TM4C123 CANbus Bootloader

Hi QJ,

My bootloader is derived from TivaWare_C_Series-2.1.3.156\examples\boards\dk-tm4c123g\boot_serial.

I have built the boot_serial (using UART5) and this is working well.

I have now configured bl_config.h for CAN. This will not build:-

Description    Resource    Path    Location    Type
#20 identifier "CAN_RX_PIN_PCTL" is undefined    bl_can.c    /AR_PMC_BL_CAN0_v1.00/boot_loader    line 1398    C/C++ Problem
Description    Resource    Path    Location    Type
#20 identifier "CAN_TX_PIN_PCTL" is undefined    bl_can.c    /AR_PMC_BL_CAN0_v1.00/boot_loader    line 1398    C/C++ Problem

Can you provide a link to a working CAN bootloader ?

I assume if I define CAN_UART_BRIDGE, incoming UART packets will be forwarded to the CAN controller (and vice-versa) ?

Regards,

Craig

Hi Sergie,

Yes - I have resolved the issue.

My bootloader uses CAN0.

I have included an extract from my configuration (bl_config.h) below.

Of interest to you are these definitions:

#define CAN_RX_PIN_PCTL 8
#define CAN_TX_PIN_PCTL 8

These values are found in the TM4C123GH6PM datasheet.

//*****************************************************************************
//
// The GPIO module to enable in order to configure the CAN0 Rx pin. This will
// be one of the SYSCTL_RCGC2_GPIOx values, where “x” is replaced with the port
// name (such as B). The value of “x” should match the value of “x” for
// CAN_RX_PORT.
//
// Depends on: CAN_ENABLE_UPDATE
// Exclusive of: None
// Requires: None
//
//*****************************************************************************
#define CAN_RX_PERIPH SYSCTL_RCGC2_GPIOB

//*****************************************************************************
//
// The GPIO port used to configure the CAN0 Rx pin. This will be one of the
// GPIO_PORTx_BASE values, where “x” is replaced with the port name (such as
// B). The value of “x” should match the value of “x” for CAN_RX_PERIPH.
//
// Depends on: CAN_ENABLE_UPDATE
// Exclusive of: None
// Requires: None
//
//*****************************************************************************
#define CAN_RX_PORT GPIO_PORTB_BASE

//*****************************************************************************
//
// The GPIO pin that is shared with the CAN0 Rx pin. This is a value between 0
// and 7.
//
// Depends on: CAN_ENABLE_UPDATE
// Exclusive of: None
// Requires: None
//
//*****************************************************************************
#define CAN_RX_PIN 4

//*****************************************************************************
//
// Selects the port control value for the GPIO corresponding to CAN RX pin
//
// Depends on: CAN_ENABLE_UPDATE
// Exclusive of: None
// Requires: CAN_RX_PIN
//
//*****************************************************************************
#define CAN_RX_PIN_PCTL 8

//*****************************************************************************
//
// The GPIO module to enable in order to configure the CAN0 Tx pin. This will
// be one of the SYSCTL_RCGC2_GPIOx values, where “x” is replaced with the port
// name (such as B). The value of “x” should match the value of “x” for
// CAN_TX_PORT.
//
// Depends on: CAN_ENABLE_UPDATE
// Exclusive of: None
// Requires: None
//
//*****************************************************************************
#define CAN_TX_PERIPH SYSCTL_RCGC2_GPIOB

//*****************************************************************************
//
// The GPIO port used to configure the CAN0 Tx pin. This will be one of the
// GPIO_PORTx_BASE values, where “x” is replaced with the port name (such as
// B). The value of “x” should match the value of “x” for CAN_TX_PERIPH.
//
// Depends on: CAN_ENABLE_UPDATE
// Exclusive of: None
// Requires: None
//
//*****************************************************************************
#define CAN_TX_PORT GPIO_PORTB_BASE

//*****************************************************************************
//
// The GPIO pin that is shared with the CAN0 Tx pin. This is a value between 0
// and 7.
//
// Depends on: CAN_ENABLE_UPDATE
// Exclusive of: None
// Requires: None
//
//*****************************************************************************
#define CAN_TX_PIN 5

//*****************************************************************************
//
// Selects the port control value for the GPIO corresponding to CAN TX pin
//
// Depends on: CAN_ENABLE_UPDATE
// Exclusive of: None
// Requires: CAN_TX_PIN
//
//*****************************************************************************
#define CAN_TX_PIN_PCTL 8

Hope this helps.

Regards,

Craig Anderson.

On 24 April 2017 at 02:03 Sergei Karinov <bounce-4710442@mail.e2e.ti.com> wrote:

 

A Message from the TI E2E™ Community   Sergei Karinov replied to TM4C123 CANbus Bootloader. Hello Craig, Have you been able to resolve the issue? I am having the same problem to configure bootloader to work over CANbus. #20 identifier "CAN_RX_PIN_PCTL" is undefined bl_can.c #20 identifier "CAN_TX_PIN_PCTL" is undefined bl_can.c I cannot find any examples or references that defines this macro. I searched the whole TivaWare source tree looking for this macro. Any hints would be much appreciated.         You received this notification because you subscribed to the forum.  To unsubscribe from only this thread, go here. Flag this post as spam/abuse.

Hi Craig,

Thank you very much for detailed response. It was very helpful.