I want to print strings on the serial terminal. Below is the code. Its working as expected with GNURL78 compiler, but printing garbage value when compiled with CC-RL compiler. Please tell me where am I making the mistake.
I am using R5F10BMG MCU and e2 studio IDE.
void uart1_p_init (void)
/***** Configure UART0 *****/
/* Supply clock to serial array unit 1 */
SAU1EN = 1U;
/* >=4 cycle delay required by manual */
/***** Set input clock (CK00 and CK01) to Fclk *****/
/* ck00 - fCLK/2^4 and ck01 - fCLK */
SPS1 = 0x0004U | 0x0040U;
/***** Setup operation mode for transmitter (channel 1) *****/
/* SMR10 initial value */
SMR10 = 0x0020U | 0x0002U | 0x0001U;
SCR10 = 0x8000U | 0x0080U | 0x0010U | 0x0007U;
SDR10 = 0xCE00U; //_CE00_UART1_TRANSMIT_DIVISOR;
/* noise filter on */
NFEN0 = 0x04U;
SIR11 = 0x0004U | 0x0002U | 0x0001U; /* clear error flag */
SMR11 = 0x0020U | 0x0100U | 0x0002U;
SCR11 = 0x4000U | 0x0080U | 0x0010U | 0x0007U;
SDR11 = 0xCE00U;
/* Output is not inverted */
SO1 |= 0x0001U;
SOL1 |= 0x0000U; /* output level normal */
SOE1 |= 0x0001U; /* enable UART1 output */
/* Set RxD1 pin */
PM1 |= 0x02U; //P11 as RxD1
/* Set TxD1 pin */
PM1 &= 0xFBU; //P12 as TxD1
P1 |= 0x04U;
/* Enable UART1 transmit and receive operation (channel 1) */
SS1 = 0x0002U | 0x0001U;
/* Enable INTST1 interrupt flag */
STIF1 = 1U;
SRIF1 = 1U;
/* Transmit the character */
unsigned char uart1_putchar(unsigned char c)
while (0U == STIF1);
STIF1 = 0U;
SDR10L = (unsigned char)c;
return (unsigned char)SDR10L;
void uart1_puts(const unsigned char *s)
while ('\0' != *s)
It sounds like the UART is working but not the right speed, so it must be something in the clock tree. Check your option bytes for the setting of the high-speed on-chip osc, then work your way towards…
If there is some issue with the clock tree setting, then why on compiling the code with GNU compiler, the code is transmitting string properly?
The option bytes are set using different methods between the two tools, that is why I suggested looking at that first.
It sounds like the UART is working but not the right speed, so it must be something in the clock tree. Check your option bytes for the setting of the high-speed on-chip osc, then work your way towards the peripheral clock, there must be a setting that is different between the builds.
On adding options -user_opt_byte=E9FFE8 and -ocdbg=04 to the linker command, its working fine! Thanks a lot!!!