Using CCSv6 with J-Link Support for Stellaris, Tiva, Hercules, and Sitara AM335x, v0.1.0.4 (under Linux) when attempting to debug a EK-TM4C1294XL with a J-Link using debug-in CCS is unable to display the contents of the FPU registers. CCS reports the following errors:
[quote]CORTEX_M4_0: Trouble Reading Register FPU_FPU_S0: No mapped register was found for 1761607744
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S1: No mapped register was found for 1761607745
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S2: No mapped register was found for 1761607746
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S3: No mapped register was found for 1761607747
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S4: No mapped register was found for 1761607748
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S5: No mapped register was found for 1761607749
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S6: No mapped register was found for 1761607750
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S7: No mapped register was found for 1761607751
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S8: No mapped register was found for 1761607752
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S9: No mapped register was found for 1761607753
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S10: No mapped register was found for 1761607754
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S11: No mapped register was found for 1761607755
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S12: No mapped register was found for 1761607756
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S13: No mapped register was found for 1761607757
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S14: No mapped register was found for 1761607758
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S15: No mapped register was found for 1761607759
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S16: No mapped register was found for 1761607760
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S17: No mapped register was found for 1761607761
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S18: No mapped register was found for 1761607762
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S19: No mapped register was found for 1761607763
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S20: No mapped register was found for 1761607764
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S21: No mapped register was found for 1761607765
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S22: No mapped register was found for 1761607766
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S23: No mapped register was found for 1761607767
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S24: No mapped register was found for 1761607768
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S25: No mapped register was found for 1761607769
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S26: No mapped register was found for 1761607770
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S27: No mapped register was found for 1761607771
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S28: No mapped register was found for 1761607772
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S29: No mapped register was found for 1761607773
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S30: No mapped register was found for 1761607774
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S31: No mapped register was found for 1761607775
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S0: No mapped register was found for 1761607744
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S2: No mapped register was found for 1761607746
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S4: No mapped register was found for 1761607748
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S6: No mapped register was found for 1761607750
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S8: No mapped register was found for 1761607752
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S10: No mapped register was found for 1761607754
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S12: No mapped register was found for 1761607756
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S14: No mapped register was found for 1761607758
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S16: No mapped register was found for 1761607760
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S18: No mapped register was found for 1761607762
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S20: No mapped register was found for 1761607764
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S22: No mapped register was found for 1761607766
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S24: No mapped register was found for 1761607768
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S26: No mapped register was found for 1761607770
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S28: No mapped register was found for 1761607772
CORTEX_M4_0: Trouble Reading Register FPU_FPU_S30: No mapped register was found for 1761607774
CORTEX_M4_0: Trouble Reading Register FPU_FPU_FPSCR: No mapped register was found for 1761607713
CORTEX_M4_0: Trouble Reading Register FPU_FPU_FPCCR: No mapped register was found for 1761611572
CORTEX_M4_0: Trouble Reading Register FPU_FPU_FPCAR: No mapped register was found for 1761611576
CORTEX_M4_0: Trouble Reading Register FPU_FPU_FPDSCR: No mapped register was found for 1761611580
CORTEX_M4_0: Trouble Reading Register FPU_FPU_MVFR0: No mapped register was found for 1761611584
CORTEX_M4_0: Trouble Reading Register FPU_FPU_MVFR1: No mapped register was found for 1761611588[/quote]
I think this might be a problem in J-Link Support for Stellaris v0.1.0.4 since:
a) When using the Stellaris ICDI on the EK-TM4C1294XL, CCSv6 is able to display the FPU registers.
b) The SEGGER J-Link Commander V4.84a is able to display the FPU registers.