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added ADB Mouse HotPlug management

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This commit is contained in:
demik 2021-05-09 20:45:22 +02:00
parent af205f720e
commit cfb8ea3ebe
3 changed files with 154 additions and 16 deletions
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2
main/CMakeLists.txt
View File

@ -1,4 +1,4 @@
set(srcs "adb.c"
set(srcs "adb.c"
"blue.c"
"esp_hid_gap.c"
"gpio.c"

146
main/adb.c
View File

@ -36,6 +36,9 @@
#include "led.h"
#include "gpio.h"
/* defines */
#define TAG "ADB"
/* globals */
rmt_config_t adb_rmt_rx = RMT_DEFAULT_CONFIG_RX(GPIO_ADB, RMT_RX_CHANNEL);
extern TaskHandle_t t_green, t_blue, t_yellow, t_red;
@ -48,7 +51,6 @@ static bool adb_rx_isstop(rmt_item32_t cell);
static bool adb_rx_iszero(rmt_item32_t cell);
static uint16_t IRAM_ATTR adb_rx_mouse();
static void adb_rx_setup(void);
static bool adb_rx_tlt(void);
static void adb_tx_as(void);
static void adb_tx_one(void);
static void adb_tx_setup(void);
@ -67,7 +69,7 @@ static void adb_handle_button(bool action) {
if (status == ADB_B_DOWN && action == ADB_B_UP) {
xTaskNotify(t_click, 0, eSetValueWithOverwrite);
status = ADB_B_UP;
ESP_LOGD("ADB", "button released");
ESP_LOGD(TAG, "button released");
return ;
}
@ -75,7 +77,7 @@ static void adb_handle_button(bool action) {
if (status == ADB_B_UP && action == ADB_B_DOWN) {
xTaskNotify(t_click, 1, eSetValueWithOverwrite);
status = ADB_B_DOWN;
ESP_LOGD("ADB", "button pressed");
ESP_LOGD(TAG, "button pressed");
return ;
}
}
@ -89,6 +91,7 @@ void adb_init(void) {
esp_log_level_set("intr_alloc", ESP_LOG_INFO);
/* init RMT RX driver with default values for ADB */
adb_rmt_rx.mem_block_num = 2;
adb_rmt_rx.rx_config.filter_en = true;
adb_rmt_rx.rx_config.filter_ticks_thresh = 10;
adb_rmt_rx.rx_config.idle_threshold = 100;
@ -101,15 +104,72 @@ void adb_init(void) {
xTaskCreatePinnedToCore(adb_task_mouse, "ADB_MOUSE", 6 * 1024, NULL, tskADB_PRIORITY, NULL, 1);
}
/*
* Probe ADB mouse. Also switch the mouse to a better mode if avaible
*
* 1. check if there is someting at address $3, if not: retry
* 2. try to switch to CLASSIC2 protocol at temporary address $9
* 3. if CLASSIC2 is successfull, move device back to $3
*/
void adb_probe(void) {
uint16_t register3;
ESP_LOGI(TAG, "Probing for mouse...");
xTaskNotify(t_yellow, LED_SLOW, eSetValueWithOverwrite);
/* for some reason, RMT misses the first exchange sometimes. Flush the device should give it time */
adb_tx_cmd(ADB_MOUSE|ADB_FLUSH);
adb_rx_mouse();
vTaskDelay(12 / portTICK_PERIOD_MS);
while (true) {
adb_tx_cmd(ADB_MOUSE|ADB_TALK|ADB_REG3);
register3 = adb_rx_mouse();
ESP_LOGD("ADB", "Device $3 register3: %x", register3);
if ((register3 & ADB_H_ALL) == ADB_H_C100) {
ESP_LOGI(TAG, "... detected mouse at $3");
break;
}
vTaskDelay(500 / portTICK_PERIOD_MS);
}
/* try to switch to 200cpi mode. (0x6000) == Exceptional event + Service request enable */
vTaskDelay(7 / portTICK_PERIOD_MS);
if ((register3 & ADB_H_ALL) == ADB_H_C100) {
adb_tx_listen(ADB_MOUSE|ADB_LISTEN|ADB_REG3, 0x6000|(ADB_MOUSE<<4)|ADB_H_C200);
vTaskDelay(7 / portTICK_PERIOD_MS);
adb_tx_cmd(ADB_MOUSE|ADB_TALK|ADB_REG3);
register3 = adb_rx_mouse();
}
switch (register3 & ADB_H_ALL) {
case ADB_H_C100:
ESP_LOGD(TAG, "Mouse running at 100cpi");
break;
case ADB_H_C200:
ESP_LOGD(TAG, "Mouse running at 200cpi");
break;
default:
ESP_LOGE(TAG, "Mouse running with unknow handler: %x", register3 & ADB_H_ALL);
}
xTaskNotify(t_yellow, LED_OFF, eSetValueWithOverwrite);
}
void adb_task_host(void *pvParameters) {
/* Classic Apple Mouse Protocol is 16 bits long */
uint16_t data;
uint8_t last = 0;
int8_t move = 0;
uint8_t state = ADB_S_PROBE;
/* put green led to steady if BT is disabled. Otherwise BT init will do it */
if (gpio_get_level(GPIO_BTOFF) == 0)
xTaskNotify(t_green, LED_ON, eSetValueWithOverwrite);
ESP_LOGI("ADB", "host started");
xTaskNotify(t_green, LED_ON, eSetValueWithOverwrite);
ESP_LOGI(TAG, "host started on core %d", xPortGetCoreID());
/* poll the mouse like a maniac. It will answer only if there is user input */
ESP_ERROR_CHECK(rmt_driver_install(RMT_RX_CHANNEL, 200, 0));
@ -117,10 +177,19 @@ void adb_task_host(void *pvParameters) {
while (true) {
/* Should give us a polling rate between 80-90 Hz */
vTaskDelay(7 / portTICK_PERIOD_MS);
if (state == ADB_S_PROBE) {
adb_probe();
state = ADM_S_POLL;
continue;
}
adb_tx_cmd(ADB_MOUSE|ADB_TALK|ADB_REG0);
data = adb_rx_mouse();
if (data) {
last = 0;
/* click is active low */
if (! (data & ADB_CMP_B1) || (! (data & ADB_CMP_B2)))
adb_handle_button(ADB_B_DOWN);
@ -128,7 +197,7 @@ void adb_task_host(void *pvParameters) {
adb_handle_button(ADB_B_UP);
/* cast negative signed 7 bits to signed 8 bits */
move = (data & ADB_CMD_MX) >> 0;
move = (data & ADB_CMP_MX) >> 0;
if (move & 0x40) {
move &= ~0x40;
move |= 0x80;
@ -138,7 +207,7 @@ void adb_task_host(void *pvParameters) {
if (move)
xTaskNotify(t_qx, move, eSetValueWithOverwrite);
move = (data & ADB_CMD_MY) >> 8;
move = (data & ADB_CMP_MY) >> 8;
if (move & 0x40) {
move &= ~0x40;
move |= 0x80;
@ -148,11 +217,25 @@ void adb_task_host(void *pvParameters) {
if (move)
xTaskNotify(t_qy, move, eSetValueWithOverwrite);
}
else {
last++;
if (last == 0xff) {
adb_tx_cmd(ADB_MOUSE|ADB_TALK|ADB_REG3);
data = adb_rx_mouse();
if (!data) {
if (state == ADB_S_KEEP)
state = ADB_S_PROBE;
else
state = ADB_S_KEEP;
}
ESP_LOGD("ADB", "Check mouse presence %x", data);
}
}
}
}
void adb_task_mouse(void *pvParameters) {
ESP_LOGI("ADB", "ADB mouse started");
ESP_LOGI(TAG, "mouse started on core %d", xPortGetCoreID());
vTaskSuspend(NULL);
}
@ -193,7 +276,7 @@ static uint16_t IRAM_ATTR adb_rx_mouse() {
size_t i;
rmt_get_ringbuf_handle(RMT_RX_CHANNEL, &rb);
assert(rb != NULL);
configASSERT(rb != NULL);
rmt_rx_start(RMT_RX_CHANNEL, true);
items = (rmt_item32_t*)xRingbufferReceive(rb, &rx_size, pdMS_TO_TICKS(8));
rmt_rx_stop(RMT_RX_CHANNEL);
@ -212,11 +295,14 @@ static uint16_t IRAM_ATTR adb_rx_mouse() {
switch (rx_size) {
case 0:
return 0;
case 4:
/* single glitch, go timeout */
return 0;
case 72:
xTaskNotify(t_yellow, LED_ONCE, eSetValueWithOverwrite);
break;
default:
ESP_LOGD("ADB", "wrong size of %i bit(s)", rx_size / sizeof(rmt_item32_t));
ESP_LOGD(TAG, "wrong size of %i bit(s)", rx_size / sizeof(rmt_item32_t));
xTaskNotify(t_red, LED_ONCE, eSetValueWithOverwrite);
}
@ -261,11 +347,11 @@ static inline void adb_tx_as() {
ets_delay_us(80-1);
}
void adb_tx_cmd(unsigned char cmd) {
void IRAM_ATTR adb_tx_cmd(unsigned char cmd) {
adb_tx_setup();
adb_tx_as();
/* send actual byte (unrolled loop) */
/* send command byte (unrolled loop) */
cmd & 0x80 ? adb_tx_one() : adb_tx_zero();
cmd & 0x40 ? adb_tx_one() : adb_tx_zero();
cmd & 0x20 ? adb_tx_one() : adb_tx_zero();
@ -280,6 +366,42 @@ void adb_tx_cmd(unsigned char cmd) {
adb_rx_setup();
}
void IRAM_ATTR adb_tx_data(uint16_t data) {
adb_tx_setup();
adb_tx_one();
/* send data 2 bytes (unrolled loop) */
data & 0x8000 ? adb_tx_one() : adb_tx_zero();
data & 0x4000 ? adb_tx_one() : adb_tx_zero();
data & 0x2000 ? adb_tx_one() : adb_tx_zero();
data & 0x1000 ? adb_tx_one() : adb_tx_zero();
data & 0x800 ? adb_tx_one() : adb_tx_zero();
data & 0x400 ? adb_tx_one() : adb_tx_zero();
data & 0x200 ? adb_tx_one() : adb_tx_zero();
data & 0x100 ? adb_tx_one() : adb_tx_zero();
data & 0x80 ? adb_tx_one() : adb_tx_zero();
data & 0x40 ? adb_tx_one() : adb_tx_zero();
data & 0x20 ? adb_tx_one() : adb_tx_zero();
data & 0x10 ? adb_tx_one() : adb_tx_zero();
data & 0x08 ? adb_tx_one() : adb_tx_zero();
data & 0x04 ? adb_tx_one() : adb_tx_zero();
data & 0x02 ? adb_tx_one() : adb_tx_zero();
data & 0x01 ? adb_tx_one() : adb_tx_zero();
/* stop bit */
adb_tx_zero();
adb_rx_setup();
}
void adb_tx_listen(unsigned char cmd, uint16_t data) {
adb_tx_cmd(cmd);
/* Stop to start is between 160-240µS. Go for around 160 + time for GPIO setup */
ets_delay_us(160);
adb_tx_data(data);
}
static inline void adb_tx_one() {
/* values from AN591 Datasheet minus the estimated call to ets_delay_us */
gpio_set_level(GPIO_ADB, 0);

22
main/adb.h
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@ -31,6 +31,8 @@ void adb_task_host(void *pvParameters);
void adb_task_mouse(void *pvParameters);
void adb_tx_cmd(unsigned char cmd);
void adb_tx_data(uint16_t data);
void adb_tx_listen(unsigned char cmd, uint16_t data);
void adb_tx_reset(void);
/* defines */
@ -47,18 +49,32 @@ void adb_tx_reset(void);
/* Classic Apple Mouse Protocol bitmasks */
#define ADB_CMP_B1 (1<<15)
#define ADB_CMP_B2 (1<<7)
#define ADB_CMD_MX (127<<0)
#define ADB_CMD_MY (127<<8)
#define ADB_CMP_MX (127<<0)
#define ADB_CMP_MY (127<<8)
/* ADB commands values from 00591b.pdf page 16-17 */
#define ADB_MOUSE (3<<4)
#define ADB_TALK 0xC
#define ADB_LISTEN 0x8
#define ADB_FLUSH 0x1
#define ADB_REG0 0x0
#define ADB_REG3 0x3
/* Device addresses */
#define ADB_MOUSE (3<<4)
#define ADB_TMP (9<<4)
/* Various stuff */
#define ADB_B_UP 0
#define ADB_B_DOWN 1
#define ADB_H_ALL 0xff // Handlers bitmask
#define ADB_H_C100 0x01 // Handler 1 (Classic @ 100cpi)
#define ADB_H_C200 0x02 // Handler 2 (Classic @ 200cpi)
#define ADB_H_MOVE 0xfe // Move to another address
/* Host states */
#define ADB_S_PROBE 0x00
#define ADM_S_POLL 0x01
#define ADB_S_KEEP 0x08
#endif