Other Parts Discussed in Thread: TMS320F28027
I am trying to write a program in C on the TMS320F28027 Piccolo without using the extra functions and libraries provided in "f2802x_common" to set, clear, enable, disable register values with enumerated types. The program does not execute unless I debug and step through each instruction. I have been able to write a program with the "f2802x_common" libraries and I am able to resume and suspend the CPU just fine during debugging. When I try to go without these extra libraries the program does not seem to flow as I have written it unless I suspend and step through each instruction (step into functions, not over). When I try to execute/resume the code while debugging and then suspend, I get a window showing up saying that there is no source file and the program counter is not in my infinite while loop as expected. I am also not able to call the (*Device_cal) function even when it is defined correctly.
It is mostly default setup for Code Composer Studio v5.3. Debugging in RAM. No library files included in the project. I am using XDS100v2 for debugging.
Am I not understanding something? What am I missing?
Here is program that is not running correctly for me.
#include "F2802x_Device.h"
#define Device_cal (void(*)(void))0x3D7C80
inline void cnfg_setup(void);
inline void gpio_setup(void);
interrupt void epwm1_timer_isr(void)
{
}
int main(void)
{
cnfg_setup();
gpio_setup();
while(1);
}
inline void cnfg_setup(void)
{
// disable Watchdog, interrupts
EALLOW;
SysCtrlRegs.WDCR |= 0x4;
// device calibration
SysCtrlRegs.PCLKCR0.bit.ADCENCLK = 1;
(*Device_cal)();
SysCtrlRegs.PCLKCR0.bit.ADCENCLK = 0;
// set PLL for 60MHz
SysCtrlRegs.PLLSTS.bit.DIVSEL = 0x3;
SysCtrlRegs.PLLCR.bit.DIV = 0xC;
EDIS;
// wait for pll to stabilize
while( SysCtrlRegs.PLLSTS.bit.PLLLOCKS == 0 );
EALLOW;
SysCtrlRegs.PLLSTS.bit.DIVSEL = 0x2;
EDIS;
}
inline void gpio_setup(void)
{
// set GPIO 6,4,2,0,1,16,17,34 to general purpose
EALLOW;
GpioCtrlRegs.GPAMUX1.all &= ~0x0000333F;
GpioCtrlRegs.GPAMUX2.all &= ~0x00000003;
GpioCtrlRegs.GPBMUX1.bit.GPIO34 = 0;
// set pull-up
GpioCtrlRegs.GPAPUD.all &= ~0x00030057;
GpioCtrlRegs.GPBPUD.bit.GPIO34 = 0;
// set ports high
GpioDataRegs.GPACLEAR.all = 0x00030057;
GpioDataRegs.GPBCLEAR.bit.GPIO34 = 1;
// set port direction
GpioCtrlRegs.GPADIR.all |= 0x00030057;
GpioCtrlRegs.GPBDIR.bit.GPIO34 = 1;
EDIS;
}
Thanks,
Kelly
