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Add FreeRTOS-Plus directory.
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Richard Barry
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6798 changed files with 134949 additions and 19 deletions
367
FreeRTOS/Demo/ARM7_STR71x_IAR/Library/uart.c
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367
FreeRTOS/Demo/ARM7_STR71x_IAR/Library/uart.c
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/******************** (C) COPYRIGHT 2003 STMicroelectronics ********************
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* File Name : uart.c
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* Author : MCD Application Team
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* Date First Issued : 06/08/2003
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* Description : This file provides all the UART software functions
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********************************************************************************
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* History:
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* 30/11/2004 : V2.0
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* 14/07/2004 : V1.3
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* 01/01/2004 : V1.2
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*******************************************************************************
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THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS WITH
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CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
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AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, INDIRECT
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OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE CONTENT
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OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING INFORMATION
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CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*******************************************************************************/
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#include "uart.h"
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extern u16 UART_FlagStatus(UART_TypeDef *UARTx);
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/*******************************************************************************
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* Function Name : UART_Init
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* Description : This function initializes the selected UART.
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* Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Output : None
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* Return : None
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*******************************************************************************/
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void UART_Init(UART_TypeDef *UARTx)
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{
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UARTx->IER = 0x00;
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UARTx->CR = 0x00;
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(void)UARTx->RxBUFR;
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UARTx->RxRSTR = 0xFFFF;
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UARTx->TxRSTR = 0xFFFF;
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}
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/*******************************************************************************
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* Function Name : UART_BaudRateConfig
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* Description : This function configures the baud rate of the selected UART.
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* Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2 : The baudrate value
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* Output : None
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* Return : None
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*******************************************************************************/
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void UART_BaudRateConfig(UART_TypeDef *UARTx, u32 BaudRate)
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{
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UARTx->BR = (u16)(RCCU_FrequencyValue(RCCU_FCLK)/(16*BaudRate));
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}
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/*******************************************************************************
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* Function Name : UART_Config
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* Description : This function configures the baudrate, the mode, the data
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* parity and the number of stop bits of the selected UART.
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* Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2 : The baudrate value
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* Input 3 : The parity type
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* Input 4 : The number of stop bits
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* Input 5 : The UART mode
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* Output : None
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* Return : None
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*******************************************************************************/
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void UART_Config(UART_TypeDef *UARTx, u32 BaudRate, UARTParity_TypeDef Parity,
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UARTStopBits_TypeDef StopBits, UARTMode_TypeDef Mode)
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{
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UART_ModeConfig(UARTx, Mode);
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UART_BaudRateConfig(UARTx, BaudRate);
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UART_ParityConfig(UARTx, Parity);
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UART_StopBitsConfig(UARTx, StopBits);
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}
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/*******************************************************************************
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* Function Name : UART_ItConfig
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* Description : This function enables or disables the interrupts of the
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* selected UART.
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* Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2 : The new interrupt flag
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* Input 3 : ENABLE or DISABLE
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* Output : None
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* Return : None
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*******************************************************************************/
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void UART_ItConfig(UART_TypeDef *UARTx, u16 UART_Flag, FunctionalState NewState)
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{
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if (NewState==ENABLE) UARTx->IER|=UART_Flag; else UARTx->IER&=~UART_Flag;
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}
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/*******************************************************************************
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* Function Name : UART_FifoConfig
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* Description : This function enables or disables the Rx and Tx FIFOs of
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* the selected UART.
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* Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2 : ENABLE or DISABLE
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* Output : None
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* Return : None
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*******************************************************************************/
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void UART_FifoConfig(UART_TypeDef *UARTx, FunctionalState NewState)
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{
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if (NewState==ENABLE) UARTx->CR|=0x0400; else UARTx->CR&=~0x0400;
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}
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/*******************************************************************************
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* Function Name : UART_FifoReset
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* Description : This function resets the Rx and the Tx FIFOs of the
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* selected UART.
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* Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2 : UART_RxFIFO or UART_TxFIFO
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* Output : None
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* Return : None
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*******************************************************************************/
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void UART_FifoReset(UART_TypeDef *UARTx, UARTFIFO_TypeDef FIFO)
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{
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if (FIFO==UART_RxFIFO) UARTx->RxRSTR=0xFFFF; else UARTx->TxRSTR=0xFFFF;
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}
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/*******************************************************************************
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* Function Name : UART_LoopBackConfig
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* Description : This function enables or disables the loop back mode of
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* the selected UART.
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* Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2 : ENABLE or DISABLE
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* Output : None
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* Return : None
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*******************************************************************************/
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void UART_LoopBackConfig(UART_TypeDef *UARTx, FunctionalState NewState)
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{
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if (NewState==ENABLE) UARTx->CR|=0x0040; else UARTx->CR&=~0x0040;
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}
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/*******************************************************************************
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* Function Name : UART_RxConfig
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* Description : This function enables or disables the UART data reception.
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* Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2 : ENABLE or DISABLE
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* Output : None
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* Return : None
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*******************************************************************************/
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void UART_RxConfig(UART_TypeDef *UARTx, FunctionalState NewState)
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{
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if (NewState==ENABLE) UARTx->CR|=0x0100; else UARTx->CR&=~0x0100;
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}
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/*******************************************************************************
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* Function Name : UART_OnOffConfig
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* Description : This function sets On/Off the selected UART.
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* Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2 : ENABLE or DISABLE
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* Output : None
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* Return : None
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*******************************************************************************/
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void UART_OnOffConfig(UART_TypeDef *UARTx, FunctionalState NewState)
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{
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if (NewState==ENABLE) UARTx->CR|=0x0080; else UARTx->CR&=~0x0080;
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}
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/*******************************************************************************
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* Function Name : UART_ByteSend
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* Description : This function sends a data byte to the selected UART.
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* Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2 : A pointer to the data byte to send
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* Output : None
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* Return : None
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*******************************************************************************/
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void UART_ByteSend(UART_TypeDef *UARTx, u8 *Data)
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{
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if (UARTx->CR & (0x0001<<UART_FIFOEnableBit))// if FIFO ENABLED
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while((UARTx->SR & UART_TxFull)); // while the UART_TxFIFO contain 16 characters.
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else // if FIFO DISABLED
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while (!(UARTx->SR & UART_TxEmpty)); // while the transmit shift register not empty
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UARTx->TxBUFR = *Data;
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}
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/*******************************************************************************
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* Function Name : UART_9BitByteSend
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* Description : This function sends a 9 bits data byte to the selected UART.
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* Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2 : A pointer to the data to send
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* Output : None
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* Return : None
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*******************************************************************************/
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void UART_9BitByteSend(UART_TypeDef *UARTx, u16 *Data)
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{
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if(UARTx->CR & (0x0001<<UART_FIFOEnableBit))// if FIFO ENABLED
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while((UARTx->SR & UART_TxFull)); // while the UART_TxFIFO contain 16 characters.
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else // if FIFO DISABLED
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while (!(UARTx->SR & UART_TxEmpty)); // while the transmit shift register not empty
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UARTx->TxBUFR = *Data;
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}
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/*******************************************************************************
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* Function Name : UART_DataSend
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* Description : This function sends several data bytes to the selected UART.
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* Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2 : A pointer to the data to send
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* Input 3 : The data length in bytes
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* Output : None
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* Return : None
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*******************************************************************************/
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void UART_DataSend(UART_TypeDef *UARTx, u8 *Data, u8 DataLength)
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{
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while(DataLength--)
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{
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UART_ByteSend(UARTx,Data);
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Data++;
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}
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}
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/*******************************************************************************
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* Function Name : UART_9BitDataSend
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* Description : This function sends several 9 bits data bytes to the selected UART.
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* Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2 : A pointer to the data to send
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* Input 3 : The data length
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* Output : None
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* Return : None
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*******************************************************************************/
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void UART_9BitDataSend(UART_TypeDef *UARTx, u16 *Data, u8 DataLength)
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{
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while(DataLength--)
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{
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UART_9BitByteSend(UARTx,Data);
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Data++;
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}
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}
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/*******************************************************************************
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* Function Name : UART_StringSend
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* Description : This function sends a string to the selected UART.
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* Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2 : A pointer to the string to send
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* Output : None
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* Return : None
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*******************************************************************************/
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void UART_StringSend(UART_TypeDef *UARTx, u8 *String)
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{
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u8 *Data=String;
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while(*Data != '\0')
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UART_ByteSend(UARTx, Data++);
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*Data='\0';
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UART_ByteSend(UARTx, Data);
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}
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/*******************************************************************************
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* Function Name : UART_ByteReceive
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* Description : This function gets a data byte from the selected UART.
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* Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2 : A pointer to the buffer where the data will be stored
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* Input 3 : The time-out period
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* Output : The received data
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* Return : The UARTx.SR register contents
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*******************************************************************************/
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u16 UART_ByteReceive(UART_TypeDef *UARTx, u8 *Data, u8 TimeOut)
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{
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u16 wStatus;
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UARTx->TOR=TimeOut;// reload the Timeout counter
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while (!((wStatus=UARTx->SR) & (UART_TimeOutIdle|UART_RxHalfFull|UART_RxBufFull)));// while the UART_RxFIFO is empty and no Timeoutidle
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*Data = (u8)UARTx->RxBUFR; // then read the Receive Buffer Register
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return wStatus;
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}
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/*******************************************************************************
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* Function Name : UART_9BitByteReceive
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* Description : This function gets a 9 bits data byte from the selected UART.
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* Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2 : A pointer to the buffer where the data will be stored
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* Input 3 : The time-out period value
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* Output : The received data
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* Return : The UARTx.SR register contents
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*******************************************************************************/
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u16 UART_9BitByteReceive(UART_TypeDef *UARTx, u16 *Data, u8 TimeOut)
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{
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u16 wStatus;
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UARTx->TOR=TimeOut;// reload the Timeout counter
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while (!((wStatus=UARTx->SR) & (UART_TimeOutIdle|UART_RxHalfFull|UART_RxBufFull)));// while the UART_RxFIFO is empty and no Timeoutidle
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*Data = (u16)UARTx->RxBUFR; // then read the RxBUFR
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return wStatus;
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}
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/*******************************************************************************
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* Function Name : UART_DataReceive
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* Description : This function gets 8 bits data bytes from the selected UART.
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* Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2 : A pointer to the buffer where the data will be stored
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* Input 3 : The data length
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* Input 4 : The time-out period value
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* Output : The received data
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* Return : The UARTx.SR register contents
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*******************************************************************************/
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u16 UART_DataReceive(UART_TypeDef *UARTx, u8 *Data, u8 DataLength, u8 TimeOut)
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{
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u16 wStatus;
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while(DataLength--)
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wStatus=UART_ByteReceive(UARTx,Data++,TimeOut);
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return wStatus;
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}
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/*******************************************************************************
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* Function Name : UART_9BitDataReceive
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* Description : This function gets 9 bits data bytes from the selected UART.
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* Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2 : A pointer to the buffer where the data will be stored
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* Input 3 : The data length
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* Input 4 : The time-out value
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* Output : The received data
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* Return : The UARTx.SR register contents
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*******************************************************************************/
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u16 UART_9BitDataReceive(UART_TypeDef *UARTx, u16 *Data, u8 DataLength, u8 TimeOut)
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{
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u16 wStatus;
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while(DataLength--)
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wStatus=UART_9BitByteReceive(UARTx,Data++,TimeOut);
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return wStatus;
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}
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/*******************************************************************************
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* Function Name : UART_StringReceive
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* Description : This function gets 8 bits data bytes from the selected UART.
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* Input 1 : UARTx (x can be 0,1, 2 or 3) the desired UART
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* Input 2 : A pointer to the buffer where the string will be stored
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* Output : The received string
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* Return : The UARTx.SR register contents
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*******************************************************************************/
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u16 UART_StringReceive(UART_TypeDef *UARTx, u8 *Data)
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{
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u8 *pSTRING=Data;
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u16 wStatus;
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do
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{
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while (!((wStatus=UARTx->SR) & (UART_RxHalfFull|UART_RxBufFull)));// while the UART_RxFIFO is empty and no Timeoutidle
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*(pSTRING++) = (u8)UARTx->RxBUFR; // then read the RxBUFR
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} while((*(pSTRING - 1)!=0x0D)&(*(pSTRING - 1)!='\0'));
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*(pSTRING - 1)='\0';
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return wStatus;
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}
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#ifdef USE_SERIAL_PORT
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/*******************************************************************************
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* Function Name : sendchar
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* Description : This function sends a character to the selected UART.
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* Input 1 : A pointer to the character to send.
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* Output : None
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* Return : None
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*******************************************************************************/
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void sendchar( char *ch )
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{
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#ifdef USE_UART0
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#define UARTx UART0
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#endif /* Use_UART0 */
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#ifdef USE_UART1
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#define UARTx UART1
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#endif /* Use_UART1 */
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#ifdef USE_UART2
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#define UARTx UART2
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#endif /* Use_UART2 */
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#ifdef USE_UART3
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#define UARTx UART3
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#endif /* Use_UART3 */
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UART_ByteSend(UARTx,(u8 *)ch);
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}
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#endif /* USE_SERIAL_PORT */
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/******************* (C) COPYRIGHT 2003 STMicroelectronics *****END OF FILE****/
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