/* * Copyright (C) 2014 Loci Controls Inc. * * This file is subject to the terms and conditions of the GNU Lesser * General Public License v2.1. See the file LICENSE in the top level * directory for more details. */ /** * @defgroup cpu_cc2538_gpio CC2538 General-Purpose I/O * @ingroup cpu_cc2538_regs * @{ * * @file * @brief Driver for the cc2538 GPIO controller * * Header file with register and macro declarations for the cc2538 GPIO module * * @author Ian Martin * * @{ */ #ifndef CC2538_GPIO_H #define CC2538_GPIO_H #include #include "cc2538.h" #ifdef __cplusplus extern "C" { #endif /** * @name Numeric representation of the four GPIO ports * @{ */ enum { PORT_A = 0, PORT_B = 1, PORT_C = 2, PORT_D = 3, }; /** @} */ #define GPIO_PORT_SHIFT 3 /**< Right-shift amount to obtain the port number from a GPIO number */ #define GPIO_BITS_PER_PORT ( 1 << GPIO_PORT_SHIFT ) /**< Number of bits per GPIO port (8) */ #define GPIO_BIT_MASK ( GPIO_BITS_PER_PORT - 1 ) /**< Mask to obtain the bit number from a GPIO number */ /** * @brief Generate a bit mask in which only the specified bit is high. * * @param[in] n Number of the bit to set high in the mask. * * @return A bit mask in which bit n is high. */ #define PIN_MASK(n) ( 1 << (n) ) /** * @brief Extract the GPIO port number (0-3) from a GPIO number (0-31) * * @param[in] gpio_num GPIO number (0-31) * * @return Corresponding GPIO port number (0-3) */ #define GPIO_NUM_TO_PORT_NUM(gpio_num) ( (gpio_num) >> GPIO_PORT_SHIFT ) /** * @brief Extract the GPIO port bit number (0-7) from a GPIO number (0-31) * * @param[in] gpio_num GPIO number (0-31) * * @return Corresponding GPIO port bit number (0-7) */ #define GPIO_BIT_NUM(gpio_num) ( (gpio_num) & GPIO_BIT_MASK ) /** * @brief Generate a GPIO number given a port and bit number * * @param[in] port_num GPIO port (PORT_A, PORT_B, PORT_C, or PORT_D) * @param[in] bit_num GPIO bit number (0-7) * * @return Corresponding GPIO number (0-31) */ #define GPIO_PXX_TO_NUM(port_num, bit_num) ( ((port_num) << GPIO_PORT_SHIFT) | (bit_num) ) /** * @brief Obtain the GPIO port instance given a GPIO number (0-31) * * @param[in] gpio_num GPIO number (0-31) * * @return Corresponding GPIO port instance */ #define GPIO_NUM_TO_DEV(gpio_num) ( GPIO_A + GPIO_NUM_TO_PORT_NUM(gpio_num) ) /** * @brief Enable hardware (peripheral) control for a given GPIO pin number * * @param[in] gpio_num GPIO number (0-31) */ #define gpio_hardware_control(gpio_num) ( GPIO_NUM_TO_DEV(gpio_num)->AFSEL |= PIN_MASK(GPIO_BIT_NUM(gpio_num)) ) /** * @brief Enable software control for a given GPIO pin number * * @param[in] gpio_num GPIO number (0-31) */ #define gpio_software_control(gpio_num) ( GPIO_NUM_TO_DEV(gpio_num)->AFSEL &= ~PIN_MASK(GPIO_BIT_NUM(gpio_num)) ) /** * @brief Configure the given GPIO as an output * * @param[in] gpio_num GPIO number (0-31) */ #define gpio_dir_output(gpio_num) ( GPIO_NUM_TO_DEV(gpio_num)->DIR |= PIN_MASK(GPIO_BIT_NUM(gpio_num)) ) /** * @brief Configure the given GPIO as an input * * @param[in] gpio_num GPIO number (0-31) */ #define gpio_dir_input(gpio_num) ( GPIO_NUM_TO_DEV(gpio_num)->DIR &= ~PIN_MASK(GPIO_BIT_NUM(gpio_num)) ) /** * @brief Read the value of the given pin * * @param[in] gpio_num GPIO number (0-31) */ #define cc2538_gpio_read(gpio_num) ( (GPIO_NUM_TO_DEV(gpio_num)->DATA >> GPIO_BIT_NUM(gpio_num)) & 1 ) /** * @brief Set a specific GPIO output pin low * * @param[in] gpio_num GPIO number (0-31) */ #define cc2538_gpio_clear(gpio_num) ( GPIO_NUM_TO_DEV(gpio_num)->DATA &= ~PIN_MASK(GPIO_BIT_NUM(gpio_num)) ) /** * @name Unique names for each GPIO port/pin combination * @deprecated will be removed after adaption of periph drivers, * use GPIO_PIN macro instead * @{ */ enum { GPIO_PA0 = GPIO_PXX_TO_NUM(PORT_A, 0), /**< PA0 */ GPIO_PA1 = GPIO_PXX_TO_NUM(PORT_A, 1), /**< PA1 */ GPIO_PA2 = GPIO_PXX_TO_NUM(PORT_A, 2), /**< PA2 */ GPIO_PA3 = GPIO_PXX_TO_NUM(PORT_A, 3), /**< PA3 */ GPIO_PA4 = GPIO_PXX_TO_NUM(PORT_A, 4), /**< PA4 */ GPIO_PA5 = GPIO_PXX_TO_NUM(PORT_A, 5), /**< PA5 */ GPIO_PA6 = GPIO_PXX_TO_NUM(PORT_A, 6), /**< PA6 */ GPIO_PA7 = GPIO_PXX_TO_NUM(PORT_A, 7), /**< PA7 */ GPIO_PB0 = GPIO_PXX_TO_NUM(PORT_B, 0), /**< PB0 */ GPIO_PB1 = GPIO_PXX_TO_NUM(PORT_B, 1), /**< PB1 */ GPIO_PB2 = GPIO_PXX_TO_NUM(PORT_B, 2), /**< PB2 */ GPIO_PB3 = GPIO_PXX_TO_NUM(PORT_B, 3), /**< PB3 */ GPIO_PB4 = GPIO_PXX_TO_NUM(PORT_B, 4), /**< PB4 */ GPIO_PB5 = GPIO_PXX_TO_NUM(PORT_B, 5), /**< PB5 */ GPIO_PB6 = GPIO_PXX_TO_NUM(PORT_B, 6), /**< PB6 */ GPIO_PB7 = GPIO_PXX_TO_NUM(PORT_B, 7), /**< PB7 */ GPIO_PC0 = GPIO_PXX_TO_NUM(PORT_C, 0), /**< PC0 */ GPIO_PC1 = GPIO_PXX_TO_NUM(PORT_C, 1), /**< PC1 */ GPIO_PC2 = GPIO_PXX_TO_NUM(PORT_C, 2), /**< PC2 */ GPIO_PC3 = GPIO_PXX_TO_NUM(PORT_C, 3), /**< PC3 */ GPIO_PC4 = GPIO_PXX_TO_NUM(PORT_C, 4), /**< PC4 */ GPIO_PC5 = GPIO_PXX_TO_NUM(PORT_C, 5), /**< PC5 */ GPIO_PC6 = GPIO_PXX_TO_NUM(PORT_C, 6), /**< PC6 */ GPIO_PC7 = GPIO_PXX_TO_NUM(PORT_C, 7), /**< PC7 */ GPIO_PD0 = GPIO_PXX_TO_NUM(PORT_D, 0), /**< PD0 */ GPIO_PD1 = GPIO_PXX_TO_NUM(PORT_D, 1), /**< PD1 */ GPIO_PD2 = GPIO_PXX_TO_NUM(PORT_D, 2), /**< PD2 */ GPIO_PD3 = GPIO_PXX_TO_NUM(PORT_D, 3), /**< PD3 */ GPIO_PD4 = GPIO_PXX_TO_NUM(PORT_D, 4), /**< PD4 */ GPIO_PD5 = GPIO_PXX_TO_NUM(PORT_D, 5), /**< PD5 */ GPIO_PD6 = GPIO_PXX_TO_NUM(PORT_D, 6), /**< PD6 */ GPIO_PD7 = GPIO_PXX_TO_NUM(PORT_D, 7), /**< PD7 */ }; /** @} */ /** * @brief GPIO port component registers */ typedef struct { cc2538_reg_t RESERVED1[255]; /**< Reserved addresses */ cc2538_reg_t DATA; /**< GPIO_A Data Register */ cc2538_reg_t DIR; /**< GPIO_A data direction register */ cc2538_reg_t IS; /**< GPIO_A Interrupt Sense register */ cc2538_reg_t IBE; /**< GPIO_A Interrupt Both-Edges register */ cc2538_reg_t IEV; /**< GPIO_A Interrupt Event Register */ cc2538_reg_t IE; /**< GPIO_A Interrupt mask register */ cc2538_reg_t RIS; /**< GPIO_A Raw Interrupt Status register */ cc2538_reg_t MIS; /**< GPIO_A Masked Interrupt Status register */ cc2538_reg_t IC; /**< GPIO_A Interrupt Clear register */ cc2538_reg_t AFSEL; /**< GPIO_A Alternate Function / mode control select register */ cc2538_reg_t RESERVED2[63]; /**< Reserved addresses */ cc2538_reg_t GPIOLOCK; /**< GPIO_A Lock register */ cc2538_reg_t GPIOCR; /**< GPIO_A Commit Register */ cc2538_reg_t RESERVED3[118]; /**< Reserved addresses */ cc2538_reg_t PMUX; /**< GPIO_A The PMUX register */ cc2538_reg_t P_EDGE_CTRL; /**< GPIO_A The Port Edge Control register */ cc2538_reg_t RESERVED4[2]; /**< Reserved addresses */ cc2538_reg_t PI_IEN; /**< GPIO_A The Power-up Interrupt Enable register */ cc2538_reg_t RESERVED5[1]; /**< Reserved addresses */ cc2538_reg_t IRQ_DETECT_ACK; /**< GPIO_A IRQ Detect ACK register */ cc2538_reg_t USB_IRQ_ACK; /**< GPIO_A IRQ Detect ACK for USB */ cc2538_reg_t IRQ_DETECT_UNMASK; /**< GPIO_A IRQ Detect ACK for masked interrupts */ cc2538_reg_t RESERVED6[567]; /**< Reserved addresses */ } cc2538_gpio_t; /** * @brief GPIO port instance base address */ #define GPIO_BASE (0x400d9000) /** * @name GPIO shift and masking * @{ */ #define GPIO_PORTNUM_SHIFT (12U) /**< bit shift for GPIO port */ #define GPIO_PORTNUM_MASK (0x00007000) /**< bit mask for GPIO port [0-3] */ #define GPIO_PIN_MASK (0x00000007) /**< bit mask for GPIO pin [0-7] */ #define GPIO_PORT_MASK (0xfffff000) /**< bit mask for GPIO port addr */ /** @} */ /** * @name GPIO instance definitions * @deprecated will be removed after adaption of periph drivers * @{ */ #define GPIO_A ((cc2538_gpio_t *)0x400d9000) /**< GPIO Port A instance */ #define GPIO_B ((cc2538_gpio_t *)0x400da000) /**< GPIO Port B instance */ #define GPIO_C ((cc2538_gpio_t *)0x400db000) /**< GPIO Port C instance */ #define GPIO_D ((cc2538_gpio_t *)0x400dc000) /**< GPIO Port D instance */ /** @} */ /** * @brief IOC port component registers */ typedef struct { cc2538_reg_t SEL[32]; /**< select special function for output pin*/ cc2538_reg_t OVER[32]; /**< override pin mode, enable alternate mode */ cc2538_reg_t PINS[21]; /**< select input pin for special functions */ } cc2538_ioc_t; /** * @name Peripheral Signal Select Values (for IOC_Pxx_SEL registers) * @{ */ typedef enum { UART0_TXD = 0, /**< UART0 TXD */ UART1_RTS, /**< UART1 RTS */ UART1_TXD, /**< UART1 TXD */ SSI0_TXD, /**< SSI0 TXD */ SSI0_CLK_OUT, /**< SSI0 CLKOUT */ SSI0_FSS_OUT, /**< SSI0 FSSOUT */ SSI0_TX_SER, /**< SSI0 STXSER EN */ SSI1_TXD, /**< SSI1 TXD */ SSI1_CLK_OUT, /**< SSI1 CLKOUT */ SSI1_FSS_OUT, /**< SSI1 FSSOUT */ SSI1_TX_SER, /**< SSI1 STXSER EN */ I2C_SDA_OUT, /**< I2C CMSSDA */ I2C_SCL_OUT, /**< I2C CMSSCL */ GPT0_ICP1, /**< GPT0 ICP1 */ GPT0_ICP2, /**< GPT0 ICP2 */ GPT1_ICP1, /**< GPT1 ICP1 */ GPT1_ICP2, /**< GPT1 ICP2 */ GPT2_ICP1, /**< GPT2 ICP1 */ GPT2_ICP2, /**< GPT2 ICP2 */ GPT3_ICP1, /**< GPT3 ICP1 */ GPT3_ICP2 , /**< GPT3 ICP2 */ } cc2538_ioc_sel_t; /** @} */ /** * @name Pin select for periphical functions * @{ */ typedef enum { UART0_RXD = 0, /**< UART0 RXD */ UART1_CTS, /**< UART1 CTS */ UART1_RXD, /**< UART1 RXD */ SSI0_CLK, /**< SSI0 CLK */ SSI0_RXD, /**< SSI0 RXD */ SSI0_FSS_IN, /**< SSI0 FSS IN */ SSI0_CLK_IN, /**< SSI0 CLK IN */ SSI1_CLK, /**< SSI1 CLK */ SSI1_RXD, /**< SSI1 RXD */ SSI1_FSS_IN, /**< SSI1 FSS IN */ SSI1_CLK_IN, /**< SSI1 CLK IN */ I2C_SDA_IN, /**< I2C SDA IN */ I2C_SCL_IN, /**< I2C SCL IN */ GPT0_OCP1, /**< GPT0 OCP1 */ GPT0_OCP2, /**< GPT0 OCP2 */ GPT1_OCP1, /**< GPT1 OCP1 */ GPT1_OCP2, /**< GPT1 OCP2 */ GPT2_OCP1, /**< GPT2 OCP1 */ GPT2_OCP2, /**< GPT2 OCP2 */ GPT3_OCP1, /**< GPT3 OCP1 */ GPT3_OCP2, /**< GPT3 OCP2 */ } cc2538_ioc_pin_t; /** @} */ /** * @brief Values to override pin configuration */ typedef enum { OVERRIDE_DISABLE = 0x0, OVERRIDE_ANALOG = 0x1, OVERRIDE_PULLDOWN = 0x2, OVERRIDE_PULLUP = 0x4, OVERRIDE_ENABLE = 0x8, } cc2538_ioc_over_t; /** * @name Values for IOC_PXX_OVER * @deprecated will be removed after adaption of periph drivers, * use cc2538_ioc_over_t instead * @{ */ #define IOC_OVERRIDE_OE 0x00000008 /**< Output Enable */ #define IOC_OVERRIDE_PUE 0x00000004 /**< Pull Up Enable */ #define IOC_OVERRIDE_PDE 0x00000002 /**< Pull Down Enable */ #define IOC_OVERRIDE_ANA 0x00000001 /**< Analog Enable */ #define IOC_OVERRIDE_DIS 0x00000000 /**< Override Disabled */ /** @} */ /** * @brief IOC instance definition */ #define IOC ((cc2538_ioc_t *)0x400d4000) /** * @name Port control register addresses * @deprecated will be removed after adaption of periph drivers, * use IOC->OVER and IOC->SEL instead * @{ */ #define IOC_PXX_OVER (IOC->OVER) #define IOC_PXX_SEL (IOC->SEL) /** @} */ #ifdef __cplusplus } /* end extern "C" */ #endif #endif /* CC2538_GPIO_H */ /** @} */ /** @} */