User`s manual

Slave Boot Procedures

CS485xxr Hardware User’s Manual

2.3.3 Boot Messages

The Slave Boot procedure uses a number of messages to configure and synchronize the boot process.

Please use the messages listed below when implementing the boot process as a part of the system host

controller firmware.

2.3.3.1 Slave Boot

The SLAVE_BOOT message is used when the system host controller will send each.uld file directly to the

CS485xx. The SLAVE_BOOT message must be issued for each overlay image (.uld file) that is downloaded

to the

CS485xx. Please see Figure 2-2 for more details.

2.3.3.2 Soft Reset

The SOFT_RESET message is the message sent to the CS485xx after all of the overlays have been

successfully booted. The SOFT_RESET leaves execution of the bootloader and begins execution of the

loaded overlays. The overlays can be configured once the SOFT_RESET message has been sent.

2.3.3.3 Messages Read from CS485xx

Table 2-4 defines the boot read messages, in mnemonic and actual hex value, used in CS485xx boot

sequences. Note that there is a unique {ID} for every.uld file.

Table 2-2. SLAVE_BOOT message for CS485xx

MNEMONIC VALUE

SLAVE_BOOT 0x80000000

Table 2-3. SOFT_RESET message for CS485xx

MNEMONIC VALUE

SOFT_RESET 0x40000000

Table 2-4. Boot Read Messages from CS485xx

MNEMONIC VALUE

BOOT_START 0x00000001

BOOT_SUCCESS 0x00000002

APP_START 0x00000004

BOOT_ERROR_CHECKSUM 0x000000FF

INVALID_BOOT_TYPE 0x000000FE

BOOT_FAILURE 0x000000F8

APPLICATION_FAILURE 0xF0{ID}0000