msp430_regs.h

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/*
 * Copyright (C) 2015 Freie Universität Berlin
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */
 
#ifndef F2XX_G2XX_MSP430_REGS_H
#define F2XX_G2XX_MSP430_REGS_H
 
#include <stdint.h>
#include <stddef.h>
 
#include "msp430_regs_common.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define MSP430_USCI_A_B_OFFSET  3U
 
#define MSP430_USCI_B_FROM_USCI_A(usci_a) \
    ((msp430_usci_b_t *)((uintptr_t)(usci_a) + MSP430_USCI_A_B_OFFSET))
 
typedef struct {
    REG8    ABCTL;      
    REG8    IRTCTL;     
    REG8    IRRCTL;     
    REG8    CTL0;       
    REG8    CTL1;       
    REG8    BR0;        
    REG8    BR1;        
    REG8    MCTL;       
    REG8    STAT;       
    REG8    RXBUF;      
    REG8    TXBUF;      
} msp430_usci_a_t;
 
typedef struct {
    REG8    CTL0;       
    REG8    CTL1;       
    REG8    BR0;        
    REG8    BR1;        
    REG8    MCTL;       
    REG8    STAT;       
    REG8    RXBUF;      
    REG8    TXBUF;      
} msp430_usci_b_t;
 
#define UCSSEL_UCLKI    UCSSEL_0    
#define UCSSEL_ACLK     UCSSEL_1    
#define UCSSEL_SMCLK    UCSSEL_2    
#if (UCSSEL0 == 0x40) || DOXYGEN
#  define UCSSEL_Pos 6      
#else
#  error "USSEL field in USCI CTL1 register is at unexpected position"
#endif
#define UCBRS_MASK  UCBRS_7     
#if (UCBRS_7 == 0x0E) || defined(DOXYGEN)
#  define UCBRS_Pos     1       
#else
/* The datasheet for the whole MCU family states the field is in bits 3-1,
 * but let's better be safe than sorry here */
#  error  "UCBRS field in the UCAxMCTL register at unexpected position."
#endif
 
static inline msp430_usci_b_t * msp430_usci_b_from_usci_a(msp430_usci_a_t *usci_a)
{
    uintptr_t usci_b = (uintptr_t)usci_a + offsetof(msp430_usci_a_t, CTL0);
    return (msp430_usci_b_t *)usci_b;
}
 
extern msp430_usci_a_t USCI_A0;
extern msp430_usci_a_t USCI_A1;
extern msp430_usci_b_t USCI_B0;
extern msp430_usci_b_t USCI_B1;
#ifdef __cplusplus
}
#endif
 
#endif /* F2XX_G2XX_MSP430_REGS_H */