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AP_HAL_Linux: AnalogIn_Raspilot: rename misleading variables

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We are not doing any dma here, it's just an SPI transaction. Name them
only rx/tx (although io_packet_tx/io_packet_rx could be another option).
This also zero-initialize the struct to keep valgrind happy about not
calling ioctl() with uninitialized variables.
This commit is contained in:
Lucas De Marchi 2016-01-11 15:57:20 -02:00
parent 0cff40ed7b
commit a3cac102cd
1 changed files with 14 additions and 14 deletions
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28
libraries/AP_HAL_Linux/AnalogIn_Raspilot.cpp
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@ -100,26 +100,26 @@ void RaspilotAnalogIn::_update()
return; return;
} }
struct IOPacket _dma_packet_tx, _dma_packet_rx; struct IOPacket tx = { }, rx = { };
uint16_t count = RASPILOT_ADC_MAX_CHANNELS; uint16_t count = RASPILOT_ADC_MAX_CHANNELS;
_dma_packet_tx.count_code = count | PKT_CODE_READ; tx.count_code = count | PKT_CODE_READ;
_dma_packet_tx.page = PX4IO_PAGE_RAW_ADC_INPUT; tx.page = PX4IO_PAGE_RAW_ADC_INPUT;
_dma_packet_tx.offset = 0; tx.offset = 0;
_dma_packet_tx.crc = 0; tx.crc = 0;
_dma_packet_tx.crc = crc_packet(&_dma_packet_tx); tx.crc = crc_packet(&tx);
/* set raspilotio to read reg4 */ /* set raspilotio to read reg4 */
_spi->transaction((uint8_t *)&_dma_packet_tx, (uint8_t *)&_dma_packet_rx, sizeof(_dma_packet_tx)); _spi->transaction((uint8_t *)&tx, (uint8_t *)&rx, sizeof(tx));
hal.scheduler->delay_microseconds(200); hal.scheduler->delay_microseconds(200);
count = 0; count = 0;
_dma_packet_tx.count_code = count | PKT_CODE_READ; tx.count_code = count | PKT_CODE_READ;
_dma_packet_tx.page = 0; tx.page = 0;
_dma_packet_tx.offset = 0; tx.offset = 0;
_dma_packet_tx.crc = 0; tx.crc = 0;
_dma_packet_tx.crc = crc_packet(&_dma_packet_tx); tx.crc = crc_packet(&tx);
/* get reg4 data from raspilotio */ /* get reg4 data from raspilotio */
_spi->transaction((uint8_t *)&_dma_packet_tx, (uint8_t *)&_dma_packet_rx, sizeof(_dma_packet_tx)); _spi->transaction((uint8_t *)&tx, (uint8_t *)&rx, sizeof(tx));
_spi_sem->give(); _spi_sem->give();
@ -128,7 +128,7 @@ void RaspilotAnalogIn::_update()
AnalogSource_Raspilot *source = _channels[j]; AnalogSource_Raspilot *source = _channels[j];
if (source != NULL && i == source->_pin) { if (source != NULL && i == source->_pin) {
source->_value = _dma_packet_rx.regs[i] * 3.3 / 4096.0; source->_value = rx.regs[i] * 3.3 / 4096.0;
} }
} }
} }