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Forum Post: TMS320F28P550SJ: Can I use FALSH API to program the OTP?

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Tool/software: Hi experts, My customer want to enable JTAGLOCK using their code, that means they want use FLASH API to program the DCSM register in OTP. I make a demo but it unsuccessful. e2e.ti.com/.../flashapi_5F00_128bit_5F00_programming.zip I check the oReturnCheck of flash api and it's statues is success, but the value in OTP is not change. 1. Could you help to check if we can use flash api to enable the JTAGLOCK? This is urgent since if we can't do it, they will change the chip to others. 2. What's more, in CCS, we can use below method to unlock JTAGLOCK, do we have any other method? In customer production line, they don't use CCS, and they use their own master computer. So they want to know how can they integrate unlock JTAGLOCK to their own master computer? BRs Shuqing

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