I would like so me help writing to CH552 data flash. I am able to write and read to/from standard flash memory but when I try to write to 0xC000 to 0xC0FF the CH552 reboots continuously. I tried just reading from 0xC000-0xC0FF without writing and the CH552 still reboots continuously. I have attached a text file showing how I try to write to data flash. This works OK if writing to flash below 16K. Regards, Bert
Bert V. wrote: > I tried just reading from 0xC000-0xC0FF without writing and the CH552 > still reboots continuously. reading the dataflsh does not work with movc, movc > 0x3FFF gives a reset
1 | //flashaccess must be already activated
|
2 | uint8_t ReadDataFlash(uint8_t addr, uint8_t *value) |
3 | {
|
4 | if((value) && (addr < 128)) |
5 | {
|
6 | ROM_ADDR = DATA_FLASH_ADDR | (addr < 1); |
7 | ROM_CTRL = ROM_CMD_READ; |
8 | if(ROM_STATUS & bROM_CMD_ERR) return 0xFE; // cmd error |
9 | *value = ROM_DATA_L; |
10 | return 0; // success |
11 | }
|
12 | return 0xFF; // param error |
13 | }
|
writefunction is similar to the above
there is a typo in my routine: ROM_ADDR = DATA_FLASH_ADDR | (addr << 1); //only even access sorry for that
I figured that out :-) I have been testing the DataFlash with an endurance test. The CH552 user manual states it's good for 10,000 writes. It's still working after over 200,000 write/read cycles.
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