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V22A Changed N64 timings a bit

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Still fails to read the N64 repro but now at least it fails consistently ...
This commit is contained in:
sanni 2017-02-24 16:19:06 +01:00 committed by GitHub
parent 40b9d0ec75
commit 82c69924e3
2 changed files with 46 additions and 23 deletions
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8
Cart_Reader/Cart_Reader.ino
View File

@ -2,8 +2,8 @@
Cartridge Reader for Arduino Mega2560 Cartridge Reader for Arduino Mega2560
Author: sanni Author: sanni
Date: 2017-02-11 Date: 2017-02-24
Version: V22 Version: V22A
SD lib: https://github.com/greiman/SdFat SD lib: https://github.com/greiman/SdFat
LCD lib: https://github.com/adafruit/Adafruit_SSD1306 LCD lib: https://github.com/adafruit/Adafruit_SSD1306
@ -34,7 +34,7 @@
YamaArashi - GBA flashrom bank switch command YamaArashi - GBA flashrom bank switch command
**********************************************************************************/ **********************************************************************************/
char ver[5] = "V22"; char ver[5] = "V22A";
/****************************************** /******************************************
Define Output Define Output
@ -907,7 +907,7 @@ void wait_btn() {
int b = checkButton(); int b = checkButton();
// Send some clock pulses to the Eeprom in case it locked up // Send some clock pulses to the Eeprom in case it locked up
if (mode == mode_N64_Cart) { if ((mode == mode_N64_Cart) && ((saveType == 5) || (saveType == 6))) {
pulseClock_N64(1); pulseClock_N64(1);
} }
// if the cart readers input button is pressed shortly // if the cart readers input button is pressed shortly

61
Cart_Reader/N64.ino
View File

@ -252,18 +252,24 @@ void setup_N64_Controller() {
} }
void setup_N64_Cart() { void setup_N64_Cart() {
// Set Address Pins to Output // Set Address Pins to Output and set them low
//A0-A7 //A0-A7
DDRF = 0xFF; DDRF = 0xFF;
PORTF = 0x00;
//A8-A15 //A8-A15
DDRK = 0xFF; DDRK = 0xFF;
PORTK = 0x00;
// Set Control Pins to Output WR(PH5) RD(PH6) aleL(PC0) aleH(PC1) // Set Control Pins to Output RESET(PH0) WR(PH5) RD(PH6) aleL(PC0) aleH(PC1)
DDRH |= (1 << 5) | (1 << 6); DDRH |= (1 << 0) | (1 << 5) | (1 << 6);
DDRC |= (1 << 0) | (1 << 1); DDRC |= (1 << 0) | (1 << 1);
// Output a high signal on all pins, pins are active low therefore everything is disabled now // Pull RESET(PH0) low until we are ready
PORTH &= ~(1 << 0);
// Output a high signal on WR(PH5) RD(PH6), pins are active low therefore everything is disabled now
PORTH |= (1 << 5) | (1 << 6); PORTH |= (1 << 5) | (1 << 6);
PORTC |= (1 << 0) | (1 << 1); // Pull aleL(PC0) low and aleH(PC1) high
PORTC &= ~(1 << 0);
PORTC |= (1 << 1);
// Set Eeprom Clock Pin(PH1) to Output // Set Eeprom Clock Pin(PH1) to Output
DDRH |= (1 << 1); DDRH |= (1 << 1);
@ -275,8 +281,24 @@ void setup_N64_Cart() {
// Activate Internal Pullup Resistors // Activate Internal Pullup Resistors
//PORTH |= (1 << 4); //PORTH |= (1 << 4);
/* Adafruit Clock Generator
//clockgen.set_correction(-29000);
clockgen.set_correction(0);
clockgen.init(SI5351_CRYSTAL_LOAD_8PF, 0);
clockgen.set_pll(SI5351_PLL_FIXED, SI5351_PLLA);
//clockgen.set_pll(SI5351_PLL_FIXED, SI5351_PLLB);
clockgen.set_freq(200000000ULL, SI5351_PLL_FIXED, SI5351_CLK1);
clockgen.output_enable(SI5351_CLK0, 0);
clockgen.output_enable(SI5351_CLK1, 1);
clockgen.output_enable(SI5351_CLK2, 0);
*/
// Wait until all is stable // Wait until all is stable
delay(500); delay(300);
// Pull RESET(PH0) high
PORTH |= (1 << 0);
delay(10);
// Print start page // Print start page
getCartInfo_N64(); getCartInfo_N64();
@ -337,8 +359,10 @@ void setup_N64_Cart() {
void adOut_N64() { void adOut_N64() {
//A0-A7 //A0-A7
DDRF = 0xFF; DDRF = 0xFF;
PORTF = 0x00;
//A8-A15 //A8-A15
DDRK = 0xFF; DDRK = 0xFF;
PORTK = 0x00;
} }
// Switch Cartridge address/data pins to read // Switch Cartridge address/data pins to read
@ -351,13 +375,13 @@ void adIn_N64() {
// Set Cartridge address // Set Cartridge address
void setAddress_N64(unsigned long myAddress) { void setAddress_N64(unsigned long myAddress) {
// Set address pins to output
adOut_N64();
// Split address into two words // Split address into two words
word myAdrLowOut = myAddress & 0xFFFF; word myAdrLowOut = myAddress & 0xFFFF;
word myAdrHighOut = myAddress >> 16; word myAdrHighOut = myAddress >> 16;
// Set address pins to output
adOut_N64();
// Switch WR(PH5) RD(PH6) ale_L(PC0) ale_H(PC1) to high (since the pins are active low) // Switch WR(PH5) RD(PH6) ale_L(PC0) ale_H(PC1) to high (since the pins are active low)
PORTH |= (1 << 5) | (1 << 6); PORTH |= (1 << 5) | (1 << 6);
PORTC |= (1 << 0) | (1 << 1); PORTC |= (1 << 0) | (1 << 1);
@ -366,33 +390,30 @@ void setAddress_N64(unsigned long myAddress) {
PORTF = myAdrHighOut & 0xFF; PORTF = myAdrHighOut & 0xFF;
PORTK = (myAdrHighOut >> 8) & 0xFF; PORTK = (myAdrHighOut >> 8) & 0xFF;
// Leave ale_H high for additional 120ns // Leave ale_H high for additional 125ns
__asm__("nop\n\t""nop\n\t"); __asm__("nop\n\t""nop\n\t");
// Pull ale_H(PC1) low // Pull ale_H(PC1) low
PORTC &= ~(1 << 1); PORTC &= ~(1 << 1);
// Leave address pins stable for a little bit // Leave address pins stable for a little bit
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t"); //__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Output low part to address pins // Output low part to address pins
PORTF = myAdrLowOut & 0xFF; PORTF = myAdrLowOut & 0xFF;
PORTK = (myAdrLowOut >> 8) & 0xFF; PORTK = (myAdrLowOut >> 8) & 0xFF;
// Leave ale_L high for ~180ns // Leave ale_L high for ~125ns
__asm__("nop\n\t""nop\n\t""nop\n\t"); __asm__("nop\n\t""nop\n\t");
// Pull ale_L(PC0) low // Pull ale_L(PC0) low
PORTC &= ~(1 << 0); PORTC &= ~(1 << 0);
// Leave address pins stable for a little bit // Wait ~1000ns just to be sure address is set
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t"); __asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Set data pins to input // Set data pins to input
adIn_N64(); adIn_N64();
// Wait ~600ns just to be sure address is set
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t");
} }
// Read one word out of the cartridge // Read one word out of the cartridge
@ -400,7 +421,7 @@ word readWord_N64() {
// Pull read(PH6) low // Pull read(PH6) low
PORTH &= ~(1 << 6); PORTH &= ~(1 << 6);
// Wait ~300ns // Wait ~310ns
__asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t"); __asm__("nop\n\t""nop\n\t""nop\n\t""nop\n\t""nop\n\t");
// Join bytes from PINF and PINK into a word // Join bytes from PINF and PINK into a word
@ -409,6 +430,8 @@ word readWord_N64() {
// Pull read(PH6) high // Pull read(PH6) high
PORTH |= (1 << 6); PORTH |= (1 << 6);
// Wait 62.5ns
__asm__("nop\n\t");
return tempWord; return tempWord;
} }