topic Re: i2c data not transmitting properly on s32k144 in S32K

i2c data not transmitting properly on s32k144

bhanu_p — Mon, 02 Sep 2024 10:34:17 GMT

Hi,
Im using s32k144 EVB for i2c implementation. when i try to verify the data which im sending through the controller using logic analyzer im not getting the proper data through SDA line .
im using PA2 and PA3 for SCL & SDA im attaching my code and snap shot of the SCL & SDA signals please look into it and let mw know where i have did wrong.

#include "Cpu.h" volatile int exit_code = 0; const uint8_t txbuff[8]={0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18}; lpi2c_master_state_t lpi2c1MasterState; const lpi2c_master_user_config_t lpi2c1_MasterConfig0 = { .slaveAddress = 60U, .is10bitAddr = false, .operatingMode = LPI2C_STANDARD_MODE, .baudRate = 0, .transferType = LPI2C_USING_INTERRUPTS, .dmaChannel = 0U, .masterCallback = NULL, .callbackParam = NULL, }; int main(void) { /* Write your local variable definition here */ /*** Processor Expert internal initialization. DON'T REMOVE THIS CODE!!! ***/ #ifdef PEX_RTOS_INIT PEX_RTOS_INIT(); /* Initialization of the selected RTOS. Macro is defined by the RTOS component. */ #endif /*** End of Processor Expert internal initialization. ***/ /* Write your code here */ CLOCK_SYS_Init(g_clockManConfigsArr, CLOCK_MANAGER_CONFIG_CNT,g_clockManCallbacksArr, CLOCK_MANAGER_CALLBACK_CNT); CLOCK_SYS_UpdateConfiguration(0U, CLOCK_MANAGER_POLICY_AGREEMENT); PINS_DRV_Init(NUM_OF_CONFIGURED_PINS, g_pin_mux_InitConfigArr); LPI2C_DRV_MasterInit(INST_LPI2C1, &lpi2c1_MasterConfig0,&lpi2c1MasterState); for(uint8_t data=0x00;data<0xFF;data++) { LPI2C_DRV_MasterSendDataBlocking(INST_LPI2C1,txbuff,sizeof(txbuff),1,1000); } }

bhanu_p_0-1725273184437.png

Re: i2c data not transmitting properly on s32k144

Senlent — Tue, 03 Sep 2024 01:58:15 GMT

Hi@bhanu_p

Please set a larger timeout value and then try again.

For example, modificate timeout value to "0x00ff_ffff" or more larger

LPI2C_DRV_MasterSendDataBlocking(INST_LPI2C1,txbuff,sizeof(txbuff),1,1000);

Re: i2c data not transmitting properly on s32k144

bhanu_p — Tue, 03 Sep 2024 11:56:58 GMT

Hi @Senlent ,

i have alredy given the large timeout still im getting the same response im not getting the data buffer which i have given im only getting the slave id 0x3c as output.

for example i have given timeout "1000" & "5000" still same nothing has been changed. please look in to the code i have share and let me know if any ting wrong

Re: i2c data not transmitting properly on s32k144

Senlent — Wed, 04 Sep 2024 04:53:51 GMT

Hi@bhanu_p

There should be no problem with the code. Try it again by connecting a slave device.
Below is the result of my test using S32K144EVB

Senlent_0-1725425449357.png

Re: i2c data not transmitting properly on s32k144

bhanu_p — Mon, 09 Sep 2024 06:43:16 GMT

Hi @Senlent ,

i have connected my slave and verified but still I'm not getting proper output.

while im checking my slave id is correct or not. im getting "STATUS_TIMEOUT" status.

int main(void) { CLOCK_SYS_Init(g_clockManConfigsArr, CLOCK_MANAGER_CONFIG_CNT, g_clockManCallbacksArr, CLOCK_MANAGER_CALLBACK_CNT); CLOCK_SYS_UpdateConfiguration(0U, CLOCK_MANAGER_POLICY_AGREEMENT); PINS_DRV_Init(NUM_OF_CONFIGURED_PINS, g_pin_mux_InitConfigArr); for(uint8_t data=0;data<255;data++) { int ret; const lpi2c_master_user_config_t lpi2c1_MasterConfig0 = { .slaveAddress = data, .is10bitAddr = false, .operatingMode = LPI2C_STANDARD_MODE, .baudRate = 1000000U, .transferType = LPI2C_USING_INTERRUPTS, .dmaChannel = 0U, .masterCallback = NULL, .callbackParam = NULL, }; LPI2C_DRV_MasterInit(INST_LPI2C1,&lpi2c1_MasterConfig0,&lpi2c1MasterState); ret=LPI2C_DRV_MasterSendDataBlocking(INST_LPI2C1,txbuff,sizeof(txbuff),1,1000); if(ret == STATUS_SUCCESS) { break; } } for(;;) { if(exit_code != 0) { break; } } return exit_code; }

please let me know what i have missed to in this code

im trying to implement GME12864-49 0.96" display, if possible please share any i2c_exmaple it would help me out to solve this issue

Re: i2c data not transmitting properly on s32k144

Senlent — Mon, 09 Sep 2024 06:52:02 GMT

Hi@bhanu_p

" if possible please share any i2c_exmaple it would help me out to solve this issue"

Actually, you can find below example in S32 DS, and the test result i have already send to you before.

Senlent_0-1725864582149.png

Senlent_1-1725864648158.png

Re: i2c data not transmitting properly on s32k144

bhanu_p — Mon, 09 Sep 2024 07:29:08 GMT

hi @Senlent ,

i have tried the example which you have mention in previous post but still my signals are not coming properly please look into it.

Screenshot 2024-09-09 125830.png

Re: i2c data not transmitting properly on s32k144

Senlent — Mon, 09 Sep 2024 07:44:08 GMT

Hi@bhanu_p

I have given a screenshot of the test results, so there is no problem with this routine. Have you used two S32K144EVBs to test this routine?
Try to find your hardware problems, whether the connection is correct, whether the power supply is normal, whether the external pull-up is performed, etc.

Re: i2c data not transmitting properly on s32k144

bhanu_p — Tue, 10 Sep 2024 08:56:15 GMT

Hi @Senlent ,

while working i have observed two things when i use ".baudRate = 10000U," im getting response as below means my slave id is coming properly but after that the TXbuffer data no reflecting and clock is also generating properly but when i use ".baudRate = 100000U," or above im not getting properly signals also below are the 2 different signals.

my slave id is 0x78 data which im sending is

uint8_t data[2];
data[0] = 0x00; // Co=1, D/C#=0 (Command)
data[1] = cmd; // Command to send (0xAE/0xDF/...............)
LPI2C_DRV_MasterSendDataBlocking(INST_LPI2C1, data, 2, true, OSIF_WAIT_FOREVER);

baudrate with 10000U(10khz)

bhanu_p_0-1725958275675.png

baudrate with 100000(100khz)

bhanu_p_1-1725958355100.png

Re: i2c data not transmitting properly on s32k144

Senlent — Wed, 11 Sep 2024 05:44:28 GMT

Hi@bhanu_p

There is no problem with your code. The reason for these phenomena is that your slave device does not respond.

This may be because your slave device does not work properly, or the timing of the transmission is incorrect, or the address sent is incorrect.

I don't have "GME12864-49 0.96" display, and this is beyond our support range.

Re: i2c data not transmitting properly on s32k144

bhanu_p — Wed, 11 Sep 2024 06:09:48 GMT

Hi @Senlent

same display i have used with stm32f407 evb board with 100khz clock and 0x78 is slave id and its working fine and i can see the display data which i'm writing data,

the problem i'm facing with only nxps32144 evb board only

Re: i2c data not transmitting properly on s32k144

Senlent — Wed, 11 Sep 2024 06:24:37 GMT

Hi@bhanu_p

Then please provide me with the results of the logic analysis sampling, and I can help you compare whether the data sent by S32K144EVB is consistent with the data implemented by STM32

Re: i2c data not transmitting properly on s32k144

Senlent — Wed, 11 Sep 2024 08:20:00 GMT

Hi@bhanu_p

Also please try set the slave address to 0x3C and try again.

Re: i2c data not transmitting properly on s32k144

bhanu_p — Wed, 11 Sep 2024 09:04:13 GMT

Hi @Senlent ,

i have observed 2 things when i use 0x78 as slave id in stm32 its working and when i observed the logic analyzer signals slave id is converted to 0x3C(0x78>>1) based on this i have changed my slave id 0x78 to 0x3C in NXPs32 then its working fine now.

Thanks.