SD Card Assert

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SD Card Assert

428 Views
mspenard603
Contributor IV

Hi Gents,

 I occasionally get the following error when trying to use an SD card after initializing it:

ASSERT ERROR " index <= 7 ": file ".fsl_clock.h" Line "978" function name "CLOCK_ControlGate"

Which references the following:

static inline void CLOCK_ControlGate(clock_ip_name_t name, clock_gate_value_t value)
{
uint32_t index = ((uint32_t)name) >> 8U;
uint32_t shift = ((uint32_t)name) & 0x1FU;
volatile uint32_t *reg;

assert(index <= 7);

reg = ((volatile uint32_t *)&CCM->CCGR0) + index;
*reg = ((*reg) & ~(3U << shift)) | (((uint32_t)value) << shift);
}

But I'm unsure what error this indicates... ??

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4 Replies

417 Views
jeremyzhou
NXP TechSupport
NXP TechSupport

Hi,
Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
I'd like to know more information about the error.
So I was wondering if you can share which version of SDK and EVK board you tested with.
In further, whether you find a way of replicating the error and what the index's value was when trigger the error.
Looking forward to your reply.


Hope it helps.
Have a great day,
TIC

 

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408 Views
mspenard603
Contributor IV

Index at failure:

 

SD Card detected
Card Init
kCLOCK_Pfd0 Freq: 594000000Hz
kCLOCK_Usdhc2Div: 2 +1
ROOT SD_HOST_CLK_FREQ: 198000000Hz
SD BUS CLOCK: 5500000Hz
[SYSTEM ERROR] Mount volume failed:3 0
Retrying mount in 100 ms
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! index: 1
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! index: 1
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! index: 16777215
ASSERT ERROR " index <= 7 ": file ".fsl_clock.h" Line "981" function name "CLOCK_ControlGate"

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399 Views
jeremyzhou
NXP TechSupport
NXP TechSupport

Hi,
Thanks for your reply.
According to your reply, I guess that the issue may be related to the hardware circuit.
I'd like to suggest you try to slow down the SD bus clock, then give it a try again.
Further, I'd like to suggest you use either a logic analyzer or an OSC oscilloscope to visualize the signals during initializing the SD card, it can help us to figure the issue out.
Have a great day,
TIC

 

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411 Views
mspenard603
Contributor IV

Hi Jeremy,

 Thanks for the reply. SDK is 2.5.1 and this is with our own PCB. It happens rarely, maybe 1 out of 100 boots. I'll update the printf() to output the index value.

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