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

参数解释

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，

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