Content originally posted in LPCWare by malei222222 on Thu Dec 24 08:17:52 MST 2015
系统使用30M的速度，如下设置：
#define SYSPLLCTRL_Val 0x00000024
#define SYSAHBCLKDIV_Val 0x00000002
串口的设置如下：（SystemCoreClock = 30M，UART_BPS = 115200）
baudRateGenerator = SystemCoreClock / (16 * UART_BPS);
err = SystemCoreClock - baudRateGenerator * 16 * UART_BPS;
uart_fra_multiplier = (err * 0xFF) / (baudRateGenerator * 16 * UART_BPS);
LPC_USART0->BRG = baudRateGenerator - 1;
LPC_SYSCON->UARTFRGDIV = 0XFF;
LPC_SYSCON->UARTFRGMULT = uart_fra_multiplier;
如上设置之后，串口输出会乱码，并不是115200，请问要如何设置，哪里的计算不对？
