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mbed-os/targets/TARGET_STM/TARGET_STM32F7/pinmap.c

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/* mbed Microcontroller Library
*******************************************************************************
* Copyright (c) 2015, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
#include "mbed_assert.h"
#include "pinmap.h"
#include "PortNames.h"
#include "mbed_error.h"
// GPIO mode look-up table
static const uint32_t gpio_mode[13] = {
0x00000000, // 0 = GPIO_MODE_INPUT
0x00000001, // 1 = GPIO_MODE_OUTPUT_PP
0x00000011, // 2 = GPIO_MODE_OUTPUT_OD
0x00000002, // 3 = GPIO_MODE_AF_PP
0x00000012, // 4 = GPIO_MODE_AF_OD
0x00000003, // 5 = GPIO_MODE_ANALOG
0x10110000, // 6 = GPIO_MODE_IT_RISING
0x10210000, // 7 = GPIO_MODE_IT_FALLING
0x10310000, // 8 = GPIO_MODE_IT_RISING_FALLING
0x10120000, // 9 = GPIO_MODE_EVT_RISING
0x10220000, // 10 = GPIO_MODE_EVT_FALLING
0x10320000, // 11 = GPIO_MODE_EVT_RISING_FALLING
0x10000000 // 12 = Reset GPIO_MODE_IT_EVT
};
// Enable GPIO clock and return GPIO base address
uint32_t Set_GPIO_Clock(uint32_t port_idx)
{
uint32_t gpio_add = 0;
switch (port_idx) {
case PortA:
gpio_add = GPIOA_BASE;
__GPIOA_CLK_ENABLE();
break;
case PortB:
gpio_add = GPIOB_BASE;
__GPIOB_CLK_ENABLE();
break;
case PortC:
gpio_add = GPIOC_BASE;
__GPIOC_CLK_ENABLE();
break;
#if defined GPIOD_BASE
case PortD:
gpio_add = GPIOD_BASE;
__GPIOD_CLK_ENABLE();
break;
#endif
#if defined GPIOE_BASE
case PortE:
gpio_add = GPIOE_BASE;
__GPIOE_CLK_ENABLE();
break;
#endif
#if defined GPIOF_BASE
case PortF:
gpio_add = GPIOF_BASE;
__GPIOF_CLK_ENABLE();
break;
#endif
#if defined GPIOG_BASE
case PortG:
gpio_add = GPIOG_BASE;
__GPIOG_CLK_ENABLE();
break;
#endif
#if defined GPIOH_BASE
case PortH:
gpio_add = GPIOH_BASE;
__GPIOH_CLK_ENABLE();
break;
#endif
#if defined GPIOI_BASE
case PortI:
gpio_add = GPIOI_BASE;
__GPIOI_CLK_ENABLE();
break;
#endif
#if defined GPIOJ_BASE
case PortJ:
gpio_add = GPIOJ_BASE;
__GPIOJ_CLK_ENABLE();
break;
#endif
#if defined GPIOK_BASE
case PortK:
gpio_add = GPIOK_BASE;
__GPIOK_CLK_ENABLE();
break;
#endif
default:
error("Pinmap error: wrong port number.");
break;
}
return gpio_add;
}
/**
* Configure pin (mode, speed, output type and pull-up/pull-down)
*/
void pin_function(PinName pin, int data)
{
MBED_ASSERT(pin != (PinName)NC);
// Get the pin informations
uint32_t mode = STM_PIN_MODE(data);
uint32_t pupd = STM_PIN_PUPD(data);
uint32_t afnum = STM_PIN_AFNUM(data);
uint32_t port_index = STM_PORT(pin);
uint32_t pin_index = STM_PIN(pin);
// Enable GPIO clock
uint32_t gpio_add = Set_GPIO_Clock(port_index);
GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
// Configure GPIO
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.Pin = (uint32_t)(1 << pin_index);
GPIO_InitStructure.Mode = gpio_mode[mode];
GPIO_InitStructure.Pull = pupd;
GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
GPIO_InitStructure.Alternate = afnum;
HAL_GPIO_Init(gpio, &GPIO_InitStructure);
// [TODO] Disconnect JTAG-DP + SW-DP signals.
// Warning: Need to reconnect under reset
//if ((pin == PA_13) || (pin == PA_14)) {
//
//}
//if ((pin == PA_15) || (pin == PB_3) || (pin == PB_4)) {
//
//}
}
/**
* Configure pin pull-up/pull-down
*/
void pin_mode(PinName pin, PinMode mode)
{
MBED_ASSERT(pin != (PinName)NC);
uint32_t port_index = STM_PORT(pin);
uint32_t pin_index = STM_PIN(pin);
// Enable GPIO clock
uint32_t gpio_add = Set_GPIO_Clock(port_index);
GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add;
// Configure pull-up/pull-down resistors
uint32_t pupd = (uint32_t)mode;
if (pupd > 2)
pupd = 0; // Open-drain = No pull-up/No pull-down
gpio->PUPDR &= (uint32_t)(~(GPIO_PUPDR_PUPDR0 << (pin_index * 2)));
gpio->PUPDR |= (uint32_t)(pupd << (pin_index * 2));
}
/* Internal function for setting the gpiomode/function
* without changing Pull mode
*/
void pin_function_gpiomode(PinName pin, uint32_t gpiomode) {
/* Read current pull state from HW to avoid over-write*/
uint32_t port_index = STM_PORT(pin);
uint32_t pin_index = STM_PIN(pin);
GPIO_TypeDef *gpio = (GPIO_TypeDef *) Set_GPIO_Clock(port_index);
uint32_t temp = gpio->PUPDR;
uint32_t pull = (temp >> (pin_index * 2U)) & GPIO_PUPDR_PUPDR0;
/* Then re-use global function for updating the mode part*/
pin_function(pin, STM_PIN_DATA(gpiomode, pull, 0));
}
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