USB Serial application
Fork of USBSerial_HelloWorld by
Diff: mbed-dev/targets/TARGET_STM/TARGET_STM32F4/pinmap.c
- Revision:
- 10:41552d038a69
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-dev/targets/TARGET_STM/TARGET_STM32F4/pinmap.c Tue Jan 10 20:42:26 2017 +0000 @@ -0,0 +1,197 @@ +/* mbed Microcontroller Library + ******************************************************************************* + * Copyright (c) 2015, STMicroelectronics + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. Neither the name of STMicroelectronics nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + ******************************************************************************* + */ +#include "mbed_assert.h" +#include "pinmap.h" +#include "PortNames.h" +#include "mbed_error.h" + +// GPIO mode look-up table +static const uint32_t gpio_mode[13] = { + 0x00000000, // 0 = GPIO_MODE_INPUT + 0x00000001, // 1 = GPIO_MODE_OUTPUT_PP + 0x00000011, // 2 = GPIO_MODE_OUTPUT_OD + 0x00000002, // 3 = GPIO_MODE_AF_PP + 0x00000012, // 4 = GPIO_MODE_AF_OD + 0x00000003, // 5 = GPIO_MODE_ANALOG + 0x10110000, // 6 = GPIO_MODE_IT_RISING + 0x10210000, // 7 = GPIO_MODE_IT_FALLING + 0x10310000, // 8 = GPIO_MODE_IT_RISING_FALLING + 0x10120000, // 9 = GPIO_MODE_EVT_RISING + 0x10220000, // 10 = GPIO_MODE_EVT_FALLING + 0x10320000, // 11 = GPIO_MODE_EVT_RISING_FALLING + 0x10000000 // 12 = Reset GPIO_MODE_IT_EVT +}; + +// Enable GPIO clock and return GPIO base address +uint32_t Set_GPIO_Clock(uint32_t port_idx) +{ + uint32_t gpio_add = 0; + switch (port_idx) { + case PortA: + gpio_add = GPIOA_BASE; + __GPIOA_CLK_ENABLE(); + break; + case PortB: + gpio_add = GPIOB_BASE; + __GPIOB_CLK_ENABLE(); + break; + case PortC: + gpio_add = GPIOC_BASE; + __GPIOC_CLK_ENABLE(); + break; +#if defined GPIOD_BASE + case PortD: + gpio_add = GPIOD_BASE; + __GPIOD_CLK_ENABLE(); + break; +#endif +#if defined GPIOE_BASE + case PortE: + gpio_add = GPIOE_BASE; + __GPIOE_CLK_ENABLE(); + break; +#endif +#if defined GPIOF_BASE + case PortF: + gpio_add = GPIOF_BASE; + __GPIOF_CLK_ENABLE(); + break; +#endif +#if defined GPIOG_BASE + case PortG: + gpio_add = GPIOG_BASE; + __GPIOG_CLK_ENABLE(); + break; +#endif +#if defined GPIOH_BASE + case PortH: + gpio_add = GPIOH_BASE; + __GPIOH_CLK_ENABLE(); + break; +#endif +#if defined GPIOI_BASE + case PortI: + gpio_add = GPIOI_BASE; + __GPIOI_CLK_ENABLE(); + break; +#endif +#if defined GPIOJ_BASE + case PortJ: + gpio_add = GPIOJ_BASE; + __GPIOJ_CLK_ENABLE(); + break; +#endif +#if defined GPIOK_BASE + case PortK: + gpio_add = GPIOK_BASE; + __GPIOK_CLK_ENABLE(); + break; +#endif + default: + error("Pinmap error: wrong port number."); + break; + } + return gpio_add; +} + +/** + * Configure pin (mode, speed, output type and pull-up/pull-down) + */ +void pin_function(PinName pin, int data) +{ + MBED_ASSERT(pin != (PinName)NC); + // Get the pin informations + uint32_t mode = STM_PIN_MODE(data); + uint32_t pupd = STM_PIN_PUPD(data); + uint32_t afnum = STM_PIN_AFNUM(data); + + uint32_t port_index = STM_PORT(pin); + uint32_t pin_index = STM_PIN(pin); + + // Enable GPIO clock + uint32_t gpio_add = Set_GPIO_Clock(port_index); + GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add; + + // Configure GPIO + GPIO_InitTypeDef GPIO_InitStructure; + GPIO_InitStructure.Pin = (uint32_t)(1 << pin_index); + GPIO_InitStructure.Mode = gpio_mode[mode]; + GPIO_InitStructure.Pull = pupd; + GPIO_InitStructure.Speed = GPIO_SPEED_HIGH; + GPIO_InitStructure.Alternate = afnum; + HAL_GPIO_Init(gpio, &GPIO_InitStructure); + + // [TODO] Disconnect JTAG-DP + SW-DP signals. + // Warning: Need to reconnect under reset + //if ((pin == PA_13) || (pin == PA_14)) { + // + //} + //if ((pin == PA_15) || (pin == PB_3) || (pin == PB_4)) { + // + //} +} + +/** + * Configure pin pull-up/pull-down + */ +void pin_mode(PinName pin, PinMode mode) +{ + MBED_ASSERT(pin != (PinName)NC); + uint32_t port_index = STM_PORT(pin); + uint32_t pin_index = STM_PIN(pin); + + // Enable GPIO clock + uint32_t gpio_add = Set_GPIO_Clock(port_index); + GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add; + + // Configure pull-up/pull-down resistors + uint32_t pupd = (uint32_t)mode; + if (pupd > 2) { + pupd = 0; // Open-drain = No pull-up/No pull-down + } + gpio->PUPDR &= (uint32_t)(~(GPIO_PUPDR_PUPDR0 << (pin_index * 2))); + gpio->PUPDR |= (uint32_t)(pupd << (pin_index * 2)); +} + +/* Internal function for setting the gpiomode/function + * without changing Pull mode + */ +void pin_function_gpiomode(PinName pin, uint32_t gpiomode) { + + /* Read current pull state from HW to avoid over-write*/ + uint32_t port_index = STM_PORT(pin); + uint32_t pin_index = STM_PIN(pin); + GPIO_TypeDef *gpio = (GPIO_TypeDef *) Set_GPIO_Clock(port_index); + uint32_t temp = gpio->PUPDR; + uint32_t pull = (temp >> (pin_index * 2U)) & GPIO_PUPDR_PUPDR0; + + /* Then re-use global function for updating the mode part*/ + pin_function(pin, STM_PIN_DATA(gpiomode, pull, 0)); +}