ROMBUSDriver/spi_tx16.s

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2.8 KiB
ArmAsm
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2022-12-18 13:46:39 +00:00
* spi calling convention
* A0 - ROM register
* A1 - readback address
* A2 - RX buffer
* A3 - TX buffer
* A4 - clobbered
* D0 - length (clobbered)
* D1 - nops (clobbered)
.global _spi_hal_tx16
.include "spi_hal_common.s"
.macro _spi_hal_tx16_iteration nops
move.w (%A3)+, %D1
move.b (%A0, %D1.W), %D1
.rept \nops
nop
.endr
.endm
.align 16
_spi_hal_tx16:
spi_call _spi_hal_tx16_lookup, 15
.align 16
_spi_hal_tx16_lookup:
lookup_table _spi_hal_tx16_lookup, _spi_hal_tx16_table_0, 6, 256
lookup_table _spi_hal_tx16_lookup, _spi_hal_tx16_table_1, 8, 256
lookup_table _spi_hal_tx16_lookup, _spi_hal_tx16_table_2, 10, 256
lookup_table _spi_hal_tx16_lookup, _spi_hal_tx16_table_3, 12, 256
lookup_table _spi_hal_tx16_lookup, _spi_hal_tx16_table_4, 14, 256
lookup_table _spi_hal_tx16_lookup, _spi_hal_tx16_table_5, 16, 256
lookup_table _spi_hal_tx16_lookup, _spi_hal_tx16_table_6, 18, 256
lookup_table _spi_hal_tx16_lookup, _spi_hal_tx16_table_7, 20, 256
lookup_table _spi_hal_tx16_lookup, _spi_hal_tx16_table_8, 22, 256
lookup_table _spi_hal_tx16_lookup, _spi_hal_tx16_table_9, 24, 256
lookup_table _spi_hal_tx16_lookup, _spi_hal_tx16_table_10, 26, 256
lookup_table _spi_hal_tx16_lookup, _spi_hal_tx16_table_11, 28, 256
lookup_table _spi_hal_tx16_lookup, _spi_hal_tx16_table_12, 30, 256
lookup_table _spi_hal_tx16_lookup, _spi_hal_tx16_table_13, 32, 256
lookup_table _spi_hal_tx16_lookup, _spi_hal_tx16_table_14, 34, 256
lookup_table _spi_hal_tx16_lookup, _spi_hal_tx16_table_15, 36, 256
.align 16
_spi_hal_tx16_table_0: unroll_table _spi_hal_tx16_iteration, 0, 256
.align 16
_spi_hal_tx16_table_1: unroll_table _spi_hal_tx16_iteration, 1, 256
.align 16
_spi_hal_tx16_table_2: unroll_table _spi_hal_tx16_iteration, 2, 256
.align 16
_spi_hal_tx16_table_3: unroll_table _spi_hal_tx16_iteration, 3, 256
.align 16
_spi_hal_tx16_table_4: unroll_table _spi_hal_tx16_iteration, 4, 256
.align 16
_spi_hal_tx16_table_5: unroll_table _spi_hal_tx16_iteration, 5, 256
.align 16
_spi_hal_tx16_table_6: unroll_table _spi_hal_tx16_iteration, 6, 256
.align 16
_spi_hal_tx16_table_7: unroll_table _spi_hal_tx16_iteration, 7, 256
.align 16
_spi_hal_tx16_table_8: unroll_table _spi_hal_tx16_iteration, 8, 256
.align 16
_spi_hal_tx16_table_9: unroll_table _spi_hal_tx16_iteration, 9, 256
.align 16
_spi_hal_tx16_table_10: unroll_table _spi_hal_tx16_iteration, 10, 256
.align 16
_spi_hal_tx16_table_11: unroll_table _spi_hal_tx16_iteration, 11, 256
.align 16
_spi_hal_tx16_table_12: unroll_table _spi_hal_tx16_iteration, 12, 256
.align 16
_spi_hal_tx16_table_13: unroll_table _spi_hal_tx16_iteration, 13, 256
.align 16
_spi_hal_tx16_table_14: unroll_table _spi_hal_tx16_iteration, 14, 256
.align 16
_spi_hal_tx16_table_15: unroll_table _spi_hal_tx16_iteration, 15, 256