void GPIO_Init(GPIO_TypeDef* GPIOx, uint8_t GPIO_Pin, GPIO_Mode_TypeDef GPIO_Mode)
{
/*----------------------*/
/* Check the parameters */
/*----------------------*/
assert_param(IS_GPIO_MODE(GPIO_Mode));
assert_param(IS_GPIO_PIN(GPIO_Pin));
/* Reset corresponding bit to GPIO_Pin in CR2 register */
GPIOx->CR2 &= (uint8_t)(~(GPIO_Pin));
/*-----------------------------*/
/* Input/Output mode selection */
/*-----------------------------*/
if ((((uint8_t)(GPIO_Mode)) & (uint8_t)0x80) != (uint8_t)0x00) /* Output mode */
{
if ((((uint8_t)(GPIO_Mode)) & (uint8_t)0x10) != (uint8_t)0x00) /* High level */
{
GPIOx->ODR |= GPIO_Pin;
} else /* Low level */
{
GPIOx->ODR &= (uint8_t)(~(GPIO_Pin));
}
/* Set Output mode */
GPIOx->DDR |= GPIO_Pin;
} else /* Input mode */
{
/* Set Input mode */
GPIOx->DDR &= (uint8_t)(~(GPIO_Pin));
}
/*------------------------------------------------------------------------*/
/* Pull-Up/Float (Input) or Push-Pull/Open-Drain (Output) modes selection */
/*------------------------------------------------------------------------*/
if ((((uint8_t)(GPIO_Mode)) & (uint8_t)0x40) != (uint8_t)0x00) /* Pull-Up or Push-Pull */
{
GPIOx->CR1 |= GPIO_Pin;
} else /* Float or Open-Drain */
{
GPIOx->CR1 &= (uint8_t)(~(GPIO_Pin));
}
/*-----------------------------------------------------*/
/* Interrupt (Input) or Slope (Output) modes selection */
/*-----------------------------------------------------*/
if ((((uint8_t)(GPIO_Mode)) & (uint8_t)0x20) != (uint8_t)0x00) /* Interrupt or Slow slope */
{
GPIOx->CR2 |= GPIO_Pin;
} else /* No external interrupt or No slope control */
{
GPIOx->CR2 &= (uint8_t)(~(GPIO_Pin));
}
}
/**
* @brief Initializes the GPIOx peripheral according to the specified
* parameters in the GPIO_InitStruct.
* @param GPIOx: where x can be (A, B or C) to select the GPIO peripheral.
* @param GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure that
* contains the configuration information for the specified GPIO
* peripheral.
* GPIO_Pin: selects the pin to be configured: GPIO_Pin_0 -> GPIO_Pin_7
* GPIO_Mode: selects the mode of the pin:
* - GPIO Analog Mode: GPIO_Mode_AN
* - GPIO Output Mode PP: GPIO_Mode_OUT_PP
* - GPIO Input Mode NOPULL: GPIO_Mode_IN
* - GPIO Output Mode OD: GPIO_Mode_OUT_OD
* - GPIO Input Mode PuPd: GPIO_Mode_IN_PUD
* - GPIO Alternate function Mode PP: GPIO_Mode_AF_PP
* - GPIO Alternate function Mode SPI SCLK PP: GPIO_Mode_AF_PP_SPI
* - GPIO Alternate function Mode OD: GPIO_Mode_AF_OD
* @retval None
*/
void GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct)
{
uint32_t currentmode = 0x00, currentpin = 0x00, pinpos = 0x00, pos = 0x00;
uint32_t tmpreg = 0x00, pinmask = 0x00;
/* Check the parameters */
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
assert_param(IS_GPIO_MODE(GPIO_InitStruct->GPIO_Mode));
assert_param(IS_GPIO_PIN(GPIO_InitStruct->GPIO_Pin));
/*---------------------------- GPIO Mode Configuration -----------------------*/
currentmode = ((uint32_t)GPIO_InitStruct->GPIO_Mode) & ((uint32_t)0x0F);
/*---------------------------- GPIO CRL Configuration ------------------------*/
/* Configure the four low port pins */
if (((uint32_t)GPIO_InitStruct->GPIO_Pin & ((uint32_t)0x0F)) != 0x00)
{
tmpreg = GPIOx->CRL;
for (pinpos = 0x00; pinpos < 0x04; pinpos++)
{
pos = ((uint32_t)0x01) << pinpos;
/* Get the port pins position */
currentpin = (GPIO_InitStruct->GPIO_Pin) & pos;
if (currentpin == pos)
{
pos = pinpos << 2;
/* Clear the corresponding low control register bits */
pinmask = ((uint32_t)0x0F) << pos;
tmpreg &= ~pinmask;
/* Write the mode configuration in the corresponding bits */
tmpreg |= (currentmode << pos);
}
}
GPIOx->CRL = tmpreg;
}
/*---------------------------- GPIO CRH Configuration ------------------------*/
/* Configure the four high port pins */
if (GPIO_InitStruct->GPIO_Pin > 0x0F)
{
tmpreg = GPIOx->CRH;
for (pinpos = 0x00; pinpos < 0x04; pinpos++)
{
pos = (((uint32_t)0x01) << (pinpos + 0x04));
/* Get the port pins position */
currentpin = ((GPIO_InitStruct->GPIO_Pin) & pos);
if (currentpin == pos)
{
pos = pinpos << 2;
/* Clear the corresponding high control register bits */
pinmask = ((uint32_t)0x0F) << pos;
tmpreg &= ~pinmask;
/* Write the mode configuration in the corresponding bits */
tmpreg |= (currentmode << pos);
}
}
GPIOx->CRH = tmpreg;
}
}
/**
* @brief Initializes the GPIOx peripheral according to the specified
* parameters in the GPIO_InitStruct.
��ʼ��GPIOx ����ͨ������GPIOx(����mode\speed\PuPd\otype)
* @param GPIOx: where x can be (A, B, C, D, E or H) to select the GPIO peripheral.
���� GPIOx(A, B, C, D, E or H)
* @param GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure that
* contains the configuration information for the specified GPIO
* peripheral.
* GPIO_Pin: selects the pin to be configured: GPIO_Pin_0 -> GPIO_Pin_15
* GPIO_Mode: selects the mode of the pin:
* - Input mode: GPIO_Mode_IN
* - Output mode: GPIO_Mode_OUT
* - Alternate Function mode: GPIO_Mode_AF
* - Analog mode: GPIO_Mode_AN
* GPIO_Speed: selects the speed of the pin if configured in Output:
* - Very Low: GPIO_Speed_400KHz
* - Low: GPIO_Speed_2MHz
* - Medium: GPIO_Speed_10MHz
* - High: GPIO_Speed_40MHz
* GPIO_OType: selects the Output type (if the selected mode is output):
* - Push-pull: GPIO_OType_PP
* - Open Drain: GPIO_OType_OD
* GPIO_PuPd: configures the Pull-up/Pull-down resistor on the pin:
* - pull-up: GPIO_PuPd_UP
* - pull-down: GPIO_PuPd_DOWN
* - Neither pull-up nor Pull-down: GPIO_PuPd_NOPULL
����Ϊ1��GPIO_TypeDef* GPIOx������GPIOx)�������������ļĴ�����
2��GPIO_InitTypeDef* GPIO_InitStruct ������д�û���Ҫ�����͡��ٶȡ����ģʽ�����������ȣ�
* @retval None
*/
void GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct)
{
uint32_t pinpos = 0x00, pos = 0x00 , currentpin = 0x00;
/* Check the parameters */
assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
assert_param(IS_GPIO_PIN(GPIO_InitStruct->GPIO_Pin));
assert_param(IS_GPIO_MODE(GPIO_InitStruct->GPIO_Mode));
assert_param(IS_GPIO_PUPD(GPIO_InitStruct->GPIO_PuPd));
/* -------------------------Configure the port pins---------------- */
/*-- GPIO Mode Configuration --*/
for (pinpos = 0x00; pinpos < 0x10; pinpos++)
{
pos = ((uint32_t)0x01) << pinpos;
/* Get the port pins position */
currentpin = (GPIO_InitStruct->GPIO_Pin) & pos;
if (currentpin == pos)
{
GPIOx->MODER &= ~(GPIO_MODER_MODER0 << (pinpos * 2));/*һ��pinռ2λ����˱����ƶ�pinpos * 2,�����*/
GPIOx->MODER |= (((uint32_t)GPIO_InitStruct->GPIO_Mode) << (pinpos * 2));/*һ��pinռ2λ����˱����ƶ�pinpos * 2,�ٸ�ֵ*/
if ((GPIO_InitStruct->GPIO_Mode == GPIO_Mode_OUT) || (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_AF))
{ /*��ѡ�����ģʽ����AFģʽ,�����ٶȡ�������͡�*/
/* Check Speed mode parameters */
assert_param(IS_GPIO_SPEED(GPIO_InitStruct->GPIO_Speed));
/* Speed mode configuration */
GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEEDR0 << (pinpos * 2));/*һ��pinռ2λ����˱����ƶ�pinpos * 2,�����*/
GPIOx->OSPEEDR |= ((uint32_t)(GPIO_InitStruct->GPIO_Speed) << (pinpos * 2));/*һ��pinռ2λ����˱����ƶ�pinpos * 2,�ٸ�ֵ*/
/*Check Output mode parameters */
assert_param(IS_GPIO_OTYPE(GPIO_InitStruct->GPIO_OType));
/* Output mode configuration */
GPIOx->OTYPER &= ~((GPIO_OTYPER_OT_0) << ((uint16_t)pinpos)) ;/*һ��pinռ1λ����˱����ƶ�pinpos ,�����*/
GPIOx->OTYPER |= (uint16_t)(((uint16_t)GPIO_InitStruct->GPIO_OType) << ((uint16_t)pinpos));/*һ��pinռ1λ����˱����ƶ�pinpos ,�ٸ�ֵ*/
}
/*������*/
/* Pull-up Pull down resistor configuration */
GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << ((uint16_t)pinpos * 2));/*һ��pinռ2λ����˱����ƶ�pinpos * 2,�����*/
GPIOx->PUPDR |= (((uint32_t)GPIO_InitStruct->GPIO_PuPd) << (pinpos * 2));/*һ��pinռ2λ����˱����ƶ�pinpos*2 ,�ٸ�ֵ*/
}
}
}
void GPIO_Init(GPIO_InitTypeDef* GPIO_InitStruct)
{
int pin_reg = 0,mode_reg;
/* Check the parameters */
assert_param(IS_GPIO_MODE(GPIO_InitStruct->GPIO_Mode));
assert_param(IS_GPIO_PIN(GPIO_InitStruct->GPIO_Pin));
/* set ADDR_GPIO_PIN_MUX_CTRL Register*/
pin_reg = NST_RD_PWM_REG(ADDR_GPIO_PIN_MUX_CTRL);
pin_reg |= GPIO_InitStruct->GPIO_Pin;
/* set SWPORTA_DDR Register*/
mode_reg = NST_RD_GPIO_REG(SWPORTA_DDR);
if(GPIO_InitStruct->GPIO_Mode){
mode_reg |= GPIO_InitStruct->GPIO_Pin;
} else {
mode_reg &= ~GPIO_InitStruct->GPIO_Pin;
}
NST_WR_PWM_REG(ADDR_GPIO_PIN_MUX_CTRL, pin_reg);
NST_WR_GPIO_REG(SWPORTA_DDR, mode_reg);
}
STATIC mp_obj_t pin_obj_init_helper(const pin_obj_t *self, uint n_args, const mp_obj_t *args, mp_map_t *kw_args) {
// parse args
mp_arg_val_t vals[PIN_INIT_NUM_ARGS];
mp_arg_parse_all(n_args, args, kw_args, PIN_INIT_NUM_ARGS, pin_init_args, vals);
// get io mode
uint mode = vals[0].u_int;
if (!IS_GPIO_MODE(mode)) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "invalid pin mode: %d", mode));
}
// get pull mode
uint pull = vals[1].u_int;
if (!IS_GPIO_PULL(pull)) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "invalid pin pull: %d", pull));
}
// get af (alternate function)
mp_int_t af = vals[2].u_int;
if ((mode == GPIO_MODE_AF_PP || mode == GPIO_MODE_AF_OD) && !IS_GPIO_AF(af)) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "invalid pin af: %d", af));
}
// enable the peripheral clock for the port of this pin
switch (self->port) {
#ifdef __GPIOA_CLK_ENABLE
case PORT_A: __GPIOA_CLK_ENABLE(); break;
#endif
#ifdef __GPIOB_CLK_ENABLE
case PORT_B: __GPIOB_CLK_ENABLE(); break;
#endif
#ifdef __GPIOC_CLK_ENABLE
case PORT_C: __GPIOC_CLK_ENABLE(); break;
#endif
#ifdef __GPIOD_CLK_ENABLE
case PORT_D: __GPIOD_CLK_ENABLE(); break;
#endif
#ifdef __GPIOE_CLK_ENABLE
case PORT_E: __GPIOE_CLK_ENABLE(); break;
#endif
#ifdef __GPIOF_CLK_ENABLE
case PORT_F: __GPIOF_CLK_ENABLE(); break;
#endif
#ifdef __GPIOG_CLK_ENABLE
case PORT_G: __GPIOG_CLK_ENABLE(); break;
#endif
#ifdef __GPIOH_CLK_ENABLE
case PORT_H: __GPIOH_CLK_ENABLE(); break;
#endif
#ifdef __GPIOI_CLK_ENABLE
case PORT_I: __GPIOI_CLK_ENABLE(); break;
#endif
#ifdef __GPIOJ_CLK_ENABLE
case PORT_J: __GPIOJ_CLK_ENABLE(); break;
#endif
}
// configure the GPIO as requested
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.Pin = self->pin_mask;
GPIO_InitStructure.Mode = mode;
GPIO_InitStructure.Pull = pull;
GPIO_InitStructure.Speed = GPIO_SPEED_FAST;
GPIO_InitStructure.Alternate = af;
HAL_GPIO_Init(self->gpio, &GPIO_InitStructure);
return mp_const_none;
}
