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I2C - costness for tx buffer

pull/1169/head
0xc0170 2015-06-09 09:34:48 +01:00
parent 614c5539bc
commit e7feba4e21
5 changed files with 8 additions and 8 deletions
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2
libraries/mbed/api/I2C.h
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@ -149,7 +149,7 @@ public:
* @param repeated Repeated start, true - do not send stop at end
* @return Zero if the transfer has started, or -1 if I2C peripheral is busy
*/
int transfer(int address, char *tx_buffer, int tx_length, char *rx_buffer, int rx_length, const event_callback_t& callback, int event = I2C_EVENT_TRANSFER_COMPLETE, bool repeated = false);
int transfer(int address, const char *tx_buffer, int tx_length, char *rx_buffer, int rx_length, const event_callback_t& callback, int event = I2C_EVENT_TRANSFER_COMPLETE, bool repeated = false);
/** Abort the on-going I2C transfer
*/

2
libraries/mbed/common/I2C.cpp
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@ -92,7 +92,7 @@ void I2C::stop(void) {
#if DEVICE_I2C_ASYNCH
int I2C::transfer(int address, char *tx_buffer, int tx_length, char *rx_buffer, int rx_length, const event_callback_t& callback, int event, bool repeated)
int I2C::transfer(int address, const char *tx_buffer, int tx_length, char *rx_buffer, int rx_length, const event_callback_t& callback, int event, bool repeated)
{
if (i2c_active(&_i2c)) {
return -1; // transaction ongoing

2
libraries/mbed/hal/i2c_api.h
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@ -191,7 +191,7 @@ void i2c_slave_address(i2c_t *obj, int idx, uint32_t address, uint32_t mask);
* @param handler The I2C IRQ handler to be set
* @param hint DMA hint usage
*/
void i2c_transfer_asynch(i2c_t *obj, void *tx, size_t tx_length, void *rx, size_t rx_length, uint32_t address, uint32_t stop, uint32_t handler, uint32_t event, DMAUsage hint);
void i2c_transfer_asynch(i2c_t *obj, const void *tx, size_t tx_length, void *rx, size_t rx_length, uint32_t address, uint32_t stop, uint32_t handler, uint32_t event, DMAUsage hint);
/** The asynchronous IRQ handler
* @param obj The I2C object which holds the transfer information

6
libraries/mbed/targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/i2c_api.c
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@ -426,7 +426,7 @@ void i2c_slave_address(i2c_t *obj, int idx, uint32_t address, uint32_t mask)
* @param handler The I2C IRQ handler to be set
* @param hint DMA hint usage
*/
void i2c_transfer_asynch(i2c_t *obj, void *tx, size_t tx_length, void *rx, size_t rx_length, uint32_t address, uint32_t stop, uint32_t handler, uint32_t event, DMAUsage hint)
void i2c_transfer_asynch(i2c_t *obj, const void *tx, size_t tx_length, void *rx, size_t rx_length, uint32_t address, uint32_t stop, uint32_t handler, uint32_t event, DMAUsage hint)
{
I2C_TransferReturn_TypeDef retval;
if(i2c_active(obj)) return;
@ -440,7 +440,7 @@ void i2c_transfer_asynch(i2c_t *obj, void *tx, size_t tx_length, void *rx, size_
if((tx_length > 0) && (rx_length == 0)) {
obj->i2c.xfer.flags = I2C_FLAG_WRITE;
//Store buffer info
obj->i2c.xfer.buf[0].data = tx;
obj->i2c.xfer.buf[0].data = (void *)tx;
obj->i2c.xfer.buf[0].len = (uint16_t) tx_length;
} else if ((tx_length == 0) && (rx_length > 0)) {
obj->i2c.xfer.flags = I2C_FLAG_READ;
@ -450,7 +450,7 @@ void i2c_transfer_asynch(i2c_t *obj, void *tx, size_t tx_length, void *rx, size_
} else if ((tx_length > 0) && (rx_length > 0)) {
obj->i2c.xfer.flags = I2C_FLAG_WRITE_READ;
//Store buffer info
obj->i2c.xfer.buf[0].data = tx;
obj->i2c.xfer.buf[0].data = (void *)tx;
obj->i2c.xfer.buf[0].len = (uint16_t) tx_length;
obj->i2c.xfer.buf[1].data = rx;
obj->i2c.xfer.buf[1].len = (uint16_t) rx_length;

4
libraries/mbed/targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/spi_api.c
View File

@ -822,7 +822,7 @@ static void spi_activate_dma(spi_t *obj, void* rxdata, const void* txdata, int t
true,
false,
(obj->spi.bits <= 8 ? (void *)&(obj->spi.spi->TXDATA) : (void *)&(obj->spi.spi->TXDOUBLE)), //When frame size > 9, point to TXDOUBLE
(txdata == 0 ? (const void *)&fill_word : txdata), // When there is nothing to transmit, point to static fill word
(txdata == 0 ? &fill_word : (void *)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
} else {
/* Frame size == 9 */
@ -860,7 +860,7 @@ static void spi_activate_dma(spi_t *obj, void* rxdata, const void* txdata, int t
true,
false,
(void *)&(obj->spi.spi->TXDATAX), //When frame size > 9, point to TXDOUBLE
(txdata == 0 ? (const void *)&fill_word : txdata), // When there is nothing to transmit, point to static fill word
(txdata == 0 ? &fill_word : (void *)txdata), // When there is nothing to transmit, point to static fill word
(tx_length / 2) - 1); // When using TXDOUBLE, recalculate transfer length
}
}