mbed library sources
Dependents: frdm_kl05z_gpio_test
Fork of mbed-src by
targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/port_api.c
- Committer:
- mbed_official
- Date:
- 2014-01-07
- Revision:
- 70:c1fbde68b492
- Parent:
- 52:a51c77007319
- Child:
- 76:aeb1df146756
File content as of revision 70:c1fbde68b492:
/* mbed Microcontroller Library ******************************************************************************* * Copyright (c) 2014, 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 "port_api.h" #include "pinmap.h" #include "gpio_api.h" #if DEVICE_PORTIN || DEVICE_PORTOUT // high nibble = port number (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, ...) // low nibble = pin number PinName port_pin(PortName port, int pin_n) { return (PinName)(pin_n + (port << 4)); } void port_init(port_t *obj, PortName port, int mask, PinDirection dir) { uint32_t port_index = (uint32_t)port; // (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, ...) // Enable GPIO clock RCC_APB2PeriphClockCmd((RCC_APB2Periph_GPIOA << port_index), ENABLE); // Get GPIO structure base address GPIO_TypeDef *gpio = (GPIO_TypeDef *)(GPIOA_BASE + (port_index << 10)); // Fill PORT object structure for future use obj->port = port; obj->mask = mask; obj->direction = dir; obj->reg_in = &gpio->IDR; obj->reg_out = &gpio->ODR; port_dir(obj, dir); } void port_dir(port_t *obj, PinDirection dir) { uint32_t i; obj->direction = dir; for (i = 0; i < 16; i++) { // Process all pins if (obj->mask & (1 << i)) { // If the pin is used if (dir == PIN_OUTPUT) { pin_function(port_pin(obj->port, i), STM_PIN_DATA(GPIO_Mode_Out_PP, 0)); } else { // PIN_INPUT pin_function(port_pin(obj->port, i), STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0)); } } } } void port_mode(port_t *obj, PinMode mode) { uint32_t i; for (i = 0; i < 16; i++) { // Process all pins if (obj->mask & (1 << i)) { // If the pin is used pin_mode(port_pin(obj->port, i), mode); } } } void port_write(port_t *obj, int value) { *obj->reg_out = (*obj->reg_out & ~obj->mask) | (value & obj->mask); } int port_read(port_t *obj) { if (obj->direction == PIN_OUTPUT) { return (*obj->reg_out & obj->mask); } else { // PIN_INPUT return (*obj->reg_in & obj->mask); } } #endif