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[opt][uart_download] Support get download baud rate form SIFLI_DOWNLOAD_BAUD_RATE environment variable. #242

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[opt][uart_download] Support get download baud rate form SIFLI_DOWNLOAD_BAUD_RATE environment variable. #242

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76d0b06
[opt][uart_download] Support get download baud rate form `SIFLI_DOWNL…
Apr 17, 2026
9963e0b
[opt][sdk.py] Support get download baud rate form `SIFLI_DOWNLOAD_BAU…
Apr 24, 2026
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12 changes: 10 additions & 2 deletions tools/build/sdk_resource.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1788,6 +1788,14 @@ def BuildJLinkLoadScript(main_env):
generate_uart_download_sh(main_env, device, memory, download_list)
generate_sftool_param(main_env, device, memory, download_file)

def get_baud_rate():
baud_rate = os.getenv("SIFLI_DOWNLOAD_BAUD_RATE", "").strip()
if baud_rate.isdigit():
rate_num = int(baud_rate)
if 115200 <= rate_num <= 3000000:
return f"-b {rate_num}"
return ""


def generate_uart_download_bat(main_env, device, memory, download_list, ImgDownUart_PATH):
uart_comment = '''@echo off
Expand Down Expand Up @@ -1815,7 +1823,7 @@ def generate_uart_download_bat(main_env, device, memory, download_list, ImgDownU
cd %CURR_PATH%
'''.format(ImgDownUart_PATH, main_env['JLINK_DEVICE']))
else:
uart_comment += MakeLine(f"sftool -p COM%input% -c {device} -m {memory.lower()} write_flash {download_list}\n")
uart_comment += MakeLine(f"sftool -p COM%input% {get_baud_rate()} -c {device} -m {memory.lower()} write_flash {download_list}\n")
uart_comment += MakeLine('if "%ENV_ROOT%"=="" pause\n')

uart_f = open(os.path.join(main_env['build_dir'], 'uart_download.bat'), 'w')
Expand Down Expand Up @@ -1893,7 +1901,7 @@ def generate_uart_download_sh(main_env, device, memory,download_list):
if os.getenv("LEGACY_ENV"):
uart_comment += MakeLine('echo "Legacy mode is not supported on Linux/macOS"')
else:
uart_comment += MakeLine(f'sftool -p "$input" -c {device} -m {memory.lower()} write_flash {download_list}\n')
uart_comment += MakeLine(f'sftool -p "$input" {get_baud_rate()} -c {device} -m {memory.lower()} write_flash {download_list}\n')

uart_sh_path = os.path.join(main_env['build_dir'], 'uart_download.sh')
uart_f = open(uart_sh_path, 'w')
Expand Down
10 changes: 9 additions & 1 deletion tools/sdk_py_actions/flash_ext.py
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Original file line number Diff line number Diff line change
Expand Up @@ -169,8 +169,16 @@ def flash_callback(

raise UsageError(f"Unsupported protocol: {protocol}")

def get_baud_rate():
baud_rate = os.getenv("SIFLI_DOWNLOAD_BAUD_RATE", "").strip()
if baud_rate.isdigit():
rate_num = int(baud_rate)
if 115200 <= rate_num <= 3000000:
return rate_num
return 1000000

def register(registry: CommandRegistry) -> None:
baud = get_baud_rate()
registry.command(
path="flash",
callback=flash_callback,
Expand All @@ -192,7 +200,7 @@ def register(registry: CommandRegistry) -> None:
"names": ["-b", "--baud"],
"help": "Baud rate for UART flash.",
"type": int,
"default": 1000000,
"default": baud,
},
{
"names": ["-d", "--device"],
Expand Down