230 lines
6.1 KiB
C
230 lines
6.1 KiB
C
#include "uart.h"
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uint8 busy[5]; //接收忙标志位
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//-------------------------------------------------------------------------------------------------------------------
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// @brief 串口初始化
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// @param uart_n 串口模块号(USART_1,USART_2,USART_3,USART_4)
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// @param uart_rx_pin 串口接收引脚
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// @param uart_tx_pin 串口发送引脚
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// @param baud 串口波特率
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// @param tim_n 使用tim_n作为串口波特率发生器(TIM1-TIM4)
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// @return NULL
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// Sample usage: uart_init(UART_1, UART1_RX_P30, UART1_TX_P31, 115200, TIM_2); //初始化串口1 波特率115200 发送引脚使用P31 接收引脚使用P30 ,使用定时器2作为波特率发生器
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// @note 串口1使用 定时器1或者定时器2 作为波特率发生器。
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// 串口2使用 定时器2 作为波特率发生器。
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// 串口3使用 定时器3或者定时器2 作为波特率发生器。
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// 串口4使用 定时器4或者定时器2 作为波特率发生器。
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// STC32G仅有 定时器0-定时器4，这5个定时器。
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// 编码器采集数据也需要定时器作为外部计数。
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// 如果不同的串口，使用同一个定时器，串口的波特率以最后一个初始化为准
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//-------------------------------------------------------------------------------------------------------------------
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void uart_init(UARTN_enum uart_n, UARTPIN_enum uart_rx_pin, UARTPIN_enum uart_tx_pin, uint32 baud, TIMN_enum tim_n)
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{
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uint16 brt;
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brt = (uint16)(65536 - (sys_clk/baud/4));
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switch(uart_n)
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{
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case UART_1:
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{
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if(TIM_1 == tim_n)
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{
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SCON |= 0x50;
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TMOD |= 0x00;
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TL1 = brt;
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TH1 = brt >> 8;
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AUXR |= 0x40;
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TR1 = 1;
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busy[1] = 0;
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}
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else if(TIM_2 == tim_n)
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{
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SCON |= 0x50;
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T2L = brt;
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T2H = brt >> 8;
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AUXR |= 0x15;
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}
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P_SW1 &= ~(0x03<<6);
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if((UART1_RX_P30 == uart_rx_pin) && (UART1_TX_P31 == uart_tx_pin))
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{
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P_SW1 |= 0x00;
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}
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else if((UART1_RX_P36 == uart_rx_pin) && (UART1_TX_P37 == uart_tx_pin))
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{
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P_SW1 |= 0x40;
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}
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else if((UART1_RX_P16 == uart_rx_pin) && (UART1_TX_P17 == uart_tx_pin))
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{
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P_SW1 |= 0x80;
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}
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else if((UART1_RX_P43 == uart_rx_pin) && (UART1_TX_P44 == uart_tx_pin))
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{
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P_SW1 |= 0xc0;
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}
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busy[1] = 0;
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ES = 1;
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break;
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}
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case UART_2:
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{
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if(TIM_2 == tim_n)
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{
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S2CON |= 0x50;
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T2L = brt;
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T2H = brt >> 8;
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AUXR |= 0x14;
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}
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P_SW2 &= ~(0x01<<0);
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if((UART2_RX_P10 == uart_rx_pin) && (UART2_TX_P11 == uart_tx_pin))
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{
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P_SW2 |= 0x00;
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}
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else if((UART2_RX_P46 == uart_rx_pin) && (UART2_TX_P47 == uart_tx_pin))
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{
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P_SW2 |= 0x01;
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}
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IE2 |= 0x01 << 0; //允许串行口2中断
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busy[2] = 0;
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break;
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}
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case UART_3:
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{
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if(TIM_2 == tim_n)
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{
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S3CON |= 0x10;
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T2L = brt;
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T2H = brt >> 8;
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AUXR |= 0x14;
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}
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else if(TIM_3 == tim_n)
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{
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S3CON |= 0x50;
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T3L = brt;
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T3H = brt >> 8;
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T4T3M |= 0x0a;
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}
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P_SW2 &= ~(0x01<<1);
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if((UART3_RX_P00 == uart_rx_pin) && (UART3_TX_P01 == uart_tx_pin))
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{
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P_SW2 |= 0x00;
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}
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else if((UART3_RX_P50 == uart_rx_pin) && (UART3_TX_P51 == uart_tx_pin))
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{
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P_SW2 |= 0x02;
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}
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IE2 |= 0x01<<3; //允许串行口3中断
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busy[3] = 0;
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break;
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}
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case UART_4:
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{
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if(TIM_2 == tim_n)
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{
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S4CON |= 0x10;
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T2L = brt;
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T2H = brt >> 8;
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AUXR |= 0x14;
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}
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else if(TIM_4 == tim_n)
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{
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S4CON |= 0x50;
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T4L = brt;
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T4H = brt >> 8;
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T4T3M |= 0xa0;
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}
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P_SW2 &= ~(0x01<<2);
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if((UART4_RX_P02 == uart_rx_pin) && (UART4_TX_P03 == uart_tx_pin))
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{
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P_SW2 |= 0x00;
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}
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else if((UART4_RX_P52 == uart_rx_pin) && (UART4_TX_P53 == uart_tx_pin))
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{
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P5M0 = 0x00;
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P5M1 = 0x01<<2;//P5.2 需要设置为高阻
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P_SW2 |= 0x04;
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}
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IE2 |= 0x01<<4; //允许串行口4中断
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busy[4] = 0;
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break;
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}
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}
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}
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//-------------------------------------------------------------------------------------------------------------------
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// @brief 串口字节输出
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// @param uart_n 串口模块号(USART_1,USART_2,USART_3,USART_4)
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// @param dat 需要发送的字节
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// @return void
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// Sample usage: uart_putchar(UART_1,0xA5); // 串口1发送0xA5
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//-------------------------------------------------------------------------------------------------------------------
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void uart_putchar(UARTN_enum uart_n,uint8 dat)
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{
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switch(uart_n)
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{
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case UART_1:
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while (busy[1]);
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busy[1] = 1;
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SBUF = dat;
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break;
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case UART_2:
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while (busy[2]);
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busy[2] = 1;
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S2BUF = dat;
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break;
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case UART_3:
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while (busy[3]);
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busy[3] = 1;
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S3BUF = dat;
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break;
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case UART_4:
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while (busy[4]);
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busy[4] = 1;
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S4BUF = dat;
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break;
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}
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}
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//-------------------------------------------------------------------------------------------------------------------
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// @brief 串口发送数组
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// @param uart_n 串口模块号(USART_1,USART_2,USART_3,USART_4)
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// @param *buff 要发送的数组地址
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// @param len 发送长度
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// @return void
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// Sample usage: uart_putbuff(UART_1,&a[0],5);
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//-------------------------------------------------------------------------------------------------------------------
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void uart_putbuff(UARTN_enum uart_n,uint8 *p,uint32 len)
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{
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while(len--)
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uart_putchar(uart_n,*p++);
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}
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//-------------------------------------------------------------------------------------------------------------------
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// @brief 串口发送字符串
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// @param uart_n 串口模块号(USART_1,USART_2,USART_3,USART_4)
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// @param *str 要发送的字符串地址
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// @return void
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// Sample usage: uart_putstr(UART_1,"i lvoe you");
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//-------------------------------------------------------------------------------------------------------------------
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void uart_putstr(UARTN_enum uart_n,uint8 *str)
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{
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while(*str)
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{
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uart_putchar(uart_n, *str++);
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}
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}
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