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Amiga Format CD 42
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Amiga Format AFCD42 (Issue 126, Aug 1999).iso
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ioblixdevkit
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c
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include
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ioblix
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uart.h
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1999-05-14
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/*
** $VER: ioblix/uart.h 37.3 (7.4.99)
**
** include file for access to IOBlix UARTs
**
** (C) Copyright 1998,1999 Thore Böckelmann
** All Rights Reserved.
*/
#ifndef IOBLIX_UART_H
#define IOBLIX_UART_H 1
#define UART_RX 0
#define UART_TX 0
#define UART_DLL 0
#define UART_IER 1
#define UART_DLM 1
#define UART_IIR 2
#define UART_FCR 2
#define UART_EFR 2
#define UART_LCR 3
#define UART_MCR 4
#define UART_XON1 4
#define UART_LSR 5
#define UART_XON2 5
#define UART_MSR 6
#define UART_XOFF1 6
#define UART_SCR 7
#define UART_XOFF2 7
#define UART_REG_COUNT 8
/*
The old static structures are now obsolete now and have been completely erased.
These new definitions allow a much more hardware independent way to access different,
but very similar chips (ie serial UARTs 16C650 and 16C654, which have the same registers,
but at different addresses.
*/
struct UARTRegisters {
ULONG ur_RegCount;
volatile UBYTE *ur_Regs[UART_REG_COUNT];
};
#define ur_rx ur_Regs[UART_RX]
#define ur_tx ur_Regs[UART_TX]
#define ur_dll ur_Regs[UART_DLL]
#define ur_ier ur_Regs[UART_IER]
#define ur_dlm ur_Regs[UART_DLM]
#define ur_iir ur_Regs[UART_IIR]
#define ur_fcr ur_Regs[UART_FCR]
#define ur_efr ur_Regs[UART_EFR]
#define ur_lcr ur_Regs[UART_LCR]
#define ur_mcr ur_Regs[UART_MCR]
#define ur_xon1 ur_Regs[UART_XON1]
#define ur_lsr ur_Regs[UART_LSR]
#define ur_xon2 ur_Regs[UART_XON2]
#define ur_msr ur_Regs[UART_MSR]
#define ur_xoff1 ur_Regs[UART_XOFF1]
#define ur_scr ur_Regs[UART_SCR]
#define ur_xoff2 ur_Regs[UART_XOFF2]
/*
* These are the definitions for the FIFO Control Register
* (16650 only)
*/
#define UART_FCR_ENABLE_FIFO 0x01 /* Enable the FIFO */
#define UART_FCR_CLEAR_RCVR 0x02 /* Clear the RCVR FIFO */
#define UART_FCR_CLEAR_XMIT 0x04 /* Clear the XMIT FIFO */
#define UART_FCR_DMA_SELECT 0x08 /* For DMA applications */
#define UART_FCR_TRIGGER_MASK 0xC0 /* Mask for the FIFO trigger range */
#define UART_FCR_TRIGGER_1 0x00 /* Mask for trigger set at 1 */
#define UART_FCR_TRIGGER_4 0x40 /* Mask for trigger set at 4 */
#define UART_FCR_TRIGGER_8 0x80 /* Mask for trigger set at 8 */
#define UART_FCR_TRIGGER_14 0xC0 /* Mask for trigger set at 14 */
/* 16650A redefinitions */
#define UART_FCR0_R_TRIGGER_8 0x00 /* Mask for receive trigger set at 8 */
#define UART_FCR0_R_TRIGGER_16 0x40 /* Mask for receive trigger set at 16 */
#define UART_FCR0_R_TRIGGER_24 0x80 /* Mask for receive trigger set at 24 */
#define UART_FCR0_R_TRIGGER_28 0xC0 /* Mask for receive trigger set at 28 */
#define UART_FCR0_T_TRIGGER_8 0x10 /* Mask for transmit trigger set at 8 */
#define UART_FCR0_T_TRIGGER_16 0x00 /* Mask for transmit trigger set at 16 */
#define UART_FCR0_T_TRIGGER_24 0x20 /* Mask for transmit trigger set at 24 */
#define UART_FCR0_T_TRIGGER_30 0x30 /* Mask for transmit trigger set at 30 */
/* 16654 redefinitions */
#define UART_FCR4_R_TRIGGER_8 0x00 /* Mask for receive trigger set at 8 */
#define UART_FCR4_R_TRIGGER_16 0x40 /* Mask for receive trigger set at 16 */
#define UART_FCR4_R_TRIGGER_56 0x80 /* Mask for receive trigger set at 56 */
#define UART_FCR4_R_TRIGGER_60 0xC0 /* Mask for receive trigger set at 60 */
#define UART_FCR4_T_TRIGGER_8 0x00 /* Mask for transmit trigger set at 8 */
#define UART_FCR4_T_TRIGGER_16 0x10 /* Mask for transmit trigger set at 16 */
#define UART_FCR4_T_TRIGGER_32 0x20 /* Mask for transmit trigger set at 32 */
#define UART_FCR4_T_TRIGGER_56 0x30 /* Mask for transmit trigger set at 56 */
/* TI 16750 definitions */
#define UART_FCR7_64BYTE 0x20 /* Go into 64 byte mode */
/*
* These are the definitions for the Line Control Register
*
* Note: if the word length is 5 bits (UART_LCR_WLEN5), then setting
* UART_LCR_STOP will select 1.5 stop bits, not 2 stop bits.
*/
#define UART_LCR_DLAB 0x80 /* Divisor latch access bit */
#define UART_LCR_SBC 0x40 /* Set break control */
#define UART_LCR_SPAR 0x20 /* Mark/Space parity select */
#define UART_LCR_EPAR 0x10 /* Odd/Even parity select */
#define UART_LCR_PARITY 0x08 /* Parity Enable */
#define UART_LCR_STOP 0x04 /* Stop bits: 0=1 stop bit, 1= 2 stop bits */
#define UART_LCR_WLEN5 0x00 /* Wordlength: 5 bits */
#define UART_LCR_WLEN6 0x01 /* Wordlength: 6 bits */
#define UART_LCR_WLEN7 0x02 /* Wordlength: 7 bits */
#define UART_LCR_WLEN8 0x03 /* Wordlength: 8 bits */
/*
* These are the definitions for the Line Status Register
*/
#define UART_LSR_ERROR 0x80 /* Any error happend */
#define UART_LSR_TEMT 0x40 /* Transmitter empty */
#define UART_LSR_THRE 0x20 /* Transmit-hold-register empty */
#define UART_LSR_BI 0x10 /* Break interrupt indicator */
#define UART_LSR_FE 0x08 /* Frame error indicator */
#define UART_LSR_PE 0x04 /* Parity error indicator */
#define UART_LSR_OE 0x02 /* Overrun error indicator */
#define UART_LSR_DR 0x01 /* Receiver data ready */
/*
* These are the definitions for the Interrupt Identification Register
*/
#define UART_IIR_NO_INT 0x01 /* No interrupts pending */
#define UART_IIR_ID 0x06 /* Mask for the interrupt ID */
#define UART_IIR_MSI 0x00 /* Modem status interrupt */
#define UART_IIR_THRI 0x02 /* Transmitter holding register empty */
#define UART_IIR_RDI 0x04 /* Receiver data interrupt */
#define UART_IIR_RLSI 0x06 /* Receiver line status interrupt */
#define UART_IIR_XOFF 0x10 /* Xoff interrupt */
/*
* These are the definitions for the Interrupt Enable Register
*/
#define UART_IER_CTS 0x80 /* Enable Modem CTS interrupt */
#define UART_IER_RTS 0x40 /* Enable Modem RTS interrupt */
#define UART_IER_XOFF 0x20 /* Enable Modem Xoff interrupt */
#define UART_IER_MSI 0x08 /* Enable Modem status interrupt */
#define UART_IER_RLSI 0x04 /* Enable receiver line status interrupt */
#define UART_IER_THRI 0x02 /* Enable Transmitter holding register int. */
#define UART_IER_RDI 0x01 /* Enable receiver data interrupt */
/*
* Sleep mode for ST16650 and TI16750.
* Note that for 16650, EFR-bit 4 must be selected as well.
*/
#define UART_IERX_SLEEP 0x10 /* Enable sleep mode */
/*
* These are the definitions for the Modem Control Register
*/
#define UART_MCR_CLOCK4 0x80 /* Clock division by 4 */
#define UART_MCR_IRDA 0x40 /* IR enable */
#define UART_MCR_IRQ 0x20 /* IRQ select, 16c650 only */
#define UART_MCR_LOOP 0x10 /* Enable loopback test mode */
#define UART_MCR_OUT2 0x08 /* Out2 complement */
#define UART_MCR_OUT1 0x04 /* Out1 complement */
#define UART_MCR_RTS 0x02 /* RTS complement */
#define UART_MCR_DTR 0x01 /* DTR complement */
/*
* These are the definitions for the Modem Status Register
*/
#define UART_MSR_DCD 0x80 /* Data Carrier Detect */
#define UART_MSR_RI 0x40 /* Ring Indicator */
#define UART_MSR_DSR 0x20 /* Data Set Ready */
#define UART_MSR_CTS 0x10 /* Clear to Send */
#define UART_MSR_DDCD 0x08 /* Delta DCD */
#define UART_MSR_TERI 0x04 /* Trailing edge ring indicator */
#define UART_MSR_DDSR 0x02 /* Delta DSR */
#define UART_MSR_DCTS 0x01 /* Delta CTS */
#define UART_MSR_ANY_DELTA 0x0F /* Any of the delta bits! */
/*
* These are the definitions for the Extended Features Register
* (StarTech 16C660 only, when DLAB=1)
*/
#define UART_EFR_CTS 0x80 /* CTS flow control */
#define UART_EFR_RTS 0x40 /* RTS flow control */
#define UART_EFR_SCD 0x20 /* Special character detect */
#define UART_EFR_ECB 0x10 /* Enhanced control bit */
/*
* the low four bits control software flow control
*/
#endif /* IOBLIX_UART_H */