/* * File : gpio.c * This file is part of RT-Thread RTOS * COPYRIGHT (C) 2015, RT-Thread Development Team * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://www.rt-thread.org/license/LICENSE * * Change Logs: * Date Author Notes * 2015-03-24 Bright the first version */ #include #include #include #ifdef RT_USING_PIN #define STM32F10X_PIN_NUMBERS 100 #define __STM32_PIN(index, rcc, gpio, gpio_index) { 0, RCC_##rcc##Periph_GPIO##gpio, GPIO##gpio, GPIO_Pin_##gpio_index} #define __STM32_PIN_DEFAULT {-1, 0, 0, 0} /* STM32 GPIO driver */ struct pin_index { int index; uint32_t rcc; GPIO_TypeDef *gpio; uint32_t pin; }; static const struct pin_index pins[] = { #if (STM32F10X_PIN_NUMBERS == 100) __STM32_PIN_DEFAULT, __STM32_PIN(1, APB2, E, 2), __STM32_PIN(2, APB2, E, 3), __STM32_PIN(3, APB2, E, 4), __STM32_PIN(4, APB2, E, 5), __STM32_PIN(5, APB2, E, 6), __STM32_PIN_DEFAULT, __STM32_PIN(7, APB2, C, 13), __STM32_PIN(8, APB2, C, 14), __STM32_PIN(9, APB2, C, 15), __STM32_PIN_DEFAULT, __STM32_PIN_DEFAULT, __STM32_PIN_DEFAULT, __STM32_PIN_DEFAULT, __STM32_PIN_DEFAULT, __STM32_PIN(15, APB2, C, 0), __STM32_PIN(16, APB2, C, 1), __STM32_PIN(17, APB2, C, 2), __STM32_PIN(18, APB2, C, 3), __STM32_PIN_DEFAULT, __STM32_PIN_DEFAULT, __STM32_PIN_DEFAULT, __STM32_PIN_DEFAULT, __STM32_PIN(23, APB2, A, 0), __STM32_PIN(24, APB2, A, 1), __STM32_PIN(25, APB2, A, 2), __STM32_PIN(26, APB2, A, 3), __STM32_PIN_DEFAULT, __STM32_PIN_DEFAULT, __STM32_PIN(29, APB2, A, 4), __STM32_PIN(30, APB2, A, 5), __STM32_PIN(31, APB2, A, 6), __STM32_PIN(32, APB2, A, 7), __STM32_PIN(33, APB2, C, 4), __STM32_PIN(34, APB2, C, 5), __STM32_PIN(35, APB2, B, 0), __STM32_PIN(36, APB2, B, 1), __STM32_PIN(37, APB2, B, 2), __STM32_PIN(38, APB2, E, 7), __STM32_PIN(39, APB2, E, 8), __STM32_PIN(40, APB2, E, 9), __STM32_PIN(41, APB2, E, 10), __STM32_PIN(42, APB2, E, 11), __STM32_PIN(43, APB2, E, 12), __STM32_PIN(44, APB2, E, 13), __STM32_PIN(45, APB2, E, 14), __STM32_PIN(46, APB2, E, 15), __STM32_PIN(47, APB2, B, 10), __STM32_PIN(48, APB2, B, 11), __STM32_PIN_DEFAULT, __STM32_PIN_DEFAULT, __STM32_PIN(51, APB2, B, 12), __STM32_PIN(52, APB2, B, 13), __STM32_PIN(53, APB2, B, 14), __STM32_PIN(54, APB2, B, 15), __STM32_PIN(55, APB2, D, 8), __STM32_PIN(56, APB2, D, 9), __STM32_PIN(57, APB2, D, 10), __STM32_PIN(58, APB2, D, 11), __STM32_PIN(59, APB2, D, 12), __STM32_PIN(60, APB2, D, 13), __STM32_PIN(61, APB2, D, 14), __STM32_PIN(62, APB2, D, 15), __STM32_PIN(63, APB2, C, 6), __STM32_PIN(64, APB2, C, 7), __STM32_PIN(65, APB2, C, 8), __STM32_PIN(66, APB2, C, 9), __STM32_PIN(67, APB2, A, 8), __STM32_PIN(68, APB2, A, 9), __STM32_PIN(69, APB2, A, 10), __STM32_PIN(70, APB2, A, 11), __STM32_PIN(71, APB2, A, 12), __STM32_PIN(72, APB2, A, 13), __STM32_PIN_DEFAULT, __STM32_PIN_DEFAULT, __STM32_PIN_DEFAULT, __STM32_PIN(76, APB2, A, 14), __STM32_PIN(77, APB2, A, 15), __STM32_PIN(78, APB2, C, 10), __STM32_PIN(79, APB2, C, 11), __STM32_PIN(80, APB2, C, 12), __STM32_PIN(81, APB2, D, 0), __STM32_PIN(82, APB2, D, 1), __STM32_PIN(83, APB2, D, 2), __STM32_PIN(84, APB2, D, 3), __STM32_PIN(85, APB2, D, 4), __STM32_PIN(86, APB2, D, 5), __STM32_PIN(87, APB2, D, 6), __STM32_PIN(88, APB2, D, 7), __STM32_PIN(89, APB2, B, 3), __STM32_PIN(90, APB2, B, 4), __STM32_PIN(91, APB2, B, 5), __STM32_PIN(92, APB2, B, 6), __STM32_PIN(93, APB2, B, 7), __STM32_PIN_DEFAULT, __STM32_PIN(95, APB2, B, 8), __STM32_PIN(96, APB2, B, 9), __STM32_PIN(97, APB2, E, 0), __STM32_PIN(98, APB2, E, 1), __STM32_PIN_DEFAULT, __STM32_PIN_DEFAULT, #endif }; #define ITEM_NUM(items) sizeof(items)/sizeof(items[0]) const struct pin_index *get_pin(uint8_t pin) { const struct pin_index *index; if (pin < ITEM_NUM(pins)) { index = &pins[pin]; if (index->index == -1) index = RT_NULL; } else { index = RT_NULL; } return index; }; void stm32_pin_write(rt_device_t dev, rt_base_t pin, rt_base_t value) { const struct pin_index *index; index = get_pin(pin); if (index == RT_NULL) { return; } if (value == PIN_LOW) { GPIO_ResetBits(index->gpio, index->pin); } else { GPIO_SetBits(index->gpio, index->pin); } } int stm32_pin_read(rt_device_t dev, rt_base_t pin) { int value; const struct pin_index *index; value = PIN_LOW; index = get_pin(pin); if (index == RT_NULL) { return value; } if (GPIO_ReadInputDataBit(index->gpio, index->pin) == Bit_RESET) { value = PIN_LOW; } else { value = PIN_HIGH; } return value; } void stm32_pin_mode(rt_device_t dev, rt_base_t pin, rt_base_t mode) { const struct pin_index *index; GPIO_InitTypeDef GPIO_InitStructure; index = get_pin(pin); if (index == RT_NULL) { return; } /* GPIO Periph clock enable */ RCC_APB2PeriphClockCmd(index->rcc, ENABLE); /* Configure GPIO_InitStructure */ GPIO_InitStructure.GPIO_Pin = index->pin; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; if (mode == PIN_MODE_OUTPUT) { /* output setting */ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; } else if (mode == PIN_MODE_INPUT) { /* input setting: not pull. */ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; } else if (mode == PIN_MODE_INPUT_PULLUP) { /* input setting: pull up. */ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; } else { /* input setting:default. */ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; } GPIO_Init(index->gpio, &GPIO_InitStructure); } const static struct rt_pin_ops _stm32_pin_ops = { stm32_pin_mode, stm32_pin_write, stm32_pin_read, }; int stm32_hw_pin_init(void) { int result; result = rt_device_pin_register("pin", &_stm32_pin_ops, RT_NULL); return result; } INIT_BOARD_EXPORT(stm32_hw_pin_init); #endif