LPC812这段程序的I2C到底选择的是那两个管脚

chuandaoxy · 发表于 2022-1-15 16:35:18

本帖最后由 chuandaoxy 于 2022-1-15 17:27 编辑

代码来自于万利的实验板自带的测试程序，但是没有测通，大家帮忙看看,是pin7和pin8吗，为啥硬件是p0.11和p0.10还有LPC_SWM->PINENABLE0 = 0xffffffb3UL;这句在测试程序里是屏蔽的，是否需要打开？
void I2C_PinInit(void)                                     //I2C0
{
/* Enable SWM clock */
LPC_SYSCON->SYSAHBCLKCTRL |= (1<<7);

/* Pin Assign 8 bit Configuration */
/* I2C0_SDA */
LPC_SWM->PINASSIGN7 = 0x0bffffffUL;
/* I2C0_SCL */
LPC_SWM->PINASSIGN8 = 0xffffff0aUL;

/* Pin Assign 1 bit Configuration */
/* SWCLK */
/* SWDIO */
/* RESET */
// LPC_SWM->PINENABLE0 = 0xffffffb3UL;

      LPC_IOCON->PIO0_7 |= (0x1<<10);
      LPC_IOCON->PIO0_8 |= (0x1<<10);

      /* Enable I2C clock */
      LPC_SYSCON->SYSAHBCLKCTRL |= (1<<5);
      /* Toggle peripheral reset control to I2C, a "1" bring it out of reset. */
      LPC_SYSCON->PRESETCTRL &= ~(0x1<<6);
      LPC_SYSCON->PRESETCTRL |= (0x1<<6);
}

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