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- #include <stddef.h>
- #include <avr/wdt.h>
- #include <avr/interrupt.h>
- #include "xflash_dump.h"
- #ifdef XFLASH_DUMP
- #include "xflash.h"
- bool xfdump_check_state()
- {
- uint32_t magic;
- XFLASH_SPI_ENTER();
- xflash_rd_data(DUMP_OFFSET + offsetof(dump_t, header.magic),
- (uint8_t*)&magic, sizeof(magic));
- return magic == DUMP_MAGIC;
- }
- bool xfdump_check_crash()
- {
- // check_state will call SPI_ENTER for us
- if(!xfdump_check_state())
- return false;
- uint8_t crash;
- xflash_rd_data(DUMP_OFFSET + offsetof(dump_t, header.crash),
- (uint8_t*)&crash, sizeof(crash));
- return crash;
- }
- void xfdump_reset()
- {
- XFLASH_SPI_ENTER();
- xflash_enable_wr();
- xflash_sector_erase(DUMP_OFFSET + offsetof(dump_t, header.magic));
- xflash_wait_busy();
- }
- static void xfdump_erase()
- {
- XFLASH_SPI_ENTER();
- for(uint32_t addr = DUMP_OFFSET;
- addr < DUMP_OFFSET + DUMP_SIZE;
- addr += 4096)
- {
- xflash_enable_wr();
- xflash_sector_erase(DUMP_OFFSET);
- xflash_wait_busy();
- }
- }
- static void xfdump_dump_core(dump_header_t& hdr, uint32_t addr, uint8_t* buf, uint16_t cnt)
- {
- XFLASH_SPI_ENTER();
- // start by clearing all sectors (we need all of them in any case)
- xfdump_erase();
- // write header
- static_assert(sizeof(hdr) < 256, "header is larger than a single page write");
- xflash_enable_wr();
- xflash_page_program(DUMP_OFFSET, (uint8_t*)&hdr, sizeof(hdr));
- xflash_wait_busy();
- // write data
- static_assert(sizeof(dump_t::data) <= RAMEND, "dump area size insufficient");
- xflash_multipage_program(addr, buf, cnt);
- }
- void xfdump_dump()
- {
- dump_header_t buf;
- buf.magic = DUMP_MAGIC;
- buf.regs_present = false;
- buf.crash = false;
- // write sram only
- xfdump_dump_core(buf, DUMP_OFFSET + offsetof(dump_t, data.sram),
- (uint8_t*)RAMSTART, RAMSIZE);
- }
- void xfdump_full_dump_and_reset(bool crash)
- {
- dump_header_t buf;
- buf.magic = DUMP_MAGIC;
- buf.regs_present = true;
- buf.crash = crash;
- // disable interrupts for a cleaner register dump
- cli();
- // write all addressable ranges (this will trash bidirectional registers)
- xfdump_dump_core(buf, DUMP_OFFSET + offsetof(dump_t, data), 0, RAMEND);
- // force a reset soon
- wdt_enable(0);
- while(true);
- }
- #endif
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