Ilgrim/FwLib_STC8
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This commit is contained in:
IOsetting 2022-02-09 14:49:48 +08:00
parent 1dc7666b27
commit 3d22dac649
1 changed files with 141 additions and 151 deletions
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26
demo/usb/usb_keyboard.c
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@ -23,8 +23,6 @@
#include "fw_hal.h"
#include <string.h>
#define MAIN_Fosc 24000000L
#define Timer0_Reload (65536UL -(MAIN_Fosc / 1000)) //Timer 0 frequency 1000Hz
#define KeyIO P0
__BIT B_1ms; // 1ms flag
@ -53,7 +51,6 @@ void USB_Init(void);
void KeyScan(void);
void SendKeyStatus(void);
void main()
{
uint8_t i;
@ -378,7 +375,7 @@ void SendKeyStatus(void)
if(KeyCode) // if key pressed
{
// 4*4 key matrix，max 3 keys pressed simultaneously
// allow 3 keys pressed simultaneously
if(KeyCount(KeyCode) > 3)
{
return; // too many keys
@ -462,19 +459,13 @@ P02 ---- K08 ---- K09 ---- K10 ---- K11 ----
P03 ---- K12 ---- K13 ---- K14 ---- K15 ----
| | | |
******************************************************/
void IO_KeyDelay(void)
{
uint8_t i;
i = 5;
while(--i);
}
void KeyScan(void)
{
uint8_t temp;
KeyIO = 0x0F;
IO_KeyDelay();
SYS_DelayUs(1);
if ((KeyIO & 0x0F) == 0x0F) // no key pressed
{
NewKeyCode = 0;
@ -483,27 +474,26 @@ void KeyScan(void)
{
// scan first line
KeyIO = (uint8_t)~0x10;
IO_KeyDelay();
SYS_DelayUs(1);
// save 4 keys status
temp = KeyIO & 0x0F;
// second line
KeyIO = (uint8_t)~0x20;
IO_KeyDelay();
// save 4 keys status
SYS_DelayUs(1);
temp |= KeyIO << 4;
// save current key status
NewKeyCode = (~temp) & 0xFF;
// scan third line
// third line
KeyIO = (uint8_t)~0x40;
IO_KeyDelay();
SYS_DelayUs(1);
temp = KeyIO & 0x0F;
// scan 4th line
// 4th line
KeyIO = (uint8_t)~0x80;
IO_KeyDelay();
SYS_DelayUs(1);
temp |= KeyIO << 4;
// save all 16 keys' status in 2 bytes, 1 indicates key pressed