65 lines
1.1 KiB
C++
65 lines
1.1 KiB
C++
#define ROM_SIZE (0xffff)
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#define SER_BUF (1024)
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#define SIG_RESET ('r')
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#define SIG_WRITE ('w')
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enum states {
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IDLE,
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WRITE // write rom to memory
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};
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void do_reset() {
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SCB->AIRCR = 0x05fa0004;
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}
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enum states state = IDLE;
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volatile static uint8_t rom[ROM_SIZE];
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uint8_t buf[SER_BUF];
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uint16_t rom_idx = 0;
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uint32_t start = 0;
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void setup() {
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bzero(&buf, SER_BUF);
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bzero((void*)&rom, ROM_SIZE);
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Serial.begin(115200);
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start = millis();
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state = IDLE;
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Serial.println("READY");
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}
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void flush_serial() {
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while(Serial.available() > 0) Serial.read();
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}
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void loop() {
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if(state == IDLE) {
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char c = Serial.read();
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if(c == SIG_RESET) {
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Serial.println("resetting");
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delay(1000);
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do_reset();
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} else if(c == SIG_WRITE) {
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state = WRITE;
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rom_idx = 0;
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bzero((void*)&rom, ROM_SIZE);
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start = millis();
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Serial.println("Ready for ROM");
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}
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} else if(state == WRITE) {
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while(true && rom_idx < 0x7ffe && millis() - start < 3000) {
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while(Serial.available()) rom[rom_idx++] = Serial.read();
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}
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state = IDLE;
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Serial.printf("Read 0x%04X bytes into memory\r\n", rom_idx);
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}
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}
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