Hi,
I am using TM4C1290NCPDT customized board. EEPROM read/write not working using SSI2 for communication.
SSI2DR always showing 0 in register window?
After SSIDataPut execution no change in SSI2DR register
SSIDataPut(SSI2_BASE, ucData);
while( MAP_SSIBusy(SSI2_BASE))
{
}
similarly SSIDataGetNonBlocking execution no change in SSI2DR register
if(SSIDataGetNonBlocking(SSI2_BASE, &uData))
{
*bptrReturnValue = (BYTE)(uData);
}
Kindly help.
Thanks.
Ralph Thanks.
As per EEPROM datasheet,
Mode 0 only I am using in code, anyway if I put the data it will be able to view in DATA register right?.
void SSCHardwareInit( void )
{
UINT32 ui32SysClock;
// The SSI2 peripheral must be enabled for use
MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI2);
//SSI2 is used with PortD[0:3]
MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
// Configure the pin muxing for SSI2 functions on PD[0:3]
MAP_GPIOPinConfigure(GPIO_PD3_SSI2CLK);
// MAP_GPIOPinConfigure(GPIO_PD2_SSI2FSS);
MAP_GPIOPinConfigure(GPIO_PD1_SSI2XDAT0);
MAP_GPIOPinConfigure(GPIO_PD0_SSI2XDAT1);
// Configure the GPIO settings for the SSI pins
// The pins are assigned as follows:
// SSI2
// PD0 - SSI2RX
// PD1 - SSI2TX
// PD2 - SSI2Fss
// PD3 - SSI2CLK
MAP_GPIOPinTypeSSI(GPIO_PORTD_BASE, GPIO_PIN_3 |
/*GPIO_PIN_2 |*/ GPIO_PIN_1 | GPIO_PIN_0);
//get system clock frequency
ui32SysClock = GetSystemClockFrequency();
// Configure and enable the SSI2 port for SPI master mode. Use SSI2,
// system clock supply, idle clock level low and active low clock in legacy
// Freescale SPI mode Moto fmt, polarity 0, phase 0, master mode,
// 2MHz SSI frequency, and 8-bit data.
// previously used 1MHz 2MHz used here needs to check
MAP_SSIConfigSetExpClk(SSI2_BASE, ui32SysClock, SSI_FRF_MOTO_MODE_0,
SSI_MODE_MASTER, 2000000, 8);
// Enable the SSI2 module
MAP_SSIEnable(SSI2_BASE);
GPIOPinWrite(GPIO_PORTH_BASE, GPIO_PIN_0, 1);
}