CC2531 UART Printing to the Console Example

Hi Akash,

Here's some very simple code to use UART as printf();

void uart0Setup(void);
void uartPutc(uint8 c);

int main()
{
  uartPutc('H');
  uartPutc('e');
  uartPutc('l');
  uartPutc('l');
  uartPutc('o');
  uartPutc(' ');
  uartPutc('W');
  uartPutc('o');
  uartPutc('r');
  uartPutc('l');
  uartPutc('d');
}

void uart0Setup(void)
{
#if 1
  PERCFG |= 0x02;  // Alternative 2 for USART 1
  P2DIR &= ~(0xC0); //
  P2DIR |= (0x40); // USART1 peripheral priority 1
  P1SEL |= 0xC0;  // Set P1_6 and P1_7 as peripheral pins
  U1UCR |= 0x80;   // Reset USART1
  U1CSR = 0x80;   // Set USART1 -> UART mode
  U1GCR =   12;   // Generic settings, BAUD_E for 230400
  U1BAUD = 216;    // BAUD_M for 115000
#else
  PERCFG &= ~(0x01);  // Alternative 1 for USART 0
  P2DIR &= ~(0xC0); // USART0 peripheral priority 1
  P0SEL |= 0x0C;  // Set P0_2 and P0_3 as peripheral pins
  U0UCR |= 0x80;   // Reset USART0
  U0CSR = 0x80;   // Set USART0 -> UART mode
//  U0GCR = 0x08;   // Generic settings, BAUD_E for 9600
//  U0BAUD = 59;    // BAUD_M for 9600
//  U0GCR =   11;   // Generic settings, BAUD_E for 115000
  U0GCR =   12;   // Generic settings, BAUD_E for 230400
  U0BAUD = 216;    // BAUD_M for 115000
#endif
}

void uartPutc(uint8 c)
{
#if 1
  while((U1CSR & 0x01));  // Wait until ACTIVE bit is low
  U1DBUF = c;
#else
  while((U0CSR & 0x01));  // Wait until ACTIVE bit is low
  U0DBUF = c;
#endif
}