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SPI - constness for tx buffer

pull/1169/head
0xc0170 2015-06-08 16:39:42 +01:00
parent 4e503efe2e
commit 614c5539bc
4 changed files with 18 additions and 18 deletions
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12
libraries/mbed/api/SPI.h
View File

@ -123,7 +123,7 @@ public:
* @param event The logical OR of events to modify * @param event The logical OR of events to modify
* @return Zero if the transfer has started, or -1 if SPI peripheral is busy * @return Zero if the transfer has started, or -1 if SPI peripheral is busy
*/ */
virtual int transfer(uint8_t *tx_buffer, int tx_length, uint8_t *rx_buffer, int rx_length, const event_callback_t& callback, int event = SPI_EVENT_COMPLETE) { virtual int transfer(const uint8_t *tx_buffer, int tx_length, uint8_t *rx_buffer, int rx_length, const event_callback_t& callback, int event = SPI_EVENT_COMPLETE) {
return transfer(tx_buffer, tx_length, rx_buffer, rx_length, 8, callback, event); return transfer(tx_buffer, tx_length, rx_buffer, rx_length, 8, callback, event);
} }
@ -139,7 +139,7 @@ public:
* @param event The logical OR of events to modify * @param event The logical OR of events to modify
* @return Zero if the transfer has started, or -1 if SPI peripheral is busy * @return Zero if the transfer has started, or -1 if SPI peripheral is busy
*/ */
virtual int transfer(uint16_t *tx_buffer, int tx_length, uint16_t *rx_buffer, int rx_length, const event_callback_t& callback, int event = SPI_EVENT_COMPLETE) { virtual int transfer(const uint16_t *tx_buffer, int tx_length, uint16_t *rx_buffer, int rx_length, const event_callback_t& callback, int event = SPI_EVENT_COMPLETE) {
return transfer(tx_buffer, tx_length, rx_buffer, rx_length, 16, callback, event); return transfer(tx_buffer, tx_length, rx_buffer, rx_length, 16, callback, event);
} }
@ -155,7 +155,7 @@ public:
* @param event The logical OR of events to modify * @param event The logical OR of events to modify
* @return Zero if the transfer has started, or -1 if SPI peripheral is busy * @return Zero if the transfer has started, or -1 if SPI peripheral is busy
*/ */
virtual int transfer(uint32_t *tx_buffer, int tx_length, uint32_t *rx_buffer, int rx_length, const event_callback_t& callback, int event = SPI_EVENT_COMPLETE) { virtual int transfer(const uint32_t *tx_buffer, int tx_length, uint32_t *rx_buffer, int rx_length, const event_callback_t& callback, int event = SPI_EVENT_COMPLETE) {
return transfer((void *)tx_buffer, tx_length, (void *)rx_buffer, rx_length, 32, callback, event); return transfer((void *)tx_buffer, tx_length, (void *)rx_buffer, rx_length, 32, callback, event);
} }
@ -197,7 +197,7 @@ protected:
* @param event The logical OR of events to modify * @param event The logical OR of events to modify
* @return Zero if the transfer has started or was added to the queue, or -1 if SPI peripheral is busy/buffer is full * @return Zero if the transfer has started or was added to the queue, or -1 if SPI peripheral is busy/buffer is full
*/ */
int transfer(void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, unsigned char bit_width, const event_callback_t& callback, int event); int transfer(const void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, unsigned char bit_width, const event_callback_t& callback, int event);
/** /**
* *
@ -212,7 +212,7 @@ protected:
* @param event The logical OR of events to modify * @param event The logical OR of events to modify
* @return Zero if a transfer was added to the queue, or -1 if the queue is full * @return Zero if a transfer was added to the queue, or -1 if the queue is full
*/ */
int queue_transfer(void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, unsigned char bit_width, const event_callback_t& callback, int event); int queue_transfer(const void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, unsigned char bit_width, const event_callback_t& callback, int event);
/** Configures a callback, spi peripheral and initiate a new transfer /** Configures a callback, spi peripheral and initiate a new transfer
* *
@ -226,7 +226,7 @@ protected:
* @param callback The event callback function * @param callback The event callback function
* @param event The logical OR of events to modify * @param event The logical OR of events to modify
*/ */
void start_transfer(void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, unsigned char bit_width, const event_callback_t& callback, int event); void start_transfer(const void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, unsigned char bit_width, const event_callback_t& callback, int event);
#if TRANSACTION_QUEUE_SIZE_SPI #if TRANSACTION_QUEUE_SIZE_SPI

8
libraries/mbed/common/SPI.cpp
View File

@ -68,7 +68,7 @@ int SPI::write(int value) {
#if DEVICE_SPI_ASYNCH #if DEVICE_SPI_ASYNCH
int SPI::transfer(void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, unsigned char bit_width, const event_callback_t& callback, int event) int SPI::transfer(const void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, unsigned char bit_width, const event_callback_t& callback, int event)
{ {
if (spi_active(&_spi)) { if (spi_active(&_spi)) {
return queue_transfer(tx_buffer, tx_length, rx_buffer, rx_length, bit_width, callback, event); return queue_transfer(tx_buffer, tx_length, rx_buffer, rx_length, bit_width, callback, event);
@ -108,12 +108,12 @@ int SPI::set_dma_usage(DMAUsage usage)
return 0; return 0;
} }
int SPI::queue_transfer(void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, unsigned char bit_width, const event_callback_t& callback, int event) int SPI::queue_transfer(const void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, unsigned char bit_width, const event_callback_t& callback, int event)
{ {
#if TRANSACTION_QUEUE_SIZE_SPI #if TRANSACTION_QUEUE_SIZE_SPI
transaction_t t; transaction_t t;
t.tx_buffer = tx_buffer; t.tx_buffer = const_cast<void *>(tx_buffer);
t.tx_length = tx_length; t.tx_length = tx_length;
t.rx_buffer = rx_buffer; t.rx_buffer = rx_buffer;
t.rx_length = rx_length; t.rx_length = rx_length;
@ -132,7 +132,7 @@ int SPI::queue_transfer(void *tx_buffer, int tx_length, void *rx_buffer, int rx_
#endif #endif
} }
void SPI::start_transfer(void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, unsigned char bit_width, const event_callback_t& callback, int event) void SPI::start_transfer(const void *tx_buffer, int tx_length, void *rx_buffer, int rx_length, unsigned char bit_width, const event_callback_t& callback, int event)
{ {
aquire(); aquire();
_callback = callback; _callback = callback;

2
libraries/mbed/hal/spi_api.h
View File

@ -169,7 +169,7 @@ uint8_t spi_get_module(spi_t *obj);
* @param[in] handler SPI interrupt handler * @param[in] handler SPI interrupt handler
* @param[in] hint A suggestion for how to use DMA with this transfer * @param[in] hint A suggestion for how to use DMA with this transfer
*/ */
void spi_master_transfer(spi_t *obj, void *tx, size_t tx_length, void *rx, size_t rx_length, uint8_t bit_width, uint32_t handler, uint32_t event, DMAUsage hint); void spi_master_transfer(spi_t *obj, const void *tx, size_t tx_length, void *rx, size_t rx_length, uint8_t bit_width, uint32_t handler, uint32_t event, DMAUsage hint);
/** The asynchronous IRQ handler /** The asynchronous IRQ handler
* *

14
libraries/mbed/targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/spi_api.c
View File

@ -399,7 +399,7 @@ uint8_t spi_active(spi_t *obj)
} }
} }
void spi_buffer_set(spi_t *obj, void *tx, uint32_t tx_length, void *rx, uint32_t rx_length, uint8_t bit_width) void spi_buffer_set(spi_t *obj, const void *tx, uint32_t tx_length, void *rx, uint32_t rx_length, uint8_t bit_width)
{ {
uint32_t i; uint32_t i;
uint16_t *tx_ptr = (uint16_t *) tx; uint16_t *tx_ptr = (uint16_t *) tx;
@ -407,7 +407,7 @@ void spi_buffer_set(spi_t *obj, void *tx, uint32_t tx_length, void *rx, uint32_t
tx_length *= (bit_width >> 3); tx_length *= (bit_width >> 3);
rx_length *= (bit_width >> 3); rx_length *= (bit_width >> 3);
obj->tx_buff.buffer = tx; obj->tx_buff.buffer = (void *)tx;
obj->rx_buff.buffer = rx; obj->rx_buff.buffer = rx;
obj->tx_buff.length = tx_length; obj->tx_buff.length = tx_length;
obj->rx_buff.length = rx_length; obj->rx_buff.length = rx_length;
@ -761,7 +761,7 @@ static void spi_master_dma_channel_setup(spi_t *obj, void* callback)
* * tx_length: how many bytes will get sent. * * tx_length: how many bytes will get sent.
* * rx_length: how many bytes will get received. If > tx_length, TX will get padded with n lower bits of SPI_FILL_WORD. * * rx_length: how many bytes will get received. If > tx_length, TX will get padded with n lower bits of SPI_FILL_WORD.
******************************************/ ******************************************/
static void spi_activate_dma(spi_t *obj, void* rxdata, void* txdata, int tx_length, int rx_length) static void spi_activate_dma(spi_t *obj, void* rxdata, const void* txdata, int tx_length, int rx_length)
{ {
/* DMA descriptors */ /* DMA descriptors */
DMA_CfgDescr_TypeDef rxDescrCfg; DMA_CfgDescr_TypeDef rxDescrCfg;
@ -822,7 +822,7 @@ static void spi_activate_dma(spi_t *obj, void* rxdata, void* txdata, int tx_leng
true, true,
false, false,
(obj->spi.bits <= 8 ? (void *)&(obj->spi.spi->TXDATA) : (void *)&(obj->spi.spi->TXDOUBLE)), //When frame size > 9, point to TXDOUBLE (obj->spi.bits <= 8 ? (void *)&(obj->spi.spi->TXDATA) : (void *)&(obj->spi.spi->TXDOUBLE)), //When frame size > 9, point to TXDOUBLE
(txdata == 0 ? &fill_word : txdata), // When there is nothing to transmit, point to static fill word (txdata == 0 ? (const void *)&fill_word : txdata), // When there is nothing to transmit, point to static fill word
(obj->spi.bits <= 8 ? tx_length - 1 : (tx_length / 2) - 1)); // When using TXDOUBLE, recalculate transfer length (obj->spi.bits <= 8 ? tx_length - 1 : (tx_length / 2) - 1)); // When using TXDOUBLE, recalculate transfer length
} else { } else {
/* Frame size == 9 */ /* Frame size == 9 */
@ -860,7 +860,7 @@ static void spi_activate_dma(spi_t *obj, void* rxdata, void* txdata, int tx_leng
true, true,
false, false,
(void *)&(obj->spi.spi->TXDATAX), //When frame size > 9, point to TXDOUBLE (void *)&(obj->spi.spi->TXDATAX), //When frame size > 9, point to TXDOUBLE
(txdata == 0 ? &fill_word : txdata), // When there is nothing to transmit, point to static fill word (txdata == 0 ? (const void *)&fill_word : txdata), // When there is nothing to transmit, point to static fill word
(tx_length / 2) - 1); // When using TXDOUBLE, recalculate transfer length (tx_length / 2) - 1); // When using TXDOUBLE, recalculate transfer length
} }
} }
@ -882,7 +882,7 @@ static void spi_activate_dma(spi_t *obj, void* rxdata, void* txdata, int tx_leng
* If the previous transfer has kept the channel, that channel will continue to get used. * If the previous transfer has kept the channel, that channel will continue to get used.
* *
********************************************************************/ ********************************************************************/
void spi_master_transfer_dma(spi_t *obj, void *txdata, void *rxdata, int tx_length, int rx_length, void* cb, DMAUsage hint) void spi_master_transfer_dma(spi_t *obj, const void *txdata, void *rxdata, int tx_length, int rx_length, void* cb, DMAUsage hint)
{ {
/* Init DMA here to include it in the power figure */ /* Init DMA here to include it in the power figure */
dma_init(); dma_init();
@ -930,7 +930,7 @@ void spi_master_transfer_dma(spi_t *obj, void *txdata, void *rxdata, int tx_leng
* @param[in] handler SPI interrupt handler * @param[in] handler SPI interrupt handler
* @param[in] hint A suggestion for how to use DMA with this transfer * @param[in] hint A suggestion for how to use DMA with this transfer
*/ */
void spi_master_transfer(spi_t *obj, void *tx, size_t tx_length, void *rx, size_t rx_length, uint8_t bit_width, uint32_t handler, uint32_t event, DMAUsage hint) void spi_master_transfer(spi_t *obj, const void *tx, size_t tx_length, void *rx, size_t rx_length, uint8_t bit_width, uint32_t handler, uint32_t event, DMAUsage hint)
{ {
if( spi_active(obj) ) return; if( spi_active(obj) ) return;