/* Board Debug UART Initialisation function */
static void Board_UART_Init(void)
{
Chip_SYSCTL_Enable_ASYNC_Syscon(true);
/* Divided by 1 */
Chip_Clock_SetAsyncSysconClockDiv(1);
/* UART0 pins are setup in board_sysinit.c */
}
static void UART_PinMuxSetup(void)
{
#if defined(BOARD_NXP_LPCXPRESSO_54102)
/* Setup UART TX Pin */
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 0, (IOCON_FUNC1 | IOCON_MODE_INACT | IOCON_DIGITAL_EN));
/* Setup UART RX Pin */
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 1, (IOCON_FUNC1 | IOCON_MODE_INACT | IOCON_DIGITAL_EN));
Chip_SYSCON_Enable_ASYNC_Syscon(true); /* Enable Async APB */
Chip_Clock_SetAsyncSysconClockDiv(1); /* Set Async clock divider to 1 */
#else
#warning "No UART PIN/CLK setup for this example"
#endif
}
/* UART Pin mux function - note that SystemInit() may already setup your
pin muxing at system startup */
static void Init_UART_PinMux(void)
{
#if defined(BOARD_NXP_LPCXPRESSO_54000)
Chip_Clock_SetAsyncSysconClockDiv(1); /* divided by 1 */
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 0, IOCON_MODE_INACT | IOCON_FUNC1 | IOCON_DIGITAL_EN | IOCON_INPFILT_OFF);
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 1, IOCON_MODE_INACT | IOCON_FUNC1 | IOCON_DIGITAL_EN | IOCON_INPFILT_OFF);
#else
/* Configure your own UART pin muxing here if needed */
#warning No UART pin muxing defined
#endif
}
/* Clock and PLL initialization based on the external clock input */
void Chip_SetupExtInClocking(uint32_t iFreq)
{
PLL_CONFIG_T pllConfig;
PLL_SETUP_T pllSetup;
PLL_ERROR_T pllError;
/* IOCON clock left on, this is needed is CLKIN is used. */
Chip_Clock_EnablePeriphClock(SYSCON_CLOCK_IOCON);
/* Select external clock input pin */
Chip_IOCON_PinMuxSet(LPC_IOCON, 0, 22, (IOCON_MODE_PULLUP |
IOCON_FUNC1 | IOCON_DIGITAL_EN | IOCON_INPFILT_OFF));
/* Select the PLL input to the EXT clock input */
Chip_Clock_SetSystemPLLSource(SYSCON_PLLCLKSRC_CLKIN);
/* Setup FLASH access */
setupFlashClocks(iFreq);
/* Power down PLL to change the PLL divider ratio */
Chip_SYSCON_PowerDown(SYSCON_PDRUNCFG_PD_SYS_PLL);
/* Setup PLL configuration */
pllConfig.desiredRate = iFreq;
pllConfig.InputRate = 0;
pllConfig.flags = PLL_CONFIGFLAG_FORCENOFRACT;
pllError = Chip_Clock_SetupPLLData(&pllConfig, &pllSetup);
if (pllError == PLL_ERROR_SUCCESS) {
pllSetup.flags = PLL_SETUPFLAG_WAITLOCK | PLL_SETUPFLAG_ADGVOLT;
pllError = Chip_Clock_SetupSystemPLLPrec(&pllSetup);
}
/* Set system clock divider to 1 */
Chip_Clock_SetSysClockDiv(1);
/* Set main clock source to the system PLL. This will drive 24MHz
for the main clock and 24MHz for the system clock */
Chip_Clock_SetMainClockSource(SYSCON_MAINCLKSRC_PLLOUT);
/* ASYSNC SYSCON needs to be on or all serial peripheral won't work.
Be careful if PLL is used or not, ASYNC_SYSCON source needs to be
selected carefully. */
Chip_SYSCON_Enable_ASYNC_Syscon(true);
Chip_Clock_SetAsyncSysconClockDiv(1);
Chip_Clock_SetAsyncSysconClockSource(SYSCON_ASYNC_IRC);
}
/* Set up and initialize clocking prior to call to main */
void Board_SetupClocking(void)
{
/* The IRC is always the first clock source even if CLK_IN is used later.
Once CLK_IN is selected as the clock source. We can turned off the IRC later.
Turn on the IRC by clearing the power down bit */
Chip_SYSCTL_PowerUp(PDRUNCFG_PD_IRC_OSC_EN | PDRUNCFG_PD_IRC_EN);
//Board_SetupXtalClocking();
Board_SetupIRCClocking();
/* Select the CLKOUT clocking source */
Chip_Clock_SetCLKOUTSource(SYSCTL_CLKOUTSRC_MAINSYSCLK, 1);
/* ASYSNC SYSCON needs to be on or all serial peripheral won't work.
Be careful if PLL is used or not, ASYNC_SYSCON source needs to be
selected carefully. */
Chip_SYSCTL_Enable_ASYNC_Syscon(true);
Chip_Clock_SetAsyncSysconClockDiv(1);
Chip_Clock_SetAsyncSysconClockSource(ASYNC_SYSCTL_CLOCK_IRC);
}
/* Clock and PLL initialization based on the internal oscillator */
void Chip_SetupIrcClocking(uint32_t iFreq)
{
PLL_CONFIG_T pllConfig;
PLL_SETUP_T pllSetup;
PLL_ERROR_T pllError;
/* Turn on the IRC by clearing the power down bit */
Chip_SYSCON_PowerUp(SYSCON_PDRUNCFG_PD_IRC_OSC | SYSCON_PDRUNCFG_PD_IRC);
/* Select the PLL input to the IRC */
Chip_Clock_SetSystemPLLSource(SYSCON_PLLCLKSRC_IRC);
/* Setup FLASH access */
setupFlashClocks(iFreq);
/* Power down PLL to change the PLL divider ratio */
Chip_SYSCON_PowerDown(SYSCON_PDRUNCFG_PD_SYS_PLL);
/* Setup PLL configuration */
pllConfig.desiredRate = iFreq;
pllConfig.InputRate = 0;
pllConfig.flags = PLL_CONFIGFLAG_FORCENOFRACT;
pllError = Chip_Clock_SetupPLLData(&pllConfig, &pllSetup);
if (pllError == PLL_ERROR_SUCCESS) {
pllSetup.flags = PLL_SETUPFLAG_WAITLOCK | PLL_SETUPFLAG_ADGVOLT;
pllError = Chip_Clock_SetupSystemPLLPrec(&pllSetup);
}
Chip_Clock_SetSysClockDiv(1);
Chip_Clock_SetMainClockSource(SYSCON_MAINCLKSRC_PLLOUT);
//Chip_Clock_SetCLKOUTSource(SYSCON_CLKOUTSRC_MAINCLK, 1);
/* ASYSNC SYSCON needs to be on or all serial peripheral won't work.
Be careful if PLL is used or not, ASYNC_SYSCON source needs to be
selected carefully. */
Chip_SYSCON_Enable_ASYNC_Syscon(true);
Chip_Clock_SetAsyncSysconClockDiv(4);
Chip_Clock_SetAsyncSysconClockSource(SYSCON_ASYNC_MAINCLK);//SYSCON_ASYNC_IRC);//SYSCON_ASYNC_SYSPLLOUT
}