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quack
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more ADB hakinck

This commit is contained in:
demik 2021-04-01 20:58:23 +02:00
parent b2a5a28290
commit f7da75d6a1
3 changed files with 55 additions and 42 deletions
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84
main/adb.c
View File

@ -27,6 +27,7 @@
#include "sdkconfig.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_log.h"
#include "esp_system.h"
#include "esp_spi_flash.h"
#include "driver/rmt.h"
@ -36,7 +37,7 @@
#include "gpio.h"
/* globals */
rmt_config_t adb_rmt_rx;
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;
/* static defines */
@ -53,8 +54,14 @@ void adb_init(void) {
gpio_set_level(GPIO_ADB, 1);
adb_tx_reset();
/* init RMT driver for ADB RX */
adb_rmt_rx = RMT_DEFAULT_CONFIG_RX(GPIO_ADB, RMT_RX_CHANNEL);
/* avoir console flood when installing/uninstalling RMT driver */
esp_log_level_set("intr_alloc", ESP_LOG_INFO);
/* init RMT RX driver with default values for ADB */
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;
rmt_config(&adb_rmt_rx);
/* If jumper is set, switch to ADB host mode */
if (gpio_get_level(GPIO_ADBSRC) == 0)
@ -68,16 +75,15 @@ void adb_task_host(void *pvParameters) {
if (gpio_get_level(GPIO_BTOFF) == 0)
xTaskNotify(t_green, LED_ON, eSetValueWithOverwrite);
ESP_LOGI("ADB", "ADB host started");
/* 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));
while (1) {
vTaskDelay(20 / portTICK_PERIOD_MS);
adb_tx_cmd(ADB_MOUSE|ADB_TALK|ADB_REG0);
if (adb_rx_tlt()) {
data = adb_rx_mouse();
xTaskNotify(t_yellow, LED_ONCE, eSetValueWithOverwrite);
}
data = adb_rx_mouse();
}
}
@ -85,40 +91,34 @@ void adb_task_mouse(void *pvParameters) {
}
static uint16_t adb_rx_mouse() {
return 0;
int dur( uint32_t level, uint32_t duration ) {
if ( level == 0 ) { return duration; }
else { return -1.0 * duration; }
}
static inline bool adb_rx_tlt() {
/*
* Stop-to-start time aka Tlt in some docs. This is called after a command packet
* The start bit has to appear between 140µs and 260µs
*
* return flase if no start bit detected
* return true if start bit detected
*/
static uint16_t adb_rx_mouse() {
RingbufHandle_t rb = NULL;
rmt_item32_t* items = NULL;
size_t rx_size = 0;
size_t i;
char i;
rmt_get_ringbuf_handle(RMT_RX_CHANNEL, &rb);
assert(rb != NULL);
rmt_rx_start(RMT_RX_CHANNEL, true);
items = (rmt_item32_t*) xRingbufferReceive(rb, &rx_size, pdMS_TO_TICKS(10));
printf( ">>> %i\n", rx_size);
rmt_rx_stop(RMT_RX_CHANNEL);
/* wait 130µs then start polling */
ets_delay_us(130);
for (i = 0; i < 130; i++) {
if (gpio_get_level(GPIO_ADB) == 0) {
/* start bit found. wait for the end of it */
ets_delay_us(99-2);
return true;
}
ets_delay_us(1);
if (rx_size > (1 * sizeof(rmt_item32_t)))
xTaskNotify(t_yellow, LED_ONCE, eSetValueWithOverwrite);
else
return 0;
for (i = 0; i < (rx_size / sizeof(rmt_item32_t)); i++) {
printf("%d:%dus %d:%dus\n", (items+i)->level0, (items+i)->duration0, (items+i)->level1, (items+i)->duration1);
}
vRingbufferReturnItem(rb, (void*) items);
/*
* actually we wait more than 260µs because calling ets_delay_us takes
* a little more than 1µs to call. Depending on scheduling, the wait times is
* between 390µS and 650µs which is way past specs.
*/
return false;
return 0;
}
static inline void adb_tx_as() {
@ -131,6 +131,7 @@ static inline void adb_tx_as() {
void adb_tx_cmd(unsigned char cmd) {
gpio_set_direction(GPIO_ADB, GPIO_MODE_OUTPUT);
adb_tx_as();
/* send actual byte (unrolled loop) */
@ -146,14 +147,15 @@ void adb_tx_cmd(unsigned char cmd) {
/* stop bit */
adb_tx_zero();
gpio_set_direction(GPIO_ADB, GPIO_MODE_INPUT);
gpio_set_pull_mode(GPIO_ADB, GPIO_PULLUP_ONLY);
}
static inline void adb_tx_one() {
/* values from AN591 Datasheet minus the estimated call to ets_delay_us */
gpio_set_level(GPIO_ADB, 0);
ets_delay_us(35-1);
ets_delay_us(ADB_1_LOW - 1);
gpio_set_level(GPIO_ADB, 1);
ets_delay_us(65-1);
ets_delay_us(ADB_1_HIGH - 1);
}
void adb_tx_reset() {
@ -164,7 +166,7 @@ void adb_tx_reset() {
*/
gpio_set_level(GPIO_ADB, 0);
ets_delay_us(3000);
ets_delay_us(ADB_RESET);
gpio_set_level(GPIO_ADB, 1);
ets_delay_us(500);
}
@ -172,7 +174,7 @@ void adb_tx_reset() {
static inline void adb_tx_zero() {
/* values from AN591 Datasheet minus the estimated call to ets_delay_us */
gpio_set_level(GPIO_ADB, 0);
ets_delay_us(65-1);
ets_delay_us(ADB_0_LOW - 1);
gpio_set_level(GPIO_ADB, 1);
ets_delay_us(35-1);
ets_delay_us(ADB_0_HIGH - 1);
}

9
main/adb.h
View File

@ -34,12 +34,21 @@ void adb_tx_cmd(unsigned char cmd);
void adb_tx_reset(void);
/* defines */
#define RMT_RX_CHANNEL RMT_CHANNEL_0
#define tskADB_PRIORITY 4
/* ADB timers */
#define ADB_RESET 3000
#define ADB_0_LOW 65
#define ADB_0_HIGH 35
#define ADB_1_LOW 35
#define ADB_1_HIGH 65
/* ADB commands values from 00591b.pdf page 16-17 */
#define ADB_MOUSE (3<<4)
#define ADB_TALK 0xC
#define ADB_LISTEN 0x8
#define ADB_REG0 0x0
#define ADB_REG3 0x3
#endif

4
main/gpio.c
View File

@ -54,7 +54,7 @@ void gpio_init(void) {
gpio_set_direction(GPIO_BTOFF, GPIO_MODE_INPUT);
/* ADB */
gpio_set_direction(GPIO_ADB, GPIO_MODE_OUTPUT);
gpio_set_direction(GPIO_ADB, GPIO_MODE_INPUT);
/* Quadrature mouse */
gpio_reset_pin(GPIO_CLICK);
@ -74,6 +74,8 @@ void gpio_init(void) {
gpio_set_direction(GPIO_QY2, GPIO_MODE_OUTPUT);
gpio_set_level(GPIO_CLICK, 1);
gpio_set_level(GPIO_QY1, 1);
gpio_set_level(GPIO_QY2, 1);
}
void gpio_output_disable(void) {