求助M442 SPI

只看该作者 · 2015-4-21 11:54

第一次使用新塘芯片，现在配置PC6 PC7 PC8为SPI0,没有反应，不知道哪里问题。求指导。谢谢。
配置如下

void SYS_Init(void)
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init System Clock */
/*---------------------------------------------------------------------------------------------------------*/
/* Unlock protected registers */
SYS_UnlockReg();

/* Enable External XTAL (4~24 MHz) */
CLK_EnableXtalRC(CLK_PWRCTL_HXTEN_Msk);

/* Waiting for 12MHz clock ready */
CLK_WaitClockReady( CLK_STATUS_HXTSTB_Msk);

/* Switch HCLK clock source to HXT */
CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HXT,CLK_CLKDIV0_HCLK(1));

/* Set PLL to power down mode and PLL_STB bit in CLKSTATUS register will be cleared by hardware.*/
CLK->PLLCTL |= CLK_PLLCTL_PD_Msk;

/* Set PLL frequency */
CLK->PLLCTL = CLK_PLLCTL_84MHz_HXT;

/* Waiting for clock ready */
CLK_WaitClockReady(CLK_STATUS_PLLSTB_Msk);

/* Switch HCLK clock source to PLL */
CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_PLL,CLK_CLKDIV0_HCLK(1));

/* Enable IP clock ============================================================================*/
// CLK_EnableModuleClock(UART4_MODULE);
// CLK_EnableModuleClock(EBI_MODULE);
CLK_EnableModuleClock(TMR0_MODULE);
CLK_EnableModuleClock(SPI0_MODULE);

/* Select IP clock source ======================================================================*/
// CLK_SetModuleClock(UART4_MODULE, CLK_CLKSEL1_UARTSEL_HXT, CLK_CLKDIV0_UART(1));
CLK_SetModuleClock(TMR0_MODULE, CLK_CLKSEL1_TMR0SEL_HXT, 0);

/* Update System Core Clock */
/* User can use SystemCoreClockUpdate() to calculate SystemCoreClock. */
SystemCoreClockUpdate();

/////////////////////////////////////////////////////////////////////////////////////////////////////
//PC5 MISO0; PC6 MOSI0; PC7 CLK
SYS->GPC_MFPL = (SYS->GPC_MFPL & ~(SYS_GPC_MFPL_PC6MFP_Msk | SYS_GPC_MFPL_PC7MFP_Msk)) |
(SYS_GPC_MFPL_PC6MFP_SPI0_MISO0 | SYS_GPC_MFPL_PC7MFP_SPI0_MOSI0 );
SYS->GPC_MFPH = (SYS->GPC_MFPH & ~(SYS_GPC_MFPH_PC8MFP_Msk )) |
(SYS_GPC_MFPH_PC8MFP_SPI0_CLK );

SPI_Open(SPI0, SPI_MASTER, SPI_MODE_0, 8, 10000000); //10M
SPI_TRIGGER(SPI0);