On Fri, Dec 4, 2015 at 5:09 AM, Stefan Roese sr@denx.de wrote:
Hi Stefano,
On 04.12.2015 12:49, Stefano Babic wrote:
On 04/12/2015 11:51, Fabio Estevam wrote:
Hi Stefano,
On Fri, Dec 4, 2015 at 7:02 AM, Stefano Babic sbabic@denx.de wrote:
Check for bmode before reading the boot device to check if a serial downloader is started, and returns UART if the serial downloader is set, letting SPL to wait for an image if CONFIG_SPL_YMODEM_SUPPORT is set.
This allows to load again a SPL based board with imx_usb_loader together with a tool such as kermit.
Just curious: what were the commands you usned with imx_usb_loader to load SPL + u-boot.img?
I did in this way:
sudo ../imx_usb_loader/imx_usb -v SPL kermit kermit_uboot
And kermit_uboot (a kermit script) contains the lines:
set line /dev/ttyUSB1 set speed 115200 SET CARRIER-WATCH OFF set flow-control none set handshake none set prefixing all set file type bin set protocol ymodem send u-boot.img c
The last "c" command tells kermit (from ckermit package in most distro) to switch from command line mode to communication mode, and when the script is finished, I get U-Boot prompt in the same shell. I tested on a custom board booting from SPI (when internal mode is used), and changing BOOT_MODE to serial, SPL starts automatically a download with y-modem.
Could you please add this description to some imx README in the U-Boot source tree? I'm pretty sure this could be helpful to others as well.
Stefano,
Agreed - this sounds like an excellent thing to document for IMX6 SPL!
Nice work!
Tim