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author | Roger Braunstein <[email protected]> | 2024-06-29 18:17:26 -0700 |
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committer | Roger Braunstein <[email protected]> | 2024-06-29 18:17:26 -0700 |
commit | efe0dcf47d3a230eda2120066c98b1d53d303f4c (patch) | |
tree | 7fb41a81122407db7157313040df01df801a660a | |
parent | 2abde7f2fc3d5301f4e26176e4b503287d3f523a (diff) | |
download | cartreader-efe0dcf47d3a230eda2120066c98b1d53d303f4c.tar.gz cartreader-efe0dcf47d3a230eda2120066c98b1d53d303f4c.zip |
Implements data complement status checking and MX29F0x0 flash
-rw-r--r-- | Cart_Reader/PCE.ino | 60 |
1 files changed, 50 insertions, 10 deletions
diff --git a/Cart_Reader/PCE.ino b/Cart_Reader/PCE.ino index e3e5f66..e514f18 100644 --- a/Cart_Reader/PCE.ino +++ b/Cart_Reader/PCE.ino @@ -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(); |