S32K144EVB之FLASH 开发环境
IAR7.8 + S32K144-EVB
但是上⾯的例程只能在RAM⾥⾯运⾏，在Flash中运⾏时，会在操作Flash时，系统就会复位在S32K14x Series Cookbook.pdf⽂档⾥，找到了⼀段初始化的代码：
LMEM->PCCCR = 0x85000001; /* Invalidate cache & enable write buffer, cache */
MSCM->OCMDR[0] = 0x00000020; /* Bit 5 = 1: Enable program flash prefetch buffer */
MSCM->OCMDR[1] = 0x00000020; /* Bit 5 = 1: Enable data flash prefetch buffer */
⾄此，Flash能够正常读写⽽不会引起复位，⽰例代码如下:
#include "S32K144.h"
#include "S32K144_features.h"
#define RED 15
#define GREEN 16
#define BLUE 0
#define BTN0 12
#define BTN1 13
#define BIT(n) (1 << (n))
typedef unsigned char u8;
typedef unsigned short u16;
typedef unsigned long u32;
typedef void (*pFunction)(void);
typedef void (*iapfun)(void);
pFunction Jump_To_Application;
pFunction jump2app;
#define FLASH_APP1_ADDR 0x00002000
static void Clock_Config(void);
static void Gpio_Config(void);
static void LED_light(u8 color);
文综void MSR_MSP(u32 addr);
static void iap_load_app(u32 appxaddr);
static void EraAndProgram(void);
static u32 temp[2];
int main(void)
{
u32 cnt;
cnt = 0;
Clock_Config();
Gpio_Config();
LED_light(1);
EraAndProgram();
temp[0] = *(unsigned int *)0x00040000;
temp[1] = *(unsigned int *)0x00040004;
if (0xFEEDFACE == temp[0])
LED_light(1+2);
if (0xCAFEBEEF == temp[1])
LED_light(1+2+4);
LED_light(1+2+4);
炒鹌鹑蛋while (1) {
cnt ++;
苏州游乐园if (PTC->PDIR & (BIT(BTN0) | BIT(BTN1))) {
LED_light(0);
iap_load_app(FLASH_APP1_ADDR);//执⾏FLASH APP代码
} el {
LED_light(7);
}
}
}
void SOSC_init_8MHz(void)
{
SCG->SOSCDIV=0x00000101; /* SOSCDIV1 & SOSCDIV2 =1: divide by 1 */
SCG->SOSCCFG=0x00000024;
王任秋子>足球歌曲
/* Range=2: Medium freq (SOSC between 1MHz-8MHz)*/
/* HGO=0: Config xtal osc for low power */
/* EREFS=1: Input is external XTAL */
while(SCG->SOSCCSR & SCG_SOSCCSR_LK_MASK); /* Ensure SOSCCSR unlocked */
SCG->SOSCCSR=0x00000001;
/* LK=0: SOSCCSR can be written */
/* SOSCCMRE=0: OSC CLK monitor IRQ if enabled */
/
* SOSCCM=0: OSC CLK monitor disabled */
/* SOSCERCLKEN=0: Sys OSC 3V ERCLK output clk disabled */
/* SOSCLPEN=0: Sys OSC disabled in VLP modes */
/* SOSCSTEN=0: Sys OSC disabled in Stop modes */
/* SOSCEN=1: Enable oscillator */
while(!(SCG->SOSCCSR & SCG_SOSCCSR_SOSCVLD_MASK)); /* Wait for sys OSC clk valid */
}
void SPLL_init_160MHz(void)
{
while(SCG->SPLLCSR & SCG_SPLLCSR_LK_MASK); /* Ensure SPLLCSR unlocked */
SCG->SPLLCSR = 0x00000000; /* SPLLEN=0: SPLL is disabled (default) */
SCG->SPLLDIV = 0x00000302; /* SPLLDIV1 divide by 2; SPLLDIV2 divide by 4 */
SCG->SPLLCFG = 0x00180000; /* PREDIV=0: Divide SOSC_CLK by 0+1=1 */
/* MULT=24: Multiply sys pll by 4+24=40 */
/* SPLL_CLK = 8MHz / 1 * 40 / 2 = 160 MHz */
while(SCG->SPLLCSR & SCG_SPLLCSR_LK_MASK); /* Ensure SPLLCSR unlocked */
SCG->SPLLCSR = 0x00000001;
/* LK=0: SPLLCSR can be written */
/* SPLLCMRE=0: SPLL CLK monitor IRQ if enabled */
/* SPLLCM=0: SPLL CLK monitor disabled */
/* SPLLSTEN=0: SPLL disabled in Stop modes */
/* SPLLEN=1: Enable SPLL */
while(!(SCG->SPLLCSR & SCG_SPLLCSR_SPLLVLD_MASK)); /* Wait for SPLL valid */
}
void NormalRUNmode_80MHz (void)红楼梦人物关系图高清大图
{
/* Change to normal RUN mode with 8MHz SOSC, 80 MHz PLL*/
SCG->RCCR=SCG_RCCR_SCS(6) | SCG_RCCR_DIVCORE(1) | SCG_RCCR_DIVBUS(1) | SCG_RCCR_DIVSLOW(2);
while (((SCG->CSR & SCG_CSR_SCS_MASK) >> SCG_CSR_SCS_SHIFT ) != 6) {}
/* Wait for sys clk src = SPLL */
}
static void Clock_Config(void)
{
SOSC_init_8MHz(); /* Initialize system oscillator for 8 MHz xtal */
SPLL_init_160MHz(); /* Initialize sysclk to 160 MHz with 8 MHz SOSC */
NormalRUNmode_80MHz(); /* Init clocks: 80 MHz sysclk & core, 40 MHz bus, 20 MHz flash */
}
static void Gpio_Config(void)
{
//config clock source
PCC->PCCn[PCC_PORTD_INDEX] = 0x40000000;
PCC->PCCn[PCC_PORTC_INDEX] = 0x40000000;
//config LED
PORTD->PCR[RED] = 0x00000100;
PORTD->PCR[GREEN] = 0x00000100;
PORTD->PCR[BLUE] = 0x00000100;
//t direction
PTD->PDDR |= BIT(RED) | BIT(GREEN) | BIT(BLUE);
//default output
PTD->PDOR |= BIT(RED) | BIT(GREEN) | BIT(BLUE);
//config BTN
PORTC->PCR[BTN0] = 0x00000100;
PORTC->PCR[BTN1] = 0x00000100;
//t direction
PTC->PDDR &=~(BIT(BTN0) | BIT(BTN1));
}
static void LED_light(u8 color)
{
PTD->PDOR |= BIT(RED) | BIT(GREEN) | BIT(BLUE);
if (color & 0x01)
PTD->PDOR &=~BIT(RED);
if (color & 0x02)
PTD->PDOR &=~BIT(GREEN);遄飞
if (color & 0x04)
PTD->PDOR &=~BIT(BLUE);
}
void MSR_MSP(u32 addr)
{
__asm("MSR MSP, r0\n"//去掉“__”也可
"BX r14\n");
}
void iap_load_app(u32 appxaddr)
{
//if(((*(volatile u32*)appxaddr)&0x2FFE0000)==0x20000000) //检查栈顶地址是否合法.
{
jump2app=(iapfun)*(u32*)(appxaddr+4); //⽤户代码区第⼆个字为程序开始地址(复位地址) //MSR_MSP(*(volatile u32*)appxaddr); //初始化APP堆栈指针(⽤户代码区的第⼀个字⽤于存放栈顶地址) jump2app(); //跳转到APP.
}
}
/*
FSTAT Flash Status Register
FCNFG Flash Configuration Register
FSEC Flash Security Register
FOPT Flash Option Register
FCCOB[FTFC_FCCOB_COUNT] Flash Common Command Object Registers
FPROT[FTFC_FPROT_COUNT] Program Flash Protection Registers
FEPROT EEPROM Protection Register
FDPROT Data Flash Protection Register
FCSESTAT Flash CSEc Status Register
FERSTAT Flash Error Status Register
FERCNFG Flash Error Configuration Register
*/
void EraAndProgram(void)
{
{
LMEM->PCCCR = 0x85000001; /* Invalidate cache & enable write buffer, cache */
MSCM->OCMDR[0] = 0x00000020; /* Bit 5 = 1: Enable program flash prefetch buffer */
MSCM->OCMDR[1] = 0x00000020; /* Bit 5 = 1: Enable data flash prefetch buffer */
//era 4KB flash ctor (the smallest entity that can be erad) at 0x0004_0000
while((FTFC->FSTAT & FTFC_FSTAT_CCIF_MASK) == 0); //wait if operation in progress
FTFC->FSTAT = FTFC_FSTAT_FPVIOL_MASK | FTFC_FSTAT_ACCERR_MASK | FTFC_FSTAT_FPVIOL_MASK; //clear flags if t FTFC->FCCOB[3] = 0x09; //Era Flash Sector command (0x09)
FTFC->FCCOB[2] = 0x04; //Flash address [23:16]
FTFC->FCCOB[1] = 0x00; //Flash address [15:08]
FTFC->FCCOB[0] = 0x00; //Flash address [7:0]
FTFC->FSTAT = FTFC_FSTAT_CCIF_MASK; //launch command
while((FTFC->FSTAT & FTFC_FSTAT_CCIF_MASK) == 0); //wait for done
//program phra at address 0x0004_0000
while((FTFC->FSTAT & FTFC_FSTAT_CCIF_MASK) == 0); //wait if operation in progress
FTFC->FSTAT = FTFC_FSTAT_FPVIOL_MASK | FTFC_FSTAT_ACCERR_MASK | FTFC_FSTAT_F
PVIOL_MASK;
FTFC->FCCOB[3] = 0x07; //Program Phra command (0x07)
FTFC->FCCOB[2] = 0x04; //Flash address [23:16]
FTFC->FCCOB[1] = 0x00; //Flash address [15:08]
FTFC->FCCOB[0] = 0x00; //Flash address [7:0]
FTFC->FCCOB[7] = 0xFE; //data
FTFC->FCCOB[6] = 0xED;
FTFC->FCCOB[5] = 0xFA;
FTFC->FCCOB[4] = 0xCE;
FTFC->FCCOB[11] = 0xCA;
FTFC->FCCOB[10] = 0xFE;
FTFC->FCCOB[9] = 0xBE;檐怎么读音
FTFC->FCCOB[8] = 0xEF;
FTFC->FSTAT = FTFC_FSTAT_CCIF_MASK; //launch command
while((FTFC->FSTAT & FTFC_FSTAT_CCIF_MASK) == 0); //wait for done
}
