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error: initializer element is not constant (void (*)(void))​((uint32_t​)&__STACK_​TOP)

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Alberto Prudhomme
Alberto Prudhomme 2016-4-20
评论： Walter Roberson 2016-5-6
Hello;
I'm using the CCS C code for serial transmit from my Tiva C launchpad.
The C code works fine, but when I pass it to a function block in Simulink by code.ceval, during the debug I receive this error:
:\Users\Alberto\Desktop\startup_ccs.c:71:22: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
(void (*)(void))((uint32_t)&__STACK_TOP),
^
C:\Users\Alberto\Desktop\startup_ccs.c:71:5: error: initializer element is not constant
(void (*)(void))((uint32_t)&__STACK_TOP),
^
C:\Users\Alberto\Desktop\startup_ccs.c:71:5: error: (near initialization for 'g_pfnVectors[0]')
gmake: *** [startup_ccs.obj] Error -1
I can't understand the error, this is my C code of the main:
#include <stdint.h>
#include <stdio.h>
#include <stdbool.h>
#include <math.h>
#include "hw_ints.h"
#include "hw_memmap.h"
#include "debug.h"
#include "fpu.h"
#include "gpio.h"
#include "interrupt.h"
#include "pin_map.h"
#include "rom.h"
#include "sysctl.h"
#include "uart.h"
#define GPIO_PA0_U0RX 0x00000001
#define GPIO_PA1_U0TX 0x00000401
char car[2000];
double u;
void UARTSend2(const uint8_t *pui8Buffer, uint32_t ui32Count);
//*****************************************************************************
// Send a string to the UART.
void UARTSend2(const uint8_t *pui8Buffer, uint32_t ui32Count)
{
while(ui32Count--) // Loop while there are more characters to send.
{
ROM_UARTCharPutNonBlocking(UART0_BASE, *pui8Buffer++); // Write the next character to the UART.
}
}
//*****************************************************************************
// This example demonstrates how to send a string of data to the UART.
int
main(double u)
{
ROM_FPUEnable(); // Enable lazy stacking for interrupt handlers. This allows floating-point
ROM_FPULazyStackingEnable(); // instructions to be used within interrupt handlers, but at the expense of extra stack usage.
ROM_SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN | SYSCTL_XTAL_16MHZ); // Set the clocking to run directly from the crystal.
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF); // Enable the GPIO port that is used for the on-board LED.
ROM_GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_2); // Enable the GPIO pins for the LED (PF2).
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0); // Enable the peripherals used by this example.
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
ROM_IntMasterEnable(); // Enable processor interrupts.
GPIOPinConfigure(GPIO_PA0_U0RX); // Set GPIO A0 and A1 as UART pins.
GPIOPinConfigure(GPIO_PA1_U0TX);
ROM_GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
ROM_UARTConfigSetExpClk(UART0_BASE, ROM_SysCtlClockGet(), 115200, // Configure the UART for 115,200, 8-N-1 operation.
(UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE |
UART_CONFIG_PAR_NONE));
u=1234;
int cont=(log10(u))+6;
sprintf (car,"%.2f\r\n",u);
UARTSend2((uint8_t *) car,cont); // Prompt for text to be entered.
}
And this is the code from the file that receive the error:
...
#pragma DATA_SECTION(g_pfnVectors, ".intvecs")
void (* const g_pfnVectors[])(void) =
{
(void (*)(void))((uint32_t)&__STACK_TOP),
// The initial stack pointer
ResetISR, // The reset handler
NmiSR, // The NMI handler
FaultISR, // The hard fault handler
....
Can you help me to find the solution?
Thanks

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回答（1 个）

Venkatachala Sarma
Hi Alberto,
Could you paste your MALTAB coder in the MATLAB Function block here?

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