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Merge branch 'uart-fix' into new-extension

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Conflicts:
	hardware/sam/cores/sam/Arduino.h
This commit is contained in:
Cristian Maglie 2011-11-18 11:55:03 +01:00
commit 062278262d
3 changed files with 19 additions and 23 deletions
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11
hardware/sam/cores/sam/Arduino.h
View File

@ -35,7 +35,7 @@ extern "C"{
#define clockCyclesPerMicrosecond() ( SystemCoreClock / 1000000L )
#define clockCyclesToMicroseconds(a) ( ((a) * 1000L) / (SystemCoreClock / 1000L) )
#define microsecondsToClockCycles(a) ( ((a) * (SystemCoreClock / 1000L)) / 1000L )
#define microsecondsToClockCycles(a) ( (a) * (SystemCoreClock / 1000000L) )
#include "wiring.h"
@ -53,15 +53,13 @@ extern void loop( void ) ;
//
// These perform slightly better as macros compared to inline functions
//
#define digitalPinToPort( ulPin ) ( g_APinDescription[ulPin].pPort )
#define digitalPinToBitMask( ulPin ) ( g_APinDescription[ulPin].dwPin )
/*
#define digitalPinToPort( ulPin ) ( g_APinDescription[ulPin]->pPort->PIO_PDSR )
#define digitalPinToBitMask( ulPin ) ( g_APinDescription[ulPin]->dwPin )
#define digitalPinToTimer( P ) ( )
#define analogInPinToBit( P ) ( P )
#define portOutputRegister( P ) ( )
#define portInputRegister( P ) ( )
#define portModeRegister( P ) ( )
*/
//#define NOT_A_PIN 0 // defined in pio.h/EPioType
#define NOT_A_PORT 0
@ -85,7 +83,7 @@ typedef enum _EExt_Interrupts
typedef void (*voidFuncPtr)( void ) ;
/* Define attribute */
#if defined ( __CC_ARM ) /* Keil <EFBFBD>Vision 4 */
#if defined ( __CC_ARM ) /* Keil uVision 4 */
#define WEAK (__attribute__ ((weak)))
#elif defined ( __ICCARM__ ) /* IAR Ewarm 5.41+ */
#define WEAK __weak
@ -149,6 +147,7 @@ extern const PinDescription g_APinDescription[] ;
#include "Tone.h"
#include "WMath.h"
#include "HardwareSerial.h"
#include "wiring_pulse.h"
#endif // __cplusplus
#endif // Arduino_h

6
hardware/sam/cores/sam/UARTClass.cpp
View File

@ -120,10 +120,8 @@ void UARTClass::flush( void )
void UARTClass::write( const uint8_t uc_data )
{
/* Check if the transmitter is ready */
if ( (_pUart->UART_SR & UART_SR_TXRDY) != UART_SR_TXRDY )
{
return ;
}
while ( (_pUart->UART_SR & UART_SR_TXRDY) != UART_SR_TXRDY )
;
/* Send character */
_pUart->UART_THR = uc_data ;

25
hardware/sam/cores/sam/wiring_pulse.c.disabled → hardware/sam/cores/sam/wiring_pulse.cpp
View File

@ -16,47 +16,46 @@
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "Arduino.h"
#include "wiring_private.h"
/* Measures the length (in microseconds) of a pulse on the pin; state is HIGH
* or LOW, the type of pulse to measure. Works on pulses from 2-3 microseconds
* to 3 minutes in length, but must be called at least a few dozen microseconds
* before the start of the pulse. */
extern uint32_t pulseIn( uint32_t ulPin, uint32_t ulState, uint32_t ulTimeout )
extern uint32_t pulseIn( uint32_t pin, uint32_t state, uint32_t timeout )
{
// cache the port and bit of the pin in order to speed up the
// pulse width measuring loop and achieve finer resolution. calling
// digitalRead() instead yields much coarser resolution.
uint8_t bit = digitalPinToBitMask(pin);
uint8_t port = digitalPinToPort(pin);
uint8_t stateMask = (state ? bit : 0);
unsigned long width = 0; // keep initialization out of time critical area
PinDescription p = g_APinDescription[pin];
uint32_t width = 0; // keep initialization out of time critical area
// convert the timeout from microseconds to a number of times through
// the initial loop; it takes 16 clock cycles per iteration.
unsigned long numloops = 0;
unsigned long maxloops = microsecondsToClockCycles(timeout) / 16;
// the initial loop; it takes 22 clock cycles per iteration.
uint32_t numloops = 0;
uint32_t maxloops = microsecondsToClockCycles(timeout) / 22;
// wait for any previous pulse to end
while ((*portInputRegister(port) & bit) == stateMask)
while (PIO_Get(p.pPort, PIO_INPUT, p.ulPin) == state)
if (numloops++ == maxloops)
return 0;
// wait for the pulse to start
while ((*portInputRegister(port) & bit) != stateMask)
while (PIO_Get(p.pPort, PIO_INPUT, p.ulPin) != state)
if (numloops++ == maxloops)
return 0;
// wait for the pulse to stop
while ((*portInputRegister(port) & bit) == stateMask) {
while (PIO_Get(p.pPort, PIO_INPUT, p.ulPin) == state) {
if (numloops++ == maxloops)
return 0;
width++;
}
// convert the reading to microseconds. The loop has been determined
// to be 20 clock cycles long and have about 16 clocks between the edge
// to be 22 clock cycles long and have about 16 clocks between the edge
// and the start of the loop. There will be some error introduced by
// the interrupt handlers.
return clockCyclesToMicroseconds(width * 21 + 16);
return clockCyclesToMicroseconds(width * 22 + 16);
}