Fail to load image from External Flash - STM32F429BIT6 / W25Q64 (8MB, 23-bit address)

[hbZhao]

Hello all,

 

I am developing with a STM32F429bit6 by STM32CUBEIDE v1.15.1 and TouchGfx v4.23.2. The LCD display works well. The screen layout is portrait.

However, when I moved the images to the SPI flash (w25q64), the display was crashed.

 

The changes are as below:

• Change the ld file to store the images and fonts:

 

 

• Enable External Data reader

• add spi flash driver and implement the virtual function

 

 

void DataReader_WaitForReceiveDone() {
 return;
}

void DataReader_ReadData(uint32_t address24, uint8_t *buffer, uint32_t length) {
 W25Q_Read(address24, 0, length, buffer);
}

void DataReader_StartDMAReadData(uint32_t address24, uint8_t *buffer, uint32_t length) {
 W25Q_Read(address24, 0, length, buffer);
}

 

 

 

 

[Tesla DeLorean]

Validate the data readable on the STM32 side matches the data on the PC side.

[hbZhao]

Hello Telsa,

 

Thanks for your replay. When I verified the flash by the STM32CubeProgrammer, I got the the data dismatched.

Data mismatch found at address 0x90004400 (byte = 0xF8 instead of 0x8C)

But the data value (0x8C) in the flash is correct.

The below is the verify code in the Loader_Src.c

uint64_t Verify(uint32_t MemoryAddr, uint32_t RAMBufferAddr, uint32_t Size, uint32_t missalignement) {
 __set_PRIMASK(0); // enable interrupts

 uint32_t VerifiedData = 0, InitVal = 0;
 uint64_t checksum;
 Size *= 4;

 uint8_t Buffer[2];
 uint32_t posBuf;

 checksum = CheckSum((uint32_t)MemoryAddr + (missalignement & 0xf), Size - ((missalignement >> 16) & 0xF), InitVal);

 while (Size > VerifiedData) {
 flash_ReadMemory(MemoryAddr + VerifiedData, 2, Buffer);

 posBuf = 0;
 while ((Size > VerifiedData) && (posBuf < 1024)) {
 if (Buffer[posBuf] != *((uint8_t *)RAMBufferAddr + VerifiedData)) {
 __set_PRIMASK(1); // disable interrupts
 return ((checksum << 32) + MemoryAddr + VerifiedData);
 }
 posBuf++;
 VerifiedData++;
 }
 }
 __set_PRIMASK(1); // disable interrupts
 return (checksum << 32);
}

 

 

[Tesla DeLorean]

The suggestion was to validate content at the application level.

[hbZhao]

I have moved the function to an application. And it can run successfully. However, when I tested it as a stldr, it failed to verify with a bigger size file (500K).

The error message is Error: Data mismatch found at address 0x90000A00 (byte = 0xA8 instead of 0x01)

I compared the file with the memory as below. The wrong section address is from 0x9000_0A00 to 0x9005_F5FF.

The first error data is 0x8F5BB4A8, which can be found in the bin file while the address is 0x9006_2800 rather than 0x9000_0A00.

So it seems some blocks data were wrotten to wrong place. Howerver, accroding to the serial port output, there is not error or wrong operations during downloanding. May I know how can fix it? Thanks.

[2024-05-30 16:28:52.269]# RECV ASCII>
Init app...

[2024-05-30 16:29:02.764]# RECV ASCII>
Init app...

[2024-05-30 16:29:02.873]# RECV ASCII>
Write: 90000000(66816)

[2024-05-30 16:29:06.028]# RECV ASCII>
Write: 90010500(66816)

[2024-05-30 16:29:09.162]# RECV ASCII>
Write: 90020A00(66816)

[2024-05-30 16:29:12.328]# RECV ASCII>
Write: 90030F00(66816)

[2024-05-30 16:29:15.469]# RECV ASCII>
Write: 90041400(66816)

[2024-05-30 16:29:18.601]# RECV ASCII>
Write: 90051900(66816)

[2024-05-30 16:29:21.754]# RECV ASCII>
Write: 90061E00(61696)

[2024-05-30 16:29:24.658]# RECV ASCII>
Write: 90070F00(61696)

[2024-05-30 16:29:52.109]# RECV ASCII>
Init app...

[2024-05-30 16:29:52.231]# RECV ASCII>
Read: 90000000(133632)

[2024-05-30 16:29:53.167]# RECV ASCII>
Init app...

[2024-05-30 16:29:53.275]# RECV ASCII>
Read: 90020A00(133632)

[2024-05-30 16:29:54.210]# RECV ASCII>
Init app...

[2024-05-30 16:29:54.320]# RECV ASCII>
Read: 90041400(133632)

[2024-05-30 16:29:55.251]# RECV ASCII>
Init app...

[2024-05-30 16:29:55.390]# RECV ASCII>
Read: 90061E00(123392)