mbed library sources
Dependents: frdm_kl05z_gpio_test
Fork of mbed-src by
Diff: targets/hal/TARGET_STM/TARGET_NUCLEO_F072RB/port_api.c
- Revision:
- 219:993c9b0acbcc
- Child:
- 250:a49055e7a707
diff -r 44081b78fdc2 -r 993c9b0acbcc targets/hal/TARGET_STM/TARGET_NUCLEO_F072RB/port_api.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/hal/TARGET_STM/TARGET_NUCLEO_F072RB/port_api.c Mon Jun 02 09:45:07 2014 +0100 @@ -0,0 +1,97 @@ +/* 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" +#include "error.h" + +#if DEVICE_PORTIN || DEVICE_PORTOUT + +extern uint32_t Set_GPIO_Clock(uint32_t port_idx); + +// 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; + + // Enable GPIO clock + uint32_t gpio_add = Set_GPIO_Clock(port_index); + GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add; + + // 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(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0)); + } else { // PIN_INPUT + pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 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