- fix F411 F334 systeminit when HSI used - portinout always read IDR regardless of port direction
Fork of mbed-src by
Diff: targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/port_api.c
- Revision:
- 52:a51c77007319
- Child:
- 70:c1fbde68b492
diff -r 7838415c99e7 -r a51c77007319 targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/port_api.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/port_api.c Mon Dec 02 11:30:05 2013 +0000 @@ -0,0 +1,85 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2013 ARM Limited + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#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