UART操作的程序

1、uart 操作的程序佚名/ 2008-09-18 t3c25-v5 僅售 880元uart 操作的程序作者：轉(zhuǎn)載#include config.h /*define uarts data structure*/ typedef struct uartmode uint8 datab; / byte length uint8 stopb; / stop bit,1/2 uint8 parity; / parity bit setting uartmode; uint8 rcv_buf8; uint8 rcv_byte8; volatile uint8 add_data_num; volatile

2、 uint8 rcv_new; /flag for rcving new data volatile uint8 add_data; void _irq irq_uart0(void) uint8 i; if (u0iir & 0 x0f) = 0 x04) rcv_new = 1; for (i = 0; i8; i+) rcv_bufi = u0rbr; / read all the data in fifo once. then there is no too much interruptions if (u0iir & 0 xf) = 0 x0c) add_data_n

3、um = 0; while (u0lsr & 0 x00000001)/ read uarts lsr register first, / and determine whether fifo is empty add_data = 1; / or not. rcv_byteadd_data_num = u0rbr; add_data_num+; vicvectaddr = 0 x00; void uart0_sendbyte(uint8 dat) u0thr = dat; void uart0_sendbuf(void) uint8 i; for (i=0; i8; i+) uart

4、0_sendbyte(rcv_bufi); while (u0lsr & 0 x20) = 0) ; void uart0_sendaddbyte(uint8 j) uint8 i; for (i = 0; i 115200) return (0); if (set.datab 8) return (0); if (set.stopb = 0)|(set.stopb 2) return (0); if (set.parity 4) return (0); /*set uarts baud rate*/ u0lcr = 0 x80; /dlab = 1 bak = (fpclk 4)/b

5、aud; u0dlm = bak 8; u0dll = bak &0 xff; /*set uarts mode*/ bak = set.datab - 5; if (set.stopb = 2) bak |= 0 x04; if (set.parity != 0) set.parity = set.parity - 1; bak |= 0 x08; bak |= set.parity 4; u0lcr = bak; return (1); int main (void) / add user source code uartmode set; set.datab = 8; set.s

6、topb = 1; set.parity = 0; rcv_new = 0; pinsel0 = (pinsel0 & 0 xfffffff0) | 0 x5; uart0_init(115200, set); u0fcr = 0 x81; u0ier = 0 x01; irqenable(); /*enable uart0 interruption*/ vicintselect = 0 x00000000; vicvectcntl0 = 0 x20|0 x06; vicvectaddr0 = (uint32)irq_uart0; vicintenable = 10 x06; /enable uart0s interruption while (1) if (rcv_new = 1) rcv_new