mbed library sources. Supersedes mbed-src.
Fork of mbed-dev by
targets/TARGET_STM/TARGET_STM32F1/pinmap.c
- Committer:
- <>
- Date:
- 2016-10-28
- Revision:
- 149:156823d33999
File content as of revision 149:156823d33999:
/* mbed Microcontroller Library ******************************************************************************* * Copyright (c) 2014, 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 // Warning: the elements order must be the same as the one defined in PinNames.h static const uint32_t gpio_mode[13] = { GPIO_MODE_INPUT, // 0 = STM_MODE_INPUT GPIO_MODE_OUTPUT_PP, // 1 = STM_MODE_OUTPUT_PP GPIO_MODE_OUTPUT_OD, // 2 = STM_MODE_OUTPUT_OD GPIO_MODE_AF_PP, // 3 = STM_MODE_AF_PP GPIO_MODE_AF_OD, // 4 = STM_MODE_AF_OD GPIO_MODE_ANALOG, // 5 = STM_MODE_ANALOG GPIO_MODE_IT_RISING, // 6 = STM_MODE_IT_RISING GPIO_MODE_IT_FALLING, // 7 = STM_MODE_IT_FALLING GPIO_MODE_IT_RISING_FALLING, // 8 = STM_MODE_IT_RISING_FALLING GPIO_MODE_EVT_RISING, // 9 = STM_MODE_EVT_RISING GPIO_MODE_EVT_FALLING, // 10 = STM_MODE_EVT_FALLING GPIO_MODE_EVT_RISING_FALLING, // 11 = STM_MODE_EVT_RISING_FALLING 0x10000000 // 12 = STM_MODE_IT_EVT_RESET (not in STM32Cube HAL) }; // 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; case PortD: gpio_add = GPIOD_BASE; __GPIOD_CLK_ENABLE(); break; default: error("Pinmap error: wrong port number."); break; } return gpio_add; } /** * Configure pin (input, output, alternate function or analog) + output speed + AF */ 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; // Enable AFIO clock __HAL_RCC_AFIO_CLK_ENABLE(); // Configure Alternate Function // Warning: Must be done before the GPIO is initialized if (afnum > 0) { switch (afnum) { case 1: // Remap SPI1 __HAL_AFIO_REMAP_SPI1_ENABLE(); break; case 2: // Remap I2C1 __HAL_AFIO_REMAP_I2C1_ENABLE(); break; case 3: // Remap USART1 __HAL_AFIO_REMAP_USART1_ENABLE(); break; case 4: // Remap USART2 __HAL_AFIO_REMAP_USART2_ENABLE(); break; case 5: // Partial Remap USART3 __HAL_AFIO_REMAP_USART3_PARTIAL(); break; case 6: // Partial Remap TIM1 __HAL_AFIO_REMAP_TIM1_PARTIAL(); break; case 7: // Partial Remap TIM3 __HAL_AFIO_REMAP_TIM3_PARTIAL(); break; case 8: // Full Remap TIM2 __HAL_AFIO_REMAP_TIM2_ENABLE(); break; case 9: // Full Remap TIM3 __HAL_AFIO_REMAP_TIM3_ENABLE(); break; default: break; } } // 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; HAL_GPIO_Init(gpio, &GPIO_InitStructure); // Disconnect JTAG-DP + SW-DP signals. // Warning: Need to reconnect under reset if ((pin == PA_13) || (pin == PA_14)) { __HAL_AFIO_REMAP_SWJ_DISABLE(); // JTAG-DP Disabled and SW-DP Disabled } if ((pin == PA_15) || (pin == PB_3) || (pin == PB_4)) { __HAL_AFIO_REMAP_SWJ_NOJTAG(); // JTAG-DP Disabled and SW-DP enabled } } /** * 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; __IO uint32_t* gpio_reg_hl;//gpio register depends on bit index (high or low) uint32_t shift; if (pin_index < 8) { shift = (pin_index * 4); gpio_reg_hl = &(gpio->CRL); } else { shift = (pin_index % 8) * 4; gpio_reg_hl = &(gpio->CRH); } // Configure open-drain and pull-up/down switch (mode) { case PullNone: break; case PullUp: case PullDown: // Set pull-up / pull-down for Input mode if ((*gpio_reg_hl & (0x03 << shift)) == 0) { // MODE bits = Input mode *gpio_reg_hl |= (0x08 << shift); // Set pull-up / pull-down *gpio_reg_hl &= ~(0x04 << shift); // ENSURES GPIOx_CRL.CNFx.bit0 = 0 } // Now it's time to setup properly if pullup or pulldown. This is done in ODR register: // set pull-up => bit=1, set pull-down => bit = 0 if (mode == PullUp) { gpio->ODR |= (0x01 << (pin_index)); // Set pull-up } else{ gpio->ODR &= ~(0x01 << (pin_index)); // Set pull-down } break; case OpenDrain: // Set open-drain for Output mode (General Purpose or Alternate Function) if ((*gpio_reg_hl & (0x03 << shift)) > 0) { // MODE bits = Output mode *gpio_reg_hl |= (0x04 << shift); // Set open-drain } break; default: break; } } /* 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 pull = PullNone; __IO uint32_t* gpio_reg_hl;//gpio register depends on bit index (high or low) uint32_t shift; if (pin_index < 8) { shift = (pin_index * 4); gpio_reg_hl = &(gpio->CRL); } else { shift = (pin_index % 8) * 4; gpio_reg_hl = &(gpio->CRH); } /* Check if pull/pull down is active */ if ((!(*gpio_reg_hl & (0x03 << shift))) // input && (!!(*gpio_reg_hl & (0x08 << shift))) // pull-up / down && (!(*gpio_reg_hl & (0x04 << shift)))) { // GPIOx_CRL.CNFx.bit0 = 0 if (!!(gpio->ODR & (0x01 << pin_index))) { pull = PullUp; } else { pull = PullDown; } } else { //output if (!!(*gpio_reg_hl & (0x04 << shift))) { //open drain pull = OpenDrain; } } /* Then re-use global function for updating the mode part*/ pin_function(pin, STM_PIN_DATA(gpiomode, pull, 0)); }