Add ps2_usart.c and fix set_led at USB wake
This commit is contained in:
tmk
parent
9d26053f1c
commit
532e100450
@ -148,7 +148,6 @@ static void Console_Task(void)
|
||||
*/
|
||||
void EVENT_USB_Device_Connect(void)
|
||||
{
|
||||
led_set(0x1f); // all on
|
||||
}
|
||||
|
||||
void EVENT_USB_Device_Disconnect(void)
|
||||
@ -172,8 +171,9 @@ void EVENT_USB_Device_WakeUp()
|
||||
|
||||
#ifdef SLEEP_LED_ENABLE
|
||||
sleep_led_disable();
|
||||
#endif
|
||||
// NOTE: converters may not accept this
|
||||
led_set(host_keyboard_leds());
|
||||
#endif
|
||||
}
|
||||
|
||||
void EVENT_USB_Device_StartOfFrame(void)
|
||||
|
||||
@ -662,8 +662,9 @@ ISR(USB_GEN_vect)
|
||||
suspend_wakeup_init();
|
||||
#ifdef SLEEP_LED_ENABLE
|
||||
sleep_led_disable();
|
||||
#endif
|
||||
// NOTE: converters may not accept this
|
||||
led_set(host_keyboard_leds());
|
||||
#endif
|
||||
|
||||
UDIEN |= (1<<SUSPE);
|
||||
UDIEN &= ~(1<<WAKEUPE);
|
||||
|
||||
@ -70,11 +70,13 @@ POSSIBILITY OF SUCH DAMAGE.
|
||||
#define PS2_RESEND 0xFE
|
||||
#define PS2_SET_LED 0xED
|
||||
|
||||
// TODO: error numbers
|
||||
#define PS2_ERR_NONE 0
|
||||
#define PS2_ERR_STARTBIT1 1
|
||||
#define PS2_ERR_STARTBIT2 2
|
||||
#define PS2_ERR_STARTBIT3 3
|
||||
#define PS2_ERR_PARITY 0x10
|
||||
#define PS2_ERR_NODATA 0x20
|
||||
|
||||
#define PS2_LED_SCROLL_LOCK 0
|
||||
#define PS2_LED_NUM_LOCK 1
|
||||
|
||||
@ -36,26 +36,9 @@ POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
/*
|
||||
Primitive PS/2 Library for AVR
|
||||
==============================
|
||||
Host side is only supported now.
|
||||
Synchronous USART is used to receive data by hardware process
|
||||
rather than interrupt. During V-USB interrupt runs, CLOCK interrupt
|
||||
cannot interpose. In the result it is prone to lost CLOCK edge.
|
||||
* PS/2 protocol USART version
|
||||
*/
|
||||
|
||||
|
||||
I/O control
|
||||
-----------
|
||||
High state is asserted by internal pull-up.
|
||||
If you have a signaling problem, you may need to have
|
||||
external pull-up resisters on CLOCK and DATA line.
|
||||
|
||||
|
||||
PS/2 References
|
||||
---------------
|
||||
http://www.computer-engineering.org/ps2protocol/
|
||||
http://www.mcamafia.de/pdf/ibm_hitrc07.pdf
|
||||
*/
|
||||
#include <stdbool.h>
|
||||
#include <avr/io.h>
|
||||
#include <avr/interrupt.h>
|
||||
@ -75,18 +58,6 @@ http://www.mcamafia.de/pdf/ibm_hitrc07.pdf
|
||||
uint8_t ps2_error = PS2_ERR_NONE;
|
||||
|
||||
|
||||
static inline void clock_lo(void);
|
||||
static inline void clock_hi(void);
|
||||
static inline bool clock_in(void);
|
||||
static inline void data_lo(void);
|
||||
static inline void data_hi(void);
|
||||
static inline bool data_in(void);
|
||||
static inline uint16_t wait_clock_lo(uint16_t us);
|
||||
static inline uint16_t wait_clock_hi(uint16_t us);
|
||||
static inline uint16_t wait_data_lo(uint16_t us);
|
||||
static inline uint16_t wait_data_hi(uint16_t us);
|
||||
static inline void idle(void);
|
||||
static inline void inhibit(void);
|
||||
static inline uint8_t pbuf_dequeue(void);
|
||||
static inline void pbuf_enqueue(uint8_t data);
|
||||
static inline bool pbuf_has_data(void);
|
||||
@ -95,14 +66,15 @@ static inline void pbuf_clear(void);
|
||||
|
||||
void ps2_host_init(void)
|
||||
{
|
||||
idle();
|
||||
idle(); // without this many USART errors occur when cable is disconnected
|
||||
PS2_USART_INIT();
|
||||
PS2_USART_RX_INT_ON();
|
||||
// POR(150-2000ms) plus BAT(300-500ms) may take 2.5sec([3]p.20)
|
||||
//_delay_ms(2500);
|
||||
}
|
||||
|
||||
uint8_t ps2_host_send(uint8_t data)
|
||||
{
|
||||
uint8_t res = 0;
|
||||
bool parity = true;
|
||||
ps2_error = PS2_ERR_NONE;
|
||||
|
||||
@ -144,20 +116,22 @@ uint8_t ps2_host_send(uint8_t data)
|
||||
WAIT(clock_hi, 50, 8);
|
||||
WAIT(data_hi, 50, 9);
|
||||
|
||||
idle();
|
||||
PS2_USART_INIT();
|
||||
PS2_USART_RX_INT_ON();
|
||||
res = ps2_host_recv_response();
|
||||
return ps2_host_recv_response();
|
||||
ERROR:
|
||||
idle();
|
||||
PS2_USART_INIT();
|
||||
PS2_USART_RX_INT_ON();
|
||||
return res;
|
||||
return 0;
|
||||
}
|
||||
|
||||
// Do polling data from keyboard to get response to last command.
|
||||
uint8_t ps2_host_recv_response(void)
|
||||
{
|
||||
while (!pbuf_has_data()) {
|
||||
uint8_t retry = 25;
|
||||
while (retry-- && !pbuf_has_data()) {
|
||||
_delay_ms(1); // without this delay it seems to fall into deadlock
|
||||
}
|
||||
return pbuf_dequeue();
|
||||
@ -165,106 +139,32 @@ uint8_t ps2_host_recv_response(void)
|
||||
|
||||
uint8_t ps2_host_recv(void)
|
||||
{
|
||||
return pbuf_dequeue();
|
||||
if (pbuf_has_data()) {
|
||||
ps2_error = PS2_ERR_NONE;
|
||||
return pbuf_dequeue();
|
||||
} else {
|
||||
ps2_error = PS2_ERR_NODATA;
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
ISR(PS2_USART_RX_VECT)
|
||||
{
|
||||
uint8_t error = PS2_USART_ERROR;
|
||||
// TODO: request RESEND when error occurs?
|
||||
uint8_t error = PS2_USART_ERROR; // USART error should be read before data
|
||||
uint8_t data = PS2_USART_RX_DATA;
|
||||
if (!error) {
|
||||
pbuf_enqueue(data);
|
||||
} else {
|
||||
xprintf("PS2 USART error: %02X data: %02X\n", error, data);
|
||||
}
|
||||
}
|
||||
|
||||
/* send LED state to keyboard */
|
||||
void ps2_host_set_led(uint8_t led)
|
||||
{
|
||||
// send 0xED then keyboard keeps waiting for next LED data
|
||||
// and keyboard does not send any scan codes during waiting.
|
||||
// If fail to send LED data keyboard looks like being freezed.
|
||||
uint8_t retry = 3;
|
||||
while (retry-- && ps2_host_send(PS2_SET_LED) != PS2_ACK)
|
||||
;
|
||||
retry = 3;
|
||||
while (retry-- && ps2_host_send(led) != PS2_ACK)
|
||||
;
|
||||
}
|
||||
|
||||
|
||||
/*--------------------------------------------------------------------
|
||||
* static functions
|
||||
*------------------------------------------------------------------*/
|
||||
static inline void clock_lo()
|
||||
{
|
||||
PS2_CLOCK_PORT &= ~(1<<PS2_CLOCK_BIT);
|
||||
PS2_CLOCK_DDR |= (1<<PS2_CLOCK_BIT);
|
||||
}
|
||||
static inline void clock_hi()
|
||||
{
|
||||
/* input with pull up */
|
||||
PS2_CLOCK_DDR &= ~(1<<PS2_CLOCK_BIT);
|
||||
PS2_CLOCK_PORT |= (1<<PS2_CLOCK_BIT);
|
||||
}
|
||||
static inline bool clock_in()
|
||||
{
|
||||
PS2_CLOCK_DDR &= ~(1<<PS2_CLOCK_BIT);
|
||||
PS2_CLOCK_PORT |= (1<<PS2_CLOCK_BIT);
|
||||
_delay_us(1);
|
||||
return PS2_CLOCK_PIN&(1<<PS2_CLOCK_BIT);
|
||||
}
|
||||
static inline void data_lo()
|
||||
{
|
||||
PS2_DATA_PORT &= ~(1<<PS2_DATA_BIT);
|
||||
PS2_DATA_DDR |= (1<<PS2_DATA_BIT);
|
||||
}
|
||||
static inline void data_hi()
|
||||
{
|
||||
/* input with pull up */
|
||||
PS2_DATA_DDR &= ~(1<<PS2_DATA_BIT);
|
||||
PS2_DATA_PORT |= (1<<PS2_DATA_BIT);
|
||||
}
|
||||
static inline bool data_in()
|
||||
{
|
||||
PS2_DATA_DDR &= ~(1<<PS2_DATA_BIT);
|
||||
PS2_DATA_PORT |= (1<<PS2_DATA_BIT);
|
||||
_delay_us(1);
|
||||
return PS2_DATA_PIN&(1<<PS2_DATA_BIT);
|
||||
}
|
||||
|
||||
static inline uint16_t wait_clock_lo(uint16_t us)
|
||||
{
|
||||
while (clock_in() && us) { asm(""); _delay_us(1); us--; }
|
||||
return us;
|
||||
}
|
||||
static inline uint16_t wait_clock_hi(uint16_t us)
|
||||
{
|
||||
while (!clock_in() && us) { asm(""); _delay_us(1); us--; }
|
||||
return us;
|
||||
}
|
||||
static inline uint16_t wait_data_lo(uint16_t us)
|
||||
{
|
||||
while (data_in() && us) { asm(""); _delay_us(1); us--; }
|
||||
return us;
|
||||
}
|
||||
static inline uint16_t wait_data_hi(uint16_t us)
|
||||
{
|
||||
while (!data_in() && us) { asm(""); _delay_us(1); us--; }
|
||||
return us;
|
||||
}
|
||||
|
||||
/* idle state that device can send */
|
||||
static inline void idle(void)
|
||||
{
|
||||
clock_hi();
|
||||
data_hi();
|
||||
}
|
||||
|
||||
/* inhibit device to send */
|
||||
static inline void inhibit(void)
|
||||
{
|
||||
clock_lo();
|
||||
data_hi();
|
||||
ps2_host_send(0xED);
|
||||
ps2_host_send(led);
|
||||
}
|
||||
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user