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rt-thread-official/bsp/lpc54114-lite/drivers/drv_gpio.c

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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018-11-30 yangjie The first version for LPC54114
*/
#include <rthw.h>
#include <rtthread.h>
#include <rtdevice.h>
#include "fsl_gpio.h"
#include "LPC54114_cm4.h"
#include "core_cm4.h"
#include "fsl_inputmux.h"
#include "fsl_pint.h"
#include "fsl_iocon.h"
#ifdef RT_USING_PIN
#define get_port(x) (x / 32)
#define get_pin(x) (x % 32)
#define PIN_MAX_VAL 63
#define IRQ_MAX_VAL 8
struct rt_pin_irq_hdr pin_irq_hdr_tab[] =
{
{-1, 0, RT_NULL, RT_NULL},
{-1, 0, RT_NULL, RT_NULL},
{-1, 0, RT_NULL, RT_NULL},
{-1, 0, RT_NULL, RT_NULL},
{-1, 0, RT_NULL, RT_NULL},
{-1, 0, RT_NULL, RT_NULL},
{-1, 0, RT_NULL, RT_NULL},
{-1, 0, RT_NULL, RT_NULL},
};
static rt_base_t lpc_pin_get(const char *name)
{
rt_base_t pin = 0;
int hw_port_num, hw_pin_num = 0;
int i, name_len = 1;
int mul = 1;
name_len = rt_strlen(name);
if ((name_len < 4) || (name_len >= 6))
{
return -RT_EINVAL;
}
if ((name[0] != 'P') || (name[2] != '.'))
{
return -RT_EINVAL;
}
if ((name[1] >= '0') && (name[1] <= '9'))
{
hw_port_num = (int)(name[1] - '0');
}
else
{
return -RT_EINVAL;
}
for (i = name_len - 1; i > 2; i--)
{
hw_pin_num += ((int)(name[i] - '0') * mul);
mul = mul * 10;
}
pin = 32 * hw_port_num + hw_pin_num;
if ((pin > PIN_MAX_VAL) || (pin < 0))
{
return -RT_EINVAL;
}
return pin;
}
/* Configure pin mode. pin 0~63 means PIO0_0 ~ PIO1_31 */
static void lpc_pin_mode(rt_device_t dev, rt_base_t pin, rt_base_t mode)
{
int portx, piny, dir;
uint32_t pin_cfg;
if(pin > PIN_MAX_VAL)
return;
portx = get_port(pin);
piny = get_pin(pin);
switch(mode)
{
case PIN_MODE_OUTPUT:
dir = kGPIO_DigitalOutput;
pin_cfg = IOCON_FUNC0 | IOCON_DIGITAL_EN;
break;
case PIN_MODE_OUTPUT_OD:
dir = kGPIO_DigitalOutput;
pin_cfg = IOCON_FUNC0 | IOCON_OPENDRAIN_EN | IOCON_DIGITAL_EN;
break;
case PIN_MODE_INPUT:
dir = kGPIO_DigitalInput;
pin_cfg = IOCON_FUNC0 | IOCON_INPFILT_OFF | IOCON_DIGITAL_EN;
break;
case PIN_MODE_INPUT_PULLUP:
dir = kGPIO_DigitalInput;
pin_cfg = IOCON_FUNC0 | IOCON_INPFILT_OFF | IOCON_DIGITAL_EN | IOCON_MODE_PULLUP;
break;
case PIN_MODE_INPUT_PULLDOWN:
dir = kGPIO_DigitalInput;
pin_cfg = IOCON_FUNC0 | IOCON_INPFILT_OFF | IOCON_DIGITAL_EN | IOCON_MODE_PULLDOWN;
break;
default: break;
}
CLOCK_EnableClock(kCLOCK_Iocon);
IOCON_PinMuxSet(IOCON, portx, piny, pin_cfg);
GPIO_PortInit(GPIO, portx);
gpio_pin_config_t pin_config = {(gpio_pin_direction_t)dir, 0};
GPIO_PinInit(GPIO, portx, piny, &pin_config);
CLOCK_DisableClock(kCLOCK_Iocon);
}
static void lpc_pin_write(rt_device_t dev, rt_base_t pin, rt_base_t value)
{
int portx, piny;
portx = get_port(pin);
piny = get_pin(pin);
if(pin > PIN_MAX_VAL)
return;
GPIO_PinWrite(GPIO, portx, piny, value);
}
static int lpc_pin_read(rt_device_t dev, rt_base_t pin)
{
int portx, piny, value;
if(pin > PIN_MAX_VAL)
return RT_ERROR;
portx = get_port(pin);
piny = get_pin(pin);
value = (int)(GPIO_PinRead(GPIO, portx, piny));
return value;
}
static void pin_irq_hdr(pint_pin_int_t pintr, uint32_t pmatch_status)
{
int irqno = 0;
for(irqno = 0; irqno < IRQ_MAX_VAL; irqno ++)
{
if((irqno) == pintr)
{
break;
}
}
if(irqno >= IRQ_MAX_VAL)
return;
if (pin_irq_hdr_tab[irqno].hdr)
{
pin_irq_hdr_tab[irqno].hdr(pin_irq_hdr_tab[irqno].args);
}
}
void callback(pint_pin_int_t pintr, uint32_t pmatch_status)
{
pin_irq_hdr(pintr, pmatch_status);
}
static rt_err_t lpc_pin_attach_irq(struct rt_device *device, rt_int32_t pin,
rt_uint32_t mode, void (*hdr)(void *args), void *args)
{
int portx, piny, trigger_mode, pin_initx, pintsel, pin_cfg, i;
if(pin > PIN_MAX_VAL)
return RT_ERROR;
portx = get_port(pin);
piny = get_pin(pin);
switch (mode)
{
case PIN_IRQ_MODE_RISING:
trigger_mode = kPINT_PinIntEnableRiseEdge;
break;
case PIN_IRQ_MODE_FALLING:
trigger_mode = kPINT_PinIntEnableFallEdge;
break;
case PIN_IRQ_MODE_RISING_FALLING:
trigger_mode = kPINT_PinIntEnableBothEdges;
break;
case PIN_IRQ_MODE_HIGH_LEVEL:
trigger_mode = kPINT_PinIntEnableHighLevel;
break;
case PIN_IRQ_MODE_LOW_LEVEL:
trigger_mode = kPINT_PinIntEnableLowLevel;
break;
}
/* Get inputmux_connection_t */
pintsel = (pin + (0xC0U << 20));
for(i = 0; i < IRQ_MAX_VAL; i++)
{
if(pin_irq_hdr_tab[i].pin == -1)
{
pin_initx = kPINT_PinInt0 + i;
pin_irq_hdr_tab[i].pin = pin;
pin_irq_hdr_tab[i].mode = trigger_mode;
pin_irq_hdr_tab[i].hdr = hdr;
pin_irq_hdr_tab[i].args = args;
break;
}
}
if(i >= IRQ_MAX_VAL)
return RT_ERROR;
/* open clk */
CLOCK_EnableClock(kCLOCK_InputMux);
CLOCK_EnableClock(kCLOCK_Iocon);
/* AttachSignal */
INPUTMUX_AttachSignal(INPUTMUX, i, (inputmux_connection_t)pintsel);
pin_cfg = ((IOCON->PIO[portx][piny] &
(~(IOCON_PIO_FUNC_MASK | IOCON_PIO_DIGIMODE_MASK | IOCON_PIO_FILTEROFF_MASK))) /* Mask bits to zero which are setting */
| IOCON_PIO_FUNC(0) /* Selects pin function.: PORT18 (pin 28) is configured as PIO1_8 */
| IOCON_PIO_DIGIMODE(1) /* Select Analog/Digital mode.: Digital mode. */
| IOCON_PIO_FILTEROFF(0)); /* Controls input glitch filter.: Filter enabled. Noise pulses below approximately 10 ns are filtered out. */
IOCON_PinMuxSet(IOCON, portx, piny, pin_cfg);
/* PINT_PinInterruptConfig */
PINT_PinInterruptConfig(PINT, (pint_pin_int_t)pin_initx, (pint_pin_enable_t)(pin_irq_hdr_tab[i].mode), callback);
CLOCK_DisableClock(kCLOCK_InputMux);
CLOCK_DisableClock(kCLOCK_Iocon);
return RT_EOK;
}
static rt_err_t lpc_pin_detach_irq(struct rt_device *device, rt_int32_t pin)
{
int i;
if(pin > PIN_MAX_VAL)
return RT_ERROR;
for(i = 0; i < IRQ_MAX_VAL; i++)
{
if(pin_irq_hdr_tab[i].pin == pin)
{
pin_irq_hdr_tab[i].pin = -1;
pin_irq_hdr_tab[i].hdr = RT_NULL;
pin_irq_hdr_tab[i].mode = 0;
pin_irq_hdr_tab[i].args = RT_NULL;
break;
}
}
return RT_EOK;
}
static rt_err_t lpc_pin_irq_enable(struct rt_device *device, rt_base_t pin,
rt_uint32_t enabled)
{
int irqn_type, i;
if(pin > PIN_MAX_VAL)
return RT_ERROR;
for(i = 0; i < IRQ_MAX_VAL; i++)
{
if(pin_irq_hdr_tab[i].pin == pin)
{
switch(i)
{
case 0: irqn_type = PIN_INT0_IRQn; break;
case 1: irqn_type = PIN_INT1_IRQn; break;
case 2: irqn_type = PIN_INT2_IRQn; break;
case 3: irqn_type = PIN_INT3_IRQn; break;
case 4: irqn_type = PIN_INT4_IRQn; break;
case 5: irqn_type = PIN_INT5_IRQn; break;
case 6: irqn_type = PIN_INT6_IRQn; break;
case 7: irqn_type = PIN_INT7_IRQn; break;
default:break;
}
if(enabled)
{
/* PINT_EnableCallback */
PINT_PinInterruptClrStatusAll(PINT);
NVIC_ClearPendingIRQ((IRQn_Type)irqn_type);
PINT_PinInterruptClrStatus(PINT, (pint_pin_int_t)(kPINT_PinInt0 + i));
EnableIRQ((IRQn_Type)irqn_type);
}
else
{
/* PINT_DisableCallback */
DisableIRQ((IRQn_Type)irqn_type);
PINT_PinInterruptClrStatus(PINT, (pint_pin_int_t)(kPINT_PinInt0 + i));
NVIC_ClearPendingIRQ((IRQn_Type)irqn_type);
}
break;
}
}
if(i >= IRQ_MAX_VAL)
return RT_ERROR;
return RT_EOK;
}
const static struct rt_pin_ops _lpc_pin_ops =
{
lpc_pin_mode,
lpc_pin_write,
lpc_pin_read,
lpc_pin_attach_irq,
lpc_pin_detach_irq,
lpc_pin_irq_enable,
lpc_pin_get,
};
int rt_hw_pin_init(void)
{
int result;
PINT_Init(PINT);
result = rt_device_pin_register("pin", &_lpc_pin_ops, RT_NULL);
return result;
}
INIT_BOARD_EXPORT(rt_hw_pin_init);
#endif
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