uart.rar_RTEMS_rtems uart

/* * Uart driver source -- simplified version of uart1 driver. * * $Id: uart.h, 2013/09/09 Shuai,bai designed by. * * Notice:if any body want to use this,please contanct me:QQ,287996432. */ #include "configure.h" #define TX_READY (1<<2) //send data ok #define RX_READY (1) //recieve data ok static char *driver_name = "/dev/uart1"; static char device_count = 0; /** declare functions ***/ rtems_device_driver uart1_initialize(major_t,minor_t,void*); rtems_device_driver uart1_open(major_t,minor_t,void*); rtems_device_driver uart1_close(major_t,minor_t,void*); rtems_device_driver uart1_read(major_t,minor_t,void*); rtems_device_driver uart1_write(major_t,minor_t,void*); rtems_device_driver uart1_ioctl(major_t,minor_t,void*); /** * entry table **/ rtems_driver_address_table uart1_table = { uart1_initialize, uart1_open, uart1_close, uart1_read, uart1_write, uart1_ioctl }; /** * function: void uart_init() * decription: init uart **/ void uart_init() { GPHCON |= 0xa00; //gph4,gph5-->01,rx1,tx1 GPHUP = 0x0; //gph4,gph5-->up ULCON1 = 0x03; //8n1 UCON1 = 0x05; //pclk,lun xun,interrupt UFCON1 = 0x0; // no FIFO UMCON1 = 0x00; //no AFC UBRDIV1 = 26; //115200hz } /** * function : void sendc(char) * description: tx a char **/ void sendc(uchar c) { while(!(UTRSTAT1 & TX_READY)); UTXH1 = c; } /** * funciton: uchar getc(void) * description: rx a char **/ uchar getc(void) { while(!(UTRSTAT1 & RX_READY)); return URXH1; } /** * function: void sends(char *); * description: send a string **/ void sends(uchar *s) { while(*s) { sendc(*s++); } } /** * function: char* gets(uchar *s) * description: get a string **/ uchar* gets(uchar *s) { int len = 0; uchar c; for(;; len++) { c = getc(); s[len] = c; if(0 ==c) { s[len] = '\0'; break; } } return s; } /** * function:uart1_initialize() * description:init the uart1 */ rtems_device_driver uart1_initialize( rtems_device_major_number major, rtems_device_minor_number minor, void *arg ) { rtems_status_code status; //init uart uart_init(); //registe device name status = rtems_io_register_name(driver_name,major,minor); if(RTEMS_SUCCESSFUL != status) { printk("[Driver],regist name error!,Too many device!\n"); return status; } printk("[Driver]: initialize uart1 ok!\n"); return RTEMS_SUCCESSFUL; } /** * function:uart1_open() * description:open the uart1 */ rtems_device_driver uart1_open( rtems_device_major_number major, rtems_device_minor_number minor, void *argument ) { rtems_status_code status = RTEMS_SUCCESSFUL; if(device_count > 0) { return RTEMS_RESOURCE_IN_USE; } device_count++; printk("[Driver]: open uart1 ok!\n"); return status; } /** * function: uart1_close() * description:close the uart1 */ rtems_device_driver uart1_close( rtems_device_major_number major, rtems_device_minor_number minor, void *argument ) { rtems_status_code status = RTEMS_SUCCESSFUL; if(RTEMS_SUCCESSFUL != rtems_io_unregister_driver(major)) { printk("[Driver]:unregister uart1 failed!\n"); } device_count--; printk("[Driver]: close uart1 ok!\n"); return status; } /** * function: uart1_write() * description: write the uart1 */ rtems_device_driver uart1_write( rtems_device_major_number major, rtems_device_minor_number minor, void *u_buff ) { sends((uchar *)u_buff); printk("[Driver]: write uart1 ok!user buff is:%s!\n",(char *)u_buff); return RTEMS_SUCCESSFUL; } /** * function:uart1_read() * description:read the uart1 */ rtems_device_driver uart1_read( rtems_device_major_number major, rtems_device_minor_number minor, void *u_buff ) { printk("[Driver]: read uart1 ok!\n"); uchar *s = NULL; s = gets(s); strcpy((char*)u_buff,(char*)s); return RTEMS_SUCCESSFUL; } /** * function:uart1_ioctl() * description:ioctl the uart1 */ rtems_device_driver uart1_ioctl( rtems_device_major_number major, rtems_device_minor_number minor, void *cmd ) { rtems_status_code status = RTEMS_SUCCESSFUL; int *d_cmd = cmd; printk("[Driver]: ioctl uart1 ok!current cmd is %d!\n",*d_cmd); return status; } /* * end of the uart1 */