TI中文支持网Part Number:TMS320F280049COther Parts Discussed in Thread:C2000WARE
最近正在调试CBC功能，写完相关代码后发现CMPSS第一步输出CTRIPH/L就有问题。
重新理了一下相关思路：
电感电流采样为A9，根据Datasheet表，A9是连到CMPSS6的，且HPMXSEL = 3，LPMXSEL = 3（采用内部DAC，HN/LN不配置）
最后使用CTRIPH/L 传递到EPWM X-BAR的TRIP5去触发CBC。
但是现在先不管后面X-BAR 还有TZ模块的cbc配置是否正确，当A9的电压超过设定的DACVALUE时 CTRIPH和CTRIPL电平似乎都没有发生变化。
下面是我相关CMPSS的相关代码，想请TI的工程师看看是否是哪里配置错误了。
#define PFC_CBC_VALUE 7.0f
#define CMPSS_CBC_DACVALUE (PFC_CBC_VALUE / HDL_ADC_DtoReal_IAC)
#define CMPSS_FILTER_PRESCALE 1
#define CMPSS_FILTER_SAMPLE_WINDOW 9
#define CMPSS_FILTER_THRESH 5
#define CMPHP6_MUX CMPX_HP3 // IPFC1
#define CMPLP6_MUX CMPX_LP3 // IPFC1
void HAL_CMPSS_Configure(void)
{
AnalogIO_Init();
CMPSS_HCFG_CBC(CMPSS6_BASE, CMPSS_CBC_DACVALUE + 2048u);
CMPSS_LCFG_CBC(CMPSS6_BASE, 2048u - CMPSS_CBC_DACVALUE);
}
void AnalogIO_Init(void)
{
ASysCtl_selectCMPHPMux(ASYSCTL_CMPHPMUX_SELECT_6, CMPHP6_MUX);
ASysCtl_selectCMPLPMux(ASYSCTL_CMPLPMUX_SELECT_6, CMPLP6_MUX);
}
void CMPSS_HCFG_CBC(uint32_t base,uint16_t DACvalue)
{
CMPSS_enableModule(base);
CMPSS_configHighComparator(base, CMPSS_INSRC_DAC);
// config the filter para
CMPSS_configFilterHigh(base,CMPSS_FILTER_PRESCALE,CMPSS_FILTER_SAMPLE_WINDOW,CMPSS_FILTER_THRESH);
// CTRIP(to EPWM X-BAR) source
CMPSS_configOutputsHigh(base, CMPSS_TRIP_FILTER);
CMPSS_configDAC(base, CMPSS_DACVAL_PWMSYNC | CMPSS_DACREF_VDDA | CMPSS_DACSRC_SHDW);
CMPSS_setDACValueHigh(base, DACvalue);
CMPSS_setHysteresis(base, 0);
CMPSS_disableBlanking(base);
// fifth para 4u: EPWM5
CMPSS_configRamp(base,4000u,1u,1u,4u,1u);
CMPSS_enableLatchResetOnPWMSYNCHigh(base);
CMPSS_clearFilterLatchHigh(base);
}
void CMPSS_LCFG_CBC(uint32_t base,uint16_t DACvalue)
{
CMPSS_enableModule(base);
CMPSS_configLowComparator(base, CMPSS_INSRC_DAC|CMPSS_INV_INVERTED);
CMPSS_configFilterLow(base,CMPSS_FILTER_PRESCALE,CMPSS_FILTER_SAMPLE_WINDOW,CMPSS_FILTER_THRESH);
CMPSS_configOutputsLow(base, CMPSS_TRIP_FILTER);
CMPSS_configDAC(base, CMPSS_DACVAL_PWMSYNC | CMPSS_DACREF_VDDA | CMPSS_DACSRC_SHDW);
CMPSS_setDACValueLow(base, DACvalue);
CMPSS_setHysteresis(base, 0);
CMPSS_disableBlanking(base);
CMPSS_configRamp(base,4000u,1u,1u,4u,1u);
CMPSS_enableLatchResetOnPWMSYNCLow(base);
CMPSS_clearFilterLatchLow(base);
}
对应驱动是EPWM5，所以用RAMP 寄存器那里用的EPWM5SYNCPER，其他几个参数不知道有什么用，看cmpss的工作逻辑图，如果是读取DACxVALS的值，应该和RAMP的大部分值没关系，还有那个迟滞寄存器，暂时好像也没用到。
按照上面的配置，应该可以实现，当A9的AD值大于DACxVALS的值时，输出的CTRIPH/L变为高电平吧。
我在adc中断（20k）里去判断（pwm频率也为20k），相关输出是否有置位，实际DebugVar5变量并未变化（我设的峰值电流7A触发，到快15A了也没看到变化）。
if (CMPSS_getStatus(CMPSS6_BASE) != 0)
{
SvcOBC.SwDebug.DebugVar5++;
}
是我的验证方法不对么？还是配置哪里有问题？
顺便再贴一下X-BAR模块和TZ模块的配置代码
static void HAL_PWM_Configure_XBAR(void)
{
// XBAR_lockEPWM();
// link cmpss CTRIPH/L to EPWM-XBAR TRIP5, then config EPWM TZ module to link trip5 to EPWM
XBAR_setEPWMMuxConfig(XBAR_TRIP5, XBAR_EPWM_MUX10_CMPSS6_CTRIPH);
XBAR_setEPWMMuxConfig(XBAR_TRIP5, XBAR_EPWM_MUX11_CMPSS6_CTRIPL);
// not inverted
XBAR_invertEPWMSignal(XBAR_TRIP5,0);
// enable cbc mux
XBAR_enableEPWMMux(XBAR_TRIP5,XBAR_MUX10|XBAR_MUX11|XBAR_MUX12|XBAR_MUX13);
// need to clear all xbarflags
XBAR_clearInputFlag(XBAR_INPUT_FLG_CMPSS6_CTRIPL);
XBAR_clearInputFlag(XBAR_INPUT_FLG_CMPSS6_CTRIPH);
}
static void HAL_PWM_Configure_DC(void)
{
EPWM_setDigitalCompareEventSource(EPWM5_BASE,EPWM_DC_MODULE_A,EPWM_DC_EVENT_2,EPWM_DC_EVENT_SOURCE_ORIG_SIGNAL);
EPWM_setDigitalCompareEventSyncMode(EPWM5_BASE,EPWM_DC_MODULE_A,EPWM_DC_EVENT_2,EPWM_DC_EVENT_INPUT_SYNCED);
// Trip5: CBC
EPWM_selectDigitalCompareTripInput(EPWM5_BASE,EPWM_DC_TRIP_TRIPIN5,EPWM_DC_TYPE_DCAH);
EPWM_setTripZoneDigitalCompareEventCondition(EPWM5_BASE,EPWM_TZ_DC_OUTPUT_A2,EPWM_TZ_EVENT_DCXH_HIGH);
}
static void HAL_PWM_Configure_TZ(void)
{
EPWM_disableTripZoneAdvAction(EPWM5_BASE);
//
//! Set Trip Zone Action.
//!
EPWM_setTripZoneAction(EPWM5_BASE, EPWM_TZ_ACTION_EVENT_DCAEVT2, EPWM_TZ_ACTION_LOW);
EPWM_selectCycleByCycleTripZoneClearEvent(EPWM5_BASE,EPWM_TZ_CBC_PULSE_CLR_CNTR_ZERO);
EPWM_clearTripZoneFlag(EPWM5_BASE, EPWM_TZ_FLAG_DCAEVT2);
//
//! Enables Trip Zone signal.
//!
EPWM_enableTripZoneSignals(EPWM5_BASE, EPWM_TZ_SIGNAL_DCAEVT2);
}
Yale Li：
C:\ti\c2000\C2000Ware_5_00_00_00\driverlib\f28004x\examples\cmpss
你先看一下CMPSS的例程
