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/******************************************************************************
* The MIT License
*
* Copyright (c) 2010 Perry Hung.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*****************************************************************************/
/**
* @file gpio.h
*
* @brief General purpose I/0 (GPIO) and Alternate Function I/O
* (AFIO) prototypes, defines, and inlined access functions.
*/
#ifndef _GPIO_H_
#define _GPIO_H_
#include "libmaple.h"
#include "rcc.h"
#ifdef __cplusplus
extern "C"{
#endif
/*
* GPIO register maps and devices
*/
/** GPIO register map type */
typedef struct gpio_reg_map {
__io uint32 CRL; /**< Port configuration register low */
__io uint32 CRH; /**< Port configuration register high */
__io uint32 IDR; /**< Port input data register */
__io uint32 ODR; /**< Port output data register */
__io uint32 BSRR; /**< Port bit set/reset register */
__io uint32 BRR; /**< Port bit reset register */
__io uint32 LCKR; /**< Port configuration lock register */
} gpio_reg_map;
/**
* External interrupt line port selector. Used to determine which
* GPIO port to map an external interrupt line onto. */
/* (See AFIO sections, below) */
typedef enum {
AFIO_EXTI_PA, /**< Use PAx pin. */
AFIO_EXTI_PB, /**< Use PBx pin. */
AFIO_EXTI_PC, /**< Use PCx pin. */
AFIO_EXTI_PD, /**< Use PDx pin. */
#ifdef STM32_HIGH_DENSITY
AFIO_EXTI_PE, /**< Use PEx pin. */
AFIO_EXTI_PF, /**< Use PFx pin. */
AFIO_EXTI_PG, /**< Use PGx pin. */
#endif
} afio_exti_port;
/** GPIO device type */
typedef struct gpio_dev {
gpio_reg_map *regs; /**< Register map */
rcc_clk_id clk_id; /**< RCC clock information */
afio_exti_port exti_port; /**< AFIO external interrupt port value */
} gpio_dev;
extern gpio_dev gpioa;
extern gpio_dev* const GPIOA;
extern gpio_dev gpiob;
extern gpio_dev* const GPIOB;
extern gpio_dev gpioc;
extern gpio_dev* const GPIOC;
extern gpio_dev gpiod;
extern gpio_dev* const GPIOD;
#ifdef STM32_HIGH_DENSITY
extern gpio_dev gpioe;
extern gpio_dev* const GPIOE;
extern gpio_dev gpiof;
extern gpio_dev* const GPIOF;
extern gpio_dev gpiog;
extern gpio_dev* const GPIOG;
#endif
/** GPIO port A register map base pointer */
#define GPIOA_BASE ((gpio_reg_map*)0x40010800)
/** GPIO port B register map base pointer */
#define GPIOB_BASE ((gpio_reg_map*)0x40010C00)
/** GPIO port C register map base pointer */
#define GPIOC_BASE ((gpio_reg_map*)0x40011000)
/** GPIO port D register map base pointer */
#define GPIOD_BASE ((gpio_reg_map*)0x40011400)
#ifdef STM32_HIGH_DENSITY
/** GPIO port E register map base pointer */
#define GPIOE_BASE ((gpio_reg_map*)0x40011800)
/** GPIO port F register map base pointer */
#define GPIOF_BASE ((gpio_reg_map*)0x40011C00)
/** GPIO port G register map base pointer */
#define GPIOG_BASE ((gpio_reg_map*)0x40012000)
#endif
/*
* GPIO register bit definitions
*/
/* Control registers, low and high */
#define GPIO_CR_CNF_INPUT_ANALOG (0x0 << 2)
#define GPIO_CR_CNF_INPUT_FLOATING (0x1 << 2)
#define GPIO_CR_CNF_INPUT_PU_PD (0x2 << 2)
#define GPIO_CR_CNF_OUTPUT_PP (0x0 << 2)
#define GPIO_CR_CNF_OUTPUT_OD (0x1 << 2)
#define GPIO_CR_CNF_AF_OUTPUT_PP (0x2 << 2)
#define GPIO_CR_CNF_AF_OUTPUT_OD (0x3 << 2)
#define GPIO_CR_MODE_INPUT 0x0
#define GPIO_CR_MODE_OUTPUT_10MHZ 0x1
#define GPIO_CR_MODE_OUTPUT_2MHZ 0x2
#define GPIO_CR_MODE_OUTPUT_50MHZ 0x3
/** GPIO Pin modes. These only allow for 50MHZ max output speeds; if
* you want slower, use direct register access. */
typedef enum gpio_pin_mode {
GPIO_OUTPUT_PP = (GPIO_CR_CNF_OUTPUT_PP |
GPIO_CR_MODE_OUTPUT_50MHZ), /**< Output push-pull. */
GPIO_OUTPUT_OD = (GPIO_CR_CNF_OUTPUT_OD |
GPIO_CR_MODE_OUTPUT_50MHZ), /**< Output open-drain. */
GPIO_AF_OUTPUT_PP = (GPIO_CR_CNF_AF_OUTPUT_PP |
GPIO_CR_MODE_OUTPUT_50MHZ), /**< Alternate function
output push-pull. */
GPIO_AF_OUTPUT_OD = (GPIO_CR_CNF_AF_OUTPUT_OD |
GPIO_CR_MODE_OUTPUT_50MHZ), /**< Alternate function
output open drain. */
GPIO_INPUT_ANALOG = (GPIO_CR_CNF_INPUT_ANALOG |
GPIO_CR_MODE_INPUT), /**< Analog input. */
GPIO_INPUT_FLOATING = (GPIO_CR_CNF_INPUT_FLOATING |
GPIO_CR_MODE_INPUT), /**< Input floating. */
GPIO_INPUT_PD = (GPIO_CR_CNF_INPUT_PU_PD |
GPIO_CR_MODE_INPUT), /**< Input pull-down. */
GPIO_INPUT_PU /**< Input pull-up. */
/* GPIO_INPUT_PU treated as a special case, for ODR twiddling */
} gpio_pin_mode;
/*
* GPIO Convenience routines
*/
void gpio_init(gpio_dev *dev);
void gpio_init_all(void);
void gpio_set_mode(gpio_dev *dev, uint8 pin, gpio_pin_mode mode);
/**
* @brief Get a GPIO port's corresponding afio_exti_port.
* @param dev GPIO device whose afio_exti_port to return.
*/
static inline afio_exti_port gpio_exti_port(gpio_dev *dev) {
return dev->exti_port;
}
/**
* Set or reset a GPIO pin.
*
* Pin must have previously been configured to output mode.
*
* @param dev GPIO device whose pin to set.
* @param pin Pin on to set or reset
* @param val If true, set the pin. If false, reset the pin.
*/
static inline void gpio_write_bit(gpio_dev *dev, uint8 pin, uint8 val) {
if (val) {
dev->regs->BSRR = BIT(pin);
} else {
dev->regs->BRR = BIT(pin);
}
}
/**
* Determine whether or not a GPIO pin is set.
*
* Pin must have previously been configured to input mode.
*
* @param dev GPIO device whose pin to test.
* @param pin Pin on dev to test.
* @return True if the pin is set, false otherwise.
*/
static inline uint32 gpio_read_bit(gpio_dev *dev, uint8 pin) {
return dev->regs->IDR & BIT(pin);
}
/**
* Toggle a pin configured as output push-pull.
* @param dev GPIO device.
* @param pin Pin on dev to toggle.
*/
static inline void gpio_toggle_bit(gpio_dev *dev, uint8 pin) {
dev->regs->ODR = dev->regs->ODR ^ BIT(pin);
}
/*
* AFIO register map
*/
/** AFIO register map */
typedef struct afio_reg_map {
__io uint32 EVCR; /**< Event control register. */
__io uint32 MAPR; /**< AF remap and debug I/O configuration
register. */
__io uint32 EXTICR1; /**< External interrupt configuration
register 1. */
__io uint32 EXTICR2; /**< External interrupt configuration
register 2. */
__io uint32 EXTICR3; /**< External interrupt configuration
register 3. */
__io uint32 EXTICR4; /**< External interrupt configuration
register 4. */
__io uint32 MAPR2; /**< AF remap and debug I/O configuration
register 2. */
} afio_reg_map;
/** AFIO register map base pointer. */
#define AFIO_BASE ((afio_reg_map *)0x40010000)
/*
* AFIO register bit definitions
*/
/* Event control register */
#define AFIO_EVCR_EVOE (0x1 << 7)
#define AFIO_EVCR_PORT_PA (0x0 << 4)
#define AFIO_EVCR_PORT_PB (0x1 << 4)
#define AFIO_EVCR_PORT_PC (0x2 << 4)
#define AFIO_EVCR_PORT_PD (0x3 << 4)
#define AFIO_EVCR_PORT_PE (0x4 << 4)
#define AFIO_EVCR_PIN_0 0x0
#define AFIO_EVCR_PIN_1 0x1
#define AFIO_EVCR_PIN_2 0x2
#define AFIO_EVCR_PIN_3 0x3
#define AFIO_EVCR_PIN_4 0x4
#define AFIO_EVCR_PIN_5 0x5
#define AFIO_EVCR_PIN_6 0x6
#define AFIO_EVCR_PIN_7 0x7
#define AFIO_EVCR_PIN_8 0x8
#define AFIO_EVCR_PIN_9 0x9
#define AFIO_EVCR_PIN_10 0xA
#define AFIO_EVCR_PIN_11 0xB
#define AFIO_EVCR_PIN_12 0xC
#define AFIO_EVCR_PIN_13 0xD
#define AFIO_EVCR_PIN_14 0xE
#define AFIO_EVCR_PIN_15 0xF
/* AF remap and debug I/O configuration register */
#define AFIO_MAPR_SWJ_FULL_SWJ (0x0 << 24)
#define AFIO_MAPR_SWJ_FULL_SWJ_NO_NJRST (0x1 << 24)
#define AFIO_MAPR_SWJ_NO_JTAG_SW (0x2 << 24)
#define AFIO_MAPR_SWJ_NO_JTAG_NO_SW (0x4 << 24)
#define AFIO_MAPR_ADC2_ETRGREG_REMAP BIT(20)
#define AFIO_MAPR_ADC2_ETRGINJ_REMAP BIT(19)
#define AFIO_MAPR_ADC1_ETRGREG_REMAP BIT(18)
#define AFIO_MAPR_ADC1_ETRGINJ_REMAP BIT(17)
#define AFIO_MAPR_TIM5CH4_IREMAP BIT(16)
#define AFIO_MAPR_PD01_REMAP BIT(15)
#define AFIO_MAPR_CAN_REMAP (BIT(14) | BIT(13))
#define AFIO_MAPR_TIM4_REMAP_FULL BIT(12)
#define AFIO_MAPR_TIM3_REMAP (BIT(11) | BIT(10))
#define AFIO_MAPR_TIM2_REMAP (BIT(9) | BIT(8))
#define AFIO_MAPR_TIM1_REMAP (BIT(7) | BIT(6))
#define AFIO_MAPR_USART3_REMAP (BIT(5) | BIT(4))
#define AFIO_MAPR_USART2_REMAP BIT(3)
#define AFIO_MAPR_USART1_REMAP BIT(2)
#define AFIO_MAPR_I2C1_REMAP BIT(1)
#define AFIO_MAPR_SPI1_REMAP BIT(0)
/* External interrupt configuration registers */
/**
* External interrupt line numbers.
*/
typedef enum {
AFIO_EXTI_0, /**< External interrupt line 0. */
AFIO_EXTI_1, /**< External interrupt line 1. */
AFIO_EXTI_2, /**< External interrupt line 2. */
AFIO_EXTI_3, /**< External interrupt line 3. */
AFIO_EXTI_4, /**< External interrupt line 4. */
AFIO_EXTI_5, /**< External interrupt line 5. */
AFIO_EXTI_6, /**< External interrupt line 6. */
AFIO_EXTI_7, /**< External interrupt line 7. */
AFIO_EXTI_8, /**< External interrupt line 8. */
AFIO_EXTI_9, /**< External interrupt line 9. */
AFIO_EXTI_10, /**< External interrupt line 10. */
AFIO_EXTI_11, /**< External interrupt line 11. */
AFIO_EXTI_12, /**< External interrupt line 12. */
AFIO_EXTI_13, /**< External interrupt line 13. */
AFIO_EXTI_14, /**< External interrupt line 14. */
AFIO_EXTI_15, /**< External interrupt line 15. */
} afio_exti_num;
/* AF remap and debug I/O configuration register 2 */
#define AFIO_MAPR2_FSMC_NADV BIT(10)
#define AFIO_MAPR2_TIM14_REMAP BIT(9)
#define AFIO_MAPR2_TIM13_REMAP BIT(8)
#define AFIO_MAPR2_TIM11_REMAP BIT(7)
#define AFIO_MAPR2_TIM10_REMAP BIT(6)
#define AFIO_MAPR2_TIM9_REMAP BIT(5)
/*
* AFIO convenience routines
*/
void afio_init(void);
void afio_exti_select(afio_exti_num exti, afio_exti_port gpio_port);
/**
* Set the SWJ_CONFIG bits in the AFIO MAPR register.
*
* @param config Desired SWJ_CONFIG bits setting. One of:
* AFIO_MAPR_SWJ_FULL_SWJ (full SWJ),
* AFIO_MAPR_SWJ_FULL_SWJ_NO_NJRST (full SWJ, no NJTRST),
* AFIO_MAPR_SWJ_NO_JTAG_SW (JTAG-DP disabled, SW-DP enabled),
* AFIO_MAPR_SWJ_NO_JTAG_NO_SW (JTAG-DP and SW-DP both disabled).
*/
static inline void afio_mapr_swj_config(uint32 config) {
__io uint32 *mapr = &AFIO_BASE->MAPR;
*mapr = (*mapr & ~(0x7 << 24)) | config;
}
#ifdef __cplusplus
}
#endif
#endif
|
