TMS320F2800157: Setting OTP bootpin and bootmode

John Treubig

Part Number: TMS320F2800157
Other Parts Discussed in Thread: SYSCONFIG

Tool/software:

Hi,

I have an F2800157 Series LaunchPad and I'm confused on how to configure my bootpin/bootmode information in OTP. I know that I will only have to write this once, so I conceive it could be either developing a program or just outputting a HEX file that is loaded once. The HEX file that would just set these values in the OTP would be ideal, as I plan on sending this to my sub to load the part.

I understand from the 280015x Tech Ref I need to change BOOTDEF0 to 0x07 for I2C mode/FLASH and BMSP0 to GPIO32 - 0x32 (from below).

5.4.3.2 One Boot Mode Select Pin

This use case demonstrates a scenario for an application using one boot mode select pin to select between

booting to Flash or using CAN boot.

Program the BOOTPIN_CONFIG location in OTP as follows:

Set BOOTPIN_CONFIG.BMSP0 to a user specified GPIO, such as 0x0 for GPIO0
Set BOOTPIN_CONFIG.BMSP1 to 0xFF
Set BOOTPIN_CONFIG.BMSP2 to 0xFF
Set BOOTPIN_CONFIG.KEY to 0x5A for boot ROM to treat these register bits as valid and use the custom boot table.

Program the BOOTDEF location options for the device. This essentially sets up a device-specific boot mode table. Refer to Section 5.7.8 for valid BOOTDEF values to set in the table.

Set BOOTDEF.BOOTDEF0 to 0x02 for CAN 0x07 I2C booting. This sets CAN boot to boot table index 0.
Set BOOTDEF.BOOTDEF1 to 0x03 for booting to Flash (entry address option 0). This sets Flash boot to boot table index 1.

From below (5.8 & 5.7) and above (5.4.3.2) it would appear that I need to write 0xFF32 to address 0x78008 (Z1-GPREG1), 0x5AFF to address 0x78009 (Z1-GPREG1), and 0xFF37 to address 0x7800C (Z1-GPREG3).

Can you give any hint of how I would accomplish creating the HEX file with CCS 20?

Thanks in advance,

John

2 months ago

0 Matt Kukucka 2 months ago

TI__Genius 11055 points

Hello John,

John Treubig said:
From below (5.8 & 5.7) and above (5.4.3.2) it would appear that I need to write 0xFF32 to address 0x78008 (Z1-GPREG1), 0x5AFF to address 0x78009 (Z1-GPREG1), and 0xFF37 to address 0x7800C (Z1-GPREG3)

As per your requirements:

Write 0x5AFFFF20 to 0x78008 to configure GPIO32 (32 = 0x20) as BMSP0 and disable BMSP1.
- GPIO numbers are encoded in hex, so you have to convert from decimal
Write 0xFFFF0307 to 0x7800C to configure BOOTDEF0=I2C boot option 0 and BOOTDEF1=Flash boot option 0
- Each BOOTDEF# entry has 8-bit width

For programming these configurations, please refer to 5.5 Writing Values in the OTP Using the Flash API Plugin in this user's guide. You can use the Flash API plugin to program the respective OTP locations with your boot configurations. This user's guide is also very useful for understanding the C2000 boot flow.

You can also use the DCSM tool in SysConfig to graphically configure the boot configurations: https://www.ti.com/lit/an/spracp8a/spracp8a.pdf

To generate a hex file, please refer to Chapter 12 in the C28x Assembly Language Tools Guide for output format options: https://www.ti.com/lit/ug/spru513/spru513.pdf. The Hex utility is built into CCS (Project Properties > Build > Tools > C2000 Hex Utility).