 H. Peter Anvin
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d6d6390bca
Clean up _start() -- the one in libc doesn't zero bss correctly
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3 years ago |
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H. Peter Anvin
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6b1989fac8
fw: allow gcc to optimize memset, memcpy, and memmove
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3 years ago |
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H. Peter Anvin
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d37791d8a7
fw: faster memset()
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3 years ago |
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H. Peter Anvin
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ec99762a84
Use waitirq rather than suspending a memory transaction for SD card
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3 years ago |
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H. Peter Anvin
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8f74766933
rtc: print the decoded RTC time to the console and update systime
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3 years ago |
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H. Peter Anvin
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56753cd6a3
abcbus: move abcbus to separate module; add I/O status register
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3 years ago |
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H. Peter Anvin
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69476ffdf6
Add I/O interface to the ABC bus, using SDRAM DMA
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3 years ago |
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H. Peter Anvin
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ef652637f0
fw: drop RTC I2C frequency to 100 kHz
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3 years ago |
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H. Peter Anvin
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f6f9bf7ede
Add i2c unit
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3 years ago |
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H. Peter Anvin
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55b0aeee3f
iodev: move one-register "devices" into a common "sys"; add "abc" device
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3 years ago |
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H. Peter Anvin
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e1878a396f
Detect the presence of an ABC-bus by looking for a clock signal
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3 years ago |
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H. Peter Anvin
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c40501f76e
SDRAM access from the ABC-bus
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3 years ago |
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H. Peter Anvin
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3608e21183
Add extended devices (xdevs) that require > 128 bytes
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3 years ago |
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H. Peter Anvin
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f3992b85ad
sdcard: run in slow mode (400 kHz during initialization)
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3 years ago |
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H. Peter Anvin
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4cc5301813
sdcard: generalize the IP, instantiate for ESP32 SPI channel too
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3 years ago |
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H. Peter Anvin
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518503fa99
iodev: centralize definitions and auto-generate boiler plate code
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3 years ago |
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H. Peter Anvin
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bc09800c11
fw: make sure to clear the timer IRQ counter on init...
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3 years ago |
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H. Peter Anvin
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9535001a01
fw: force instructions in irqasm.S to be aligned
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3 years ago |
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H. Peter Anvin
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d3cac913de
fw: prevent invalid linker relaxation in irqasm.S
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3 years ago |
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H. Peter Anvin
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555a856ff4
fw: move .sdata/.sbss into the zero page
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3 years ago |
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H. Peter Anvin
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211ec5e0c8
fw: set gp for the IRQ bank too
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3 years ago |
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H. Peter Anvin
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2efc87efde
Add irqasm.S... still no interrupts, but no crashes either...
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3 years ago |
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H. Peter Anvin
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cd15d8fd49
picorv32: revamp the Q registers to be a full bank switch
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3 years ago |
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H. Peter Anvin
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75980f5efb
fw: now working interrupt handling, periodic timer flashing LEDs
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3 years ago |
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H. Peter Anvin
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2b261e54f6
fw: add interrupt support; use a linker script
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3 years ago |
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H. Peter Anvin
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105317a04c
sdcard: works now! (At least reading)
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3 years ago |
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H. Peter Anvin
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6ead9a1ad1
sdcard: fix switching to high speed mode
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3 years ago |
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H. Peter Anvin
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8a937a6f83
sdcard: now talking to the SD card; driver fixes still needed
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3 years ago |
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H. Peter Anvin
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6a406133f0
Add sdcard and sysclock units; reshuffle address map
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3 years ago |
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H. Peter Anvin
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6b8d647c0a
fw: update SRAM_SIZE to 32K
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3 years ago |
