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rt-thread-official/bsp/nuvoton/libraries/m031/rtt_port/drv_gpio.c

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/**************************************************************************//**
*
* @copyright (C) 2020 Nuvoton Technology Corp. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-9-4 Philo First version
*
******************************************************************************/
#include <rtconfig.h>
#if (defined(BSP_USING_GPIO) && defined(RT_USING_PIN))
#include <rtdevice.h>
#include <rthw.h>
#include "NuMicro.h"
#include <nu_bitutil.h>
#include <drv_gpio.h>
#include <stdlib.h>
/* Private define ---------------------------------------------------------------*/
#define PORT_OFFSET 0x40
#define IRQ_MAX_NUM 16 //Max support 32
#define MAX_PORTH_PIN_MAX 11
/* Private functions ------------------------------------------------------------*/
static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode);
static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t value);
static int nu_gpio_read(struct rt_device *device, rt_base_t pin);
static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint32_t mode, void (*hdr)(void *args), void *args);
static rt_err_t nu_gpio_detach_irq(struct rt_device *device, rt_int32_t pin);
static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled);
static rt_base_t nu_gpio_get(const char *name);
/* Private variables ------------------------------------------------------------*/
static struct rt_pin_irq_hdr pin_irq_hdr_tab[IRQ_MAX_NUM];
static struct rt_pin_ops nu_gpio_ops =
{
nu_gpio_mode,
nu_gpio_write,
nu_gpio_read,
nu_gpio_attach_irq,
nu_gpio_detach_irq,
nu_gpio_irq_enable,
nu_gpio_get,
};
static rt_uint32_t g_u32PinIrqMask = 0x0;
/* Functions define ------------------------------------------------------------*/
static rt_err_t nu_port_check(rt_int32_t pin)
{
if (NU_GET_PORT(pin) >= NU_PORT_CNT)
return -(RT_ERROR);
else if ((NU_GET_PORT(pin) == NU_PH) && (NU_GET_PINS(pin) > MAX_PORTH_PIN_MAX))
return -(RT_ERROR);
return RT_EOK;
}
static rt_int32_t nu_find_irqindex(rt_uint32_t pin_index)
{
rt_int32_t irqindex;
rt_int32_t u32PinIrqStatus = g_u32PinIrqMask;
// Find index of pin is attached in pool.
while ((irqindex = nu_ctz(u32PinIrqStatus)) < IRQ_MAX_NUM) // Count Trailing Zeros ==> Find First One
{
if (pin_irq_hdr_tab[irqindex].pin == pin_index)
return irqindex;
u32PinIrqStatus &= ~(1 << irqindex);
}
return -(RT_ERROR);
}
static void pin_irq_hdr(rt_uint32_t irq_status, rt_uint32_t port_index)
{
rt_int32_t irqindex, i;
rt_int32_t pinindex = port_index * GPIO_PIN_MAX ;
while ((i = nu_ctz(irq_status)) < GPIO_PIN_MAX)// Count Trailing Zeros ==> Find First One
{
int pin_mask = (1 << i);
irqindex = nu_find_irqindex(pinindex + i);
if (irqindex != -(RT_ERROR))
{
if (pin_irq_hdr_tab[irqindex].hdr)
{
pin_irq_hdr_tab[irqindex].hdr(pin_irq_hdr_tab[irqindex].args);
}
}
// Clear the served bit.
irq_status &= ~pin_mask;
}
}
static void nu_gpio_mode(struct rt_device *device, rt_base_t pin, rt_base_t mode)
{
GPIO_T *PORT;
if (nu_port_check(pin))
return;
PORT = (GPIO_T *)(PA_BASE + (NU_GET_PORT(pin) * PORT_OFFSET));
if (mode == PIN_MODE_OUTPUT)
{
GPIO_SetMode(PORT, NU_GET_PIN_MASK(NU_GET_PINS(pin)), GPIO_MODE_OUTPUT);
}
else if (mode == PIN_MODE_INPUT)
{
GPIO_SetMode(PORT, NU_GET_PIN_MASK(NU_GET_PINS(pin)), GPIO_MODE_INPUT);
}
else if (mode == PIN_MODE_OUTPUT_OD)
{
GPIO_SetMode(PORT, NU_GET_PIN_MASK(NU_GET_PINS(pin)), GPIO_MODE_OPEN_DRAIN);
}
#if 0
else if (mode == PIN_MODE_INPUT_PULLUP)
{
GPIO_SetMode(PORT, NU_GET_PIN_MASK(NU_GET_PINS(pin)), GPIO_MODE_INPUT);
}
else if (mode == PIN_MODE_INPUT_PULLDOWN)
{
GPIO_SetMode(PORT, NU_GET_PIN_MASK(NU_GET_PINS(pin)), GPIO_MODE_INPUT);
}
#else
else
{
rt_kprintf("M031 not support this GPIO mode\n");
}
#endif
}
static void nu_gpio_write(struct rt_device *device, rt_base_t pin, rt_base_t value)
{
if (nu_port_check(pin))
return;
GPIO_PIN_DATA(NU_GET_PORT(pin), NU_GET_PINS(pin)) = value;
}
static int nu_gpio_read(struct rt_device *device, rt_base_t pin)
{
if (nu_port_check(pin))
return PIN_LOW;
return GPIO_PIN_DATA(NU_GET_PORT(pin), NU_GET_PINS(pin));
}
static rt_err_t nu_gpio_attach_irq(struct rt_device *device, rt_int32_t pin, rt_uint32_t mode, void (*hdr)(void *args), void *args)
{
rt_base_t level;
rt_int32_t irqindex;
if (nu_port_check(pin))
return -(RT_ERROR);
level = rt_hw_interrupt_disable();
// Find index of pin is attached in pool.
if ((irqindex = nu_find_irqindex(pin)) >= 0)
goto exit_nu_gpio_attach_irq;
// Find available index of pin in pool.
if ((irqindex = nu_cto(g_u32PinIrqMask)) < IRQ_MAX_NUM) // Count Trailing Ones ==> Find First Zero
goto exit_nu_gpio_attach_irq;
rt_hw_interrupt_enable(level);
return -(RT_EBUSY);
exit_nu_gpio_attach_irq:
pin_irq_hdr_tab[irqindex].pin = pin;
pin_irq_hdr_tab[irqindex].hdr = hdr;
pin_irq_hdr_tab[irqindex].mode = mode;
pin_irq_hdr_tab[irqindex].args = args;
g_u32PinIrqMask |= (1 << irqindex);
rt_hw_interrupt_enable(level);
return RT_EOK;
}
static rt_err_t nu_gpio_detach_irq(struct rt_device *device, rt_int32_t pin)
{
rt_base_t level;
rt_int32_t irqindex;
rt_int32_t u32PinIrqStatus;
if (nu_port_check(pin))
return -(RT_ERROR);
level = rt_hw_interrupt_disable();
u32PinIrqStatus = g_u32PinIrqMask;
// Find index of pin is attached in pool.
while ((irqindex = nu_ctz(u32PinIrqStatus)) < IRQ_MAX_NUM)// Count Trailing Zeros ==> Find First One
{
if (pin_irq_hdr_tab[irqindex].pin == pin)
{
pin_irq_hdr_tab[irqindex].pin = PIN_IRQ_PIN_NONE;
pin_irq_hdr_tab[irqindex].hdr = RT_NULL;
pin_irq_hdr_tab[irqindex].mode = PIN_IRQ_MODE_RISING;
pin_irq_hdr_tab[irqindex].args = RT_NULL;
g_u32PinIrqMask &= ~(1 << irqindex);
break;
}
u32PinIrqStatus &= ~(1 << irqindex);
}
rt_hw_interrupt_enable(level);
return RT_EOK;
}
static rt_err_t nu_gpio_irq_enable(struct rt_device *device, rt_base_t pin, rt_uint32_t enabled)
{
GPIO_T *PORT;
rt_base_t level;
uint32_t u32IntAttribs;
rt_int32_t irqindex;
rt_err_t ret = RT_EOK;
if (nu_port_check(pin))
return -(RT_ERROR);
level = rt_hw_interrupt_disable();
irqindex = nu_find_irqindex(pin);
if (irqindex == -(RT_ERROR))
{
ret = RT_ERROR;
goto exit_nu_gpio_irq_enable;
}
PORT = (GPIO_T *)(PA_BASE + (NU_GET_PORT(pin) * PORT_OFFSET));
if (enabled == PIN_IRQ_ENABLE)
{
if (pin_irq_hdr_tab[irqindex].mode == PIN_IRQ_MODE_RISING)
u32IntAttribs = GPIO_INT_RISING;
else if (pin_irq_hdr_tab[irqindex].mode == PIN_IRQ_MODE_FALLING)
u32IntAttribs = GPIO_INT_FALLING;
else if (pin_irq_hdr_tab[irqindex].mode == PIN_IRQ_MODE_RISING_FALLING)
u32IntAttribs = GPIO_INT_BOTH_EDGE;
else if (pin_irq_hdr_tab[irqindex].mode == PIN_IRQ_MODE_HIGH_LEVEL)
u32IntAttribs = GPIO_INT_HIGH;
else if (pin_irq_hdr_tab[irqindex].mode == PIN_IRQ_MODE_LOW_LEVEL)
u32IntAttribs = GPIO_INT_LOW;
else
goto exit_nu_gpio_irq_enable;
GPIO_EnableInt(PORT, NU_GET_PINS(pin), u32IntAttribs);
if ((NU_GET_PORT(pin) == NU_PA) || (NU_GET_PORT(pin) == NU_PB) || (NU_GET_PORT(pin) == NU_PG) || (NU_GET_PORT(pin) == NU_PH))
{
NVIC_EnableIRQ(GPIO_PAPBPGPH_IRQn);
}
else
{
NVIC_EnableIRQ(GPIO_PCPDPEPF_IRQn);
}
}
else
{
GPIO_DisableInt(PORT, NU_GET_PINS(pin));
}
exit_nu_gpio_irq_enable:
rt_hw_interrupt_enable(level);
return -(ret);
}
static rt_base_t nu_gpio_get(const char *name)
{
/* Get pin number by name,such as PA.0, PF12 */
if ((name[2] == '\0')||((name[2] == '.')&&(name[3] == '\0')))
return -(RT_EINVAL);
long number;
if ((name[2] == '.'))
number = atol(&name[3]);
else
number = atol(&name[2]);
if (number > 15)
return -(RT_EINVAL);
if (name[1] >= 'A' && name[1] <= 'H')
return ((name[1] - 'A') * 0x10) + number;
if (name[1] >= 'a' && name[1] <= 'h')
return ((name[1] - 'a') * 0x10) + number;
return -(RT_EINVAL);
}
int rt_hw_gpio_init(void)
{
rt_int32_t irqindex;
for (irqindex = 0; irqindex < IRQ_MAX_NUM ; irqindex++)
{
pin_irq_hdr_tab[irqindex].pin = PIN_IRQ_PIN_NONE;
pin_irq_hdr_tab[irqindex].hdr = RT_NULL;
pin_irq_hdr_tab[irqindex].mode = PIN_IRQ_MODE_RISING;
pin_irq_hdr_tab[irqindex].args = RT_NULL;
}
return rt_device_pin_register("gpio", &nu_gpio_ops, RT_NULL);
}
INIT_BOARD_EXPORT(rt_hw_gpio_init);
void GPABGH_IRQHandler(void)
{
rt_uint32_t int_status;
rt_interrupt_enter();
int_status = PA->INTSRC;
if (int_status)
{
pin_irq_hdr(int_status, NU_PA);
PA->INTSRC = int_status;
}
int_status = PB->INTSRC;
if (int_status)
{
pin_irq_hdr(int_status, NU_PB);
PB->INTSRC = int_status;
}
int_status = PG->INTSRC;
if (int_status)
{
pin_irq_hdr(int_status, NU_PG);
PG->INTSRC = int_status;
}
int_status = PH->INTSRC;
if (int_status)
{
pin_irq_hdr(int_status, NU_PH);
PH->INTSRC = int_status;
}
rt_interrupt_leave();
}
void GPCDEF_IRQHandler(void)
{
rt_uint32_t int_status;
rt_interrupt_enter();
int_status = PC->INTSRC;
if (int_status)
{
pin_irq_hdr(int_status, NU_PC);
PC->INTSRC = int_status;
}
int_status = PD->INTSRC;
if (int_status)
{
pin_irq_hdr(int_status, NU_PD);
PD->INTSRC = int_status;
}
int_status = PE->INTSRC;
if (int_status)
{
pin_irq_hdr(int_status, NU_PE);
PE->INTSRC = int_status;
}
int_status = PF->INTSRC;
if (int_status)
{
pin_irq_hdr(int_status, NU_PF);
PF->INTSRC = int_status;
}
rt_interrupt_leave();
}
#endif //#if (defined(BSP_USING_GPIO) && defined(RT_USING_PIN))
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