TMS570LC4357: ADC with PWM trigger

Hi Sunil,

I have enabled the PINMUX as well in the IOMM. Any other configuration I'm missing?

Please upload your code for configuring the ADC and the PINMUX registers. Which terminal are you enabling for outputting AD1EXT_ENA?

I'm configuring it using TMDX570LC43HDK "Hercules Safety MCU Development Kit TMS570 MCU" in CCS. I have enabled terminal V8 in IOMM.

In IOMM:

PIN_V8_MULTIPLEX_E PIN_V8; /* PINMMR24[8] to PINMMR24[12] */

typedef enum PIN_V8_MULTIPLEX

{

PIN_V8_MIBSPI3SOMI = 0x01U,

PIN_V8_AD1EXT_ENA = 0x02U,

PIN_V8_ECAP2 = 0x20U,

PIN_V8_DEFAULT = 0x01U

}PIN_V8_MULTIPLEX_E

In adc.c

/* channel selection */

ADC->ADGxCHNSELMODECTRL[1].B.ENH_CHNSEL_MODE_ENABLE = 0x0AU;

ADC->ADGxCHNSELMODECTRL[2].B.ENH_CHNSEL_MODE_ENABLE = 0x0AU;

ADC->ADGxCHNSELMODECTRL[3].B.ENH_CHNSEL_MODE_ENABLE = 0x0AU;

I am triggering ADC1 with PWM signal with a sample sine wave. Can I see the input PWM signal in AD1EXT_ENA ?

Just enabling the V8 pin should be fine for that?

Should I update the Look up table associated with the enhanced channel mode to see output in AD1EXT_ENA?

You cannot see the input sine wave on AD1EXT_ENA. AD1EXT_ENA goes High at the start of the sampling period and stays high during the sampling period.

Please upload a shot of the IOMM registers from the CCS registers window.

IOMM 
 Rev 0x4E840102 Module Revision Register [Memory Mapped] 
 DieId0 0x00000000 Die Id Register 0 [Memory Mapped] 
 DieId1 0x00000000 Die Id Register 1 [Memory Mapped] 
 DieId2 0x00000000 Die Id Register 2 [Memory Mapped] 
 DieId3 0x00000000 Die Id Register 3 [Memory Mapped] 
 DevId0 0x00000000 Device Id Register 0 [Memory Mapped] 
 DevId1 0x00000000 Device Id Register 1 [Memory Mapped] 
 BootConfig0 0x00000001 Boot Config Register 0 [Memory Mapped] 
 Kick0 0x00000000 Kicker Register 0 [Memory Mapped] 
 Kick1 0x00000000 Kicker Register 1 [Memory Mapped] 
 ErrRawStatSet 0x00000000 Error Raw Status/Set Register [Memory Mapped] 
 ErrEnaStatClr 0x00000000 Error Enabled Status/Clear Register [Memory Mapped] 
 ErrEna 0x00000000 Error Enable Register [Memory Mapped] 
 ErrEnaClr 0x00000000 Error Enable Clear Register [Memory Mapped] 
 Fault_Addr 0x00000000 Fault Address Register [Memory Mapped] 
 Fault_Stat 0x00000000 Fault Status Register [Memory Mapped] 
 Fault_Clr 0x00000000 Fault Clear Register [Memory Mapped] 
 PINMMR0 0x01010101 Pin Multiplexing Control Register 0 [Memory Mapped] 
 PINMMR1 0x01010101 Pin Multiplexing Control Register 1 [Memory Mapped] 
 PINMMR2 0x01010101 Pin Multiplexing Control Register 2 [Memory Mapped] 
 PINMMR3 0x01010101 Pin Multiplexing Control Register 3 [Memory Mapped] 
 PINMMR4 0x00010101 Pin Multiplexing Control Register 4 [Memory Mapped] 
 PINMMR5 0x00000000 Pin Multiplexing Control Register 5 [Memory Mapped] 
 PINMMR6 0x00000000 Pin Multiplexing Control Register 6 [Memory Mapped] 
 PINMMR7 0x00000000 Pin Multiplexing Control Register 7 [Memory Mapped] 
 PINMMR8 0x01000000 Pin Multiplexing Control Register 8 [Memory Mapped] 
 PINMMR9 0x01010101 Pin Multiplexing Control Register 9 [Memory Mapped] 
 PINMMR10 0x01010101 Pin Multiplexing Control Register 10 [Memory Mapped] 
 PINMMR11 0x01010101 Pin Multiplexing Control Register 11 [Memory Mapped] 
 PINMMR12 0x01010101 Pin Multiplexing Control Register 12 [Memory Mapped] 
 PINMMR13 0x01010101 Pin Multiplexing Control Register 13 [Memory Mapped] 
 PINMMR14 0x01010101 Pin Multiplexing Control Register 14 [Memory Mapped] 
 PINMMR15 0x01010101 Pin Multiplexing Control Register 15 [Memory Mapped] 
 PINMMR16 0x01010101 Pin Multiplexing Control Register 16 [Memory Mapped] 
 PINMMR17 0x01010101 Pin Multiplexing Control Register 17 [Memory Mapped] 
 PINMMR18 0x01010101 Pin Multiplexing Control Register 18 [Memory Mapped] 
 PINMMR19 0x20200101 Pin Multiplexing Control Register 19 [Memory Mapped] 
 PINMMR20 0x01080801 Pin Multiplexing Control Register 20 [Memory Mapped] 
 PINMMR21 0x08010101 Pin Multiplexing Control Register 21 [Memory Mapped] 
 PINMMR22 0x02012001 Pin Multiplexing Control Register 22 [Memory Mapped] 
 PINMMR23 0x01010101 Pin Multiplexing Control Register 23 [Memory Mapped] 
 PINMMR24 0x01010201 Pin Multiplexing Control Register 24 [Memory Mapped] 
 PINMMR25 0x20010101 Pin Multiplexing Control Register 25 [Memory Mapped] 
 PINMMR26 0x04010101 Pin Multiplexing Control Register 26 [Memory Mapped] 
 PINMMR27 0x10010101 Pin Multiplexing Control Register 27 [Memory Mapped] 
 PINMMR28 0x02020102 Pin Multiplexing Control Register 28 [Memory Mapped] 
 PINMMR29 0x02200202 Pin Multiplexing Control Register 29 [Memory Mapped] 
 PINMMR30 0x01020201 Pin Multiplexing Control Register 30 [Memory Mapped] 
 PINMMR31 0x01202002 Pin Multiplexing Control Register 31 [Memory Mapped] 
 PINMMR32 0x20012001 Pin Multiplexing Control Register 32 [Memory Mapped] 
 PINMMR33 0x01010101 Pin Multiplexing Control Register 33 [Memory Mapped] 
 PINMMR34 0x01010101 Pin Multiplexing Control Register 34 [Memory Mapped] 
 PINMMR35 0x10100101 Pin Multiplexing Control Register 35 [Memory Mapped] 
 PINMMR36 0x01010101 Pin Multiplexing Control Register 36 [Memory Mapped] 
 PINMMR37 0x00001010 Pin Multiplexing Control Register 37 [Memory Mapped] 
 PINMMR80 0x02020201 Pin Multiplexing Control Register 80 [Memory Mapped] 
 PINMMR81 0x01020202 Pin Multiplexing Control Register 81 [Memory Mapped] 
 PINMMR82 0x01010101 Pin Multiplexing Control Register 82 [Memory Mapped] 
 PINMMR83 0x01010101 Pin Multiplexing Control Register 83 [Memory Mapped] 
 PINMMR84 0x01010101 Pin Multiplexing Control Register 84 [Memory Mapped] 
 PINMMR85 0x01010101 Pin Multiplexing Control Register 85 [Memory Mapped] 
 PINMMR86 0x01010101 Pin Multiplexing Control Register 86 [Memory Mapped] 
 PINMMR87 0x01010101 Pin Multiplexing Control Register 87 [Memory Mapped] 
 PINMMR88 0x00010101 Pin Multiplexing Control Register 88 [Memory Mapped] 
 PINMMR89 0x01010000 Pin Multiplexing Control Register 89 [Memory Mapped] 
 PINMMR90 0x01010101 Pin Multiplexing Control Register 90 [Memory Mapped] 
 PINMMR91 0x01010101 Pin Multiplexing Control Register 91 [Memory Mapped] 
 PINMMR92 0x01010101 Pin Multiplexing Control Register 92 [Memory Mapped] 
 PINMMR93 0x01010101 Pin Multiplexing Control Register 93 [Memory Mapped] 
 PINMMR94 0x01010101 Pin Multiplexing Control Register 94 [Memory Mapped] 
 PINMMR95 0x01010101 Pin Multiplexing Control Register 95 [Memory Mapped] 
 PINMMR96 0x01010101 Pin Multiplexing Control Register 96 [Memory Mapped] 
 PINMMR97 0x01010101 Pin Multiplexing Control Register 97 [Memory Mapped] 
 PINMMR98 0x01010101 Pin Multiplexing Control Register 98 [Memory Mapped] 
 PINMMR99 0x00010101 Pin Multiplexing Control Register 99 [Memory Mapped] 
 PINMMR160 0x01010000 Pin Multiplexing Control Register 160 [Memory Mapped] 
 PINMMR161 0x02020202 Pin Multiplexing Control Register 161 [Memory Mapped] 
 PINMMR162 0x02020202 Pin Multiplexing Control Register 162 [Memory Mapped] 
 PINMMR166 0x00000002 Pin Multiplexing Control Register 166 [Memory Mapped] 
 PINMMR167 0x01010101 Pin Multiplexing Control Register 167 [Memory Mapped] 
 PINMMR168 0x00010101 Pin Multiplexing Control Register 168 [Memory Mapped] 
 PINMMR169 0x00000000 Pin Multiplexing Control Register 169 [Memory Mapped] 
 PINMMR170 0x01010000 Pin Multiplexing Control Register 170 [Memory Mapped] 
 PINMMR171 0x01010101 Pin Multiplexing Control Register 171 [Memory Mapped] 
 PINMMR172 0x01010101 Pin Multiplexing Control Register 172 [Memory Mapped] 
 PINMMR173 0x01010101 Pin Multiplexing Control Register 173 [Memory Mapped] 
 PINMMR174 0x01010101 Pin Multiplexing Control Register 174 [Memory Mapped] 
 PINMMR175 0x00000101 Pin Multiplexing Control Register 175 [Memory Mapped] 
 PINMMR176 0x00000000 Pin Multiplexing Control Register 176 [Memory Mapped] 
 PINMMR177 0x00000000 Pin Multiplexing Control Register 177 [Memory Mapped] 
 PINMMR178 0x00000000 Pin Multiplexing Control Register 178 [Memory Mapped] 
 PINMMR179 0x00000000 Pin Multiplexing Control Register 179 [Memory Mapped]