Hello,
I am trying to use SPI on port1 (USART1) as Alternative 2.
That is, P1_4 = SS, P1_5=C, P1_6=MO, P1_7=MI
I set up as follows.
CLKCONCMD = (CLKCONCMD & ~(CLKCON_OSC | CLKCON_CLKSPD)) | CLKCON_CLKSPD_32M;
while (CLKCONSTA & CLKCON_OSC); // Wait until clock source has changed
PERCFG = (PERCFG & ~PERCFG_U1CFG) | PERCFG_U1CFG_ALT2; //0x02
P2SEL |= 64 ; // USART1 priority
P2SEL &= ~32 ; // USART1 priority
P1SEL = (P1SEL & ~BIT4) | BIT5 | BIT6 | BIT7;
P1DIR |= BIT4;
U1CSR &= ~(U0CSR_MODE | U0CSR_SLAVE); // Master & SPI
U1BAUD = SPI_BAUD_M; //=0
U1GCR = (U1GCR & ~(U0GCR_BAUD_E | U0GCR_CPOL | U0GCR_CPHA | U0GCR_ORDER))
| SPI_BAUD_E; // =16
After this setup, I tried to send signals as follows.
P1_4 = 0; //SSN = LOW
U1DBUF = 0x90;
while(!(U1CSR & U0CSR_TX_BYTE));
U1CSR &= ~U0CSR_TX_BYTE;
But, I see nothing on pins (with oscilloscope) except SSN=LOW.
Did I something wrong? Am I missing something?
Any advice will be appreciated.
Thanks.
Best regards,
Yeonsik
