From bb657c68e77a1c597b45c35978e4c833739144e9 Mon Sep 17 00:00:00 2001 From: Marti Bolivar Date: Wed, 16 Nov 2011 18:49:52 -0500 Subject: Move GPIO support for STM32F1 to libmaple/stm32f1. Make a new family header, libmaple/stm32f1/include/family/gpio.h, and supporting libmaple/stm32f1/gpio.c. Beyond registers and devices, these also include anything mentioning AFIO, which doesn't exist on F2. Update libmaple/stm32f1/rules.mk for new gpio.c. Alter gpio_write_bit() to use dev->regs->BSRR only. BRRs are not present on STM32F2. Signed-off-by: Marti Bolivar --- libmaple/gpio.c | 151 +------------------------------------------------------- 1 file changed, 2 insertions(+), 149 deletions(-) (limited to 'libmaple/gpio.c') 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 #include /* - * 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; - } -} -- cgit v1.2.3