jzh/rp2040
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[fix] fix flash_download when first byte is not 0x55 in shakehand

Browse Source
This commit is contained in:
zhji 2025-06-14 13:47:40 +08:00
parent 962b2e6e85
commit d4f8b101bd
1 changed files with 6 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
tools/flash_download.py
View File

@ -67,8 +67,8 @@ class FlashDownloader:
# time.sleep(0.5) # 等待500ms # time.sleep(0.5) # 等待500ms
print("Pre-erase signals set") print("Pre-erase signals set")
shakehand = self.ser.read(4) shakehand = self.ser.read(4)
print("shakehand=", shakehand) print("shakehand=", shakehand.hex(' ').upper())
return shakehand == b'\x55\x55\x55\x55' return len(shakehand) == 4 and shakehand[3] == 0x55
def control_signals_post_download(self): def control_signals_post_download(self):
"""下载完成后的信号控制""" """下载完成后的信号控制"""
@ -76,7 +76,7 @@ class FlashDownloader:
self.ser.rts = True # RTS拉低 self.ser.rts = True # RTS拉低
self.ser.dtr = True # DTR拉低 self.ser.dtr = True # DTR拉低
time.sleep(0.1) # 等待100ms time.sleep(0.1) # 等待100ms
self.ser.rts = False # RTS拉高 # self.ser.rts = False # RTS拉高
print("Post-download signals set") print("Post-download signals set")
def calculate_checksum(self, data): def calculate_checksum(self, data):
@ -243,6 +243,9 @@ class FlashDownloader:
print("shake hands failed") print("shake hands failed")
sys.exit(1) sys.exit(1)
# 清除 RX Buffer
self.ser.reset_input_buffer()
# 擦除Flash (擦除足够的空间) # 擦除Flash (擦除足够的空间)
erase_size = ((len(file_data) + 4095) // 4096) * 4096 # 假设擦除块大小为4KB erase_size = ((len(file_data) + 4095) // 4096) * 4096 # 假设擦除块大小为4KB
if not self.erase_flash(self.address, erase_size): if not self.erase_flash(self.address, erase_size):