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;
75 error("Pinmap error: wrong port number.");
82 * Configure pin (input, output, alternate function or analog) + output speed + AF
84 void pin_function(PinName pin, int data)
86 MBED_ASSERT(pin != (PinName)NC);
87 // Get the pin informations
88 uint32_t mode = STM_PIN_MODE(data);
89 uint32_t pupd = STM_PIN_PUPD(data);
90 uint32_t afnum = STM_PIN_AFNUM(data);
92 uint32_t port_index = STM_PORT(pin);
93 uint32_t pin_index = STM_PIN(pin);
96 uint32_t gpio_add = Set_GPIO_Clock(port_index);
97 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
100 __HAL_RCC_AFIO_CLK_ENABLE();
102 // Configure Alternate Function
103 // Warning: Must be done before the GPIO is initialized
106 case 1: // Remap SPI1
107 __HAL_AFIO_REMAP_SPI1_ENABLE();
109 case 2: // Remap I2C1
110 __HAL_AFIO_REMAP_I2C1_ENABLE();
112 case 3: // Remap USART1
113 __HAL_AFIO_REMAP_USART1_ENABLE();
115 case 4: // Remap USART2
116 __HAL_AFIO_REMAP_USART2_ENABLE();
118 case 5: // Partial Remap USART3
119 __HAL_AFIO_REMAP_USART3_PARTIAL();
121 case 6: // Partial Remap TIM1
122 __HAL_AFIO_REMAP_TIM1_PARTIAL();
124 case 7: // Partial Remap TIM3
125 __HAL_AFIO_REMAP_TIM3_PARTIAL();
127 case 8: // Full Remap TIM2
128 __HAL_AFIO_REMAP_TIM2_ENABLE();
130 case 9: // Full Remap TIM3
131 __HAL_AFIO_REMAP_TIM3_ENABLE();
139 GPIO_InitTypeDef GPIO_InitStructure;
140 GPIO_InitStructure.Pin = (uint32_t)(1 << pin_index);
141 GPIO_InitStructure.Mode = gpio_mode[mode];
142 GPIO_InitStructure.Pull = pupd;
143 GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
144 HAL_GPIO_Init(gpio, &GPIO_InitStructure);
146 // Disconnect JTAG-DP + SW-DP signals.
147 // Warning: Need to reconnect under reset
148 if ((pin == PA_13) || (pin == PA_14)) {
149 __HAL_AFIO_REMAP_SWJ_DISABLE(); // JTAG-DP Disabled and SW-DP Disabled
151 if ((pin == PA_15) || (pin == PB_3) || (pin == PB_4)) {
152 __HAL_AFIO_REMAP_SWJ_NOJTAG(); // JTAG-DP Disabled and SW-DP enabled
157 * Configure pin pull-up/pull-down
159 void pin_mode(PinName pin, PinMode mode)
161 MBED_ASSERT(pin != (PinName)NC);
163 uint32_t port_index = STM_PORT(pin);
164 uint32_t pin_index = STM_PIN(pin);
167 uint32_t gpio_add = Set_GPIO_Clock(port_index);
168 GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
170 // Configure open-drain and pull-up/down
176 // Set pull-up / pull-down for Input mode
178 if ((gpio->CRL & (0x03 << (pin_index * 4))) == 0) { // MODE bits = Input mode
179 gpio->CRL |= (0x08 << (pin_index * 4)); // Set pull-up / pull-down
182 if ((gpio->CRH & (0x03 << ((pin_index % 8) * 4))) == 0) { // MODE bits = Input mode
183 gpio->CRH |= (0x08 << ((pin_index % 8) * 4)); // Set pull-up / pull-down
188 // Set open-drain for Output mode (General Purpose or Alternate Function)
190 if ((gpio->CRL & (0x03 << (pin_index * 4))) > 0) { // MODE bits = Output mode
191 gpio->CRL |= (0x04 << (pin_index * 4)); // Set open-drain
194 if ((gpio->CRH & (0x03 << ((pin_index % 8) * 4))) > 0) { // MODE bits = Output mode
195 gpio->CRH |= (0x04 << ((pin_index % 8) * 4)); // Set open-drain