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#include <stdio.h>
#include <stdint.h>
#include <stddef.h>
#include <string.h>
#include <freertos/FreeRTOS.h>
#include <freertos/task.h>
#include <freertos/semphr.h>
// #include <freertos/heap_regions.h>
#include <esp_system.h>
#include <esp_event.h>
#include <esp_event_loop.h>
#include <esp_log.h>
#include <esp_err.h>
#include <esp_heap_caps.h>
#include <driver/spi_slave.h>
#include "msgq.h"
#include "transport.h"
#include "fe310.h"
static EOSMsgQ send_q;
static EOSMsgItem send_q_array[EOS_FE310_SIZE_Q];
#define SPI_GPIO_RTS 4
#define SPI_GPIO_CTS 2
#define SPI_GPIO_MOSI 23
#define SPI_GPIO_MISO 19
#define SPI_GPIO_SCLK 18
#define SPI_GPIO_CS 5
static SemaphoreHandle_t mutex;
static const char *TAG = "EOS";
static eos_fe310_fptr_t cmd_handler[EOS_FE310_MAX_CMD];
static void bad_handler(unsigned char cmd, unsigned char *buffer, uint16_t len) {
ESP_LOGI(TAG, "FE310 RECV: bad handler: %d", cmd);
}
static void worker(void *pvParameters) {
int repeat = 0;
esp_err_t ret;
unsigned char cmd = 0;
unsigned char *buffer;
uint16_t len;
unsigned char *buf_send = heap_caps_malloc(EOS_FE310_SIZE_BUF, MALLOC_CAP_DMA);
unsigned char *buf_recv = heap_caps_malloc(EOS_FE310_SIZE_BUF, MALLOC_CAP_DMA);
spi_slave_transaction_t t;
memset(&t, 0, sizeof(t));
t.length = EOS_FE310_SIZE_BUF*8;
t.tx_buffer = buf_send;
t.rx_buffer = buf_recv;
xSemaphoreTake(mutex, portMAX_DELAY);
for (;;) {
if (!repeat) {
eos_msgq_pop(&send_q, &cmd, &buffer, &len);
if (cmd) {
buf_send[0] = ((cmd << 3) | (len >> 8)) & 0xFF;
buf_send[1] = len & 0xFF;
if (buffer) memcpy(buf_send + 2, buffer, len);
} else {
WRITE_PERI_REG(GPIO_OUT_W1TC_REG, (1 << SPI_GPIO_RTS));
buf_send[0] = 0;
buf_send[1] = 0;
}
}
memset(buf_recv, 0, EOS_FE310_SIZE_BUF);
ret = spi_slave_transmit(HSPI_HOST, &t, portMAX_DELAY);
repeat = 0;
if (buf_recv[0] != 0) {
xSemaphoreGive(mutex);
cmd = (buf_recv[0] >> 3);
len = ((buf_recv[0] & 0x07) << 8);
len |= buf_recv[1];
buffer = buf_recv + 2;
if (cmd & EOS_FE310_CMD_FLAG_ONEW) {
cmd &= ~EOS_FE310_CMD_FLAG_ONEW;
if (buf_send[0]) repeat = 1;
}
if (cmd < EOS_FE310_MAX_CMD) {
cmd_handler[cmd](cmd, buffer, len);
} else {
bad_handler(cmd, buffer, len);
}
xSemaphoreTake(mutex, portMAX_DELAY);
} else {
ESP_LOGI(TAG, "FE310 RECV NULL");
}
// vTaskDelay(5000 / portTICK_PERIOD_MS);
}
xSemaphoreGive(mutex);
}
// Called after a transaction is queued and ready for pickup by master. We use this to set the handshake line high.
static void _post_setup_cb(spi_slave_transaction_t *trans) {
xSemaphoreGive(mutex);
WRITE_PERI_REG(GPIO_OUT_W1TS_REG, (1 << SPI_GPIO_CTS));
}
// Called after transaction is sent/received. We use this to set the handshake line low.
static void _post_trans_cb(spi_slave_transaction_t *trans) {
xSemaphoreTake(mutex, portMAX_DELAY);
WRITE_PERI_REG(GPIO_OUT_W1TC_REG, (1 << SPI_GPIO_CTS));
}
void eos_fe310_init(void) {
esp_err_t ret;
// Configuration for the handshake lines
gpio_config_t io_conf;
io_conf.intr_type = GPIO_INTR_DISABLE;
io_conf.mode = GPIO_MODE_OUTPUT;
io_conf.pin_bit_mask = (1 << SPI_GPIO_CTS);
gpio_config(&io_conf);
WRITE_PERI_REG(GPIO_OUT_W1TC_REG, (1 << SPI_GPIO_CTS));
io_conf.intr_type = GPIO_INTR_DISABLE;
io_conf.mode = GPIO_MODE_OUTPUT;
io_conf.pin_bit_mask = (1 << SPI_GPIO_RTS);
gpio_config(&io_conf);
WRITE_PERI_REG(GPIO_OUT_W1TC_REG, (1 << SPI_GPIO_RTS));
//Configuration for the SPI bus
spi_bus_config_t buscfg = {
.mosi_io_num = SPI_GPIO_MOSI,
.miso_io_num = SPI_GPIO_MISO,
.sclk_io_num = SPI_GPIO_SCLK
};
//Configuration for the SPI slave interface
spi_slave_interface_config_t slvcfg = {
.mode = 0,
.spics_io_num = SPI_GPIO_CS,
.queue_size = 2,
.flags = 0,
.post_setup_cb = _post_setup_cb,
.post_trans_cb = _post_trans_cb
};
//Enable pull-ups on SPI lines so we don't detect rogue pulses when no master is connected.
gpio_set_pull_mode(SPI_GPIO_MOSI, GPIO_PULLUP_ONLY);
gpio_set_pull_mode(SPI_GPIO_SCLK, GPIO_PULLUP_ONLY);
gpio_set_pull_mode(SPI_GPIO_CS, GPIO_PULLUP_ONLY);
int i;
for (i=0; i<EOS_FE310_MAX_CMD; i++) {
cmd_handler[i] = bad_handler;
}
//Initialize SPI slave interface
ret=spi_slave_initialize(HSPI_HOST, &buscfg, &slvcfg, 1);
assert(ret==ESP_OK);
eos_msgq_init(&send_q, send_q_array, EOS_FE310_SIZE_Q);
mutex = xSemaphoreCreateMutex();
xTaskCreate(&worker, "fe310_receiver", 4096, NULL, 5, NULL);
}
int eos_fe310_send(unsigned char cmd, unsigned char *buffer, uint16_t len) {
xSemaphoreTake(mutex, portMAX_DELAY);
WRITE_PERI_REG(GPIO_OUT_W1TS_REG, (1 << SPI_GPIO_RTS));
int rv = eos_msgq_push(&send_q, cmd, buffer, len);
xSemaphoreGive(mutex);
return rv;
}
void eos_fe310_set_handler(unsigned char cmd, eos_fe310_fptr_t handler) {
cmd_handler[cmd] = handler;
}
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