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Change IO? pin as input

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Simplify MMC unlock procedure
This commit is contained in:
splash5 2019-10-18 11:31:35 +08:00
parent 7deb455d41
commit c45bdbf07d
1 changed files with 12 additions and 48 deletions
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60
Cart_Reader/WS.ino
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@ -86,12 +86,16 @@ void setup_WS()
// controls
DDRH |= ((1 << 0) | (1 << 3) | (1 << 4) | (1 << 5) | (1 << 6));
PORTH |= ((1 << 0) | (1 << 3) | (1 << 4) | (1 << 5) | (1 << 6));
DDRE |= ((1 << 3) | (1 << 4));
PORTE |= (1 << 4);
// CLK outputs LOW
DDRE |= (1 << 3);
PORTE &= ~(1 << 3);
// interrupt pin with internal pull-up
// IO? as input with internal pull-up enabled
DDRE &= ~(1 << 4);
PORTE |= (1 << 4);
// INT as input with internal pull-up enabled
DDRG &= ~(1 << 5);
PORTG |= (1 << 5);
@ -1146,6 +1150,7 @@ void generateEepromInstruction_WS(uint8_t *instruction, uint8_t opcode, uint16_t
// 2003 MMC need to be unlock,
// or it will reject all reading and bank switching
// All signals' timing are analyzed by using LogicAnalyzer
boolean unlockMMC2003_WS()
{
dataOut_WS();
@ -1156,7 +1161,6 @@ boolean unlockMMC2003_WS()
PORTH &= ~(1 << 0);
PORTE &= ~(1 << 3);
PORTH |= ((1 << 3) | (1 << 4) | (1 << 5) | (1 << 6));
PORTE |= (1 << 4);
// switch RST(PH0) to HIGH
PORTH |= (1 << 0);
@ -1165,57 +1169,17 @@ boolean unlockMMC2003_WS()
PORTC = 0xff;
PORTA = 0x00;
// port = 0x5a?
PORTF = 0x0a;
PORTL = 0x05;
pulseCLK_WS(5);
// port = 0xa5?
PORTF = 0x05;
PORTL = 0x0a;
pulseCLK_WS(4);
// IO(PE4) to LOW
PORTE &= ~(1 << 4);
pulseCLK_WS(6);
// IO(PE4) to HIGH
PORTE |= (1 << 4);
pulseCLK_WS(1);
// IO(PE4) to LOW
PORTE &= ~(1 << 4);
pulseCLK_WS(1);
// IO(PE4) to HIGH
PORTE |= (1 << 4);
pulseCLK_WS(1);
// IO(PE4) to LOW
PORTE &= ~(1 << 4);
pulseCLK_WS(3);
// IO(PE4) to HIGH
PORTE |= (1 << 4);
pulseCLK_WS(1);
// IO(PE4) to LOW
PORTE &= ~(1 << 4);
pulseCLK_WS(1);
// IO(PE4) to HIGH
PORTE |= (1 << 4);
pulseCLK_WS(1);
// IO(PE4) to LOW
PORTE &= ~(1 << 4);
pulseCLK_WS(3);
// IO(PE4) to HIGH
PORTE |= (1 << 4);
// pulse CLK once
pulseCLK_WS(1);
// MMC is outputing something on IO? pin synchronized with CLK
// so still need to pulse CLK until everything is ok
pulseCLK_WS(19);
// unlock procedure finished
// see if we can set bank number to MMC