ch579串口编程笔记

"CH579SFR.h"库文件，关于串口中断部分

/* UART interrupt identification values for IIR bits 3:0 */

#define UART_II_SLV_ADDR 0x0E // RO, UART0 slave address match

#define UART_II_LINE_STAT 0x06 // Re staO, UART interrupt by receiver lintus

#define UART_II_RECV_RDY 0x04 // RO, UART interrupt by receiver data available

#define UART_II_RECV_TOUT 0x0C // RO, UART interrupt by receiver fifo timeout

#define UART_II_THR_EMPTY 0x02 // RO, UART interrupt by THR empty

#define UART_II_MODEM_CHG 0x00 // RO, UART0 interrupt by modem status change

#define UART_II_NO_INTER 0x01 // RO, no UART interrupt is pending

名称	说明	解释
UART_II_SLV_ADDR 0x0E	RO, UART0 slave address match	只读，串口0从机地址匹配
UART_II_LINE_STAT 0x06	Re staO, UART interrupt by receiver lintus	只读，串口
UART_II_RECV_RDY 0x04	RO, UART interrupt by receiver data available	只读，
UART_II_RECV_TOUT 0x0C	RO, UART interrupt by receiver fifo timeout	只读，
UART_II_THR_EMPTY 0x02	RO, UART interrupt by THR empty	只读，
UART_II_MODEM_CHG 0x00	RO, UART0 interrupt by modem status change	只读，
UART_II_NO_INTER 0x01	RO, no UART interrupt is pending	只读，
[参数解释]

接收长字符串

CH57x_uart.h中修改提供代码如下

红圈部分根据芯片说明书修改为如下

typedef enum
{
    UART_1BYTE_TRIG = 0,        // 1×Ö½Ú´¥·¢
    UART_2BYTE_TRIG = 1,            // 2×Ö½Ú´¥·¢
    UART_4BYTE_TRIG = 2,            // 4×Ö½Ú´¥·¢
    UART_7BYTE_TRIG = 3,            // 7×Ö½Ú´¥·¢
    
}UARTByteTRIGTypeDef;   

初始化UART1

文件CH57x_uart.c中修改为1字节触发。

测试结果