1 /* mbed Microcontroller Library
2 *******************************************************************************
3 * Copyright (c) 2014, STMicroelectronics
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *******************************************************************************
30 #include "mbed_assert.h"
32 #include "PortNames.h"
33 #include "mbed_error.h"
35 // GPIO mode look-up table
36 // Warning: the elements order must be the same as the one defined in PinNames.h
37 static const uint32_t gpio_mode[13] = {
38 GPIO_MODE_INPUT, // 0 = STM_MODE_INPUT
39 GPIO_MODE_OUTPUT_PP, // 1 = STM_MODE_OUTPUT_PP
40 GPIO_MODE_OUTPUT_OD, // 2 = STM_MODE_OUTPUT_OD
41 GPIO_MODE_AF_PP, // 3 = STM_MODE_AF_PP
42 GPIO_MODE_AF_OD, // 4 = STM_MODE_AF_OD
43 GPIO_MODE_ANALOG, // 5 = STM_MODE_ANALOG
44 GPIO_MODE_IT_RISING, // 6 = STM_MODE_IT_RISING
45 GPIO_MODE_IT_FALLING, // 7 = STM_MODE_IT_FALLING
46 GPIO_MODE_IT_RISING_FALLING, // 8 = STM_MODE_IT_RISING_FALLING
47 GPIO_MODE_EVT_RISING, // 9 = STM_MODE_EVT_RISING
48 GPIO_MODE_EVT_FALLING, // 10 = STM_MODE_EVT_FALLING
49 GPIO_MODE_EVT_RISING_FALLING, // 11 = STM_MODE_EVT_RISING_FALLING
50 0x10000000 // 12 = STM_MODE_IT_EVT_RESET (not in STM32Cube HAL)
53 // Enable GPIO clock and return GPIO base address
54 uint32_t Set_GPIO_Clock(uint32_t port_idx)
56 uint32_t gpio_add = 0;
59 gpio_add = GPIOA_BASE;
63 gpio_add = GPIOB_BASE;
67 gpio_add = GPIOC_BASE;
71 gpio_add = GPIOD_BASE;
74 #if defined(GPIOE_BASE)
76 gpio_add = GPIOE_BASE;
81 gpio_add = GPIOF_BASE;
85 error("Pinmap error: wrong port number.");
92 * Configure pin (mode, speed, output type and pull-up/pull-down)
94 void pin_function(PinName pin, int data)
96 MBED_ASSERT(pin != (PinName)NC);
97 // Get the pin informations
98 uint32_t mode = STM_PIN_MODE(data);
99 uint32_t pupd = STM_PIN_PUPD(data);
100 uint32_t afnum = STM_PIN_AFNUM(data);
102 uint32_t port_index = STM_PORT(pin);
103 uint32_t pin_index = STM_PIN(pin);
106 uint32_t gpio_add = Set_GPIO_Clock(port_index);
107 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
110 GPIO_InitTypeDef GPIO_InitStructure;
111 GPIO_InitStructure.Pin = (uint32_t)(1 << pin_index);
112 GPIO_InitStructure.Mode = gpio_mode[mode];
113 GPIO_InitStructure.Pull = pupd;
114 GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
115 GPIO_InitStructure.Alternate = afnum;
116 HAL_GPIO_Init(gpio, &GPIO_InitStructure);
118 // [TODO] Disconnect JTAG-DP + SW-DP signals.
119 // Warning: Need to reconnect under reset
120 //if ((pin == PA_13) || (pin == PA_14)) {
126 * Configure pin pull-up/pull-down
128 void pin_mode(PinName pin, PinMode mode)
130 MBED_ASSERT(pin != (PinName)NC);
131 uint32_t port_index = STM_PORT(pin);
132 uint32_t pin_index = STM_PIN(pin);
135 uint32_t gpio_add = Set_GPIO_Clock(port_index);
136 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
138 // Configure pull-up/pull-down resistors
139 uint32_t pupd = (uint32_t)mode;
141 pupd = 0; // Open-drain = No pull-up/No pull-down
143 gpio->PUPDR &= (uint32_t)(~(GPIO_PUPDR_PUPDR0 << (pin_index * 2)));
144 gpio->PUPDR |= (uint32_t)(pupd << (pin_index * 2));