diff options
| -rw-r--r-- | libmaple/gpio.c | 151 | ||||
| -rw-r--r-- | libmaple/include/libmaple/gpio.h | 450 | ||||
| -rw-r--r-- | libmaple/stm32f1/gpio.c | 184 | ||||
| -rw-r--r-- | libmaple/stm32f1/include/family/gpio.h | 479 | ||||
| -rw-r--r-- | libmaple/stm32f1/rules.mk | 1 |
5 files changed, 676 insertions, 589 deletions
diff --git a/libmaple/gpio.c b/libmaple/gpio.c index e607595..64b2d54 100644 --- a/libmaple/gpio.c +++ b/libmaple/gpio.c @@ -26,76 +26,14 @@ /** * @file gpio.c - * @brief GPIO initialization routine + * @brief Generic STM32 GPIO support. */ #include <libmaple/gpio.h> #include <libmaple/rcc.h> /* - * GPIO devices - */ - -gpio_dev gpioa = { - .regs = GPIOA_BASE, - .clk_id = RCC_GPIOA, - .exti_port = AFIO_EXTI_PA, -}; -/** GPIO port A device. */ -gpio_dev* const GPIOA = &gpioa; - -gpio_dev gpiob = { - .regs = GPIOB_BASE, - .clk_id = RCC_GPIOB, - .exti_port = AFIO_EXTI_PB, -}; -/** GPIO port B device. */ -gpio_dev* const GPIOB = &gpiob; - -gpio_dev gpioc = { - .regs = GPIOC_BASE, - .clk_id = RCC_GPIOC, - .exti_port = AFIO_EXTI_PC, -}; -/** GPIO port C device. */ -gpio_dev* const GPIOC = &gpioc; - -gpio_dev gpiod = { - .regs = GPIOD_BASE, - .clk_id = RCC_GPIOD, - .exti_port = AFIO_EXTI_PD, -}; -/** GPIO port D device. */ -gpio_dev* const GPIOD = &gpiod; - -#ifdef STM32_HIGH_DENSITY -gpio_dev gpioe = { - .regs = GPIOE_BASE, - .clk_id = RCC_GPIOE, - .exti_port = AFIO_EXTI_PE, -}; -/** GPIO port E device. */ -gpio_dev* const GPIOE = &gpioe; - -gpio_dev gpiof = { - .regs = GPIOF_BASE, - .clk_id = RCC_GPIOF, - .exti_port = AFIO_EXTI_PF, -}; -/** GPIO port F device. */ -gpio_dev* const GPIOF = &gpiof; - -gpio_dev gpiog = { - .regs = GPIOG_BASE, - .clk_id = RCC_GPIOG, - .exti_port = AFIO_EXTI_PG, -}; -/** GPIO port G device. */ -gpio_dev* const GPIOG = &gpiog; -#endif - -/* - * GPIO convenience routines + * GPIO routines */ /** @@ -109,88 +47,3 @@ void gpio_init(gpio_dev *dev) { rcc_clk_enable(dev->clk_id); rcc_reset_dev(dev->clk_id); } - -/** - * Initialize and reset all available GPIO devices. - */ -void gpio_init_all(void) { - gpio_init(GPIOA); - gpio_init(GPIOB); - gpio_init(GPIOC); - gpio_init(GPIOD); -#ifdef STM32_HIGH_DENSITY - gpio_init(GPIOE); - gpio_init(GPIOF); - gpio_init(GPIOG); -#endif -} - -/** - * Set the mode of a GPIO pin. - * - * @param dev GPIO device. - * @param pin Pin on the device whose mode to set, 0--15. - * @param mode General purpose or alternate function mode to set the pin to. - * @see gpio_pin_mode - */ -void gpio_set_mode(gpio_dev *dev, uint8 pin, gpio_pin_mode mode) { - gpio_reg_map *regs = dev->regs; - __io uint32 *cr = ®s->CRL + (pin >> 3); - uint32 shift = (pin & 0x7) * 4; - uint32 tmp = *cr; - - tmp &= ~(0xF << shift); - tmp |= (mode == GPIO_INPUT_PU ? GPIO_INPUT_PD : mode) << shift; - *cr = tmp; - - if (mode == GPIO_INPUT_PD) { - regs->ODR &= ~BIT(pin); - } else if (mode == GPIO_INPUT_PU) { - regs->ODR |= BIT(pin); - } -} - -/* - * AFIO - */ - -/** - * @brief Initialize the AFIO clock, and reset the AFIO registers. - */ -void afio_init(void) { - rcc_clk_enable(RCC_AFIO); - rcc_reset_dev(RCC_AFIO); -} - -#define AFIO_EXTI_SEL_MASK 0xF - -/** - * @brief Select a source input for an external interrupt. - * - * @param exti External interrupt. - * @param gpio_port Port which contains pin to use as source input. - * @see afio_exti_num - * @see afio_exti_port - */ -void afio_exti_select(afio_exti_num exti, afio_exti_port gpio_port) { - __io uint32 *exti_cr = &AFIO_BASE->EXTICR1 + exti / 4; - uint32 shift = 4 * (exti % 4); - uint32 cr = *exti_cr; - - cr &= ~(AFIO_EXTI_SEL_MASK << shift); - cr |= gpio_port << shift; - *exti_cr = cr; -} - -/** - * @brief Perform an alternate function remap. - * @param remapping Remapping to perform. - */ -void afio_remap(afio_remap_peripheral remapping) { - if (remapping & AFIO_REMAP_USE_MAPR2) { - remapping &= ~AFIO_REMAP_USE_MAPR2; - AFIO_BASE->MAPR2 |= remapping; - } else { - AFIO_BASE->MAPR |= remapping; - } -} diff --git a/libmaple/include/libmaple/gpio.h b/libmaple/include/libmaple/gpio.h index 685e1b1..e821ad4 100644 --- a/libmaple/include/libmaple/gpio.h +++ b/libmaple/include/libmaple/gpio.h @@ -25,10 +25,8 @@ *****************************************************************************/ /** - * @file gpio.h - * - * @brief General purpose I/O (GPIO) and Alternate Function I/O - * (AFIO) prototypes, defines, and inlined access functions. + * @file gpio.h + * @brief General Purpose I/O (GPIO) interace. */ #ifndef _LIBMAPLE_GPIO_H_ @@ -38,129 +36,13 @@ extern "C"{ #endif -#include <libmaple/libmaple.h> -#include <libmaple/rcc.h> - /* - * 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; - -/** - * @brief 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_port { - AFIO_EXTI_PA, /**< Use port A (PAx) pin. */ - AFIO_EXTI_PB, /**< Use port B (PBx) pin. */ - AFIO_EXTI_PC, /**< Use port C (PCx) pin. */ - AFIO_EXTI_PD, /**< Use port D (PDx) pin. */ -#ifdef STM32_HIGH_DENSITY - AFIO_EXTI_PE, /**< Use port E (PEx) pin. */ - AFIO_EXTI_PF, /**< Use port F (PFx) pin. */ - AFIO_EXTI_PG, /**< Use port G (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 ((struct gpio_reg_map*)0x40010800) -/** GPIO port B register map base pointer */ -#define GPIOB_BASE ((struct gpio_reg_map*)0x40010C00) -/** GPIO port C register map base pointer */ -#define GPIOC_BASE ((struct gpio_reg_map*)0x40011000) -/** GPIO port D register map base pointer */ -#define GPIOD_BASE ((struct gpio_reg_map*)0x40011400) -#ifdef STM32_HIGH_DENSITY -/** GPIO port E register map base pointer */ -#define GPIOE_BASE ((struct gpio_reg_map*)0x40011800) -/** GPIO port F register map base pointer */ -#define GPIOF_BASE ((struct gpio_reg_map*)0x40011C00) -/** GPIO port G register map base pointer */ -#define GPIOG_BASE ((struct gpio_reg_map*)0x40012000) -#endif - -/* - * GPIO register bit definitions - */ - -/* Control registers, low and high */ - -#define GPIO_CR_CNF (0x3 << 2) -#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 0x3 -#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 - -/** - * @brief GPIO Pin modes. - * - * These only allow for 50MHZ max output speeds; if you want slower, - * use direct register access. + * Note: Family header must define: + * - struct gpio_dev (and declare extern pointers to family-provided ones) + * - enum gpio_pin_mode (TODO think hard on this) */ -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; +#include <family/gpio.h> +#include <libmaple/libmaple.h> /* * GPIO Convenience routines @@ -168,17 +50,10 @@ typedef enum gpio_pin_mode { void gpio_init(gpio_dev *dev); void gpio_init_all(void); +/* TODO deprecate this? We should probably take a flags argument. */ 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. @@ -188,11 +63,8 @@ static inline afio_exti_port gpio_exti_port(gpio_dev *dev) { * @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); - } + val = !!val; + dev->regs->BSRR = BIT(pin) << (16 * val); } /** @@ -217,308 +89,6 @@ 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 ((struct 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_CFG (0x7 << 24) -#define AFIO_MAPR_SWJ_CFG_FULL_SWJ (0x0 << 24) -#define AFIO_MAPR_SWJ_CFG_FULL_SWJ_NO_NJRST (0x1 << 24) -#define AFIO_MAPR_SWJ_CFG_NO_JTAG_SW (0x2 << 24) -#define AFIO_MAPR_SWJ_CFG_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 (0x3 << 13) -#define AFIO_MAPR_CAN_REMAP_NONE (0x0 << 13) -#define AFIO_MAPR_CAN_REMAP_PB8_PB9 (0x2 << 13) -#define AFIO_MAPR_CAN_REMAP_PD0_PD1 (0x3 << 13) -#define AFIO_MAPR_TIM4_REMAP BIT(12) -#define AFIO_MAPR_TIM3_REMAP (0x3 << 10) -#define AFIO_MAPR_TIM3_REMAP_NONE (0x0 << 10) -#define AFIO_MAPR_TIM3_REMAP_PARTIAL (0x2 << 10) -#define AFIO_MAPR_TIM3_REMAP_FULL (0x3 << 10) -#define AFIO_MAPR_TIM2_REMAP (0x3 << 8) -#define AFIO_MAPR_TIM2_REMAP_NONE (0x0 << 8) -#define AFIO_MAPR_TIM2_REMAP_PA15_PB3_PA2_PA3 (0x1 << 8) -#define AFIO_MAPR_TIM2_REMAP_PA0_PA1_PB10_PB11 (0x2 << 8) -#define AFIO_MAPR_TIM2_REMAP_FULL (0x3 << 8) -#define AFIO_MAPR_TIM1_REMAP (0x3 << 6) -#define AFIO_MAPR_TIM1_REMAP_NONE (0x0 << 6) -#define AFIO_MAPR_TIM1_REMAP_PARTIAL (0x1 << 6) -#define AFIO_MAPR_TIM1_REMAP_FULL (0x3 << 6) -#define AFIO_MAPR_USART3_REMAP (0x3 << 4) -#define AFIO_MAPR_USART3_REMAP_NONE (0x0 << 4) -#define AFIO_MAPR_USART3_REMAP_PARTIAL (0x1 << 4) -#define AFIO_MAPR_USART3_REMAP_FULL (0x3 << 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 register 1 */ - -#define AFIO_EXTICR1_EXTI3 (0xF << 12) -#define AFIO_EXTICR1_EXTI3_PA (0x0 << 12) -#define AFIO_EXTICR1_EXTI3_PB (0x1 << 12) -#define AFIO_EXTICR1_EXTI3_PC (0x2 << 12) -#define AFIO_EXTICR1_EXTI3_PD (0x3 << 12) -#define AFIO_EXTICR1_EXTI3_PE (0x4 << 12) -#define AFIO_EXTICR1_EXTI3_PF (0x5 << 12) -#define AFIO_EXTICR1_EXTI3_PG (0x6 << 12) -#define AFIO_EXTICR1_EXTI2 (0xF << 8) -#define AFIO_EXTICR1_EXTI2_PA (0x0 << 8) -#define AFIO_EXTICR1_EXTI2_PB (0x1 << 8) -#define AFIO_EXTICR1_EXTI2_PC (0x2 << 8) -#define AFIO_EXTICR1_EXTI2_PD (0x3 << 8) -#define AFIO_EXTICR1_EXTI2_PE (0x4 << 8) -#define AFIO_EXTICR1_EXTI2_PF (0x5 << 8) -#define AFIO_EXTICR1_EXTI2_PG (0x6 << 8) -#define AFIO_EXTICR1_EXTI1 (0xF << 4) -#define AFIO_EXTICR1_EXTI1_PA (0x0 << 4) -#define AFIO_EXTICR1_EXTI1_PB (0x1 << 4) -#define AFIO_EXTICR1_EXTI1_PC (0x2 << 4) -#define AFIO_EXTICR1_EXTI1_PD (0x3 << 4) -#define AFIO_EXTICR1_EXTI1_PE (0x4 << 4) -#define AFIO_EXTICR1_EXTI1_PF (0x5 << 4) -#define AFIO_EXTICR1_EXTI1_PG (0x6 << 4) -#define AFIO_EXTICR1_EXTI0 0xF -#define AFIO_EXTICR1_EXTI0_PA 0x0 -#define AFIO_EXTICR1_EXTI0_PB 0x1 -#define AFIO_EXTICR1_EXTI0_PC 0x2 -#define AFIO_EXTICR1_EXTI0_PD 0x3 -#define AFIO_EXTICR1_EXTI0_PE 0x4 -#define AFIO_EXTICR1_EXTI0_PF 0x5 -#define AFIO_EXTICR1_EXTI0_PG 0x6 - -/* External interrupt configuration register 2 */ - -#define AFIO_EXTICR2_EXTI7 (0xF << 12) -#define AFIO_EXTICR2_EXTI7_PA (0x0 << 12) -#define AFIO_EXTICR2_EXTI7_PB (0x1 << 12) -#define AFIO_EXTICR2_EXTI7_PC (0x2 << 12) -#define AFIO_EXTICR2_EXTI7_PD (0x3 << 12) -#define AFIO_EXTICR2_EXTI7_PE (0x4 << 12) -#define AFIO_EXTICR2_EXTI7_PF (0x5 << 12) -#define AFIO_EXTICR2_EXTI7_PG (0x6 << 12) -#define AFIO_EXTICR2_EXTI6 (0xF << 8) -#define AFIO_EXTICR2_EXTI6_PA (0x0 << 8) -#define AFIO_EXTICR2_EXTI6_PB (0x1 << 8) -#define AFIO_EXTICR2_EXTI6_PC (0x2 << 8) -#define AFIO_EXTICR2_EXTI6_PD (0x3 << 8) -#define AFIO_EXTICR2_EXTI6_PE (0x4 << 8) -#define AFIO_EXTICR2_EXTI6_PF (0x5 << 8) -#define AFIO_EXTICR2_EXTI6_PG (0x6 << 8) -#define AFIO_EXTICR2_EXTI5 (0xF << 4) -#define AFIO_EXTICR2_EXTI5_PA (0x0 << 4) -#define AFIO_EXTICR2_EXTI5_PB (0x1 << 4) -#define AFIO_EXTICR2_EXTI5_PC (0x2 << 4) -#define AFIO_EXTICR2_EXTI5_PD (0x3 << 4) -#define AFIO_EXTICR2_EXTI5_PE (0x4 << 4) -#define AFIO_EXTICR2_EXTI5_PF (0x5 << 4) -#define AFIO_EXTICR2_EXTI5_PG (0x6 << 4) -#define AFIO_EXTICR2_EXTI4 0xF -#define AFIO_EXTICR2_EXTI4_PA 0x0 -#define AFIO_EXTICR2_EXTI4_PB 0x1 -#define AFIO_EXTICR2_EXTI4_PC 0x2 -#define AFIO_EXTICR2_EXTI4_PD 0x3 -#define AFIO_EXTICR2_EXTI4_PE 0x4 -#define AFIO_EXTICR2_EXTI4_PF 0x5 -#define AFIO_EXTICR2_EXTI4_PG 0x6 - -/* 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); - -/** - * External interrupt line numbers. - */ -typedef enum afio_exti_num { - 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; - -void afio_exti_select(afio_exti_num exti, afio_exti_port gpio_port); - -/* HACK: Use upper bit to denote MAPR2, Bit 31 is reserved and - * not used in either MAPR or MAPR2 */ -#define AFIO_REMAP_USE_MAPR2 (1 << 31) - -/** - * @brief Available peripheral remaps. - * @see afio_remap() - */ -typedef enum afio_remap_peripheral { - AFIO_REMAP_ADC2_ETRGREG = AFIO_MAPR_ADC2_ETRGREG_REMAP, /**< - ADC 2 external trigger regular conversion remapping */ - AFIO_REMAP_ADC2_ETRGINJ = AFIO_MAPR_ADC2_ETRGINJ_REMAP, /**< - ADC 2 external trigger injected conversion remapping */ - AFIO_REMAP_ADC1_ETRGREG = AFIO_MAPR_ADC1_ETRGREG_REMAP, /**< - ADC 1 external trigger regular conversion remapping */ - AFIO_REMAP_ADC1_ETRGINJ = AFIO_MAPR_ADC1_ETRGINJ_REMAP, /**< - ADC 1 external trigger injected conversion remapping */ - AFIO_REMAP_TIM5CH4_I = AFIO_MAPR_TIM5CH4_IREMAP, /**< - Timer 5 channel 4 internal remapping */ - AFIO_REMAP_PD01 = AFIO_MAPR_PD01_REMAP, /**< - Port D0/Port D1 mapping on OSC_IN/OSC_OUT */ - AFIO_REMAP_CAN_1 = AFIO_MAPR_CAN_REMAP_PB8_PB9, /**< - CAN alternate function remapping 1 (RX on PB8, TX on PB9) */ - AFIO_REMAP_CAN_2 = AFIO_MAPR_CAN_REMAP_PD0_PD1, /**< - CAN alternate function remapping 2 (RX on PD0, TX on PD1) */ - AFIO_REMAP_TIM4 = AFIO_MAPR_TIM4_REMAP, /**< - Timer 4 remapping */ - AFIO_REMAP_TIM3_PARTIAL = AFIO_MAPR_TIM3_REMAP_PARTIAL, /**< - Timer 3 partial remapping */ - AFIO_REMAP_TIM3_FULL = AFIO_MAPR_TIM3_REMAP_FULL, /**< - Timer 3 full remapping */ - AFIO_REMAP_TIM2_PARTIAL_1 = AFIO_MAPR_TIM2_REMAP_PA15_PB3_PA2_PA3, /**< - Timer 2 partial remapping 1 (CH1 and ETR on PA15, CH2 on PB3, CH3 - on PA2, CH4 on PA3) */ - AFIO_REMAP_TIM2_PARTIAL_2 = AFIO_MAPR_TIM2_REMAP_PA0_PA1_PB10_PB11, /**< - Timer 2 partial remapping 2 (CH1 and ETR on PA0, CH2 on PA1, CH3 - on PB10, CH4 on PB11) */ - AFIO_REMAP_TIM2_FULL = AFIO_MAPR_TIM2_REMAP_FULL, /**< - Timer 2 full remapping */ - AFIO_REMAP_USART2 = AFIO_MAPR_USART2_REMAP, /**< - USART 2 remapping */ - AFIO_REMAP_USART1 = AFIO_MAPR_USART1_REMAP, /**< - USART 1 remapping */ - AFIO_REMAP_I2C1 = AFIO_MAPR_I2C1_REMAP, /**< - I2C 1 remapping */ - AFIO_REMAP_SPI1 = AFIO_MAPR_SPI1_REMAP, /**< - SPI 1 remapping */ - AFIO_REMAP_FSMC_NADV = (AFIO_MAPR2_FSMC_NADV | - AFIO_REMAP_USE_MAPR2), /**< - NADV signal not connected */ - AFIO_REMAP_TIM14 = (AFIO_MAPR2_TIM14_REMAP | - AFIO_REMAP_USE_MAPR2), /**< - Timer 14 remapping */ - AFIO_REMAP_TIM13 = (AFIO_MAPR2_TIM13_REMAP | - AFIO_REMAP_USE_MAPR2), /**< - Timer 13 remapping */ - AFIO_REMAP_TIM11 = (AFIO_MAPR2_TIM11_REMAP | - AFIO_REMAP_USE_MAPR2), /**< - Timer 11 remapping */ - AFIO_REMAP_TIM10 = (AFIO_MAPR2_TIM10_REMAP | - AFIO_REMAP_USE_MAPR2), /**< - Timer 10 remapping */ - AFIO_REMAP_TIM9 = (AFIO_MAPR2_TIM9_REMAP | - AFIO_REMAP_USE_MAPR2) /**< - Timer 9 */ -} afio_remap_peripheral; - -void afio_remap(afio_remap_peripheral p); - -/** - * @brief Debug port configuration - * - * Used to configure the behavior of JTAG and Serial Wire (SW) debug - * ports and their associated GPIO pins. - * - * @see afio_cfg_debug_ports() - */ -typedef enum afio_debug_cfg { - AFIO_DEBUG_FULL_SWJ = AFIO_MAPR_SWJ_CFG_FULL_SWJ, /**< - Full Serial Wire and JTAG debug */ - AFIO_DEBUG_FULL_SWJ_NO_NJRST = AFIO_MAPR_SWJ_CFG_FULL_SWJ_NO_NJRST, /**< - Full Serial Wire and JTAG, but no NJTRST. */ - AFIO_DEBUG_SW_ONLY = AFIO_MAPR_SWJ_CFG_NO_JTAG_SW, /**< - Serial Wire debug only (JTAG-DP disabled, - SW-DP enabled) */ - AFIO_DEBUG_NONE = AFIO_MAPR_SWJ_CFG_NO_JTAG_NO_SW /**< - No debug; all JTAG and SW pins are free - for use as GPIOs. */ -} afio_debug_cfg; - -/** - * @brief Enable or disable the JTAG and SW debug ports. - * @param config Desired debug port configuration - * @see afio_debug_cfg - */ -static inline void afio_cfg_debug_ports(afio_debug_cfg config) { - __io uint32 *mapr = &AFIO_BASE->MAPR; - *mapr = (*mapr & ~AFIO_MAPR_SWJ_CFG) | config; -} - #ifdef __cplusplus } #endif diff --git a/libmaple/stm32f1/gpio.c b/libmaple/stm32f1/gpio.c new file mode 100644 index 0000000..01a4028 --- /dev/null +++ b/libmaple/stm32f1/gpio.c @@ -0,0 +1,184 @@ +/****************************************************************************** + * 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 libmaple/stm32f1/gpio.c + * @brief GPIO support for STM32F1 line. + */ + +#include <libmaple/gpio.h> +#include <libmaple/rcc.h> + +/* + * GPIO devices + */ + +gpio_dev gpioa = { + .regs = GPIOA_BASE, + .clk_id = RCC_GPIOA, + .exti_port = AFIO_EXTI_PA, +}; +/** GPIO port A device. */ +gpio_dev* const GPIOA = &gpioa; + +gpio_dev gpiob = { + .regs = GPIOB_BASE, + .clk_id = RCC_GPIOB, + .exti_port = AFIO_EXTI_PB, +}; +/** GPIO port B device. */ +gpio_dev* const GPIOB = &gpiob; + +gpio_dev gpioc = { + .regs = GPIOC_BASE, + .clk_id = RCC_GPIOC, + .exti_port = AFIO_EXTI_PC, +}; +/** GPIO port C device. */ +gpio_dev* const GPIOC = &gpioc; + +gpio_dev gpiod = { + .regs = GPIOD_BASE, + .clk_id = RCC_GPIOD, + .exti_port = AFIO_EXTI_PD, +}; +/** GPIO port D device. */ +gpio_dev* const GPIOD = &gpiod; + +#ifdef STM32_HIGH_DENSITY +gpio_dev gpioe = { + .regs = GPIOE_BASE, + .clk_id = RCC_GPIOE, + .exti_port = AFIO_EXTI_PE, +}; +/** GPIO port E device. */ +gpio_dev* const GPIOE = &gpioe; + +gpio_dev gpiof = { + .regs = GPIOF_BASE, + .clk_id = RCC_GPIOF, + .exti_port = AFIO_EXTI_PF, +}; +/** GPIO port F device. */ +gpio_dev* const GPIOF = &gpiof; + +gpio_dev gpiog = { + .regs = GPIOG_BASE, + .clk_id = RCC_GPIOG, + .exti_port = AFIO_EXTI_PG, +}; +/** GPIO port G device. */ +gpio_dev* const GPIOG = &gpiog; +#endif + +/* + * GPIO routines + */ + +/** + * Initialize and reset all available GPIO devices. + */ +void gpio_init_all(void) { + gpio_init(GPIOA); + gpio_init(GPIOB); + gpio_init(GPIOC); + gpio_init(GPIOD); +#ifdef STM32_HIGH_DENSITY + gpio_init(GPIOE); + gpio_init(GPIOF); + gpio_init(GPIOG); +#endif +} + +/** + * Set the mode of a GPIO pin. + * + * @param dev GPIO device. + * @param pin Pin on the device whose mode to set, 0--15. + * @param mode General purpose or alternate function mode to set the pin to. + * @see gpio_pin_mode + */ +void gpio_set_mode(gpio_dev *dev, uint8 pin, gpio_pin_mode mode) { + gpio_reg_map *regs = dev->regs; + __io uint32 *cr = ®s->CRL + (pin >> 3); + uint32 shift = (pin & 0x7) * 4; + uint32 tmp = *cr; + + tmp &= ~(0xF << shift); + tmp |= (mode == GPIO_INPUT_PU ? GPIO_INPUT_PD : mode) << shift; + *cr = tmp; + + if (mode == GPIO_INPUT_PD) { + regs->ODR &= ~BIT(pin); + } else if (mode == GPIO_INPUT_PU) { + regs->ODR |= BIT(pin); + } +} + +/* + * AFIO + */ + +/** + * @brief Initialize the AFIO clock, and reset the AFIO registers. + */ +void afio_init(void) { + rcc_clk_enable(RCC_AFIO); + rcc_reset_dev(RCC_AFIO); +} + +#define AFIO_EXTI_SEL_MASK 0xF + +/** + * @brief Select a source input for an external interrupt. + * + * @param exti External interrupt. + * @param gpio_port Port which contains pin to use as source input. + * @see afio_exti_num + * @see afio_exti_port + */ +void afio_exti_select(afio_exti_num exti, afio_exti_port gpio_port) { + __io uint32 *exti_cr = &AFIO_BASE->EXTICR1 + exti / 4; + uint32 shift = 4 * (exti % 4); + uint32 cr = *exti_cr; + + cr &= ~(AFIO_EXTI_SEL_MASK << shift); + cr |= gpio_port << shift; + *exti_cr = cr; +} + +/** + * @brief Perform an alternate function remap. + * @param remapping Remapping to perform. + */ +void afio_remap(afio_remap_peripheral remapping) { + if (remapping & AFIO_REMAP_USE_MAPR2) { + remapping &= ~AFIO_REMAP_USE_MAPR2; + AFIO_BASE->MAPR2 |= remapping; + } else { + AFIO_BASE->MAPR |= remapping; + } +} diff --git a/libmaple/stm32f1/include/family/gpio.h b/libmaple/stm32f1/include/family/gpio.h new file mode 100644 index 0000000..c10244d --- /dev/null +++ b/libmaple/stm32f1/include/family/gpio.h @@ -0,0 +1,479 @@ +/****************************************************************************** + * The MIT License + * + * Copyright (c) 2010 Perry Hung. + * Copyright (c) 2011 LeafLabs, LLC. + * + * 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 libmaple/stm32f1/gpio.h + * @brief General purpose I/O (GPIO) and Alternate Function I/O + * (AFIO) prototypes, defines, and inlined access functions. + */ + +#ifndef _LIBMAPLE_STM32F1_GPIO_H_ +#define _LIBMAPLE_STM32F1_GPIO_H_ + +#ifdef __cplusplus +extern "C"{ +#endif + +#include <libmaple/libmaple.h> +#include <libmaple/rcc.h> + +/* + * 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; + +/** + * @brief 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_port { + AFIO_EXTI_PA, /**< Use port A (PAx) pin. */ + AFIO_EXTI_PB, /**< Use port B (PBx) pin. */ + AFIO_EXTI_PC, /**< Use port C (PCx) pin. */ + AFIO_EXTI_PD, /**< Use port D (PDx) pin. */ +#ifdef STM32_HIGH_DENSITY + AFIO_EXTI_PE, /**< Use port E (PEx) pin. */ + AFIO_EXTI_PF, /**< Use port F (PFx) pin. */ + AFIO_EXTI_PG, /**< Use port G (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 ((struct gpio_reg_map*)0x40010800) +/** GPIO port B register map base pointer */ +#define GPIOB_BASE ((struct gpio_reg_map*)0x40010C00) +/** GPIO port C register map base pointer */ +#define GPIOC_BASE ((struct gpio_reg_map*)0x40011000) +/** GPIO port D register map base pointer */ +#define GPIOD_BASE ((struct gpio_reg_map*)0x40011400) +#ifdef STM32_HIGH_DENSITY +/** GPIO port E register map base pointer */ +#define GPIOE_BASE ((struct gpio_reg_map*)0x40011800) +/** GPIO port F register map base pointer */ +#define GPIOF_BASE ((struct gpio_reg_map*)0x40011C00) +/** GPIO port G register map base pointer */ +#define GPIOG_BASE ((struct gpio_reg_map*)0x40012000) +#endif + +/* + * GPIO register bit definitions + */ + +/* Control registers, low and high */ + +#define GPIO_CR_CNF (0x3 << 2) +#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 0x3 +#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 + +/** + * @brief 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; + +/** + * @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; +} + +/* + * 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 ((struct 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_CFG (0x7 << 24) +#define AFIO_MAPR_SWJ_CFG_FULL_SWJ (0x0 << 24) +#define AFIO_MAPR_SWJ_CFG_FULL_SWJ_NO_NJRST (0x1 << 24) +#define AFIO_MAPR_SWJ_CFG_NO_JTAG_SW (0x2 << 24) +#define AFIO_MAPR_SWJ_CFG_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 (0x3 << 13) +#define AFIO_MAPR_CAN_REMAP_NONE (0x0 << 13) +#define AFIO_MAPR_CAN_REMAP_PB8_PB9 (0x2 << 13) +#define AFIO_MAPR_CAN_REMAP_PD0_PD1 (0x3 << 13) +#define AFIO_MAPR_TIM4_REMAP BIT(12) +#define AFIO_MAPR_TIM3_REMAP (0x3 << 10) +#define AFIO_MAPR_TIM3_REMAP_NONE (0x0 << 10) +#define AFIO_MAPR_TIM3_REMAP_PARTIAL (0x2 << 10) +#define AFIO_MAPR_TIM3_REMAP_FULL (0x3 << 10) +#define AFIO_MAPR_TIM2_REMAP (0x3 << 8) +#define AFIO_MAPR_TIM2_REMAP_NONE (0x0 << 8) +#define AFIO_MAPR_TIM2_REMAP_PA15_PB3_PA2_PA3 (0x1 << 8) +#define AFIO_MAPR_TIM2_REMAP_PA0_PA1_PB10_PB11 (0x2 << 8) +#define AFIO_MAPR_TIM2_REMAP_FULL (0x3 << 8) +#define AFIO_MAPR_TIM1_REMAP (0x3 << 6) +#define AFIO_MAPR_TIM1_REMAP_NONE (0x0 << 6) +#define AFIO_MAPR_TIM1_REMAP_PARTIAL (0x1 << 6) +#define AFIO_MAPR_TIM1_REMAP_FULL (0x3 << 6) +#define AFIO_MAPR_USART3_REMAP (0x3 << 4) +#define AFIO_MAPR_USART3_REMAP_NONE (0x0 << 4) +#define AFIO_MAPR_USART3_REMAP_PARTIAL (0x1 << 4) +#define AFIO_MAPR_USART3_REMAP_FULL (0x3 << 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 register 1 */ + +#define AFIO_EXTICR1_EXTI3 (0xF << 12) +#define AFIO_EXTICR1_EXTI3_PA (0x0 << 12) +#define AFIO_EXTICR1_EXTI3_PB (0x1 << 12) +#define AFIO_EXTICR1_EXTI3_PC (0x2 << 12) +#define AFIO_EXTICR1_EXTI3_PD (0x3 << 12) +#define AFIO_EXTICR1_EXTI3_PE (0x4 << 12) +#define AFIO_EXTICR1_EXTI3_PF (0x5 << 12) +#define AFIO_EXTICR1_EXTI3_PG (0x6 << 12) +#define AFIO_EXTICR1_EXTI2 (0xF << 8) +#define AFIO_EXTICR1_EXTI2_PA (0x0 << 8) +#define AFIO_EXTICR1_EXTI2_PB (0x1 << 8) +#define AFIO_EXTICR1_EXTI2_PC (0x2 << 8) +#define AFIO_EXTICR1_EXTI2_PD (0x3 << 8) +#define AFIO_EXTICR1_EXTI2_PE (0x4 << 8) +#define AFIO_EXTICR1_EXTI2_PF (0x5 << 8) +#define AFIO_EXTICR1_EXTI2_PG (0x6 << 8) +#define AFIO_EXTICR1_EXTI1 (0xF << 4) +#define AFIO_EXTICR1_EXTI1_PA (0x0 << 4) +#define AFIO_EXTICR1_EXTI1_PB (0x1 << 4) +#define AFIO_EXTICR1_EXTI1_PC (0x2 << 4) +#define AFIO_EXTICR1_EXTI1_PD (0x3 << 4) +#define AFIO_EXTICR1_EXTI1_PE (0x4 << 4) +#define AFIO_EXTICR1_EXTI1_PF (0x5 << 4) +#define AFIO_EXTICR1_EXTI1_PG (0x6 << 4) +#define AFIO_EXTICR1_EXTI0 0xF +#define AFIO_EXTICR1_EXTI0_PA 0x0 +#define AFIO_EXTICR1_EXTI0_PB 0x1 +#define AFIO_EXTICR1_EXTI0_PC 0x2 +#define AFIO_EXTICR1_EXTI0_PD 0x3 +#define AFIO_EXTICR1_EXTI0_PE 0x4 +#define AFIO_EXTICR1_EXTI0_PF 0x5 +#define AFIO_EXTICR1_EXTI0_PG 0x6 + +/* External interrupt configuration register 2 */ + +#define AFIO_EXTICR2_EXTI7 (0xF << 12) +#define AFIO_EXTICR2_EXTI7_PA (0x0 << 12) +#define AFIO_EXTICR2_EXTI7_PB (0x1 << 12) +#define AFIO_EXTICR2_EXTI7_PC (0x2 << 12) +#define AFIO_EXTICR2_EXTI7_PD (0x3 << 12) +#define AFIO_EXTICR2_EXTI7_PE (0x4 << 12) +#define AFIO_EXTICR2_EXTI7_PF (0x5 << 12) +#define AFIO_EXTICR2_EXTI7_PG (0x6 << 12) +#define AFIO_EXTICR2_EXTI6 (0xF << 8) +#define AFIO_EXTICR2_EXTI6_PA (0x0 << 8) +#define AFIO_EXTICR2_EXTI6_PB (0x1 << 8) +#define AFIO_EXTICR2_EXTI6_PC (0x2 << 8) +#define AFIO_EXTICR2_EXTI6_PD (0x3 << 8) +#define AFIO_EXTICR2_EXTI6_PE (0x4 << 8) +#define AFIO_EXTICR2_EXTI6_PF (0x5 << 8) +#define AFIO_EXTICR2_EXTI6_PG (0x6 << 8) +#define AFIO_EXTICR2_EXTI5 (0xF << 4) +#define AFIO_EXTICR2_EXTI5_PA (0x0 << 4) +#define AFIO_EXTICR2_EXTI5_PB (0x1 << 4) +#define AFIO_EXTICR2_EXTI5_PC (0x2 << 4) +#define AFIO_EXTICR2_EXTI5_PD (0x3 << 4) +#define AFIO_EXTICR2_EXTI5_PE (0x4 << 4) +#define AFIO_EXTICR2_EXTI5_PF (0x5 << 4) +#define AFIO_EXTICR2_EXTI5_PG (0x6 << 4) +#define AFIO_EXTICR2_EXTI4 0xF +#define AFIO_EXTICR2_EXTI4_PA 0x0 +#define AFIO_EXTICR2_EXTI4_PB 0x1 +#define AFIO_EXTICR2_EXTI4_PC 0x2 +#define AFIO_EXTICR2_EXTI4_PD 0x3 +#define AFIO_EXTICR2_EXTI4_PE 0x4 +#define AFIO_EXTICR2_EXTI4_PF 0x5 +#define AFIO_EXTICR2_EXTI4_PG 0x6 + +/* 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); + +/** + * External interrupt line numbers. + */ +typedef enum afio_exti_num { + 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; + +void afio_exti_select(afio_exti_num exti, afio_exti_port gpio_port); + +/* HACK: Use upper bit to denote MAPR2, Bit 31 is reserved and + * not used in either MAPR or MAPR2 */ +#define AFIO_REMAP_USE_MAPR2 (1 << 31) + +/** + * @brief Available peripheral remaps. + * @see afio_remap() + */ +typedef enum afio_remap_peripheral { + AFIO_REMAP_ADC2_ETRGREG = AFIO_MAPR_ADC2_ETRGREG_REMAP, /**< + ADC 2 external trigger regular conversion remapping */ + AFIO_REMAP_ADC2_ETRGINJ = AFIO_MAPR_ADC2_ETRGINJ_REMAP, /**< + ADC 2 external trigger injected conversion remapping */ + AFIO_REMAP_ADC1_ETRGREG = AFIO_MAPR_ADC1_ETRGREG_REMAP, /**< + ADC 1 external trigger regular conversion remapping */ + AFIO_REMAP_ADC1_ETRGINJ = AFIO_MAPR_ADC1_ETRGINJ_REMAP, /**< + ADC 1 external trigger injected conversion remapping */ + AFIO_REMAP_TIM5CH4_I = AFIO_MAPR_TIM5CH4_IREMAP, /**< + Timer 5 channel 4 internal remapping */ + AFIO_REMAP_PD01 = AFIO_MAPR_PD01_REMAP, /**< + Port D0/Port D1 mapping on OSC_IN/OSC_OUT */ + AFIO_REMAP_CAN_1 = AFIO_MAPR_CAN_REMAP_PB8_PB9, /**< + CAN alternate function remapping 1 (RX on PB8, TX on PB9) */ + AFIO_REMAP_CAN_2 = AFIO_MAPR_CAN_REMAP_PD0_PD1, /**< + CAN alternate function remapping 2 (RX on PD0, TX on PD1) */ + AFIO_REMAP_TIM4 = AFIO_MAPR_TIM4_REMAP, /**< + Timer 4 remapping */ + AFIO_REMAP_TIM3_PARTIAL = AFIO_MAPR_TIM3_REMAP_PARTIAL, /**< + Timer 3 partial remapping */ + AFIO_REMAP_TIM3_FULL = AFIO_MAPR_TIM3_REMAP_FULL, /**< + Timer 3 full remapping */ + AFIO_REMAP_TIM2_PARTIAL_1 = AFIO_MAPR_TIM2_REMAP_PA15_PB3_PA2_PA3, /**< + Timer 2 partial remapping 1 (CH1 and ETR on PA15, CH2 on PB3, CH3 + on PA2, CH4 on PA3) */ + AFIO_REMAP_TIM2_PARTIAL_2 = AFIO_MAPR_TIM2_REMAP_PA0_PA1_PB10_PB11, /**< + Timer 2 partial remapping 2 (CH1 and ETR on PA0, CH2 on PA1, CH3 + on PB10, CH4 on PB11) */ + AFIO_REMAP_TIM2_FULL = AFIO_MAPR_TIM2_REMAP_FULL, /**< + Timer 2 full remapping */ + AFIO_REMAP_USART2 = AFIO_MAPR_USART2_REMAP, /**< + USART 2 remapping */ + AFIO_REMAP_USART1 = AFIO_MAPR_USART1_REMAP, /**< + USART 1 remapping */ + AFIO_REMAP_I2C1 = AFIO_MAPR_I2C1_REMAP, /**< + I2C 1 remapping */ + AFIO_REMAP_SPI1 = AFIO_MAPR_SPI1_REMAP, /**< + SPI 1 remapping */ + AFIO_REMAP_FSMC_NADV = (AFIO_MAPR2_FSMC_NADV | + AFIO_REMAP_USE_MAPR2), /**< + NADV signal not connected */ + AFIO_REMAP_TIM14 = (AFIO_MAPR2_TIM14_REMAP | + AFIO_REMAP_USE_MAPR2), /**< + Timer 14 remapping */ + AFIO_REMAP_TIM13 = (AFIO_MAPR2_TIM13_REMAP | + AFIO_REMAP_USE_MAPR2), /**< + Timer 13 remapping */ + AFIO_REMAP_TIM11 = (AFIO_MAPR2_TIM11_REMAP | + AFIO_REMAP_USE_MAPR2), /**< + Timer 11 remapping */ + AFIO_REMAP_TIM10 = (AFIO_MAPR2_TIM10_REMAP | + AFIO_REMAP_USE_MAPR2), /**< + Timer 10 remapping */ + AFIO_REMAP_TIM9 = (AFIO_MAPR2_TIM9_REMAP | + AFIO_REMAP_USE_MAPR2) /**< + Timer 9 */ +} afio_remap_peripheral; + +void afio_remap(afio_remap_peripheral p); + +/** + * @brief Debug port configuration + * + * Used to configure the behavior of JTAG and Serial Wire (SW) debug + * ports and their associated GPIO pins. + * + * @see afio_cfg_debug_ports() + */ +typedef enum afio_debug_cfg { + AFIO_DEBUG_FULL_SWJ = AFIO_MAPR_SWJ_CFG_FULL_SWJ, /**< + Full Serial Wire and JTAG debug */ + AFIO_DEBUG_FULL_SWJ_NO_NJRST = AFIO_MAPR_SWJ_CFG_FULL_SWJ_NO_NJRST, /**< + Full Serial Wire and JTAG, but no NJTRST. */ + AFIO_DEBUG_SW_ONLY = AFIO_MAPR_SWJ_CFG_NO_JTAG_SW, /**< + Serial Wire debug only (JTAG-DP disabled, + SW-DP enabled) */ + AFIO_DEBUG_NONE = AFIO_MAPR_SWJ_CFG_NO_JTAG_NO_SW /**< + No debug; all JTAG and SW pins are free + for use as GPIOs. */ +} afio_debug_cfg; + +/** + * @brief Enable or disable the JTAG and SW debug ports. + * @param config Desired debug port configuration + * @see afio_debug_cfg + */ +static inline void afio_cfg_debug_ports(afio_debug_cfg config) { + __io uint32 *mapr = &AFIO_BASE->MAPR; + *mapr = (*mapr & ~AFIO_MAPR_SWJ_CFG) | config; +} + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/libmaple/stm32f1/rules.mk b/libmaple/stm32f1/rules.mk index 2bdc423..03d2f95 100644 --- a/libmaple/stm32f1/rules.mk +++ b/libmaple/stm32f1/rules.mk @@ -13,6 +13,7 @@ sSRCS_$(d) := isrs_performance.S \ cSRCS_$(d) := rcc.c cSRCS_$(d) += flash.c +cSRCS_$(d) += gpio.c sFILES_$(d) := $(sSRCS_$(d):%=$(d)/%) cFILES_$(d) := $(cSRCS_$(d):%=$(d)/%) |