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rt-thread-official/bsp/ti/c28x/libraries/HAL_Drivers/drv_gpio.c

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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-08-28 qiyu first version
*/
#include <rthw.h>
#include "drv_gpio.h"
#include "F2837xD_device.h"
#include "F28x_Project.h" // Device Headerfile and Examples Include File
#ifdef RT_USING_PIN
// the gpio pin number for each port is 32, while it is 16 for ARM
#define PIN_NUM(port, no) (((((port) & 0xFu) << 5) | ((no) & 0x1F)))
#define PIN_PORT(pin) ((rt_uint16_t)(((pin) >> 5) & 0xFu))
#define PIN_NO(pin) ((rt_uint16_t)((pin) & 0x1Fu))
#define PIN_c28x_PORT(pin) (volatile Uint32 *)&GpioDataRegs + (PIN_PORT(pin))*GPY_DATA_OFFSET
#define PIN_c28x_PIN(pin) ((rt_uint32_t)(1u << PIN_NO(pin)))
#define PIN_c28x_PORT_MAX 6 /* gpioA to GPIOF in total*/
#define PIN_IRQ_MAX 5 /* XINT1 to XINT5 in total */
static rt_err_t c28x_pin_attach_irq(struct rt_device *device, rt_base_t pin,
rt_uint8_t mode, void (*hdr)(void *args), void *args);
static rt_err_t c28x_pin_dettach_irq(struct rt_device *device, rt_base_t pin);
static rt_err_t c28x_pin_irq_enable(struct rt_device *device, rt_base_t pin,
rt_uint8_t enabled);
static rt_base_t c28x_pin_get(const char *name)
{
int hw_pin_num = 0;
int i, name_len;
name_len = rt_strlen(name);
if ((name_len < 3) || (name_len >= 7))
{
return -RT_EINVAL;
}
/*
* PX.y
*/
if ((name[0] != 'P') || (name[2] != '.'))
{
return -RT_EINVAL;
}
for (i = 3; i < name_len; i++)
{
hw_pin_num *= 10;
hw_pin_num += name[i] - '0';
}
return hw_pin_num;
}
static void c28x_pin_write(rt_device_t dev, rt_base_t pin, rt_uint8_t value)
{
volatile Uint32 *gpioDataReg;
Uint32 pinMask;
if (PIN_PORT(pin) < PIN_c28x_PORT_MAX)
{
gpioDataReg = PIN_c28x_PORT(pin);
pinMask = 1UL << (PIN_NO(pin));
if (value == 0)
{
gpioDataReg[GPYCLEAR] = pinMask;
}
else
{
gpioDataReg[GPYSET] = pinMask;
}
}
}
static rt_int8_t c28x_pin_read(rt_device_t dev, rt_base_t pin)
{
volatile Uint32 *gpioDataReg;
rt_int8_t value = PIN_LOW;
if (PIN_PORT(pin) < PIN_c28x_PORT_MAX)
{
gpioDataReg = PIN_c28x_PORT(pin);
value = (gpioDataReg[GPYDAT] >> PIN_NO(pin)) & 0x1;
}
return value;
}
static void c28x_pin_mode(rt_device_t dev, rt_base_t pin, rt_uint8_t mode)
{
volatile Uint32 *gpioBaseAddr;
volatile Uint32 *dir, *pud, *odr;
if (PIN_PORT(pin) >= PIN_c28x_PORT_MAX)
{
return;
}
rt_uint32_t pinMask;
pinMask = 1UL << PIN_NO(pin);
gpioBaseAddr = (Uint32 *)&GpioCtrlRegs + (PIN_PORT(pin))*GPY_CTRL_OFFSET;
dir = gpioBaseAddr + GPYDIR;
pud = gpioBaseAddr + GPYPUD;
odr = gpioBaseAddr + GPYODR;
EALLOW;
if (mode == PIN_MODE_OUTPUT)
{
*dir |= pinMask;
}
else if (mode == PIN_MODE_INPUT)
{
*dir &= ~pinMask;
}
else if (mode == PIN_MODE_INPUT_PULLUP)
{
*dir &= ~pinMask;
*pud &= ~pinMask;
}
else if (mode == PIN_MODE_INPUT_PULLDOWN)
{
/* input setting: pull down. */
*dir &= ~pinMask;
*pud |= pinMask;
}
else if (mode == PIN_MODE_OUTPUT_OD)
{
/* output setting: od. */
*dir |= pinMask;
*odr |= pinMask;
}
EDIS;
}
const static struct rt_pin_ops _c28x_pin_ops =
{
c28x_pin_mode,
c28x_pin_write,
c28x_pin_read,
c28x_pin_attach_irq,
c28x_pin_dettach_irq,
c28x_pin_irq_enable,
c28x_pin_get,
};
int rt_hw_pin_init(void)
{
return rt_device_pin_register("pin", &_c28x_pin_ops, RT_NULL);
}
static 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},
};
static rt_int16_t pin_irq_xint_tab[] =
{
BSP_XINT1_PIN,
BSP_XINT2_PIN,
BSP_XINT3_PIN,
BSP_XINT4_PIN,
BSP_XINT5_PIN
};
rt_inline rt_int32_t get_irq_index(rt_uint32_t pin)
{
int i;
for(i = 0 ; i < PIN_IRQ_MAX ; i++)
{
if(pin_irq_xint_tab[i] == pin)
{
return i;
}
}
return -1;
}
#define ITEM_NUM(items) sizeof(items) / sizeof(items[0])
static rt_err_t c28x_pin_attach_irq(struct rt_device *device, rt_base_t pin,
rt_uint8_t mode, void (*hdr)(void *args), void *args)
{
rt_base_t level;
rt_int32_t irqindex = -1;
if (PIN_PORT(pin) >= PIN_c28x_PORT_MAX)
{
return -RT_ENOSYS;
}
irqindex = get_irq_index(pin);
level = rt_hw_interrupt_disable();
if (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)
{
rt_hw_interrupt_enable(level);
return RT_EOK;
}
if (pin_irq_hdr_tab[irqindex].pin != -1)
{
rt_hw_interrupt_enable(level);
return -RT_EBUSY;
}
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;
rt_hw_interrupt_enable(level);
return RT_EOK;
}
static rt_err_t c28x_pin_dettach_irq(struct rt_device *device, rt_base_t pin)
{
rt_base_t level;
rt_int32_t irqindex = -1;
rt_uint16_t i;
if (PIN_PORT(pin) >= PIN_c28x_PORT_MAX)
{
return -RT_ENOSYS;
}
for(i = 0 ; i < PIN_IRQ_MAX ; i++)
{
if(pin_irq_hdr_tab[i].pin == pin)
{
irqindex = i;
break;
}
}
if (irqindex == -1)
{
return -RT_ENOSYS;
}
level = rt_hw_interrupt_disable();
pin_irq_hdr_tab[irqindex].pin = -1;
pin_irq_hdr_tab[irqindex].hdr = RT_NULL;
pin_irq_hdr_tab[irqindex].mode = 0;
pin_irq_hdr_tab[irqindex].args = RT_NULL;
rt_hw_interrupt_enable(level);
return RT_EOK;
}
static rt_err_t c28x_pin_irq_enable(struct rt_device *device, rt_base_t pin,
rt_uint8_t enabled)
{
rt_base_t level;
rt_int32_t irqindex = -1;
rt_uint16_t channel;
rt_uint16_t edge_mode,pin_mode;
if (PIN_PORT(pin) >= PIN_c28x_PORT_MAX)
{
return -RT_ENOSYS;
}
irqindex = get_irq_index(pin);
/* irqindex+1 = channel*/
if (irqindex < 0 || irqindex >= PIN_IRQ_MAX)
{
return -RT_ENOSYS;
}
if (enabled == PIN_IRQ_ENABLE)
{
level = rt_hw_interrupt_disable();
if (pin_irq_hdr_tab[irqindex].pin == -1)
{
rt_hw_interrupt_enable(level);
return -RT_ENOSYS;
}
/*
* 1. set the edge mode of interrupt triggering
* 2. set the GPIO mode
* 3. enable XINT channel and set the input source
*/
channel = irqindex+1;
switch (pin_irq_hdr_tab[irqindex].mode)
{
case PIN_IRQ_MODE_RISING:
edge_mode = 1;
pin_mode = PIN_MODE_INPUT_PULLDOWN;
break;
case PIN_IRQ_MODE_FALLING:
edge_mode = 0;
pin_mode = PIN_MODE_INPUT_PULLUP;
break;
case PIN_IRQ_MODE_RISING_FALLING:
edge_mode = 3;
pin_mode = PIN_MODE_INPUT;
break;
}
if(channel == 1)
{
XintRegs.XINT1CR.bit.ENABLE = 1; // Enable XINT1
EALLOW;
InputXbarRegs.INPUT4SELECT = pin; //Set XINT1 source to GPIO-pin
EDIS;
XintRegs.XINT1CR.bit.POLARITY = edge_mode; // Falling edge interrupt
}
else if(channel == 2)
{
XintRegs.XINT2CR.bit.ENABLE = 1; // Enable XINT2
EALLOW;
InputXbarRegs.INPUT5SELECT = pin; //Set XINT1 source to GPIO-pin
EDIS;
XintRegs.XINT2CR.bit.POLARITY = edge_mode; // Falling edge interrupt
}
else if(channel == 3)
{
XintRegs.XINT3CR.bit.ENABLE = 1; // Enable XINT2
EALLOW;
InputXbarRegs.INPUT6SELECT = pin; //Set XINT1 source to GPIO-pin
EDIS;
XintRegs.XINT3CR.bit.POLARITY = edge_mode; // Falling edge interrupt
}
else if(channel == 4)
{
XintRegs.XINT4CR.bit.ENABLE = 1; // Enable XINT2
EALLOW;
InputXbarRegs.INPUT13SELECT = pin; //Set XINT1 source to GPIO-pin
EDIS;
XintRegs.XINT4CR.bit.POLARITY = edge_mode; // Falling edge interrupt
}
else if(channel == 5)
{
XintRegs.XINT5CR.bit.ENABLE = 1; // Enable XINT2
EALLOW;
InputXbarRegs.INPUT14SELECT = pin; //Set XINT1 source to GPIO-pin
EDIS;
XintRegs.XINT5CR.bit.POLARITY = edge_mode; // Falling edge interrupt
}
c28x_pin_mode(device, pin, pin_mode);
rt_hw_interrupt_enable(level);
}
else if (enabled == PIN_IRQ_DISABLE)
{
level = rt_hw_interrupt_disable();
channel = irqindex+1;
/*
* TODO modify this simpler
*/
if(channel == 1)
{
XintRegs.XINT1CR.bit.ENABLE = 0; // Disable XINT1
}
else if(channel == 2)
{
XintRegs.XINT2CR.bit.ENABLE = 0; // Disable XINT2
}
else if(channel == 3)
{
XintRegs.XINT3CR.bit.ENABLE = 0; // Disable XINT2
}
else if(channel == 4)
{
XintRegs.XINT4CR.bit.ENABLE = 0; // Disable XINT2
}
else if(channel == 5)
{
XintRegs.XINT5CR.bit.ENABLE = 0; // Disable XINT2
}
rt_hw_interrupt_enable(level);
}
else
{
return -RT_ENOSYS;
}
return RT_EOK;
}
void GPIO_XINT_Callback(rt_int16_t XINT_number);
interrupt void XINT1_Handler(void)
{
rt_interrupt_enter();
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
GPIO_XINT_Callback(1);
rt_interrupt_leave();
}
interrupt void XINT2_Handler(void)
{
rt_interrupt_enter();
GPIO_XINT_Callback(2);
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
rt_interrupt_leave();
}
interrupt void XINT3_Handler(void)
{
rt_interrupt_enter();
GPIO_XINT_Callback(3);
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
rt_interrupt_leave();
}
interrupt void XINT4_Handler(void)
{
rt_interrupt_enter();
GPIO_XINT_Callback(4);
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
rt_interrupt_leave();
}
interrupt void XINT5_Handler(void)
{
rt_interrupt_enter();
GPIO_XINT_Callback(5);
PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
rt_interrupt_leave();
}
void GPIO_XINT_Callback(rt_int16_t XINT_number)
{
rt_int32_t irqindex = XINT_number - 1;
if(pin_irq_hdr_tab[irqindex].hdr)
{
pin_irq_hdr_tab[irqindex].hdr(pin_irq_hdr_tab[irqindex].args);
}
}
#endif /* RT_USING_PIN */
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