I am using Nuvoton ARM Board. Here i want to use UART1 but the printf function is not working for any other UART port leaving UART0.
void SYS_Init(void) { /*---------------------------------------------------------------------------------------------------------*/ /* Init System Clock */ /*---------------------------------------------------------------------------------------------------------*/ /* Enable HIRC clock (Internal RC 22.1184MHz) */ CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk); /* Wait for HIRC clock ready */ CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk); /* Select HCLK clock source as HIRC and and HCLK clock divider as 1 */ CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1)); /* Enable HXT clock (external XTAL 12MHz) */ CLK_EnableXtalRC(CLK_PWRCTL_HXTEN_Msk); /* Wait for HXT clock ready */ CLK_WaitClockReady(CLK_STATUS_HXTSTB_Msk); /* Set core clock as PLL_CLOCK from PLL */ CLK_SetCoreClock(PLL_CLOCK); /* Enable UART module clock */ CLK_EnableModuleClock(UART1_MODULE); /* Select UART module clock source as HXT and UART module clock divider as 1 */ CLK_SetModuleClock(UART1_MODULE, CLK_CLKSEL1_UARTSEL_HXT, CLK_CLKDIV0_UART(1)); /*---------------------------------------------------------------------------------------------------------*/ /* Init I/O Multi-function */ /*---------------------------------------------------------------------------------------------------------*/ /* Set PD multi-function pins for UART0 RXD(PD.6) and TXD(PD.1) */ // SYS->GPD_MFPL &= ~(SYS_GPD_MFPL_PD6MFP_Msk | SYS_GPD_MFPL_PD1MFP_Msk); //SYS->GPD_MFPL |= (SYS_GPD_MFPL_PD6MFP_UART0_RXD | SYS_GPD_MFPL_PD1MFP_UART0_TXD); SYS->GPB_MFPL &= ~(SYS_GPB_MFPL_PB2MFP_Msk | SYS_GPB_MFPL_PB3MFP_Msk); SYS->GPB_MFPL |= (SYS_GPB_MFPL_PB2MFP_UART1_RXD | SYS_GPB_MFPL_PB3MFP_UART1_TXD); } void UART1_Init() { /*---------------------------------------------------------------------------------------------------------*/ /* Init UART */ /*---------------------------------------------------------------------------------------------------------*/ /* Reset UART module */ SYS_ResetModule(UART1_RST); /* Configure UART0 and set UART0 baud rate */ UART_Open(UART1, 9600); } /*---------------------------------------------------------------------------------------------------------*/ /* Main Function */ /*---------------------------------------------------------------------------------------------------------*/ int32_t main(void) { /* Unlock protected registers */ SYS_UnlockReg(); /* Init System, peripheral clock and multi-function I/O */ SYS_Init(); /* Lock protected registers */ SYS_LockReg(); /* Init UART0 for printf */ UART1_Init(); printf("\n\nCPU @ %dHz\n", SystemCoreClock); printf("UART test\n\r"); while(1); }
How do you determine that?
What kind of "garbage", exactly?
The vast majority of such UART problems are due to the baud rate being wrong.
Have you verified that the data received form UART1 is "good"?