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Implements data complement status checking and MX29F0x0 flash

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This commit is contained in:
Roger Braunstein 2024-06-29 18:17:26 -07:00
parent 2abde7f2fc
commit efe0dcf47d
1 changed files with 50 additions and 10 deletions
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60
Cart_Reader/PCE.ino
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@ -837,7 +837,32 @@ void flash_mode_PCE() {
// write_byte_PCE sets WR
}
// Implements data complement status checking
void flash_wait_status_PCE(uint8_t expected) {
set_cs_rd_low_PCE();
data_input_PCE();
// We only look at D7, or the highest bit of expected
expected >>= 7;
uint8_t status;
do {
PORTH &= ~(1 << 3); // RD low
// one nop = 62.5ns
// tOE = 30-50ns depending on flash
NOP;
status = PINC;
PORTH |= (1 << 3); // RD high
// reversed, bit 0 is the MSB
} while ((status & 0x1) != expected);
data_output_PCE();
// leave RD high on exit
}
void flash_PCE() {
println_Msg(F("Detecting..."));
display_Update();
// SOFTWARE ID PROGRAM
flash_mode_PCE();
write_byte_PCE(0x5555, 0xAA);
@ -845,7 +870,7 @@ void flash_PCE() {
write_byte_PCE(0x5555, 0x90);
data_input_PCE();
// tIDA = 150ns
delayMicroseconds(1);
NOP;NOP;NOP;
// MFG,DEVICE
uint16_t deviceId = (read_byte_PCE(0x0) << 8) | read_byte_PCE(0x1);
@ -869,10 +894,19 @@ void flash_PCE() {
// SST39SF040 = 4Mbit
flashSize = 524288UL;
break;
case 0xC2A4:
// MX29F040 = 4Mbit
flashSize = 524288UL;
break;
case 0xC2D5:
// MX29F080 = 8Mbit
flashSize = 1048576UL;
break;
}
if (flashSize <= 0) {
println_Msg(F("FLASH NOT DETECTED"));
print_Msg(F("UNKNOWN "));
println_Msg(deviceId);
display_Update();
wait();
resetArduino();
@ -892,7 +926,7 @@ void flash_PCE() {
if (openFlashFile()) {
print_STR(flashing_file_STR, true);
println_Msg(F("Erasing..."));
display_Update();
// CHIP ERASE PROGRAM
@ -903,14 +937,16 @@ void flash_PCE() {
write_byte_PCE(0x5555, 0xAA);
write_byte_PCE(0x2AAA, 0x55);
write_byte_PCE(0x5555, 0x10);
// tSCE = 100ms
delay(100);
pin_init_PCE();
// Data complement polling, wait until highest bit is 1
flash_wait_status_PCE(0xFF);
print_STR(flashing_file_STR, true);
display_Update();
uint32_t processedProgressBar = 0;
uint32_t totalProgressBar = (uint32_t)fileSize;
draw_progressbar(0, totalProgressBar);
unsigned long startMs = millis();
flash_mode_PCE();
const size_t BUFSIZE = 512;
for (unsigned long currAddr = 0; currAddr < fileSize; currAddr += BUFSIZE) {
@ -922,14 +958,17 @@ void flash_PCE() {
for (int currByte = 0; currByte < BUFSIZE; currByte++) {
// BYTE PROGRAM
byte b = sdBuffer[currByte];
write_byte_PCE(0x5555, 0xAA);
write_byte_PCE(0x2AAA, 0x55);
write_byte_PCE(0x5555, 0xA0);
write_byte_PCE(currAddr + currByte, sdBuffer[currByte]);
// Could detect status with toggle bit or data complement, but already quite fast
write_byte_PCE(currAddr + currByte, b);
flash_wait_status_PCE(b);
// tBP = 20us
delayMicroseconds(20);
// delayMicroseconds(20);
// status polling = 38s
}
// update progress bar
@ -938,6 +977,7 @@ void flash_PCE() {
}
myFile.close();
pin_init_PCE();
println_Msg((millis() - startMs) / 1000);
print_STR(done_STR, true);
}
display_Update();