TPS65987D: I2C sample code to perform dynamic control

Hi,

We dont have sample code for I2C interaction. You can find pseudo code in https://www.ti.com/lit/an/slvae21a/slvae21a.pdf?ts=1602677995950&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPS65987D 

Thanks

Prajith

Hi Ryuuichi-San,

We do not have sample code for I2C interaction w/ PD controller. I have prepared some guidelines for you, please find it below.

At a high-level, the I2C interaction is based on interrupt events (INT.EVENTx you can find all available events in TRM). PD controller assert IRQn signal when the interrupt event occurs (to alert MCU). MCU shall read interrupt event registers to identify and clear the interrupt event. 

1. Register interrupt

Code snippet for registering VMDReceived (I2C1) interrupts as below:

//Register interrupts

0x16 IntMask1: Interrupt mask bit field corresponding to IntEvent1

 //set bit 11(INT_EVENTx.VDMReceived) in 0x16

uint8_t     indatamask[MAX_BUF_BSIZE] = {0x00, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};

retVal = WriteRegP1(pData->mask_reg, REG_LEN_INTMASK1, &indatamask[0]);

RETURN_ON_ERROR(retVal);  

retVal = WriteRegP2(pData->mask_reg, REG_LEN_INTMASK1, &indatamask[0]);

RETURN_ON_ERROR(retVal);

 2. Identify interrupt event and port by reading 0x14 (I2C1)

0x14 IntEvent1: Interrupt event bit field for I2C_IRQ1 (output is low if any bit in this register is set).

Read interrupt event register 0x14 of both ports to identify interrupt event and interrupt source (Port-0/Port-1)

3. Clear interrupt

//clear interrupts

0x18 IntClear1: Interrupt clear bit field for IntEvent1. Bits set in this register are cleared from IntEvent1

uint8_t     indataclear[MAX_BUF_BSIZE] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};

retVal = WriteRegP1(pData->clear_reg, REG_LEN_INTCLEAR1, &indataclear[0]);

RETURN_ON_ERROR(retVal);

retVal = WriteRegP2(pData->clear_reg, REG_LEN_INTCLEAR1, &indataclear[0]);

RETURN_ON_ERROR(retVal);

This code snippet shows how to clear all interrupts. Similarly, you can selectively clear an interrupt after that particular event occurs. 

Thanks

Prajith

Hi Ryuuichi-San,

Got it. For reboot, you can send GAID command to PD controller. 

Unfortunately, we don't have a document for SRAM access. 

Thanks

Prajith