TM4C1294KCPDT: SSI1 CLK is PB5, but get PE5. Is there any idea? SSI2 is working as expected

Shoujie Li

Part Number: TM4C1294KCPDT

/* SSI1 */
SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI1);

GPIOPinConfigure(GPIO_PB5_SSI1CLK);
GPIOPinConfigure(GPIO_PB4_SSI1FSS);
GPIOPinConfigure(GPIO_PE4_SSI1XDAT0);
GPIOPinConfigure(GPIO_PE5_SSI1XDAT1);

GPIOPinTypeSSI(GPIO_PORTB_BASE, GPIO_PIN_4 | GPIO_PIN_5);
GPIOPinTypeSSI(GPIO_PORTE_BASE, GPIO_PIN_4 | GPIO_PIN_5);

/* SSI2 */
SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI2);

GPIOPinConfigure(GPIO_PD3_SSI2CLK);
GPIOPinConfigure(GPIO_PD2_SSI2FSS);
GPIOPinConfigure(GPIO_PD1_SSI2XDAT0);
GPIOPinConfigure(GPIO_PD0_SSI2XDAT1);

GPIOPinTypeSSI(GPIO_PORTD_BASE, GPIO_PIN_0 | GPIO_PIN_1 |
GPIO_PIN_2 | GPIO_PIN_3);

EK_TM4C1294XL_initDMA();
SPI_init();

over 6 years ago

0 Charles Tsai over 6 years ago

TI__Guru**** 191886 points

Hi,

Are you sure you are seeing SPICLK on PE5 which is the SSI1RX?

Can you show your scope capture on PB5 (SSI1CLK), PB4 (SSI1Fss), PE4 (SSI1TX) and PE5 (SSI1RX)?

I assume you are running the code on your custom board, correct? Can you run the same code on the LaunchPad?

Please also double check your board if you have the correct connection.

0 Shoujie Li over 6 years ago in reply to Charles Tsai

Prodigy 160 points

Hi Dear Tsai,

I got screen shot from my logic analyzer from SSI1 interface. SSI2 and SS3 are working perfectly. I noticed SSI1 is not even enable from its CR1 enable bit.

I checked my connections again several times.

Thanks,

Shoujie

0 Shoujie Li over 6 years ago in reply to Shoujie Li

Prodigy 160 points

Hi Mr Tsai,

Sorry I got a wrong logic analyzer connection. After I change a new one. It seems right.

Thanks,

Shoujie

Arm-based microcontrollers

Arm-based microcontrollers forum

TM4C1294KCPDT: SSI1 CLK is PB5, but get PE5. Is there any idea? SSI2 is working as expected