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cleaned up and fixed an error checking problem in the locking code.

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This commit is contained in:
nvt-se 2008-02-28 15:11:22 +00:00
parent cefaa38581
commit 2cc0135e35
2 changed files with 91 additions and 105 deletions
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166
platform/msb430/dev/msb430-uart1.c
View file

@ -62,90 +62,22 @@ Berlin, 2007
#define U1ME ME2
#endif
void _uart_configure(unsigned char mode);
void _uart_set_mode(unsigned char mode);
volatile unsigned char uart_mode = UART_MODE_RESET;
volatile unsigned char uart_lockcnt = 0;
static volatile unsigned char uart_mode = UART_MODE_RESET;
static volatile unsigned char uart_lockcnt = 0;
volatile uint8_t uart_edge = 0;
static unsigned char _uart_speed_br0[UART_NUM_MODES];
static unsigned char _uart_speed_br1[UART_NUM_MODES];
static unsigned char _uart_speed_bmn[UART_NUM_MODES];
static fp_uart_handler _uart_handler[UART_NUM_MODES] = {NULL, NULL};
static unsigned char uart_speed_br0[UART_NUM_MODES];
static unsigned char uart_speed_br1[UART_NUM_MODES];
static unsigned char uart_speed_bmn[UART_NUM_MODES];
static fp_uart_handler uart_handler[UART_NUM_MODES] = {NULL, NULL};
/*---------------------------------------------------------------------------*/
void
uart_set_speed(unsigned char mode, unsigned char ubr0,
unsigned char ubr1, unsigned char umctl)
{
// store setting
_uart_speed_br0[mode] = ubr0; // baudrate
_uart_speed_br1[mode] = ubr1; // baudrate
_uart_speed_bmn[mode] = umctl; // modulation
// reconfigure, if mode active
if (uart_mode == mode)
_uart_configure(mode);
}
/*---------------------------------------------------------------------------*/
void
uart_set_handler(unsigned char mode, fp_uart_handler fpHandler)
{
// store setting
_uart_handler[mode] = fpHandler;
if (mode == uart_mode) {
if (fpHandler == NULL)
IE2 &= ~URXIE1; // Disable USART1 RX interrupt
else
IE2 |= URXIE1; // Enable USART1 RX interrupt
}
}
/*---------------------------------------------------------------------------*/
int
uart_lock(unsigned char mode)
{
// already locked?
if ((mode != uart_mode) && (uart_lockcnt)) {
return 0;
} else {
// increase lock count
uart_lockcnt++;
// switch mode (if neccessary)
_uart_set_mode(mode);
return 1;
}
}
/*---------------------------------------------------------------------------*/
int
uart_unlock(unsigned char mode)
{
/*
Do we wan't strict checking?
if( (uart_lockcnt == 0) || (mode != uart_mode) )
return false;
*/
// decrement lock
if (uart_lockcnt > 0) {
uart_lockcnt--;
// if no more locks, switch back to default mode
if (uart_lockcnt == 0) {
_uart_set_mode(UART_MODE_DEFAULT);
}
return 1;
}
return 0;
}
/*---------------------------------------------------------------------------*/
void
_uart_configure(unsigned char mode)
static void
uart_configure(unsigned mode)
{
_DINT(); // disable interrupts
UART_WAIT_TXDONE();
// wait till all buffered data has been transmitted
UART_WAIT_TXDONE(); // wait till all buffered data has been transmitted
// configure
if (mode == UART_MODE_RS232) {
@ -171,26 +103,89 @@ _uart_configure(unsigned char mode)
}
// restore speed settings
UBR01 = _uart_speed_br0[mode]; // set baudrate
UBR11 = _uart_speed_br1[mode];
UMCTL1 = _uart_speed_bmn[mode]; // set modulation
UBR01 = uart_speed_br0[mode]; // set baudrate
UBR11 = uart_speed_br1[mode];
UMCTL1 = uart_speed_bmn[mode]; // set modulation
UCTL1 &= ~SWRST; // clear reset flag
_EINT(); // enable interrupts
}
/*---------------------------------------------------------------------------*/
void
_uart_set_mode(unsigned char mode)
uart_set_speed(unsigned mode, unsigned ubr0,
unsigned ubr1, unsigned umctl)
{
// store setting
uart_speed_br0[mode] = ubr0; // baudrate
uart_speed_br1[mode] = ubr1; // baudrate
uart_speed_bmn[mode] = umctl; // modulation
// reconfigure, if mode active
if (uart_mode == mode)
uart_configure(mode);
}
/*---------------------------------------------------------------------------*/
void
uart_set_handler(unsigned mode, fp_uart_handler fpHandler)
{
// store setting
uart_handler[mode] = fpHandler;
if (mode == uart_mode) {
if (fpHandler == NULL) {
IE2 &= ~URXIE1; // Disable USART1 RX interrupt
} else {
IE2 |= URXIE1; // Enable USART1 RX interrupt
}
}
}
/*---------------------------------------------------------------------------*/
int
uart_lock(unsigned mode)
{
// already locked?
if (uart_lockcnt > 0) {
return 0;
}
// increase lock count
uart_lockcnt++;
// switch mode (if neccessary)
uart_set_mode(mode);
return 1;
}
/*---------------------------------------------------------------------------*/
int
uart_unlock(unsigned mode)
{
if ((uart_lockcnt == 0) || (mode != uart_mode)) {
return 0;
}
// decrement lock
if (uart_lockcnt > 0) {
uart_lockcnt--;
// if no more locks, switch back to default mode
if (uart_lockcnt == 0) {
uart_set_mode(UART_MODE_DEFAULT);
}
return 1;
}
return 0;
}
/*---------------------------------------------------------------------------*/
void
uart_set_mode(unsigned mode)
{
// do nothing if mode already set
if (mode == uart_mode)
return;
IE2 &= ~(URXIE1 | UTXIE1); // disable irq
_uart_configure(mode); // configure uart parameters
uart_configure(mode); // configure uart parameters
uart_mode = mode;
if (_uart_handler[mode] != NULL)
if (uart_handler[mode] != NULL)
IE2 |= URXIE1; // Enable USART1 RX interrupt
}
/*---------------------------------------------------------------------------*/
@ -200,9 +195,10 @@ uart_get_mode(void)
return uart_mode;
}
/*---------------------------------------------------------------------------*/
interrupt(UART1RX_VECTOR)_uart_rx(void)
interrupt(UART1RX_VECTOR)
uart_rx(void)
{
fp_uart_handler handler = _uart_handler[uart_mode];
fp_uart_handler handler = uart_handler[uart_mode];
int c;
if (!(IFG2 & URXIFG1)) {

28
platform/msb430/dev/msb430-uart1.h
View file

@ -58,8 +58,8 @@ Berlin, 2007
* Header file for MSP430 UART driver.
*/
#ifndef __UART_H__
#define __UART_H__
#ifndef MSB430_UART_H
#define MSB430_UART_H
#define UART_RX RXBUF1
#define UART_TX TXBUF1
@ -89,14 +89,7 @@ extern volatile unsigned char uart_lockcnt;
#define UART_WAIT_LOCK(x) ( (uart_mode != x ) && (uart_lockcnt) )
#define UART_MODE_IS(x) ( uart_mode == x )
#if 0
#ifdef __SCATTERWEB__
typedef void(*fp_uart_handler)(void);
#else
typedef unsigned int(*fp_uart_handler)(unsigned char);
#endif
#endif
typedef unsigned int(*fp_uart_handler)(unsigned char);
typedef unsigned int(*fp_uart_handler)(unsigned char);
/**
* \brief Initialize the UART module
@ -106,17 +99,14 @@ extern volatile unsigned char uart_lockcnt;
*/
void uart_init(void);
void uart_set_speed(unsigned char mode, unsigned char ubr0, unsigned char ubr1, unsigned char umctl);
void uart_set_handler(unsigned char mode, fp_uart_handler fpHandler);
int uart_lock(unsigned char mode);
int uart_unlock(unsigned char mode);
void uart_set_speed(unsigned mode, unsigned ubr0, unsigned ubr1, unsigned umctl);
void uart_set_handler(unsigned mode, fp_uart_handler fpHandler);
int uart_lock(unsigned mode);
int uart_unlock(unsigned mode);
void uart_set_mode(unsigned);
int uart_get_mode(void);
#endif /* __UART_H__ */
#endif /* !UART_H */
/** @} */
/** @} */