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