Hi All, I have bunch of code that we want to put the compiled file in the external flash, in the runtime i want to copy the code to RAM and run it from RAM. Consider that the code is using some variable in the RAM. the code is like this:
extern PROTOCOL_SOLVER PROTOCOL_CAN_SOLVER; //for ccn!!! CAN_FILTERING_ARRAY filter_array = { {0x650},1}; Can_Device m_canDev = {0x750, 0x0, 0xff, 500, &filter_array}; ProtocolProfiler profile1 = { PROTOCOL_CAN, &m_canDev, &PROTOCOL_CAN_SOLVER }; //task development ::::: ProtocolProfiler * m_CurrentProfile = &profile1; float Calculate_Ids_B0(void) { return 0.0f; } taskDiag task_sample[2] = {{1, 3, Calculate_Ids_B0, {{0, {0x10,0x90},2}}, {1}, 0, {""}, {0}}, {1, 3, Calculate_Ids_B0, {{0, {0x10,0x90},2}}, {1}, 0, {""}, {0}}}; ////just for references..... typedef struct _can_devices_ { uint16_t ID_part; uint8_t split_part; uint8_t fill_the_Rest ; uint16_t Delay_BetweenFrm; CAN_FILTERING_ARRAY * filter_array; } Can_Device; typedef struct _frame_bank_ { uint8_t frmBank[270]; uint16_t rec_byte_number; } m_FrmBank; typedef struct _PROTOCOL_SOLVER_ { uint8_t (*ConnectProcedure) (Can_Device * canSpec); uint8_t (*SendAndRecieveFrame) (Can_Device * DevSpec, uint8_t * buffer, uint16_t size_of_buffer, uint8_t bank_frm_num); } PROTOCOL_SOLVER; typedef struct _comm_protocol_profile_ { uint8_t protocol_type; Can_Device * can_spect; PROTOCOL_SOLVER * protocol_solver; } ProtocolProfiler;
I am using LPC1788 and EA-1788 board. I hope someone can help me.
Best Regards, MJM
Doesn't seem meaningful. Did you select a too small processor? Because if you are going to reprogram the chip, then why not do what "everyone else" is doing - have a small boot loader and then replace the full application? It is way more flexible to be able to replace 95% of the code, than to be able to replace 5%.
The speed is really important. the second part is just containing some data and some functions. these two parts are really separated. Just importing some structures and calculating some parameters. because there are about more than 1000 of these configurations.
replacing all code is done for upgrading issue by a boot-loader. But replacing the whole code is really time-consuming.
our IC is LPC1788 with external NAND flash.
"because there are about more than 1000 of these configurations."
You should try to separate code and data.