PWMSP002_GetTimerRegsVal App returns incorrect TimerReg if 2 timers are concatenated

[#1]

Hi All,

It seems the "PWMSP002_GetTimerRegsVal" App returns an incorrect TimerReg value if 2 timers are concatenated.

For example, the code below sets the timer to 0x1FFFF and reads the TimerReg value back incorrectly as 0xFFFF, the high 16 bits are missing.

Status = PWMSP002_SetTimerVal(&PWMSP002_Handle2, 0x1FFFF);
Status = PWMSP002_GetTimerRegsVal((PWMSP002_HandleType*)&PWMSP002_Handle2, &TimerVal);

Any comments or suggestions would be welcome.

Best regards
Aaron

[#2]

Hi Aaron,

CCU8PWMLIB_SetTimerVal() function sets the timer value by writing to TIMER register 16bit TVAL field (CC8yTIMER.TVAL[15:0]). Whereas, CCU8PWMLIB_GetTimerRegsVal() function reads the period (CC8yPRS) & compare (CC8yCR1/2S) register values.

BR,
Zain

[#3]

Hi Zain,


Thanks for the info. According to the help the "PWMSP002_GetTimerRegsVal()" function returns a pointer to the "PWMSP002_TimerRegsType" structure which contains the following...


uint32_t CompReg1
uint32_t CompReg2
uint32_t PeriodReg
uint32_t TimerReg

When I have 2 concatenated timer slices the "TimerReg" only contains bits 15:0 which doesn't seem right.

BR
Aaron

[#4]

The attached zip file contains a PMWSP002 project which demonstrates the problem.

The CCU80 period value is 0x3B71F in concatenated registers CCU80_CC81.PR and CCU80_CC80.PR.

You can run the project in debug and set different values for the 'Preset' variable which is loaded into CCU80_CC81.TIMER and CCU80_CC80.TIMER by the function "PWMSP002_SetTimerVal(&PWMSP002_Handle0, Preset)".

After starting the timer the 'While' loop incremets the 'Iterations' variable until the CCU80_CC81.TIMER register is >= 0x2. In other words until CCU80 reaches a count of 0x20000.

If 'Preset' is loaded with a value <= to the CCU80_CC80.PR register value (0xB71F) then the CCU80 timer works OK and the number of iterations seems correct.

If 'Preset' is loaded with a value > the the CCU80_CC80.PR register value (0xB71F) then the CCU80 timer is not OK and the number of iterations seems wrong.

e.g.

Preset = 0x00000, Iterations == 400036. OK

Preset = 0x20000, Iterations == 0. OK

Preset = 0xB71F, Iterations == 200021. OK

Preset = 0xB720, Iterations == 479636. Not OK

Preset = 0x1FFFF, Iterations == 200021. Not OK. You would definitely expect the While loop to finish immediately.


Any suggestions would be appreciated.

Best regards
Aaron