topic Problem with using Chip_IAP_ReinvokeISP() function to enable boot loader mode. in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/Problem-with-using-Chip-IAP-ReinvokeISP-function-to-enable-boot/m-p/558014#M15530 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by ayoung on Wed Jun 03 08:11:20 MST 2015</STRONG><BR /><SPAN>I am trying to enable the ISP boot loader from within our application to support software controlled firmware updates.</SPAN><BR /><BR /><SPAN>I have called the Chip_IAP_ReinvokeISP() function and then start the ISP sequence by sending the single character '?' to the chip via the USB-UART bridge in the LPC54102 MCU board.</SPAN><BR /><SPAN>The chip replies with the response "Synchronized\r\n" string.</SPAN><BR /><SPAN>I respond with the by echoing back the "Synchronized\r\n" string and would expect to see this echoed back followed by the string "OK\r\n"</SPAN><BR /><SPAN>However I don't get the echoed response, only a garbled string. After this point no further boot loader commands work.</SPAN><BR /><BR /><SPAN>I have also tested entering the boot loader using the ISP button in combination with the Reset button. In this case the same sequence of boot loader commands works as expected.</SPAN><BR /><BR /><SPAN>Is there any example code available that shows how to enter the boot loader from application code?</SPAN></BODY></HTML> Wed, 15 Jun 2016 19:57:35 GMT lpcware 2016-06-15T19:57:35Z Problem with using Chip_IAP_ReinvokeISP() function to enable boot loader mode. https://community.nxp.com/t5/LPC-Microcontrollers/Problem-with-using-Chip-IAP-ReinvokeISP-function-to-enable-boot/m-p/558014#M15530 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by ayoung on Wed Jun 03 08:11:20 MST 2015</STRONG><BR /><SPAN>I am trying to enable the ISP boot loader from within our application to support software controlled firmware updates.</SPAN><BR /><BR /><SPAN>I have called the Chip_IAP_ReinvokeISP() function and then start the ISP sequence by sending the single character '?' to the chip via the USB-UART bridge in the LPC54102 MCU board.</SPAN><BR /><SPAN>The chip replies with the response "Synchronized\r\n" string.</SPAN><BR /><SPAN>I respond with the by echoing back the "Synchronized\r\n" string and would expect to see this echoed back followed by the string "OK\r\n"</SPAN><BR /><SPAN>However I don't get the echoed response, only a garbled string. After this point no further boot loader commands work.</SPAN><BR /><BR /><SPAN>I have also tested entering the boot loader using the ISP button in combination with the Reset button. In this case the same sequence of boot loader commands works as expected.</SPAN><BR /><BR /><SPAN>Is there any example code available that shows how to enter the boot loader from application code?</SPAN></BODY></HTML> Wed, 15 Jun 2016 19:57:35 GMT https://community.nxp.com/t5/LPC-Microcontrollers/Problem-with-using-Chip-IAP-ReinvokeISP-function-to-enable-boot/m-p/558014#M15530 lpcware 2016-06-15T19:57:35Z