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pimoroni-pico/drivers/esp32spi/spi_drv.hpp

248 wiersze
8.8 KiB
C++
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#pragma once
#include <stdio.h>
#include <string>
#include "pico/stdlib.h"
#include "hardware/spi.h"
//#define WARN(...) {printf(__VA_ARGS__);}
#define WARN(...) {}
#define PARAM_COUNT(params) sizeof(params) / sizeof(SpiDrv::inParam)
// Maximum size of a SSID
#define WL_SSID_MAX_LENGTH 32
// Length of passphrase. Valid lengths are 8-63.
#define WL_WPA_KEY_MAX_LENGTH 63
// Length of key in bytes. Valid values are 5 and 13.
#define WL_WEP_KEY_MAX_LENGTH 13
// Size of a MAC-address or BSSID
#define WL_MAC_ADDR_LENGTH 6
// Size of a IP address
#define WL_IPV4_LENGTH 4
// Maximum size of a SSID list
#define WL_NETWORKS_LIST_MAXNUM 10
#define IF_CHECK_START_CMD() \
if(!wait_for_byte(START_CMD)) { \
WARN("Error waiting START_CMD\n"); \
return false; \
} \
else \
#define CHECK_DATA(check, x) \
if(!read_and_check_byte(check, &x)) { \
WARN("Reply error\n"); \
return false; \
} \
else \
namespace pimoroni {
class SpiDrv {
//--------------------------------------------------
// Constants
//--------------------------------------------------
public:
static const uint8_t DEFAULT_CS_PIN = 7;
static const uint8_t DEFAULT_SCK_PIN = 18;
static const uint8_t DEFAULT_MOSI_PIN = 19;
static const uint8_t DEFAULT_MISO_PIN = 16;
static const uint8_t DEFAULT_RESETN_PIN = 11;
static const uint8_t DEFAULT_GPIO0_PIN = 2;
static const uint8_t DEFAULT_ACK_PIN = 10;
static const uint8_t DUMMY_DATA = 0xFF;
private:
static const uint8_t START_CMD = 0xE0;
static const uint8_t END_CMD = 0xEE;
static const uint8_t ERR_CMD = 0xEF;
static const uint8_t CMD_FLAG = 0;
static const uint8_t REPLY_FLAG = 1 << 7;
static const uint8_t DATA_FLAG = 0x40;
static const uint8_t CMD_POS = 1; // Position of Command OpCode on SPI stream
static const uint8_t PARAM_LEN_POS = 2; // Position of Param len on SPI stream
static const int BYTE_TIMEOUT = 5000;
static const int SELECT_ACK_TIMEOUT = 5000;
//--------------------------------------------------
// Enums
//--------------------------------------------------
public:
enum numParams : uint8_t {
PARAM_NUMS_0 = 0,
PARAM_NUMS_1,
PARAM_NUMS_2,
PARAM_NUMS_3,
PARAM_NUMS_4,
PARAM_NUMS_5
};
enum p_type : uint8_t {
PARAM_NORMAL,
PARAM_BUFFER,
PARAM_DUMMY,
};
enum cmd_response_type : uint8_t {
RESPONSE_TYPE_NORMAL,
RESPONSE_TYPE_CMD,
RESPONSE_TYPE_DATA8,
RESPONSE_TYPE_DATA16,
};
enum s_sleep_state : uint8_t {
AWAKE,
LIGHT_SLEEP,
DEEP_SLEEP
};
s_sleep_state sleep_state = AWAKE;
const char* commands[88] = {
// 0x00 -> 0x0f
"NULL", "NULL", "NULL", "NULL", "NULL", "NULL", "NULL", "NULL", "NULL", "NULL", "NULL", "NULL", "NULL", "NULL", "NULL", "NULL",
// 0x10 -> 0x1f
"setNet", "setPassPhrase", "setKey", "NULL", "setIPconfig", "setDNSconfig", "setHostname", "setPowerMode", "setApNet", "setApPassPhrase", "setDebug", "getTemperature", "NULL", "NULL", "NULL", "NULL",
// 0x20 -> 0x2f
"getConnStatus", "getIPaddr", "getMACaddr", "getCurrSSID", "getCurrBSSID", "getCurrRSSI", "getCurrEnct", "scanNetworks", "startServerTcp", "getStateTcp", "dataSentTcp", "availDataTcp", "getDataTcp", "startClientTcp", "stopClientTcp", "getClientStateTcp",
// 0x30 -> 0x3f
"disconnect", "NULL", "getIdxRSSI", "getIdxEnct", "reqHostByName", "getHostByName", "startScanNetworks", "getFwVersion", "NULL", "sendUDPdata", "getRemoteData", "getTime", "getIdxBSSID", "getIdxChannel", "ping", "getSocket",
// 0x40 -> 0x4f
"setClientCert", "setCertKey", "NULL", "NULL", "sendDataTcp", "getDataBufTcp", "insertDataBuf", "NULL", "NULL", "NULL", "wpa2EntSetIdentity", "wpa2EntSetUsername", "wpa2EntSetPassword", "wpa2EntSetCACert", "wpa2EntSetCertKey", "wpa2EntEnable",
// 0x50 -> 0x5f
"setPinMode", "setDigitalWrite", "setAnalogWrite", "setDigitalRead", "setAnalogRead", "setWakePin", "setLightSleep", "setDeepSleep"
};
//--------------------------------------------------
// Substructures
//--------------------------------------------------
public:
struct outParam {
uint8_t param_len;
uint8_t* param;
};
struct inParam {
const uint8_t *addr = nullptr;
const uint16_t len = 0;
const p_type type = PARAM_NORMAL;
};
//--------------------------------------------------
// Variables
//--------------------------------------------------
private:
spi_inst_t *spi = spi0;
int8_t cs = DEFAULT_CS_PIN;
int8_t sck = DEFAULT_SCK_PIN;
int8_t mosi = DEFAULT_MOSI_PIN;
int8_t miso = DEFAULT_MISO_PIN;
int8_t resetn = DEFAULT_RESETN_PIN;
int8_t gpio0 = DEFAULT_GPIO0_PIN;
int8_t ack = DEFAULT_ACK_PIN;
//--------------------------------------------------
// Constructors/Destructor
//--------------------------------------------------
public:
uint32_t command_length = 0;
SpiDrv() {}
SpiDrv(spi_inst_t *spi,
uint8_t cs, uint8_t sck, uint8_t mosi, uint8_t miso,
uint8_t resetn, uint8_t gpio0, uint8_t ack) :
spi(spi), cs(cs), sck(sck), mosi(mosi), miso(miso),
resetn(resetn), gpio0(gpio0), ack(ack) {}
//--------------------------------------------------
// Methods
//--------------------------------------------------
public:
void init();
void reset();
bool available();
void esp_select();
void esp_deselect();
bool get_esp_ready();
bool get_esp_ack();
bool wait_for_esp_ack(uint32_t timeout_ms=SELECT_ACK_TIMEOUT);
bool wait_for_esp_ready(uint32_t timeout_ms=SELECT_ACK_TIMEOUT);
bool wait_for_esp_select(uint32_t timeout_ms=SELECT_ACK_TIMEOUT);
int wait_for_byte(uint8_t wait_byte);
bool read_and_check_byte(uint8_t check_byte, uint8_t *byte_out);
uint8_t read_byte();
bool wait_response_params(uint8_t cmd, uint8_t num_param, outParam *params_out);
bool wait_response_cmd(uint8_t cmd, uint8_t num_param, uint8_t *param_out, uint16_t *param_len_out);
bool wait_response_data8(uint8_t cmd, uint8_t *param_out, uint16_t *param_len_out);
bool wait_response_data16(uint8_t cmd, uint8_t *param_out, uint16_t *param_len_out);
bool wait_response(uint8_t cmd, uint16_t *num_param_out, uint8_t **params_out, uint8_t max_num_params);
void send_param(const uint8_t* param, uint8_t param_len);
void send_param_len8(uint8_t param_len);
void send_param_len16(uint16_t param_len);
uint8_t read_param_len8(uint16_t *param_len_out = nullptr);
uint16_t read_param_len16(uint16_t *param_len_out = nullptr);
void send_buffer(const uint8_t *param, uint16_t param_len);
void start_cmd(uint8_t cmd, uint8_t num_param);
void end_cmd();
void pad_to_multiple_of_4(int command_size);
static inParam build_param(const std::string *param) {
return inParam{.addr = (const uint8_t *)param->data(), .len = (uint16_t)param->length(), .type = PARAM_NORMAL};
};
static inParam build_param(uint32_t *param) {
// This type is basically just for IP Addresses AFAIK, probably byteswap any uint32_t you want to survive...
return inParam{.addr = (uint8_t *)param, .len = 4, .type = PARAM_NORMAL};
};
static inParam build_param(uint16_t *param) {
// Beware ye who doth not pass a byteswapped uint16_t to this function
return inParam{.addr = (uint8_t *)param, .len = 2, .type = PARAM_NORMAL};
};
static inParam build_param(uint8_t *param) {
// Single bytes are easy, they can't get weird
return inParam{.addr = param, .len = 1, .type = PARAM_NORMAL};
};
static inParam build_param(const uint8_t *buffer, uint16_t len) {
// Normal params are good up to len 255
return inParam{.addr = buffer, .len = len, .type = PARAM_NORMAL};
};
static inParam build_param_buffer(const uint8_t *buffer, uint16_t len) {
// Buffer-type params are for length >255 (usually sending data) but <= 65535 because a uint32_t is too costly for an ESP32 :/
return inParam{.addr = buffer, .len = len, .type = PARAM_BUFFER};
};
static inParam build_param_dummy() {
return inParam{.type = PARAM_DUMMY};
};
bool send_command(uint8_t command, const inParam *params_in, uint8_t num_in, uint8_t *data, uint16_t *data_len, cmd_response_type response_type=RESPONSE_TYPE_CMD);
bool send_command(uint8_t command, SpiDrv::outParam *params_out, SpiDrv::numParams num_out);
private:
void get_param(uint8_t *param_out);
};
}
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