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Improved interface and C standard compatibility.
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nvt-se
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6983417307
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9017949535
@ -32,19 +32,11 @@ whether in contract, strict liability, or tort (including negligence
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or otherwise) arising in any way out of the use of this software, even
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if advised of the possibility of such damage.
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This implementation was developed by the CST group at the FUB.
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For documentation and questions please use the web site
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http://scatterweb.mi.fu-berlin.de and the mailinglist
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scatterweb@lists.spline.inf.fu-berlin.de (subscription via the Website).
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Berlin, 2007
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*/
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/**
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* @file ScatterWeb.Uart.c
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* @addtogroup interfaces
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* @brief UART interface
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* @author Michael Baar <baar@inf.fu-berlin.de>
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* \file UART interface
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* \author Michael Baar <baar@inf.fu-berlin.de>
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*
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* UART switch for RS232 and SPI protocols on UART1 written for
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* ScatterWeb MSB boards. Compatible to ScatterWeb EOS,
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@ -62,37 +54,36 @@ Berlin, 2007
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#define U1ME ME2
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#endif
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void _uart_configure(unsigned char mode);
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void _uart_set_mode(unsigned char mode);
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static void uart_configure(unsigned char mode);
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static void uart_set_mode(unsigned char mode);
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volatile unsigned char uart_mode = UART_MODE_RESET;
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volatile unsigned char uart_lockcnt = 0;
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static volatile unsigned char uart_mode = UART_MODE_RESET;
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static volatile unsigned char uart_lockcnt;
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static unsigned char _uart_speed_br0[UART_NUM_MODES];
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static unsigned char _uart_speed_br1[UART_NUM_MODES];
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static unsigned char _uart_speed_bmn[UART_NUM_MODES];
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static fp_uart_handler _uart_handler[UART_NUM_MODES] = {NULL, NULL};
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static unsigned char uart_speed_br0[UART_NUM_MODES];
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static unsigned char uart_speed_br1[UART_NUM_MODES];
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static unsigned char uart_speed_bmn[UART_NUM_MODES];
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static fp_uart_handler uart_handler[UART_NUM_MODES];
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/*---------------------------------------------------------------------------*/
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void
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uart_set_speed(unsigned char mode, unsigned char ubr0,
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unsigned char ubr1, unsigned char umctl)
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{
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// store setting
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_uart_speed_br0[mode] = ubr0; // baudrate
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_uart_speed_br1[mode] = ubr1; // baudrate
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_uart_speed_bmn[mode] = umctl; // modulation
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uart_speed_br0[mode] = ubr0; // baudrate
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uart_speed_br1[mode] = ubr1; // baudrate
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uart_speed_bmn[mode] = umctl; // modulation
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// reconfigure, if mode active
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if (uart_mode == mode)
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_uart_configure(mode);
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uart_configure(mode);
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}
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/*---------------------------------------------------------------------------*/
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void
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uart_set_handler(unsigned char mode, fp_uart_handler fpHandler)
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{
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// store setting
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_uart_handler[mode] = fpHandler;
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uart_handler[mode] = fpHandler;
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if (mode == uart_mode) {
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if (fpHandler == NULL)
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IE2 &= ~URXIE1; // Disable USART1 RX interrupt
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@ -100,30 +91,28 @@ uart_set_handler(unsigned char mode, fp_uart_handler fpHandler)
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IE2 |= URXIE1; // Enable USART1 RX interrupt
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}
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}
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/*---------------------------------------------------------------------------*/
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char
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int
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uart_lock(unsigned char mode)
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{
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// already locked?
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if ((mode != uart_mode) && (uart_lockcnt)) {
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return 0;
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} else {
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// increase lock count
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uart_lockcnt++;
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// switch mode (if neccessary)
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_uart_set_mode(mode);
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return 1;
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return FALSE;
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}
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// increase lock count
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uart_lockcnt++;
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// switch mode (if neccessary)
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uart_set_mode(mode);
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return TRUE;
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}
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/*---------------------------------------------------------------------------*/
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char
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int
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uart_unlock(unsigned char mode)
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{
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/*
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Do we wan't strict checking?
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if( (uart_lockcnt == 0) || (mode != uart_mode) )
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return false;
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*/
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/* Strict checking. */
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if (mode != uart_mode)
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return FALSE;
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// decrement lock
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if (uart_lockcnt > 0) {
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@ -131,28 +120,26 @@ uart_unlock(unsigned char mode)
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// if no more locks, switch back to default mode
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if (uart_lockcnt == 0) {
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_uart_set_mode(UART_MODE_DEFAULT);
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uart_set_mode(UART_MODE_DEFAULT);
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}
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return 1;
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return TRUE;
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}
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return 0;
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return FALSE;
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}
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/*---------------------------------------------------------------------------*/
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void
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_uart_configure(unsigned char mode)
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static void
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uart_configure(unsigned char mode)
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{
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_DINT(); // disable interrupts
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_DINT();
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UART_WAIT_TXDONE();
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// wait till all buffered data has been transmitted
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// configure
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if (mode == UART_MODE_RS232) {
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P5OUT |= 0x01;
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// unselect SPI
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P3SEL |= 0xC0;
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// select rs232
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// to RS232 mode
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// select rs232 to RS232 mode
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UCTL1 = SWRST | CHAR; // 8-bit character
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UTCTL1 |= SSEL1; // UCLK = MCLK
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// activate
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@ -170,33 +157,32 @@ _uart_configure(unsigned char mode)
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}
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// restore speed settings
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UBR01 = _uart_speed_br0[mode]; // set baudrate
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UBR11 = _uart_speed_br1[mode];
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UMCTL1 = _uart_speed_bmn[mode]; // set modulation
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UBR01 = uart_speed_br0[mode]; // set baudrate
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UBR11 = uart_speed_br1[mode];
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UMCTL1 = uart_speed_bmn[mode]; // set modulation
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UCTL1 &= ~SWRST; // clear reset flag
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_EINT(); // enable interrupts
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}
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/*---------------------------------------------------------------------------*/
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void
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_uart_set_mode(unsigned char mode)
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static void
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uart_set_mode(unsigned char mode)
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{
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// do nothing if mode already set
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if( mode == uart_mode )
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if (mode == uart_mode )
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return;
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IE2 &= ~(URXIE1 | UTXIE1); // disable irq
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_uart_configure(mode); // configure uart parameters
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uart_configure(mode); // configure uart parameters
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uart_mode = mode;
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if (_uart_handler[mode] != NULL)
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if (uart_handler[mode] != NULL)
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IE2 |= URXIE1; // Enable USART1 RX interrupt
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}
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/*---------------------------------------------------------------------------*/
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interrupt(UART1RX_VECTOR)_uart_rx(void)
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interrupt(UART1RX_VECTOR) uart_rx(void)
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{
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fp_uart_handler handler = _uart_handler[uart_mode];
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fp_uart_handler handler = uart_handler[uart_mode];
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/* Check status register for receive errors. - before reading RXBUF since
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it clears the error and interrupt flags */
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@ -209,3 +195,9 @@ interrupt(UART1RX_VECTOR)_uart_rx(void)
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UART_RX;
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}
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}
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int
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uart_get_mode(void)
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{
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return uart_mode;
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}
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@ -110,9 +110,11 @@ void uart_set_speed(unsigned char mode, unsigned char ubr0, unsigned char ubr1,
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void uart_set_handler(unsigned char mode, fp_uart_handler fpHandler);
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char uart_lock(unsigned char mode);
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int uart_lock(unsigned char mode);
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char uart_unlock(unsigned char mode);
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int uart_unlock(unsigned char mode);
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int uart_get_mode(void);
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#endif /* __UART_H__ */
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