/ * @brief * Configure GPIO interrupt. * * @details * If reconfiguring a GPIO interrupt that is already enabled, it is generally * recommended to disable it first, see GPIO_Disable(). * * The actual GPIO interrupt handler must be in place before enabling the * interrupt. * * Notice that any pending interrupt for the selected pin is cleared by this * function. * * @note
| 143 | * false to leave disabled. See GPIO_IntDisable() and GPIO_IntEnable(). |
| 144 | ******************************************************************************/ |
| 145 | void GPIO_IntConfig(GPIO_Port_TypeDef port, |
| 146 | unsigned int pin, |
| 147 | bool risingEdge, |
| 148 | bool fallingEdge, |
| 149 | bool enable) |
| 150 | { |
| 151 | uint32_t tmp; |
| 152 | |
| 153 | EFM_ASSERT(GPIO_PORT_VALID(port) && GPIO_PIN_VALID(pin)); |
| 154 | |
| 155 | /* There are two registers controlling the interrupt configuration: |
| 156 | * The EXTIPSELL register controls pins 0-7 and EXTIPSELH controls |
| 157 | * pins 8-15. */ |
| 158 | if (pin < 8) |
| 159 | { |
| 160 | GPIO->EXTIPSELL = (GPIO->EXTIPSELL & ~(0xF << (4 * pin))) | |
| 161 | (port << (4 * pin)); |
| 162 | } |
| 163 | else |
| 164 | { |
| 165 | tmp = pin - 8; |
| 166 | GPIO->EXTIPSELH = (GPIO->EXTIPSELH & ~(0xF << (4 * tmp))) | |
| 167 | (port << (4 * tmp)); |
| 168 | } |
| 169 | |
| 170 | /* Enable/disable rising edge */ |
| 171 | BITBAND_Peripheral(&(GPIO->EXTIRISE), pin, (unsigned int)risingEdge); |
| 172 | |
| 173 | /* Enable/disable falling edge */ |
| 174 | BITBAND_Peripheral(&(GPIO->EXTIFALL), pin, (unsigned int)fallingEdge); |
| 175 | |
| 176 | /* Clear any pending interrupt */ |
| 177 | GPIO->IFC = 1 << pin; |
| 178 | |
| 179 | /* Finally enable/disable interrupt */ |
| 180 | BITBAND_Peripheral(&(GPIO->IEN), pin, (unsigned int)enable); |
| 181 | } |
| 182 | |
| 183 | |
| 184 | /***************************************************************************//** |
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