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Basic GPIO expander using the ESP32 I2S peripheral (#12959)

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This commit is contained in:
Simon Jouet 2019-02-10 11:40:31 +00:00 committed by Scott Lahteine
parent 3983cacbcf
commit 5cd0fa3ce1
10 changed files with 412 additions and 41 deletions
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2
Marlin/src/HAL/HAL_ESP32/HAL.cpp
View file

@ -85,6 +85,8 @@ void HAL_init(void) {
#if ENABLED(WIFISUPPORT)
OTA_init();
#endif
i2s_init();
}
void HAL_idletask(void) {

3
Marlin/src/HAL/HAL_ESP32/HAL.h
View file

@ -31,7 +31,7 @@
#include <stdint.h>
#undef DISABLED
#undef _BV
#undef M_PI
#include <Arduino.h>
@ -43,6 +43,7 @@
#include "fastio_ESP32.h"
#include "watchdog_ESP32.h"
#include "i2s.h"
#include "HAL_timers_ESP32.h"

2
Marlin/src/HAL/HAL_ESP32/HAL_timers_ESP32.cpp
View file

@ -113,7 +113,7 @@ void HAL_timer_start(const uint8_t timer_num, uint32_t frequency) {
const tTimerConfig timer = TimerConfig[timer_num];
timer_config_t config;
config.divider = STEPPER_TIMER_PRESCALE;
config.divider = timer.divider;
config.counter_dir = TIMER_COUNT_UP;
config.counter_en = TIMER_PAUSE;
config.alarm_en = TIMER_ALARM_EN;

12
Marlin/src/HAL/HAL_ESP32/HAL_timers_ESP32.h
View file

@ -43,9 +43,15 @@ typedef uint64_t hal_timer_t;
#define HAL_TIMER_RATE APB_CLK_FREQ // frequency of timer peripherals
#define STEPPER_TIMER_PRESCALE 40
#define STEPPER_TIMER_RATE (HAL_TIMER_RATE / STEPPER_TIMER_PRESCALE) // frequency of stepper timer, 2MHz
#define STEPPER_TIMER_TICKS_PER_US ((STEPPER_TIMER_RATE) / 1000000) // stepper timer ticks per µs
#if ENABLED(I2S_STEPPER_STREAM)
#define STEPPER_TIMER_PRESCALE 1
#define STEPPER_TIMER_RATE 250000 // 250khz, 4us pulses of i2s word clock
#define STEPPER_TIMER_TICKS_PER_US ((STEPPER_TIMER_RATE) / 1000000) // stepper timer ticks per µs // wrong would be 0.25
#else
#define STEPPER_TIMER_PRESCALE 40
#define STEPPER_TIMER_RATE (HAL_TIMER_RATE / STEPPER_TIMER_PRESCALE) // frequency of stepper timer, 2MHz
#define STEPPER_TIMER_TICKS_PER_US ((STEPPER_TIMER_RATE) / 1000000) // stepper timer ticks per µs
#endif
#define STEP_TIMER_MIN_INTERVAL 8 // minimum time in µs between stepper interrupts

18
Marlin/src/HAL/HAL_ESP32/fastio_ESP32.h
View file

@ -21,38 +21,40 @@
*/
#pragma once
#include "i2s.h"
/**
* Utility functions
*/
// set pin as input
// Set pin as input
#define _SET_INPUT(IO) pinMode(IO, INPUT)
// set pin as output
// Set pin as output
#define _SET_OUTPUT(IO) pinMode(IO, OUTPUT)
// set pin as input with pullup mode
// Set pin as input with pullup mode
#define _PULLUP(IO, v) pinMode(IO, v ? INPUT_PULLUP : INPUT)
// Read a pin wrapper
#define READ(IO) digitalRead(IO)
// Write to a pin wrapper
#define WRITE(IO, v) digitalWrite(IO, v)
#define WRITE(IO, v) (TEST(IO, 7) ? i2s_write(IO & 0x7F, v) : digitalWrite(IO, v))
// set pin as input wrapper
// Set pin as input wrapper
#define SET_INPUT(IO) _SET_INPUT(IO)
// set pin as input with pullup wrapper
// Set pin as input with pullup wrapper
#define SET_INPUT_PULLUP(IO) do{ _SET_INPUT(IO); _PULLUP(IO, HIGH); }while(0)
// set pin as output wrapper
// Set pin as output wrapper
#define SET_OUTPUT(IO) do{ _SET_OUTPUT(IO); WRITE(IO, LOW); }while(0)
#define OUT_WRITE(IO,V) do{ _SET_OUTPUT(IO); WRITE(IO,V); }while(0)
//
// ports and functions
// Ports and functions
//
// UART

322
Marlin/src/HAL/HAL_ESP32/i2s.cpp Normal file
View file

@ -0,0 +1,322 @@
/**
* Marlin 3D Printer Firmware
* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifdef ARDUINO_ARCH_ESP32
#include <Arduino.h> // replace that with the proper imports
#include "i2s.h"
#include "../../core/macros.h"
#include "driver/periph_ctrl.h"
#include "rom/lldesc.h"
#include "soc/i2s_struct.h"
#include "freertos/queue.h"
#include "../../module/stepper.h"
#define DMA_BUF_COUNT 8 // number of DMA buffers to store data
#define DMA_BUF_LEN 4092 // maximum size in bytes
#define I2S_SAMPLE_SIZE 4 // 4 bytes, 32 bits per sample
#define DMA_SAMPLE_COUNT DMA_BUF_LEN / I2S_SAMPLE_SIZE // number of samples per buffer
typedef enum {
I2S_NUM_0 = 0x0, /*!< I2S 0*/
I2S_NUM_1 = 0x1, /*!< I2S 1*/
I2S_NUM_MAX,
} i2s_port_t;
typedef struct {
uint32_t **buffers;
uint32_t *current;
uint32_t rw_pos;
lldesc_t **desc;
xQueueHandle queue;
} i2s_dma_t;
static portMUX_TYPE i2s_spinlock[I2S_NUM_MAX] = {portMUX_INITIALIZER_UNLOCKED, portMUX_INITIALIZER_UNLOCKED};
static i2s_dev_t* I2S[I2S_NUM_MAX] = {&I2S0, &I2S1};
static i2s_dma_t dma;
// output value
uint32_t i2s_port_data;
#define I2S_ENTER_CRITICAL() portENTER_CRITICAL(&i2s_spinlock[i2s_num])
#define I2S_EXIT_CRITICAL() portEXIT_CRITICAL(&i2s_spinlock[i2s_num])
static inline void gpio_matrix_out_check(uint32_t gpio, uint32_t signal_idx, bool out_inv, bool oen_inv) {
//if pin = -1, do not need to configure
if (gpio != -1) {
PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[gpio], PIN_FUNC_GPIO);
gpio_set_direction((gpio_num_t)gpio, (gpio_mode_t)GPIO_MODE_DEF_OUTPUT);
gpio_matrix_out(gpio, signal_idx, out_inv, oen_inv);
}
}
static esp_err_t i2s_reset_fifo(i2s_port_t i2s_num) {
I2S_ENTER_CRITICAL();
I2S[i2s_num]->conf.rx_fifo_reset = 1;
I2S[i2s_num]->conf.rx_fifo_reset = 0;
I2S[i2s_num]->conf.tx_fifo_reset = 1;
I2S[i2s_num]->conf.tx_fifo_reset = 0;
I2S_EXIT_CRITICAL();
return ESP_OK;
}
esp_err_t i2s_start(i2s_port_t i2s_num) {
//start DMA link
I2S_ENTER_CRITICAL();
i2s_reset_fifo(i2s_num);
//reset dma
I2S[i2s_num]->lc_conf.in_rst = 1;
I2S[i2s_num]->lc_conf.in_rst = 0;
I2S[i2s_num]->lc_conf.out_rst = 1;
I2S[i2s_num]->lc_conf.out_rst = 0;
I2S[i2s_num]->conf.tx_reset = 1;
I2S[i2s_num]->conf.tx_reset = 0;
I2S[i2s_num]->conf.rx_reset = 1;
I2S[i2s_num]->conf.rx_reset = 0;
I2S[i2s_num]->int_clr.val = 0xFFFFFFFF;
I2S[i2s_num]->out_link.start = 1;
I2S[i2s_num]->conf.tx_start = 1;
I2S_EXIT_CRITICAL();
return ESP_OK;
}
esp_err_t i2s_stop(i2s_port_t i2s_num) {
I2S_ENTER_CRITICAL();
I2S[i2s_num]->out_link.stop = 1;
I2S[i2s_num]->conf.tx_start = 0;
I2S[i2s_num]->int_clr.val = I2S[i2s_num]->int_st.val; //clear pending interrupt
I2S_EXIT_CRITICAL();
return ESP_OK;
}
static void IRAM_ATTR i2s_intr_handler_default(void *arg) {
int dummy;
lldesc_t *finish_desc;
portBASE_TYPE high_priority_task_awoken = pdFALSE;
if (I2S0.int_st.out_eof) {
// Get the descriptor of the last item in the linkedlist
finish_desc = (lldesc_t*) I2S0.out_eof_des_addr;
// If the queue is full it's because we have an underflow,
// more than buf_count isr without new data, remove the front buffer
if (xQueueIsQueueFullFromISR(dma.queue))
xQueueReceiveFromISR(dma.queue, &dummy, &high_priority_task_awoken);
xQueueSendFromISR(dma.queue, (void *)(&finish_desc->buf), &high_priority_task_awoken);
}
if (high_priority_task_awoken == pdTRUE) portYIELD_FROM_ISR();
// clear interrupt
I2S0.int_clr.val = I2S0.int_st.val; //clear pending interrupt
}
void stepperTask(void* parameter) {
uint32_t i, remaining = 0;
while (1) {
xQueueReceive(dma.queue, &dma.current, portMAX_DELAY);
dma.rw_pos = 0;
for (i = 0; i < DMA_SAMPLE_COUNT; i++) {
// Fill with the port data post pulse_phase until the next step
if (remaining) {
i2s_push_sample();
remaining--;
}
else {
Stepper::stepper_pulse_phase_isr();
remaining = Stepper::stepper_block_phase_isr();
}
}
}
}
int i2s_init() {
periph_module_enable(PERIPH_I2S0_MODULE);
/**
* Each i2s transfer will take
* fpll = PLL_D2_CLK -- clka_en = 0
*
* fi2s = fpll / N + b/a -- N = clkm_div_num
* fi2s = 160MHz / 2
* fi2s = 80MHz
*
* fbclk = fi2s / M -- M = tx_bck_div_num
* fbclk = 80MHz / 2
* fbclk = 40MHz
*
* fwclk = fbclk / 32
*
* for fwclk = 250kHz (4uS pulse time)
* N = 10
* M = 20
*/
// Allocate the array of pointers to the buffers
dma.buffers = (uint32_t **)malloc(sizeof(uint32_t*) * DMA_BUF_COUNT);
if (dma.buffers == NULL) return -1;
// Allocate each buffer that can be used by the DMA controller
for (int buf_idx = 0; buf_idx < DMA_BUF_COUNT; buf_idx++) {
dma.buffers[buf_idx] = (uint32_t*) heap_caps_calloc(1, DMA_BUF_LEN, MALLOC_CAP_DMA);
if (dma.buffers[buf_idx] == NULL) return -1;
}
// Allocate the array of DMA descriptors
dma.desc = (lldesc_t**) malloc(sizeof(lldesc_t*) * DMA_BUF_COUNT);
if (dma.desc == NULL) return -1;
// Allocate each DMA descriptor that will be used by the DMA controller
for (int buf_idx = 0; buf_idx < DMA_BUF_COUNT; buf_idx++) {
dma.desc[buf_idx] = (lldesc_t*) heap_caps_malloc(sizeof(lldesc_t), MALLOC_CAP_DMA);
if (dma.desc[buf_idx] == NULL) return -1;
}
// Initialize
for (int buf_idx = 0; buf_idx < DMA_BUF_COUNT; buf_idx++) {
dma.desc[buf_idx]->owner = 1;
dma.desc[buf_idx]->eof = 1; // set to 1 will trigger the interrupt
dma.desc[buf_idx]->sosf = 0;
dma.desc[buf_idx]->length = DMA_BUF_LEN;
dma.desc[buf_idx]->size = DMA_BUF_LEN;
dma.desc[buf_idx]->buf = (uint8_t *) dma.buffers[buf_idx];
dma.desc[buf_idx]->offset = 0;
dma.desc[buf_idx]->empty = (uint32_t)((buf_idx < (DMA_BUF_COUNT - 1)) ? (dma.desc[buf_idx + 1]) : dma.desc[0]);
}
dma.queue = xQueueCreate(DMA_BUF_COUNT, sizeof(uint32_t *));
// Set the first DMA descriptor
I2S0.out_link.addr = (uint32_t)dma.desc[0];
// stop i2s
i2s_stop(I2S_NUM_0);
// configure I2S data port interface.
i2s_reset_fifo(I2S_NUM_0);
//reset i2s
I2S0.conf.tx_reset = 1;
I2S0.conf.tx_reset = 0;
I2S0.conf.rx_reset = 1;
I2S0.conf.rx_reset = 0;
//reset dma
I2S0.lc_conf.in_rst = 1;
I2S0.lc_conf.in_rst = 0;
I2S0.lc_conf.out_rst = 1;
I2S0.lc_conf.out_rst = 0;
//Enable and configure DMA
I2S0.lc_conf.check_owner = 0;
I2S0.lc_conf.out_loop_test = 0;
I2S0.lc_conf.out_auto_wrback = 0;
I2S0.lc_conf.out_data_burst_en = 0;
I2S0.lc_conf.outdscr_burst_en = 0;
I2S0.lc_conf.out_no_restart_clr = 0;
I2S0.lc_conf.indscr_burst_en = 0;
I2S0.lc_conf.out_eof_mode = 1;
I2S0.conf2.lcd_en = 0;
I2S0.conf2.camera_en = 0;
I2S0.pdm_conf.pcm2pdm_conv_en = 0;
I2S0.pdm_conf.pdm2pcm_conv_en = 0;
I2S0.fifo_conf.dscr_en = 0;
I2S0.conf_chan.tx_chan_mod = 0;
I2S0.fifo_conf.tx_fifo_mod = 0;
I2S0.conf.tx_mono = 0;
I2S0.conf_chan.rx_chan_mod = 0;
I2S0.fifo_conf.rx_fifo_mod = 0;
I2S0.conf.rx_mono = 0;
I2S0.fifo_conf.dscr_en = 1; //connect dma to fifo
I2S0.conf.tx_start = 0;
I2S0.conf.rx_start = 0;
I2S0.conf.tx_msb_right = 1;
I2S0.conf.tx_right_first = 1;
I2S0.conf.tx_slave_mod = 0; // Master
I2S0.fifo_conf.tx_fifo_mod_force_en = 1;
I2S0.pdm_conf.rx_pdm_en = 0;
I2S0.pdm_conf.tx_pdm_en = 0;
I2S0.conf.tx_short_sync = 0;
I2S0.conf.rx_short_sync = 0;
I2S0.conf.tx_msb_shift = 0;
I2S0.conf.rx_msb_shift = 0;
// set clock
I2S0.clkm_conf.clka_en = 0; // Use PLL/2 as reference
I2S0.clkm_conf.clkm_div_num = 10; // minimum value of 2, reset value of 4, max 256
I2S0.clkm_conf.clkm_div_a = 0; // 0 at reset, what about divide by 0? (not an issue)
I2S0.clkm_conf.clkm_div_b = 0; // 0 at reset
// fbck = fi2s / tx_bck_div_num
I2S0.sample_rate_conf.tx_bck_div_num = 2; // minimum value of 2 defaults to 6
// Enable TX interrupts
I2S0.int_ena.out_eof = 1;
I2S0.int_ena.out_dscr_err = 0;
I2S0.int_ena.out_total_eof = 0;
I2S0.int_ena.out_done = 0;
// Allocate and Enable the I2S interrupt
intr_handle_t i2s_isr_handle;
esp_intr_alloc(ETS_I2S0_INTR_SOURCE, 0, i2s_intr_handler_default, NULL, &i2s_isr_handle);
esp_intr_enable(i2s_isr_handle);
// Create the task that will feed the buffer
xTaskCreate(stepperTask, "StepperTask", 10000, NULL, 1, NULL);
// Route the i2s pins to the appropriate GPIO
gpio_matrix_out_check(22, I2S0O_DATA_OUT23_IDX, 0, 0);
gpio_matrix_out_check(25, I2S0O_WS_OUT_IDX, 0, 0);
gpio_matrix_out_check(26, I2S0O_BCK_OUT_IDX, 0, 0);
// Start the I2S peripheral
return i2s_start(I2S_NUM_0);
}
void i2s_write(uint8_t pin, uint8_t val) {
SET_BIT_TO(i2s_port_data, pin, val);
}
void i2s_push_sample() {
dma.current[dma.rw_pos++] = i2s_port_data;
}
#endif // ARDUINO_ARCH_ESP32

31
Marlin/src/HAL/HAL_ESP32/i2s.h Normal file
View file

@ -0,0 +1,31 @@
/**
* Marlin 3D Printer Firmware
* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#pragma once
// current value of the outputs provided over i2s
extern uint32_t i2s_port_data;
int i2s_init();
void i2s_write(uint8_t pin, uint8_t val);
void i2s_push_sample();

14
Marlin/src/module/stepper.cpp
View file

@ -1474,7 +1474,12 @@ void Stepper::stepper_pulse_phase_isr() {
#endif
#endif
#if MINIMUM_STEPPER_PULSE
#if ENABLED(I2S_STEPPER_STREAM)
i2s_push_sample();
#endif
// TODO: need to deal with MINIMUM_STEPPER_PULSE over i2s
#if MINIMUM_STEPPER_PULSE && DISABLED(I2S_STEPPER_STREAM)
// Just wait for the requested pulse duration
while (HAL_timer_get_count(PULSE_TIMER_NUM) < pulse_end) { /* nada */ }
#endif
@ -2143,12 +2148,11 @@ void Stepper::init() {
E_AXIS_INIT(5);
#endif
// Init Stepper ISR to 122 Hz for quick starting
HAL_timer_start(STEP_TIMER_NUM, 122);
#if DISABLED(I2S_STEPPER_STREAM)
HAL_timer_start(STEP_TIMER_NUM, 122); // Init Stepper ISR to 122 Hz for quick starting
ENABLE_STEPPER_DRIVER_INTERRUPT();
sei();
#endif
// Init direction bits for first moves
last_direction_bits = 0

24
Marlin/src/pins/pins_ESP32.h
View file

@ -36,24 +36,24 @@
//
// Steppers
//
#define X_STEP_PIN 27
#define X_DIR_PIN 26
#define X_ENABLE_PIN 25
#define X_STEP_PIN 128
#define X_DIR_PIN 129
#define X_ENABLE_PIN 130
//#define X_CS_PIN 0
#define Y_STEP_PIN 33
#define Y_DIR_PIN 32
#define Y_ENABLE_PIN X_ENABLE_PIN
#define Y_STEP_PIN 131
#define Y_DIR_PIN 132
#define Y_ENABLE_PIN 133
//#define Y_CS_PIN 13
#define Z_STEP_PIN 14
#define Z_DIR_PIN 12
#define Z_ENABLE_PIN X_ENABLE_PIN
#define Z_STEP_PIN 134
#define Z_DIR_PIN 135
#define Z_ENABLE_PIN 136
//#define Z_CS_PIN 5 // SS_PIN
#define E0_STEP_PIN 16
#define E0_DIR_PIN 17
#define E0_ENABLE_PIN X_ENABLE_PIN
#define E0_STEP_PIN 137
#define E0_DIR_PIN 138
#define E0_ENABLE_PIN 139
//#define E0_CS_PIN 21
//

5
platformio.ini
View file

@ -356,7 +356,8 @@ lib_ignore =
platform = https://github.com/platformio/platform-espressif32.git#feature/stage
board = esp32dev
framework = arduino
upload_port = COM3
upload_speed = 115200
monitor_speed = 115200
lib_ignore =
LiquidCrystal_I2C
LiquidCrystal
@ -364,6 +365,8 @@ lib_ignore =
LiquidTWI2
TMC26XStepper
c1921b4
SailfishLCD
SailfishRGB_LED
src_filter = ${common.default_src_filter} +<src/HAL/HAL_ESP32>
#