手头的ESP32-WROOM-32D模块配有单核CPU，因此Arduino IDE需要配置成单核编译模式。用ESP编译上传固件后，32个示例不断重启：
例如GetChipID，源代码：
uint32_t chipId = 0;
void setup() {
Serial.begin(115200);
}
void loop() {
for(int i=0; i<17; i=i 8) {
chipId |= ((ESP.getEfuseMac() >> (40 - i)) & 0xff) << i;
}
Serial.printf("ESP32 Chip model = %s Rev %d\n", ESP.getChipModel(), ESP.getChipRevision());
Serial.printf("This chip has %d cores\n", ESP.getChipCores());
Serial.print("Chip ID: "); Serial.println(chipId);
delay(3000);
}
以下信息将在运行后重启并打印：
Rebooting...
ets Jun 8 2016 00:22:57
rst:0xc (SW_CPU_RESET),boot:0x17 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0018,len:4
load:0x3fff001c,len:1216
ho 0 tail 12 room 4
load:0x40078000,len:10944
load:0x40080400,len:6388
entry 0x400806b4
E (104) system_api: Base MAC address from BLK0 of EFUSE CRC error, efuse_crc = 0x00; calc_crc = 0xd0
abort() was called at PC 0x400e1753 on core 0
ELF file SHA256: 0000000000000000
Backtrace: 0x4008443b:0x3ffb1ee0 0x40084699:0x3ffb1f00 0x400e1753:0x3ffb1f20 0x400d0cee:0x3ffb1f60 0x400d0b9b:0x3ffb1f90 0x400d14f1:0x3ffb1fb0 0x40085651:0x3ffb1fd0
若将源码中的
for(int i=0; i<17; i=i 8) {
chipId |= ((ESP.getEfuseMac() >> (40 - i)) & 0xff) << i;
}
注释这部分，即：
uint32_t chipId = 0;
void setup() {
Serial.begin(115200);
}
void loop() {
Serial.printf("ESP32 Chip model = %s Rev %d\n", ESP.getChipModel(), ESP.getChipRevision());
Serial.printf("This chip has %d cores\n", ESP.getChipCores());
Serial.print("Chip ID: "); Serial.println(chipId);
delay(3000);
}
则可以完全正。
请教各位大佬指教一下，这是什么原因？该如何解决？