Cortex-M0 MCU Clocks & Pins 1/26/2016 Richard Kuo Assistant Professor

Outline Introduction of main.c Introduction of SYS_init.c Intorduction of MCU_init.h NuTool – PinView

main.c Comment for EVB, MCU & connections pin connections // // proj_SmartHome : receive command from Android phone/tablet // EVB : NuTiny-EVB-Nano102 // MCU : Nano102SC2AN (LQFP64) // Features : // printf to display message on Debugger's UART#1 view // UART1 to HC05 : transmit/receive data through Bluetooth // baudrate=9600, databit=8, stopbit=1, paritybit=0, flowcontrol=None // TIMER0 interrupt every 0.1 sec, then the command from Android phone/tablet // GPIO to input device : read button or sensor // GPIO to output device: control LED on/off // ADC4 to photoresistor : read luminance // I2C1 to 3-axis Accelerometer & Gyroscope, OLED display // RTC to report time #include <stdio.h> #include <math.h> #include <string.h> #include "Nano1X2Series.h“ #include “MCU_init.h” #include “SYS_init.h” Comment for EVB, MCU & connections pin connections include header files

main.c Global Variables Interrupt Service Routine uint8_t Text[24]; uint8_t Text_RTC[32]; volatile char RX_buffer[RXBUFSIZE]; volatile uint8_t command; volatile uint32_t u32ADCvalue; volatile uint32_t g_u32TICK = 0; volatile uint8_t Flag_report =0; void UART1_IRQHandler(void) { uint32_t u32IntSts= UART1->ISR; if(u32IntSts & UART_IS_RX_READY(UART1)) { UART_Read(UART1, RX_buffer, RXBUFSIZE); command=RX_buffer[0]; Flag_report=1; //printf("%c\n", command); } Global Variables Interrupt Service Routine

Host Clock Selection

SYS_init.c – System Initialization void SYS_Init(void) { SYS_UnlockReg(); // Unlock protected registers // select Chip clock source & set clock source CLK_EnableXtalRC(MCU_CLOCK_SOURCE_MASK); // Enable HXT external 12MHz crystal CLK_WaitClockReady(MCU_CLOCK_STABLE_MASK); CLK_SetCoreClock(MCU_CLOCK_FREQUENCY); // Set HCLK clock to 32MHz // Select IP clock source & enable module #ifdef MCU_INTERFACE_RTC CLK_EnableModuleClock(RTC_MODULE); CLK_SetModuleClock(RTC_MODULE, CLK_CLKSEL2_RTC_SEL_10K_LXT, 0); #endif Set HCLK Set IP clock

SYS_init.c – IP Clock Cetting #ifdef MCU_INTERFACE_WDT CLK_EnableModuleClock(WDT_MODULE); #ifdef WDT_CLOCK_SOURCE_LIRC CLK_SetModuleClock(WDT_MODULE, CLK_CLKSEL1_WDT_S_LIRC, 0); #endif #ifdef CLK_CLKSEL1_WDT_S_HCLK_DIV2048 CLK_SetModuleClock(WDT_MODULE, CLK_CLKSEL1_WDT_S_HCLK_DIV2048, 0); #ifdef WDT_CLOCK_SOURCE_LXT CLK_SetModuleClock(WDT_MODULE, CLK_CLKSEL1_WDT_S_LXT, 0); #ifdef MCU_INTERFACE_WWDT CLK_EnableModuleClock(WWDT_MODULE); #ifdef WWDT_CLOCK_SOURCE_HCLK_DIV2048 CLK_SetModuleClock(WWDT_MODULE, CLK_CLKSEL2_WWDT_S_HCLK_DIV2048, 0); #ifdef WWDT_CLOCK_SOURCE_LIRC CLK_SetModuleClock(WWDT_MODULE, CLK_CLKSEL2_WWDT_S_LIRC, 0); WDT clock setting WWDT clock setting

SYS_init.c – Set MultiFunction Pins // Init I/O Multi-function // Set multi-function pins for ACMP #ifdef PIN_ACMP0_P_PC6 SYS->GPC_MFP = (SYS->GPC_MFP & ~SYS_GPC_MFP_PC6_Msk) | SYS_GPC_MFP_PC6_ACMP0_P; SYS->ALT_MFP1= (SYS->ALT_MFP1& ~SYS_ALT_MFP_PC6_Msk) | SYS_ALT_MFP1_PC6_ACMP0_P; GPIO_DISABLE_DIGITAL_PATH(PC, BIT6); #endif #ifdef PIN_ACMP0_N_PC7 SYS->GPC_MFP = (SYS->GPC_MFP & ~SYS_GPC_MFP_PC7_Msk) | SYS_GPC_MFP_PC7_ACMP0_N; SYS->ALT_MFP1= (SYS->ALT_MFP1& ~SYS_ALT_MFP_PC7_Msk) | SYS_ALT_MFP1_PC7_ACMP0_N; GPIO_DISABLE_DIGITAL_PATH(PC, BIT7); #ifdef PIN_ACMP1_P_PC14 SYS->GPC_MFP = (SYS->GPC_MFP & ~SYS_GPC_MFP_PC14_Msk) | SYS_GPC_MFP_PC14_ACMP1_P; SYS->ALT_MFP1= (SYS->ALT_MFP1& ~SYS_ALT_MFP_PC14_Msk) | SYS_ALT_MFP1_PC14_ACMP1_P; GPIO_DISABLE_DIGITAL_PATH(PC, BIT14);

MCU_init.h //Define Clock source #define MCU_CLOCK_SOURCE #define MCU_CLOCK_SOURCE_HXT // HXT, LXT, HIRC, LIRC #define MCU_CLOCK_SOURCE_LXT #define MCU_CLOCK_FREQUENCY 50000000 //Hz //Define MCU Interfaces

MCU_init.h with ADC #define MCU_INTERFACE_ADC #define ADC_CLOCK_SOURCE_HXT // HXT, LXT, PLL, HIRC, HCLK #define ADC_CLOCK_DIVIDER 1 #define PIN_ADC_0 #define PIN_ADC_1 #define PIN_ADC_2 #define PIN_ADC_3 #define ADC_CHANNEL_MASK ADC_CH_0_MASK | ADC_CH_1_MASK | ADC_CH_2_MASK | ADC_CH_3_MASK #define ADC_INPUT_MODE ADC_INPUT_MODE_SINGLE_END // SINGLE_END, DIFFERENTIAL #define ADC_OPERATION_MODE ADC_OPERATION_MODE_CONTINUOUS // SINGLE, SINGLE_CYCLE, CONTINUOUS

MCU_init.h with Timer #define MCU_INTERFACE_TMR0 #define TMR0_CLOCK_SOURCE_HIRC // HXT, LXT, HCLK, EXT, LIRC, HIRC #define TMR0_CLOCK_DIVIDER 1 #define TMR0_OPERATING_MODE TIMER_ONESHOT_MODE // ONESHOT, PERIODIC, TOGGLE, CONTINUOUS #define TMR0_OPERATING_FREQ 1 //Hz

MCU_init.h with Timer Capture #define MCU_INTERFACE_TMR2 #define TMR2_CLOCK_SOURCE_HXT // HXT, LXT, HCLK, EXT, LIRC, HIRC #define TMR2_CLOCK_DIVIDER 12 #define TMR2_OPERATING_MODE TIMER_CONTINUOUS_MODE // ONESHOT, PERIODIC, TOGGLE, CONTINUOUS #define TMR2_OPERATING_FREQ 1000000 //Hz #define TMR2_EVENT_DETECTION TIMER_COUNTER_FALLING_EDGE // FALLING, RISING #define TMR2_CAPTURE_MODE TIMER_CAPTURE_FREE_COUNTING_MODE // FREE_COUNTING, COUNTER_RESET #define TMR2_CAPTURE_EDGE TIMER_CAPTURE_FALLING_AND_RISING_EDGE // FALLING, RISING, FALLING_AND_RISING #define PIN_TC2_PB2 // TC0_PB15, TC1_PE5, TC2_PB2, TC3_PB3

MCU_init.h with WDT #define MCU_INTERFACE_WDT #define WDT_CLOCK_SOURCE_LXT // LIRC, HCLK_DIV2048, LXT

MCU_init.h with RTC #define MCU_INTERFACE_RTC

MCU_init.h with ADC #define MCU_INTERFACE_ADC #define ADC_CLOCK_SOURCE_HXT // HXT, LXT, PLL, HIRC, HCLK #define ADC_CLOCK_DIVIDER 1 #define PIN_ADC_0 #define PIN_ADC_1 #define PIN_ADC_2 #define PIN_ADC_3 #define ADC_CHANNEL_MASK ADC_CH_0_MASK | ADC_CH_1_MASK | ADC_CH_2_MASK | ADC_CH_3_MASK #define ADC_INPUT_MODE ADC_INPUT_MODE_SINGLE_END // SINGLE_END, DIFFERENTIAL #define ADC_OPERATION_MODE ADC_OPERATION_MODE_CONTINUOUS // SINGLE, SINGLE_CYCLE, CONTINUOUS

MCU_init.h with PWM //Define MCU Interfaces #define MCU_INTERFACE_PWM0 #define PWM0_CH01_CLOCK_SOURCE_HCLK // HXT, LXT, HCLK, HIRC #define PIN_PWM0_CH0_PA12 #define PIN_PWM0_CH1_PA13 #define PIN_PWM0_CH2_PA14 #define PIN_PWM0_CH3_PA15 different MCU seriers may use a different pin out of the interface

MCU_init.h with PWM #define MCU_INTERFACE_PWM0 #define PWM0_CH01_CLOCK_SOURCE_HCLK // HXT, LXT, HCLK, HIRC #define PIN_PWM0_CH0_PA12 #define PIN_PWM0_CH1_PA13 #define PIN_PWM0_CH2_PA14 #define PIN_PWM0_CH3_PA15 different MCU seriers may use a different pin out of the interface

MCU_init.h with SPI #define MCU_INTERFACE_SPI3 #define SPI_CLOCK_SOURCE_HCLK #define PIN_SPI3_SCLK_PD9 #define PIN_SPI3_MISO0_PD10 #define PIN_SPI3_MOSI0_PD11 //#define PIN_SPI3_MISO1_PD12 //#define PIN_SPI3_MOSI1_PD13 different MCU seriers may use a different pin out of the interface

MCU_init.h with I2C #define MCU_INTERFACE_I2C1 #define I2C1_CLOCK_FREQUENCY 400000 //Hz #define PIN_I2C1_SCL_PA11 #define PIN_I2C1_SDA_PA10 different MCU seriers may use a different pin out of the interface

MCU_init.h with UART #define MCU_INTERFACE_UART1 #define UART_CLOCK_SOURCE_HIRC // HXT, LXT, PLL, HIRC #define UART_CLOCK_DIVIDER 3 #define PIN_UART1_RX_PB4 #define PIN_UART1_TX_PB5 different MCU seriers may use a different pin out of the interface

MCU_init.h with USB #define MCU_INTERFACE_USB #define USB_CLOCK_DIVIDER 1

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