MSP430FR5889: Eddy current sensors order

Adam Kozarzewski

Part Number: MSP430FR5889

I made a PCB for prototype with 3 LC sensors, but I need the reversed order of scanning these sensors. There are two options, I change PCB again or reverse order how the firmware handles them. The reason that I want to reverse order is that interrupt is triggered on positive rotations and when my reading device has normal rotations in reverse direction, then I have to read counters "manually" because these interrupts when whole 1 rotation is done don't occur at all. So I've changed PSM in which I have swapped left with right states everywhere, also I changed TSM table, and the first channel excited is number 1 instead of 0, but still it triggers interrupts in the wrong direction. Does anyone knows what else to change?

over 4 years ago

0 Johnson He over 4 years ago

TI__Mastermind 28496 points

Hi Adam,

Could you tell me more details about hardware & software change?

It will be better if you can provide sch and code changes.

Thanks!

Best Regards

Johnson

0 Adam Kozarzewski over 4 years ago in reply to Johnson He

Prodigy 70 points

What you mean more details? All circuit based on that principle work the same, but here you go some code:

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/ TSM Setting for 3 sensors
    ESITSM0 = 0x0400;     // sync with Aclk
    ESITSM1 = 0x18AD;    // excitation of Ch1 for 1us0x18AD;    // excitation of Ch1 for 1us
    ESITSM2 = 0x0485;    // 1 Aclk delay0x0485;    // 1 Aclk delay
    ESITSM3 = 0x00A5;    // tunable delay0x00A5;    // tunable delay
    ESITSM4 = 0x00A5;    // tunable delay0x00A5;    // tunable delay
    ESITSM5 = 0x00A5;    // tunable delay0x00A5;    // tunable delay
    ESITSM6 = 0x00A5;    // tunable delay0x00A5;    // tunable delay
    ESITSM7 = 0xC9B5;    // DAC on, CA on, for 26 TSM clks0xC9B5;    // DAC on, CA on, for 26 TSM clks
    ESITSM8 = 0x49F5;    // DAC on, Ca on, and latches enable, for 10 TSM clks0x49F5;    // DAC on, Ca on, and latches enable, for 10 TSM clks
    ESITSM9 = 0x0401; // internally shorted for channel 1 LC sensor, for 1 Aclk0x0401; // internally shorted for channel 1 LC sensor, for 1 Aclk
    ESITSM10 = 0x0401; // internally shorted for channel 1 LC sensor, for 1 Aclk0x0401; // internally shorted for channel 1 LC sensor, for 1 Aclk
    ESITSM11 = 0x182C;     // excitation of Ch0 for 1us
    ESITSM12 = 0x0404;     // 1 Aclk delay
    ESITSM13 = 0x0024;     // tunable delay
    ESITSM14 = 0x0024;     // tunable delay
    ESITSM15 = 0x0024;     // tunable delay
    ESITSM16 = 0x0024;     // tunable delay
    ESITSM17 = 0xC934;     // DAC on, CA on, for 26 TSM clks
    ESITSM18 = 0x4974;     // DAC on, Ca on, and latches enable, for 10 TSM clks
    ESITSM19 = 0x0400;  // internally shorted for channel 0 LC sensor, for 1 Aclk
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

/ TSM Setting for 3 sensors
    ESITSM0 = 0x0400;     // sync with Aclk
    ESITSM1 = 0x18AD;    // excitation of Ch1 for 1us0x18AD;    // excitation of Ch1 for 1us
    ESITSM2 = 0x0485;    // 1 Aclk delay0x0485;    // 1 Aclk delay
    ESITSM3 = 0x00A5;    // tunable delay0x00A5;    // tunable delay
    ESITSM4 = 0x00A5;    // tunable delay0x00A5;    // tunable delay
    ESITSM5 = 0x00A5;    // tunable delay0x00A5;    // tunable delay
    ESITSM6 = 0x00A5;    // tunable delay0x00A5;    // tunable delay
    ESITSM7 = 0xC9B5;    // DAC on, CA on, for 26 TSM clks0xC9B5;    // DAC on, CA on, for 26 TSM clks
    ESITSM8 = 0x49F5;    // DAC on, Ca on, and latches enable, for 10 TSM clks0x49F5;    // DAC on, Ca on, and latches enable, for 10 TSM clks
    ESITSM9 = 0x0401; // internally shorted for channel 1 LC sensor, for 1 Aclk0x0401; // internally shorted for channel 1 LC sensor, for 1 Aclk
    ESITSM10 = 0x0401; // internally shorted for channel 1 LC sensor, for 1 Aclk0x0401; // internally shorted for channel 1 LC sensor, for 1 Aclk
    ESITSM11 = 0x182C;     // excitation of Ch0 for 1us
    ESITSM12 = 0x0404;     // 1 Aclk delay
    ESITSM13 = 0x0024;     // tunable delay
    ESITSM14 = 0x0024;     // tunable delay
    ESITSM15 = 0x0024;     // tunable delay
    ESITSM16 = 0x0024;     // tunable delay
    ESITSM17 = 0xC934;     // DAC on, CA on, for 26 TSM clks
    ESITSM18 = 0x4974;     // DAC on, Ca on, and latches enable, for 10 TSM clks
    ESITSM19 = 0x0400;  // internally shorted for channel 0 LC sensor, for 1 Aclk
    ESITSM20 =  0x0400; // internally shorted for channel 0 LC sensor, for 1 Aclk
    ESITSM21 = 0x182E;    // excitation of Ch2 for 1us
    ESITSM22 = 0x0406;    // 1 Aclk delay
    ESITSM23 = 0x0026;    // tunable delay
    ESITSM24 = 0x0026;    // tunable delay
    ESITSM25 = 0x0026;    // tunable delay
    ESITSM26 = 0x0026;    // tunable delay
    ESITSM27 = 0xC936;    // DAC on, CA on, for 26 TSM clks
    ESITSM28 = 0x4976;    // DAC on, Ca on, and latches enable, for 10 TSM clks
    ESITSM29 = 0x0202;    // Stop TSM
//    ESITSM0 = 0x0400;     // sync with Aclk
//    ESITSM1 = 0x182C;     // excitation of Ch0 for 1us
//    ESITSM2 = 0x0404;     // 1 Aclk delay
//    ESITSM3 = 0x0024;     // tunable delay
//    ESITSM4 = 0x0024;     // tunable delay
//    ESITSM5 = 0x0024;     // tunable delay
//    ESITSM6 = 0x0024;     // tunable delay
//    ESITSM7 = 0xC934;     // DAC on, CA on, for 26 TSM clks
//    ESITSM8 = 0x4974;     // DAC on, Ca on, and latches enable, for 10 TSM clks
//    ESITSM9 = 0x0400;  // internally shorted for channel 0 LC sensor, for 1 Aclk
//    ESITSM10 = 0x0400; // internally shorted for channel 0 LC sensor, for 1 Aclk
//    ESITSM11 = 0x18AD;    // excitation of Ch1 for 1us
//    ESITSM12 = 0x0485;    // 1 Aclk delay
//    ESITSM13 = 0x00A5;    // tunable delay
//    ESITSM14 = 0x00A5;    // tunable delay
//    ESITSM15 = 0x00A5;    // tunable delay
//    ESITSM16 = 0x00A5;    // tunable delay
//    ESITSM17 = 0xC9B5;    // DAC on, CA on, for 26 TSM clks
//    ESITSM18 = 0x49F5;    // DAC on, Ca on, and latches enable, for 10 TSM clks
//    ESITSM19 = 0x0401; // internally shorted for channel 1 LC sensor, for 1 Aclk
//    ESITSM20 = 0x0401; // internally shorted for channel 1 LC sensor, for 1 Aclk
//    ESITSM21 = 0x182E;    // excitation of Ch2 for 1us
//    ESITSM22 = 0x0406;    // 1 Aclk delay
//    ESITSM23 = 0x0026;    // tunable delay
//    ESITSM24 = 0x0026;    // tunable delay
//    ESITSM25 = 0x0026;    // tunable delay
//    ESITSM26 = 0x0026;    // tunable delay
//    ESITSM27 = 0xC936;    // DAC on, CA on, for 26 TSM clks
//    ESITSM28 = 0x4976;    // DAC on, Ca on, and latches enable, for 10 TSM clks
//    ESITSM29 = 0x0202;    // Stop TSM


// 3 LC sensors PSM table
const unsigned char Table[] = { 128, 136, 144, 152, 160, 168, 176, 184, 128, 8,
                                144, 92, 160, 42, 176, 184, 128, 136, 16, 26,           //90,44,28
                                160, 168, 116, 184, 128, 10, 84, 24, 160, 168,      //114,12,82
                                176, 184, 128, 136, 144, 152, 32, 108, 50, 184,     //106,52
                                128, 76, 144, 152, 34, 40, 176, 184, 128, 136,      //74,36
                                18, 152, 100, 168, 48, 184, 128, 136, 144, 152,      //20,98
                                160, 168, 176, 184 };
//const unsigned char Table[] = { 128, 136, 144, 152, 160, 168, 176, 184, 128, 8,
//                                144, 90, 160, 44, 176, 184, 128, 136, 16, 28,           //90,44,28
//                                160, 168, 114, 184, 128, 12, 82, 24, 160, 168,      //114,12,82
//                                176, 184, 128, 136, 144, 152, 32, 106, 52, 184,     //106,52
//                                128, 74, 144, 152, 36, 40, 176, 184, 128, 136,      //74,36
//                                20, 152, 98, 168, 48, 184, 128, 136, 144, 152,      //20,98
//                                160, 168, 176, 184 };

The commented part is previous version. Sensors connected to channel 0, 1, 2. The thing is that that it will not tell you anything, you need to know the concept what to change... i even don't know if that is a good approach. I need only information what to change and I'll do it myself.

0 Johnson He over 4 years ago in reply to Adam Kozarzewski

TI__Mastermind 28496 points

Hi Amada,

Got your requirement, I am not the expert of ESI, I will consult some expert and get back soon!

Thanks!

Best Regards

Johnson

0 Adam Kozarzewski over 3 years ago in reply to Johnson He

Prodigy 70 points

you can stop that intense searching, I've changed the board

0 Johnson He over 3 years ago in reply to Adam Kozarzewski

TI__Mastermind 28496 points

Got it.

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MSP430FR5889: Eddy current sensors order