PS/2: request to resend when error is occured.
This commit is contained in:
tmk
parent
3015f191a5
commit
239bdbf419
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@ -106,6 +106,7 @@ void keyboard_proc(void)
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return;
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}
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// TODO: should send only when changed from last report
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if (matrix_is_modified()) {
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host_send_keyboard_report();
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#ifdef DEBUG_LED
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123
ps2.c
123
ps2.c
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@ -96,13 +96,15 @@ void ps2_host_init(void)
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#endif
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}
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// TODO: send using interrupt if available
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uint8_t ps2_host_send(uint8_t data)
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{
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bool parity;
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RETRY:
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parity = true;
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ps2_error = 0;
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uint8_t res = 0;
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bool parity = true;
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ps2_error = PS2_ERR_NONE;
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#ifdef PS2_INT_DISABLE
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PS2_INT_DISABLE();
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#endif
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/* terminate a transmission if we have */
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inhibit();
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_delay_us(100);
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@ -139,15 +141,15 @@ RETRY:
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WAIT(clock_hi, 50, 8);
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WAIT(data_hi, 50, 9);
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uint8_t res = ps2_host_recv_response();
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if (res == 0xFE && data != 0xFE)
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goto RETRY;
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inhibit();
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return res;
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res = ps2_host_recv_response();
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ERROR:
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#ifdef PS2_INT_ENABLE
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PS2_INT_ENABLE();
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idle();
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#else
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inhibit();
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return 0;
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#endif
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return res;
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}
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/* receive data when host want else inhibit communication */
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@ -209,46 +211,99 @@ static inline uint8_t pbuf_dequeue(void)
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/* get data received by interrupt */
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uint8_t ps2_host_recv(void)
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{
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// TODO: release clock line after 100us when inhibited by error
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if (ps2_error) {
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ps2_host_send(0xFE); // request to resend
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ps2_error = PS2_ERR_NONE;
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}
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return pbuf_dequeue();
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}
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#define DEBUGP_INIT() do { DDRC = 0xFF; } while (0)
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#define DEBUGP(x) do { PORTC = x; } while (0)
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ISR(PS2_INT_VECT)
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{
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/* interrupt means start bit comes */
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pbuf_enqueue(recv_data());
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static enum {
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INIT,
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START,
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BIT0, BIT1, BIT2, BIT3, BIT4, BIT5, BIT6, BIT7,
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PARITY,
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STOP,
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} state = INIT;
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static uint8_t data = 0;
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static uint8_t parity = 1;
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/* release lines(idle state) */
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idle();
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_delay_us(5);
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// TODO: abort if elapse 100us from previous interrupt
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// return unless falling edge
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if (clock_in()) {
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goto RETURN;
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}
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state++;
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DEBUGP(state);
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switch (state) {
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case START:
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if (data_in())
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goto ERROR;
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break;
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case BIT0:
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case BIT1:
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case BIT2:
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case BIT3:
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case BIT4:
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case BIT5:
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case BIT6:
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case BIT7:
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data >>= 1;
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if (data_in()) {
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data |= 0x80;
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parity++;
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}
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break;
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case PARITY:
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if (data_in()) {
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if (!(parity & 0x01))
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goto ERROR;
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} else {
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if (parity & 0x01)
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goto ERROR;
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}
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break;
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case STOP:
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if (!data_in())
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goto ERROR;
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pbuf_enqueue(data);
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goto DONE;
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break;
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default:
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goto ERROR;
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}
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goto RETURN;
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ERROR:
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DEBUGP(0xFF);
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inhibit();
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ps2_error = state;
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DONE:
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state = INIT;
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data = 0;
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parity = 1;
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RETURN:
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return;
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}
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#endif
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/*
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static void ps2_reset(void)
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{
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ps2_host_send(0xFF);
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if (ps2_host_recv_response() == 0xFA) {
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_delay_ms(1000);
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ps2_host_recv_response();
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}
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}
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*/
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/* send LED state to keyboard */
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void ps2_host_set_led(uint8_t led)
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{
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#ifdef PS2_INT_DISABLE
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PS2_INT_DISABLE();
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#endif
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ps2_host_send(0xED);
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ps2_host_recv_response();
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ps2_host_send(led);
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ps2_host_recv_response();
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#ifdef PS2_INT_ENABLE
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PS2_INT_ENABLE();
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idle();
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#endif
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}
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@ -257,7 +312,7 @@ static uint8_t recv_data(void)
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{
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uint8_t data = 0;
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bool parity = true;
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ps2_error = 0;
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ps2_error = PS2_ERR_NONE;
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/* start bit [1] */
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WAIT(clock_lo, 1, 1);
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@ -307,6 +362,7 @@ static inline bool clock_in()
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{
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PS2_CLOCK_DDR &= ~(1<<PS2_CLOCK_BIT);
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PS2_CLOCK_PORT |= (1<<PS2_CLOCK_BIT);
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_delay_us(1);
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return PS2_CLOCK_PIN&(1<<PS2_CLOCK_BIT);
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}
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static inline void data_lo()
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@ -324,6 +380,7 @@ static inline bool data_in()
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{
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PS2_DATA_DDR &= ~(1<<PS2_DATA_BIT);
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PS2_DATA_PORT |= (1<<PS2_DATA_BIT);
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_delay_us(1);
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return PS2_DATA_PIN&(1<<PS2_DATA_BIT);
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}
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@ -49,7 +49,7 @@ int main(void)
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usbInit();
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print_enable = true;
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//debug_enable = true;
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debug_enable = true;
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keyboard_init();
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/* enforce re-enumeration, do this while interrupts are disabled! */
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@ -64,56 +64,9 @@ int main(void)
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//uint8_t fn_bits = 0;
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while (1) { /* main event loop */
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DEBUGP(0x01);
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wdt_reset();
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usbPoll();
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host_vusb_keyboard_send();
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DEBUGP(0x02);
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keyboard_proc();
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DEBUGP(0x03);
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/*
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matrix_scan();
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fn_bits = 0;
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host_swap_keyboard_report();
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host_clear_keyboard_report();
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mousekey_clear_report();
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for (int row = 0; row < matrix_rows(); row++) {
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for (int col = 0; col < matrix_cols(); col++) {
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if (!matrix_is_on(row, col)) continue;
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uint8_t code = layer_get_keycode(row, col);
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if (code == KB_NO) {
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// do nothing
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}
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else if (IS_MOD(code)) {
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host_add_mod_bit(MOD_BIT(code));
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}
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else if (IS_KEY(code)) {
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host_add_key(code);
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}
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else if (IS_FN(code)) {
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fn_bits |= FN_BIT(code);
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}
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else if (IS_MOUSEKEY(code)) {
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mousekey_decode(code);
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}
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else {
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debug("ignore keycode: "); debug_hex(code); debug("\n");
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}
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}
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}
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DEBUGP(0x03);
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layer_switching(fn_bits);
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if (matrix_is_modified()) {
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host_send_keyboard_report();
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}
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mousekey_send();
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if (last_led != host_keyboard_led()) {
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led_set(host_keyboard_led());
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last_led = host_keyboard_led();
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}
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*/
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host_vusb_keyboard_send();
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}
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}
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28
vusb/host.c
28
vusb/host.c
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@ -258,33 +258,6 @@ PROGMEM uchar keyboard_hid_report[] = {
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*/
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PROGMEM uchar mouse_hid_report[] = {
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/* from HID 1.11 spec example */
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0x05, 0x01, // Usage Page (Generic Desktop),
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0x09, 0x02, // Usage (Mouse),
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0xA1, 0x01, // Collection (Application),
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0x09, 0x01, // Usage (Pointer),
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0xA1, 0x00, // Collection (Physical),
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0x05, 0x09, // Usage Page (Buttons),
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0x19, 0x01, // Usage Minimum (01),
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0x29, 0x03, // Usage Maximun (03),
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0x15, 0x00, // Logical Minimum (0),
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0x25, 0x01, // Logical Maximum (1),
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0x95, 0x03, // Report Count (3),
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0x75, 0x01, // Report Size (1),
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0x81, 0x02, // Input (Data, Variable, Absolute), ;3 button bits
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0x95, 0x01, // Report Count (1),
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0x75, 0x05, // Report Size (5),
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0x81, 0x01, // Input (Constant), ;5 bit padding
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0x05, 0x01, // Usage Page (Generic Desktop),
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0x09, 0x30, // Usage (X),
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0x09, 0x31, // Usage (Y),
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0x15, 0x81, // Logical Minimum (-127),
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0x25, 0x7F, // Logical Maximum (127),
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0x75, 0x08, // Report Size (8),
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0x95, 0x02, // Report Count (2),
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0x81, 0x06, // Input (Data, Variable, Relative), ;2 position bytes (X & Y)
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0xC0, // End Collection,
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0xC0, // End Collection
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/*
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0x05, 0x01, // USAGE_PAGE (Generic Desktop)
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0x09, 0x02, // USAGE (Mouse)
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0xa1, 0x01, // COLLECTION (Application)
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@ -355,7 +328,6 @@ PROGMEM uchar mouse_hid_report[] = {
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0xc0, // END_COLLECTION
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0xc0, // END_COLLECTION
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0xc0 // END_COLLECTION
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*/
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};
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