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targets/hal/TARGET_STM/TARGET_STM32F4XX/port_api.c@393:17d2d502961d, 2014-11-07 (annotated)
- Committer:
- mbed_official
- Date:
- Fri Nov 07 12:00:11 2014 +0000
- Revision:
- 393:17d2d502961d
- Parent:
- 20:4263a77256ae
Synchronized with git revision 78a3d4f2301aad7367e924e8231b4411d11038ea
Full URL: https://github.com/mbedmicro/mbed/commit/78a3d4f2301aad7367e924e8231b4411d11038ea/
Toolchain: NUCLEO_F0 - Add missing files for IAR exporter
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
bogdanm | 20:4263a77256ae | 1 | /* mbed Microcontroller Library |
bogdanm | 20:4263a77256ae | 2 | * Copyright (c) 2006-2013 ARM Limited |
bogdanm | 20:4263a77256ae | 3 | * |
bogdanm | 20:4263a77256ae | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
bogdanm | 20:4263a77256ae | 5 | * you may not use this file except in compliance with the License. |
bogdanm | 20:4263a77256ae | 6 | * You may obtain a copy of the License at |
bogdanm | 20:4263a77256ae | 7 | * |
bogdanm | 20:4263a77256ae | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
bogdanm | 20:4263a77256ae | 9 | * |
bogdanm | 20:4263a77256ae | 10 | * Unless required by applicable law or agreed to in writing, software |
bogdanm | 20:4263a77256ae | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
bogdanm | 20:4263a77256ae | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
bogdanm | 20:4263a77256ae | 13 | * See the License for the specific language governing permissions and |
bogdanm | 20:4263a77256ae | 14 | * limitations under the License. |
bogdanm | 20:4263a77256ae | 15 | */ |
bogdanm | 20:4263a77256ae | 16 | #include "port_api.h" |
bogdanm | 20:4263a77256ae | 17 | #include "pinmap.h" |
bogdanm | 20:4263a77256ae | 18 | #include "gpio_api.h" |
bogdanm | 20:4263a77256ae | 19 | |
bogdanm | 20:4263a77256ae | 20 | #if DEVICE_PORTIN || DEVICE_PORTOUT |
bogdanm | 20:4263a77256ae | 21 | |
bogdanm | 20:4263a77256ae | 22 | PinName port_pin(PortName port, int pin_n) { |
bogdanm | 20:4263a77256ae | 23 | return pin_n + (port << 4); |
bogdanm | 20:4263a77256ae | 24 | } |
bogdanm | 20:4263a77256ae | 25 | |
bogdanm | 20:4263a77256ae | 26 | void port_init(port_t *obj, PortName port, int mask, PinDirection dir) { |
bogdanm | 20:4263a77256ae | 27 | obj->port = port; |
bogdanm | 20:4263a77256ae | 28 | obj->mask = mask; |
bogdanm | 20:4263a77256ae | 29 | |
bogdanm | 20:4263a77256ae | 30 | uint32_t port_index = (uint32_t) port; |
bogdanm | 20:4263a77256ae | 31 | |
bogdanm | 20:4263a77256ae | 32 | GPIO_TypeDef *port_reg = (GPIO_TypeDef *)(GPIOA_BASE + (port_index << 10)); |
bogdanm | 20:4263a77256ae | 33 | // Enable GPIO peripheral clock |
bogdanm | 20:4263a77256ae | 34 | RCC->AHB1ENR |= 1 << port_index; |
bogdanm | 20:4263a77256ae | 35 | |
bogdanm | 20:4263a77256ae | 36 | obj->reg_mode = &port_reg->MODER; |
bogdanm | 20:4263a77256ae | 37 | obj->reg_set = &port_reg->BSRRH; |
bogdanm | 20:4263a77256ae | 38 | obj->reg_clr = &port_reg->BSRRL; |
bogdanm | 20:4263a77256ae | 39 | obj->reg_in = &port_reg->IDR; |
bogdanm | 20:4263a77256ae | 40 | obj->reg_out = &port_reg->ODR; |
bogdanm | 20:4263a77256ae | 41 | |
bogdanm | 20:4263a77256ae | 42 | port_dir(obj, dir); |
bogdanm | 20:4263a77256ae | 43 | } |
bogdanm | 20:4263a77256ae | 44 | |
bogdanm | 20:4263a77256ae | 45 | void port_mode(port_t *obj, PinMode mode) { |
bogdanm | 20:4263a77256ae | 46 | uint32_t i; |
bogdanm | 20:4263a77256ae | 47 | // The mode is set per pin: reuse pinmap logic |
bogdanm | 20:4263a77256ae | 48 | for (i=0; i<16; i++) { |
bogdanm | 20:4263a77256ae | 49 | if (obj->mask & (1<<i)) { |
bogdanm | 20:4263a77256ae | 50 | pin_mode(port_pin(obj->port, i), mode); |
bogdanm | 20:4263a77256ae | 51 | } |
bogdanm | 20:4263a77256ae | 52 | } |
bogdanm | 20:4263a77256ae | 53 | } |
bogdanm | 20:4263a77256ae | 54 | |
bogdanm | 20:4263a77256ae | 55 | void port_dir(port_t *obj, PinDirection dir) { |
bogdanm | 20:4263a77256ae | 56 | obj->direction = dir; |
bogdanm | 20:4263a77256ae | 57 | uint32_t tmp = *obj->reg_mode; |
bogdanm | 20:4263a77256ae | 58 | for (int i=0; i<16; i++) { |
bogdanm | 20:4263a77256ae | 59 | if (obj->mask & (1 << i)) { |
bogdanm | 20:4263a77256ae | 60 | // Clear the mode bits (i.e. set to input) |
bogdanm | 20:4263a77256ae | 61 | tmp &= ~(0x3 << (i << 1)); |
bogdanm | 20:4263a77256ae | 62 | if (dir == PIN_OUTPUT) { |
bogdanm | 20:4263a77256ae | 63 | // Set to output |
bogdanm | 20:4263a77256ae | 64 | tmp |= 0x1 << (i << 1); |
bogdanm | 20:4263a77256ae | 65 | } |
bogdanm | 20:4263a77256ae | 66 | } |
bogdanm | 20:4263a77256ae | 67 | } |
bogdanm | 20:4263a77256ae | 68 | *obj->reg_mode = tmp; |
bogdanm | 20:4263a77256ae | 69 | } |
bogdanm | 20:4263a77256ae | 70 | |
bogdanm | 20:4263a77256ae | 71 | void port_write(port_t *obj, int value) { |
bogdanm | 20:4263a77256ae | 72 | *obj->reg_out = (*obj->reg_out & ~obj->mask) | (value & obj->mask); |
bogdanm | 20:4263a77256ae | 73 | } |
bogdanm | 20:4263a77256ae | 74 | |
bogdanm | 20:4263a77256ae | 75 | int port_read(port_t *obj) { |
bogdanm | 20:4263a77256ae | 76 | switch (obj->direction) { |
bogdanm | 20:4263a77256ae | 77 | case PIN_OUTPUT: return *obj->reg_out & obj->mask; |
bogdanm | 20:4263a77256ae | 78 | case PIN_INPUT: return *obj->reg_in & obj->mask; |
bogdanm | 20:4263a77256ae | 79 | } |
bogdanm | 20:4263a77256ae | 80 | return 0; |
bogdanm | 20:4263a77256ae | 81 | } |
bogdanm | 20:4263a77256ae | 82 | |
bogdanm | 20:4263a77256ae | 83 | #endif |