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ed6a4a4769
* trailing space removal Co-authored-by: Petr Ledvina <ledvinap@gmail.com> * deduplicate empty lines --------- Co-authored-by: Petr Ledvina <ledvinap@gmail.com> Co-authored-by: Mark Haslinghuis <mark@numloq.nl>
127 lines
4.9 KiB
C
127 lines
4.9 KiB
C
/*
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* This file is part of Cleanflight and Betaflight.
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*
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* Cleanflight and Betaflight are free software. You can redistribute
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* this software and/or modify this software under the terms of the
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* GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option)
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* any later version.
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*
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* Cleanflight and Betaflight are distributed in the hope that they
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software.
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*
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "drivers/io_types.h"
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/*** ARCITIMER ***/
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#define TRANSPONDER_BITS_PER_BYTE_ARCITIMER 8
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#define TRANSPONDER_DATA_LENGTH_ARCITIMER 9
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#define TRANSPONDER_TOGGLES_PER_BIT_ARCITIMER 4
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#define TRANSPONDER_GAP_TOGGLES_ARCITIMER 0
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#define TRANSPONDER_TOGGLES_ARCITIMER (TRANSPONDER_TOGGLES_PER_BIT_ARCITIMER + TRANSPONDER_GAP_TOGGLES_ARCITIMER)
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#define TRANSPONDER_DMA_BUFFER_SIZE_ARCITIMER 155 * TRANSPONDER_TOGGLES_PER_BIT_ARCITIMER // 620
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#define TRANSPONDER_TIMER_MHZ_ARCITIMER 24
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#define TRANSPONDER_CARRIER_HZ_ARCITIMER 41886
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#define TRANSPONDER_TRANSMIT_DELAY_ARCITIMER 4500
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#define TRANSPONDER_TRANSMIT_JITTER_ARCITIMER 10000
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/*** ******** ***/
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/*** ILAP ***/
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#define TRANSPONDER_BITS_PER_BYTE_ILAP 10 // start + 8 data + stop
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#define TRANSPONDER_DATA_LENGTH_ILAP 6
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#define TRANSPONDER_TOGGLES_PER_BIT_ILAP 11
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#define TRANSPONDER_GAP_TOGGLES_ILAP 1
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#define TRANSPONDER_TOGGLES_ILAP (TRANSPONDER_TOGGLES_PER_BIT_ILAP + TRANSPONDER_GAP_TOGGLES_ILAP)
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#define TRANSPONDER_DMA_BUFFER_SIZE_ILAP ((TRANSPONDER_TOGGLES_PER_BIT_ILAP + 1) * TRANSPONDER_BITS_PER_BYTE_ILAP * TRANSPONDER_DATA_LENGTH_ILAP) //720
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#define TRANSPONDER_TIMER_MHZ_ILAP 24
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#define TRANSPONDER_CARRIER_HZ_ILAP 460750
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#define TRANSPONDER_TRANSMIT_DELAY_ILAP 4500
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#define TRANSPONDER_TRANSMIT_JITTER_ILAP 10000
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/*** ******** ***/
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/*** ERLT ***/
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#define TRANSPONDER_DATA_LENGTH_ERLT 1
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#define ERLTBitQuiet 0
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#define ERLTCyclesForOneBit 25
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#define ERLTCyclesForZeroBit 10
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#define TRANSPONDER_DMA_BUFFER_SIZE_ERLT 200 // actually ERLT is variable length 91-196 depending on the ERLT id
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#define TRANSPONDER_TIMER_MHZ_ERLT 18
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#define TRANSPONDER_CARRIER_HZ_ERLT 38000
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#define TRANSPONDER_TRANSMIT_DELAY_ERLT 22500
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#define TRANSPONDER_TRANSMIT_JITTER_ERLT 5000
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/*** ******** ***/
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/*
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* Implementation note:
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* Using around over 700 bytes for a transponder DMA buffer is a little excessive, likely an alternative implementation that uses a fast
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* ISR to generate the output signal dynamically based on state would be more memory efficient and would likely be more appropriate for
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* other targets. However this approach requires very little CPU time and is just fire-and-forget.
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*/
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#if defined(UNIT_TEST)
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typedef union transponderIrDMABuffer_s {
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uint8_t arcitimer[TRANSPONDER_DMA_BUFFER_SIZE_ARCITIMER]; // 620
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uint8_t ilap[TRANSPONDER_DMA_BUFFER_SIZE_ILAP]; // 720
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uint8_t erlt[TRANSPONDER_DMA_BUFFER_SIZE_ERLT]; // 91-200
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} transponderIrDMABuffer_t;
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#elif defined(STM32F4) || defined(STM32F7) || defined(STM32H7) || defined(STM32G4) || defined(APM32F4)
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typedef union transponderIrDMABuffer_s {
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uint32_t arcitimer[TRANSPONDER_DMA_BUFFER_SIZE_ARCITIMER]; // 620
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uint32_t ilap[TRANSPONDER_DMA_BUFFER_SIZE_ILAP]; // 720
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uint32_t erlt[TRANSPONDER_DMA_BUFFER_SIZE_ERLT]; // 91-200
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} transponderIrDMABuffer_t;
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#endif
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typedef struct transponder_s {
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uint8_t gap_toggles;
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uint32_t timer_hz;
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uint32_t timer_carrier_hz;
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uint16_t bitToggleOne;
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uint32_t dma_buffer_size;
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#if defined(STM32F4)|| defined(STM32F7) || defined(STM32H7) || defined(STM32G4) || defined(APM32F4) || defined(UNIT_TEST)
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transponderIrDMABuffer_t transponderIrDMABuffer;
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#endif
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const struct transponderVTable *vTable;
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} transponder_t;
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typedef enum {
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TRANSPONDER_NONE = 0,
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TRANSPONDER_ILAP,
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TRANSPONDER_ARCITIMER,
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TRANSPONDER_ERLT
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} transponderProvider_e;
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#define TRANSPONDER_PROVIDER_COUNT 3
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struct transponderVTable {
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void (*updateTransponderDMABuffer)(transponder_t *transponder, const uint8_t* transponderData);
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};
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bool transponderIrInit(const ioTag_t ioTag, const transponderProvider_e provider);
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void transponderIrDisable(void);
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void transponderIrHardwareInit(ioTag_t ioTag, transponder_t *transponder);
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void transponderIrDMAEnable(transponder_t *transponder);
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void transponderIrWaitForTransmitComplete(void);
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void transponderIrUpdateData(const uint8_t* transponderData);
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void transponderIrTransmit(void);
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bool isTransponderIrReady(void);
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extern volatile uint8_t transponderIrDataTransferInProgress;
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