Initial commit
mbed-dev-master/targets/TARGET_STM/port_api.c@0:bb348c97df44, 2020-09-16 (annotated)
- Committer:
- lypinator
- Date:
- Wed Sep 16 01:11:49 2020 +0000
- Revision:
- 0:bb348c97df44
Added PWM
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
lypinator | 0:bb348c97df44 | 1 | /* mbed Microcontroller Library |
lypinator | 0:bb348c97df44 | 2 | ******************************************************************************* |
lypinator | 0:bb348c97df44 | 3 | * Copyright (c) 2016, STMicroelectronics |
lypinator | 0:bb348c97df44 | 4 | * All rights reserved. |
lypinator | 0:bb348c97df44 | 5 | * |
lypinator | 0:bb348c97df44 | 6 | * Redistribution and use in source and binary forms, with or without |
lypinator | 0:bb348c97df44 | 7 | * modification, are permitted provided that the following conditions are met: |
lypinator | 0:bb348c97df44 | 8 | * |
lypinator | 0:bb348c97df44 | 9 | * 1. Redistributions of source code must retain the above copyright notice, |
lypinator | 0:bb348c97df44 | 10 | * this list of conditions and the following disclaimer. |
lypinator | 0:bb348c97df44 | 11 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
lypinator | 0:bb348c97df44 | 12 | * this list of conditions and the following disclaimer in the documentation |
lypinator | 0:bb348c97df44 | 13 | * and/or other materials provided with the distribution. |
lypinator | 0:bb348c97df44 | 14 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
lypinator | 0:bb348c97df44 | 15 | * may be used to endorse or promote products derived from this software |
lypinator | 0:bb348c97df44 | 16 | * without specific prior written permission. |
lypinator | 0:bb348c97df44 | 17 | * |
lypinator | 0:bb348c97df44 | 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
lypinator | 0:bb348c97df44 | 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
lypinator | 0:bb348c97df44 | 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
lypinator | 0:bb348c97df44 | 21 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
lypinator | 0:bb348c97df44 | 22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
lypinator | 0:bb348c97df44 | 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
lypinator | 0:bb348c97df44 | 24 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
lypinator | 0:bb348c97df44 | 25 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
lypinator | 0:bb348c97df44 | 26 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
lypinator | 0:bb348c97df44 | 27 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
lypinator | 0:bb348c97df44 | 28 | ******************************************************************************* |
lypinator | 0:bb348c97df44 | 29 | */ |
lypinator | 0:bb348c97df44 | 30 | #include "port_api.h" |
lypinator | 0:bb348c97df44 | 31 | #include "pinmap.h" |
lypinator | 0:bb348c97df44 | 32 | #include "gpio_api.h" |
lypinator | 0:bb348c97df44 | 33 | #include "mbed_error.h" |
lypinator | 0:bb348c97df44 | 34 | |
lypinator | 0:bb348c97df44 | 35 | #if DEVICE_PORTIN || DEVICE_PORTOUT |
lypinator | 0:bb348c97df44 | 36 | |
lypinator | 0:bb348c97df44 | 37 | extern GPIO_TypeDef *Set_GPIO_Clock(uint32_t port_idx); |
lypinator | 0:bb348c97df44 | 38 | |
lypinator | 0:bb348c97df44 | 39 | // high nibble = port number (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, ...) |
lypinator | 0:bb348c97df44 | 40 | // low nibble = pin number |
lypinator | 0:bb348c97df44 | 41 | PinName port_pin(PortName port, int pin_n) |
lypinator | 0:bb348c97df44 | 42 | { |
lypinator | 0:bb348c97df44 | 43 | return (PinName)(pin_n + (port << 4)); |
lypinator | 0:bb348c97df44 | 44 | } |
lypinator | 0:bb348c97df44 | 45 | |
lypinator | 0:bb348c97df44 | 46 | void port_init(port_t *obj, PortName port, int mask, PinDirection dir) |
lypinator | 0:bb348c97df44 | 47 | { |
lypinator | 0:bb348c97df44 | 48 | uint32_t port_index = (uint32_t)port; |
lypinator | 0:bb348c97df44 | 49 | |
lypinator | 0:bb348c97df44 | 50 | // Enable GPIO clock |
lypinator | 0:bb348c97df44 | 51 | GPIO_TypeDef *gpio = Set_GPIO_Clock(port_index); |
lypinator | 0:bb348c97df44 | 52 | |
lypinator | 0:bb348c97df44 | 53 | // Fill PORT object structure for future use |
lypinator | 0:bb348c97df44 | 54 | obj->port = port; |
lypinator | 0:bb348c97df44 | 55 | obj->mask = mask; |
lypinator | 0:bb348c97df44 | 56 | obj->direction = dir; |
lypinator | 0:bb348c97df44 | 57 | obj->reg_in = &gpio->IDR; |
lypinator | 0:bb348c97df44 | 58 | obj->reg_out = &gpio->ODR; |
lypinator | 0:bb348c97df44 | 59 | |
lypinator | 0:bb348c97df44 | 60 | port_dir(obj, dir); |
lypinator | 0:bb348c97df44 | 61 | } |
lypinator | 0:bb348c97df44 | 62 | |
lypinator | 0:bb348c97df44 | 63 | void port_dir(port_t *obj, PinDirection dir) |
lypinator | 0:bb348c97df44 | 64 | { |
lypinator | 0:bb348c97df44 | 65 | uint32_t i; |
lypinator | 0:bb348c97df44 | 66 | obj->direction = dir; |
lypinator | 0:bb348c97df44 | 67 | for (i = 0; i < 16; i++) { // Process all pins |
lypinator | 0:bb348c97df44 | 68 | if (obj->mask & (1 << i)) { // If the pin is used |
lypinator | 0:bb348c97df44 | 69 | if (dir == PIN_OUTPUT) { |
lypinator | 0:bb348c97df44 | 70 | pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0)); |
lypinator | 0:bb348c97df44 | 71 | } else { // PIN_INPUT |
lypinator | 0:bb348c97df44 | 72 | pin_function(port_pin(obj->port, i), STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)); |
lypinator | 0:bb348c97df44 | 73 | } |
lypinator | 0:bb348c97df44 | 74 | } |
lypinator | 0:bb348c97df44 | 75 | } |
lypinator | 0:bb348c97df44 | 76 | } |
lypinator | 0:bb348c97df44 | 77 | |
lypinator | 0:bb348c97df44 | 78 | void port_mode(port_t *obj, PinMode mode) |
lypinator | 0:bb348c97df44 | 79 | { |
lypinator | 0:bb348c97df44 | 80 | uint32_t i; |
lypinator | 0:bb348c97df44 | 81 | for (i = 0; i < 16; i++) { // Process all pins |
lypinator | 0:bb348c97df44 | 82 | if (obj->mask & (1 << i)) { // If the pin is used |
lypinator | 0:bb348c97df44 | 83 | pin_mode(port_pin(obj->port, i), mode); |
lypinator | 0:bb348c97df44 | 84 | } |
lypinator | 0:bb348c97df44 | 85 | } |
lypinator | 0:bb348c97df44 | 86 | } |
lypinator | 0:bb348c97df44 | 87 | |
lypinator | 0:bb348c97df44 | 88 | void port_write(port_t *obj, int value) |
lypinator | 0:bb348c97df44 | 89 | { |
lypinator | 0:bb348c97df44 | 90 | *obj->reg_out = (*obj->reg_out & ~obj->mask) | (value & obj->mask); |
lypinator | 0:bb348c97df44 | 91 | } |
lypinator | 0:bb348c97df44 | 92 | |
lypinator | 0:bb348c97df44 | 93 | int port_read(port_t *obj) |
lypinator | 0:bb348c97df44 | 94 | { |
lypinator | 0:bb348c97df44 | 95 | if (obj->direction == PIN_OUTPUT) { |
lypinator | 0:bb348c97df44 | 96 | return (*obj->reg_out & obj->mask); |
lypinator | 0:bb348c97df44 | 97 | } else { // PIN_INPUT |
lypinator | 0:bb348c97df44 | 98 | return (*obj->reg_in & obj->mask); |
lypinator | 0:bb348c97df44 | 99 | } |
lypinator | 0:bb348c97df44 | 100 | } |
lypinator | 0:bb348c97df44 | 101 | |
lypinator | 0:bb348c97df44 | 102 | #endif |