FreeCalypso > hg > fc-tourmaline

annotate src/cs/system/main/gcc/vectors.S @ 261:841a848ba762

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SPI SWE: clear any pending boot-time interrupts in spi_init() Charger plug/unplug hw logic in the Iota ABB has no built-in debouncing, thus electrical contact bounce on the charging power connection interface produces a lot of charger plug/unplug interrupts. When we boot in charging mode (charging power present at boot time and is presumably the cause of Switch-ON), some bounce may occur between the initial Iota Switch-ON action and Calypso firmware booting. By clearing any accumulated ITSTATREG interrupts on boot, we prevent these pre-boot interrupts from generating charger plug/unplug events to FCHG, which would upset smooth from-boot charging.
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 14 May 2021 02:49:05 +0000
parents 4e78acac3d88
children
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4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
Mychaela Falconia <falcon@freecalypso.org>
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2 * These 7 branch instructions, corresponding to ARM exception and interrupt
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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3 * vectors, will be placed in different sections depending on the flashImage
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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4 * vs. ramImage configuration and which target we build for; this little
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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5 * snippet file will be #included where it is needed.
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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6 */
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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8 b _arm_undefined
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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9 b _arm_swi
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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10 b _arm_abort_prefetch
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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11 b _arm_abort_data
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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12 b _arm_reserved
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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13 b _INT_IRQ
4e78acac3d88 src/{condat,cs,gpf,nucleus}: import from Selenite
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14 b _INT_FIQ