Created
September 6, 2024 18:11
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for use w/ 'glasgow script memory-25x' - little spi flash wearout experiment
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| import time | |
| import statistics | |
| cur_iter = 0 | |
| write_size = 256 | |
| base_addr = 0 | |
| inv = False | |
| erase_times = [] | |
| prog_times = [] | |
| while True: | |
| if inv: | |
| page = (cur_iter ^ 0xffff_ffff_ffff_ffff).to_bytes(8, "little") * (write_size // 8) | |
| else: | |
| page = cur_iter.to_bytes(8, "little") * (write_size // 8) | |
| base_time = time.perf_counter_ns() | |
| await iface.write_enable() | |
| await iface.sector_erase(base_addr) | |
| erase_times.append(time.perf_counter_ns() - base_time) | |
| out = await iface.read(base_addr, len(page)) | |
| if out != bytearray(b'\xff' * len(page)) : | |
| print(f"read {out.hex()} instead of all FF...") | |
| input("waiting...") | |
| base_time = time.perf_counter_ns() | |
| await iface.write_enable() | |
| await iface.page_program(base_addr, page) | |
| prog_times.append(time.perf_counter_ns() - base_time) | |
| if cur_iter % 100 == 0: | |
| avg_prog = statistics.mean(prog_times) | |
| avg_erase= statistics.mean(erase_times) | |
| prog_times = [] | |
| erase_times = [] | |
| print(f"current count: {cur_iter}, erase avg ms: {avg_erase / 1E6 : ,.3f}, prog avg ms: {avg_prog/1E6 : ,.3f}") | |
| out = await iface.read(base_addr, len(page)) | |
| if out != page: | |
| print("wtf? mismatch:\nwrote:\n\t" + page.hex() + "\ngot:\n\t" + out.hex()) | |
| print(f"currently: {cur_iter}") | |
| input("waiting....") | |
| inv = not inv | |
| cur_iter += 1 |
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