diff options
Diffstat (limited to 'code/esp32/components/eos/net.c')
| -rw-r--r-- | code/esp32/components/eos/net.c | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/code/esp32/components/eos/net.c b/code/esp32/components/eos/net.c new file mode 100644 index 0000000..9a4a024 --- /dev/null +++ b/code/esp32/components/eos/net.c @@ -0,0 +1,285 @@ +#include <stdlib.h> +#include <stdint.h> +#include <string.h> + +#include <freertos/FreeRTOS.h> +#include <freertos/semphr.h> +#include <freertos/task.h> + +#include <esp_system.h> +#include <esp_log.h> +#include <esp_err.h> +#include <esp_heap_caps.h> +#include <driver/gpio.h> +#include <driver/spi_slave.h> + +#include "eos.h" +#include "msgq.h" +#include "power.h" +#include "net.h" + +#define SPI_GPIO_RTS 22 +#define SPI_GPIO_CTS 21 +#define SPI_GPIO_MOSI 23 +#define SPI_GPIO_MISO 19 +#define SPI_GPIO_SCLK 18 +#define SPI_GPIO_CS 5 + +#define SPI_SIZE_BUF (EOS_NET_SIZE_BUF + 8) + +static volatile char net_sleep = 0; + +static EOSBufQ net_buf_q; +static unsigned char *net_bufq_array[EOS_NET_SIZE_BUFQ]; + +static EOSMsgQ net_send_q; +static EOSMsgItem net_sndq_array[EOS_NET_SIZE_SNDQ]; + +static SemaphoreHandle_t mutex; +static SemaphoreHandle_t semaph; +static TaskHandle_t net_xchg_task_handle; +static const char *TAG = "EOS NET"; + +static eos_net_fptr_t mtype_handler[EOS_NET_MAX_MTYPE]; + +static void bad_handler(unsigned char mtype, unsigned char *buffer, uint16_t len) { + ESP_LOGE(TAG, "bad handler: %d len: %d", mtype, len); +} + +// 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) { + gpio_set_level(SPI_GPIO_CTS, 1); +} + +// 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) { + gpio_set_level(SPI_GPIO_CTS, 0); +} + +static void net_xchg_task(void *pvParameters) { + int repeat = 0; + int wake = 0; + unsigned char mtype = 0; + unsigned char *buffer; + uint16_t len; + uint8_t flags; + unsigned char *buf_send = heap_caps_malloc(SPI_SIZE_BUF, MALLOC_CAP_DMA); + unsigned char *buf_recv = heap_caps_malloc(SPI_SIZE_BUF, MALLOC_CAP_DMA); + esp_err_t ret; + spi_slave_transaction_t spi_tr; + + //Configuration for the SPI bus + spi_bus_config_t spi_bus_cfg = { + .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 spi_slave_cfg = { + .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 + }; + + //Initialize SPI slave interface + ret = spi_slave_initialize(VSPI_HOST, &spi_bus_cfg, &spi_slave_cfg, 1); + assert(ret == ESP_OK); + + memset(&spi_tr, 0, sizeof(spi_tr)); + spi_tr.length = SPI_SIZE_BUF * 8; + spi_tr.tx_buffer = buf_send; + spi_tr.rx_buffer = buf_recv; + + if (eos_power_wakeup_cause()) { + wake = 1; + repeat = 1; + } + + eos_power_wait4init(); + while (1) { + if (!repeat) { + xSemaphoreTake(mutex, portMAX_DELAY); + + eos_msgq_pop(&net_send_q, &mtype, &buffer, &len, &flags); + if (mtype) { + buf_send[0] = mtype; + buf_send[1] = len >> 8; + buf_send[2] = len & 0xFF; + if (buffer) { + memcpy(buf_send + 3, buffer, len); + if (flags & EOS_NET_FLAG_BFREE) { + free(buffer); + } else { + eos_bufq_push(&net_buf_q, buffer); + xSemaphoreGive(semaph); + } + } + } else { + gpio_set_level(SPI_GPIO_RTS, 0); + buf_send[0] = 0; + buf_send[1] = 0; + buf_send[2] = 0; + } + + xSemaphoreGive(mutex); + } + repeat = 0; + + buf_recv[0] = 0; + buf_recv[1] = 0; + buf_recv[2] = 0; + spi_slave_transmit(VSPI_HOST, &spi_tr, portMAX_DELAY); + ESP_LOGD(TAG, "RECV:%d", buf_recv[0]); + + if (wake) { + eos_power_net_ready(); + wake = 0; + } + if (buf_recv[0] == 0x00) continue; + if (buf_recv[0] == 0xFF) { // Sleep req + if (buf_send[0] == 0) { + int abort = 0; + + xSemaphoreTake(mutex, portMAX_DELAY); + net_sleep = 1; + if (eos_msgq_len(&net_send_q)) abort = 1; + xSemaphoreGive(mutex); + + spi_slave_free(VSPI_HOST); + + eos_power_sleep(); + if (abort) eos_power_wake(EOS_PWR_WAKE_MSG); + + vTaskSuspend(NULL); + + xSemaphoreTake(mutex, portMAX_DELAY); + net_sleep = 0; + xSemaphoreGive(mutex); + + spi_slave_initialize(VSPI_HOST, &spi_bus_cfg, &spi_slave_cfg, 1); + wake = 1; + repeat = 1; + } + continue; + } + mtype = buf_recv[0]; + len = (uint16_t)buf_recv[1] << 8; + len |= (uint16_t)buf_recv[2] & 0xFF; + buffer = buf_recv + 3; + if (mtype & EOS_NET_MTYPE_FLAG_ONEW) { + mtype &= ~EOS_NET_MTYPE_FLAG_ONEW; + if (buf_send[0]) repeat = 1; + } + if (mtype <= EOS_NET_MAX_MTYPE) { + mtype_handler[mtype-1](mtype, buffer, len); + } else { + bad_handler(mtype, buffer, len); + } + } + vTaskDelete(NULL); +} + +void eos_net_init(void) { + int i; + + // 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.pull_up_en = 0; + io_conf.pull_down_en = 0; + io_conf.pin_bit_mask = ((uint64_t)1 << SPI_GPIO_CTS); + gpio_config(&io_conf); + gpio_set_level(SPI_GPIO_CTS, 0); + + io_conf.intr_type = GPIO_INTR_DISABLE; + io_conf.mode = GPIO_MODE_OUTPUT; + io_conf.pull_up_en = 0; + io_conf.pull_down_en = 0; + io_conf.pin_bit_mask = ((uint64_t)1 << SPI_GPIO_RTS); + gpio_config(&io_conf); + gpio_set_level(SPI_GPIO_RTS, 0); + + eos_msgq_init(&net_send_q, net_sndq_array, EOS_NET_SIZE_SNDQ); + eos_bufq_init(&net_buf_q, net_bufq_array, EOS_NET_SIZE_BUFQ); + for (i=0; i<EOS_NET_SIZE_BUFQ; i++) { + eos_bufq_push(&net_buf_q, malloc(EOS_NET_SIZE_BUF)); + } + + for (i=0; i<EOS_NET_MAX_MTYPE; i++) { + mtype_handler[i] = bad_handler; + } + + semaph = xSemaphoreCreateCounting(EOS_NET_SIZE_BUFQ, EOS_NET_SIZE_BUFQ); + mutex = xSemaphoreCreateBinary(); + xSemaphoreGive(mutex); + xTaskCreate(&net_xchg_task, "net_xchg", EOS_TASK_SSIZE_NET_XCHG, NULL, EOS_TASK_PRIORITY_NET_XCHG, &net_xchg_task_handle); + ESP_LOGI(TAG, "INIT"); +} + +unsigned char *eos_net_alloc(void) { + unsigned char *ret; + + xSemaphoreTake(semaph, portMAX_DELAY); + xSemaphoreTake(mutex, portMAX_DELAY); + ret = eos_bufq_pop(&net_buf_q); + xSemaphoreGive(mutex); + + return ret; +} + +void eos_net_free(unsigned char *buf) { + xSemaphoreTake(mutex, portMAX_DELAY); + eos_bufq_push(&net_buf_q, buf); + xSemaphoreGive(semaph); + xSemaphoreGive(mutex); +} + +int eos_net_send(unsigned char mtype, unsigned char *buffer, uint16_t len, uint8_t flags) { + int rv, sleep; + + if (flags & EOS_NET_FLAG_BCOPY) xSemaphoreTake(semaph, portMAX_DELAY); + xSemaphoreTake(mutex, portMAX_DELAY); + sleep = net_sleep; + gpio_set_level(SPI_GPIO_RTS, 1); + if (flags & EOS_NET_FLAG_BCOPY) { + unsigned char *b = eos_bufq_pop(&net_buf_q); + memcpy(b, buffer, len); + buffer = b; + } + rv = eos_msgq_push(&net_send_q, mtype, buffer, len, flags); + xSemaphoreGive(mutex); + + if (sleep) eos_power_wake(EOS_PWR_WAKE_MSG); + + return rv; +} + +void eos_net_set_handler(unsigned char mtype, eos_net_fptr_t handler) { + mtype_handler[mtype-1] = handler; +} + +void eos_net_sleep_done(uint8_t mode) { + gpio_set_level(SPI_GPIO_CTS, 1); + vTaskDelay(200 / portTICK_PERIOD_MS); + gpio_set_level(SPI_GPIO_CTS, 0); +} + +void eos_net_wake(uint8_t source, uint8_t mode) { + int sleep; + + if (mode == EOS_PWR_SMODE_DEEP) return; + do { + vTaskResume(net_xchg_task_handle); + vTaskDelay(10 / portTICK_PERIOD_MS); + + xSemaphoreTake(mutex, portMAX_DELAY); + sleep = net_sleep; + xSemaphoreGive(mutex); + } while (sleep); +} |