145 lines
4.8 KiB
C
145 lines
4.8 KiB
C
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/*----------------------------------------------------------------------------------------------------
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INCLUDE HEADE FILES
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----------------------------------------------------------------------------------------------------*/
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#include "Includes.h"
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/* ---------------------------------------------------------------------------------------------------
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- 函数名称: Init_uart
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- 函数功能: UART初始化
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- 输入参数: 初始化串口号(0:uart0 1:uart1); 波特率
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- 创建日期: 2016-05-26
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----------------------------------------------------------------------------------------------------*/
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extern void Init_uart(uint32_t ch , uint32_t baud)
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{
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uint32_t val;
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__write_hw_reg32(CPR_RSTCTL_SUBRST_SW , (1<<(16+ch))); //复位uart模块
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__write_hw_reg32(CPR_RSTCTL_SUBRST_SW , ((1<<(16+ch))|(1<<ch)));//解复位uart模块
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__read_hw_reg32(CPR_LP_CTL , val);
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val &= ~(1<<(1-ch));
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__write_hw_reg32(CPR_LP_CTL , val); //关闭uartx时钟保护
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val = (1<<(16+ch+4)) | (1<<(ch+4));
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__write_hw_reg32(CPR_CTLAPBCLKEN_GRCTL , val); //打开uartx pclk
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__write_hw_reg32(CPR_UARTx_CLK_GRCTL(ch), 0x110018);
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//__write_hw_reg32(CPR_UARTx_CLK_CTL(ch), 0x480271);
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__write_hw_reg32(CPR_UARTx_CLK_CTL(ch), baud>>4);
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__write_hw_reg32(UARTx_TCR(ch) , 0x80); //使能DLAB位
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//__write_hw_reg32(UARTx_DLL(ch) , baud);
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__write_hw_reg32(UARTx_DLL(ch) , baud&0x0F);
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__write_hw_reg32(UARTx_DLH(ch) , 0);
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__write_hw_reg32(UARTx_TCR(ch) , 0x03); //清零DLAB位,8个BIT位
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__write_hw_reg32(UARTx_FCR(ch) , 0xb7); //接收FIFO半满报中断, 并使能FIFO中断
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__write_hw_reg32(UARTx_IER(ch) , 0x01); //打开接收中断
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val = UART0_IRQn + ch;
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NVIC_EnableIRQ((IRQn_Type)val);
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}
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/* ---------------------------------------------------------------------------------------------------
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- 函数名称: UART0_Handler
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- 函数功能: UART0中断处理函数
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- 输入参数: 无
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- 创建日期: 2016-05-26
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----------------------------------------------------------------------------------------------------*/
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extern void UART0_Handler(void)
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{
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uint32_t iWK = 0 ;
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uint8_t tWK = 0 ;
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__read_hw_reg32(UART0_IIR , iWK);
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iWK &= 0x0F;
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if((iWK != 0x04) && (iWK != 0x0c)) return;
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__read_hw_reg32(UART0_RBR , tWK);
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}
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/* ---------------------------------------------------------------------------------------------------
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- 函数名称: UART1_Handler
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- 函数功能: UART1中断处理函数
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- 输入参数: 无
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- 创建日期: 2016-05-26
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----------------------------------------------------------------------------------------------------*/
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extern void UART1_Handler(void)
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{
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uint32_t iWK = 0 ;
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uint8_t tWK = 0 ;
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__read_hw_reg32(UART1_IIR , iWK);
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iWK &= 0x0F;
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if((iWK != 0x04) && (iWK != 0x0c)) return;
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__read_hw_reg32(UART1_RBR , tWK);
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#if 1
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Uart_Send_Char(1,'R');
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Uart_Send_Char(1,'e');
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Uart_Send_Char(1,'v');
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Uart_Send_Char(1,':');
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Uart_Send_Char(1,tWK);
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Uart_Send_Char(1,'\n');
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#endif
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}
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/* ---------------------------------------------------------------------------------------------------
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- 函数名称: Uart_Send_Char
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- 函数功能: Uart发送一个字符
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- 输入参数: 串口号; 要发送的字符
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- 创建日期: 2016-05-26
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----------------------------------------------------------------------------------------------------*/
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extern void Uart_Send_Char(uint32_t ch, uint8_t c)
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{
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unsigned int status;
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for(; ;)
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{
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__read_hw_reg32(UARTx_TSR(ch), status);
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status &= 0x20;
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if(status == 0x20) break;
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}
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__write_hw_reg32(UARTx_THR(ch), c);
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}
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/* ---------------------------------------------------------------------------------------------------
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- 函数名称: Uart_Send_String
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- 函数功能: Uart发送一个字符串
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- 输入参数: 串口号; 要发送的字符串
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- 创建日期: 2016-05-26
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----------------------------------------------------------------------------------------------------*/
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extern void Uart_Send_String(uint32_t ch, uint8_t *s)
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{
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while(*s != '\0')
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{
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Uart_Send_Char(ch, *s++);
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}
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}
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/* ---------------------------------------------------------------------------------------------------
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- 函数名称: Uart_Send_Buf
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- 函数功能: Uart发送一个长度为length的uint8_t类型的数组
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- 输入参数: 串口号; 要发送的数组，数组长度
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- 创建日期: 2019-04-02
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- 作 者：陈俊伟
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----------------------------------------------------------------------------------------------------*/
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extern void Uart_Send_Buf(uint32_t ch, uint8_t *s,uint32_t length)
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{
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while(length--)
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{
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Uart_Send_Char(ch, *s++);
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}
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}
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extern void test_uart(void)
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{
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gpio_mux_ctl(0,0);gpio_fun_inter(0,0);gpio_fun_sel(0,UART1_RX);
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gpio_mux_ctl(1,0);gpio_fun_inter(1,0);gpio_fun_sel(1,UART1_TX);
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Init_uart(1, BAUD_57600);
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Uart_Send_String(1,"I am uart1...\n");
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}
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