Posted on May 17, 2011 at 09:53Hi,
Now I am using the sample code as listed bellow to test the UART port on the MCB-STR9 Eval board V2.0.
It doesn't work at all.
Do anyone know why?
Thanks
eyang
//////////
#include
void com_baudrate (unsigned int baudrate)
{
unsigned long BRDi = 0, BRDf = 0;
unsigned long long UARTClk = 48000000;
if ((SCU->CLKCNTR & SCU_BRCLK_Div2) != SCU_BRCLK_Div2) {
UARTClk /= 2; /* set UART Clock acc. BRSEL */
}
/* baudrate calculation */
BRDi = ((100 * UARTClk) / (16 * baudrate)); /* calculate the integer part */
BRDf = BRDi - (100 * (BRDi / 100)); /* calculate the fractal part */
UART0->CR &= 0xFFFE; /* disable UART */
UART0->IBRD = BRDi / 100; /* set the integer part */
UART0->FBRD = ((((BRDf * 64) + 50) / 100)); /* set the fractal part */
UART0->LCR &= 0xFFFF; /* to accept baudrate */
UART0->CR |= 0x0001; /* enable UART */
}
void init_serial (void) { /* Initialize Serial Interface */
/* UART0 Setup.....................................................*/
SCU->GPIOOUT[3] = 0x0008; /* P3.1 output UART0 TX */
SCU->GPIOIN[3] = 0x01; /* P3.0 input UART0 RX */
UART0->LCR = UART_WordLength_8D /* 8 bits */
| UART_Parity_No /* no Parity */
| UART_HardwareFlowControl_None /* no flow control */
& UART_StopBits_1 /* 1 Stop bit */
& UART_FIFO_Disable; /* FIFO disabled */
UART0->CR = UART_Mode_Rx /* Receive Enable */
| UART_Mode_Tx /* Transmit Enable */
| 0x0001; /* UART Enable */
com_baudrate (115200); /* 115200 Baud */
}
/* implementation of putchar (also used by printf function to output data) */
int sendchar (int ch) { /* Write character to Serial Port */
if (ch == '\n') {
while ((UART0->FR & 0x0020)); /* TX Fifo Full */
UART0->DR = 0x0D; /* output CR */
}
while ((UART0->FR & 0x0020));
return (UART0->DR = ch);
}
