s5pv210 uart完善更新

昨天傻了 所以弄的挺乱的 这里主要做了一些改进 主要是完善地址表 其他不多说了 直接上代码吧

//cpu_io.h 主要负责读取寄存器值

#ifndef _S5PV210_CPU_LCQ_H #define _S5PV210_CPU_LCQ_H #define _REG(adr) (*(volatile unsigned int *)(adr)) #define readb(adr) (*(volatile unsigned char *)(adr)) #define readw(adr) (*(volatile unsigned short *)(adr)) #define readl(adr) (*(volatile unsigned int *)(adr)) #define writeb(value,adr) ((*(volatile unsigned char *)(adr))=(value)) #define writew(value,adr) ((*(volatile unsigned short *)(adr))=(value)) #define writel(value,adr) ((*(volatile unsigned int*)(adr))=(value)) #endif

//GPIO.H //地址表 方便以后使用

#ifndef _ASM_ARCH_GPIO_LCQ_H #define _ASM_ARCH_GPIO_LCQ_H #define S5PV210_GPIOBASE (0XE0200000) #define S5PV210_UARTBASE (0xE2900000) struct s5pc210_gpio_bank { unsigned int con; unsigned int dat; unsigned int pud; unsigned int drv; unsigned int con_pdn; unsigned int pud_pdn; unsigned char res1[8]; }; struct s5pv210_gpio { struct s5pc210_gpio_bank gpio_a0; struct s5pc210_gpio_bank gpio_a1; struct s5pc210_gpio_bank gpio_b; struct s5pc210_gpio_bank gpio_c0; struct s5pc210_gpio_bank gpio_c1; struct s5pc210_gpio_bank gpio_d0; struct s5pc210_gpio_bank gpio_d1; struct s5pc210_gpio_bank gpio_e0; struct s5pc210_gpio_bank gpio_e1; struct s5pc210_gpio_bank gpio_f0; struct s5pc210_gpio_bank gpio_f1; struct s5pc210_gpio_bank gpio_f2; struct s5pc210_gpio_bank gpio_f3; struct s5pc210_gpio_bank gpio_g0; struct s5pc210_gpio_bank gpio_g1; struct s5pc210_gpio_bank gpio_g2; struct s5pc210_gpio_bank gpio_g3; struct s5pc210_gpio_bank gpio_i; struct s5pc210_gpio_bank gpio_j0; struct s5pc210_gpio_bank gpio_j1; struct s5pc210_gpio_bank gpio_j2; struct s5pc210_gpio_bank gpio_j3; struct s5pc210_gpio_bank gpio_j4; }; struct s5pc210_uart_bank { unsigned int ulcon; unsigned int ucon; unsigned int ufcon; unsigned int umcon; unsigned int utrstat; unsigned int uerstat; unsigned int ufstat; unsigned int umstat; unsigned int utxh; unsigned int urxh; unsigned int ubrdiv; unsigned int udivslot; unsigned int uintp; unsigned int uintsp; unsigned int uimtm; unsigned char res1[4]; unsigned char res2[0x3c0] }; struct s5pc210_uart { struct s5pc210_uart_bank UART1; struct s5pc210_uart_bank UART2; struct s5pc210_uart_bank UART3; }; #endif

//UART.H

#ifndef _UART_LCQ_H #define _UART_LCQ_H void uart2_init(void); void uart2_sendchar(char c); void uart2_sendstr(const char *str); void uart1_init(void); void uart1_sendchar(char c); void uart1_sendstr(const char *str); #endif

//uart.c 波特率都是115200

#include "uart.h" #include "cpu_io.h" #include "gpio.h" void uart1_init(void) { struct s5pc210_uart *uart_base = (struct s5pc210_uart *)S5PV210_UARTBASE; struct s5pv210_gpio *gpio_base = (struct s5pv210_gpio *)S5PV210_GPIOBASE; unsigned int var; //引脚配置 var = readl(&gpio_base->gpio_a0.con); var &= ~0xff; var |= 0x22; writel(var, &gpio_base->gpio_a0.con); //uart 参数配置 _REG(&uart_base->UART1.ulcon) = 0x3; /*8位1位停止位*/ _REG(&uart_base->UART1.ucon) = 0x5;/*使能发送接收*/ _REG(&uart_base->UART1.ubrdiv) = 35; _REG(&uart_base->UART1.udivslot) = 0x80; } void uart1_sendchar(char c) { struct s5pc210_uart *uart_base = (struct s5pc210_uart *)S5PV210_UARTBASE; //等待上次发送完成 while(!(_REG(&uart_base->UART1.utrstat)&(0x1<<2))); //发送 _REG(&uart_base->UART1.utxh) =c; } void uart1_sendstr(const char *str) { while(*str) { uart1_sendchar(*str); str++; } } char uart1_getchar(void) { struct s5pc210_uart *uart_base = (struct s5pc210_uart *)S5PV210_UARTBASE; //等待上次发送完成 while(!(_REG(&uart_base->UART1.utrstat)&(0x1<<0))); //发送 return _REG(&uart_base->UART1.utxh); } void uart2_init(void) { struct s5pc210_uart *uart_base = (struct s5pc210_uart *)S5PV210_UARTBASE; struct s5pv210_gpio *gpio_base = (struct s5pv210_gpio *)S5PV210_GPIOBASE; unsigned int var; //引脚配置 var = readl(&gpio_base->gpio_a0.con); var &= ~0xff<<16; var |= 0x22<<16; writel(var, &gpio_base->gpio_a0.con); //uart 参数配置 _REG(&uart_base->UART2.ulcon) = 0x3; /*8位1位停止位*/ _REG(&uart_base->UART2.ucon) = 0x5;/*使能发送接收*/ _REG(&uart_base->UART2.ubrdiv) = 35; /* 这两位设置波特率 */ _REG(&uart_base->UART2.udivslot) = 0x80; } void uart2_sendchar(char c) { struct s5pc210_uart *uart_base = (struct s5pc210_uart *)S5PV210_UARTBASE; //等待上次发送完成 while(!(_REG(&uart_base->UART2.utrstat)&(0x1<<2))); //发送 _REG(&uart_base->UART2.utxh) =c; } void uart2_sendstr(const char *str) { while(*str) { uart2_sendchar(*str); str++; } } char uart2_getchar(void) { struct s5pc210_uart *uart_base = (struct s5pc210_uart *)S5PV210_UARTBASE; //等待上次发送完成 while(!(_REG(&uart_base->UART1.utrstat)&(0x1<<0))); //发送 return _REG(&uart_base->UART1.utxh); }