Shooting : place your code to flash area for flash dialog
operation. And place your code to RAM area for RAM booting dialog
operation.
Shooting : place your code to flash area for flash dialog operation. And place your code to RAM area for RAM booting dialog operation.
Trouble: Failed to enter bootloader mode
Shooting :
Mainly due to wrong hardware connection between easyDSP and your MCU board.
Step 1 : please check if your connection is correct. Hope you find misconnection in this step. Or, move to step 2.
Step 2 : please check the waveforms of easyDSP pins during booting. Also refer to the below sequence of easyDSP pin status.
In case /RESET of easyDSP is NOT directly connected to reset pin of MCU, please check reset pin status of DSP pin directly.
Step 2-1 : please check if BOOT pin is high when /RESET pin is changed from low to high.
In case power monitoring IC (TPSxxxx) is used to generate NRST signal and /RESET is an input to the IC,
it could happen that NRST becomes high after BOOT is low, which will make booting failure.
Step 2-2 : please check RX and TX. After BOOT pin is low, 0x7F (even parity) is sent from PC to MCU via RX.
Bauding bps could be either 115200bps or 57600bps or other value depending of MCU type.
Then MCU send 0x79 (even parity) to PC at the detected bps. With this handshake, bps of each side (easyDSP and MCU) are aligned.
In case you can't observe 0x79 at all, please modify the option byte accordingly.
