39 lines
1.3 KiB
C
39 lines
1.3 KiB
C
/* esp/sar_regs.h
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*
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* ESP8266 register definitions for the "sar" region (0x3FF2xxx)
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*
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* The 0x60000D00 register region is referred to as "sar" by some old header
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* files. Apparently referenced both by ROM I2C functions as well as ADC
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* config/read functions.
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*
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* Not compatible with ESP SDK register access code.
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*/
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#ifndef _ESP_SAR_REGS_H
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#define _ESP_SAR_REGS_H
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#include "esp/types.h"
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#include "common_macros.h"
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#define SAR_BASE 0x60000d00
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// Unfortunately,
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// esp-open-sdk/xtensa-lx106-elf/xtensa-lx106-elf/sysroot/usr/include/xtensa/config/specreg.h
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// already has a "SAR" macro definition which would conflict with this, so
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// we'll use "ESPSAR" instead..
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#define ESPSAR (*(struct SAR_REGS *)(SAR_BASE))
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/* Note: This memory region is not currently well understood. Pretty much all
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* of the definitions here are from reverse-engineering the Espressif SDK code,
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* many are just educated guesses, and almost certainly some are misleading or
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* wrong. If you can improve on any of this, please contribute!
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*/
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struct SAR_REGS {
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uint32_t volatile _unknown0[18]; // 0x00 - 0x44
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uint32_t volatile UNKNOWN_48; // 0x48 : used by sdk_system_restart_in_nmi()
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} __attribute__ (( packed ));
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_Static_assert(sizeof(struct SAR_REGS) == 0x4c, "SAR_REGS is the wrong size");
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#endif /* _ESP_SAR_REGS_H */
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