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兆易创新 GD32 系列(三) 标准库初探，点灯LED
点灯是跑程序的第一步，犹如灯塔照亮了前进的路。无论干过多少年，你都是要点灯，MCU的新手村
在GD32 系列(二) 中认识到 gd32f4xx_libopt.h的作用，它包含了所有的标准库头文件
点灯要用到的就是GPIO操作 参考标准工程即可void gd_eval_led_init (led_typedef_enum lednum) { /* enable the led clock */ rcu_periph_clock_enable(GPIO_CLK[lednum]); /* configure led GPIO port */ gpio_mode_set(GPIO_PORT[lednum], GPIO_MODE_OUTPUT, GPIO_PUPD_NONE,GPIO_PIN[lednum]); gpio_output_options_set(GPIO_PORT[lednum], GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ,GPIO_PIN[lednum]); GPIO_BC(GPIO_PORT[lednum]) = GPIO_PIN[lednum]; }- 1
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一个外设如果要正常工作，首先要启动它对应的输入时钟
rcu_periph_clock_enable 是所有外设初始化都需要使用到的部分/*! \brief enable the peripherals clock \param[in] periph: RCU peripherals, refer to rcu_periph_enum only one parameter can be selected which is shown as below: \arg RCU_GPIOx (x = A, B, C, D, E, F, G, H, I): GPIO ports clock \arg RCU_CRC: CRC clock \arg RCU_BKPSRAM: BKPSRAM clock \arg RCU_TCMSRAM: TCMSRAM clock \arg RCU_DMAx (x=0,1): DMA clock \arg RCU_IPA: IPA clock \arg RCU_ENET: ENET clock \arg RCU_ENETTX: ENETTX clock \arg RCU_ENETRX: ENETRX clock \arg RCU_ENETPTP: ENETPTP clock \arg RCU_USBHS: USBHS clock \arg RCU_USBHSULPI: USBHSULPI clock \arg RCU_DCI: DCI clock \arg RCU_TRNG: TRNG clock \arg RCU_USBFS: USBFS clock \arg RCU_EXMC: EXMC clock \arg RCU_TIMERx (x = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13): TIMER clock \arg RCU_WWDGT: WWDGT clock \arg RCU_SPIx (x = 0, 1, 2, 3, 4, 5): SPI clock \arg RCU_USARTx (x = 0, 1, 2, 5): USART clock \arg RCU_UARTx (x = 3, 4, 6, 7): UART clock \arg RCU_I2Cx (x = 0, 1, 2): I2C clock \arg RCU_CANx (x = 0, 1): CAN clock \arg RCU_PMU: PMU clock \arg RCU_DAC: DAC clock \arg RCU_RTC: RTC clock \arg RCU_ADCx (x = 0, 1, 2): ADC clock \arg RCU_SDIO: SDIO clock \arg RCU_SYSCFG: SYSCFG clock \arg RCU_TLI: TLI clock \arg RCU_CTC: CTC clock \arg RCU_IREF: IREF clock \param[out] none \retval none */ void rcu_periph_clock_enable(rcu_periph_enum periph) { RCU_REG_VAL(periph) |= BIT(RCU_BIT_POS(periph)); } /* peripheral clock enable */ typedef enum { /* AHB1 peripherals */ RCU_GPIOA = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 0U), /*!< GPIOA clock */ RCU_GPIOB = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 1U), /*!< GPIOB clock */ RCU_GPIOC = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 2U), /*!< GPIOC clock */ RCU_GPIOD = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 3U), /*!< GPIOD clock */ RCU_GPIOE = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 4U), /*!< GPIOE clock */ RCU_GPIOF = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 5U), /*!< GPIOF clock */ RCU_GPIOG = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 6U), /*!< GPIOG clock */ RCU_GPIOH = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 7U), /*!< GPIOH clock */ RCU_GPIOI = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 8U), /*!< GPIOI clock */ RCU_CRC = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 12U), /*!< CRC clock */ RCU_BKPSRAM = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 18U), /*!< BKPSRAM clock */ RCU_TCMSRAM = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 20U), /*!< TCMSRAM clock */ RCU_DMA0 = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 21U), /*!< DMA0 clock */ RCU_DMA1 = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 22U), /*!< DMA1 clock */ RCU_IPA = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 23U), /*!< IPA clock */ RCU_ENET = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 25U), /*!< ENET clock */ RCU_ENETTX = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 26U), /*!< ENETTX clock */ RCU_ENETRX = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 27U), /*!< ENETRX clock */ RCU_ENETPTP = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 28U), /*!< ENETPTP clock */ RCU_USBHS = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 29U), /*!< USBHS clock */ RCU_USBHSULPI = RCU_REGIDX_BIT(AHB1EN_REG_OFFSET, 30U), /*!< USBHSULPI clock */ /* AHB2 peripherals */ RCU_DCI = RCU_REGIDX_BIT(AHB2EN_REG_OFFSET, 0U), /*!< DCI clock */ RCU_TRNG = RCU_REGIDX_BIT(AHB2EN_REG_OFFSET, 6U), /*!< TRNG clock */ RCU_USBFS = RCU_REGIDX_BIT(AHB2EN_REG_OFFSET, 7U), /*!< USBFS clock */ /* AHB3 peripherals */ RCU_EXMC = RCU_REGIDX_BIT(AHB3EN_REG_OFFSET, 0U), /*!< EXMC clock */ /* APB1 peripherals */ RCU_TIMER1 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 0U), /*!< TIMER1 clock */ RCU_TIMER2 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 1U), /*!< TIMER2 clock */ RCU_TIMER3 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 2U), /*!< TIMER3 clock */ RCU_TIMER4 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 3U), /*!< TIMER4 clock */ RCU_TIMER5 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 4U), /*!< TIMER5 clock */ RCU_TIMER6 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 5U), /*!< TIMER6 clock */ RCU_TIMER11 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 6U), /*!< TIMER11 clock */ RCU_TIMER12 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 7U), /*!< TIMER12 clock */ RCU_TIMER13 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 8U), /*!< TIMER13 clock */ RCU_WWDGT = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 11U), /*!< WWDGT clock */ RCU_SPI1 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 14U), /*!< SPI1 clock */ RCU_SPI2 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 15U), /*!< SPI2 clock */ RCU_USART1 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 17U), /*!< USART1 clock */ RCU_USART2 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 18U), /*!< USART2 clock */ RCU_UART3 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 19U), /*!< UART3 clock */ RCU_UART4 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 20U), /*!< UART4 clock */ RCU_I2C0 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 21U), /*!< I2C0 clock */ RCU_I2C1 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 22U), /*!< I2C1 clock */ RCU_I2C2 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 23U), /*!< I2C2 clock */ RCU_CAN0 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 25U), /*!< CAN0 clock */ RCU_CAN1 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 26U), /*!< CAN1 clock */ RCU_PMU = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 28U), /*!< PMU clock */ RCU_DAC = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 29U), /*!< DAC clock */ RCU_UART6 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 30U), /*!< UART6 clock */ RCU_UART7 = RCU_REGIDX_BIT(APB1EN_REG_OFFSET, 31U), /*!< UART7 clock */ RCU_RTC = RCU_REGIDX_BIT(BDCTL_REG_OFFSET, 15U), /*!< RTC clock */ /* APB2 peripherals */ RCU_TIMER0 = RCU_REGIDX_BIT(APB2EN_REG_OFFSET, 0U), /*!< TIMER0 clock */ RCU_TIMER7 = RCU_REGIDX_BIT(APB2EN_REG_OFFSET, 1U), /*!< TIMER7 clock */ RCU_USART0 = RCU_REGIDX_BIT(APB2EN_REG_OFFSET, 4U), /*!< USART0 clock */ RCU_USART5 = RCU_REGIDX_BIT(APB2EN_REG_OFFSET, 5U), /*!< USART5 clock */ RCU_ADC0 = RCU_REGIDX_BIT(APB2EN_REG_OFFSET, 8U), /*!< ADC0 clock */ RCU_ADC1 = RCU_REGIDX_BIT(APB2EN_REG_OFFSET, 9U), /*!< ADC1 clock */ RCU_ADC2 = RCU_REGIDX_BIT(APB2EN_REG_OFFSET, 10U), /*!< ADC2 clock */ RCU_SDIO = RCU_REGIDX_BIT(APB2EN_REG_OFFSET, 11U), /*!< SDIO clock */ RCU_SPI0 = RCU_REGIDX_BIT(APB2EN_REG_OFFSET, 12U), /*!< SPI0 clock */ RCU_SPI3 = RCU_REGIDX_BIT(APB2EN_REG_OFFSET, 13U), /*!< SPI3 clock */ RCU_SYSCFG = RCU_REGIDX_BIT(APB2EN_REG_OFFSET, 14U), /*!< SYSCFG clock */ RCU_TIMER8 = RCU_REGIDX_BIT(APB2EN_REG_OFFSET, 16U), /*!< TIMER8 clock */ RCU_TIMER9 = RCU_REGIDX_BIT(APB2EN_REG_OFFSET, 17U), /*!< TIMER9 clock */ RCU_TIMER10 = RCU_REGIDX_BIT(APB2EN_REG_OFFSET, 18U), /*!< TIMER10 clock */ RCU_SPI4 = RCU_REGIDX_BIT(APB2EN_REG_OFFSET, 20U), /*!< SPI4 clock */ RCU_SPI5 = RCU_REGIDX_BIT(APB2EN_REG_OFFSET, 21U), /*!< SPI5 clock */ RCU_TLI = RCU_REGIDX_BIT(APB2EN_REG_OFFSET, 26U), /*!< TLI clock */ /* APB1 additional peripherals */ RCU_CTC = RCU_REGIDX_BIT(ADD_APB1EN_REG_OFFSET, 27U), /*!< CTC clock */ RCU_IREF = RCU_REGIDX_BIT(ADD_APB1EN_REG_OFFSET, 31U), /*!< IREF clock */ }rcu_periph_enum;- 1
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那么毫无疑问 rcu_periph_clock_enable(RCU_GPIOC); 用来初始化GPIO的时钟
打开gd32f4xx_gpio.h
设置GPIO的工作模式/*! \brief set GPIO mode \param[in] gpio_periph: GPIO port only one parameter can be selected which is shown as below: \arg GPIOx(x = A,B,C,D,E,F,G,H,I) \param[in] mode: GPIO pin mode \arg GPIO_MODE_INPUT: input mode \arg GPIO_MODE_OUTPUT: output mode \arg GPIO_MODE_AF: alternate function mode \arg GPIO_MODE_ANALOG: analog mode \param[in] pull_up_down: GPIO pin with pull-up or pull-down resistor \arg GPIO_PUPD_NONE: floating mode, no pull-up and pull-down resistors \arg GPIO_PUPD_PULLUP: with pull-up resistor \arg GPIO_PUPD_PULLDOWN:with pull-down resistor \param[in] pin: GPIO pin one or more parameters can be selected which are shown as below: \arg GPIO_PIN_x(x=0..15), GPIO_PIN_ALL \param[out] none \retval none */ void gpio_mode_set(uint32_t gpio_periph, uint32_t mode, uint32_t pull_up_down, uint32_t pin)- 1
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完成后如下
#include "gd32f4xx.h" int main(void) { rcu_periph_clock_enable(RCU_GPIOC); gpio_mode_set(GPIOC,GPIO_MODE_OUTPUT,GPIO_PUPD_PULLUP,GPIO_PIN_0); gpio_output_options_set(GPIOC,GPIO_OTYPE_PP,GPIO_OSPEED_25MHZ,GPIO_PIN_0); gpio_bit_reset(GPIOC,GPIO_PIN_0); }- 1
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- 原文地址：https://blog.csdn.net/denghuajing/article/details/128048115
