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370 lines
9.6 KiB
370 lines
9.6 KiB
#include "ets_sys.h"
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#include "osapi.h"
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#include "gpio.h"
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#include "os_type.h"
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#include "user_interface.h"
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#include "espconn.h"
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#include "driver/spi_interface.h"
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#include "driver/uart.h"
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#include "crypto/sha.h"
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#define min(a,b) \
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({ __typeof__ (a) _a = (a); \
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__typeof__ (b) _b = (b); \
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_a < _b ? _a : _b; })
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#define max(a,b) \
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({ __typeof__ (a) _a = (a); \
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__typeof__ (b) _b = (b); \
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_a > _b ? _a : _b; })
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char ssid[32];
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char password[] = "testing123";
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int wifi_secure_mode = 0;
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static const int pin = 2;
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// Structure holding the TCP connection information.
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struct espconn tcp_conn;
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// TCP specific protocol structure.
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esp_tcp tcp_proto;
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// interrupt communication on port 1338, UDP!
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struct espconn inter_conn;
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esp_udp inter_proto;
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uint32_t sendData[0x14] = {0};
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uint32_t recvData[0x40] = {0};
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static int ICACHE_FLASH_ATTR __spi_comm(char *dat, int len, uint32_t *recvData, int recvDataLen) {
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unsigned int length = 0;
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SpiData spiData;
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spiData.cmd = 2;
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spiData.cmdLen = 0;
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spiData.addr = NULL;
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spiData.addrLen = 0;
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// float boot pin
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gpio_output_set(0, 0, 0, (1 << 4));
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// manual CS pin
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gpio_output_set(0, (1 << 5), 0, 0);
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memset(sendData, 0xCC, 0x14);
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// wait for ST to respond to CS interrupt
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os_delay_us(50);
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// send request
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memcpy(((void*)sendData), dat, len);
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spiData.data = sendData;
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spiData.dataLen = 0x14;
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SPIMasterSendData(SpiNum_HSPI, &spiData);
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#define SPI_TIMEOUT 50000
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// give the ST time to be ready, up to 500ms
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int i;
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for (i = 0; (gpio_input_get() & (1 << 4)) && i < SPI_TIMEOUT; i++) {
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os_delay_us(10);
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system_soft_wdt_feed();
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}
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// TODO: handle this better
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if (i == SPI_TIMEOUT) {
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os_printf("ERROR: SPI receive failed\n");
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goto fail;
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}
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// blank out recvData
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memset(recvData, 0x00, 0x44);
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// receive the length
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spiData.data = recvData;
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spiData.dataLen = 4;
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if(SPIMasterRecvData(SpiNum_HSPI, &spiData) == -1) {
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// TODO: Handle gracefully. Maybe fail if len read fails?
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os_printf("SPI: Failed to recv length\n");
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goto fail;
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}
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length = recvData[0];
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if (length > 0x40) {
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os_printf("SPI: BAD LENGTH RECEIVED %x\n", length);
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length = 0;
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goto fail;
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}
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// got response, 0x40 works, 0x44 does not
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spiData.data = recvData+1;
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spiData.dataLen = (length+3)&(~3); // recvDataLen;
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if(SPIMasterRecvData(SpiNum_HSPI, &spiData) == -1) {
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// TODO: Handle gracefully. Maybe retry if payload failed.
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os_printf("SPI: Failed to recv payload\n");
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length = 0;
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goto fail;
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}
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fail:
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// clear CS
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gpio_output_set((1 << 5), 0, 0, 0);
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// set boot pin back
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gpio_output_set((1 << 4), 0, (1 << 4), 0);
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return length;
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}
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int ICACHE_FLASH_ATTR spi_comm(char *dat, int len, uint32_t *recvData, int recvDataLen) {
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// blink the led during SPI comm
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if (GPIO_REG_READ(GPIO_OUT_ADDRESS) & (1 << pin)) {
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// set gpio low
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gpio_output_set(0, (1 << pin), 0, 0);
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} else {
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// set gpio high
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gpio_output_set((1 << pin), 0, 0, 0);
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}
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return __spi_comm(dat, len, recvData, recvDataLen);
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}
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static void ICACHE_FLASH_ATTR tcp_rx_cb(void *arg, char *data, uint16_t len) {
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// nothing too big
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if (len > 0x14) return;
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// do the SPI comm
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spi_comm(data, len, recvData, 0x40);
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espconn_send(&tcp_conn, recvData, 0x44);
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}
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void ICACHE_FLASH_ATTR tcp_connect_cb(void *arg) {
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struct espconn *conn = (struct espconn *)arg;
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espconn_set_opt(&tcp_conn, ESPCONN_NODELAY);
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espconn_regist_recvcb(conn, tcp_rx_cb);
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}
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// must be 0x44, because we can fit 4 more
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uint8_t buf[0x44*0x10];
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int queue_send_len = -1;
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void ICACHE_FLASH_ATTR poll_can(void *arg) {
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uint8_t timerRecvData[0x44] = {0};
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int i = 0;
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int j;
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while (i < 0x40) {
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int len = spi_comm("\x01\x00\x00\x00", 4, timerRecvData, 0x40);
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if (len == 0) break;
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if (len > 0x40) { os_printf("SPI LENGTH ERROR!"); break; }
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// if it sends it, assume it's valid CAN
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for (j = 0; j < len; j += 0x10) {
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memcpy(buf + i*0x10, (timerRecvData+4)+j, 0x10);
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i++;
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}
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}
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if (i != 0) {
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int ret = espconn_sendto(&inter_conn, buf, i*0x10);
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if (ret != 0) {
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os_printf("send failed: %d\n", ret);
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queue_send_len = i*0x10;
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} else {
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queue_send_len = -1;
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}
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}
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}
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int udp_countdown = 0;
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static volatile os_timer_t udp_callback;
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void ICACHE_FLASH_ATTR udp_callback_func(void *arg) {
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if (queue_send_len == -1) {
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poll_can(NULL);
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} else {
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int ret = espconn_sendto(&inter_conn, buf, queue_send_len);
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if (ret == 0) {
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queue_send_len = -1;
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}
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}
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if (udp_countdown > 0) {
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os_timer_arm(&udp_callback, 5, 0);
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udp_countdown--;
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} else {
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os_printf("UDP timeout\n");
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}
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}
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void ICACHE_FLASH_ATTR inter_recv_cb(void *arg, char *pusrdata, unsigned short length) {
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remot_info *premot = NULL;
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if (espconn_get_connection_info(&inter_conn,&premot,0) == ESPCONN_OK) {
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inter_conn.proto.udp->remote_port = premot->remote_port;
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inter_conn.proto.udp->remote_ip[0] = premot->remote_ip[0];
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inter_conn.proto.udp->remote_ip[1] = premot->remote_ip[1];
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inter_conn.proto.udp->remote_ip[2] = premot->remote_ip[2];
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inter_conn.proto.udp->remote_ip[3] = premot->remote_ip[3];
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if (udp_countdown == 0) {
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os_printf("UDP recv\n");
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udp_countdown = 200*5;
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// start 5 second timer
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os_timer_disarm(&udp_callback);
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os_timer_setfn(&udp_callback, (os_timer_func_t *)udp_callback_func, NULL);
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os_timer_arm(&udp_callback, 5, 0);
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} else {
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udp_countdown = 200*5;
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}
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}
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}
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void ICACHE_FLASH_ATTR wifi_configure(int secure) {
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wifi_secure_mode = secure;
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// start wifi AP
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wifi_set_opmode(SOFTAP_MODE);
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struct softap_config config = {0};
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wifi_softap_get_config(&config);
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strcpy(config.ssid, ssid);
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if (wifi_secure_mode == 0) strcat(config.ssid, "-pair");
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strcpy(config.password, password);
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config.ssid_len = strlen(config.ssid);
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config.authmode = wifi_secure_mode ? AUTH_WPA2_PSK : AUTH_OPEN;
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config.beacon_interval = 100;
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config.max_connection = 4;
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wifi_softap_set_config(&config);
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if (wifi_secure_mode) {
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// setup tcp server
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tcp_proto.local_port = 1337;
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tcp_conn.type = ESPCONN_TCP;
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tcp_conn.state = ESPCONN_NONE;
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tcp_conn.proto.tcp = &tcp_proto;
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espconn_regist_connectcb(&tcp_conn, tcp_connect_cb);
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espconn_accept(&tcp_conn);
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espconn_regist_time(&tcp_conn, 60, 0); // 60s timeout for all connections
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// setup inter server
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inter_proto.local_port = 1338;
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const char udp_remote_ip[4] = {255, 255, 255, 255};
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os_memcpy(inter_proto.remote_ip, udp_remote_ip, 4);
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inter_proto.remote_port = 1338;
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inter_conn.type = ESPCONN_UDP;
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inter_conn.proto.udp = &inter_proto;
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espconn_regist_recvcb(&inter_conn, inter_recv_cb);
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espconn_create(&inter_conn);
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}
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}
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void ICACHE_FLASH_ATTR wifi_init() {
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// default ssid and password
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memset(ssid, 0, 32);
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os_sprintf(ssid, "panda-%08x-BROKEN", system_get_chip_id());
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// fetch secure ssid and password
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// update, try 20 times, for 1 second
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for (int i = 0; i < 20; i++) {
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uint8_t digest[SHA_DIGEST_SIZE];
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char resp[0x20];
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__spi_comm("\x00\x00\x00\x00\x40\xD0\x00\x00\x00\x00\x20\x00", 0xC, recvData, 0x40);
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memcpy(resp, recvData+1, 0x20);
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SHA_hash(resp, 0x1C, digest);
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if (memcmp(digest, resp+0x1C, 4) == 0) {
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// OTP is valid
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memcpy(ssid+6, resp, 0x10);
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memcpy(password, resp+0x10, 10);
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break;
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}
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os_delay_us(50000);
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}
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// set IP
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wifi_softap_dhcps_stop(); //stop DHCP before setting static IP
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struct ip_info ip_config;
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IP4_ADDR(&ip_config.ip, 192, 168, 0, 10);
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IP4_ADDR(&ip_config.gw, 0, 0, 0, 0);
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IP4_ADDR(&ip_config.netmask, 255, 255, 255, 0);
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wifi_set_ip_info(SOFTAP_IF, &ip_config);
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int stupid_gateway = 0;
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wifi_softap_set_dhcps_offer_option(OFFER_ROUTER, &stupid_gateway);
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wifi_softap_dhcps_start();
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wifi_configure(0);
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}
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#define LOOP_PRIO 2
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#define QUEUE_SIZE 1
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static os_event_t my_queue[QUEUE_SIZE];
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void loop();
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void ICACHE_FLASH_ATTR web_init();
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void ICACHE_FLASH_ATTR elm327_init();
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void ICACHE_FLASH_ATTR user_init() {
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// init gpio subsystem
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gpio_init();
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// configure UART TXD to be GPIO1, set as output
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PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0TXD_U, FUNC_GPIO1);
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gpio_output_set(0, 0, (1 << pin), 0);
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// configure SPI
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SpiAttr hSpiAttr;
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hSpiAttr.bitOrder = SpiBitOrder_MSBFirst;
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hSpiAttr.speed = SpiSpeed_10MHz;
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hSpiAttr.mode = SpiMode_Master;
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hSpiAttr.subMode = SpiSubMode_0;
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// TODO: is one of these CS?
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WRITE_PERI_REG(PERIPHS_IO_MUX, 0x105);
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PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDI_U, 2); // configure io to spi mode
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PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTCK_U, 2); // configure io to spi mode
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PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTMS_U, 2); // configure io to spi mode
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PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDO_U, 2); // configure io to spi mode
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SPIInit(SpiNum_HSPI, &hSpiAttr);
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//SPICsPinSelect(SpiNum_HSPI, SpiPinCS_1);
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// configure UART TXD to be GPIO1, set as output
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PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO5_U, FUNC_GPIO5);
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gpio_output_set(0, 0, (1 << 5), 0);
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gpio_output_set((1 << 5), 0, 0, 0);
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// uart init
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uart_init(BIT_RATE_115200, BIT_RATE_115200);
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// led init
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PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO2_U, FUNC_GPIO2);
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gpio_output_set(0, (1 << pin), (1 << pin), 0);
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os_printf("hello\n");
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// needs SPI
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wifi_init();
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// support ota upgrades
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elm327_init();
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web_init();
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// set gpio high, so LED is off by default
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for (int i = 0; i < 5; i++) {
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gpio_output_set(0, (1 << pin), 0, 0);
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os_delay_us(50000);
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gpio_output_set((1 << pin), 0, 0, 0);
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os_delay_us(50000);
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}
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// jump to OS
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system_os_task(loop, LOOP_PRIO, my_queue, QUEUE_SIZE);
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system_os_post(LOOP_PRIO, 0, 0);
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}
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void ICACHE_FLASH_ATTR loop(os_event_t *events) {
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system_os_post(LOOP_PRIO, 0, 0);
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}
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