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Fix in sam SPI library initialization when using multiple CS (extended API).

Browse Source 
http://forum.arduino.cc/index.php?topic=189682.0
This commit is contained in:
Cristian Maglie
2013-09-24 14:20:23 +02:00
parent ca90bf75cb
commit b0dc317422
3 changed files with 17 additions and 7 deletions
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20
libraries/SPI/arch/sam/SPI.cpp
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@ -11,15 +11,13 @@
#include "SPI_Class.h"
SPIClass::SPIClass(Spi *_spi, uint32_t _id, void(*_initCb)(void)) :
spi(_spi), id(_id), initCb(_initCb)
spi(_spi), id(_id), initCb(_initCb), initialized(false)
{
// Empty
}
void SPIClass::begin() {
initCb();
SPI_Configure(spi, id, SPI_MR_MSTR | SPI_MR_PS | SPI_MR_MODFDIS);
SPI_Enable(spi);
init();
// NPCS control is left to the user
@ -30,9 +28,7 @@ void SPIClass::begin() {
}
void SPIClass::begin(uint8_t _pin) {
initCb();
SPI_Configure(spi, id, SPI_MR_MSTR | SPI_MR_PS | SPI_MR_MODFDIS);
SPI_Enable(spi);
init();
uint32_t spiPin = BOARD_PIN_TO_SPI_PIN(_pin);
PIO_Configure(
@ -47,6 +43,15 @@ void SPIClass::begin(uint8_t _pin) {
setBitOrder(_pin, MSBFIRST);
}
void SPIClass::init() {
if (initialized)
return;
initCb();
SPI_Configure(spi, id, SPI_MR_MSTR | SPI_MR_PS | SPI_MR_MODFDIS);
SPI_Enable(spi);
initialized = true;
}
void SPIClass::end(uint8_t _pin) {
uint32_t spiPin = BOARD_PIN_TO_SPI_PIN(_pin);
// Setting the pin as INPUT will disconnect it from SPI peripheral
@ -55,6 +60,7 @@ void SPIClass::end(uint8_t _pin) {
void SPIClass::end() {
SPI_Disable(spi);
initialized = false;
}
void SPIClass::setBitOrder(uint8_t _pin, BitOrder _bitOrder) {