I am modifiying the FTM quad decoder example in order to change the quad decoder counter value to a fixed count different to the CNTIN value whenever a condition is given.
As explained in the documentation, whenever I try to modify the CNT value it resets to the CNTIN value, instead of changing to the given value.
I have tryed to overcome this problem changing the CNTIN value to the required value and then clearing the CNT value so it resets to the desired value, but I cannot get CINT value to sync to its new buffered value.
I have checked the documentation to find out how to sync it but I get really lost. I am using MCU Expresso SDK.
Any help will be appreciated.
The code looks something like this:
FTM_GetDefaultConfig(&ftmInfo);
ftmInfo.prescale = kFTM_Prescale_Divide_1;
FTM_Init(QUAD_FTM_BASEADDR, &ftmInfo);
/* Set the modulo values for Quad Decoder. */
FTM_SetQuadDecoderModuloValue(QUAD_FTM_BASEADDR, 0U, DEMO_QUAD_DECODER_MODULO);
/* Enable the Quad Decoder mode. */
phaseParamsConfigStruct.enablePhaseFilter = true;
phaseParamsConfigStruct.phaseFilterVal = 16;
phaseParamsConfigStruct.phasePolarity = kFTM_QuadPhaseNormal;
FTM_SetupQuadDecode(QUAD_FTM_BASEADDR, &phaseParamsConfigStruct, /* Phase A. */
&phaseParamsConfigStruct, /* Phase B. */
kFTM_QuadPhaseEncode);
while (1) {
if (flag) {
FTM_SetQuadDecoderModuloValue(QUAD_FTM_BASEADDR, 300U, DEMO_QUAD_DECODER_MODULO);
FTM_ClearQuadDecoderCounterValue(QUAD_FTM_BASEADDR);
FTM_SetQuadDecoderModuloValue(QUAD_FTM_BASEADDR, 0U, DEMO_QUAD_DECODER_MODULO);
}
}
