- #include "NM1120.h"
- void SYS_Init(void)
- {
- /* Unlock protected registers */
- SYS_UnlockReg();
-
- /* Enable 48MHz HIRC */
- CLK->PWRCTL = CLK->PWRCTL | CLK_PWRCTL_HIRCEN_Msk;
- /* Waiting for 48MHz clock ready */
- CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);
-
- /* HCLK Clock source from HIRC */
- CLK->CLKSEL0 = CLK->CLKSEL0 | CLK_HCLK_SRC_HIRC;
-
- /* Enable USCI0 IP clock */
- CLK->APBCLK = CLK->APBCLK | CLK_APBCLK_USCI0CKEN_Msk;
- /* Update System Core Clock */
- /* User can use SystemCoreClockUpdate() to calculate SystemCoreClock and cyclesPerUs automatically. */
- SystemCoreClockUpdate();
-
- /* USCI-Uart0-GPD5(TX) + GPD6(RX) */
- /* Set GPD multi-function pins for USCI UART0 GPD5(TX) and GPD6(RX) */
- SYS->GPD_MFP = SYS->GPD_MFP & ~(SYS_GPD_MFP_PD5MFP_Msk | SYS_GPD_MFP_PD6MFP_Msk) | (SYS_GPD_MFP_PD5_UART0_TXD | SYS_GPD_MFP_PD6_UART0_RXD);
-
- /* Set GPD5 as output mode and GPD6 as Input mode */
- PD->MODE = PD->MODE & ~(GPIO_MODE_MODE5_Msk | GPIO_MODE_MODE6_Msk) | (GPIO_MODE_OUTPUT << GPIO_MODE_MODE5_Pos);
-
- /* Lock protected registers */
- SYS_LockReg();
- }
| 
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