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// 引脚功能(普通gpio，pwm，复用等)相关接口
#include "ls1c_public.h"
#include "ls1c_regs.h"
#include "ls1c_gpio.h"
#include "ls1c_pin.h"
/*
* 把指定pin设置为指定用途(普通gpio，非gpio)
* @gpio gpio引脚编号
* @purpose 用途
*/
void pin_set_purpose(unsigned int gpio, pin_purpose_t purpose)
{
volatile unsigned int *gpio_cfgx; // GPIO_CFGx寄存器
unsigned int pin = GPIO_GET_PIN(gpio);
gpio_cfgx = gpio_get_cfg_reg(gpio);
if (PIN_PURPOSE_GPIO == purpose) // 引脚用作普通gpio
{
reg_set_one_bit(gpio_cfgx, pin);
}
else // 引脚用作其它功能(非gpio)
{
reg_clr_one_bit(gpio_cfgx, pin);
}
return ;
}
/*
* 设置指定pin为第n复用
* @gpio gpio编号
* @remap 第n复用
*/
void pin_set_remap(unsigned int gpio, pin_remap_t remap)
{
volatile unsigned int *reg = NULL; // 复用寄存器
unsigned int port = GPIO_GET_PORT(gpio);
unsigned int pin = GPIO_GET_PIN(gpio);
int i;
/*指定全部pin复用为0*/
for (i = 0; i <= 4; i++)
{
reg = (volatile unsigned int *)((LS1C_CBUS_FIRST0) + ((port) * 0x04) + ((i) * 0x10));
// 置0
reg_clr_one_bit(reg, pin);
}
if (remap == PIN_REMAP_DEFAULT) return;
switch (port)
{
case 0:
switch (remap)
{
case PIN_REMAP_FIRST:
reg = (volatile unsigned int *)LS1C_CBUS_FIRST0;
break;
case PIN_REMAP_SECOND:
reg = (volatile unsigned int *)LS1C_CBUS_SECOND0;
break;
case PIN_REMAP_THIRD:
reg = (volatile unsigned int *)LS1C_CBUS_THIRD0;
break;
case PIN_REMAP_FOURTH:
reg = (volatile unsigned int *)LS1C_CBUS_FOURTH0;
break;
case PIN_REMAP_FIFTH:
reg = (volatile unsigned int *)LS1C_CBUS_FIFTH0;
break;
}
break;
case 1:
switch (remap)
{
case PIN_REMAP_FIRST:
reg = (volatile unsigned int *)LS1C_CBUS_FIRST1;
break;
case PIN_REMAP_SECOND:
reg = (volatile unsigned int *)LS1C_CBUS_SECOND1;
break;
case PIN_REMAP_THIRD:
reg = (volatile unsigned int *)LS1C_CBUS_THIRD1;
break;
case PIN_REMAP_FOURTH:
reg = (volatile unsigned int *)LS1C_CBUS_FOURTH1;
break;
case PIN_REMAP_FIFTH:
reg = (volatile unsigned int *)LS1C_CBUS_FIFTH1;
break;
}
break;
case 2:
switch (remap)
{
case PIN_REMAP_FIRST:
reg = (volatile unsigned int *)LS1C_CBUS_FIRST2;
break;
case PIN_REMAP_SECOND:
reg = (volatile unsigned int *)LS1C_CBUS_SECOND2;
break;
case PIN_REMAP_THIRD:
reg = (volatile unsigned int *)LS1C_CBUS_THIRD2;
break;
case PIN_REMAP_FOURTH:
reg = (volatile unsigned int *)LS1C_CBUS_FOURTH2;
break;
case PIN_REMAP_FIFTH:
reg = (volatile unsigned int *)LS1C_CBUS_FIFTH2;
break;
}
break;
case 3:
switch (remap)
{
case PIN_REMAP_FIRST:
reg = (volatile unsigned int *)LS1C_CBUS_FIRST3;
break;
case PIN_REMAP_SECOND:
reg = (volatile unsigned int *)LS1C_CBUS_SECOND3;
break;
case PIN_REMAP_THIRD:
reg = (volatile unsigned int *)LS1C_CBUS_THIRD3;
break;
case PIN_REMAP_FOURTH:
reg = (volatile unsigned int *)LS1C_CBUS_FOURTH3;
break;
case PIN_REMAP_FIFTH:
reg = (volatile unsigned int *)LS1C_CBUS_FIFTH3;
break;
}
break;
default:
return ;
}
// 置1
reg_set_one_bit(reg, pin);
return ;
}
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