CAN error interrupt 1 in STM32-EEWORLD

Collect

void can_signal(void)

{

unsigned char data can_irq;

unsigned char data temp;

x_wdgtime();

can_irq = InterruptReg;

if(can_irq&ALI_Bit)

{ // Arbitration lost bit

++al_counter;

temp=ArbLostCapReg; // Read arbitration lost register

alc_current=temp&0x1F; // Get the current arbitration lost position

}

if(can_irq & BEI_Bit)

{ // Bus error interrupt

temp=ErrCodeCapReg;

buse_current=temp&0x3F;

temp=temp&0xD0; //Get the type of bus error

switch (temp)

{

case 0x00: ++bite_counter;

case 0x40: ++forme_counter;

case 0x80: ++stuffe_counter;

case 0xd0: ++othere_counter;

}

if(can_irq & EPI_Bit)

{ // Negative error interrupt,

// When the receive or send error count exceeds 127, the error state becomes a passive error

if((RxErrCountReg>127)||(TxErrCountReg>127)) errstatus_current=ERR_PASSIVE;

// When the receive or send error count returns to less than 127, the error status becomes active error

if((RxErrCountReg<127)&&(TxErrCountReg<127)) errstatus_current=ERR_ACTIVE;

}

if(can_irq & DOI_Bit)

{ // data overflow

CommandReg = (CDO_Bit|RRB_Bit);

return;

}

if(can_irq&EI_Bit)

{ // Error alarm interrupt, only bus close error is processed here

if(StatusReg&BS_Bit)

{ // Check the bus status bit of the status register

++busoff_counter;

ModeControlReg = 0x00;

return;

}

if(can_irq & RI_Bit)

{ // Receive data interrupt

if(StatusReg & DOS_Bit)

{

CommandReg = (CDO_Bit|RRB_Bit);

return;

}

can_readmsg();

return;

}

return;

}

Keywords：STM32 CAN Reference address：CAN error interrupt 1 in STM32

Previous article：CAN interrupt 2 in STM32
Next article：STM32 CAN---Error Management Analysis

Recommended ReadingLatest update time:2024-11-16 16:55

Designing precise delay function using STM32's SysTick

When using I2C interface sensors in a project, a more precise delay is required. After searching online, it is possible to do this without using the SysTick timer interrupt. The following information is found: It is mainly modeled after the "Incomplete Manual of STM32" of Atom. The clock of SYSTICK is fixed to 1/8 o

[Microcontroller]

Consequences of not restoring the clock when waking up from STM32 stop mode

For a detailed analysis of STM32's low power consumption, please refer to the interpretation of STM32's low power consumption mode . It is mentioned that when STM32 is in stop mode, the chip's 1.8V area clock is turned off, and the HSI and HSE clocks are also turned off. When an enabled interrupt or event occurs, STM3

[Microcontroller]

LPC1700 CAN communication routine

The microcontroller source program is as follows: /****************************************Copyright (c)**************************************************** ** **--------------File Info--------------------------------------------------------------------------------- ** File name: main.c ** Last modified Da

[Microcontroller]

Pull-up and pull-down resistors for STM32

STM32F10X I/O can enable weak pull-up or pull-down resistors through the configuration register. According to the datasheet, this resistor is: min=20K, typ=30K, max=40K. The input of STM32F10X I/O can be configured as floating/pull up/pull down. For STM32F10X, the state of I/O after system reset is Floating input. S

[Microcontroller]

STM32, system clock setting and chip model library function selection

Model selection: In stm32f10x.h, it involves chip model selection, as shown in the figure: which chip is used, just remove the comment of the chip. For specific chip selection, refer to the comments below the program The frequency setting of the external high-speed clock is also in stm32f10x.h: The subsequent

[Microcontroller]

STM32, system clock setting and chip model library function selection

Summary of STM32 NVIC and interrupts

Preface: 1. To learn STM32 interrupts, you must first understand STM32's definition of priority; 2. Experience in 51 MCU development will make it easier to understand interrupt priorities; 3. This blog post is based on the STM32F103ZET6 chip and 3.5.0 standard library; 4. This blog post starts with registers and e

[Microcontroller]

stm32: firmware library file description

About the firmware library file description File description under the firmware library folder STM32F10x_StdPeriph_Lib_V3.5.0: 1. The main files in the Libraries folder are: 1. core_cm3.c , core_cm3.h : CMSIS core files, through the interface to enter the Cortex_M3 core 2. The startup folder contains the system

[Microcontroller]

Design of high-precision digital pressure transmitter based on CAN bus

0Introduction Pressure sensor is the most commonly used sensor in industrial field, which is widely used in various industrial control environments such as water conservancy and hydropower, railway transportation, intelligent building, production automatic control aerospace, military industry, petrochemical

[Industrial Control]

Popular Resources
Popular amplifiers