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Matthias
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/******************************************************************************
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*
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* $RCSfile: $
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* $Revision: $
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*
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* This module provides the interface definitions for for uart.c
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* Copyright 2004, R O SoftWare
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* No guarantees, warrantees, or promises, implied or otherwise.
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* May be used for hobby or commercial purposes provided copyright
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* notice remains intact.
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*
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*****************************************************************************/
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#ifndef INC_UART_H
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#define INC_UART_H
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#include "sys_config.h"
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#include "app_types.h"
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#include "LPC_REGS.h"
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///////////////////////////////////////////////////////////////////////////////
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// code is optimized for power of 2 buffer sizes (16, 32, 64, 128, ...)
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// NOTE: the buffers are only used if the respective interrupt mode is
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// enabled
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#define UART0_RX_BUFFER_SIZE 256 // UART0 receive buffer size
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#define UART0_TX_BUFFER_SIZE 256 // UART0 transmit buffer size
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#define UART1_RX_BUFFER_SIZE 128 // UART1 receive buffer size
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#define UART1_TX_BUFFER_SIZE 256 // UART1 transmit buffer size
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///////////////////////////////////////////////////////////////////////////////
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// use the following macros to determine the 'baud' parameter values
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// for uart0Init() and uart1Init()
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// CAUTION - 'baud' SHOULD ALWAYS BE A CONSTANT or
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// a lot of code will be generated.
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#define UART_PCLK_DIV (2) // PCLKSEL0 is changed to div 2 is changed for UART for supporting 115k
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#define UART_BAUD(baud) (uint16_t)(((CCLK / UART_PCLK_DIV) / ((baud) * 16.0)) + 0.5)
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///////////////////////////////////////////////////////////////////////////////
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// Definitions for typical UART 'baud' settings
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#define B1200 UART_BAUD(1200)
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#define B2400 UART_BAUD(2400)
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#define B4800 UART_BAUD(4800)
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#define B9600 UART_BAUD(9600)
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#define B19200 UART_BAUD(19200)
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#define B38400 UART_BAUD(38400)
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#define B57600 UART_BAUD(57600)
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#define B115200 UART_BAUD(115200)
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///////////////////////////////////////////////////////////////////////////////
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// Definitions for typical UART 'mode' settings
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#define UART_8N1 (uint8_t)(ULCR_CHAR_8 + ULCR_PAR_NO + ULCR_STOP_1)
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#define UART_7N1 (uint8_t)(ULCR_CHAR_7 + ULCR_PAR_NO + ULCR_STOP_1)
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#define UART_8N2 (uint8_t)(ULCR_CHAR_8 + ULCR_PAR_NO + ULCR_STOP_2)
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#define UART_7N2 (uint8_t)(ULCR_CHAR_7 + ULCR_PAR_NO + ULCR_STOP_2)
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#define UART_8E1 (uint8_t)(ULCR_CHAR_8 + ULCR_PAR_EVEN + ULCR_STOP_1)
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#define UART_7E1 (uint8_t)(ULCR_CHAR_7 + ULCR_PAR_EVEN + ULCR_STOP_1)
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#define UART_8E2 (uint8_t)(ULCR_CHAR_8 + ULCR_PAR_EVEN + ULCR_STOP_2)
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#define UART_7E2 (uint8_t)(ULCR_CHAR_7 + ULCR_PAR_EVEN + ULCR_STOP_2)
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#define UART_8O1 (uint8_t)(ULCR_CHAR_8 + ULCR_PAR_ODD + ULCR_STOP_1)
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#define UART_7O1 (uint8_t)(ULCR_CHAR_7 + ULCR_PAR_ODD + ULCR_STOP_1)
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#define UART_8O2 (uint8_t)(ULCR_CHAR_8 + ULCR_PAR_ODD + ULCR_STOP_2)
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#define UART_7O2 (uint8_t)(ULCR_CHAR_7 + ULCR_PAR_ODD + ULCR_STOP_2)
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///////////////////////////////////////////////////////////////////////////////
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// Definitions for typical UART 'fmode' settings
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#define UART_FIFO_OFF (0x00)
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#define UART_FIFO_1 (uint8_t)(UFCR_FIFO_ENABLE + UFCR_FIFO_TRIG1)
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#define UART_FIFO_4 (uint8_t)(UFCR_FIFO_ENABLE + UFCR_FIFO_TRIG4)
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#define UART_FIFO_8 (uint8_t)(UFCR_FIFO_ENABLE + UFCR_FIFO_TRIG8)
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#define UART_FIFO_14 (uint8_t)(UFCR_FIFO_ENABLE + UFCR_FIFO_TRIG14)
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///////////////////////////////////////////////////////////////////////////////
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/******************************************************************************
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*
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* Function Name: uart0Init()
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*
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* Description:
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* This function initializes the UART for async mode
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*
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* Calling Sequence:
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* baudrate divisor - use UART0_BAUD macro
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* mode - see typical modes (above)
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* fmode - see typical fmodes (above)
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*
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* Returns:
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* void
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*
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* NOTE: uart0Init(UART_BAUD(9600), UART_8N1, UART_FIFO_8);
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*
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*****************************************************************************/
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void uart0Init(uint16_t baud, uint8_t mode, uint8_t fmode);
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/******************************************************************************
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*
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* Function Name: uart0Putch()
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*
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* Description:
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* This function puts a character into the UART output queue for
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* transmission.
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*
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* Calling Sequence:
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* character to be transmitted
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*
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* Returns:
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* ch on success, -1 on error (queue full)
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*
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*****************************************************************************/
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int uart0Putch(int ch);
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// same but blocking when no space available (mthomas)
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int uart0Putch_block(int ch);
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/******************************************************************************
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*
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* Function Name: uart0Space()
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*
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* Description:
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* This function gets the available space in the transmit queue
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*
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* Calling Sequence:
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* void
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*
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* Returns:
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* available space in the transmit queue
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*
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*****************************************************************************/
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uint16_t uart0Space(void);
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/******************************************************************************
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*
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* Function Name: uart0Puts()
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*
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* Description:
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* This function writes a NULL terminated 'string' to the UART output
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* queue, returning a pointer to the next character to be written.
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*
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* Calling Sequence:
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* address of the string
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*
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* Returns:
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* a pointer to the next character to be written
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* (\0 if full string is written)
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*
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*****************************************************************************/
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const char *uart0Puts(const char *string);
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// same but blocking when no space available (mthomas)
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const char *uart0Puts_block(const char *string);
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/******************************************************************************
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*
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* Function Name: uart0Write()
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*
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* Description:
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* This function writes 'count' characters from 'buffer' to the UART
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* output queue.
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*
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* Calling Sequence:
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*
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*
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* Returns:
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* 0 on success, -1 if insufficient room, -2 on error
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* NOTE: if insufficient room, no characters are written.
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*
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*****************************************************************************/
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int uart0Write(const char *buffer, uint16_t count);
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/******************************************************************************
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*
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* Function Name: uart0TxEmpty()
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*
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* Description:
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* This function returns the status of the UART transmit data
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* registers.
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*
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* Calling Sequence:
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* void
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*
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* Returns:
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* FALSE - either the tx holding or shift register is not empty
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* !FALSE - if both the tx holding & shift registers are empty
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*
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*****************************************************************************/
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int uart0TxEmpty(void);
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/******************************************************************************
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*
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* Function Name: uart0RxEmpty()
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*
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* Description:
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* This function checks the imput buffers
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*
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* Calling Sequence:
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* void
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*
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* Returns:
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* FALSE - either the tx holding or shift register is not empty
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* !FALSE - if both the tx holding & shift registers are empty
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*
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*****************************************************************************/
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int uart0RxEmpty(void);
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/******************************************************************************
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*
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* Function Name: uart0TxFlush()
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*
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* Description:
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* This function removes all characters from the UART transmit queue
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* (without transmitting them).
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*
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* Calling Sequence:
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* void
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*
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* Returns:
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* void
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*
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*****************************************************************************/
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void uart0TxFlush(void);
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/******************************************************************************
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*
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* Function Name: uart0Getch()
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*
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* Description:
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* This function gets a character from the UART receive queue
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*
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* Calling Sequence:
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* void
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*
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* Returns:
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* character on success, -1 if no character is available
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*
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*****************************************************************************/
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int uart0Getch(void);
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/******************************************************************************
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*
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* Function Name: uart1Init()
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*
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* Description:
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* This function initializes the UART for async mode
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*
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* Calling Sequence:
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* baudrate divisor - use UART_BAUD macro
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* mode - see typical modes (above)
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* fmode - see typical fmodes (above)
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*
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* Returns:
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* void
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*
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* NOTE: uart1Init(UART_BAUD(9600), UART_8N1, UART_FIFO_8);
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*
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*****************************************************************************/
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void uart1Init(uint16_t baud, uint8_t mode, uint8_t fmode);
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/******************************************************************************
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*
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* Function Name: uart1Putch()
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*
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* Description:
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* This function puts a character into the UART output queue for
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* transmission.
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*
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* Calling Sequence:
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* character to be transmitted
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*
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* Returns:
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* ch on success, -1 on error (queue full)
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*
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*****************************************************************************/
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int uart1Putch(int ch);
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// same but blocking when no space available (mthomas)
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int uart1Putch_block(int ch);
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/******************************************************************************
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*
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* Function Name: uart1Space()
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*
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* Description:
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* This function gets the available space in the transmit queue
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*
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* Calling Sequence:
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* void
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*
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* Returns:
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* available space in the transmit queue
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*
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*****************************************************************************/
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uint16_t uart1Space(void);
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/******************************************************************************
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*
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* Function Name: uart1Puts()
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*
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* Description:
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* This function writes a NULL terminated 'string' to the UART output
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* queue, returning a pointer to the next character to be written.
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*
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* Calling Sequence:
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* address of the string
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*
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* Returns:
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* a pointer to the next character to be written
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* (\0 if full string is written)
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*
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*****************************************************************************/
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const char *uart1Puts(const char *string);
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// same but blocking when no space available (mthomas)
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const char *uart1Puts_block(const char *string);
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/******************************************************************************
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*
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* Function Name: uart1Write()
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*
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* Description:
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* This function writes 'count' characters from 'buffer' to the UART
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* output queue.
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*
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* Calling Sequence:
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*
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*
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* Returns:
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* 0 on success, -1 if insufficient room, -2 on error
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* NOTE: if insufficient room, no characters are written.
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*
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*****************************************************************************/
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int uart1Write(const char *buffer, uint16_t count);
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/******************************************************************************
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*
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* Function Name: uart1TxEmpty()
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*
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* Description:
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* This function returns the status of the UART transmit data
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* registers.
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*
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* Calling Sequence:
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* void
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*
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* Returns:
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* FALSE - either the tx holding or shift register is not empty
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* !FALSE - if both the tx holding & shift registers are empty
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*
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*****************************************************************************/
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int uart1TxEmpty(void);
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/******************************************************************************
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*
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* Function Name: uart1RxEmpty()
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*
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* Description:
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* This function checks the imput buffers
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*
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* Calling Sequence:
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* void
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*
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* Returns:
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* FALSE - either the tx holding or shift register is not empty
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* !FALSE - if both the tx holding & shift registers are empty
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*
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*****************************************************************************/
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int uart1RxEmpty(void);
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/******************************************************************************
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*
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* Function Name: uart1TxFlush()
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*
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* Description:
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* This function removes all characters from the UART transmit queue
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* (without transmitting them).
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*
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* Calling Sequence:
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* void
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*
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* Returns:
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* void
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*
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*****************************************************************************/
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void uart1TxFlush(void);
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/******************************************************************************
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*
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* Function Name: uart1Getch()
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*
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* Description:
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* This function gets a character from the UART receive queue
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*
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* Calling Sequence:
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* void
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*
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* Returns:
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* character on success, -1 if no character is available
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*
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*****************************************************************************/
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int uart1Getch(void);
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#endif
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