- **status**: new --> closed
- **Resolution**: --> https://review.openocd.org/7419/
---
**[tickets:#375] ti_cjtag.cfg: JTAG scan chain interrogation failed: all ones**
**Status:** closed
**Milestone:** 0.11.0
**Created:** Sat Dec 17, 2022 01:47 PM UTC by Phil Wiggum
**Last Updated:** Sat Jun 10, 2023 05:12 PM UTC
**Owner:** nobody
** 1. Setup **
OpenOCD from git master
FTDI C232HM
Ti CC1310 LaunchPad v1.4
arm-none-eabi
** 2. Wires **
Launchpad all jumpers removed
- FTDI_c232hm --- <-> ----- LaunchPad ------
1 Red(o) 3V3 -> 3V3
2 Orange(o) TCK ->TCK 8 TCK(25)
4 Green(i) TDI<- TDO 4 DIO16_TDO(26)
3 Yellow(o) TDO ->TDI 6 DIO17_TDI(27)
5 Brown(o) TMS -> 10 TMS(24)
10 Black GND -> GND
** 3. Script **
ti_cc13x0_ftdi.ccg:
source [find interface/ftdi/c232hm.cfg]
transport select jtag
adapter speed 200
source [find target/ti_cc13x0.cfg]
** 4. Run **
openocd -f ti_cc13x0_ftdi.ccg
Info : Listening on port 6666 for tcl connections
Info : Listening on port 4444 for telnet connections
Warn : An adapter speed is not selected in the init scripts. OpenOCD will try
to run the adapter at the low speed (100 kHz)
Warn : To remove this warnings and achieve reasonable communication speed with
the target, set "adapter speed" or "jtag_rclk" in the init scripts.
Info : clock speed 100 kHz
Error: JTAG scan chain interrogation failed: all ones
Error: Check JTAG interface, timings, target power, etc.
Error: Trying to use configured scan chain anyway...
Error: cc13x0.jrc: IR capture error; saw 0x3f not 0x01
Warn : Bypassing JTAG setup events due to errors
Info : starting gdb server for cc13x0.cpu on 3333
Info : Listening on port 3333 for gdb connections
** 5. Fix **
file:/usr/share/openocd/scripts/target/ti-cjtag.cfg
proc ti_cjtag_to_4pin_jtag {jrc} {
# Bypass
runtest 20 <------------ Added
irscan $jrc 0x3f -endstate RUN/IDLE
# Two zero bit scans and a one bit drshift
pathmove RUN/IDLE DRSELECT DRCAPTURE DREXIT1 DRPAUSE
pathmove DRPAUSE DREXIT2 DRUPDATE RUN/IDLE
...
Seems like JTag state machin needed some extra clock pulse in the begining.
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