STM32F103 Cann't use SPI3 CLK with Debug Mode.

[Kim Sang Hyouk]

Hello?

I'm use STM32F103 RCT6 SPI3 with EEPROM.

But When I use IAR Debug. can't read or Write. because no have clk

 

Without IAR Debug 

// SPI3 Config /////////////////////////////////////////////////////////////////

void SPI3_Config(void){

 SPI_InitTypeDef SPI_InitStructure;

 GPIO_InitTypeDef GPIO_InitStructure;

 SPI_Cmd(SPI3, DISABLE);

 SPI_I2S_DeInit(SPI3);

  

 RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE);

 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);

 GPIO_PinRemapConfig(GPIO_Remap_SPI3, ENABLE); // STM32F103하고 SPI3로 EEPROM 연결해서 DEBUG시 CLK 신호가 없어서 Remap 해야�?�.

  

 //              SCK     MOSI

 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_5;

 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

 GPIO_Init(GPIOB, &GPIO_InitStructure);

 //              MISO

 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;  

 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;    // GPIO_Mode_IN_FLOATING;

 GPIO_Init(GPIOB, &GPIO_InitStructure); 

  

 //              CS 

 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;

 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;  

 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

 GPIO_Init(GPIOA, &GPIO_InitStructure);

 // SPI configuration -------------------------------------------------------

//KSH SPI_I2S_DeInit(SPI3);

 EEPROM_CS_HIGH();

 SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;

 SPI_InitStructure.SPI_Mode = SPI_Mode_Master;

 SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;

 SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;

 SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;

 SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;

 SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256; //SPI_BaudRatePrescaler_4

 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;

 SPI_InitStructure.SPI_CRCPolynomial = 7;

 SPI_Init(SPI3, &SPI_InitStructure);

 SPI_Cmd(SPI3, ENABLE);

}

How Can I use EEPROM with Debug mode.?

Thank you~

[TDK]

PB3 is the SWO pin (as well as SPI3_SCK). Possible the debugger is messing with this manually. It's possible the IDE has a switch to disable it.

Your schematic is misleading/off. Some pin labels don't line up with what they're connected to on the top and bottom sides.

[Kim Sang Hyouk]

Hello? Thank you your reply.

​  I try remap ....

GPIO_Remap_SWJ_NoJTRST   

GPIO_Remap_SWJ_JTAGDisable 

GPIO_Remap_SPI3       

But Same(debug mode. no have CLK).

:sad_but_relieved_face:

[TDK]

This isn't something you can fix from within your code. As I said, it will be an IDE project/debug setting. It will depend on what specifically you're using to debug the board. I don't use IAR, but I would expect it's somewhere in project settings, or debug configuration settings.

One possible solution:

https://forum.segger.com/index.php/Thread/2203-SOLVED-Disable-SWV-SWO-on-j-link-IAR-EWARM-STM32F4xx/