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- 2014-9-17
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各位大牛你们好,请教一个问题,我在调试5606s flexcan的demo程序时,无法调通,代码如下,把注释删掉了。
#include "MPC5604B_M27V.h" /* Use proper include file */
void initModesAndClks(void) {
ME.MER.R = 0x0000001D; /* Enable DRUN, RUN0, SAFE, RESET modes */
/* Initialize PLL before turning it on: */
/* Use 1 of the next 2 lines depending on crystal frequency: */
CGM.FMPLL_CR.R = 0x02400100; /* 8 MHz xtal: Set PLL0 to 64 MHz */
ME.RUN[0].R = 0x001F0074; /* RUN0 cfg: 16MHzIRCON,OSC0ON,PLL0ON,syclk=PLL */
ME.RUNPC[1].R = 0x00000010; /* Peri. Cfg. 1 settings: only run in RUN0 mode */
ME.PCTL[17].R = 0x01; /* MPC56xxB/S FlexCAN1: select ME.RUNPC[1] */
ME.PCTL[68].R = 0x01; /* MPC56xxB/S SIUL: select ME.RUNPC[1] */
/* Mode Transition to enter RUN0 mode: */
ME.MCTL.R = 0x40005AF0; /* Enter RUN0 Mode & Key */
ME.MCTL.R = 0x4000A50F; /* Enter RUN0 Mode & Inverted Key */
while (ME.GS.B.S_MTRANS) {} /* Wait for mode transition to complete */
/* Note: could wait here using timer and/or I_TC IRQ */
while(ME.GS.B.S_CURRENTMODE != 4) {} /* Verify RUN0 is the current mode */
}
void initPeriClkGen(void) {
// CGM.SC_DC[1].R = 0x80; /* MPC56xxB/S: Enable peri set 2 sysclk divided by 1 */
CGM.SCDC.R = 0x80808000; /* MPC56xxB/S: Enable peri set 2 sysclk divided by 1 这里做了修改,因为demo例子是56xxB的。*/
}
void disableWatchdog(void) {
SWT.SR.R = 0x0000c520; /* Write keys to clear soft lock bit */
SWT.SR.R = 0x0000d928;
SWT.CR.R = 0x8000010A; /* Clear watchdog enable (WEN) */
}
void initCAN_1 (void)
{
uint8_t i;
CAN_0.MCR.R = 0x5000003F; /* Put in Freeze Mode & enable all 64 msg bufs */
CAN_0.CR.R = 0x04DB0006; /* Configure for 8MHz OSC, 100KHz bit time */
for (i=0; i
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