TM4C129XNCZAD: bootloader on UART3

Rajesh Varma

Part Number: TM4C129XNCZAD

Tool/software:

I am using the bootloader example of TIVA and working correctly on UART1. Now same i want to modify for the UART3 what changes have to do in blconfig.h .

void Uart3_Boot_init(uint32_t ui32SysClock) {
MAP_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_4 | GPIO_PIN_5); // Set GPIO A6 and as UART pins.

MAP_UARTConfigSetExpClk(UART3_BASE, ui32SysClock, 115200,
(UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE | UART_CONFIG_PAR_NONE));

MAP_IntEnable(INT_UART3);
MAP_UARTIntEnable(UART3_BASE, UART_INT_RX | UART_INT_RT);

write_ptr_uart3 = cir_buffer_uart3;
read_ptr_uart3 = cir_buffer_uart3;
rcv_buff_end_uart3 = &cir_buffer_uart3[UART3_SIZE];

}

7522.bl_config.h

what changes to be do in blconfi

5 months ago

0 Charles Tsai 5 months ago

TI__Guru**** 191886 points

Hi,

I can see in the bl_config.h file that you are specifying UART1, not UART3. Below is a snippet of your bl_config.h related to UART settings. You need to change all #define for UART3.

//*****************************************************************************
//
// Selects the UART as the port for communicating with the boot loader.
//
// Depends on: None
// Exclusive of: CAN_ENABLE_UPDATE, ENET_ENABLE_UPDATE, I2C_ENABLE_UPDATE,
// SSI_ENABLE_UPDATE, USB_ENABLE_UPDATE
// Requires: UART_AUTOBAUD or UART_FIXED_BAUDRATE, UART_CLOCK_ENABLE,
// UARTx_BASE, UART_RXPIN_CLOCK_ENABLE, UART_RXPIN_BASE,
// UART_RXPIN_PCTL, UART_RXPIN_POS, UART_TXPIN_CLOCK_ENABLE,
// UART_TXPIN_BASE, UART_TXPIN_PCTL and UART_TXPIN_POS
//
//*****************************************************************************
#define UART_ENABLE_UPDATE

//*****************************************************************************
//
// Enables automatic baud rate detection. This can be used if the crystal
// frequency is unknown, or if operation at different baud rates is desired.
//
// Depends on: UART_ENABLE_UPDATE
// Exclusive of: UART_FIXED_BAUDRATE
// Requires: None
//
//*****************************************************************************
//#define UART_AUTOBAUD

//*****************************************************************************
//
// Selects the baud rate to be used for the UART.
//
// Depends on: UART_ENABLE_UPDATE, CRYSTAL_FREQ
// Exclusive of: UART_AUTOBAUD
// Requires: None
//
//*****************************************************************************
#define UART_FIXED_BAUDRATE 115200

//*****************************************************************************
//
// Selects the clock enable for the UART peripheral module
//
// Depends on: UART_ENABLE_UPDATE
// Exclusive of: None
// Requires: UARTx_BASE
//
//*****************************************************************************
#define UART_CLOCK_ENABLE SYSCTL_RCGCUART_R1

//*****************************************************************************
//
// Selects the base address of the UART peripheral module
//
// Depends on: UART_ENABLE_UPDATE
// Exclusive of: None
// Requires: UART_CLOCK_ENABLE
//
//*****************************************************************************
#define UARTx_BASE UART1_BASE

//*****************************************************************************
//
// Selects the clock enable for the GPIO corresponding to UART RX pin
//
// Depends on: UART_ENABLE_UPDATE
// Exclusive of: None
// Requires: UART_RXPIN_BASE, UART_RXPIN_PCTL and UART_RXPIN_POS
//
//*****************************************************************************
#define UART_RXPIN_CLOCK_ENABLE SYSCTL_RCGCGPIO_R14

//*****************************************************************************
//
// Selects the base address for the GPIO corresponding to UART RX pin
//
// Depends on: UART_ENABLE_UPDATE
// Exclusive of: None
// Requires: UART_RXPIN_CLOCK_ENABLE, UART_RXPIN_PCTL and UART_RXPIN_POS
//
//*****************************************************************************
#define UART_RXPIN_BASE GPIO_PORTQ_BASE

//*****************************************************************************
//
// Selects the port control value for the GPIO corresponding to UART RX pin
//
// Depends on: UART_ENABLE_UPDATE
// Exclusive of: None
// Requires: UART_RXPIN_CLOCK_ENABLE, UART_RXPIN_BASE and UART_RXPIN_POS
//
//*****************************************************************************
#define UART_RXPIN_PCTL 0x1

//*****************************************************************************
//
// Selects the pin number for the GPIO corresponding to UART RX pin
//
// Depends on: UART_ENABLE_UPDATE
// Exclusive of: None
// Requires: UART_RXPIN_CLOCK_ENABLE, UART_RXPIN_BASE and UART_RXPIN_PCTL
//
//*****************************************************************************
#define UART_RXPIN_POS 4

//*****************************************************************************
//
// Selects the clock enable for the GPIO corresponding to UART TX pin
//
// Depends on: UART_ENABLE_UPDATE
// Exclusive of: None
// Requires: UART_TXPIN_BASE, UART_TXPIN_PCTL and UART_TXPIN_POS
//
//*****************************************************************************
#define UART_TXPIN_CLOCK_ENABLE SYSCTL_RCGCGPIO_R14

//*****************************************************************************
//
// Selects the base address for the GPIO corresponding to UART TX pin
//
// Depends on: UART_ENABLE_UPDATE
// Exclusive of: None
// Requires: UART_TXPIN_CLOCK_ENABLE, UART_TXPIN_PCTL and UART_TXPIN_POS
//
//*****************************************************************************
#define UART_TXPIN_BASE GPIO_PORTQ_BASE

//*****************************************************************************
//
// Selects the port control value for the GPIO corresponding to UART TX pin
//
// Depends on: UART_ENABLE_UPDATE
// Exclusive of: None
// Requires: UART_TXPIN_CLOCK_ENABLE, UART_TXPIN_BASE and UART_TXPIN_POS
//
//*****************************************************************************
#define UART_TXPIN_PCTL 0x1

//*****************************************************************************
//
// Selects the pin number for the GPIO corresponding to UART TX pin
//
// Depends on: UART_ENABLE_UPDATE
// Exclusive of: None
// Requires: UART_TXPIN_CLOCK_ENABLE, UART_TXPIN_BASE and UART_TXPIN_PCTL
//
//*****************************************************************************
#define UART_TXPIN_POS 5

Arm-based microcontrollers

Arm-based microcontrollers forum

TM4C129XNCZAD: bootloader on UART3