a problem of str712 dataflash

[lchu76]

Posted on November 28, 2005 at 04:26

a problem of str712 dataflash

[lchu76]

Posted on November 23, 2005 at 00:13

FLASH_WritePrConfig (FLASH_B1F0,DISABLE);

if execute this line,result is: program crash. why?

when cpu reset , the register 0x4010dfb0=0xfcfcff00,but in datasheet indicate ''Address offset: 0x10 DFB0h

Delivery value: 0xFFFF FFFF

Bit 31:18 Reserved, must be kept at reset value (1).''

I don't known whats means.

[hichem2]

Posted on November 23, 2005 at 04:48

Hi,

Normally there is no problem in your configuration.

Can you tell me which frequency is used for the CPU.

Cheers,

Hich

[lchu76]

Posted on November 23, 2005 at 05:09

48MHz

my rccu config:

''

RCCU_Div2Config(ENABLE);

RCCU_PLL1Config(RCCU_PLL1_Mul_12,RCCU_Div_2);

RCCU_RCLKSourceConfig(RCCU_PLL1_Output);

RCCU_MCLKConfig(RCCU_DEFAULT); //48M

RCCU_FCLKConfig(RCCU_RCLK_2); //24M for PCLK1

RCCU_PCLKConfig(RCCU_RCLK_4); //12M for PCLK2

''

[hichem2]

Posted on November 23, 2005 at 06:19

Hi,

As the STR71x datasheet the Executing from Flash with RWW is limited with a CPU frequency up to 45 MHz.

I hope that this can help you to resolve the problem.

Cheers,

Hich

[lchu76]

Posted on November 23, 2005 at 10:57

I think the CPU frequency not main problem; I use example from ST lib,the operation was success,but when I add a line '' for(i=0;i

I need a real utility example.

[hichem2]

Posted on November 24, 2005 at 05:34

Hi chu,

You find attached an example which excute your previous descreption and it work perfectly.

Cheers,

Hich

________________

Attachments :

flash_example.zip : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006HtAC&d=%2Fa%2F0X0000000aJm%2Fc5bGSoMZ17wttjHClQqIGwOpaZ42atUcy9ExWhMQhO0&asPdf=false

[lchu76]

Posted on November 24, 2005 at 21:59

hi hich,

I tested your example ,run ok;but after I modify it,please see Attachments ''p1.jpg'', the program can not run normally, stil failure. run this program,if I run step ,all line can executed;or if I set a breakpoint at line 34,all line can executed,but may write not success.

Please test , I need your help.

________________

Attachments :

p1.JPG : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006HtAH&d=%2Fa%2F0X0000000aJn%2FIgBpYqEjz1WsYX6KsyiLuScsmfMugzXDRZjiFhagSrU&asPdf=false

[anis2]

Posted on November 28, 2005 at 04:26

Hi,

Try to initialize the flash by adding the following function before programming the flash:

FLASH_Init();