Mateusz Kowalik / Application_danix

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Fork of Application by Daniel Sygut

mbed-dev/targets/TARGET_Silicon_Labs/TARGET_EFM32/emlib/src/em_gpio.c@10:41552d038a69, 2017-01-10 (annotated)

Committer:
Zaitsev
Date:
Tue Jan 10 20:42:26 2017 +0000
Revision:
10:41552d038a69
USB Serial bi-directional bridge

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Zaitsev 10:41552d038a69 1 /***************************************************************************//**
Zaitsev 10:41552d038a69 2 * @file em_gpio.c
Zaitsev 10:41552d038a69 3 * @brief General Purpose IO (GPIO) peripheral API
Zaitsev 10:41552d038a69 4 * devices.
Zaitsev 10:41552d038a69 5 * @version 5.0.0
Zaitsev 10:41552d038a69 6 *******************************************************************************
Zaitsev 10:41552d038a69 7 * @section License
Zaitsev 10:41552d038a69 8 * <b>Copyright 2016 Silicon Laboratories, Inc. http://www.silabs.com</b>
Zaitsev 10:41552d038a69 9 *******************************************************************************
Zaitsev 10:41552d038a69 10 *
Zaitsev 10:41552d038a69 11 * Permission is granted to anyone to use this software for any purpose,
Zaitsev 10:41552d038a69 12 * including commercial applications, and to alter it and redistribute it
Zaitsev 10:41552d038a69 13 * freely, subject to the following restrictions:
Zaitsev 10:41552d038a69 14 *
Zaitsev 10:41552d038a69 15 * 1. The origin of this software must not be misrepresented; you must not
Zaitsev 10:41552d038a69 16 * claim that you wrote the original software.
Zaitsev 10:41552d038a69 17 * 2. Altered source versions must be plainly marked as such, and must not be
Zaitsev 10:41552d038a69 18 * misrepresented as being the original software.
Zaitsev 10:41552d038a69 19 * 3. This notice may not be removed or altered from any source distribution.
Zaitsev 10:41552d038a69 20 *
Zaitsev 10:41552d038a69 21 * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no
Zaitsev 10:41552d038a69 22 * obligation to support this Software. Silicon Labs is providing the
Zaitsev 10:41552d038a69 23 * Software "AS IS", with no express or implied warranties of any kind,
Zaitsev 10:41552d038a69 24 * including, but not limited to, any implied warranties of merchantability
Zaitsev 10:41552d038a69 25 * or fitness for any particular purpose or warranties against infringement
Zaitsev 10:41552d038a69 26 * of any proprietary rights of a third party.
Zaitsev 10:41552d038a69 27 *
Zaitsev 10:41552d038a69 28 * Silicon Labs will not be liable for any consequential, incidental, or
Zaitsev 10:41552d038a69 29 * special damages, or any other relief, or for any claim by any third party,
Zaitsev 10:41552d038a69 30 * arising from your use of this Software.
Zaitsev 10:41552d038a69 31 *
Zaitsev 10:41552d038a69 32 ******************************************************************************/
Zaitsev 10:41552d038a69 33
Zaitsev 10:41552d038a69 34
Zaitsev 10:41552d038a69 35 #include "em_gpio.h"
Zaitsev 10:41552d038a69 36
Zaitsev 10:41552d038a69 37 #if defined(GPIO_COUNT) && (GPIO_COUNT > 0)
Zaitsev 10:41552d038a69 38
Zaitsev 10:41552d038a69 39 /***************************************************************************//**
Zaitsev 10:41552d038a69 40 * @addtogroup emlib
Zaitsev 10:41552d038a69 41 * @{
Zaitsev 10:41552d038a69 42 ******************************************************************************/
Zaitsev 10:41552d038a69 43
Zaitsev 10:41552d038a69 44 /***************************************************************************//**
Zaitsev 10:41552d038a69 45 * @addtogroup GPIO
Zaitsev 10:41552d038a69 46 * @brief General Purpose Input/Output (GPIO) API
Zaitsev 10:41552d038a69 47 * @details
Zaitsev 10:41552d038a69 48 * This module contains functions to control the GPIO peripheral of Silicon
Zaitsev 10:41552d038a69 49 * Labs 32-bit MCUs and SoCs. The GPIO peripheral is used for pin configuration
Zaitsev 10:41552d038a69 50 * and direct pin manipulation and sensing as well as routing for peripheral
Zaitsev 10:41552d038a69 51 * pin connections.
Zaitsev 10:41552d038a69 52 * @{
Zaitsev 10:41552d038a69 53 ******************************************************************************/
Zaitsev 10:41552d038a69 54
Zaitsev 10:41552d038a69 55 /*******************************************************************************
Zaitsev 10:41552d038a69 56 ******************************* DEFINES ***********************************
Zaitsev 10:41552d038a69 57 ******************************************************************************/
Zaitsev 10:41552d038a69 58
Zaitsev 10:41552d038a69 59 /** @cond DO_NOT_INCLUDE_WITH_DOXYGEN */
Zaitsev 10:41552d038a69 60
Zaitsev 10:41552d038a69 61 /** Validation of pin typically usable in assert statements. */
Zaitsev 10:41552d038a69 62 #define GPIO_DRIVEMODE_VALID(mode) ((mode) <= 3)
Zaitsev 10:41552d038a69 63 #define GPIO_STRENGHT_VALID(strenght) (!((strenght) & \
Zaitsev 10:41552d038a69 64 ~(_GPIO_P_CTRL_DRIVESTRENGTH_MASK \
Zaitsev 10:41552d038a69 65 | _GPIO_P_CTRL_DRIVESTRENGTHALT_MASK)))
Zaitsev 10:41552d038a69 66 /** @endcond */
Zaitsev 10:41552d038a69 67
Zaitsev 10:41552d038a69 68
Zaitsev 10:41552d038a69 69 /*******************************************************************************
Zaitsev 10:41552d038a69 70 ************************** GLOBAL FUNCTIONS *******************************
Zaitsev 10:41552d038a69 71 ******************************************************************************/
Zaitsev 10:41552d038a69 72
Zaitsev 10:41552d038a69 73 /***************************************************************************//**
Zaitsev 10:41552d038a69 74 * @brief
Zaitsev 10:41552d038a69 75 * Sets the pin location of the debug pins (Serial Wire interface).
Zaitsev 10:41552d038a69 76 *
Zaitsev 10:41552d038a69 77 * @note
Zaitsev 10:41552d038a69 78 * Changing the pins used for debugging uncontrolled, may result in a lockout.
Zaitsev 10:41552d038a69 79 *
Zaitsev 10:41552d038a69 80 * @param[in] location
Zaitsev 10:41552d038a69 81 * The debug pin location to use (0-3).
Zaitsev 10:41552d038a69 82 ******************************************************************************/
Zaitsev 10:41552d038a69 83 void GPIO_DbgLocationSet(unsigned int location)
Zaitsev 10:41552d038a69 84 {
Zaitsev 10:41552d038a69 85 #if defined ( _GPIO_ROUTE_SWLOCATION_MASK )
Zaitsev 10:41552d038a69 86 EFM_ASSERT(location < AFCHANLOC_MAX);
Zaitsev 10:41552d038a69 87
Zaitsev 10:41552d038a69 88 GPIO->ROUTE = (GPIO->ROUTE & ~_GPIO_ROUTE_SWLOCATION_MASK) |
Zaitsev 10:41552d038a69 89 (location << _GPIO_ROUTE_SWLOCATION_SHIFT);
Zaitsev 10:41552d038a69 90 #else
Zaitsev 10:41552d038a69 91 (void)location;
Zaitsev 10:41552d038a69 92 #endif
Zaitsev 10:41552d038a69 93 }
Zaitsev 10:41552d038a69 94
Zaitsev 10:41552d038a69 95 #if defined (_GPIO_P_CTRL_DRIVEMODE_MASK)
Zaitsev 10:41552d038a69 96 /***************************************************************************//**
Zaitsev 10:41552d038a69 97 * @brief
Zaitsev 10:41552d038a69 98 * Sets the drive mode for a GPIO port.
Zaitsev 10:41552d038a69 99 *
Zaitsev 10:41552d038a69 100 * @param[in] port
Zaitsev 10:41552d038a69 101 * The GPIO port to access.
Zaitsev 10:41552d038a69 102 *
Zaitsev 10:41552d038a69 103 * @param[in] mode
Zaitsev 10:41552d038a69 104 * Drive mode to use for port.
Zaitsev 10:41552d038a69 105 ******************************************************************************/
Zaitsev 10:41552d038a69 106 void GPIO_DriveModeSet(GPIO_Port_TypeDef port, GPIO_DriveMode_TypeDef mode)
Zaitsev 10:41552d038a69 107 {
Zaitsev 10:41552d038a69 108 EFM_ASSERT(GPIO_PORT_VALID(port) && GPIO_DRIVEMODE_VALID(mode));
Zaitsev 10:41552d038a69 109
Zaitsev 10:41552d038a69 110 GPIO->P[port].CTRL = (GPIO->P[port].CTRL & ~(_GPIO_P_CTRL_DRIVEMODE_MASK))
Zaitsev 10:41552d038a69 111 | (mode << _GPIO_P_CTRL_DRIVEMODE_SHIFT);
Zaitsev 10:41552d038a69 112 }
Zaitsev 10:41552d038a69 113 #endif
Zaitsev 10:41552d038a69 114
Zaitsev 10:41552d038a69 115 #if defined (_GPIO_P_CTRL_DRIVESTRENGTH_MASK)
Zaitsev 10:41552d038a69 116 /***************************************************************************//**
Zaitsev 10:41552d038a69 117 * @brief
Zaitsev 10:41552d038a69 118 * Sets the drive strength for a GPIO port.
Zaitsev 10:41552d038a69 119 *
Zaitsev 10:41552d038a69 120 * @param[in] port
Zaitsev 10:41552d038a69 121 * The GPIO port to access.
Zaitsev 10:41552d038a69 122 *
Zaitsev 10:41552d038a69 123 * @param[in] strength
Zaitsev 10:41552d038a69 124 * Drive strength to use for port.
Zaitsev 10:41552d038a69 125 ******************************************************************************/
Zaitsev 10:41552d038a69 126 void GPIO_DriveStrengthSet(GPIO_Port_TypeDef port,
Zaitsev 10:41552d038a69 127 GPIO_DriveStrength_TypeDef strength)
Zaitsev 10:41552d038a69 128 {
Zaitsev 10:41552d038a69 129 EFM_ASSERT(GPIO_PORT_VALID(port) && GPIO_STRENGHT_VALID(strength));
Zaitsev 10:41552d038a69 130 BUS_RegMaskedWrite(&GPIO->P[port].CTRL,
Zaitsev 10:41552d038a69 131 _GPIO_P_CTRL_DRIVESTRENGTH_MASK | _GPIO_P_CTRL_DRIVESTRENGTHALT_MASK,
Zaitsev 10:41552d038a69 132 strength);
Zaitsev 10:41552d038a69 133 }
Zaitsev 10:41552d038a69 134 #endif
Zaitsev 10:41552d038a69 135
Zaitsev 10:41552d038a69 136 /***************************************************************************//**
Zaitsev 10:41552d038a69 137 * @brief
Zaitsev 10:41552d038a69 138 * Configure GPIO external pin interrupt.
Zaitsev 10:41552d038a69 139 *
Zaitsev 10:41552d038a69 140 * @details
Zaitsev 10:41552d038a69 141 * If reconfiguring a GPIO interrupt that is already enabled, it is generally
Zaitsev 10:41552d038a69 142 * recommended to disable it first, see GPIO_Disable().
Zaitsev 10:41552d038a69 143 *
Zaitsev 10:41552d038a69 144 * The actual GPIO interrupt handler must be in place before enabling the
Zaitsev 10:41552d038a69 145 * interrupt.
Zaitsev 10:41552d038a69 146 *
Zaitsev 10:41552d038a69 147 * Notice that any pending interrupt for the selected interrupt is cleared
Zaitsev 10:41552d038a69 148 * by this function.
Zaitsev 10:41552d038a69 149 *
Zaitsev 10:41552d038a69 150 * @note
Zaitsev 10:41552d038a69 151 * On platform 1 devices the pin number parameter is not used. The
Zaitsev 10:41552d038a69 152 * pin number used on these devices is hardwired to the interrupt with the
Zaitsev 10:41552d038a69 153 * same number. @n
Zaitsev 10:41552d038a69 154 * On platform 2 devices, pin number can be selected freely within a group.
Zaitsev 10:41552d038a69 155 * Interrupt numbers are divided into 4 groups (intNo / 4) and valid pin
Zaitsev 10:41552d038a69 156 * number within the interrupt groups are:
Zaitsev 10:41552d038a69 157 * 0: pins 0-3
Zaitsev 10:41552d038a69 158 * 1: pins 4-7
Zaitsev 10:41552d038a69 159 * 2: pins 8-11
Zaitsev 10:41552d038a69 160 * 3: pins 12-15
Zaitsev 10:41552d038a69 161 *
Zaitsev 10:41552d038a69 162 * @param[in] port
Zaitsev 10:41552d038a69 163 * The port to associate with @p pin.
Zaitsev 10:41552d038a69 164 *
Zaitsev 10:41552d038a69 165 * @param[in] pin
Zaitsev 10:41552d038a69 166 * The pin number on the port.
Zaitsev 10:41552d038a69 167 *
Zaitsev 10:41552d038a69 168 * @param[in] intNo
Zaitsev 10:41552d038a69 169 * The interrupt number to trigger.
Zaitsev 10:41552d038a69 170 *
Zaitsev 10:41552d038a69 171 * @param[in] risingEdge
Zaitsev 10:41552d038a69 172 * Set to true if interrupts shall be enabled on rising edge, otherwise false.
Zaitsev 10:41552d038a69 173 *
Zaitsev 10:41552d038a69 174 * @param[in] fallingEdge
Zaitsev 10:41552d038a69 175 * Set to true if interrupts shall be enabled on falling edge, otherwise false.
Zaitsev 10:41552d038a69 176 *
Zaitsev 10:41552d038a69 177 * @param[in] enable
Zaitsev 10:41552d038a69 178 * Set to true if interrupt shall be enabled after configuration completed,
Zaitsev 10:41552d038a69 179 * false to leave disabled. See GPIO_IntDisable() and GPIO_IntEnable().
Zaitsev 10:41552d038a69 180 ******************************************************************************/
Zaitsev 10:41552d038a69 181 void GPIO_ExtIntConfig(GPIO_Port_TypeDef port,
Zaitsev 10:41552d038a69 182 unsigned int pin,
Zaitsev 10:41552d038a69 183 unsigned int intNo,
Zaitsev 10:41552d038a69 184 bool risingEdge,
Zaitsev 10:41552d038a69 185 bool fallingEdge,
Zaitsev 10:41552d038a69 186 bool enable)
Zaitsev 10:41552d038a69 187 {
Zaitsev 10:41552d038a69 188 uint32_t tmp;
Zaitsev 10:41552d038a69 189 #if !defined(_GPIO_EXTIPINSELL_MASK)
Zaitsev 10:41552d038a69 190 (void)pin;
Zaitsev 10:41552d038a69 191 #endif
Zaitsev 10:41552d038a69 192
Zaitsev 10:41552d038a69 193 EFM_ASSERT(GPIO_PORT_PIN_VALID(port, pin));
Zaitsev 10:41552d038a69 194 #if defined(_GPIO_EXTIPINSELL_MASK)
Zaitsev 10:41552d038a69 195 EFM_ASSERT(GPIO_INTNO_PIN_VALID(intNo, pin));
Zaitsev 10:41552d038a69 196 #endif
Zaitsev 10:41552d038a69 197
Zaitsev 10:41552d038a69 198 /* There are two registers controlling the interrupt configuration:
Zaitsev 10:41552d038a69 199 * The EXTIPSELL register controls pins 0-7 and EXTIPSELH controls
Zaitsev 10:41552d038a69 200 * pins 8-15. */
Zaitsev 10:41552d038a69 201 if (intNo < 8)
Zaitsev 10:41552d038a69 202 {
Zaitsev 10:41552d038a69 203 BUS_RegMaskedWrite(&GPIO->EXTIPSELL,
Zaitsev 10:41552d038a69 204 _GPIO_EXTIPSELL_EXTIPSEL0_MASK
Zaitsev 10:41552d038a69 205 << (_GPIO_EXTIPSELL_EXTIPSEL1_SHIFT * intNo),
Zaitsev 10:41552d038a69 206 port << (_GPIO_EXTIPSELL_EXTIPSEL1_SHIFT * intNo));
Zaitsev 10:41552d038a69 207 }
Zaitsev 10:41552d038a69 208 else
Zaitsev 10:41552d038a69 209 {
Zaitsev 10:41552d038a69 210 tmp = intNo - 8;
Zaitsev 10:41552d038a69 211 BUS_RegMaskedWrite(&GPIO->EXTIPSELH,
Zaitsev 10:41552d038a69 212 _GPIO_EXTIPSELH_EXTIPSEL8_MASK
Zaitsev 10:41552d038a69 213 << (_GPIO_EXTIPSELH_EXTIPSEL9_SHIFT * tmp),
Zaitsev 10:41552d038a69 214 port << (_GPIO_EXTIPSELH_EXTIPSEL9_SHIFT * tmp));
Zaitsev 10:41552d038a69 215 }
Zaitsev 10:41552d038a69 216
Zaitsev 10:41552d038a69 217 #if defined(_GPIO_EXTIPINSELL_MASK)
Zaitsev 10:41552d038a69 218 /* There are two registers controlling the interrupt/pin number mapping:
Zaitsev 10:41552d038a69 219 * The EXTIPINSELL register controls interrupt 0-7 and EXTIPINSELH controls
Zaitsev 10:41552d038a69 220 * interrupt 8-15. */
Zaitsev 10:41552d038a69 221 if (intNo < 8)
Zaitsev 10:41552d038a69 222 {
Zaitsev 10:41552d038a69 223 BUS_RegMaskedWrite(&GPIO->EXTIPINSELL,
Zaitsev 10:41552d038a69 224 _GPIO_EXTIPINSELL_EXTIPINSEL0_MASK
Zaitsev 10:41552d038a69 225 << (_GPIO_EXTIPINSELL_EXTIPINSEL1_SHIFT * intNo),
Zaitsev 10:41552d038a69 226 ((pin % 4) & _GPIO_EXTIPINSELL_EXTIPINSEL0_MASK)
Zaitsev 10:41552d038a69 227 << (_GPIO_EXTIPINSELL_EXTIPINSEL1_SHIFT * intNo));
Zaitsev 10:41552d038a69 228 }
Zaitsev 10:41552d038a69 229 else
Zaitsev 10:41552d038a69 230 {
Zaitsev 10:41552d038a69 231 BUS_RegMaskedWrite(&GPIO->EXTIPINSELH,
Zaitsev 10:41552d038a69 232 _GPIO_EXTIPINSELH_EXTIPINSEL8_MASK
Zaitsev 10:41552d038a69 233 << (_GPIO_EXTIPINSELH_EXTIPINSEL9_SHIFT * tmp),
Zaitsev 10:41552d038a69 234 ((pin % 4) & _GPIO_EXTIPINSELH_EXTIPINSEL8_MASK)
Zaitsev 10:41552d038a69 235 << (_GPIO_EXTIPSELH_EXTIPSEL9_SHIFT * tmp));
Zaitsev 10:41552d038a69 236 }
Zaitsev 10:41552d038a69 237 #endif
Zaitsev 10:41552d038a69 238
Zaitsev 10:41552d038a69 239 /* Enable/disable rising edge */
Zaitsev 10:41552d038a69 240 BUS_RegBitWrite(&(GPIO->EXTIRISE), intNo, risingEdge);
Zaitsev 10:41552d038a69 241
Zaitsev 10:41552d038a69 242 /* Enable/disable falling edge */
Zaitsev 10:41552d038a69 243 BUS_RegBitWrite(&(GPIO->EXTIFALL), intNo, fallingEdge);
Zaitsev 10:41552d038a69 244
Zaitsev 10:41552d038a69 245 /* Clear any pending interrupt */
Zaitsev 10:41552d038a69 246 GPIO->IFC = 1 << intNo;
Zaitsev 10:41552d038a69 247
Zaitsev 10:41552d038a69 248 /* Finally enable/disable interrupt */
Zaitsev 10:41552d038a69 249 BUS_RegBitWrite(&(GPIO->IEN), intNo, enable);
Zaitsev 10:41552d038a69 250 }
Zaitsev 10:41552d038a69 251
Zaitsev 10:41552d038a69 252 /***************************************************************************//**
Zaitsev 10:41552d038a69 253 * @brief
Zaitsev 10:41552d038a69 254 * Set the mode for a GPIO pin.
Zaitsev 10:41552d038a69 255 *
Zaitsev 10:41552d038a69 256 * @param[in] port
Zaitsev 10:41552d038a69 257 * The GPIO port to access.
Zaitsev 10:41552d038a69 258 *
Zaitsev 10:41552d038a69 259 * @param[in] pin
Zaitsev 10:41552d038a69 260 * The pin number in the port.
Zaitsev 10:41552d038a69 261 *
Zaitsev 10:41552d038a69 262 * @param[in] mode
Zaitsev 10:41552d038a69 263 * The desired pin mode.
Zaitsev 10:41552d038a69 264 *
Zaitsev 10:41552d038a69 265 * @param[in] out
Zaitsev 10:41552d038a69 266 * Value to set for pin in DOUT register. The DOUT setting is important for
Zaitsev 10:41552d038a69 267 * even some input mode configurations, determining pull-up/down direction.
Zaitsev 10:41552d038a69 268 ******************************************************************************/
Zaitsev 10:41552d038a69 269 void GPIO_PinModeSet(GPIO_Port_TypeDef port,
Zaitsev 10:41552d038a69 270 unsigned int pin,
Zaitsev 10:41552d038a69 271 GPIO_Mode_TypeDef mode,
Zaitsev 10:41552d038a69 272 unsigned int out)
Zaitsev 10:41552d038a69 273 {
Zaitsev 10:41552d038a69 274 EFM_ASSERT(GPIO_PORT_PIN_VALID(port, pin));
Zaitsev 10:41552d038a69 275
Zaitsev 10:41552d038a69 276 /* If disabling pin, do not modify DOUT in order to reduce chance for */
Zaitsev 10:41552d038a69 277 /* glitch/spike (may not be sufficient precaution in all use cases) */
Zaitsev 10:41552d038a69 278 if (mode != gpioModeDisabled)
Zaitsev 10:41552d038a69 279 {
Zaitsev 10:41552d038a69 280 if (out)
Zaitsev 10:41552d038a69 281 {
Zaitsev 10:41552d038a69 282 GPIO_PinOutSet(port, pin);
Zaitsev 10:41552d038a69 283 }
Zaitsev 10:41552d038a69 284 else
Zaitsev 10:41552d038a69 285 {
Zaitsev 10:41552d038a69 286 GPIO_PinOutClear(port, pin);
Zaitsev 10:41552d038a69 287 }
Zaitsev 10:41552d038a69 288 }
Zaitsev 10:41552d038a69 289
Zaitsev 10:41552d038a69 290 /* There are two registers controlling the pins for each port. The MODEL
Zaitsev 10:41552d038a69 291 * register controls pins 0-7 and MODEH controls pins 8-15. */
Zaitsev 10:41552d038a69 292 if (pin < 8)
Zaitsev 10:41552d038a69 293 {
Zaitsev 10:41552d038a69 294 GPIO->P[port].MODEL = (GPIO->P[port].MODEL & ~(0xF << (pin * 4)))
Zaitsev 10:41552d038a69 295 | (mode << (pin * 4));
Zaitsev 10:41552d038a69 296 }
Zaitsev 10:41552d038a69 297 else
Zaitsev 10:41552d038a69 298 {
Zaitsev 10:41552d038a69 299 GPIO->P[port].MODEH = (GPIO->P[port].MODEH & ~(0xF << ((pin - 8) * 4)))
Zaitsev 10:41552d038a69 300 | (mode << ((pin - 8) * 4));
Zaitsev 10:41552d038a69 301 }
Zaitsev 10:41552d038a69 302
Zaitsev 10:41552d038a69 303 if (mode == gpioModeDisabled)
Zaitsev 10:41552d038a69 304 {
Zaitsev 10:41552d038a69 305 if (out)
Zaitsev 10:41552d038a69 306 {
Zaitsev 10:41552d038a69 307 GPIO_PinOutSet(port, pin);
Zaitsev 10:41552d038a69 308 }
Zaitsev 10:41552d038a69 309 else
Zaitsev 10:41552d038a69 310 {
Zaitsev 10:41552d038a69 311 GPIO_PinOutClear(port, pin);
Zaitsev 10:41552d038a69 312 }
Zaitsev 10:41552d038a69 313 }
Zaitsev 10:41552d038a69 314 }
Zaitsev 10:41552d038a69 315
Zaitsev 10:41552d038a69 316 /***************************************************************************//**
Zaitsev 10:41552d038a69 317 * @brief
Zaitsev 10:41552d038a69 318 * Get the mode for a GPIO pin.
Zaitsev 10:41552d038a69 319 *
Zaitsev 10:41552d038a69 320 * @param[in] port
Zaitsev 10:41552d038a69 321 * The GPIO port to access.
Zaitsev 10:41552d038a69 322 *
Zaitsev 10:41552d038a69 323 * @param[in] pin
Zaitsev 10:41552d038a69 324 * The pin number in the port.
Zaitsev 10:41552d038a69 325 *
Zaitsev 10:41552d038a69 326 * @return
Zaitsev 10:41552d038a69 327 * The pin mode.
Zaitsev 10:41552d038a69 328 ******************************************************************************/
Zaitsev 10:41552d038a69 329 GPIO_Mode_TypeDef GPIO_PinModeGet(GPIO_Port_TypeDef port,
Zaitsev 10:41552d038a69 330 unsigned int pin)
Zaitsev 10:41552d038a69 331 {
Zaitsev 10:41552d038a69 332 EFM_ASSERT(GPIO_PORT_PIN_VALID(port, pin));
Zaitsev 10:41552d038a69 333
Zaitsev 10:41552d038a69 334 if (pin < 8)
Zaitsev 10:41552d038a69 335 {
Zaitsev 10:41552d038a69 336 return (GPIO_Mode_TypeDef) ((GPIO->P[port].MODEL >> (pin * 4)) & 0xF);
Zaitsev 10:41552d038a69 337 }
Zaitsev 10:41552d038a69 338 else
Zaitsev 10:41552d038a69 339 {
Zaitsev 10:41552d038a69 340 return (GPIO_Mode_TypeDef) ((GPIO->P[port].MODEH >> ((pin - 8) * 4)) & 0xF);
Zaitsev 10:41552d038a69 341 }
Zaitsev 10:41552d038a69 342 }
Zaitsev 10:41552d038a69 343
Zaitsev 10:41552d038a69 344 #if defined( _GPIO_EM4WUEN_MASK )
Zaitsev 10:41552d038a69 345 /**************************************************************************//**
Zaitsev 10:41552d038a69 346 * @brief
Zaitsev 10:41552d038a69 347 * Enable GPIO pin wake-up from EM4. When the function exits,
Zaitsev 10:41552d038a69 348 * EM4 mode can be safely entered.
Zaitsev 10:41552d038a69 349 *
Zaitsev 10:41552d038a69 350 * @note
Zaitsev 10:41552d038a69 351 * It is assumed that the GPIO pin modes are set correctly.
Zaitsev 10:41552d038a69 352 * Valid modes are @ref gpioModeInput and @ref gpioModeInputPull.
Zaitsev 10:41552d038a69 353 *
Zaitsev 10:41552d038a69 354 * @param[in] pinmask
Zaitsev 10:41552d038a69 355 * Bitmask containing the bitwise logic OR of which GPIO pin(s) to enable.
Zaitsev 10:41552d038a69 356 * Refer to Reference Manuals for pinmask to GPIO port/pin mapping.
Zaitsev 10:41552d038a69 357 * @param[in] polaritymask
Zaitsev 10:41552d038a69 358 * Bitmask containing the bitwise logic OR of GPIO pin(s) wake-up polarity.
Zaitsev 10:41552d038a69 359 * Refer to Reference Manuals for pinmask to GPIO port/pin mapping.
Zaitsev 10:41552d038a69 360 *****************************************************************************/
Zaitsev 10:41552d038a69 361 void GPIO_EM4EnablePinWakeup(uint32_t pinmask, uint32_t polaritymask)
Zaitsev 10:41552d038a69 362 {
Zaitsev 10:41552d038a69 363 EFM_ASSERT((pinmask & ~_GPIO_EM4WUEN_MASK) == 0);
Zaitsev 10:41552d038a69 364
Zaitsev 10:41552d038a69 365 #if defined( _GPIO_EM4WUPOL_MASK )
Zaitsev 10:41552d038a69 366 EFM_ASSERT((polaritymask & ~_GPIO_EM4WUPOL_MASK) == 0);
Zaitsev 10:41552d038a69 367 GPIO->EM4WUPOL &= ~pinmask; /* Set wakeup polarity */
Zaitsev 10:41552d038a69 368 GPIO->EM4WUPOL |= pinmask & polaritymask;
Zaitsev 10:41552d038a69 369 #elif defined( _GPIO_EXTILEVEL_MASK )
Zaitsev 10:41552d038a69 370 EFM_ASSERT((polaritymask & ~_GPIO_EXTILEVEL_MASK) == 0);
Zaitsev 10:41552d038a69 371 GPIO->EXTILEVEL &= ~pinmask;
Zaitsev 10:41552d038a69 372 GPIO->EXTILEVEL |= pinmask & polaritymask;
Zaitsev 10:41552d038a69 373 #endif
Zaitsev 10:41552d038a69 374 GPIO->EM4WUEN |= pinmask; /* Enable wakeup */
Zaitsev 10:41552d038a69 375
Zaitsev 10:41552d038a69 376 GPIO_EM4SetPinRetention(true); /* Enable pin retention */
Zaitsev 10:41552d038a69 377
Zaitsev 10:41552d038a69 378 #if defined( _GPIO_CMD_EM4WUCLR_MASK )
Zaitsev 10:41552d038a69 379 GPIO->CMD = GPIO_CMD_EM4WUCLR; /* Clear wake-up logic */
Zaitsev 10:41552d038a69 380 #elif defined( _GPIO_IFC_EM4WU_MASK )
Zaitsev 10:41552d038a69 381 GPIO_IntClear(pinmask);
Zaitsev 10:41552d038a69 382 #endif
Zaitsev 10:41552d038a69 383 }
Zaitsev 10:41552d038a69 384 #endif
Zaitsev 10:41552d038a69 385
Zaitsev 10:41552d038a69 386 /** @} (end addtogroup GPIO) */
Zaitsev 10:41552d038a69 387 /** @} (end addtogroup emlib) */
Zaitsev 10:41552d038a69 388
Zaitsev 10:41552d038a69 389 #endif /* defined(GPIO_COUNT) && (GPIO_COUNT > 0) */