void gpio_init(gpio_t *obj, PinName pin) { obj->pin = pin; if (pin == (PinName)NC) { return; } uint32_t port_index = STM_PORT(pin); // Enable GPIO clock uint32_t gpio_add = Set_GPIO_Clock(port_index); GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add; // Fill GPIO object structure for future use obj->mask = gpio_set(pin); obj->reg_in = &gpio->IDR; obj->reg_set = &gpio->BSRR; obj->reg_clr = &gpio->BRR; }
/** * 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)); }
/** * Configure pin pull-up/pull-down */ void pin_mode(PinName pin, PinMode mode) { MBED_ASSERT(pin != (PinName)NC); GPIO_InitTypeDef GPIO_InitStructure; 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 open-drain and pull-up/down switch (mode) { case PullNone: return; case PullUp: GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; break; case PullDown: GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; break; case OpenDrain: if (pin_index < 8) { if ((gpio->CRL & (0x03 << (pin_index * 4))) > 0) { // MODE bits = Output mode gpio->CRL |= (0x04 << (pin_index * 4)); // Set open-drain } } else { if ((gpio->CRH & (0x03 << ((pin_index % 8) * 4))) > 0) { // MODE bits = Output mode gpio->CRH |= (0x04 << ((pin_index % 8) * 4)); // Set open-drain } } return; default: break; } // Configure GPIO GPIO_InitStructure.GPIO_Pin = (uint16_t)(1 << pin_index); GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(gpio, &GPIO_InitStructure); }
/** * Configure pin (mode, speed, output type and pull-up/pull-down) */ void pin_function(PinName pin, int data) { if (pin == NC) return; // Get the pin informations uint32_t mode = STM_PIN_MODE(data); uint32_t otype = STM_PIN_OTYPE(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 Alternate Function // Warning: Must be done before the GPIO is initialized if (afnum != 0xFF) { GPIO_PinAFConfig(gpio, (uint16_t)pin_index, afnum); } // Configure GPIO GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_Pin = (uint16_t)(1 << pin_index); GPIO_InitStructure.GPIO_Mode = (GPIOMode_TypeDef)mode; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_3; GPIO_InitStructure.GPIO_OType = (GPIOOType_TypeDef)otype; GPIO_InitStructure.GPIO_PuPd = (GPIOPuPd_TypeDef)pupd; 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 (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 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 RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); // Configure Alternate Function // Warning: Must be done before the GPIO is initialized if ((afnum > 0) && (afnum < AF_NUM)) { GPIO_PinRemapConfig(AF_mapping[afnum], ENABLE); } // Configure GPIO GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_Pin = (uint16_t)(1 << pin_index); GPIO_InitStructure.GPIO_Mode = (GPIOMode_TypeDef)mode; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(gpio, &GPIO_InitStructure); // Disconnect JTAG-DP + SW-DP signals. // Warning: Need to reconnect under reset if ((pin == PA_13) || (pin == PA_14)) { GPIO_PinRemapConfig(GPIO_Remap_SWJ_Disable, ENABLE); } if ((pin == PA_15) || (pin == PB_3) || (pin == PB_4)) { GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE); } }
void gpio_init(gpio_t *obj, PinName pin) { obj->pin = pin; if (pin == (PinName)NC) { return; } uint32_t port_index = STM_PORT(pin); // Enable GPIO clock GPIO_TypeDef *gpio = Set_GPIO_Clock(port_index); // Fill GPIO object structure for future use obj->mask = gpio_set(pin); obj->gpio = gpio; obj->ll_pin = ll_pin_defines[STM_PIN(obj->pin)]; obj->reg_in = &gpio->IDR; obj->reg_set = &gpio->BSRR; #ifdef GPIO_IP_WITHOUT_BRR obj->reg_clr = &gpio->BSRR; #else obj->reg_clr = &gpio->BRR; #endif }
/* 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)); }
void gpio_init(gpio_t *obj, PinName pin, PinDirection direction) { if (pin == NC) return; uint32_t port_index = STM_PORT(pin); // Enable GPIO clock uint32_t gpio_add = Set_GPIO_Clock(port_index); GPIO_TypeDef *gpio = (GPIO_TypeDef *)gpio_add; // Fill GPIO object structure for future use obj->pin = pin; obj->mask = gpio_set(pin); obj->reg_in = &gpio->IDR; obj->reg_set = &gpio->BSRRL; obj->reg_clr = &gpio->BSRRH; // Configure GPIO if (direction == PIN_OUTPUT) { pin_function(pin, STM_PIN_DATA(GPIO_Mode_OUT, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)); } else { // PIN_INPUT pin_function(pin, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF)); } }
/** * 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 } }
int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) { IRQn_Type irq_n = (IRQn_Type)0; uint32_t vector = 0; uint32_t irq_index; if (pin == NC) return -1; uint32_t port_index = STM_PORT(pin); uint32_t pin_index = STM_PIN(pin); // Select irq number and interrupt routine switch (pin_index) { case 0: irq_n = EXTI0_IRQn; vector = (uint32_t)&gpio_irq0; irq_index = 0; break; case 1: irq_n = EXTI1_IRQn; vector = (uint32_t)&gpio_irq1; irq_index = 1; break; case 2: irq_n = EXTI2_IRQn; vector = (uint32_t)&gpio_irq2; irq_index = 2; break; case 3: irq_n = EXTI3_IRQn; vector = (uint32_t)&gpio_irq3; irq_index = 3; break; case 4: irq_n = EXTI4_IRQn; vector = (uint32_t)&gpio_irq4; irq_index = 4; break; case 5: case 6: case 7: case 8: case 9: irq_n = EXTI9_5_IRQn; vector = (uint32_t)&gpio_irq5; irq_index = 5; break; case 10: case 11: case 12: case 13: case 14: case 15: irq_n = EXTI15_10_IRQn; vector = (uint32_t)&gpio_irq6; irq_index = 6; break; default: error("InterruptIn error: pin not supported.\n"); return -1; } // Enable GPIO clock uint32_t gpio_add = Set_GPIO_Clock(port_index); // Configure GPIO pin_function(pin, STM_PIN_DATA(STM_MODE_IT_FALLING, GPIO_NOPULL, 0)); // Enable EXTI interrupt NVIC_SetVector(irq_n, vector); NVIC_EnableIRQ(irq_n); // Save informations for future use obj->irq_n = irq_n; obj->irq_index = irq_index; obj->event = EDGE_NONE; obj->pin = pin; channel_ids[irq_index] = id; channel_gpio[irq_index] = gpio_add; channel_pin[irq_index] = pin_index; irq_handler = handler; return 0; }
int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) { IRQn_Type irq_n = (IRQn_Type)0; uint32_t vector = 0; uint32_t irq_index; if (pin == NC) return -1; uint32_t port_index = STM_PORT(pin); uint32_t pin_index = STM_PIN(pin); // Select irq number and interrupt routine if ((pin_index == 0) || (pin_index == 1)) { irq_n = EXTI0_1_IRQn; vector = (uint32_t)&gpio_irq0; irq_index = 0; } else if ((pin_index == 2) || (pin_index == 3)) { irq_n = EXTI2_3_IRQn; vector = (uint32_t)&gpio_irq1; irq_index = 1; } else if ((pin_index > 3) && (pin_index < 16)) { irq_n = EXTI4_15_IRQn; vector = (uint32_t)&gpio_irq2; irq_index = 2; } else { error("InterruptIn error: pin not supported.\n"); return -1; } // Enable GPIO clock uint32_t gpio_add = Set_GPIO_Clock(port_index); // Enable SYSCFG clock RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE); // Connect EXTI line to pin SYSCFG_EXTILineConfig(port_index, pin_index); // Configure EXTI line EXTI_InitTypeDef EXTI_InitStructure; EXTI_InitStructure.EXTI_Line = (uint32_t)(1 << pin_index); EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure); // Enable and set EXTI interrupt to the lowest priority NVIC_InitTypeDef NVIC_InitStructure; NVIC_InitStructure.NVIC_IRQChannel = irq_n; NVIC_InitStructure.NVIC_IRQChannelPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); NVIC_SetVector(irq_n, vector); NVIC_EnableIRQ(irq_n); // Save informations for future use obj->irq_n = irq_n; obj->irq_index = irq_index; obj->event = EDGE_NONE; channel_ids[irq_index] = id; channel_gpio[irq_index] = gpio_add; channel_pin[irq_index] = pin_index; irq_handler = handler; return 0; }
int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id) { IRQn_Type irq_n = (IRQn_Type)0; uint32_t vector = 0; uint32_t irq_index; if (pin == NC) return -1; uint32_t port_index = STM_PORT(pin); uint32_t pin_index = STM_PIN(pin); // Select irq number and interrupt routine switch (pin_index) { case 0: irq_n = EXTI0_IRQn; vector = (uint32_t)&gpio_irq0; irq_index = 0; break; case 1: irq_n = EXTI1_IRQn; vector = (uint32_t)&gpio_irq1; irq_index = 1; break; case 2: irq_n = EXTI2_TS_IRQn; vector = (uint32_t)&gpio_irq2; irq_index = 2; break; case 3: irq_n = EXTI3_IRQn; vector = (uint32_t)&gpio_irq3; irq_index = 3; break; case 4: irq_n = EXTI4_IRQn; vector = (uint32_t)&gpio_irq4; irq_index = 4; break; case 5: case 6: case 7: case 8: case 9: irq_n = EXTI9_5_IRQn; vector = (uint32_t)&gpio_irq5; irq_index = 5; break; case 10: case 11: case 12: case 13: case 14: case 15: irq_n = EXTI15_10_IRQn; vector = (uint32_t)&gpio_irq6; irq_index = 6; break; default: error("This pin is not supported with InterruptIn.\n"); return -1; } // Enable GPIO clock uint32_t gpio_add = Set_GPIO_Clock(port_index); // Enable SYSCFG clock RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE); // Connect EXTI line to pin SYSCFG_EXTILineConfig(port_index, pin_index); // Configure EXTI line EXTI_InitTypeDef EXTI_InitStructure; EXTI_InitStructure.EXTI_Line = pin_index; EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure); // Enable and set EXTI interrupt to the lowest priority NVIC_InitTypeDef NVIC_InitStructure; NVIC_InitStructure.NVIC_IRQChannel = irq_n; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); NVIC_SetVector(irq_n, vector); NVIC_EnableIRQ(irq_n); // Save informations for future use obj->irq_n = irq_n; obj->irq_index = irq_index; obj->event = EDGE_NONE; channel_ids[irq_index] = id; channel_gpio[irq_index] = gpio_add; channel_pin[irq_index] = pin_index; irq_handler = handler; return 0; }