STC32G手册的两个问题
1.第588页有个笔误。此处应为PWMA_CCMR1
2.第400页，超级简单的 STC USB-CDC 虚拟串口应用，设置步骤里最后一步是给keil添加REMOVEUNUSED参数
这里不可以添加REMOVEUNUSED参数，否则不能正常工作
测试代码如下：
#include <stc32g.h>
#include <stc32_stc8_usb.h>
char *USER_DEVICEDESC = NULL;
char *USER_PRODUCTDESC = NULL;
char *USER_STCISPCMD = "@STCISP#";
long a;
float b;
sbit led = P2^0;
void main()
{
WTST = 0;
CKCON = 0;
EAXFR = 1;
P0M1 = 0x00; P0M0 = 0x00;
P1M1 = 0x00; P1M0 = 0x00;
P2M1 = 0x00; P2M0 = 0x00;
P3M1 = 0x00; P3M0 = 0x00;
P4M1 = 0x00; P4M0 = 0x00;
P5M1 = 0x00; P5M0 = 0x00;
P6M1 = 0x00; P6M0 = 0x00;
P7M1 = 0x00; P7M0 = 0x00;
P3M0 &= ~0x03;
P3M1 |= 0x03;
IRC48MCR = 0x80;
while (!(IRC48MCR & 0x01));
USBCLK = 0x00;
USBCON = 0x90;
usb_init();
IE2 |= 0x80;
EA = 1;
while (DeviceState != DEVSTATE_CONFIGURED);
a = b;
led = 0;
while (1);
}
如果添加了REMOVEUNUSED，P2.0端口的led不会点亮，也无法使用不停电自动 ISP 下载的功能。去掉REMOVEUNUSED则一切正常。 问题收到，多谢反馈
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