NXP UWB NCJ29D5開發（二）BlinkyLed例程

路徑為UWB\NCJ29D5\NCJ29D5_CAS_Examples_v1.4\onic\BlinkyLed\toolsupport\keil
例程怎么來的可以看看上一篇NXP UWB NCJ29D5開發（一）環境搭建

1、

//系統選擇外部晶振，時鐘頻率為55.2Mhz
phscaAppHal_Init(PHSCA_APPHAL_XO_CLOCK_SOURCE_55P2Mhz);

在文檔NCJ29D5_AppHAL.chm里可以看到，路徑為：UWB\NCJ29D5\NCJ29D5 SDK v11.0\Documentation
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2、

	/*--- Init baseband to enable the LDOs to power VDD_GLOB for LEDs ---*//** 55.2M+xoClkDivderSet:0+hwAcceleratorCfg:0(software encoder) -->rfpllRxTime:75  rfpllTxTime:180*/phIscaBaseband_Config_t gphscaRciAppConfig_Static ={.Control_b.xoClockSel = PHSCA_BB_XO_CLOCK_SOURCE_55P2Mhz, //55.2M.Control_b.xoClkDivderSet = 0u,.Control_b.hwAcceleratorCfg = 0u,};uint16_t rfpllRxTxTime[2] = {0u, 0u};/* Update rfpll tx and rx rampup time in RciConfiguration */phscaAppHal_GetRfpllRxTxRampupTime(gphscaRciAppConfig_Static.Control_b.hwAcceleratorCfg,gphscaRciAppConfig_Static.Control_b.xoClkDivderSet,&rfpllRxTxTime[0u], &rfpllRxTxTime[1u]);gphscaRciAppConfig_Static.Control_b.rfpllRxTime = rfpllRxTxTime[0u];gphscaRciAppConfig_Static.Control_b.rfpllTxTime = rfpllRxTxTime[1u];/* Init Baseband */phscaBaseband_Init(gphscaRciAppConfig_Static);

這個是baseband的初始化過程，參數的設置目的可以在文檔NCJ29D5_Baseband.chm可以看到，路徑為：UWB\NCJ29D5\NCJ29D5 SDK v11.0\Documentation
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很顯然，例程的配置是第一行，從而讓rfpllRxTime=75 rfpllTxTime=180

3、

/* Turn on crystal *//**When set to 1, the crystal oscillator is selected as input of the output buffer driving the XTAL_OUT pin.*If set to 0, the XTAL_OUT configuration is not altered*/phscaAppHal_XoOn(false);/* Init UART */phscaLinFlex_UartInit(PHSCA_LINFLEX_UART_BAUD_115200);

這兩個從字面意思就可以看出，禁能XTAL_OUT和LINFLEX_UART的波特率是115200

4、

/*--- Init P13 (CS2_N) as GPIO ---*/u_port->ALTF_b.CS2_N = 0u; //CS2_N as GPIOu_port->DIR_b.CS2_N = 1u; //0:input 1:outputu_port->PUD_b.CS2_N_PU = 1u; //0:disabel 1:enableu_port->PUD_b.CS2_N_PD = 0u; //0:disabel 1:enableu_port->OUT_b.CS2_N = 1u; //ouput value

CS2_N就是P13腳的一個復用功能之一，這樣就把P13配置為普通GPIO，輸出模式，初始輸出高電平
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相關配置在文檔Ranger-4 user manual里，注釋是簡寫

這里提一下開發需要的文檔如下

5、

	/*--- Init timer GPT0 ---*/uint32_t periodInUs = 500000u;u_timers->TIMERS_TIMER0_PRESCALER_REG_b.TIMER0_PRESCALING_VALUE = 1u; //定時器時鐘預分頻系數u_timers->TIMERS_MODE_REG = 0u; //0：single shot 1:free runningu_timers->TIMERS_INT_SET_ENABLE_REG = 1u; //0:no effect 1:enable INTu_timers->TIMERS_MODE_REG = 1u;

這里很奇怪的一點是TIMERS_MODE_REG 配置了兩次，把u_timers->TIMERS_MODE_REG = 0u;注釋掉也不影響。
同樣相關配置在文檔Ranger-4 user manual里
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6、

uint32_t halfPeriod = periodInUs / 2000u; //250uint8_t preScaler = 1u;uint32_t sysCoreClock = phscaAppHal_GetSystemCoreClock() / 1000u; //55200uint32_t timerRegCount = halfPeriod * (sysCoreClock / preScaler); //13800000, 55200000 / 13800000 = 4，即1秒可以記4次，記一次需要250MS，即250MS進一次中斷u_timers->TIMERS_TIMER0_TIMEOUT_REG = timerRegCount; //計數值

如果想要500MS，簡單做法可以在讓timerRegCount * 2

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7、
NVIC_EnableIRQ(IRQ19_Timer0_IRQn);
定時器中斷向量在startup_NCJ29D5_user.s里面可以看到

8、

__attribute__ ((interrupt ("IRQ")))
void IRQ19_Timer0(void)
{u_port->OUT_b.CS2_N = !u_port->OUT_b.CS2_N;u_timers->TIMERS_INT_CLR_STATUS_REG = 1u; //0:no effect 1:clear timer0 timeout interrupt
}

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到此這個例程結束。

沒找到相關文檔前，看這些代碼還是有點懵的，有文檔后就清晰了。

全部代碼

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*//*** @file* @brief NCJ29D5 Blinky LED App*/
#include <stdbool.h>
#include <stdint.h>// Include NCJ29D5_user.h (rename SPI controller's "EOF" field to "SPI_EOF" to avoid
// clash with EOF macro from stdio.h)
#define EOF SPI_EOF
#include <NCJ29D5_user.h>
#undef EOF#include <stdio.h>
#include <phIscaBaseband.h>
#include <phIscaUtilities.h>
#include <phIscaAppHal.h>
#include <phscaTools.h>
#include <phscaLinFlex.h>int main(void)
{//系統選擇外部晶振，時鐘頻率為55.2MhzphscaAppHal_Init(PHSCA_APPHAL_XO_CLOCK_SOURCE_55P2Mhz);/* Stop Watchdog timer for debugging purpose */phscaUtilities_WdtResetWithMS(0u);/*--- Init baseband to enable the LDOs to power VDD_GLOB for LEDs ---*//** 55.2M+xoClkDivderSet:0+hwAcceleratorCfg:0(software encoder) -->rfpllRxTime:75  rfpllTxTime:180*/phIscaBaseband_Config_t gphscaRciAppConfig_Static ={.Control_b.xoClockSel = PHSCA_BB_XO_CLOCK_SOURCE_55P2Mhz, //55.2M.Control_b.xoClkDivderSet = 0u,.Control_b.hwAcceleratorCfg = 0u,};uint16_t rfpllRxTxTime[2] = {0u, 0u};/* Update rfpll tx and rx rampup time in RciConfiguration */phscaAppHal_GetRfpllRxTxRampupTime(gphscaRciAppConfig_Static.Control_b.hwAcceleratorCfg,gphscaRciAppConfig_Static.Control_b.xoClkDivderSet,&rfpllRxTxTime[0u], &rfpllRxTxTime[1u]);gphscaRciAppConfig_Static.Control_b.rfpllRxTime = rfpllRxTxTime[0u];gphscaRciAppConfig_Static.Control_b.rfpllTxTime = rfpllRxTxTime[1u];/* Init Baseband */phscaBaseband_Init(gphscaRciAppConfig_Static);/* Turn on crystal *//**When set to 1, the crystal oscillator is selected as input of the output buffer driving the XTAL_OUT pin.*If set to 0, the XTAL_OUT configuration is not altered*/phscaAppHal_XoOn(false);/* Init UART */phscaLinFlex_UartInit(PHSCA_LINFLEX_UART_BAUD_115200);printf("\r\n--- Blinky LED ---\n\r");/*--- Init P13 (CS2_N) as GPIO ---*/u_port->ALTF_b.CS2_N = 0u; //CS2_N as GPIOu_port->DIR_b.CS2_N = 1u; //0:input 1:outputu_port->PUD_b.CS2_N_PU = 1u; //0:disabel 1:enableu_port->PUD_b.CS2_N_PD = 0u; //0:disabel 1:enableu_port->OUT_b.CS2_N = 1u; //ouput value/*--- Init timer GPT0 ---*/uint32_t periodInUs = 500000u;u_timers->TIMERS_TIMER0_PRESCALER_REG_b.TIMER0_PRESCALING_VALUE = 1u; //定時器時鐘預分頻系數//u_timers->TIMERS_MODE_REG = 0u; //0：single shot 1:free runningu_timers->TIMERS_INT_SET_ENABLE_REG = 1u; //0:no effect 1:enable INTu_timers->TIMERS_MODE_REG = 1u;uint32_t halfPeriod = periodInUs / 2000u; //250uint8_t preScaler = 1u;uint32_t sysCoreClock = phscaAppHal_GetSystemCoreClock() / 1000u; //55200uint32_t timerRegCount = halfPeriod * (sysCoreClock / preScaler); //13800000, 55200000 / 13800000 = 4，即1秒可以記4次，記一次需要250MS，即250MS進一次中斷u_timers->TIMERS_TIMER0_TIMEOUT_REG = timerRegCount; //計數值printf("Timer Reg Counter = %i\n\r",timerRegCount);NVIC_EnableIRQ(IRQ19_Timer0_IRQn);while(1){}
}__attribute__ ((interrupt ("IRQ")))
void IRQ19_Timer0(void)
{u_port->OUT_b.CS2_N = !u_port->OUT_b.CS2_N;u_timers->TIMERS_INT_CLR_STATUS_REG = 1u; //0:no effect 1:clear timer0 timeout interrupt
}