce8 563 (*pcCounter) = n / (*pcPrescaler);
MACRUM 0:615f90842ce8 564
MACRUM 0:615f90842ce8 565 /* check if the error is minimum */
MACRUM 0:615f90842ce8 566 err=S_ABS((float)(*pcCounter)*(*pcPrescaler)/rco_freq-fDesiredMsec);
MACRUM 0:615f90842ce8 567
MACRUM 0:615f90842ce8 568 if((*pcCounter)<=254)
MACRUM 0:615f90842ce8 569 {
MACRUM 0:615f90842ce8 570 if(S_ABS((float)((*pcCounter)+1)*(*pcPrescaler)/rco_freq-fDesiredMsec)<err)
MACRUM 0:615f90842ce8 571 (*pcCounter)=(*pcCounter)+1;
MACRUM 0:615f90842ce8 572 }
MACRUM 0:615f90842ce8 573
MACRUM 0:615f90842ce8 574 /* decrement prescaler and counter according to the logic of this timer in spirit1 */
MACRUM 0:615f90842ce8 575 (*pcPrescaler)--;
MACRUM 0:615f90842ce8 576 if((*pcCounter)>1)
MACRUM 0:615f90842ce8 577 (*pcCounter)--;
MACRUM 0:615f90842ce8 578 else
MACRUM 0:615f90842ce8 579 (*pcCounter)=1;
MACRUM 0:615f90842ce8 580 }
MACRUM 0:615f90842ce8 581
MACRUM 0:615f90842ce8 582
MACRUM 0:615f90842ce8 583 /**
MACRUM 0:615f90842ce8 584 * @brief Computes the values of the rx_timeout timer counter and prescaler from the user time expressed in millisecond.
MACRUM 0:615f90842ce8 585 * The prescaler and the counter values are computed maintaining the prescaler value as
MACRUM 0:615f90842ce8 586 * small as possible in order to obtain the best resolution, and in the meantime minimizing the error.
MACRUM 0:615f90842ce8 587 * @param fDesiredMsec desired rx_timeout in millisecs.
MACRUM 0:615f90842ce8 588 * This parameter must be a float. Since the counter and prescaler are 8 bit registers the maximum
MACRUM 0:615f90842ce8 589 * reachable value is maxTime = fTclk x 255 x 255.
MACRUM 0:615f90842ce8 590 * @param pcCounter pointer to the variable in which the value for the rx_timeout counter has to be stored.
MACRUM 0:615f90842ce8 591 * This parameter must be a uint8_t*.
MACRUM 0:615f90842ce8 592 * @param pcPrescaler pointer to the variable in which the value for the rx_timeout prescaler has to be stored.
MACRUM 0:615f90842ce8 593 * This parameter must be an uint8_t*.
MACRUM 0:615f90842ce8 594 * @retval None
MACRUM 0:615f90842ce8 595 */
MACRUM 0:615f90842ce8 596 void SpiritTimerComputeRxTimeoutValues(float fDesiredMsec , uint8_t* pcCounter , uint8_t* pcPrescaler)
MACRUM 0:615f90842ce8 597 {
MACRUM 0:615f90842ce8 598 uint32_t nXtalFrequency = SpiritRadioGetXtalFrequency();
MACRUM 0:615f90842ce8 599 uint32_t n;
MACRUM 0:615f90842ce8 600 float err;
MACRUM 0:615f90842ce8 601
MACRUM 0:615f90842ce8 602 /* if xtal is doubled divide it by 2 */
MACRUM 0:615f90842ce8 603 if(nXtalFrequency>DOUBLE_XTAL_THR) {
MACRUM 0:615f90842ce8 604 nXtalFrequency >>= 1;
MACRUM 0:615f90842ce8 605 }
MACRUM 0:615f90842ce8 606
MACRUM 0:615f90842ce8 607 /* N cycles in the time base of the timer:
MACRUM 0:615f90842ce8 608 - clock of the timer is xtal/1210
MACRUM 0:615f90842ce8 609 - divide times 1000 more because we have an input in ms
MACRUM 0:615f90842ce8 610 */
MACRUM 0:615f90842ce8 611 n=(uint32_t)(fDesiredMsec*nXtalFrequency/1210000);
MACRUM 0:615f90842ce8 612
MACRUM 0:615f90842ce8 613 /* check if it is possible to reach that target with prescaler and counter of spirit1 */
MACRUM 0:615f90842ce8 614 if(n/0xFF>0xFD)
MACRUM 0:615f90842ce8 615 {
MACRUM 0:615f90842ce8 616 /* if not return the maximum possible value */
MACRUM 0:615f90842ce8 617 (*pcCounter) = 0xFF;
MACRUM 0:615f90842ce8 618 (*pcPrescaler) = 0xFF;
MACRUM 0:615f90842ce8 619 return;
MACRUM 0:615f90842ce8 620 }
MACRUM 0:615f90842ce8 621
MACRUM 0:615f90842ce8 622 /* prescaler is really 2 as min value */
MACRUM 0:615f90842ce8 623 (*pcPrescaler)=(n/0xFF)+2;
MACRUM 0:615f90842ce8 624 (*pcCounter) = n / (*pcPrescaler);
MACRUM 0:615f90842ce8 625
MACRUM 0:615f90842ce8 626 /* check if the error is minimum */
MACRUM 0:615f90842ce8 627 err=S_ABS((float)(*pcCounter)*(*pcPrescaler)*1210000/nXtalFrequency-fDesiredMsec);
MACRUM 0:615f90842ce8 628
MACRUM 0:615f90842ce8 629 if((*pcCounter)<=254)
MACRUM 0:615f90842ce8 630 {
MACRUM 0:615f90842ce8 631 if(S_ABS((float)((*pcCounter)+1)*(*pcPrescaler)*1210000/nXtalFrequency-fDesiredMsec)<err)
MACRUM 0:615f90842ce8 632 (*pcCounter)=(*pcCounter)+1;
MACRUM 0:615f90842ce8 633 }
MACRUM 0:615f90842ce8 634
MACRUM 0:615f90842ce8 635 /* decrement prescaler and counter according to the logic of this timer in spirit1 */
MACRUM 0:615f90842ce8 636 (*pcPrescaler)--;
MACRUM 0:615f90842ce8 637 if((*pcCounter)>1)
MACRUM 0:615f90842ce8 638 (*pcCounter)--;
MACRUM 0:615f90842ce8 639 else
MACRUM 0:615f90842ce8 640 (*pcCounter)=1;
MACRUM 0:615f90842ce8 641 }
MACRUM 0:615f90842ce8 642
MACRUM 0:615f90842ce8 643
MACRUM 0:615f90842ce8 644 /**
MACRUM 0:615f90842ce8 645 * @brief Sets the RX timeout stop conditions.
MACRUM 0:615f90842ce8 646 * @param xStopCondition new stop condition.
MACRUM 0:615f90842ce8 647 * This parameter can be any value of @ref RxTimeoutStopCondition.
MACRUM 0:615f90842ce8 648 * @retval None
MACRUM 0:615f90842ce8 649 */
MACRUM 0:615f90842ce8 650 void SpiritTimerSetRxTimeoutStopCondition(RxTimeoutStopCondition xStopCondition)
MACRUM 0:615f90842ce8 651 {
MACRUM 0:615f90842ce8 652 uint8_t tempRegValue[2];
MACRUM 0:615f90842ce8 653
MACRUM 0:615f90842ce8 654 /* Check the parameters */
MACRUM 0:615f90842ce8 655 s_assert_param(IS_RX_TIMEOUT_STOP_CONDITION(xStopCondition));
MACRUM 0:615f90842ce8 656
MACRUM 0:615f90842ce8 657 /* Reads value on the PKT_FLT_OPTIONS and PROTOCOL2 register */
MACRUM 0:615f90842ce8 658 g_xStatus = SpiritSpiReadRegisters(PCKT_FLT_OPTIONS_BASE, 2, tempRegValue);
MACRUM 0:615f90842ce8 659
MACRUM 0:615f90842ce8 660 tempRegValue[0] &= 0xBF;
MACRUM 0:615f90842ce8 661 tempRegValue[0] |= ((xStopCondition & 0x08) << 3);
MACRUM 0:615f90842ce8 662
MACRUM 0:615f90842ce8 663 tempRegValue[1] &= 0x1F;
MACRUM 0:615f90842ce8 664 tempRegValue[1] |= (xStopCondition << 5);
MACRUM 0:615f90842ce8 665
MACRUM 0:615f90842ce8 666 /* Writes value on the PKT_FLT_OPTIONS and PROTOCOL2 register */
MACRUM 0:615f90842ce8 667 g_xStatus = SpiritSpiWriteRegisters(PCKT_FLT_OPTIONS_BASE, 2, tempRegValue);
MACRUM 0:615f90842ce8 668
MACRUM 0:615f90842ce8 669 }
MACRUM 0:615f90842ce8 670
MACRUM 0:615f90842ce8 671 /**
MACRUM 0:615f90842ce8 672 * @brief Sends the LDC_RELOAD command to SPIRIT. Reload the LDC timer with the value stored in the LDC_PRESCALER / COUNTER registers.
MACRUM 0:615f90842ce8 673 * @param None.
MACRUM 0:615f90842ce8 674 * @retval None
MACRUM 0:615f90842ce8 675 */
MACRUM 0:615f90842ce8 676 void SpiritTimerReloadStrobe(void)
MACRUM 0:615f90842ce8 677 {
MACRUM 0:615f90842ce8 678 /* Sends the CMD_LDC_RELOAD command */
MACRUM 0:615f90842ce8 679 g_xStatus = SpiritSpiCommandStrobes(COMMAND_LDC_RELOAD);
MACRUM 0:615f90842ce8 680
MACRUM 0:615f90842ce8 681 }
MACRUM 0:615f90842ce8 682
MACRUM 0:615f90842ce8 683
MACRUM 0:615f90842ce8 684 /**
MACRUM 0:615f90842ce8 685 *@}
MACRUM 0:615f90842ce8 686 */
MACRUM 0:615f90842ce8 687
MACRUM 0:615f90842ce8 688
MACRUM 0:615f90842ce8 689 /**
MACRUM 0:615f90842ce8 690 *@}
MACRUM 0:615f90842ce8 691 */
MACRUM 0:615f90842ce8 692
MACRUM 0:615f90842ce8 693
MACRUM 0:615f90842ce8 694 /**
MACRUM 0:615f90842ce8 695 *@}
MACRUM 0:615f90842ce8 696 */
MACRUM 0:615f90842ce8 697
MACRUM 0:615f90842ce8 698
MACRUM 0:615f90842ce8 699
MACRUM 0:615f90842ce8 700 /******************* (C) COPYRIGHT 2015 STMicroelectronics *****END OF FILE****/