但我收到错误:从“‘char*”到“’const uint8_t*”的转换无效定义一个指向字符常量的指针，这里，ptr是一个指向 char* 类型的常量，所以不能用ptr来修改所指向的内容，换句话说，*ptr的值为const，不能修改。但是ptr的声明并不意味着它指向的值实际上就是一个常量，而只是意味着对ptr而言，这个值是常量。...
const uint8_t *byte = data; uint8_laipuhuo.com t crc = 0x00; for (; len > 0; len--) { crc = crc8_table[(crc ^ *byte++) & 0xFF]; } return crc; } int main(int argc, char *argv[]) { int fd; uint8_t buffer; size_t bytes_read; uint8_t crc; if (argc != 2)...
50 | void beginSSL(const char * host, uint16_t port, const char * url = "/", const uint8_t * fingerprint = NULL, const char * protocol = "arduino"); | ^ exit status 1 invalid conversion from 'const char*' to 'const uint8_t*' {aka 'const unsigned char*'} [-fpermissive] ...
//constructor, choose pins to use as well as display size shift7seg(const uint8_t _dataPin, const uint8_t _latchPin, const uint8_t _clkPin, const uint8_t _num_digits); static constexpr uint8_t numbers[10] = // 7 segment values for decimals 0..9 { //TRUTH TABLE | 0 = se...
mqtt_display.drawBitmap(85,68,(uint8_t *)BiliBili_1,60,60,MAGENTA); } void loop() { if (!client.connected()) { reconnect(); } client.loop(); } void mediabuttons() { // play mqtt_display.fillScreen(ST77XX_BLACK); mqtt_display.fillRoundRect(30, 160, 78, 60, 8, ST77XX_WH...
_SFR_IO8(pins[pin].p-1) &= ~pins[pin].bit_mask; }mDigitalWrite(pin, dir&2); } It's not perfect and it can be done better. (It was just proof of concept, it was never used) The Arduino storesSFRpointers into thePROGMEMin the same way - asuint16_t....
C-style const arrays (eg, from xxd) are uint8_t arrays. I'm not entirely sure how the mapper is aligning ro-data, but if it is translating your 8-bit array into 32-bit aligned memory, that might be taking a lot more space than you expect. I use const arrays all the time to ...
uint8_tnum =12;StringstringOne, stringTwo, stringThree, stringFour;Stringbase64image = String();stringOne= String("id=7292&num=");stringThree= String(" =");stringFour= String(base64::encode(fb->buf, fb->len));stringTwo= String(num);base64image= stringOne + stringTwo + stringThree...
[副本](const uint8_t *)buffer16表示将buffer16转换为指向不应用于修改对象的uint8_t字节的指针。
bitstream =ConstBitStream(bytes=bitstream)# Read the next header typepacket.next_header = bitstream.read('uint:8')# Read the header length, given in multiples of 8 octetsheader_length = bitstream.read('uint:8') +1# Read the optionsoptions_length = (header_length *8) -2packet.options =...