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nRF51822_wallbot/nordic/nrf-sdk/nrf_gpio.h@0:8468a4403fea, 2016-10-11 (annotated)

Committer:
jksoft
Date:
Tue Oct 11 11:09:42 2016 +0000
Revision:
0:8468a4403fea
SB??ver;

Who changed what in which revision?

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jksoft 0:8468a4403fea 1 #ifndef NRF_GPIO_H__
jksoft 0:8468a4403fea 2 #define NRF_GPIO_H__
jksoft 0:8468a4403fea 3
jksoft 0:8468a4403fea 4 #include "nrf51.h"
jksoft 0:8468a4403fea 5 #include "nrf51_bitfields.h"
jksoft 0:8468a4403fea 6
jksoft 0:8468a4403fea 7 /**
jksoft 0:8468a4403fea 8 * @defgroup nrf_gpio GPIO abstraction
jksoft 0:8468a4403fea 9 * @{
jksoft 0:8468a4403fea 10 * @ingroup nrf_drivers
jksoft 0:8468a4403fea 11 * @brief GPIO pin abstraction and port abstraction for reading and writing byte-wise to GPIO ports.
jksoft 0:8468a4403fea 12 *
jksoft 0:8468a4403fea 13 * Here, the GPIO ports are defined as follows:
jksoft 0:8468a4403fea 14 * - Port 0 -> pin 0-7
jksoft 0:8468a4403fea 15 * - Port 1 -> pin 8-15
jksoft 0:8468a4403fea 16 * - Port 2 -> pin 16-23
jksoft 0:8468a4403fea 17 * - Port 3 -> pin 24-31
jksoft 0:8468a4403fea 18 */
jksoft 0:8468a4403fea 19
jksoft 0:8468a4403fea 20 /**
jksoft 0:8468a4403fea 21 * @enum nrf_gpio_port_dir_t
jksoft 0:8468a4403fea 22 * @brief Enumerator used for setting the direction of a GPIO port.
jksoft 0:8468a4403fea 23 */
jksoft 0:8468a4403fea 24 typedef enum
jksoft 0:8468a4403fea 25 {
jksoft 0:8468a4403fea 26 NRF_GPIO_PORT_DIR_OUTPUT, ///< Output
jksoft 0:8468a4403fea 27 NRF_GPIO_PORT_DIR_INPUT ///< Input
jksoft 0:8468a4403fea 28 } nrf_gpio_port_dir_t;
jksoft 0:8468a4403fea 29
jksoft 0:8468a4403fea 30 /**
jksoft 0:8468a4403fea 31 * @enum nrf_gpio_pin_dir_t
jksoft 0:8468a4403fea 32 * Pin direction definitions.
jksoft 0:8468a4403fea 33 */
jksoft 0:8468a4403fea 34 typedef enum
jksoft 0:8468a4403fea 35 {
jksoft 0:8468a4403fea 36 NRF_GPIO_PIN_DIR_INPUT, ///< Input
jksoft 0:8468a4403fea 37 NRF_GPIO_PIN_DIR_OUTPUT ///< Output
jksoft 0:8468a4403fea 38 } nrf_gpio_pin_dir_t;
jksoft 0:8468a4403fea 39
jksoft 0:8468a4403fea 40 /**
jksoft 0:8468a4403fea 41 * @enum nrf_gpio_port_select_t
jksoft 0:8468a4403fea 42 * @brief Enumerator used for selecting between port 0 - 3.
jksoft 0:8468a4403fea 43 */
jksoft 0:8468a4403fea 44 typedef enum
jksoft 0:8468a4403fea 45 {
jksoft 0:8468a4403fea 46 NRF_GPIO_PORT_SELECT_PORT0 = 0, ///< Port 0 (GPIO pin 0-7)
jksoft 0:8468a4403fea 47 NRF_GPIO_PORT_SELECT_PORT1, ///< Port 1 (GPIO pin 8-15)
jksoft 0:8468a4403fea 48 NRF_GPIO_PORT_SELECT_PORT2, ///< Port 2 (GPIO pin 16-23)
jksoft 0:8468a4403fea 49 NRF_GPIO_PORT_SELECT_PORT3, ///< Port 3 (GPIO pin 24-31)
jksoft 0:8468a4403fea 50 } nrf_gpio_port_select_t;
jksoft 0:8468a4403fea 51
jksoft 0:8468a4403fea 52 /**
jksoft 0:8468a4403fea 53 * @enum nrf_gpio_pin_pull_t
jksoft 0:8468a4403fea 54 * @brief Enumerator used for selecting the pin to be pulled down or up at the time of pin configuration
jksoft 0:8468a4403fea 55 */
jksoft 0:8468a4403fea 56 typedef enum
jksoft 0:8468a4403fea 57 {
jksoft 0:8468a4403fea 58 NRF_GPIO_PIN_NOPULL = GPIO_PIN_CNF_PULL_Disabled, ///< Pin pullup resistor disabled
jksoft 0:8468a4403fea 59 NRF_GPIO_PIN_PULLDOWN = GPIO_PIN_CNF_PULL_Pulldown, ///< Pin pulldown resistor enabled
jksoft 0:8468a4403fea 60 NRF_GPIO_PIN_PULLUP = GPIO_PIN_CNF_PULL_Pullup, ///< Pin pullup resistor enabled
jksoft 0:8468a4403fea 61 } nrf_gpio_pin_pull_t;
jksoft 0:8468a4403fea 62
jksoft 0:8468a4403fea 63 /**
jksoft 0:8468a4403fea 64 * @enum nrf_gpio_pin_sense_t
jksoft 0:8468a4403fea 65 * @brief Enumerator used for selecting the pin to sense high or low level on the pin input.
jksoft 0:8468a4403fea 66 */
jksoft 0:8468a4403fea 67 typedef enum
jksoft 0:8468a4403fea 68 {
jksoft 0:8468a4403fea 69 NRF_GPIO_PIN_NOSENSE = GPIO_PIN_CNF_SENSE_Disabled, ///< Pin sense level disabled.
jksoft 0:8468a4403fea 70 NRF_GPIO_PIN_SENSE_LOW = GPIO_PIN_CNF_SENSE_Low, ///< Pin sense low level.
jksoft 0:8468a4403fea 71 NRF_GPIO_PIN_SENSE_HIGH = GPIO_PIN_CNF_SENSE_High, ///< Pin sense high level.
jksoft 0:8468a4403fea 72 } nrf_gpio_pin_sense_t;
jksoft 0:8468a4403fea 73
jksoft 0:8468a4403fea 74 /**
jksoft 0:8468a4403fea 75 * @brief Function for configuring the GPIO pin range as outputs with normal drive strength.
jksoft 0:8468a4403fea 76 * This function can be used to configure pin range as simple output with gate driving GPIO_PIN_CNF_DRIVE_S0S1 (normal cases).
jksoft 0:8468a4403fea 77 *
jksoft 0:8468a4403fea 78 * @param pin_range_start specifies the start number (inclusive) in the range of pin numbers to be configured (allowed values 0-30)
jksoft 0:8468a4403fea 79 *
jksoft 0:8468a4403fea 80 * @param pin_range_end specifies the end number (inclusive) in the range of pin numbers to be configured (allowed values 0-30)
jksoft 0:8468a4403fea 81 *
jksoft 0:8468a4403fea 82 * @note For configuring only one pin as output use @ref nrf_gpio_cfg_output
jksoft 0:8468a4403fea 83 * Sense capability on the pin is disabled, and input is disconnected from the buffer as the pins are configured as output.
jksoft 0:8468a4403fea 84 */
jksoft 0:8468a4403fea 85 static __INLINE void nrf_gpio_range_cfg_output(uint32_t pin_range_start, uint32_t pin_range_end)
jksoft 0:8468a4403fea 86 {
jksoft 0:8468a4403fea 87 /*lint -e{845} // A zero has been given as right argument to operator '|'" */
jksoft 0:8468a4403fea 88 for (; pin_range_start <= pin_range_end; pin_range_start++)
jksoft 0:8468a4403fea 89 {
jksoft 0:8468a4403fea 90 NRF_GPIO->PIN_CNF[pin_range_start] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
jksoft 0:8468a4403fea 91 | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
jksoft 0:8468a4403fea 92 | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
jksoft 0:8468a4403fea 93 | (GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos)
jksoft 0:8468a4403fea 94 | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
jksoft 0:8468a4403fea 95 }
jksoft 0:8468a4403fea 96 }
jksoft 0:8468a4403fea 97
jksoft 0:8468a4403fea 98 /**
jksoft 0:8468a4403fea 99 * @brief Function for configuring the GPIO pin range as inputs with given initial value set, hiding inner details.
jksoft 0:8468a4403fea 100 * This function can be used to configure pin range as simple input.
jksoft 0:8468a4403fea 101 *
jksoft 0:8468a4403fea 102 * @param pin_range_start specifies the start number (inclusive) in the range of pin numbers to be configured (allowed values 0-30)
jksoft 0:8468a4403fea 103 *
jksoft 0:8468a4403fea 104 * @param pin_range_end specifies the end number (inclusive) in the range of pin numbers to be configured (allowed values 0-30)
jksoft 0:8468a4403fea 105 *
jksoft 0:8468a4403fea 106 * @param pull_config State of the pin range pull resistor (no pull, pulled down or pulled high)
jksoft 0:8468a4403fea 107 *
jksoft 0:8468a4403fea 108 * @note For configuring only one pin as input use @ref nrf_gpio_cfg_input
jksoft 0:8468a4403fea 109 * Sense capability on the pin is disabled, and input is connected to buffer so that the GPIO->IN register is readable
jksoft 0:8468a4403fea 110 */
jksoft 0:8468a4403fea 111 static __INLINE void nrf_gpio_range_cfg_input(uint32_t pin_range_start, uint32_t pin_range_end, nrf_gpio_pin_pull_t pull_config)
jksoft 0:8468a4403fea 112 {
jksoft 0:8468a4403fea 113 /*lint -e{845} // A zero has been given as right argument to operator '|'" */
jksoft 0:8468a4403fea 114 for (; pin_range_start <= pin_range_end; pin_range_start++)
jksoft 0:8468a4403fea 115 {
jksoft 0:8468a4403fea 116 NRF_GPIO->PIN_CNF[pin_range_start] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
jksoft 0:8468a4403fea 117 | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
jksoft 0:8468a4403fea 118 | (pull_config << GPIO_PIN_CNF_PULL_Pos)
jksoft 0:8468a4403fea 119 | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
jksoft 0:8468a4403fea 120 | (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
jksoft 0:8468a4403fea 121 }
jksoft 0:8468a4403fea 122 }
jksoft 0:8468a4403fea 123
jksoft 0:8468a4403fea 124 /**
jksoft 0:8468a4403fea 125 * @brief Function for configuring the given GPIO pin number as output with given initial value set, hiding inner details.
jksoft 0:8468a4403fea 126 * This function can be used to configure pin range as simple input with gate driving GPIO_PIN_CNF_DRIVE_S0S1 (normal cases).
jksoft 0:8468a4403fea 127 *
jksoft 0:8468a4403fea 128 * @param pin_number specifies the pin number of gpio pin numbers to be configured (allowed values 0-30)
jksoft 0:8468a4403fea 129 *
jksoft 0:8468a4403fea 130 * @note Sense capability on the pin is disabled, and input is disconnected from the buffer as the pins are configured as output.
jksoft 0:8468a4403fea 131 */
jksoft 0:8468a4403fea 132 static __INLINE void nrf_gpio_cfg_output(uint32_t pin_number)
jksoft 0:8468a4403fea 133 {
jksoft 0:8468a4403fea 134 /*lint -e{845} // A zero has been given as right argument to operator '|'" */
jksoft 0:8468a4403fea 135 NRF_GPIO->PIN_CNF[pin_number] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
jksoft 0:8468a4403fea 136 | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
jksoft 0:8468a4403fea 137 | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
jksoft 0:8468a4403fea 138 | (GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos)
jksoft 0:8468a4403fea 139 | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
jksoft 0:8468a4403fea 140 }
jksoft 0:8468a4403fea 141
jksoft 0:8468a4403fea 142 /**
jksoft 0:8468a4403fea 143 * @brief Function for configuring the given GPIO pin number as input with given initial value set, hiding inner details.
jksoft 0:8468a4403fea 144 * This function can be used to configure pin range as simple input with gate driving GPIO_PIN_CNF_DRIVE_S0S1 (normal cases).
jksoft 0:8468a4403fea 145 *
jksoft 0:8468a4403fea 146 * @param pin_number specifies the pin number of gpio pin numbers to be configured (allowed values 0-30)
jksoft 0:8468a4403fea 147 *
jksoft 0:8468a4403fea 148 * @param pull_config State of the pin range pull resistor (no pull, pulled down or pulled high)
jksoft 0:8468a4403fea 149 *
jksoft 0:8468a4403fea 150 * @note Sense capability on the pin is disabled, and input is connected to buffer so that the GPIO->IN register is readable
jksoft 0:8468a4403fea 151 */
jksoft 0:8468a4403fea 152 static __INLINE void nrf_gpio_cfg_input(uint32_t pin_number, nrf_gpio_pin_pull_t pull_config)
jksoft 0:8468a4403fea 153 {
jksoft 0:8468a4403fea 154 /*lint -e{845} // A zero has been given as right argument to operator '|'" */
jksoft 0:8468a4403fea 155 NRF_GPIO->PIN_CNF[pin_number] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
jksoft 0:8468a4403fea 156 | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
jksoft 0:8468a4403fea 157 | (pull_config << GPIO_PIN_CNF_PULL_Pos)
jksoft 0:8468a4403fea 158 | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
jksoft 0:8468a4403fea 159 | (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
jksoft 0:8468a4403fea 160 }
jksoft 0:8468a4403fea 161
jksoft 0:8468a4403fea 162 /**
jksoft 0:8468a4403fea 163 * @brief Function for configuring the given GPIO pin number as input with given initial value set, hiding inner details.
jksoft 0:8468a4403fea 164 * This function can be used to configure pin range as simple input with gate driving GPIO_PIN_CNF_DRIVE_S0S1 (normal cases).
jksoft 0:8468a4403fea 165 * Sense capability on the pin is configurable, and input is connected to buffer so that the GPIO->IN register is readable.
jksoft 0:8468a4403fea 166 *
jksoft 0:8468a4403fea 167 * @param pin_number specifies the pin number of gpio pin numbers to be configured (allowed values 0-30).
jksoft 0:8468a4403fea 168 *
jksoft 0:8468a4403fea 169 * @param pull_config state of the pin pull resistor (no pull, pulled down or pulled high).
jksoft 0:8468a4403fea 170 *
jksoft 0:8468a4403fea 171 * @param sense_config sense level of the pin (no sense, sense low or sense high).
jksoft 0:8468a4403fea 172 */
jksoft 0:8468a4403fea 173 static __INLINE void nrf_gpio_cfg_sense_input(uint32_t pin_number, nrf_gpio_pin_pull_t pull_config, nrf_gpio_pin_sense_t sense_config)
jksoft 0:8468a4403fea 174 {
jksoft 0:8468a4403fea 175 /*lint -e{845} // A zero has been given as right argument to operator '|'" */
jksoft 0:8468a4403fea 176 NRF_GPIO->PIN_CNF[pin_number] = (sense_config << GPIO_PIN_CNF_SENSE_Pos)
jksoft 0:8468a4403fea 177 | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
jksoft 0:8468a4403fea 178 | (pull_config << GPIO_PIN_CNF_PULL_Pos)
jksoft 0:8468a4403fea 179 | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
jksoft 0:8468a4403fea 180 | (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
jksoft 0:8468a4403fea 181 }
jksoft 0:8468a4403fea 182
jksoft 0:8468a4403fea 183 /**
jksoft 0:8468a4403fea 184 * @brief Function for setting the direction for a GPIO pin.
jksoft 0:8468a4403fea 185 *
jksoft 0:8468a4403fea 186 * @param pin_number specifies the pin number [0:31] for which to
jksoft 0:8468a4403fea 187 * set the direction.
jksoft 0:8468a4403fea 188 *
jksoft 0:8468a4403fea 189 * @param direction specifies the direction
jksoft 0:8468a4403fea 190 */
jksoft 0:8468a4403fea 191 static __INLINE void nrf_gpio_pin_dir_set(uint32_t pin_number, nrf_gpio_pin_dir_t direction)
jksoft 0:8468a4403fea 192 {
jksoft 0:8468a4403fea 193 if(direction == NRF_GPIO_PIN_DIR_INPUT)
jksoft 0:8468a4403fea 194 {
jksoft 0:8468a4403fea 195 NRF_GPIO->PIN_CNF[pin_number] =
jksoft 0:8468a4403fea 196 (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
jksoft 0:8468a4403fea 197 | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
jksoft 0:8468a4403fea 198 | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
jksoft 0:8468a4403fea 199 | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
jksoft 0:8468a4403fea 200 | (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
jksoft 0:8468a4403fea 201 }
jksoft 0:8468a4403fea 202 else
jksoft 0:8468a4403fea 203 {
jksoft 0:8468a4403fea 204 NRF_GPIO->DIRSET = (1UL << pin_number);
jksoft 0:8468a4403fea 205 }
jksoft 0:8468a4403fea 206 }
jksoft 0:8468a4403fea 207
jksoft 0:8468a4403fea 208 /**
jksoft 0:8468a4403fea 209 * @brief Function for setting a GPIO pin.
jksoft 0:8468a4403fea 210 *
jksoft 0:8468a4403fea 211 * Note that the pin must be configured as an output for this
jksoft 0:8468a4403fea 212 * function to have any effect.
jksoft 0:8468a4403fea 213 *
jksoft 0:8468a4403fea 214 * @param pin_number specifies the pin number [0:31] to
jksoft 0:8468a4403fea 215 * set.
jksoft 0:8468a4403fea 216 */
jksoft 0:8468a4403fea 217 static __INLINE void nrf_gpio_pin_set(uint32_t pin_number)
jksoft 0:8468a4403fea 218 {
jksoft 0:8468a4403fea 219 NRF_GPIO->OUTSET = (1UL << pin_number);
jksoft 0:8468a4403fea 220 }
jksoft 0:8468a4403fea 221
jksoft 0:8468a4403fea 222 /**
jksoft 0:8468a4403fea 223 * @brief Function for clearing a GPIO pin.
jksoft 0:8468a4403fea 224 *
jksoft 0:8468a4403fea 225 * Note that the pin must be configured as an output for this
jksoft 0:8468a4403fea 226 * function to have any effect.
jksoft 0:8468a4403fea 227 *
jksoft 0:8468a4403fea 228 * @param pin_number specifies the pin number [0:31] to
jksoft 0:8468a4403fea 229 * clear.
jksoft 0:8468a4403fea 230 */
jksoft 0:8468a4403fea 231 static __INLINE void nrf_gpio_pin_clear(uint32_t pin_number)
jksoft 0:8468a4403fea 232 {
jksoft 0:8468a4403fea 233 NRF_GPIO->OUTCLR = (1UL << pin_number);
jksoft 0:8468a4403fea 234 }
jksoft 0:8468a4403fea 235
jksoft 0:8468a4403fea 236 /**
jksoft 0:8468a4403fea 237 * @brief Function for toggling a GPIO pin.
jksoft 0:8468a4403fea 238 *
jksoft 0:8468a4403fea 239 * Note that the pin must be configured as an output for this
jksoft 0:8468a4403fea 240 * function to have any effect.
jksoft 0:8468a4403fea 241 *
jksoft 0:8468a4403fea 242 * @param pin_number specifies the pin number [0:31] to
jksoft 0:8468a4403fea 243 * toggle.
jksoft 0:8468a4403fea 244 */
jksoft 0:8468a4403fea 245 static __INLINE void nrf_gpio_pin_toggle(uint32_t pin_number)
jksoft 0:8468a4403fea 246 {
jksoft 0:8468a4403fea 247 const uint32_t pin_bit = 1UL << pin_number;
jksoft 0:8468a4403fea 248 const uint32_t pin_state = ((NRF_GPIO->OUT >> pin_number) & 1UL);
jksoft 0:8468a4403fea 249
jksoft 0:8468a4403fea 250 if (pin_state == 0)
jksoft 0:8468a4403fea 251 {
jksoft 0:8468a4403fea 252 // Current state low, set high.
jksoft 0:8468a4403fea 253 NRF_GPIO->OUTSET = pin_bit;
jksoft 0:8468a4403fea 254 }
jksoft 0:8468a4403fea 255 else
jksoft 0:8468a4403fea 256 {
jksoft 0:8468a4403fea 257 // Current state high, set low.
jksoft 0:8468a4403fea 258 NRF_GPIO->OUTCLR = pin_bit;
jksoft 0:8468a4403fea 259 }
jksoft 0:8468a4403fea 260 }
jksoft 0:8468a4403fea 261
jksoft 0:8468a4403fea 262 /**
jksoft 0:8468a4403fea 263 * @brief Function for writing a value to a GPIO pin.
jksoft 0:8468a4403fea 264 *
jksoft 0:8468a4403fea 265 * Note that the pin must be configured as an output for this
jksoft 0:8468a4403fea 266 * function to have any effect.
jksoft 0:8468a4403fea 267 *
jksoft 0:8468a4403fea 268 * @param pin_number specifies the pin number [0:31] to
jksoft 0:8468a4403fea 269 * write.
jksoft 0:8468a4403fea 270 *
jksoft 0:8468a4403fea 271 * @param value specifies the value to be written to the pin.
jksoft 0:8468a4403fea 272 * @arg 0 clears the pin
jksoft 0:8468a4403fea 273 * @arg >=1 sets the pin.
jksoft 0:8468a4403fea 274 */
jksoft 0:8468a4403fea 275 static __INLINE void nrf_gpio_pin_write(uint32_t pin_number, uint32_t value)
jksoft 0:8468a4403fea 276 {
jksoft 0:8468a4403fea 277 if (value == 0)
jksoft 0:8468a4403fea 278 {
jksoft 0:8468a4403fea 279 nrf_gpio_pin_clear(pin_number);
jksoft 0:8468a4403fea 280 }
jksoft 0:8468a4403fea 281 else
jksoft 0:8468a4403fea 282 {
jksoft 0:8468a4403fea 283 nrf_gpio_pin_set(pin_number);
jksoft 0:8468a4403fea 284 }
jksoft 0:8468a4403fea 285 }
jksoft 0:8468a4403fea 286
jksoft 0:8468a4403fea 287 /**
jksoft 0:8468a4403fea 288 * @brief Function for reading the input level of a GPIO pin.
jksoft 0:8468a4403fea 289 *
jksoft 0:8468a4403fea 290 * Note that the pin must have input connected for the value
jksoft 0:8468a4403fea 291 * returned from this function to be valid.
jksoft 0:8468a4403fea 292 *
jksoft 0:8468a4403fea 293 * @param pin_number specifies the pin number [0:31] to
jksoft 0:8468a4403fea 294 * read.
jksoft 0:8468a4403fea 295 *
jksoft 0:8468a4403fea 296 * @return
jksoft 0:8468a4403fea 297 * @retval 0 if the pin input level is low.
jksoft 0:8468a4403fea 298 * @retval 1 if the pin input level is high.
jksoft 0:8468a4403fea 299 * @retval > 1 should never occur.
jksoft 0:8468a4403fea 300 */
jksoft 0:8468a4403fea 301 static __INLINE uint32_t nrf_gpio_pin_read(uint32_t pin_number)
jksoft 0:8468a4403fea 302 {
jksoft 0:8468a4403fea 303 return ((NRF_GPIO->IN >> pin_number) & 1UL);
jksoft 0:8468a4403fea 304 }
jksoft 0:8468a4403fea 305
jksoft 0:8468a4403fea 306 /**
jksoft 0:8468a4403fea 307 * @brief Generic function for writing a single byte of a 32 bit word at a given
jksoft 0:8468a4403fea 308 * address.
jksoft 0:8468a4403fea 309 *
jksoft 0:8468a4403fea 310 * This function should not be called from outside the nrf_gpio
jksoft 0:8468a4403fea 311 * abstraction layer.
jksoft 0:8468a4403fea 312 *
jksoft 0:8468a4403fea 313 * @param word_address is the address of the word to be written.
jksoft 0:8468a4403fea 314 *
jksoft 0:8468a4403fea 315 * @param byte_no is the the word byte number (0-3) to be written.
jksoft 0:8468a4403fea 316 *
jksoft 0:8468a4403fea 317 * @param value is the value to be written to byte "byte_no" of word
jksoft 0:8468a4403fea 318 * at address "word_address"
jksoft 0:8468a4403fea 319 */
jksoft 0:8468a4403fea 320 static __INLINE void nrf_gpio_word_byte_write(volatile uint32_t * word_address, uint8_t byte_no, uint8_t value)
jksoft 0:8468a4403fea 321 {
jksoft 0:8468a4403fea 322 *((volatile uint8_t*)(word_address) + byte_no) = value;
jksoft 0:8468a4403fea 323 }
jksoft 0:8468a4403fea 324
jksoft 0:8468a4403fea 325 /**
jksoft 0:8468a4403fea 326 * @brief Generic function for reading a single byte of a 32 bit word at a given
jksoft 0:8468a4403fea 327 * address.
jksoft 0:8468a4403fea 328 *
jksoft 0:8468a4403fea 329 * This function should not be called from outside the nrf_gpio
jksoft 0:8468a4403fea 330 * abstraction layer.
jksoft 0:8468a4403fea 331 *
jksoft 0:8468a4403fea 332 * @param word_address is the address of the word to be read.
jksoft 0:8468a4403fea 333 *
jksoft 0:8468a4403fea 334 * @param byte_no is the the byte number (0-3) of the word to be read.
jksoft 0:8468a4403fea 335 *
jksoft 0:8468a4403fea 336 * @return byte "byte_no" of word at address "word_address".
jksoft 0:8468a4403fea 337 */
jksoft 0:8468a4403fea 338 static __INLINE uint8_t nrf_gpio_word_byte_read(const volatile uint32_t* word_address, uint8_t byte_no)
jksoft 0:8468a4403fea 339 {
jksoft 0:8468a4403fea 340 return (*((const volatile uint8_t*)(word_address) + byte_no));
jksoft 0:8468a4403fea 341 }
jksoft 0:8468a4403fea 342
jksoft 0:8468a4403fea 343 /**
jksoft 0:8468a4403fea 344 * @brief Function for setting the direction of a port.
jksoft 0:8468a4403fea 345 *
jksoft 0:8468a4403fea 346 * @param port is the port for which to set the direction.
jksoft 0:8468a4403fea 347 *
jksoft 0:8468a4403fea 348 * @param dir direction to be set for this port.
jksoft 0:8468a4403fea 349 */
jksoft 0:8468a4403fea 350 static __INLINE void nrf_gpio_port_dir_set(nrf_gpio_port_select_t port, nrf_gpio_port_dir_t dir)
jksoft 0:8468a4403fea 351 {
jksoft 0:8468a4403fea 352 if (dir == NRF_GPIO_PORT_DIR_OUTPUT)
jksoft 0:8468a4403fea 353 {
jksoft 0:8468a4403fea 354 nrf_gpio_word_byte_write(&NRF_GPIO->DIRSET, port, 0xFF);
jksoft 0:8468a4403fea 355 }
jksoft 0:8468a4403fea 356 else
jksoft 0:8468a4403fea 357 {
jksoft 0:8468a4403fea 358 nrf_gpio_range_cfg_input(port*8, (port+1)*8-1, NRF_GPIO_PIN_NOPULL);
jksoft 0:8468a4403fea 359 }
jksoft 0:8468a4403fea 360 }
jksoft 0:8468a4403fea 361
jksoft 0:8468a4403fea 362 /**
jksoft 0:8468a4403fea 363 * @brief Function for reading a GPIO port.
jksoft 0:8468a4403fea 364 *
jksoft 0:8468a4403fea 365 * @param port is the port to read.
jksoft 0:8468a4403fea 366 *
jksoft 0:8468a4403fea 367 * @return the input value on this port.
jksoft 0:8468a4403fea 368 */
jksoft 0:8468a4403fea 369 static __INLINE uint8_t nrf_gpio_port_read(nrf_gpio_port_select_t port)
jksoft 0:8468a4403fea 370 {
jksoft 0:8468a4403fea 371 return nrf_gpio_word_byte_read(&NRF_GPIO->IN, port);
jksoft 0:8468a4403fea 372 }
jksoft 0:8468a4403fea 373
jksoft 0:8468a4403fea 374 /**
jksoft 0:8468a4403fea 375 * @brief Function for writing to a GPIO port.
jksoft 0:8468a4403fea 376 *
jksoft 0:8468a4403fea 377 * @param port is the port to write.
jksoft 0:8468a4403fea 378 *
jksoft 0:8468a4403fea 379 * @param value is the value to write to this port.
jksoft 0:8468a4403fea 380 *
jksoft 0:8468a4403fea 381 * @sa nrf_gpio_port_dir_set()
jksoft 0:8468a4403fea 382 */
jksoft 0:8468a4403fea 383 static __INLINE void nrf_gpio_port_write(nrf_gpio_port_select_t port, uint8_t value)
jksoft 0:8468a4403fea 384 {
jksoft 0:8468a4403fea 385 nrf_gpio_word_byte_write(&NRF_GPIO->OUT, port, value);
jksoft 0:8468a4403fea 386 }
jksoft 0:8468a4403fea 387
jksoft 0:8468a4403fea 388 /**
jksoft 0:8468a4403fea 389 * @brief Function for setting individual pins on GPIO port.
jksoft 0:8468a4403fea 390 *
jksoft 0:8468a4403fea 391 * @param port is the port for which to set the pins.
jksoft 0:8468a4403fea 392 *
jksoft 0:8468a4403fea 393 * @param set_mask is a mask specifying which pins to set. A bit
jksoft 0:8468a4403fea 394 * set to 1 indicates that the corresponding port pin shall be
jksoft 0:8468a4403fea 395 * set.
jksoft 0:8468a4403fea 396 *
jksoft 0:8468a4403fea 397 * @sa nrf_gpio_port_dir_set()
jksoft 0:8468a4403fea 398 */
jksoft 0:8468a4403fea 399 static __INLINE void nrf_gpio_port_set(nrf_gpio_port_select_t port, uint8_t set_mask)
jksoft 0:8468a4403fea 400 {
jksoft 0:8468a4403fea 401 nrf_gpio_word_byte_write(&NRF_GPIO->OUTSET, port, set_mask);
jksoft 0:8468a4403fea 402 }
jksoft 0:8468a4403fea 403
jksoft 0:8468a4403fea 404 /**
jksoft 0:8468a4403fea 405 * @brief Function for clearing individual pins on GPIO port.
jksoft 0:8468a4403fea 406 *
jksoft 0:8468a4403fea 407 * @param port is the port for which to clear the pins.
jksoft 0:8468a4403fea 408 *
jksoft 0:8468a4403fea 409 * @param clr_mask is a mask specifying which pins to clear. A bit
jksoft 0:8468a4403fea 410 * set to 1 indicates that the corresponding port pin shall be
jksoft 0:8468a4403fea 411 * cleared.
jksoft 0:8468a4403fea 412 *
jksoft 0:8468a4403fea 413 * @sa nrf_gpio_port_dir_set()
jksoft 0:8468a4403fea 414 */
jksoft 0:8468a4403fea 415 static __INLINE void nrf_gpio_port_clear(nrf_gpio_port_select_t port, uint8_t clr_mask)
jksoft 0:8468a4403fea 416 {
jksoft 0:8468a4403fea 417 nrf_gpio_word_byte_write(&NRF_GPIO->OUTCLR, port, clr_mask);
jksoft 0:8468a4403fea 418 }
jksoft 0:8468a4403fea 419
jksoft 0:8468a4403fea 420 /** @} */
jksoft 0:8468a4403fea 421
jksoft 0:8468a4403fea 422 #endif