Hi Dave,
I have some points to make sure about your first question.
Is your chip's full name is KE02Z64VQH2? You said you are using 20Mhz external oscillator, did you just calling FLASH_Init() with 20,000,000, and nothing else modified in the sample code?
Did you change the EXT_CLK_FREQ_KHZ to 20000 in the ke02_config.h ? Just like following:
| #define EXT_CLK_FREQ_KHZ 20000 | /* in KHz */ |
This is very important, if you don't do this, I think your core frequece and bus frequence will have some problems.
Because if you still use 10000Khz, your ICS_C1_RDIV(3), it is your RDIV is 256, not 512(ICS_C1_RDIV(4)), then your ICSFLLCLK will be 80Mhz, your FLL clock lock will have problem.
void ICS_SetClkDivider(uint32_t u32ClkFreqKHz)
{
switch(u32ClkFreqKHz)
{
case 8000L:
case 10000L:
/* 8MHz or 10MHz */
ICS->C1 = (ICS->C1 & ~(ICS_C1_RDIV_MASK)) | ICS_C1_RDIV(3); /* now the divided frequency is 8000/256 = 31.25K */
/* now the divided frequency is 10000/256 = 39.0625K */
break;
case 4000L:
/* 4MHz */
ICS->C1 = (ICS->C1 & ~(ICS_C1_RDIV_MASK)) | ICS_C1_RDIV(2); /* now the divided frequency is 4000/128 = 31.25K */
break;
case 16000L:
/* 16MHz */
ICS->C1 = (ICS->C1 & ~(ICS_C1_RDIV_MASK)) | ICS_C1_RDIV(4); /* now the divided frequency is 16000/512 = 31.25K */
break;
case 20000L:
/* 20MHz */
ICS->C1 = (ICS->C1 & ~(ICS_C1_RDIV_MASK)) | ICS_C1_RDIV(4); /* now the divided frequency is 20000/512 = 39.0625K */
break;
case 32L:
/* 32KHz */
ICS->C1 &= ~(ICS_C1_RDIV_MASK);
break;
default:
break;
}
}
you can test your bus clock to make sure whether your clock is correct, from our reference manual, PTH2 is the bus out pin. You can use this pin to test.
Enable the bus out pin ,just add this code :
| SIM->SOPT |=(1<<19); | |
| SIM->SOPT &=0xf8ffff; |
If you don't change the EXT_CLK_FREQ_KHZ to 20000, please change it, and test your eeprom again!
Wish it helps you!
Jingjing
Hi Dave,
Sorry for my later reply because of our weekends.
Your register is correct for your configuration.
Now, we need to check your real bus clock, if you don't have the busout pin, you can use RTCO pin to check your bus clock, just need to add some RTC code, and test a pin wave.
Th is use RTC to test your busclock, if your busclock is 20Mhz, your PTC5 pin will have a 10Khz wave, just like follows:
So, could you please add the code, and test the PTC5 pin's wave, and give it to me?
By the way, you said when you run in real time, your debug will lost, Did you mean just not set breakpoint, and click this button 
If you set break point like following, your debug will still be lost?
Please test your bus clock with RTC at first.
Other questions , I will reply you in your SR.
Waiting for your new test result.
Best Regards,
Jingjing
Hi Dave,
About the debug question, I need to find a 20Mhz crystal and test it, it may have delay, I will reply you as soon as possible.
But use your project, I change the code to 10Mhz, the code works fine.
Now I reply your RTC quesiton at first.
Our configure RTCLKS is 11 bus clock, RTCPS is 110, from the following picture, you get clock divider is 100, then you will get that why output is 10Khz.
This is how I get the 10Khz, and you already get it, now do you understand it?
Wish it helps you!
Best regards.
Jingjing
