diff options
author | Clyne Sullivan <clyne@bitgloo.com> | 2025-01-29 21:34:25 -0500 |
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committer | Clyne Sullivan <clyne@bitgloo.com> | 2025-01-29 21:34:25 -0500 |
commit | 5b81bc8ccbd342b8566d88fc9f17a73aec03b5b6 (patch) | |
tree | cc57486912cfa74c6440d8b97c28f451ec787d78 /Drivers/STM32U0xx_HAL_Driver/Src/stm32u0xx_hal_gpio.c |
initial commit
Diffstat (limited to 'Drivers/STM32U0xx_HAL_Driver/Src/stm32u0xx_hal_gpio.c')
-rw-r--r-- | Drivers/STM32U0xx_HAL_Driver/Src/stm32u0xx_hal_gpio.c | 542 |
1 files changed, 542 insertions, 0 deletions
diff --git a/Drivers/STM32U0xx_HAL_Driver/Src/stm32u0xx_hal_gpio.c b/Drivers/STM32U0xx_HAL_Driver/Src/stm32u0xx_hal_gpio.c new file mode 100644 index 0000000..c6455e4 --- /dev/null +++ b/Drivers/STM32U0xx_HAL_Driver/Src/stm32u0xx_hal_gpio.c @@ -0,0 +1,542 @@ +/** + ****************************************************************************** + * @file stm32u0xx_hal_gpio.c + * @author MCD Application Team + * @brief GPIO HAL module driver. + * This file provides firmware functions to manage the following + * functionalities of the General Purpose Input/Output (GPIO) peripheral: + * + Initialization and de-initialization functions + * + IO operation functions + * + ****************************************************************************** + * @attention + * + * Copyright (c) 2023 STMicroelectronics. + * All rights reserved. + * + * This software is licensed under terms that can be found in the LICENSE file + * in the root directory of this software component. + * If no LICENSE file comes with this software, it is provided AS-IS. + * + ****************************************************************************** + @verbatim + ============================================================================== + ##### GPIO Peripheral features ##### + ============================================================================== + [..] + (+) Each port bit of the general-purpose I/O (GPIO) ports can be individually + configured by software in several modes: + (++) Input mode + (++) Analog mode + (++) Output mode + (++) Alternate function mode + (++) External interrupt/event lines + + (+) During and just after reset, the alternate functions and external interrupt + lines are not active and the I/O ports are configured in input floating mode. + + (+) All GPIO pins have weak internal pull-up and pull-down resistors, which can be + activated or not. + + (+) In Output or Alternate mode, each IO can be configured on open-drain or push-pull + type and the IO speed can be selected depending on the VDD value. + + (+) The microcontroller IO pins are connected to onboard peripherals/modules through a + multiplexer that allows only one peripheral alternate function (AF) connected + to an IO pin at a time. In this way, there can be no conflict between peripherals + sharing the same IO pin. + + (+) All ports have external interrupt/event capability. To use external interrupt + lines, the port must be configured in input mode. All available GPIO pins are + connected to the 16 external interrupt/event lines from EXTI0 to EXTI15. + + (+) The external interrupt/event controller consists of up to 28 edge detectors + (16 lines are connected to GPIO) for generating event/interrupt requests (each + input line can be independently configured to select the type (interrupt or event) + and the corresponding trigger event (rising or falling or both). Each line can + also be masked independently. + + ##### How to use this driver ##### + ============================================================================== + [..] + (#) Enable the GPIO AHB clock using the following function: __HAL_RCC_GPIOx_CLK_ENABLE(). + + (#) Configure the GPIO pin(s) using HAL_GPIO_Init(). + (++) Configure the IO mode using "Mode" member from GPIO_InitTypeDef structure + (++) Activate Pull-up, Pull-down resistor using "Pull" member from GPIO_InitTypeDef + structure. + (++) In case of Output or alternate function mode selection: the speed is + configured through "Speed" member from GPIO_InitTypeDef structure. + (++) In alternate mode is selection, the alternate function connected to the IO + is configured through "Alternate" member from GPIO_InitTypeDef structure. + (++) Analog mode is required when a pin is to be used as ADC channel + or DAC output. + (++) In case of external interrupt/event selection the "Mode" member from + GPIO_InitTypeDef structure select the type (interrupt or event) and + the corresponding trigger event (rising or falling or both). + + (#) In case of external interrupt/event mode selection, configure NVIC IRQ priority + mapped to the EXTI line using HAL_NVIC_SetPriority() and enable it using + HAL_NVIC_EnableIRQ(). + + (#) To get the level of a pin configured in input mode use HAL_GPIO_ReadPin(). + + (#) To set/reset the level of a pin configured in output mode use + HAL_GPIO_WritePin()/HAL_GPIO_TogglePin(). + + (#) To lock pin configuration until next reset use HAL_GPIO_LockPin(). + + (#) During and just after reset, the alternate functions are not + active and the GPIO pins are configured in input floating mode (except JTAG + pins). + + (#) The LSE oscillator pins OSC32_IN and OSC32_OUT can be used as general purpose + (PC14 and PC15, respectively) when the LSE oscillator is off. The LSE has + priority over the GPIO function. + + (#) The HSE oscillator pins OSC_IN/OSC_OUT can be used as + general purpose PF0 and PF1, respectively, when the HSE oscillator is off. + The HSE has priority over the GPIO function. + + @endverbatim + ****************************************************************************** + */ + +/* Includes ------------------------------------------------------------------*/ +#include "stm32u0xx_hal.h" + +/** @addtogroup STM32U0xx_HAL_Driver + * @{ + */ + +/** @addtogroup GPIO + * @{ + */ + +#ifdef HAL_GPIO_MODULE_ENABLED + +/* Private typedef -----------------------------------------------------------*/ +/* Private defines ------------------------------------------------------------*/ +/** @addtogroup GPIO_Private_Constants + * @{ + */ +#define GPIO_NUMBER (16u) +/** + * @} + */ + +/* Private macros ------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ +/* Private function prototypes -----------------------------------------------*/ +/* Exported functions --------------------------------------------------------*/ + +/** @addtogroup GPIO_Exported_Functions + * @{ + */ + +/** @addtogroup GPIO_Exported_Functions_Group1 + * @brief Initialization and Configuration functions + * +@verbatim + =============================================================================== + ##### Initialization and de-initialization functions ##### + =============================================================================== + +@endverbatim + * @{ + */ + +/** + * @brief Initialize the GPIOx peripheral according to the specified parameters in the GPIO_Init. + * @param GPIOx where x can be (A..F) to select the GPIO peripheral for STM32U0xx family + * @param GPIO_Init pointer to a GPIO_InitTypeDef structure that contains + * the configuration information for the specified GPIO peripheral. + * @retval None + */ +void HAL_GPIO_Init(GPIO_TypeDef *GPIOx, const GPIO_InitTypeDef *GPIO_Init) +{ + uint32_t position = 0x00u; + uint32_t iocurrent; + uint32_t temp; + + /* Check the parameters */ + assert_param(IS_GPIO_ALL_INSTANCE(GPIOx)); + assert_param(IS_GPIO_PIN(GPIO_Init->Pin)); + assert_param(IS_GPIO_MODE(GPIO_Init->Mode)); + + /* Configure the port pins */ + while (((GPIO_Init->Pin) >> position) != 0x00u) + { + /* Get current io position */ + iocurrent = (GPIO_Init->Pin) & (1uL << position); + + if (iocurrent != 0x00u) + { + /*--------------------- GPIO Mode Configuration ------------------------*/ + /* In case of Output or Alternate function mode selection */ + if (((GPIO_Init->Mode & GPIO_MODE) == MODE_OUTPUT) || ((GPIO_Init->Mode & GPIO_MODE) == MODE_AF)) + { + /* Check the Speed parameter */ + assert_param(IS_GPIO_SPEED(GPIO_Init->Speed)); + + /* Configure the IO Speed */ + temp = GPIOx->OSPEEDR; + temp &= ~(GPIO_OSPEEDR_OSPEED0 << (position * GPIO_OSPEEDR_OSPEED1_Pos)); + temp |= (GPIO_Init->Speed << (position * GPIO_OSPEEDR_OSPEED1_Pos)); + GPIOx->OSPEEDR = temp; + + /* Configure the IO Output Type */ + temp = GPIOx->OTYPER; + temp &= ~(GPIO_OTYPER_OT0 << position) ; + temp |= (((GPIO_Init->Mode & OUTPUT_TYPE) >> OUTPUT_TYPE_POS) << position); + GPIOx->OTYPER = temp; + } + + if ((GPIO_Init->Mode & GPIO_MODE) != MODE_ANALOG) + { + /* Check the Pull parameter */ + assert_param(IS_GPIO_PULL(GPIO_Init->Pull)); + + /* Activate the Pull-up or Pull down resistor for the current IO */ + temp = GPIOx->PUPDR; + temp &= ~(GPIO_PUPDR_PUPD0 << (position * GPIO_PUPDR_PUPD1_Pos)); + temp |= ((GPIO_Init->Pull) << (position * GPIO_PUPDR_PUPD1_Pos)); + GPIOx->PUPDR = temp; + } + + /* In case of Alternate function mode selection */ + if ((GPIO_Init->Mode & GPIO_MODE) == MODE_AF) + { + /* Check the Alternate function parameters */ + assert_param(IS_GPIO_AF_INSTANCE(GPIOx)); + assert_param(IS_GPIO_AF(GPIO_Init->Alternate)); + + /* Configure Alternate function mapped with the current IO */ + temp = GPIOx->AFR[position >> 3u]; + temp &= ~(0xFu << ((position & 0x07u) * GPIO_AFRL_AFSEL1_Pos)); + temp |= ((GPIO_Init->Alternate) << ((position & 0x07u) * GPIO_AFRL_AFSEL1_Pos)); + GPIOx->AFR[position >> 3u] = temp; + } + + /* Configure IO Direction mode (Input, Output, Alternate or Analog) */ + temp = GPIOx->MODER; + temp &= ~(GPIO_MODER_MODE0 << (position * GPIO_MODER_MODE1_Pos)); + temp |= ((GPIO_Init->Mode & GPIO_MODE) << (position * GPIO_MODER_MODE1_Pos)); + GPIOx->MODER = temp; + + /*--------------------- EXTI Mode Configuration ------------------------*/ + /* Configure the External Interrupt or event for the current IO */ + if ((GPIO_Init->Mode & EXTI_MODE) != 0x00u) + { + temp = EXTI->EXTICR[position >> 2u]; + temp &= ~(0x0FuL << (EXTI_EXTICR1_EXTI1_Pos * (position & 0x03u))); + temp |= (GPIO_GET_INDEX(GPIOx) << (EXTI_EXTICR1_EXTI1_Pos * (position & 0x03u))); + EXTI->EXTICR[position >> 2u] = temp; + + /* Clear Rising Falling edge configuration */ + temp = EXTI->RTSR1; + temp &= ~(iocurrent); + if ((GPIO_Init->Mode & TRIGGER_RISING) != 0x00u) + { + temp |= iocurrent; + } + EXTI->RTSR1 = temp; + + temp = EXTI->FTSR1; + temp &= ~(iocurrent); + if ((GPIO_Init->Mode & TRIGGER_FALLING) != 0x00u) + { + temp |= iocurrent; + } + EXTI->FTSR1 = temp; + + /* Clear EXTI line configuration */ + temp = EXTI->EMR1; + temp &= ~(iocurrent); + if ((GPIO_Init->Mode & EXTI_EVT) != 0x00u) + { + temp |= iocurrent; + } + EXTI->EMR1 = temp; + + temp = EXTI->IMR1; + temp &= ~(iocurrent); + if ((GPIO_Init->Mode & EXTI_IT) != 0x00u) + { + temp |= iocurrent; + } + EXTI->IMR1 = temp; + } + } + + position++; + } +} + +/** + * @brief De-initialize the GPIOx peripheral registers to their default reset values. + * @param GPIOx where x can be (A..F) to select the GPIO peripheral for STM32U0xx family + * @param GPIO_Pin specifies the port bit to be written. + * This parameter can be any combination of GPIO_Pin_x where x can be (0..15). + * @retval None + */ +void HAL_GPIO_DeInit(GPIO_TypeDef *GPIOx, uint32_t GPIO_Pin) +{ + uint32_t position = 0x00u; + uint32_t iocurrent; + uint32_t tmp; + + /* Check the parameters */ + assert_param(IS_GPIO_ALL_INSTANCE(GPIOx)); + assert_param(IS_GPIO_PIN(GPIO_Pin)); + + /* Configure the port pins */ + while ((GPIO_Pin >> position) != 0x00u) + { + /* Get current io position */ + iocurrent = (GPIO_Pin) & (1uL << position); + + if (iocurrent != 0x00u) + { + /*------------------------- EXTI Mode Configuration --------------------*/ + /* Clear the External Interrupt or Event for the current IO */ + + tmp = EXTI->EXTICR[position >> 2u]; + tmp &= (0x0FuL << (EXTI_EXTICR1_EXTI1_Pos * (position & 0x03u))); + if (tmp == (GPIO_GET_INDEX(GPIOx) << (EXTI_EXTICR1_EXTI1_Pos * (position & 0x03u)))) + { + /* Clear EXTI line configuration */ + EXTI->IMR1 &= ~(iocurrent); + EXTI->EMR1 &= ~(iocurrent); + + /* Clear Rising Falling edge configuration */ + EXTI->FTSR1 &= ~(iocurrent); + EXTI->RTSR1 &= ~(iocurrent); + + tmp = 0x0FuL << (EXTI_EXTICR1_EXTI1_Pos * (position & 0x03u)); + EXTI->EXTICR[position >> 2u] &= ~tmp; + } + + /*------------------------- GPIO Mode Configuration --------------------*/ + /* Configure IO in Analog Mode */ + GPIOx->MODER |= (GPIO_MODER_MODE0 << (position * GPIO_MODER_MODE1_Pos)); + + /* Configure the default Alternate Function in current IO */ + GPIOx->AFR[position >> 3u] &= ~(0xFu << ((position & 0x07u) * GPIO_AFRL_AFSEL1_Pos)) ; + + /* Configure the default value for IO Speed */ + GPIOx->OSPEEDR &= ~(GPIO_OSPEEDR_OSPEED0 << (position * GPIO_OSPEEDR_OSPEED1_Pos)); + + /* Configure the default value IO Output Type */ + GPIOx->OTYPER &= ~(GPIO_OTYPER_OT0 << position) ; + + /* Deactivate the Pull-up and Pull-down resistor for the current IO */ + GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPD0 << (position * GPIO_PUPDR_PUPD1_Pos)); + } + + position++; + } +} + +/** + * @} + */ + +/** @addtogroup GPIO_Exported_Functions_Group2 + * @brief GPIO Read, Write, Toggle, Lock and EXTI management functions. + * +@verbatim + =============================================================================== + ##### IO operation functions ##### + =============================================================================== + +@endverbatim + * @{ + */ + +/** + * @brief Read the specified input port pin. + * @param GPIOx where x can be (A..F) to select the GPIO peripheral for STM32U0xx family + * @param GPIO_Pin specifies the port bit to read. + * This parameter can be any combination of GPIO_Pin_x where x can be (0..15). + * @retval The input port pin value. + */ +GPIO_PinState HAL_GPIO_ReadPin(const GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin) +{ + GPIO_PinState bitstatus; + + /* Check the parameters */ + assert_param(IS_GPIO_PIN(GPIO_Pin)); + + if ((GPIOx->IDR & GPIO_Pin) != 0x00u) + { + bitstatus = GPIO_PIN_SET; + } + else + { + bitstatus = GPIO_PIN_RESET; + } + return bitstatus; +} + +/** + * @brief Set or clear the selected data port bit. + * + * @note This function uses GPIOx_BSRR and GPIOx_BRR registers to allow atomic read/modify + * accesses. In this way, there is no risk of an IRQ occurring between + * the read and the modify access. + * + * @param GPIOx where x can be (A..F) to select the GPIO peripheral for STM32U0xx family + * @param GPIO_Pin specifies the port bit to be written. + * This parameter can be any combination of GPIO_Pin_x where x can be (0..15). + * @param PinState specifies the value to be written to the selected bit. + * This parameter can be one of the GPIO_PinState enum values: + * @arg GPIO_PIN_RESET: to clear the port pin + * @arg GPIO_PIN_SET: to set the port pin + * @retval None + */ +void HAL_GPIO_WritePin(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin, GPIO_PinState PinState) +{ + /* Check the parameters */ + assert_param(IS_GPIO_PIN(GPIO_Pin)); + assert_param(IS_GPIO_PIN_ACTION(PinState)); + + if (PinState != GPIO_PIN_RESET) + { + GPIOx->BSRR = (uint32_t)GPIO_Pin; + } + else + { + GPIOx->BRR = (uint32_t)GPIO_Pin; + } +} + +/** + * @brief Toggle the specified GPIO pin. + * @param GPIOx where x can be (A..F) to select the GPIO peripheral for STM32U0xx family + * @param GPIO_Pin specifies the pin to be toggled. + * This parameter can be any combination of GPIO_Pin_x where x can be (0..15). + * @retval None + */ +void HAL_GPIO_TogglePin(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin) +{ + uint32_t odr; + + /* Check the parameters */ + assert_param(IS_GPIO_PIN(GPIO_Pin)); + + /* get current Output Data Register value */ + odr = GPIOx->ODR; + + /* Set selected pins that were at low level, and reset ones that were high */ + GPIOx->BSRR = ((odr & GPIO_Pin) << GPIO_NUMBER) | (~odr & GPIO_Pin); +} + +/** + * @brief Lock GPIO Pins configuration registers. + * @note The locked registers are GPIOx_MODER, GPIOx_OTYPER, GPIOx_OSPEEDR, + * GPIOx_PUPDR, GPIOx_AFRL and GPIOx_AFRH. + * @note The configuration of the locked GPIO pins can no longer be modified + * until the next reset. + * @param GPIOx where x can be (A..F) to select the GPIO peripheral for STM32U0xx family + * @param GPIO_Pin specifies the port bits to be locked. + * This parameter can be any combination of GPIO_Pin_x where x can be (0..15). + * @retval None + */ +HAL_StatusTypeDef HAL_GPIO_LockPin(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin) +{ + __IO uint32_t tmp = GPIO_LCKR_LCKK; + + /* Check the parameters */ + assert_param(IS_GPIO_LOCK_INSTANCE(GPIOx)); + assert_param(IS_GPIO_PIN(GPIO_Pin)); + + /* Apply lock key write sequence */ + tmp |= GPIO_Pin; + /* Set LCKx bit(s): LCKK='1' + LCK[15-0] */ + GPIOx->LCKR = tmp; + /* Reset LCKx bit(s): LCKK='0' + LCK[15-0] */ + GPIOx->LCKR = GPIO_Pin; + /* Set LCKx bit(s): LCKK='1' + LCK[15-0] */ + GPIOx->LCKR = tmp; + /* Read LCKK register. This read is mandatory to complete key lock sequence */ + tmp = GPIOx->LCKR; + + /* read again in order to confirm lock is active */ + if ((GPIOx->LCKR & GPIO_LCKR_LCKK) != 0x00u) + { + return HAL_OK; + } + else + { + return HAL_ERROR; + } +} + +/** + * @brief Handle EXTI interrupt request. + * @param GPIO_Pin Specifies the port pin connected to corresponding EXTI line. + * @retval None + */ +void HAL_GPIO_EXTI_IRQHandler(uint16_t GPIO_Pin) +{ + /* EXTI line interrupt detected */ + if (__HAL_GPIO_EXTI_GET_RISING_IT(GPIO_Pin) != 0x00u) + { + __HAL_GPIO_EXTI_CLEAR_RISING_IT(GPIO_Pin); + HAL_GPIO_EXTI_Rising_Callback(GPIO_Pin); + } + + if (__HAL_GPIO_EXTI_GET_FALLING_IT(GPIO_Pin) != 0x00u) + { + __HAL_GPIO_EXTI_CLEAR_FALLING_IT(GPIO_Pin); + HAL_GPIO_EXTI_Falling_Callback(GPIO_Pin); + } +} + +/** + * @brief EXTI line detection callback. + * @param GPIO_Pin Specifies the port pin connected to corresponding EXTI line. + * @retval None + */ +__weak void HAL_GPIO_EXTI_Rising_Callback(uint16_t GPIO_Pin) +{ + /* Prevent unused argument(s) compilation warning */ + UNUSED(GPIO_Pin); + + /* NOTE: This function should not be modified, when the callback is needed, + the HAL_GPIO_EXTI_Rising_Callback could be implemented in the user file + */ +} + +/** + * @brief EXTI line detection callback. + * @param GPIO_Pin Specifies the port pin connected to corresponding EXTI line. + * @retval None + */ +__weak void HAL_GPIO_EXTI_Falling_Callback(uint16_t GPIO_Pin) +{ + /* Prevent unused argument(s) compilation warning */ + UNUSED(GPIO_Pin); + + /* NOTE: This function should not be modified, when the callback is needed, + the HAL_GPIO_EXTI_Falling_Callback could be implemented in the user file + */ +} +/** + * @} + */ + +/** + * @} + */ + +#endif /* HAL_GPIO_MODULE_ENABLED */ +/** + * @} + */ + +/** + * @} + */ + |